SYMBIO ™ 700 INFORMATION & TROUBLESHOOTING MANUAL

APRIL 2021 ~UNOFFICIAL~

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Introduction
This publication covers both electromechanical
and Symbio™ controls. Due to the more
complex application and service opportunities,
greater emphasis is placed on units with
Symbio™ controls.
This publication does not cover all aspects of
service. It assumes the service person is an
experienced commercial service technician with
a strong background in electrical controls and
DC circuits. If you are not experienced and fully
qualified in HVAC service, do not attempt to use
this manual to service equipment.

Important Environmental Concerns

Scientific research has shown that certain man-
made chemicals can affect the earth’s naturally
occurring stratospheric ozone layer when
released to the atmosphere. In particular,
several of the identified chemicals that may
affect the ozone layer are refrigerants that
contain Chlorine, Fluorine and Carbon (CFCs)
and those containing Hydrogen, Chlorine,
Fluorine and Carbon (HCFCs). Not all
refrigerants containing these compounds have
the same potential impact to the environment.
Trane advocates the responsible handling of all
refrigerants-including industry replacements for
CFCs and HCFCs such as saturated or
unsaturated HFCs and HCFCs.

Important Responsible Refrigerant

Practices
Trane believes that responsible refrigerant
practices are important to the environment, our
customers, and the air conditioning industry. All
technicians who handle refrigerants must be
certified according to local rules. For the USA,
the Federal Clean Air Act (Section 608) sets
forth the requirements for handling, reclaiming,
recovering and recycling of certain refrigerants
and the equipment that is used in these
service procedures. In addition, some states or
municipalities may have additional
requirements that must also be adhered to for
responsible management of refrigerants. Know
the applicable laws and follow them.

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Contents
Control Box Layouts ................................................................................................................................... 14
Single Fan Condenser ............................................................................................................................. 14
Dual Fan Condenser ............................................................................................................................... 14
Air Handler.............................................................................................................................................. 15
Symbio™ 700 Unit Controller (UC)............................................................................................................. 16
Symbio™ 700 Unit Controller (UC) Troubleshooting Info ......................................................................... 17
Symbio™ 700 Unit Controller LEDS ............................................................................................................ 18
LED Description Notes ............................................................................................................................ 18
Symbio™ 700 Unit LED Functions .............................................................................................................. 19
Symbio 700 Factory Connections ............................................................................................................... 20
Symbio 700 Field Connections ................................................................................................................... 23
Odyssey Adapter Board ............................................................................................................................. 24
Troubleshooting the Compressor Circuit(s) .............................................................................................. 28
Circuit 1 ................................................................................................................................................... 28
Circuit 2 ................................................................................................................................................... 29
Compressor Control Circuit Troubleshooting Tips - derived from bench testing. ..................................... 30
Compressor Protection – (HPC, DTL or Aux switch proving trip) .............................................................. 31
Compressor “X” Proving Trip & Lockout................................................................................................ 31
Two cases can cause a “Circuit X Proving Lockout” event: ................................................................... 31
Compressor X Contactor Failure (Manual Reset) .................................................................................. 31
Compressor Protection – Low Pressure Cutout Control ........................................................................... 32
Prior to Compressor Startup: ................................................................................................................. 32
After Compressor Startup: ..................................................................................................................... 32
Circuit X LPC Trip (Auto-Reset): ............................................................................................................. 32
For Cooling Only Units or Heat Pumps in Active Cooling: ................................................................. 32
For Heat Pump Units in Active Mechanical Heating and Outdoor Air Temperature ≥ 0°F .............. 33
Circuit “X” Low Pressure Lockout (Manual Reset) ................................................................................ 33
Odyssey Relay Board .................................................................................................................................. 34
Odyssey Options Board – BAYMODU001 .................................................................................................. 37
Indoor Options Module Factory Connections ........................................................................................... 38
J11 Options Module Addressing - future ................................................................................................... 39
Indoor Options Module Communication Troubleshooting ...................................................................... 41

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Adding Electric Heat to a Symbio Air Handler paired with a Symbio Condenser .................................... 43
Electric Heat Adapter Harnesses................................................................................................................ 44
Electric Heat Wiring Diagrams ................................................................................................................... 45
Phase Monitor ............................................................................................................................................ 46
Phase Monitor Wire Connections .............................................................................................................. 47
Emergency Stop .......................................................................................................................................... 48
Supply Air Tempering ................................................................................................................................. 49
Heat Pump Heating Lockout ...................................................................................................................... 50
When the Outdoor Air Temperature Active ≤ Heat Pump Heating Lockout Setpoint – Active: ......... 50
When the Outdoor Air Temperature Active > Heat Pump Heating Lockout Setpoint – Active + 5F: .. 50
Symbio 700 Demand Defrost Operation - derived from bench testing ..................................................... 51
First Defrost permit conditions after Power Up. ................................................................................... 51
Subsequent Defrosts permit conditions. ............................................................................................... 51
Sequence of Operation .......................................................................................................................... 51
Defrost Termination ............................................................................................................................... 51
Defrost Cycle Example............................................................................................................................ 52
Independent Circuit Defrost Operation................................................................................................. 52
Default Mode.......................................................................................................................................... 52
Condenser Defrost (Heat Pumps Only)...................................................................................................... 53
Demand Defrost Control ........................................................................................................................ 53
Temperature Sensors (NTC) ....................................................................................................................... 55
Zone Sensor Mode ..................................................................................................................................... 58
Zone Sensor Setpoint ................................................................................................................................. 58
Zone Sensor Info ......................................................................................................................................... 59
BAYSENS800 wiring ................................................................................................................................ 59
BAYSENS135 / X13790886 / Wiring ....................................................................................................... 60
Zone Sensor Averaging ............................................................................................................................... 61
Remote Sensor Wiring ............................................................................................................................... 62
Additional Thermostat / Zone Sensor Info ............................................................................................ 63
Condenser Fan Rotation for Dual Fan Units .............................................................................................. 64
Condenser Fan Staging ............................................................................................................................... 65
Dual condenser fan - shared airstream manifolded (cooling only)....................................................... 65
Dual condenser fan - independent airstream dual (cooling only and heat pump) .............................. 65

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Compressor Staging.................................................................................................................................... 66
Cooling Only (Electric Heat) – CVZT & VVZT .......................................................................................... 66
Dual compressor cooling staging (manifold or independent) .......................................................... 66
Dual unloading compressor cooling staging (10 and 20 ton)............................................................ 66
Heat Pump – CVZT & VVZT ..................................................................................................................... 66
Dual compressor cooling staging (manifold or independent) .......................................................... 66
Constant Volume/Multi-Speed Fan Space Temperature Control (CVZT) ................................................. 67
Space Temperature Recovery ................................................................................................................ 67
Supply Fan Control ................................................................................................................................. 67
Constant Volume/Multi-Speed Fan Space Temperature Control (CVZT) Chart ................................... 68
Variable Volume Fan Space Temperature Control (SZVAV/VVZT) ........................................................... 69
Supply Fan Control ................................................................................................................................. 69
Variable Volume Fan Space Temperature Control (SZVAV/VVZT) Chart ............................................. 70
VVZT DAT Control Mode ............................................................................................................................ 71
Supply Fan Speed Control .......................................................................................................................... 72
Single-Speed, belt-driven fans ............................................................................................................... 72
2-Speed & Variable Speed VFD-driven fans .......................................................................................... 72
Supply Fan Status Points ........................................................................................................................ 72
Single-Speed ....................................................................................................................................... 72
VFD-driven .......................................................................................................................................... 72
Fan Setpoints with VFD-driven Fan Types ............................................................................................. 72
Supply Fan Maximum Speed Setpoint ............................................................................................... 72
Supply Fan Minimum Speed Setpoint ............................................................................................... 73
Supply Fan Percentages ............................................................................................................................. 73
Multi-speed minimum supply fan speeds ............................................................................................. 73
Variable speed minimum supply fan speeds......................................................................................... 73
Airflow Adjustments .................................................................................................................................. 74
Constant Volume Units .......................................................................................................................... 74
2 Stage Airflow/Single Zone VAV (Symbio Cond Only) ......................................................................... 74
2 Stage Airflow (Electromechanical Cond Only) .................................................................................... 74
Symbio TR-150 VFD Parameters ................................................................................................................ 75
VFD Parameter Info ................................................................................................................................ 77
VFD Harness Part Numbers .................................................................................................................... 77

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 VFD Faults requiring Manual Reset ....................................................................................................... 77
Diagnostic: Supply Fan Failure ........................................................................................................... 77
Supply Fan VFD Communication Status ............................................................................................ 77
TR150 VFD Communication Troubleshooting ........................................................................................... 78
Evaporator Defrost Control........................................................................................................................ 80
If configured for Evaporator Defrost Control = Enabled: ...................................................................... 80
If configured for FroStat = Installed: ...................................................................................................... 80
SYMBIO 700 Phone APP ............................................................................................................................. 81
Download the App! .................................................................................................................................... 82
Symbio Service & Installation (mobile app) Overview ............................................................................. 83
Bluetooth Connection & Pairing ............................................................................................................ 83
Login............................................................................................................................................................ 85
Unit List ....................................................................................................................................................... 86
HOME .......................................................................................................................................................... 88
SETTINGS..................................................................................................................................................... 91
Manage Settings ..................................................................................................................................... 91
View Configuration Sub-Menu ............................................................................................................... 94
STATUS ...................................................................................................................................................... 101
ALARMS .................................................................................................................................................... 106
TOOLS........................................................................................................................................................ 107
Service Test Mode ................................................................................................................................ 108
Service................................................................................................................................................... 110
IMC Link Reset ...................................................................................................................................... 112
Backup .................................................................................................................................................. 115
Restore.................................................................................................................................................. 116
Update Firmware ................................................................................................................................. 118
Restart Controller ................................................................................................................................. 120
Notes ......................................................................................................................................................... 121
Notes ......................................................................................................................................................... 122
Symbio 700 UC Onboard User Interface Menu Structure ....................................................................... 123
Symbio 700 UC Onboard User Interface Menu Items ............................................................................. 124
HOME .................................................................................................................................................... 125
Status .................................................................................................................................................... 126

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 Active Setpoints................................................................................................................................ 126
System .............................................................................................................................................. 127
Indoor ............................................................................................................................................... 129
Refrigeration..................................................................................................................................... 130
Heat................................................................................................................................................... 131
Settings ................................................................................................................................................. 132
System .............................................................................................................................................. 132
Indoor ............................................................................................................................................... 133
Refrigeration..................................................................................................................................... 133
Heat................................................................................................................................................... 134
Service................................................................................................................................................... 135
Diagnostics ........................................................................................................................................ 135
Test.................................................................................................................................................... 135
Statistics Reset.................................................................................................................................. 135
Options Modules .............................................................................................................................. 136
Modbus ............................................................................................................................................. 136
Utilities.................................................................................................................................................. 137
About ................................................................................................................................................ 137
Active Configuration......................................................................................................................... 137
Edit Configuration ............................................................................................................................ 138
Display .............................................................................................................................................. 139
Date and Time .................................................................................................................................. 139
LON ................................................................................................................................................... 139
Initiating Test Mode on an Odyssey Symbio using the Onboard User Interface. .................................. 140
To Initiate Test Mode ........................................................................................................................... 140
To Exit Test Mode ................................................................................................................................. 140
Interconnecting Wiring Between Condensers and Air Handlers ............................................................ 141
Interconnecting Wire Info. ....................................................................................................................... 141
Pairing A & B: Symbio Condenser or Heat Pump with Constant Volume Air Handler or SZVAV / 2 Speed
Air Handler................................................................................................................................................ 142
Pairing C: Legacy Electromechanical Condenser with Symbio 2-Speed Air Handler ............................. 142
Symbio Condenser (Cooling or Heat Pump) with Legacy CV Air Handler............................................... 144
Symbio Condenser (Cooling Only) with Legacy 2 Speed Electromechanical Air Handler ...................... 145

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Legacy Electromechanical Condenser with Symbio CV Air Handler ....................................................... 146
Legacy Reliatel Condenser (Cooling or Heat Pump) with Symbio CV Air Handler ................................. 147
- Pairings not in the IOM - ......................................................................................................................... 148
Reliatel Condenser paired with a Symbio SZVAV Air Handler ............................................................ 149
Symbio Condenser (Cooling Only) with Reliatel SZVAV Air Handler (TR-150 only) ........................... 151
Symbio Condenser (Cooling Only) with Reliatel SZVAV Air Handler (TR-150 and TR-200) ............... 153
Experimental Relay Logic Defrost Heat Circuit ........................................................................................ 156
Odyssey Air Handler R22 and R410a TXV Valve Conversion Guide ........................................................ 157
Odyssey Refrigeration Miscellaneous Info. ............................................................................................. 158
Microchannel Heat Exchanger Condensers (MCHE) ........................................................................... 158
Solenoid Valves .................................................................................................................................... 158
Moisture-Indicating Sight glass ............................................................................................................ 158
Hot Gas Bypass ..................................................................................................................................... 159
Line Sizing ............................................................................................................................................. 159
Oil-Traps ............................................................................................................................................... 159
Leak Checking ....................................................................................................................................... 159
System Evacuation ............................................................................................................................... 159
Unit Charging ........................................................................................................................................ 160
TTA Charging and Pressure Charts ........................................................................................................... 161
TTA0724*A* with TWE0904*A* .......................................................................................................... 162
TTA0724*D* with TWE0724*B* .......................................................................................................... 163
TTA0724*D* TWE0724*B* Pressure Curve ......................................................................................... 164
TTA0904*A* with TWE0904*A* .......................................................................................................... 165
TTA0904*A* with TWE1204*A* .......................................................................................................... 166
TTA0904*D* with TWE0904*D* .......................................................................................................... 167
TTA0904*D* with TWE0904*D* Pressure Curve................................................................................. 168
TTA1204*C* with TWE1204*A* ........................................................................................................... 169
TTA1204*D with TTA1204*C ................................................................................................................ 170
TTA1204*D with TTA1204*C Pressure Curve ...................................................................................... 171
TTA1204*D with TTA1204*C ................................................................................................................ 172
TTA1204*D with TTA1204*C Pressure Curve ...................................................................................... 173
TTA1804*D* with TWE2404*B* .......................................................................................................... 174
TTA1804*D* with TWE2404*B* Pressure Curve ................................................................................. 175

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 TTA1804*C* with TWE1804*B* ........................................................................................................... 176
TTA2404*D* with TWE2404*B* .......................................................................................................... 177
TTA2404*D* with TWE2404*B* Pressure Curve ................................................................................. 178
TTA2404*C* with TWE2404*B* ........................................................................................................... 179
TTA3004*C* with TWE3004*B* ........................................................................................................... 180
TTA0902*A* with TWE0902*A* .......................................................................................................... 181
TTA1202*A* with TWE1202*A* .......................................................................................................... 182
TTA1802*D* with TWE180B* .............................................................................................................. 183
TTA2402*D* with TWE240B* .............................................................................................................. 184
TTA1802*D with TWE180B .................................................................................................................. 185
TTA2402*D with TWE240B .................................................................................................................. 186
TWA Charging and Pressure Charts ......................................................................................................... 187
TWA0724*A with TWE0904*A ............................................................................................................. 188
TWA0724*A with TWE0904*A Pressure Curve ................................................................................... 189
TWA0724*D with TWE0904*B ............................................................................................................. 190
TWA0724*D with TWE0904*B Pressure Curve ................................................................................... 191
TWA0904*A with TWE0904*A ............................................................................................................. 192
TWA0904*A with TWE0904*A Pressure Curve ................................................................................... 193
TWA0904*D with TWE0904*D ............................................................................................................ 194
TWA0904*D with TWE0904*D Pressure Curve ................................................................................... 195
TWA1204*A with TWE1204*A ............................................................................................................. 197
TWA1204*A with TWE1204*A Pressure Curve ................................................................................... 198
TWA1204*D with TWE1204*D ............................................................................................................ 199
TWA1204*D with TWE1204*D Pressure Curve ................................................................................... 200
TWA1804*D with TWA1804*B ............................................................................................................ 202
TWA1804*D with TWA1804*B Pressure Curve ................................................................................... 203
TWA2404*D with TWA2404*B ............................................................................................................ 205
TWA2404*D with TWA2404*B Pressure curve ................................................................................... 206
TWA0902*A with TWE0902*A ............................................................................................................. 208
TWA1202*A with TWE1202*A ............................................................................................................. 209

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Control Box Layouts
Single Fan Condenser

Dual Fan Condenser

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Air Handler

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Symbio™ 700 Unit Controller (UC)

Main Unit Controller

Includes all IO required to control a base unit

Included as base controller on all Symbio™ Condensers.

The Symbio 700 controller provides a 2 X 16 backlit LCD display on the middle of the controller.

The onboard user interface includes a Bluetooth pair button to pair with the Symbio 700 controller for
use with the mobile service tool.

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Symbio™ 700 Unit Controller (UC) Troubleshooting Info

Note: J19-7 and J21-1 are current limited to 1.1 amp.

Note: J2 is not intended to charge mobile phones.

Be aware on of wire colors, for some reason Black is 24 VAC Hot and Red is 24 VAC Common.

24 VAC power for the board comes in on J4-1 & 2. This comes from the Adapter Board J2.

Plugs P7 (Condenser Fan Out) and P11 (SOV 1 & 2 Out) are powered from P6, which is powered from
either Adapter Board J1 or TNS2 on 10T, 20T DUAL TTA AND ALL TWA UNITS.

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Symbio™ 700 Unit Controller LEDS

LED Description Notes

• The LEDs for the internal relays along the right-hand side of the Symbio 700 board illuminate
a solid green color when the relay is energized. The description in the illustration has which
output is active.
• LED 3 – Bluetooth is on when Bluetooth is connected and flashes during pairing, otherwise,
it is off.
• LED 7 – Ethernet Activity light is for the Ethernet Port. The light will flash green whenever
there is network traffic.
• LED 8 – Ethernet Link light is also for the Ethernet Port. The light will be solid yellow
whenever the Symbio 700 board is connected to a router or network switch.
• LED 9 – System light is normally a solid light when power is applied and after the boot
sequence
• LED 10 – Alarm Status is normally off unless there is an active alarm then it will flash a red
light
• MODBUS TX/RX – Normally off unless the AHU is configured for SZVAV or multispeed.
When normally communicating with the VFD, both lights will pulse at the same time with
about a second in between flashes and a couple quick pulses every now and then.
• IMC TX/RX – Normally has very fast pulsing almost making the lights look just dim

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Symbio™ 700 Unit LED Functions

LED 1 – P7-1 (Black) SOLID ON=When output is on, OFF=When output is off
LED 2 – P7-3 (Black) SOLID ON=When output is on, OFF=When output is off
OFF = Bluetooth radio is not available
LED 3 – Bluetooth ON = Active Bluetooth connection in process
BLINKING = Controller is waiting for a Bluetooth connection
LED 4 – P7-5 (Black) SOLID ON=When output is on, OFF=When output is off
LED 5 – P8-5 (Red) SOLID ON=When output is on, OFF=When output is off
LED 6 – P8-6 (Red) SOLID ON=When output is on, OFF=When output is off
SOLID ON = When link is connected
LED 7 – Ethernet
OFF = When link is disconnected
LED 8 – Ethernet BLINKING = Activity on link, OFF = No activity on link
SOLID GREEN = All objects in a normal state
LED 9 – System
OFF = Controller not powered or is in an alarm condition
BLINKING RED = At least one object is in a not normal state
LED 10 – Alarm Status
OFF = Controller not powered or is in a normal state
LED 11 – Modbus RTU Link
(VFD) TX BLINKING GREEN = when Modbus data is sent
LED 12 – Modbus RTU Link
(VFD) RX BLINKING YELLOW = when Modbus data is received
LED 13 – IMC (Options board) IMC Link TX BLINKING GREEN = when IMC data is sent
LED 14 – IMC (Options Board) IMC Link RX BLINKING YELLOW = when IMC data is received
LED 15 – P9-5 (White) SOLID ON=When output is on, OFF=When output is off
LED 16 – P9-6 (White) SOLID ON=When output is on, OFF=When output is off
LED 17 – P10-5 (Blue) SOLID ON=When output is on, OFF=When output is off
LED 18 – P10-6 (Blue) SOLID ON=When output is on, OFF=When output is off
LED 19 – P11-1 (White) SOLID ON=When output is on, OFF=When output is off
LED 20 – P11-3 (White) SOLID ON=When output is on, OFF=When output is off
LED 21 – P5-2 SOLID ON=When output is on, OFF=When output is off
LED 22 – P5-4 SOLID ON=When output is on, OFF=When output is off
LED 23 – BACnet MS/TP Link RX BLINKING YELLOW = when BACnet data is received
LED 24 – BACnet MS/TP Link TX BLINKING GREEN = when BACnet data is received

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Symbio 700 Factory Connections

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Symbio 700 Field Connections

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Odyssey Adapter Board

Electrical Integration board with a series of connectors and traces

Eliminates complex harness designs associated with equipment protection features, enables proper
power distribution between components in the condenser, and provides connection points between
Condenser and Air Handler

Included in all Odyssey Symbio™ Condensers.

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J1-1 Connected to J5-1 by trace J7-1 Connected to J13-4 by trace

J1-2 Connected to eyelet ground by trace J7-2 Connected to eyelet ground by trace

J7-3 Connected to J11-4 by trace

J2-1 Connected to J5-1 by trace J7-4 Connected to eyelet ground by trace

J2-2 Connected to eyelet ground by trace J7-5 Connected to J9-4 by trace

J7-6 Connected to eyelet ground by trace

J3-1 Connected to J15-1 by trace

J3-2 Connected to eyelet ground by trace J8-1 Connected to J20-18 by trace

J3-3 Connected to J15-3 by trace J8-2 Connected to eyelet ground by trace

J3-4 Connected to J15-4 by trace

J9-1 Connected to J20-17 by trace

J4-1 Connected to J16-1 by trace J9-2 Connected to J9-3 by trace

J4-2 Connected to J16-2 by trace J9-3 Connected to J9-2 by trace

J4-3 Connected to eyelet ground by trace J9-4 Connected to J7-5 by trace

J5-1 24VAC IN from transformer J10-1 Connected to J20-12 by trace

J5-2 24VAC COM IN (Connected to eyelet J10-2 Connected to eyelet ground by trace
ground by trace)

J11-1 Connected to J20-11 by trace

J6-1 Connected to J21-5 by trace
J11-2 Connected to J11-3 by trace
J6-2 Connected to eyelet ground by trace
J11-3 Connected to J11-2 by trace
J6-3 Connected to J21-7 by trace
J11-4 Connected to J7-3 by trace
J6-4 Connected to eyelet ground by trace

J6-5 Connected to J21-9 by trace

J12-1 Connected to J20-6 by trace
J6-6 Connected to eyelet ground by trace
J12-2 Connected to eyelet ground by trace

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J13-1 Connected to J20-5 by trace J19-1 Connected to J14-1 by trace

J13-2 Connected to J13-3 by trace J19-2 Connected to eyelet ground by trace

J13-3 Connected to J13-2 by trace J19-3 Connected to J14-3 by trace

J13-4 Connected to J7-1 by trace J19-4 Connected to eyelet ground by trace

J14-1 Connected to J19-1 by trace J20-1 Connected to J5-1 by trace

J14-2 Connected to eyelet ground by trace J20-2 From Symbio 700 P8-2

J14-3 Connected to J19-3 by trace J20-3 Connected to J22-2 by trace

J14-4 Connected to eyelet ground by trace J20-4 Connected to J5-1 by trace

J20-5 Connected to J13-1 by trace

J20-6 Connected to J12-1 by trace

J15-1 Connected to J3-1 by trace J20-7 Connected to J5-1 by trace

J15-2 Connected to eyelet ground by trace J20-8 From Symbio 700 P9-2

J15-3 Connected to J3-3 by trace J20-9 Connected to J22-4 by trace

J15-4 Connected to J3-4 by trace J20-10 Connected to J5-1 by trace

J20-11 Connected to J11-1 by trace

J16-1 Connected to J4-1 by trace J20-12 Connected to J10-1 by trace

J16-2 Connected to J4-2 by trace J20-13 Connected to J5-1 by trace

J16-3 Connected to eyelet ground by trace J20-14 From Symbio 700 P10-2

J20-15 Connected to J22-6 by trace

J17-1 Connected to J21-4 by trace J20-16 Connected to J5-1 by trace

J17-2 Connected to eyelet ground by trace J20-17 Connected to J9-1 by trace

J20-18 Connected to J8-1 by trace

J18-1 Connected to J21-2 by trace

J18-2 Connected to eyelet ground by trace

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J21-1 Connected to J5-1 by trace

J21-2 Connected to J18-1 by trace

J21-3 Connected to J5-1 by trace

J21-4 Connected to J17-1 by trace

J21-5 Connected to J6-1 by trace

J21-6 Connected to eyelet ground by trace

J21-7 Connected to J6-3 by trace

J21-8 Connected to eyelet ground by trace

J21-9 Connected to J6-5 by trace

J21-10 Connected to eyelet ground by trace

J22-1 Connected to J5-1 by trace

J22-2 Connected to J20-3 by trace

J22-3 Connected to J5-1 by trace

J22-4 Connected to J20-9 by trace

J22-5 Connected to J5-1 by trace

J22-6 Connected to J20-15 by trace

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Troubleshooting the Compressor Circuit(s)
Circuit 1
Compressor 1 run command from UC P8-5 to Adapter Board J20-5.

Then to Adapter Board J13-1 by board trace.

Out to the HPC and back to Adapter Board J13-2.

Then to Adapter Board J13-3 by board trace.

Out to DTL and back to the Adapter Board J13-4.

Then to Adapter Board J7-1 by board trace, then out to CC1 coil.

The Proving Circuit is J5-1 to J22-1 through the Aux switch, to J22-2 then to J20-3.

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Circuit 2
Compressor 2 run command from UC P9-5 to Adapter Board J20-11.

Then to Adapter Board J11-1 by board trace.

Out to the HPC and back to Adapter Board J11-2.

Then to Adapter Board J11-3 by board trace.

Out to DTL and back to the Adapter Board J14-4.

Then to Adapter Board J7-3 by board trace, then out to CC2 coil.

The Proving Circuit is J5-1 to J22-3 through the Aux switch, to J22 -4 then to J20-9.

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Compressor Control Circuit Troubleshooting Tips - derived from bench testing.

If either the HPC or DTL opens while the compressor is running, the Compressor Contactor will lose its
24 vac and the Aux Switch will open, causing the Symbio Board to generate a “Compressor Proving Trip
Diagnostic” – 15 minute lockout -

If the HPC and or the DTL are open when the Symbio Board energizes the Compressor Contactor and the
Contactor Aux switch doesn’t close, the Symbio Board to generate a “Compressor Proving Lockout
Diagnostic” – INSTANT UNIT LOCKOUT! -

If the Aux Switch is bad (or is off the Contactor) the Compressor Contactor will pull in for 7 seconds and
drop back out, causing the Symbio Board to generate a “Compressor Proving Lockout Diagnostic” –
INSTANT UNIT LOCKOUT! –

If the Compressor Contactor Aux Switch closes before it is supposed to (for example if the technician
pushes in the contactor manually) the Symbio Board will generate a “Compressor Contactor Fail
Diagnostic” – INSTANT UNIT LOCKOUT! -

A good way to find out if the pressure switches or the board / wiring is the issue on a “Compressor
Proving Trip Diagnostic” unwire the line voltage from the compressor and then have the Symbio Board
turn on the circuit in question.

The LPC appears to follow Reliatel Logic.

If the outdoor temperature is less than 40ºF the LPC bypass delay will be set to 60 seconds.

When the outdoor temperature is between 40 to 49.9°F the delay will be set to 30 seconds.

For all outdoor temperatures 50°F and above, there will be no delay.

Refrigeration Circuit Management

Configured to Manifolded- both compressors disabled if protection device in either circuit opens

Configured to Independent- only the affected compressor is disabled if protection opens.

Below is the Official Sequence of Operation

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Compressor Protection – (HPC, DTL or Aux switch proving trip)
Compressor protection operates similar to Reliatel-based solutions, with some minor changes/additions.

In most cases, action is taken on a per-circuit basis, but often we have protection devices per
compressor.

Each compressor output will have a corresponding Compressor Proving input, which will be monitored
to determine the state of the compressor contactor (via Auxiliary switch). Depending on the state of the
contactor relative to the compressor output command, the following diagnostics will be generated:

Compressor “X” Proving Trip & Lockout

When a Compressor Output is Commanded ON, and it has been running for more than 5 seconds, if its
associated Proving input OPENs:

All compressor outputs on the circuit will shut down immediately.

The “Compressor X Proving Trip” diagnostic point will be annunciated.

The Compressor’s Proving Trip counter will be incremented.

The circuit will be disabled for 15 minutes.

After 15 minutes the circuit will attempt to restart

Two cases can cause a “Circuit X Proving Lockout” event:

If a circuit accumulates 4 “Compressor X Proving Trips” during the same compressor operating sequence
(cooling, heating, etc.), a “Compressor X Proving Lockout” will be generated.

At compressor startup, if its associated proving input does not CLOSE within 5 seconds, a “Compressor X
Proving Lockout” will be generated.

Once the “Lockout” has occurred the circuit will be locked out until a Diagnostic Reset is initiated

Compressor X Contactor Failure (Manual Reset)

If a Compressor Proving input becomes “Active” for 5 continuous seconds when the associated
Compressor Command output is Inactive, a “Compressor X Contactor Failure” diagnostic will be
generated; all compressors on the associated circuit will be de-energized immediately and they will be
locked out and the “Compressor X Contactor Failure” diagnostic point will be activated.

Once the Contactor Failure has occurred the circuit will be locked out until a Diagnostic Reset is initiated.

31
Compressor Protection – Low Pressure Cutout Control
For each compressor/circuit, a Normally CLOSED low pressure cutout input will be monitored for
equipment protection on the Symbio 700. When a low pressure event is active, the input will become
OPEN and diagnostics will be generated as described below.

Prior to Compressor Startup:

If a compressor output is Off and its circuit’s LPC input is open, compressor operation will not be
inhibited. After compressor startup, the sequence described in the section below will be honored.

After Compressor Startup:

An LPC Bypass Delay function will delay the setting of a low pressure cutout after compressor startup on
a circuit until a pre-determined amount of time passes in low ambient conditions. The length of the
delay will be determined based on ambient temperature:

Outdoor Air Temperature Active < 40°F, the LPC Bypass Delay will be set to 60 seconds

50°F > Outdoor Air Temperature Active ≥ 40°F, the LPC Bypass Delay will be set to 30 seconds

Outdoor Air Temperature Active ≥ 50°F, the LPC Bypass Delay will be 0 seconds

After the LPC bypass timer has expired, following diagnostics will be generated based on the low
pressure cutout inputs for the unit

Circuit X LPC Trip (Auto-Reset):

For Cooling Only Units or Heat Pumps in Active Cooling:
If a compressor low pressure cutout input opens:

All Compressor Outputs on the effected circuit will be immediately Commanded OFF.

The “Circuit X LPC Trip” diagnostic point will be annunciated.

The Circuit will be disabled for 3 minutes.

The Circuit’s LPC trip count will be incremented.

After the 3 minute low pressure event timeout has expired, if the unit is not under a

Circuit Lockout” event:

The “Circuit X LPC Trip” diagnostic will be reset

If the cooling stage is still requested ON, the circuit will be allowed to stage again.

If the Circuit runs for 3 minutes, its LPC Trip Count will be reset to 0 .

32
For Heat Pump Units in Active Mechanical Heating and Outdoor Air Temperature ≥ 0°F
If a compressor low pressure cutout input opens:

All Compressor Outputs on the effected circuit will be immediately Commanded OFF.

The “Circuit X LPC Trip” diagnostic point will be annunciated.

The Circuit will be disabled for 3 minutes.

The Circuit’s LPC trip count will be incremented.

On Heat Pumps, if the Outdoor Air Temperature is < 0°F or if the unit is in active Defrost, the low
pressure cutout diagnostic is ignored. This is to allow a heat pump to continue to provide heating
capacity at low ambient conditions.

After the 3 minute low pressure event timeout has expired, if the unit is not under a “Circuit Lockout”
event:

The “Circuit X LPC Trip” diagnostic will be reset

If the cooling stage is still requested ON, the circuit will be allowed to stage again.

If the Circuit runs for 3 minutes, its LPC Trip Count will be reset to 0.

Circuit “X” Low Pressure Lockout (Manual Reset)

If a compressor/circuit accumulates 4 “Circuit X Low Pressure Trips” without the circuit running for the
3-minute minimum on time (counter is not reset), a “Circuit X LPC Lockout” will be generated.

Once the lockout is generated the circuit will be locked out until a Diagnostic Reset is initiated.

33
Odyssey Relay Board

Electrical Integration board for Odyssey Air Handlers

Includes a set of connectors as well as onboard relay logic to manage variation associated with various
air-handler/condenser pairing solutions.

Board includes no microcontroller – hardware-based solution only

Eliminates complex harnesses and variation for end devices in the Odyssey air handler

Included in all Odyssey Symbio Air Handlers

Note: J5-2 is current limited to 300ma.

34
The Symbio Air Handler EDC Switch part number is CNT08144. (this switch is Demand Limit in the menu)

Switch is shipped in the Normally Open configuration, for Pairing with Electromechanical or Reliatel
Condenser, move wire from terminal “H” to terminal “L” on EDC Switch.

H-C – Device contacts CLOSE when temperature falls below 25F, OPEN when temperature rises above
60F.

L-C – Device contacts OPEN when temperature falls below 25F, CLOSE when temperature rises above
60F.

35
P1 is used will be on Air Handlers when Digit 15 in the Model Number is D

J5

J5-1 connects to J8-2 by a trace in the circuit board.

J5-2 is current limited to 300ma, Tech Support recommends not using this terminal for anything at this
time. Use J10-1.

24 VAC to J5-4 closes J11-1 to 2 and is the fan interlock to allow heat to work.

24 VAC to J5-5 does absolutely nothing

24 VAC to J5-6 closes J11-3 to 4

J5-7 connects to J1-1 by a trace in the circuit board

J5-8 connects to J1-3 by a trace in the circuit board

J6 - Some of the wiring diagrams are wrong for J6.

The diagram should be, J6-1 OUT to Unit B, J6-2 OUT to Unit A, J6-3 24 VAC IN.

When 24 VAC is applied to J6-3, the K5 and K7 relay will close outputting 24 volts from J6-1 and 2.

P9 is used on Air Handlers when Digit 15 in the Model Number is 1

J11 is used on Air Handlers when Digit 15 in the Model Number is C

36
Odyssey Options Board – BAYMODU001

Optional expansion IO module

Multiple instances can be installed with unique addresses, but only the Indoor Options Board is
supported for Odyssey at launch.

Required for SZVAV/Multi-Speed Symbio Air Handlers and Electric Heat systems when paired with a
Symbio ODU

Included/added in Odyssey AHU’s

37
Indoor Options Module Factory Connections

38
J11 Options Module Addressing - future

39
40
Indoor Options Module Communication Troubleshooting

Options Board com voltage is 4.5 to 3.25 VDC, pulsing 30 times a minute.

A meter will not show a difference if the field wires are crossed.

41
42
Adding Electric Heat to a Symbio Air Handler paired with a Symbio Condenser

Set the Options Board address to 75.

Power up.

Add Electric Heat in the Symbio 700 Configuration by using one of the methods below.

Using the On-Board menu

Go to Home, Utilities, Edit Configuration, Primary Heat for TTA’s, Secondary Heat for TWA’s.

Using the Phone App

Go to View Configuration, EDIT, Primary Heat for TTA’s, Secondary Heat for TWA’s.

If the Options Board was powered up before setting the address, do an IMC Reset with the Phone App.

Go to Service, IMC Link Reset

43
Electric Heat Adapter Harnesses

43675836 – Symbio Adapter Harness (WIR10632)

43675837 – Legacy Adapter Harness (WIR10690)

If you have a Symbio Condenser Paired with a Legacy Air Handler, don't set up the Symbio UI for electric
heat because you will get an Options Board Comm Fail.

The Relay Board, (which would be in a Symbio 2-Speed Air Handler designed to be paired with a EM
Condenser) has a fan interlock built in for electric heat, if you give it 24 vac on J5-7 only, the heat relay
clicks but there is no 24 vac output from J3-1, if you give it a G (J5-4) + W1 (J5-7) you get 24 vac out of
J3-1.

Two status LEDS will light up on the Options Board if there is a request for electric heat from the Symbio
700 UC, K1 is 1st stage, K2 is 2nd stage.

44
Electric Heat Wiring Diagrams

45
Phase Monitor
Phase monitors are installed on all 5 to 25 ton products with three-phase power.

The main purpose of the phase monitor is to ensure that the scroll compressors are rotating in the
proper direction.

A green LED on the phase monitor indicates proper phasing.

If the input leads are crossed, the phase monitor will sense this and will immediately shut the unit down.

The monitor will illuminate a red LED indicating a phase reversal condition.

If the control wires are crossed on the Y and Y-out terminals on the phase monitor, this will also cause
the red LED to illuminate and will not allow the unit to run.

If a red LED is displayed, swap two leads on the incoming power to the unit. If the red LED is still

illuminated, check for proper control wiring connections to the phase monitor.

If all wiring is correct, the phase monitor is defective and needs to be replaced.

46
Phase Monitor Wire Connections

47
Emergency Stop

Connect a Normally Open field supplied control device to the Symbio 700 (UC) J18-1 & 2.

Unit will shut down when switch is closed.

48
Supply Air Tempering

Supply Air Tempering Operation

If the Supply Air Tempering function is configured and the Discharge Air Temperature local sensor is
valid, the Space Temperature Control algorithm manages the Supply Air Tempering function to prevent
excessively cold discharge air from being supplied from the unit. The sequence for VVZT systems are
consistent with CVZT systems, utilizing single-speed, and full airflow operation.

Supply Air Tempering is not applicable when a Conventional TStat is configured as the Space
Controller.

The following requirements must be met to allow Supply Air Tempering on a Staged Heat unit:
• The supply fan is ON.
• The unit is in Occupied mode.
• The unit is in any heating mode, including Heat, Emergency Heat, Morning Warmup, Max
Heat but is not actively heating OR
• The unit is in any cooling mode except night purge, but not actively cooling and cooling
capacity has been OFF for 5 minutes.

If the discharge air temperature drops to the Discharge Air Temperature Minimum Cool Limit -
Active and the Space Temperature is less than the Active Space Temp Cooling Setpoint Status –
0.5°F and if there are no stages of heat on, the Supply Air Tempering function will bring ON one
stage of available staged auxiliary heat.

Note: Heat Pump units will energize 1 stage of auxiliary Heat in order to meet the Supply Air
Tempering request; compressor-based heating will not be used to satisfy Supply Air Tempering.

Once Supply Air Tempering is active, the stage of heat will be turned OFF if the Discharge Air
Temperature rises to 10°F ABOVE the Discharge Air Temperature Minimum Cool Limit - Active,
or the Space Temperature rises to the Space Temp Cooling Setpoint Status. Additionally, if the
Space Heat Control function determines that 1 or more stages of Heat are required to meet the
Space Temp Heating Setpoint Status, Tempering will be discontinued, and the unit will stage
heating to meet the current space demand.

49
Heat Pump Heating Lockout
On Heat Pump systems, the user will be able to select a Heat Pump Heating Lockout Setpoint to
determine a low outside air temperature limit for heat pump heating operation.

There is no enable/disable switch for this function. By default, the Heat Pump Heating Lockout Setpoint
will be set to -40F, which essentially disables this function. If a user wants to take advantage of this
feature, the recommendation will be to raise the Heat Pump Heating Lockout Setpoint to an appropriate
lockout point for the application.

The function operates as follows:

When the Outdoor Air Temperature Active ≤ Heat Pump Heating Lockout Setpoint –
Active:
Compressor outputs for heating will be disabled after the minimum ON time has expired. Auxiliary
Heating, if configured, will be used to satisfy a heating demand.

If compressors were not ON before this function became active, compressors will be prevented from
operating for heating operation.

Auxiliary Heating, if configured, will be used to satisfy a heating demand

When the Outdoor Air Temperature Active > Heat Pump Heating Lockout Setpoint –
Active + 5F:
Compressor Outputs for heating will be re-enabled for heating operation

Auxiliary Heating, if configured, will be allowed to de-energize or remain energized in order to satisfy the
current heating demand.

When the Outdoor Air Temperature Active point is in Alarm:

The Heat Pump Heating Lockout function will be disabled.

Compressor Outputs, if available, will be used to satisfy heating demands.

50
Symbio 700 Demand Defrost Operation - derived from bench testing
First Defrost permit conditions after Power Up.
30 minutes run time with the Outdoor Air Temp less than 52° and the Outdoor Coil Temp less than 33°.

Subsequent Defrosts permit conditions.

Outdoor Air Temp less than 52°, Outdoor Coil Temp less than 33°, The New Initiate DT Value is reached.

To view the sensor temperatures using the Symbio 700 On-Board User Interface

Press Home, Down Arrow to Status

Press the Check Mark, then Down Arrow to System (for outdoor temp) or Refrigeration (for coil temp)

Press the Check Mark, then Down Arrow to “Outdoor Air Temperature Arbitrator” or “Coil Temperature
Sensor”.

Sequence of Operation
The first defrost after a power cycle will occur after 30 minutes of run time under defrost permit
conditions.

When the first defrost cycle has terminated, the board will track twelve (12) minutes to assure that a dry
coil condition has been achieved.

At the twelve-minute point, a Dry Coil Temperature Differential (DCTD) will be calculated using the
current values of OAT (outdoor air temp) minus OCT (outdoor coil temp).

Note: The OAT is expected to be higher than the OCT.

The (DCTD) value is then multiplied by 1.8 to calculate the New Initiate DT Value.

Once the New Initiate DT Value is reached, the next defrost cycle is initiated.

Defrost Termination
The defrost cycle is terminated when the Outdoor Coil Temperature (OCT) exceeds the Outdoor
Temperature (ODT) +47°F.

The defrost termination temperature (DTT) will be limited between 57°F and 72°F.

51
Defrost Cycle Example
12 minutes after exiting the first defrost cycle (after power-up) the OD Air temperature is 40° and the
OD coil temperature is 30° (a 10° differential).

When the differential reaches 18° (10° X 1.8) the next defrost cycle should begin.

The unit runs for 45 minutes at OD Air temperature 40° and OD Coil temperature 30° without initiating
defrost. (this is correct operation because the OD Air to OD Coil differential is not 18°)

Lowered the OD coil temp. to 22° and defrost initiated. (40° OD Air - 22° OD Coil = 18° differential)

Raised the OD coil temp. to 72° and unit exited defrost. (40° + 47° limited to 72°)

Readjusted the OD Air temperature to 40° and the OD Coil temperature to 30° so the board would again
see a 10° differential 12 minutes after exiting defrost.

15 minutes after the previous defrost ended raised the OD Air temperature to 48° and defrost initiated.
(48° OD Air – 30° OD Coil = 18° differential)

Independent Circuit Defrost Operation

For Odyssey Independent Circuit Heat Pump units with two outdoor coil temperature

sensors, the unit will perform defrost per circuit based on its own coil temperature sensor value,

the outdoor ambient temperature, and the accumulated circuit run time.

A stage of auxiliary heat will be energized anytime either circuit is in defrost mode.

All other defrost functionality, including the diagnostic conditions, will perform as described above
independently per circuit.

Default Mode
If any Defrost Fault is active, the unit will revert to the default mode any time the unit is in the active
heat mode with compressors running.

If Both the Outdoor Air Sensor and the Coil Temperature Sensor fails, the unit will revert to the default
mode any time the unit is in the active heat mode with compressors running.

If Either the Outdoor Air Sensor or the Coil Temperature Sensor fails, the unit will revert to the default
mode if the other sensor is below the Defrost Permit Temperature.

Default Mode is 5-minute defrost cycle after each 30 minutes of cumulative compressor heating
operation.

Below is the Official Sequence of Operation

52
Condenser Defrost (Heat Pumps Only)
Demand Defrost Control
The Symbio 700 Demand Defrost sequence matches the sequence on Reliatel controls, with the
exception of changes in diagnostic names:

Outdoor coil defrosting occurs only when operating in heating mode with outdoor ambient temperature
below 52°F and the outdoor coil temperature below 33°F.The first defrost cycle after power-up is
initiated based on operating time at the required conditions. Shortly after completion of the defrost
cycle, the temperature difference between the outdoor coil and outdoor air is calculated and is used as
an indicator of unit performance at dry coil conditions.

Over time, as moisture and frost accumulate on the coil, the coil temperature will drop, increasing the
temperature difference. When the temperature difference reaches 1.8 times the dry coil temperature
differential (ΔT), a defrost cycle is initiated. While defrosting, the switchover valve is in the cooling
position, outdoor fans are off, and the compressors continue to operate.

The defrost cycle is terminated when the coil temperature rises high enough to indicate that the frost
has been eliminated. Termination of the defrost cycle includes a “soft start” delay. At the end of each
defrost cycle, the outdoor fan comes on 5 seconds before the switchover valve is de-energized. This
reduces stress on the compressor and makes for a quieter defrost.

During the defrost cycle, a stage of auxiliary heat is turned ON if not already operating.

The defrost cycle is terminated based on the termination temperature calculation using the outdoor
temperature (OAT) +47°F. The defrost termination temperature (DTT) will be limited between 57°F and
72°F.

53
54
Temperature Sensors (NTC) F °C (K ohms) DCV
F °C (K ohms) DCV 1 -17.22 84.537 2.234
200 93.33 345.684 Open 2 -16.67 81.868 2.227
-39 -39.44 333.237 2.426 3 -16.11 79.291 2.219
-38 -38.89 321.274 2.423 4 -15.56 76.802 2.211
-37 -38.33 309.777 2.420 5 -15.00 74.403 2.202
-36 -37.78 298.724 2.417 6 -14.44 72.087 2.194
-35 -37.22 288.097 2.414 7 -13.89 69.849 2.186
-34 -36.67 277.879 2.412 8 -13.33 67.687 2.177
-33 -36.11 268.053 2.408 9 -12.78 65.597 2.168
-32 -35.56 258.603 2.405 10 -12.22 63.577 2.159
-31 -35.00 249.523 2.402 11 -11.67 61.624 2.150
-30 -34.44 240.81 2.399 12 -11.11 59.737 2.140
-29 -33.89 232.425 2.395 13 -10.56 57.913 2.131
-28 -33.33 224.355 2.392 14 -10.00 56.153 2.121
-27 -32.78 216.59 2.388 15 -9.44 54.452 2.111
-26 -32.22 209.114 2.384 16 -8.89 52.807 2.101
-25 -31.67 201.918 2.380 17 -8.33 51.216 2.090
-24 -31.11 194.991 2.376 18 -7.78 49.677 2.080
-23 -30.56 188.32 2.372 19 -7.22 48.188 2.069
-22 -30.00 181.904 2.368 20 -6.67 46.748 2.058
-21 -29.44 175.738 2.364 21 -6.11 45.354 2.047
-20 -28.89 169.798 2.359 22 -5.56 44.007 2.036
-19 -28.33 164.076 2.355 23 -5.00 42.705 2.025
-18 -27.78 158.562 2.350 24 -4.44 41.446 2.013
-17 -27.22 153.248 2.345 25 -3.89 40.226 2.001
-16 -26.67 148.127 2.340 26 -3.33 39.046 1.989
-15 -26.11 143.192 2.335 27 -2.78 37.904 1.977
-14 -25.56 138.435 2.330 28 -2.22 36.797 1.965
-12 -24.44 129.449 2.319 29 -1.67 35.726 1.952
-11 -23.89 125.199 2.314 30 -1.11 34.689 1.940
-10 -23.33 121.1 2.308 31 -0.56 33.686 1.927
-9 -22.78 117.146 2.302 32 0.00 32.72 1.914
-8 -22.22 113.331 2.296 33 0.56 31.797 1.901
-7 -21.67 109.652 2.290 34 1.11 30.903 1.888
-6 -21.11 106.102 2.283 35 1.67 30.037 1.875
-5 -20.56 102.676 2.277 36 2.22 29.198 1.861
-4 -20.00 99.377 2.270 37 2.78 28.386 1.848
-3 -19.44 96.197 2.263 38 3.33 27.599 1.834
-2 -18.89 93.127 2.256 39 3.89 26.836 1.821
-1 -18.33 90.163 2.249 40 4.44 26.097 1.807
0 -17.78 87.301 2.242 41 5.00 25.383 1.793

55
 (K (K
°F °C ohms) DCV °F °C ohms) DCV
42 5.56 24.69 1.779 81 27.22 9.03 1.186
43 6.11 24.018 1.764 82 27.78 8.815 1.171
44 6.67 23.367 1.750 83 28.33 8.607 1.156
45 7.22 22.736 1.736 84 28.89 8.404 1.142
46 7.78 22.123 1.721 85 29.44 8.206 1.127
47 8.33 21.53 1.706 86 30.00 8.014 1.112
48 8.89 20.953 1.692 87 30.56 7.827 1.098
49 9.44 20.396 1.677 88 31.11 7.645 1.083
50 10.00 19.854 1.662 89 31.67 7.468 1.069
51 10.56 19.33 1.647 90 32.22 7.295 1.055
52 11.11 18.821 1.632 91 32.78 7.127 1.040
53 11.67 18.327 1.617 92 33.33 6.963 1.026
54 12.22 17.847 1.602 93 33.89 6.803 1.012
55 12.78 17.382 1.587 94 34.44 6.648 0.998
56 13.33 16.93 1.571 95 35.00 6.497 0.985
57 13.89 16.491 1.556 96 35.56 6.35 0.971
58 14.44 16.066 1.540 97 36.11 6.207 0.958
59 15.00 15.654 1.525 98 36.67 6.067 0.944
60 15.56 15.253 1.510 99 37.22 5.931 0.931
61 16.11 14.864 1.494 100 37.78 5.798 0.918
62 16.67 14.486 1.479 101 38.33 5.668 0.905
63 17.22 14.119 1.463 102 38.89 5.543 0.892
64 17.78 13.762 1.448 103 39.44 5.42 0.879
65 18.33 13.416 1.432 104 40.00 5.3 0.866
66 18.89 13.078 1.416 105 40.56 5.184 0.854
67 19.44 12.752 1.401 106 41.11 5.07 0.841
68 20.00 12.435 1.385 107 41.67 4.959 0.829
69 20.56 12.126 1.370 108 42.22 4.851 0.817
70 21.11 11.827 1.354 109 42.78 4.745 0.805
71 21.67 11.535 1.339 110 43.33 4.642 0.793
72 22.22 11.252 1.323 111 43.89 4.542 0.781
73 22.78 10.977 1.308 112 44.44 4.444 0.770
74 23.33 10.709 1.293 113 45.00 4.349 0.758
75 23.89 10.448 1.277 114 45.56 4.256 0.747
76 24.44 10.194 1.262 115 46.11 4.165 0.735
77 25.00 9.949 1.247 116 46.67 4.076 0.724
78 25.56 9.71 1.231 117 47.22 3.99 0.713
79 26.11 9.477 1.216 118 47.78 3.906 0.703
80 26.67 9.25 1.201 119 48.33 3.824 0.692

56
 (K (K
°F °C ohms) DCV °F °C ohms) DCV
120 48.89 3.743 0.681 161 71.67 1.659 0.356
121 49.44 3.665 0.671 162 72.22 1.629 0.351
122 50.00 3.589 0.661 163 72.78 1.599 0.345
123 50.56 3.514 0.651 164 73.33 1.57 0.344
124 51.11 3.442 0.641 165 73.89 1.541 0.340
125 51.67 3.371 0.631 166 74.44 1.512 0.329
126 52.22 3.302 0.621 167 75.00 1.485 0.324
127 52.78 3.234 0.611 168 75.56 1.458 0.319
128 53.33 3.169 0.602 169 76.11 1.432 0.314
129 53.89 3.104 0.593 170 76.67 1.406 0.309
130 54.44 3.041 0.583 171 77.22 1.38 0.304
131 55.00 2.98 0.574 172 77.78 1.356 0.299
132 55.56 2.919 0.565 173 78.33 1.331 0.294
133 56.11 2.861 0.557 174 78.89 1.308 0.290
134 56.67 2.804 0.548 175 79.44 1.284 0.285
135 57.22 2.748 0.539 176 80.00 1.261 0.281
136 57.78 2.693 0.531 177 80.56 1.239 0.276
137 58.33 2.64 0.523 178 81.11 1.217 0.272
138 58.89 2.587 0.514 179 81.67 1.196 0.268
139 59.44 2.536 0.506 180 82.22 1.174 0.263
140 60.00 2.486 0.498 181 82.78 1.154 0.259
141 60.56 2.438 0.491 182 83.33 1.133 0.255
142 61.11 2.39 0.483 183 83.89 1.113 0.251
143 61.67 2.343 0.475 184 84.44 1.094 0.247
144 62.22 2.298 0.468 185 85.00 1.076 0.244
145 62.78 2.253 0.460 186 85.56 1.057 0.240
146 63.33 2.21 0.453 187 86.11 1.038 0.236
147 63.89 2.167 0.446 188 86.67 1.02 0.232
148 64.44 2.125 0.439 189 87.22 1.003 0.229
149 65.00 2.085 0.432 190 87.78 0.986 0.225
150 65.56 2.044 0.425 191 88.33 0.969 0.222
151 66.11 2.006 0.418 192 88.89 0.952 0.218
152 66.67 1.967 0.412 193 89.44 0.937 0.215
153 67.22 1.93 0.405 194 90.00 0.92 0.211
154 67.78 1.894 0.399 195 90.56 0.905 0.208
155 68.33 1.859 0.392 196 91.11 0.89 0.205
156 68.89 1.823 0.386 197 91.67 0.875 0.202
157 69.44 1.789 0.380 198 92.22 0.86 0.199
158 70.00 1.756 0.374 199 92.78 0.846 0.196
159 70.56 1.723 0.368 200 93.33 0.831 0.193
160 71.11 1.691 0.362 Shorted or no
power 0

57
Zone Sensor Mode °F °C (K ohms) DCV
Volts DC Ohms System Fan 73 22.78 0.4416 0.766
+- 5% Rx1K Switch switch
72 22.22 0.4610 0.789
0.00 0.00 Short Short
71 21.67 0.4805 0.812
0.47 2.32 OFF AUTO
0.82 4.87 COOL AUTO 70 21.11 0.5000 0.834
1.09 7.68 AUTO AUTO 69 20.56 0.5195 0.855
1.30 10.77 OFF ON 68 20.00 0.5390 0.876
1.43 13.32 COOL ON 67 19.44 0.5584 0.896
1.54 16.13 AUTO ON
66 18.89 0.5779 0.916
1.65 19.48 HEAT AUTO
65 18.33 0.5974 0.935
1.84 27.93 HEAT ON
1.94 35.00 EM HEAT AUTO 64 17.78 0.6169 0.954

2.03 43.45 EM HEAT ON 63 17.22 0.6363 0.972

2.50 Open Open 62 16.67 0.6558 0.990
circuit circuit
61 16.11 0.6753 1.008
60 15.56 0.6948 1.025
Zone Sensor Setpoint 59 15.00 0.7142 1.042
°F °C (K ohms) DCV 58 14.44 0.7337 1.058
90 32.22 0.1106 0.249 57 13.89 0.7544 1.075
89 31.67 0.1301 0.288 56 13.33 0.7751 1.092
88 31.11 0.1495 0.325 55 12.78 0.7958 1.108
87 30.56 0.1689 0.362 54 12.22 0.8166 1.124
86 30.00 0.1884 0.397 53 11.67 0.8373 1.139
85 29.44 0.2079 0.430 52 11.11 0.8580 1.155
84 28.89 0.2273 0.463 51 10.56 0.8787 1.169
83 28.33 0.2468 0.495 50 10.00 0.8994 1.184
82 27.78 0.2663 0.526 49 9.44 0.9179 1.197
81 27.22 0.2858 0.556 48 8.89 0.9363 1.209
80 26.67 0.3053 0.585 47 8.33 0.9548 1.221
79 26.11 0.3247 0.613 46 7.78 0.9733 1.233
78 25.56 0.3442 0.640 45 7.22 0.9918 1.245
77 25.00 0.3637 0.667 44 6.67 1.0102 1.257
76 24.44 0.3832 0.693 43 6.11 1.0287 1.268
75 23.89 0.4026 0.718 42 5.56 1.0472 1.279
74 23.33 0.4221 0.742 41 5.00 1.0656 1.290
40 4.44 1.0841 1.301

58
Zone Sensor Info
The BAYSENS119 will not work on the Symbio 700

The BAYSENS924 will not work on the Symbio 700 you need a X13791009001 (BAYSENS800)

You also need a BACnet enabled Symbio 700 UC.

If the Odyssey condenser wasn't ordered with a BACnet enabled Symbio 700 UC, Model Number Digit 21
= 1, the only way to get it in the field at this time is to replace the Symbio 700 with a version that has
BACnet enabled (MOD03103)

BAYSENS800 wiring

59
BAYSENS135 / X13790886 / Wiring

Symbio 700
Feature
BAYSENS135* terminal block
Description
(J19) Position

Zone
1 1
Temperature
2.5 Volt
2 2
Common
Cool Setpoint 3 3
System / Fan
4 4
Mode
Heating Setpoint 5 5
COMM + N/A N/A
COMM - N/A N/A
S1 N/A N/A
S2 N/A N/A
Ground (24 VAC
10 6
Common)
24 VAC 11 7

60
Zone Sensor Averaging
When a large zone is being conditioned, it may not be easy to find one place that provides a good typical
room temperature all day long. By using multiple sensors, the average temperature can be sensed and
provide operation more acceptable for the zone.

The quantity of sensors in the sensing circuit is extremely important. The quantity must be a "squared"
number that allows them to be wired in series-parallel configuration. The resistance of the averaging
circuit must duplicate the resistance of a single sensor. The quantities in the averaging circuit will be 4,
9, 16 or etc. A 4-sensor circuit is typical. (Note: Operation with 2 or 3 sensors is not possible).

Space temperature averaging is accomplished by wiring the correct number of sensors as shown. The
fewest number of sensors required to accomplish space temperature averaging is four. See note below.

NOTE: A non-programmable sensor can be used as one of the sensors wired in series/parallel with the
others.
A programmable sensor cannot be used as one of the averaging sensors.

61
Remote Sensor Wiring
Using a BAYSENS108 and a BAYSENS077 as an example.

62
Additional Thermostat / Zone Sensor Info

On the Symbio 700 UC J19-7 and J21-1 are current limited to 1.1 amps.

On the Symbio Relay Board J5-2 is current limited to 300 ma.

Open voltage on sensors is 2.5 volts, divide Reliatel Values in half.

Open sensor and a shorted sensor reports 200°

If someone uses the BAYSENS109 or 110 they can’t hook up J19-6 & 7 to the Symbio because that is
now 24VAC and Common, J19-8, 9 and 10 are not present.

With a thermostat

On Symbio heat pumps, Y1 + W2...after a 3-minute delay for compressor(s) to come on the electric heat
comes on within 30 seconds

Symbio 700 (UC) Y1 + X2 nothing will run, not even the indoor fan.

Symbio 700 (UC) Y1 + W2 + X2 nothing will run, not even the indoor fan.

Y2 before Y1 – Circuit 1 on, Add Y1 after 3 minutes – Circuit 2 on, remove Y2 – Circuit 2 off, remove Y1 –
Circuit 1 off.

Y1 and Y2 together – Both compressors on together (5 seconds apart) the assumption is that the
thermostat manages inter-stage delays.

Symbio (UC) Heat Pump a W2 by itself will turn on heat.

Symbio Relay Board Y1 + Y2 + W1 + W2 will still activate the heat outputs.

63
Condenser Fan Rotation for Dual Fan Units

64
Condenser Fan Staging

-or-
Dual condenser fan - shared airstream manifolded (cooling only)

Dual condenser fan - independent airstream dual (cooling only and heat pump)

65
Compressor Staging

Cooling Only (Electric Heat) – CVZT & VVZT

Dual compressor cooling staging (manifold or independent)

Dual unloading compressor cooling staging (10 and 20 ton)

Heat Pump – CVZT & VVZT

Dual compressor cooling staging (manifold or independent)

66
Constant Volume/Multi-Speed Fan Space Temperature Control (CVZT)
Similar to the Reliatel control system, the Symbio 700 includes a single-loop (space temperature only)
control sequence.

The sequence is PI-based (proportional, integral) and strives to maintain space temperature within 1F of
the Active Cooling and Heating setpoints.

When Space Temperature Active > Space Temp Cooling Setpoint Status, the algorithm will begin
calculating a need for Cooling capacity to be energized.

When Space Temperature Active < Space Temp Heating Setpoint Status, the algorithm will begin
calculating a need for Heating capacity to be energized.

When Space Temp Heating Setpoint Status ≤ Space Temperature Active ≤ Space Temp Cooling Setpoint
Status:

The algorithm will begin calculating a reduction in need for any active Cooling or Heating capacity if ON

If no Cooling or Heating capacity is Active, Cooling and Heating capacity will remain Inactive

Space Temperature Recovery

If the Space Temperature gets 3F out of control (above cooling setpoint or below heating setpoint), a
recovery sequence will be initiated such that the controller will immediately request 1 stage of cooling
or heating to be ON.

Once a stage of cooling or heating is energized due to a space temperature recovery request, that stage
of capacity and any additional stages of capacity will revert to be under the normal PI control sequence.

Recovery will bring on a stage of capacity, but the normal PI controller will be responsible for
maintaining the active capacity once energized.

Supply Fan Control

The supply fan will be controlled “ON” 5 seconds before heating or cooling capacity is energized. When
heating or cooling capacity is de-energized, a supply fan off delay will be applied based on active
capacity.

For Single-Speed supply fan configured systems, the supply fan will be controlled “ON” during all cooling
and heating sequences.

For Multi-Speed supply fan configured systems, the fan will operate per the following:

Low Speed when the Supply Fan is ON without Active Capacity (unless ON due to an override function)

Low Speed when the unit is operating at its minimum cooling stage

High Speed when the unit is operating at its maximum cooling stage, or while any heating stages are
active.

67
Constant Volume/Multi-Speed Fan Space Temperature Control (CVZT) Chart

68
Variable Volume Fan Space Temperature Control (SZVAV/VVZT)
Similar to the Reliatel control system, the Symbio 700 includes a Single Zone VAV (VVZT) control
sequence.

When configured for VVZT control, this sequence is only applicable when the following are true;
otherwise, the CVZT sequence is leveraged:

Occupancy Status = Occupied

Supply Fan Configuration Status = Continuous

Discharge Air Temperature sensor is not in an Alarm state

The unit is operating under a cooling demand (SZVAV heating is not applicable with staged heat on initial
launch of Symbio 700 for Odyssey)

The sequence is PI-based (proportional, integral) and strives to maintain space temperature within 1F of
the Active Cooling and Heating setpoints.

When Space Temperature Active > Space Temp Cooling Setpoint Status, the algorithm will begin
calculating a need for Cooling capacity to be energized. A discharge air temperature setpoint will be
calculated lower in order to determine proper compressor staging needs.

When Space Temperature Active < Space Temp Cooling Setpoint Status, the algorithm will begin
calculating a reduction in need for Cooling capacity to be energized. A discharge air temperature
setpoint will be calculated higher in order to determine proper compressor staging needs.

Different from the CVZT sequence, compressors will be staged to maintain the discharge air
temperature at the Discharge Air Temperature Setpoint Active setpoint.

Supply Fan Control

In order for the VVZT control sequence to be active, the Supply Fan Configuration Status must be
ON/Continuous.

The fan speed is continuously variable on VVZT systems. The fan will remain at minimum speed (based
on active compressor stages) until the space demand requires additional airflow.

All heating is accomplished with the CVZT control sequence, and the fan will be controlled at maximum
speed.

69
Variable Volume Fan Space Temperature Control (SZVAV/VVZT) Chart

70
VVZT DAT Control Mode
With the Symbio 700 VVZT control sequence, the end user will be able to choose to use the internally
derived Discharge Air Temperature Setpoint Active, or to override the value with their own. Use-cases
for this may include optimizing humidity control sequences per-application or to meet certain product-
level specifications.

If the VVZT DAT Control Mode – Active point is set to “Auto”, the VVZT control algorithm will use the
internally derived Discharge Air Temperature Setpoint Active, for all cooling capacity output control.

If the VVZT DAT Control Mode – Active point is set to “Manual”, the VVZT control algorithm will use the
Discharge Air Cooling Setpoint (Target) – Active as an upper limit for the Discharge Air Temperature
Setpoint Active calculation.

Example: Set to 50F, the unit will use 50F or lower discharge air temperature setpoint for all space
cooling demands.

When space temperature is 2F below cooling setpoint or 1F above heating setpoint, the controller will
suspend the discharge air setpoint active override to maintain space comfort until space temperature
recovers to above cooling setpoint.

Alternatively, the Discharge Air Maximum Cool Limit and Discharge Air Minimum Cool Limit can be set
equal to force the unit to use a constant discharge air temperature setpoint for cooling control.

While these overrides/sequences are not recommended for space comfort control, the control
sequence will support it.

71
Supply Fan Speed Control
At the initial launch of the Symbio 700 for Odyssey equipment, three supply fan types are supported:

Single-Speed, belt-driven fans

These fan types are controlled ON/OFF via a single binary output on the Symbio 700.

2-Speed & Variable Speed VFD-driven fans

These fan types are controlled via Modbus through a wired communication link (except for air-handlers
paired with non-Trane or legacy Electromechanical condensers)

At all times, a minimum fan speed will be maintained based on equipment design requirements.

Supply Fan Status Points

Single-Speed
Supply Fan Output Status - Indicates whether the fan is commanded ON or OFF

Supply Fan Speed Status - 0% when fan is OFF, 100% when fan is ON

VFD-driven
Supply Fan Output Status - Indicates whether the fan is commanded ON or OFF

Supply Fan Speed Status - Estimated active fan capacity from 0-100%. 0% = OFF, 100% = Maximum
Speed per application

Supply Fan Signal Command Status - Modbus signal command to VFD; 0% = Minimum Configured Drive
Speed, 100% = Maximum Configured Drive Speed

Status points will reflect accurately but can be impacted by VFD setup and setpoints.

Fan Setpoints with VFD-driven Fan Types

When a system is equipped with a VFD, the minimum and maximum VFD parameters can be adjusted to
tune the airflow to meet the application requirements.

In addition to this, the Symbio 700 supports setpoints that can be used to adjust airflow as needed:

Supply Fan Maximum Speed Setpoint

Range: 67-100%

Operation:

This setpoint “trims” the maximum fan speed, based on the configured maximum VFD speed

Example: VFD Max = 60Hz

Supply Fan Maximum Speed Setpoint @ 75% yields a maximum of 45Hz VFD output.

Effective VFD Max (to be used in Supply Fan Minimum Speed Setpoint application) will be set to 45Hz

72
Supply Fan Minimum Speed Setpoint
Range: 0-100%

Operation:

0-100% over minimum to effective maximum VFD configured fan speed

Example: VFD Min = 30Hz, Effective VFD Max = 60Hz

Supply Fan Minimum Speed Setpoint @ 50% yields 45Hz VFD output.

Minimum and Maximum Speed Setpoints interact to ensure that the minimum defined fan speed at a
given equipment operating condition is maintained.

Supply Fan Percentages

Multi-speed minimum supply fan speeds

Variable speed minimum supply fan speeds

73
Airflow Adjustments

Constant Volume Units

(Unit model number digit 15 = "1")

Adjust the motor sheave – close the sheave in for more fan RPM’s, open it for less.

2 Stage Airflow/Single Zone VAV (Symbio Cond Only)

(Unit Model Number Digit 15 = “D”)

Use the Symbio Phone App Settings, Indoor, Supply Fan Maximum Speed Setpoint and Supply Fan
Minimum Speed Setpoint

2 Stage Airflow (Electromechanical Cond Only)

(Unit Model Number Digit 15 = “C”)

For 2-Speed VFD controlled units the desired maximum air flow (High Speed) is set by reprogramming
parameter 6-15 on the VFD to the frequency value that best meets the RPM requirement as shown in
the catalog fan tables.

TR-150 Procedure

The Main Menu accesses all parameters.

1. Press the [Menu] key twice until indicator in display is placed above “Main Menu”.

2. Press [▼] to 6-** Analog In/Out

3. Press [Ok]

4. Press [▼] to 6-1* Analog Input 53

5. Press [Ok]

6. Press [▼] to 6-15 Terminal 53 High Ref. / Feedback Value

7.Press [Ok]

8. Press [▲] [▼] to set/change.

9.Press [Ok] to save changes.

10.Press [Back] until you get to the main screen.

74
Symbio TR-150 VFD Parameters

75
76
VFD Parameter Info
If 3-15 is set to Analog Input 53 (with a communicating VFD) the VFD will only run minimum speed.

If 8-01 is set to Digital (on a communicating VFD) the fan won't run and you get an Alarm on the Symbio
for Supply Fan Failure.

If 8-30, 32 or 33 is set wrong (on a communicating VFD) the fan won't run and you get an Alarm on the
Symbio for Supply Fan VFD Communication.

If you are in the UI and accidently change something to a value requiring a VFD (and you don’t have a
communicating VFD) you will get a diagnostic for VFD comm fail until you cycle power.

VFD Harness Part Numbers

Wire Harness, VFD Pigtail, Two Speed, PPF53 to VFD is WIR01085

Wire Harness, Supply Fan Controls, Two Speed, PPM53 to Relay Board P11 is WIR01090

VFD Faults requiring Manual Reset

Diagnostic: Supply Fan Failure
If while the Supply Fan VFD is requested to run, the VFD Running Status from the drive is set to False for
40 continuous seconds, this failure will be detected

All unit functions will be shut down immediately – Requires Manual Reset or Power Cycle

Supply Fan VFD Communication Status

If continual loss of communication between the controller and the VFD has occurred for a 30 second
period, this failure will be detected.

All unit functions will be shut down immediately – Requires Manual Reset or Power Cycle

77
TR150 VFD Communication Troubleshooting

If communication is normal, the Com LED on the VFD keypad will fast and slow flash.

Normal VFD com voltage 4.73 to 4.15 VDC pulsing approximately 10 times a minute, no pattern.

If the modbus wires are crossed between the Adapter Board and the Relay Board you get 4.39 VDC
steady, the Com LED on the VFD keypad will be on steady and you will get W-017 Ctrl.word TO on the
VFD keypad.

Example – 1 and 2 crossed, 1 and 3 crossed.

If the Symbio Board is not communicating with the VFD but the VFD kinda knows something is out there
the Com LED on the VFD keypad flashes once every 5 seconds.

For Example – If one of the modbus wires is open but the ground is intact it looks like the VFD can see
part of the Symbio Board, but the Symbio Board can’t see the VFD. In this scenario the VFD Com LED
would flash once every 5 seconds but NOT have a W-017 Ctrl.word TO, but the Symbio Board will show
VFD not communicating.

If all 3 of the field comm wires are open, you will get 4.95 VDC steady, the Com LED on the VFD keypad
will be off and you will get W-017 Ctrl.word TO on the VFD keypad.

78
79
Evaporator Defrost Control
Evaporator Defrost Control can be initiated through two means, based on configuration.

If configured for Evaporator Defrost Control = Enabled:

When the unit is operating in a “Cool” mode with a valid Outdoor Air Temperature, the EDC function will
keep track of the amount of time that at least one compressor in a unit is commanded ON and the
Outdoor Air Temperature Active is less than the low ambient temperature defined in table 3. If the
Accumulated Compressor On Time reaches 10 minutes, the EDC function will cause the Compressor
Output(s) to de-energize for three minutes. The supply fan continues to operate during this three-
minute interval at 100% capacity. After the three-minute EDC timer has expired, the EDC function is
ended and compressors are allowed to operate as requested by the algorithm.

Low Ambient Temperature Setpoints:

Single Compressor Systems – 55F

Multi-Compressor Systems – 40F

If configured for FroStat = Installed:

A FroStat input can also be used to directly request the Evaporator Defrost Control function

When the unit is running in an effective “Cool” mode, the FroStat input will directly control the FroStat
diagnostic. If the FroStat input CLOSES, the diagnostic will be annunciated.

When the unit is running in an effective “Heat” mode, and the Refrigeration System == Heat Pump, the
FroStat diagnostic will be controlled “Inactive” until the following are true:

FroStat input is CLOSED

One or More Compressors have been active for Heat Pump Heating for more than 30 seconds.

Once the above two conditions are met, the FroStat Diagnostic will become Active.

The FroStat diagnostic is an Auto-Reset diagnostic such that it will be reset when the FroStat input is
OPEN in either effecting unit mode.

If the FroStat diagnostic becomes active, the Compressor Output(s) will de-energize until the FroStat
diagnostic is cleared. The supply fan continues to operate during the FroStat diagnostic, so long as it is
still requested by a heating or cooling function.

FroStat and Evaporator Defrost Control can both be configured on a unit, although in most cases, only
one should be necessary.

Note: The actual EDC Switch on the Evaporator Coil is Demand Limit in the menu!

80
SYMBIO 700 Phone APP

81
Download the App!
Apple

Google Play

82
Symbio Service & Installation (mobile app) Overview
The Symbio 700 includes a built-in Bluetooth Low Energy (BLE) radio which is used to enable direct
access to the ‘Symbio Service and Installation’ Tool. No network connections are required as this
connection method enables a 1 to 1 connection between a single Symbio 700 and Mobile Phone that
meets the connection requirements.

Connection Requirements:
– Mobile Phone must have ‘Symbio Service and Installation’ Tool installed
– Mobile Phone must have Bluetooth (BLE) 4.2 or later (i.e. Samsung Galaxy S7 or newer, or Apple
iphone 6 or newer)

This is not information that can be read in the phones setting, if the Bluetooth version is pre 4.2 the
Symbio 700 won’t connect to the phone.
Bluetooth versions before 4.2 don’t meet Trane’s security needs.
Bluetooth version 5.0 increased connection speed and range (Samsung S8 and newer and iPhone X and
newer), note: the Symbio 700 uses Bluetooth 5.0.

– 4.2: 1 Mbps with a range of 10 meters

– 5.0: 2 Mbps with a range of 40 meters

Bluetooth Connection & Pairing

The Symbio Service & Installation Tool leverages built-in BLE security and device pairing processes.

To minimize opportunity for unauthorized access to the equipment, the following are leveraged as part
of the pairing process:

Unless previously connected, the BLE radio on the Symbio 700 is “OFF”; the Bluetooth LED will be OFF.

When a connection is desired, the user must “wake-up” the BLE radio on the Symbio 700 by pressing the
Bluetooth button on the user interface. At this time, the Bluetooth LED will begin flashing.

Numeric Passkey Pairing requires validation of a common 6-digit passkey on the Symbio 700 and Mobile
Phone before a successful connection can be made

Once the passkey is presented to the user on the Mobile Phone and on the Onboard UI for the Symbio
700, a confirmation must be made on both ends of the connection – by selecting “Pair” on the Mobile
Phone, and the “Enter” button on the Symbio 700.

Once the connection is validated, the user will have established a secure connection between their
Mobile Phone and the Symbio 700. The Bluetooth LED on the Symbio 700 will be solid ON.

The Symbio 700 will be included in the Bluetooth device list for the Mobile phone

Format is: Trane-<unit serial number> if there is a unit serial number otherwise
(/evox/config/unitData/serialNumber/)

This is set by the Factory.

Format is: Trane-<controller serial number> (/evox/about/hardwareSerialNumber/)

83
Once connected, the connection will remain until one of the following occurs:

The user initiates a “Disconnect” through the Onboard UI or Mobile Service Tool

The Mobile Service Tool is closed on the mobile device

Power is disconnected from the Symbio 700 or mobile device

Maximum Device Limit

Android devices will be limited to 10 Symbio 700s in the Bluetooth device list. Once this limit is reached,
the Mobile Service Tool App will prompt the user to remove a device before more connections can be
made.

iOS device Symbio 700 connections will be monitored through the Mobile Service Tool. After successful
connection to 10 Symbio 700s, the Mobile Service Tool will prompt the user to consider removing
devices from their Bluetooth device list before initiating a new connection. For iOS, the Mobile Service
Tool cannot force the user to remove a device, rather, only suggest it.

84
Login
Press Skip, go directly to the Unit List without logging in.

Apple Android

85
Unit List
Press the 3 dots in the upper right hand corner for About,
Preferences, EULA, Software Notices and Sign In (Preferences is for
Language and Units)

On the Unit List page, select the Symbio 700 controller that
you want to pair with. If the
controller is not listed, press the refresh arrow in the upper
right-hand corner of the screen.

When prompted, pair the app to the Symbio 700 controller. A

popup message displays a 6-digit random number. The same
number is shown on the display of the Symbio 700 controller
until the pairing is complete, allowing the user to confirm
connection to the intended controller.

Press the on the Symbio 700 on-board keyboard/display to complete the connection.

86
The Icons below are for the different screens

Android

HOME SETTINGS STATUS ALARMS TOOLS

Apple

HOME SETTINGS STATUS ALARMS TOOLS

87
HOME

Unit and controller information

The factory sets Equipment Serial Number and Model Number, these will be empty on replacement
boards

Unit data – this data is dynamic based on the hardware configuration

Firmware version, this is the software version of the Symbio 700

This page refreshes every 30 seconds, to manually refresh swipe down or press refresh

Odyssey Equipment Serial Number – Press SHOW MORE for

license information (Basic or Advanced)

88
on a zone sensor

Space Temperature Setpoint Active

Heat Secondary Capacity Status

Heating Capacity Primary Status

Supply Fan Speed Status %

Cooling Capacity Status %

Heat Cool Mode Status

Occupancy Status

Space Temperature Active

89
on a thermostat

Heat Secondary Capacity Status

Heating Capacity Primary Status

Supply Fan Speed Status %

Cooling Capacity Status %

Heat Mode Status

Thermostat G Input

Thermostat W1/O Input

Thermostat W2 Input

Thermostat X2 Input

Thermostat Y1 Input

Thermostat Y2 Input

90
SETTINGS

This page does not auto refresh, to manually refresh swipe down or
press refresh

View Configuration – EDIT

When the edit button is pressed the equipment will be stopped

All the values are green, select the one to change

When back button is pressed the editable hardware configuration

will be updated

The configuration won’t be applied to the controller at this time

There are hardware parameter inter interdependencies, when a

value is changed the dependencies from the current config will

be set in the editable hardware configuration

Manage Settings

Create Settings File will create a file that is saved on the phone which
contains all the settings points and their relinquish default value.

This is settings like Filter Runtime Hours Setpoint, Supply Fan

Maximum Speed Setpoint (vfd), Supply Fan Minimum Speed Setpoint
(vfd), Supply Fan Speed Command, Supply Fan Speed Command
Enable.

91
Load Settings can only be applied to a matching controller, the
matching criteria is the product name (/evox/about/productName/)

When loading a settings file it will write the relinquish default to all
the points that exist.
The details for each saved settings file can be viewed.
Edit lets you rename and delete a settings file.

92
Sometimes you will see this, just try again.

Important!
Be sure the units are exactly the same. Do not try to create a settings file from a SZVAV unit and load
them into a CV unit or vice versa.

We did this in Tech Support and almost bricked a Symbio 700 board.

93
View Configuration Sub-Menu
Equipment Configuration

System Type - VVZT/ CVZT (VVZT is SZVAV)

Refrigeration System – Cooling Only, Heat Pump

Refrigerant – R22, R410a

Voltage - 208/230 -60, 380/415-50, 380/60, 460/60, 575/60

Efficiency - Standard

Tonnage - R-22 - 7.5, 10, 15, 20, R-410A - 6, 6.25, 7.5, 8.33, 10, 12.5,
15, 20 (+ 25 for TTA)

Refrigeration Circuit – Single Dual

Indoor Fan Type – Single Speed, Multi Speed, Variable Speed

Variable Speed is the only option on VVZT

Space Controller – Conventional TStat, Single SP Zone Sensor, Dual SP

Zone Sensor

Evaporator Defrost Control – Enabled, Not Enabled

(Compressor off 3 min for 10 min runtime)

94
Heat

Primary Heating Source – Not Installed, Electric

Primary Heating Type - Staged

Primary Heating Stages – 1,2

Secondary Heating Source – Not Installed, Electric

Secondary Heating Type - Staged

Secondary Heating Stages – 1,2

Optional Devices

Ventilation Override – Installed, Not Installed

(On future Customer Module)

External Auto Stop – Installed, Not Installed

(On future Fresh Air Module?)

Frostat – Installed, Not Installed

On Indoor Options Module as HTL (a snap disc in the VFD enclosure)

Alarm Indicator - Installed, Not Installed

(On future Customer Module)

Demand Management – None, Demand Limit, Demand Shed

(Set to Demand Limit to use EDC Switch on Evap. Coil)

Humidity Sensor – Installed, Not Installed

95
CO2 Sensor – Installed, Not Installed

Supply Air Tempering – Enabled, Disabled

Discharge Air Sensor – Installed, Not Installed

96
Below * Indicates some Default Settings
Includes comments on some menu items

Any items value that is green can be overridden, this is a very

small list

All overrides are for 30 minutes and at priority 8 (not adjustable)

The override icon is

Purple a point is overridden at priority 8-16 (can be overridden)

Grey when a point is overridden at priority 1-7 (can’t be

overridden)

This page refreshes every 30 seconds, to manually refresh swipe

down or press refresh

97
CVZT TStat
CVZT ZS
VVZT ZS
VVZT TStat System
X X X X Arbitration Method Request Enable External / BAS Control,
*Standalone Control
X X X X Emergency Override BAS *Normal, Pressurize, Depressurize,
Purge, Shutdown
X X Heat Cool Mode Request Auto
X X Occupancy Request Auto
X X Occupied Bypass Time 120
X X Occupied Standby Cooling 78
Setpoint BAS
X X Occupied Standby Heating 67
Setpoint BAS
X X Space Cooling Setpoint High 90
Limit BAS
X X Space Cooling Setpoint Low 50
Limit BAS
X X Space Heating Setpoint High 80
Limit BAS
X X Space Heating Setpoint Low 50
Limit BAS
X X Supply Fan Configuration Continuous / Cycling
Command
X X Timed Override Request *Idle
X X X X Unit Stop Command Stop/*Auto
X X Unoccupied Cooling Setpoint 85
X X Unoccupied Heating Setpoint 60
X VVZT DAT Control Mode *Auto / Manual

98
TStat

TStat
CVZT
CVZT ZS
VVZT ZS
VVZT
Indoor
X X X X Filter Runtime Hours Setpoint *0
X X Supply Fan Maximum Speed 100%
Setpoint (vfd)
X X Supply Fan Minimum Speed 0%
Setpoint (vfd)
X X X X Supply Fan Speed Command *0%
X X X X Supply Fan Speed Command Enabled/*Disabled (you can run the fan
Enable here with no call)
X VVZT DAT Control Mode Manual/*Auto

Refrigeration
X Compressor Cooling P-Gain (%/F) 80%
X Compressor Cooling P-Gain-1 2%
(%/F)
X Compressor Cooling P-Gain-2 5%
(%/F)
X Compressor Cooling Reset Time 500 sec
X Compressor Cooling Reset Time 1000 sec
1
X Compressor Cooling Reset Time 80 sec
2
X X X X Cooling Capacity Enable default 100%
X X X X Cooling Capacity Setpoint BAS you can run the cooling here with no
call - default 0%
X X X X Cooling Capacity Setpoint Enable Enabled/*Disabled
BAS
X X X X Cooling Demand Limit Capacity Set to 0% for EDC Switch
Enable Setpoint
X X X X Cooling Lockout BAS Locked out / *Normal
X Discharge Air Cooling Setpoint 55
(Target)
X Discharge Air Temperature 104
Maximum Cool Limit
X Discharge Air Temperature 50 (DACR POT)
Minimum Cool Limit

99
CVZT TStat

CVZT ZS

VVZT ZS

VVZT TStat
Heat
X X Auxiliary Heating P - Gain (%/F) 80.00%
X X Auxiliary Heating Reset Time (seconds) 500 sec
X X X X Heat Lockout Command Locked out /
*Normal
X X X X Heat Primary Enable BAS default 100%
Heat Pump Heating Lockout Setpoint default -40
X X Heating Capacity Setpoint BAS default 0%
X X Heating Capacity Setpoint Enable BAS Enabled/*Disabled
X X X X Heating Demand Limit Capacity Enable default 100%
Setpoint
Supply Air Tempering Enable / *Disable

100
STATUS
Active

Cooling Capacity Enable - Active

Cooling Capacity Setpoint BAS - Active

Cooling Capacity Setpoint Enable BAS - Active

Cooling Demand Limit Capacity Enable Setpoint

Cooling Lockout BAS - Active

Demand Limit Request - Active

Discharge Air Cooling Setpoint (Target) Active

Discharge Air Temperature Maximum Cool Limit Active

Discharge Air Temperature Minimum Cool Limit Active

Discharge Air Temperature Setpoint Active

Emergency Override BAS - Active

Filter Runtime Hours Setpoint - Active

Heat Cool Mode Request Active

Heat Lockout Command - Active

Heat Primary Enable BAS - Active

Heat Pump Heating Lockout Setpoint - Active

Heating Capacity Setpoint BAS - Active

Heating Capacity Setpoint Enable BAS - Active

Heating Demand Limit Capacity Enable Setpoint - Active

Occupancy Request Active

Occupied Standby Cooling Setpoint BAS

Occupied Standby Heating Setpoint BAS

Space Temperature Cooling Setpoint Input Active

Space Temperature Heating Setpoint Input Active

Space Temperature Setpoint Active

Supply Air Tempering Enable active

Supply Fan Configuration Status

101
Supply Fan Maximum Output Frequency Status

Supply Fan Maximum Speed Setpoint - Active

Supply Fan Minimum Output Frequency Status

Supply Fan Minimum Speed Setpoint - Active

Supply Fan Speed Command - Active

Supply Fan Speed Command Enable - Active

VVZT DAT Control Mode Active

System

Alarm Indicator Status

Demand Limit Input

Demand Limit Request BAS

Override value *Not Limited

Override Duration *30 Minutes

Equipment Shutdown Input Status

Heat Cool Mode Status

Outdoor Air Temperature Active

Outdoor Air Temperature Arbitrator

Outdoor Air Temperature BAS

Override Value *0° F

Outdoor Air Temperature Local

Phase Monitor Status

Space Temp Cooling Setpoint Status

Space Temp Heating Setpoint Status

Space Temperature Active

Space Temperature Arbitrator

Space Temperature BAS

Space Temperature Cooling Setpoint Input

Space Temperature Heating Setpoint Input

102
Space Temperature Setpoint Active

Supply Air Tempering Status

System Mode Switch Input

System Mode Switch Local

Timed Override Input

Timed Override Status

Timed Override Timer Is Active

Thermostat G Input

Thermostat W1/O Input

Thermostat W2 Input

Thermostat X2 Input

Thermostat Y1 Input

Thermostat Y2 Input

Unit Stop Source

Indoor

Discharge Air Temperature Local

Filter Runtime Hours

Run Time - Supply Fan (Hours)

Starts - Supply Fan

Supply Fan Current

Supply Fan Power

Supply Fan Speed Command Status

Supply Fan Speed Status

Supply Fan Status

103
Refrigeration

Circuit 1 Defrost Status

Circuit 1 LPC Status

Circuit 2 Defrost Status

Circuit 2 LPC Status

Coil Temperature Sensor 1

Coil Temperature Sensor 2

Compressor 1 Command Status

Compressor 1 Proving Status

Compressor 2 Command Status

Compressor 2 Proving Status

Condenser Defrost Status

Condenser Fan 1 Command Status

Condenser Fan 2 Command Status

Cooling Capacity Status

Evaporator Defrost Status

Frostat Input

Refrigerant Type

Run Time - Compressor 1 (Hours)

Run Time - Compressor 2 (Hours)

Run Time Condenser Fan 1 (Hours)

Run Time Condenser Fan 2 (Hours)

Starts - Compressor 1

Starts - Compressor 2

Starts - Condenser Fan 1

Starts - Condenser Fan 2

Switchover Valve 1 Command

Switchover Valve 2 Command

104
Heat

Electric Heat Stage 1 Status

Electric Heat Stage 2 Status

Heat Secondary Capacity Status

Heating Capacity Primary Status

Run Time - Electric Heat Stage 1 (Hours)

Run Time - Electric Heat Stage 2 (Hours)

Starts - Electric Heat Stage 1 (Hours)

Starts - Electric Heat Stage 2 (Hours)

Custom

USB Port 1

105
ALARMS
Critical

Service Required

Advisory

Information

106
TOOLS

107
Service Test Mode
Default time to stay in a test mode is 60 minutes then the mode will
revert back to the Inactive State

This time can be changed in TU and on the on-board UI, cannot be

changed from the mobile app

Fan On

Cool 1

Cool 2

Heat 1

Heat 2

Heat 3

Heat 4

Defrost

Emergency Heat

108
Export Data Logs
This page will not be available on Units sold through the residential
channel.
The export data log functionality will create a CSV file each trend
and save it to the attached USB mass storage device.
Format is <Controller name>_trend_<name of point trended>.csv
When there is no USB device connected or an unsupported device
an error message will occur.
Depending on the size and number of trends this can a few
minutes.

109
Service

Service Sub-Menu

Diagnostics

Reset Diagnostics

Static Reset
Compressor 1 Run Time Reset

Compressor 1 Starts Reset

Compressor 2 Run Time Reset

Compressor 2 Starts Reset

Condenser Fan 1 Run Time Reset

Condenser Fan 1 Starts Reset

Condenser Fan 2 Run Time Reset

Condenser Fan 2 Starts Reset

Filter Timer Reset

Supply Fan Run Time Reset

Supply Fan Starts Reset

110
Modbus

Supply Fan VFD Communication Status

Options Modules

Customer Options Module Communication Status

Indoor Options Module Communication Status

On-Board I/O Communication Status

On-Board I/O Firmware Major Version

On-Board I/O Firmware Minor Version

Expansion Modules

111
IMC Link Reset

Use this if the address

was set wrong on the

Indoor Options Board, or the

Indoor Options Module is not

communicating.

112
IP Configuration

Host Name

Ethernet 1

Port State

Configure IP Address

Mac Address

IP Address

Subnet Mask

Default Gateway

DNS

Primary DNS Server

Secondary DNS Server

Tertiary DNS Server

Regional Specifications

Set automatically via this device

Time Zone

Time

113
Intelligent Services

Data Collection

Remote Access

Status

Test Connection

TGP2 Programs

114
Backup

Backup, Restore & Firmware Updates

The Symbio 700 supports the Backup and Restore Feature similar to
how other Trane UCs support the feature.

There are two instances of this feature for consideration:

Standard Backup & Restore

Backup

The Symbio 700 configuration and settings can be “backed-up” to a

file on a USB drive connected to the Symbio 700.

If a USB drive is connected to the Symbio 700, the “Backup”

process can be initiated through the Mobile Service Tool

Once Complete, a Backup (.tgx) file will be placed onto the USB
drive.

115
Restore
If a USB drive is connected to the controller, with a valid controller
“Backup” file installed, the user can initiate the “Restore” process
through the Mobile Service Tool

Restoring a Backup will apply all configuration and controller settings

from the “Backup” file to the controller.

When the restore is complete the user is disconnected from the

controller and taken to the unit list.

116
Restore To Factory Defaults (Baseline Backup)

At time of manufacture, a “Baseline Backup” of the Symbio 700 is

created. This backup contains the same information as a normal
backup but it can’t be removed from the controller and it can’t be
overwritten. The baseline backs are included in a backup file but will
only be restored onto a controller that doesn’t contain a baseline
backup.

The Baseline Backup is stored on the Symbio 700 and includes all
settings/configuration items at their values as manufactured.

The Baseline Backup can be restored through the Mobile Service Tool
and is intended to be used as a mechanism to restore the controller
to factory defaults.

Once initiated this process cannot be undone and should only be

used if a technician wants to completely “start-over” the setup of a
piece of equipment.

If a controller is replaced in the field, the replacement controller will

not have a baseline backup

Restore to factory defaults restores a baseline backup that is saved on the controller.

Baseline backups are created during the manufacturing process, replacement controllers will not have a
baseline backup.

When there isn’t a baseline backup the button will be greyed out.

When the baseline backup restore is complete the user is disconnected from the controller and taken to
the unit list.

117
Update Firmware
Scan For Firmware

Firmware Update
Similar to restoring a controller “Backup” file to the Symbio 700, the
user can initiate a Firmware Update from the Mobile Service Tool.

A valid firmware file must be in a USB drive connected to the

Symbio 700.

At this time, the user can “Update Firmware” from the Mobile
Service Tool.

A firmware update will not change configurations or point setup

parameters – this is different from restoring a controller Backup file.

Caveat: If Firmware is being downgraded, the controller database is

cleared

Download the latest Symbio 700 Firmware for Odyssey products at:

https://www.trane.com/commercial/north-america/us/en/products-systems/packaged-units-and-
split-systems/split-systems/odyssey-6-to-25-tons.html#downloads

118
If using a mobile device to complete the Symbio 700 firmware update:

Place the downloaded Symbio 700 Firmware for Odyssey products onto a USB mass storage device. The
USB drive should be formatted as FAT32.

Using a Bluetooth enabled mobile phone, download the Symbio Service & Installation mobile app from
the appropriate app store.

Install the USB mass storage device into the USB Host connector in the top left corner of the Symbio 700
controller.

Power up the Symbio 700 controller.

After the Symbio Service & Installation app has been installed, reference the Symbio Service &
Installation Quick Start Guide (BAS-SVN043*) for instructions on how to pair the mobile phone with the
Symbio 700 controller.

After a connection has been established, initiate the firmware update process using the Symbio Service
& Installation App.

Navigate to the “Tools” menu of the mobile app.

Select the “Update Firmware” process

Navigate to the appropriate firmware file that is located on the USB mass storage device and select it.

Confirm the Firmware Update to initiate the process

NOTE: The Firmware Update process may take 3-5 minutes once initiated.

After the firmware update has been completed, power down the system and remove the USB mass
storage device.

119
Restart Controller
Restart Controller

Privacy

This will remove the BLE pairing information on the embedded

controller, the user will be required to re-pair with the controller.

This is to comply with California regulations

120
Notes

121
Notes

122
Symbio 700 UC Onboard User Interface Menu Structure

123
Symbio 700 UC Onboard User Interface Menu Items

Think very hard before trying to use this feature for configuring the unit!
The preferred method is the Phone App.

124
HOME
Cooling Capacity Status %

Heat Cool Mode Status

Heat Secondary Capacity Status

Heating Capacity Primary Status

Occupancy Status

Space Temperature Active

Space Temperature Setpoint Active

Supply Fan Speed Status

Thermostat G Input

Thermostat W1/O Input

Thermostat W2 Input

Thermostat X2 Input

Thermostat Y1 Input

Thermostat Y2 Input

125
Status
Active Setpoints
Cooling Capacity Enable - Active

Cooling Capacity Setpoint BAS - Active

Cooling Capacity Setpoint Enable BAS - Active

Cooling Demand Limit Capacity Enable Setpoint - Active

Cooling Lockout BAS - Active

Demand Limit Request - Active

Demand Shed Offset Setpoint - Active

Discharge Air Cooling Setpoint (Target) - Active

Discharge Air Temperature Maximum Cool Limit - Active

Discharge Air Temperature Minimum Cool Limit - Active

Discharge Air Temperature Setpoint Active

Emergency Override BAS - Active

Filter Runtime Hours Setpoint - Active

Heat Cool Mode Request - Active

Heat Lockout Command - Active

Heat Primary Enable BAS - Active

Heat Pump Heating Lockout Setpoint - Active

Heating Capacity Setpoint BAS - Active

Heating Capacity Setpoint Enable BAS - Active

Heating Demand Limit Capacity Enable Setpoint - Active

Occupancy Request Active

Occupied Standby Cooling Setpoint BAS - Active

Occupied Standby Heating Setpoint BAS - Active

Space Temperature Cooling Setpoint Input Active

Space Temperature Heating Setpoint Input Active

Space Temperature Setpoint Active

Space Temperature Setpoint Input Active

126
Supply Air Tempering Enable - Active

Supply Fan Configuration Status

Supply Fan Maximum Output Signal - Active

Supply Fan Maximum Speed Setpoint - Active

Supply Fan Minimum Output Signal - Active

Supply Fan Minimum Speed Setpoint - Active

Supply Fan Speed Command - Active

Supply Fan Speed Command Enable - Active

VVZT DAT Control Mode – Active

System
Heat Cool Mode Status

Occupancy Input

Occupancy Input - AirFi

Occupancy Input Active

Occupancy Input Arbitrator

Occupancy Input BAS

Occupancy Status

Occupied Cooling Setpoint BAS

Occupied Heating Setpoint BAS

Outdoor Air Temperature Active

Outdoor Air Temperature Arbitrator

Outdoor Air Temperature BAS

Outdoor Air Temperature Local

Phase Monitor Status

Secondary Application Mode Status

Sensor Battery Status Air-Fi

Space CO2 Concentration Active

Space CO2 Concentration Air-Fi

127
Space CO2 Concentration Arbitrator

Space CO2 Concentration BAS

Space CO2 Concentration Input

Space Humidity Active

Space Humidity Air-Fi

Space Humidity Arbitrator

Space Humidity BAS

Space Humidity Input

Space Temp Cooling Setpoint Status

Space Temp Heating Setpoint Status

Space Temperature Active

Space Temperature Air-Fi

Space Temperature Arbitrator

Space Temperature BAS

Space Temperature Cooling Setpoint Air-Fi

Space Temperature Cooling Setpoint Input

Space Temperature Heating Setpoint Air-Fi

Space Temperature Heating Setpoint Input

Space Temperature Input

Space Temperature Setpoint Air-Fi

Space Temperature Setpoint BAS

Space Temperature Setpoint Input

Supply Air Tempering Status

Supply Fan Configuration Command Arbitrator

System Mode Switch Air-Fi

System Mode Switch Input

System Mode Switch Local

Thermostat G Input

Thermostat W1/O Input

128
Thermostat W2 Input

Thermostat X2 Input

Thermostat Y1 Input

Thermostat Y2 Input

Timed Override Air-Fi

Timed Override Input

Timed Override Status Active

Timed Override Status Arbitrator

Timed Override Timer Is Active

Unit Stop Source

Ventilation Override Exhaust Status

Ventilation Override Pressurize Status

Ventilation Override Purge Status

Indoor
Discharge Air Temperature Local

Filter Runtime Hours

Run Time - Supply Fan (Hours)

Starts - Supply Fan

Supply Fan Current

Supply Fan Output Status

Supply Fan Power

Supply Fan Signal Command Status

Supply Fan Speed Status

129
Refrigeration
Circuit 1 Defrost Status

Circuit 1 LPC Status

Circuit 2 Defrost Status

Circuit 2 LPC Status

Coil Temperature Sensor 1

Coil Temperature Sensor 2

Compressor 1 Command Status

Compressor 1 Proving Status

Compressor 1 Unloader Command Status

Compressor 2 Command Status

Compressor 2 Proving Status

Compressor 2 Unloader Command Status

Condenser Fan 1 Command Status

Condenser Fan 2 Command Status

Cooling Capacity Status

Defrost Status

Evaporator Defrost Status

FroStat Input

Refrigerant Type

Run Time - Compressor 1 (Hours)

Run Time - Compressor 2 (Hours)

Run Time - Condenser Fan 1 (Hours)

Run Time - Condenser Fan 2 (Hours)

Starts - Compressor 1

Starts - Compressor 2

Starts - Condenser Fan 1

Starts - Condenser Fan 2

Switchover Valve 1 Command Status

130
Switchover Valve 2 Command Status

Heat
Electric Heat Stage 1 Status

Electric Heat Stage 2 Status

Heat Secondary Capacity Status

Heating Capacity Primary Status

Run Time - Electric Heat Stage 1 (Hours)

Run Time - Electric Heat Stage 2 (Hours)

Starts - Electric Heat Stage 1

Starts - Electric Heat Stage 2

131
Settings
System
Arbitration Method Request

Demand Shed Offset Setpoint

Emergency Override BAS

Heat Cool Mode Request

Occupancy Request

Occupied Bypass Time

Occupied Offset

Occupied Standby Cooling Setpoint BAS

Occupied Standby Heating Setpoint BAS

Occupied Standby Offset

Space Cooling Setpoint High Limit BAS

Space Cooling Setpoint Low Limit BAS

Space Heating Setpoint High Limit BAS

Space Heating Setpoint Low Limit BAS

Supply Fan Configuration Command

Timed Override Request

Unit Stop Command

Unoccupied Cooling Setpoint

Unoccupied Heating Setpoint

VVZT DAT Control Mode

132
Indoor
Filter Runtime Hours Setpoint

Supply Fan Maximum Speed Setpoint

Supply Fan Minimum Speed Setpoint

Supply Fan Speed Command

Supply Fan Speed Command Enable

Refrigeration
Compressor Cooling P-Gain - 1 (%/F)

Compressor Cooling P-Gain - 2 (%/F)

Compressor Cooling P-Gain (%/F)

Compressor Cooling Reset Time - 1 (seconds)

Compressor Cooling Reset Time - 2 (seconds)

Compressor Cooling Reset Time (seconds)

Compressor Heating P-Gain (%/F)

Compressor Heating Reset Time (seconds)

Cooling Capacity Enable

Cooling Capacity Setpoint BAS

Cooling Capacity Setpoint Enable BAS

Cooling Demand Limit Capacity Enable Setpoint

Cooling Lockout BAS

Discharge Air Cooling Setpoint (Target)

Discharge Air Temperature Maximum Cool Limit

Discharge Air Temperature Minimum Cool Limit

133
Heat
Auxiliary Heating P-Gain (%/F)

Auxiliary Heating Reset Time (seconds)

Heat Lockout Command

Heat Primary Enable BAS

Heat Pump Heating Lockout Setpoint

Heating Capacity Setpoint BAS

Heating Capacity Setpoint Enable BAS

Heating Demand Limit Capacity Enable Setpoint

Supply Air Tempering Enable

134
Service
Diagnostics
Reset Diagnostic

Test
Performance Test State Request

Service Test State Request

Service Test Timeout (Minutes)

Statistics Reset
Compressor 1 Run Time Reset

Compressor 1 Starts Reset

Compressor 2 Run Time Reset

Compressor 2 Starts Reset

Condenser Fan 1 Run Time Reset

Condenser Fan 1 Starts Reset

Condenser Fan 2 Run Time Reset

Condenser Fan 2 Starts Reset

Electric Heat Stage 1 Run Time Reset

Electric Heat Stage 1 Starts Reset

Electric Heat Stage 2 Run Time Reset

Electric Heat Stage 2 Starts Reset

Filter Timer Reset

Supply Fan Run Time Reset

Supply Fan Starts Reset

135
Options Modules
Customer Options Module Communication Status

Customer Options Module Firmware Major Version

Customer Options Module Firmware Minor Version

Indoor Options Module Communication Status

Indoor Options Module Firmware Major Version

Indoor Options Module Firmware Minor Version

On-Board I/O Communication Status

On-Board I/O Firmware Major Version

On-Board I/O Firmware Minor Version

Modbus
Supply Fan VFD Communication Status

136
Utilities
About
Symbio 700 Software Version

Symbio Options Module 1 Software Version

Symbio Options Module 2 Software Version

Active Configuration
Refrigeration Circuit

Indoor Fan Type

Primary Heating Source

Secondary Heating Source

Ventilation Override

External Auto / Stop

Frostat

Alarm Indicator

Space Controller

Demand Management

Humidity Sensor

CO2 Sensor

Supply Air Tempering

Evaporator Defrost

Discharge Temperature Sensor

137
Edit Configuration
Clear & Reconfig.

Edit Configuration

System Type - CVZT, VVZT

Space Controller - Conventional TSTAT, Single Setpoint Zone Sensor, Dual Setpoint Zone Sensor

Indoor Fan Type – CV - Single Speed, Multi Speed, VV – Variable Speed

Refrigeration System - Cooling Only, Heat Pump

Refrigerant - R22, R410A

Tonnage - R-22 - 7.5, 10, 15, 20, R-410A - 6, 6.25, 7.5, 8.33, 10, 12.5, 15, 20 (+25 for TTA)

Refrigeration Circuit - Single, Dual

Voltage - 208/230 -60, 380/415-50, 380/60, 460/60, 575/60

Efficiency - Standard,

Evaporator Defrost - Installed, Not Installed

Primary Heating Source - Not Installed, Electric

Primary Heating Type - Staged

Secondary Heating Type - Not Installed, Electric

Primary Heating Stages - 1, 2

Frostat - Installed, Not Installed

Humidity Sensor - Installed, Not Installed

CO2 Sensor - Installed, Not Installed

Discharge Temp Sensor - Installed, Not Installed

External Auto Stop - Installed, Not Installed

Ventilation Override - Installed, Not Installed

Alarm Indicator - Installed, Not Installed

Demand Management - None, Demand Limit, Demand Shed

Supply Air Tempering - Disabled

138
Display
Backlight Timeout

Display Units

Scrolling Speed -Lower # faster it goes

Date and Time

Current Time

Time Zone

LON
Service Pin Request

139
Initiating Test Mode on an Odyssey Symbio using the Onboard User Interface.

To Initiate Test Mode

Press the Home Button

Down Arrow to Service

Press the Check Mark

Down Arrow to Test

Press the Check Mark

Down Arrow to Service Test – DO NOT USE PREFORMANCE TEST!

Press the Check Mark

The I on Inactive flashes

Down Arrow to what you want to test

Press the Check Mark.

To Exit Test Mode

Press the Check Mark.

Up arrow to Inactive

Press the Check Mark

140
Interconnecting Wiring Between Condensers and Air Handlers

Interconnecting Wire Info.

Note: If you have a VFD with a Symbio Condenser you must run BOTH Adapter Board J15-3 & 4 to Relay
Board J4-3 & 4 and Adapter Board J16-1 & 2 to Relay Board J7-1 & 2 twisted pair!

“Officially” Allowed Pairings

Symbio Condenser with a Symbio CV Air Handler = Pairing A

Symbio Condenser with a Symbio SZVAV / 2-Speed Air Handler = Pairing B

Legacy Electromechanical Condenser with a Symbio 2-Speed Only Air Handler = Pairing C

Symbio Condenser with a Legacy CV Air Handler

Symbio Condenser with a Legacy 2-Speed Air Handler

Legacy Electromechanical Condenser with a Symbio CV Air Handler

Legacy Reliatel Condenser with a Symbio CV Air Handler

141
Pairing A & B: Symbio Condenser or Heat Pump with Constant Volume Air Handler
or SZVAV / 2 Speed Air Handler
1. Wire Zone Sensor to J19 or Thermostat to J21 on the Symbio 700 UC in the outdoor unit.

Connections between Condenser and Air Handler

2. All A and B Pairings

Thermostat Wire – 4 wires (recommend running wires in step 3 on all A & B Pairings)
a. Symbio Condenser Adapter Board J15-1 & 2 to Symbio Air Handler Relay Board J10-1 & 2. (power
for Air Handler RB)
b. Symbio Condenser Adapter Board J18-1 to Symbio Air Handler Relay Board J5-4. (indoor fan run)
c. Symbio Condenser (UC) J16-2 to Symbio Air Handler Relay Board J5-1. (EDC)
d. If using the EDC in the Air Handler – in Edit Configuration set Demand Management to Demand
Limit and in Settings, Refrigeration set Cooling Demand Limit Capacity Enable Setpoint to 0%

3. With VFD or Electric Heat (or if Electric Heat will be added in the future)

Thermostat Wire – 2 Wires inside Air Handler

a. Symbio Condenser Relay Board J10-1 & 2 to Symbio Air Handler Relay Board J4-1 & 2.

Shielded Twisted Pair (ground shield in air handler)

b. Symbio Condenser Adapter Board J15-3 & 4 to Symbio Air Handler Relay Board J4-3 & 4.

4. VFD Units only

Thermostat Wire – 1 Wire

a. Symbio Condenser Adapter Board J16-3 to Symbio Air Handler Relay Board J7-3

Shielded Twisted Pair (ground shield in air handler)

b. Symbio Condenser Adapter Board J16-1 & 2 to Symbio Air Handler Relay Board J7-1 & 2

Pairing C: Legacy Electromechanical Condenser with Symbio 2-Speed Air Handler

Install wiring from room thermostat to Air Handler Relay Board J5

Connections between Condenser and Air Handler

1. Thermostat Wire – 4 wires

a. Electromechanical Condenser LTB1-R to Symbio Air Handler Relay Board J10-1.
b. Electromechanical Condenser LTB1-B1 to Symbio Air Handler Relay Board J10-2.
c. Electromechanical Condenser LTB1-Y1 to Symbio Air Handler Relay Board J5-5.
d. Electromechanical Condenser LTB1-Y2 to Symbio Air Handler Relay Board J5-6.

2. Evaporator Coil Defrost Control: For operation Electromechanical condensers, change the wiring on
the switch to the Normally Closed position and connect the wires from the switch to the wires from the
legacy condenser that control this function.

3. Electric Heat (when installed) - For all wiring associated with electric heat, refer to Air Handler unit schematic
and Electric Heat Accessory Installation Guide (ACC-SVN91*-EN).

142
143
Symbio Condenser (Cooling or Heat Pump) with Legacy CV Air Handler
Wire the thermostat to the Symbio 700 J21 except for R and C, wire thermostat R to Symbio Adapter Board
J15-1, wire thermostat C to Symbio Adapter Board J15-2.

Connections between Condenser and Air Handler

1. Thermostat Wire – 3 Wires w/o electric heat, 5 wires with electric heat.
a. Symbio Condenser Adapter Board J15-1 to LTB2-R in the air handler.
b. Symbio Condenser Adapter Board J15-2 to LTB2-B1 in the air handler.
c. Symbio Condenser Adapter Board J18-1 to LTB2-G in the air handler.
d. Symbio Condenser UC J21-3 to Air Handler LTB2-W1.
e. Symbio Condenser UC J21-5 to Air Handler LTB2-W2.

2. Symbio configuration - When connecting a room thermostat or zone controller to the Symbio Condenser,
ensure that the Symbio 700 Unit Controller configuration has been set for the appropriate device,
Conventional TStat, Single Setpoint Zone Sensor or Dual Setpoint Zone Sensor.

Note: A Zone Sensor will not control Electric Heat.

Primary Heating Source: If the Air Handler has Electric Heat, be sure to configure the Symbio 700 UC for
Primary Heating Source – Not Installed or you will get a Diagnostic for Options Module Comm Fail (The
Symbio 700 will still turn the Indoor Fan on with a W1 call)

3. If using the EDC (Evaporator Defrost Control) thermostat in the legacy air handler, it will be necessary to
add a 24VAC relay with Normally Closed contacts to change the action of the EDC from N.C. to N.O. for
connection to the Symbio 700 in the condenser as shown below.

a. Move wire W12(BL) to one side of the coil of the field supplied 24VAC relay (R).
b. Move wire W11(Y) from to LTB2-R.
c. Add field wire between other side of relay coil and LTB2-B1.
d. Connect normally closed relay contact to Symbio Condenser (UC) J16-1 & 2.
e. In Edit Configuration set Demand Management to Demand Limit and in Settings, Refrigeration
set Cooling Demand Limit Capacity Enable Setpoint to 0%

144
Symbio Condenser (Cooling Only) with Legacy 2 Speed Electromechanical Air
Handler
Wire the thermostat to the Symbio 700 J21 except for R and C, wire thermostat R to Symbio Adapter Board
J15-1, wire thermostat C to Symbio Adapter Board J15-2.

Connections between Condenser and Air Handler

1. Thermostat Wire – 4 Wires w/o electric heat, 5 Wires with electric heat

a. Symbio Condenser Adapter Board J15-1 to Air Handler LTB2-R.

b. Symbio Condenser Adapter Board J15-2 to Air Handler LTB2-B1.
c. Symbio Condenser UC J21-6 to Air Handler LTB2-Y2. (Y1 is not used in the Air Handler)
d. Symbio Condenser Adapter Board J18-1 to Air Handler LTB2-G.
e. Symbio Condenser UC J21-3 to Air Handler LTB2-W1 (W1 and W2 are jumped together in the Air
Handler to take care of activating the HSR1)

2. Symbio Configuration
a. Space controller configuration: When connecting a Conventional Thermostat to the Symbio UC,
ensure that the Symbio 700 UC configuration has been set for the appropriate device -
Conventional TStat.

b. Indoor Fan Type: When connecting the SymbioTM Condenser to an electromechanical air handler
with 2-speed fan operation, ensure that the Symbio 700 UC Indoor Fan Type configuration is set to
its default “Single Speed” selection. The Air Handler Relay Board will take care of switching the fan
speeds based on the thermostat call.

c. Primary Heating Source: If the Air Handler has Electric Heat, be sure to configure the Symbio 700
UC for Primary Heating Source – Not Installed or you will get a Diagnostic for Options Module
Comm Fail (The Symbio 700 will still turn the Indoor Fan on with a W1 call)

3. If using the EDC (Evaporator Defrost Control) thermostat in the legacy air handler, it will be necessary to
add a 24VAC relay with Normally Closed contacts to change the action of the EDC from N.C. to N.O. for
connection to the Symbio 700 in the condenser. Make wiring changes indicated below.
a. Move wire 37L(BL) from LTB2-B2 to one side of the coil of the field supplied 24VAC relay (R).
b. Move wire 68AK(Y) to LTB2-R.
c. Add field wire between other side of relay coil and LTB2-B1.
d. Install a jumper between LTB2-B1 and LTB2-B2 (if not already present)
e. Connect normally closed relay contact to Symbio Condenser (UC) J16-1 & 2
f. In Edit Configuration set Demand Management to Demand Limit and in Settings, Refrigeration set
Cooling Demand Limit Capacity Enable Setpoint to 0%

145
Legacy Electromechanical Condenser with Symbio CV Air Handler
Wire thermostat to the Air Handler Relay Board J5 except for R and C, wire R to the Symbio Air Handler
Relay Board J10-1, wire “COM” to Symbio Air Handler Relay Board J10-2.

Connections between the Condenser and Air Handler

1. Thermostat Wire – 4 wires

a. The Y1 from the thermostat will go directly to the Condenser LTB1-Y1.

b. The Y2 from the thermostat will go directly to the Condenser LTB1-Y2.
c. Condenser LTB1-R to Symbio Air Handler Relay Board J10-1.
d. Condenser LTB1-B1 to Symbio Air Handler Relay Board J10-2.

Note: W1 and W2 connections are needed only if air handler has an electric heat accessory installed. A new
electric heater must be used with a Symbio air handler. Legacy electric heaters cannot reused on
Symbio air handlers.

2. If the EDC (Evaporator Defrost Control) thermostat is used, follow these steps:
a. Switch is shipped in the normally open configuration. When pairing with an electromechanical
condenser, move wire from terminal “H” to terminal “L” on EDC switch, enabling normally closed
switch operation.
b. Cut the EDC Black wire from plug J8 and move to J10-2

146
Legacy Reliatel Condenser (Cooling or Heat Pump) with Symbio CV Air Handler
1. Maintain and make no changes to wiring from zone control devices and/or Building Management System
wiring to RTRM module in Reliatel condenser.

2. Repurpose or make new connections between Air Handler and Condenser as shown in Figure 8.

Note: W1 and W2 connections are needed only if air handler has an electric heat accessory installed. A new
electric heater must be used with a Symbio air handler. Legacy electric heaters cannot reused on
Symbio air handlers.

3. If the EDC (Evaporator Defrost Control) thermostat is used, follow these steps:
a. Switch is shipped in the normally open configuration. When pairing with a Reliatel condenser, move
wire from terminal “H” to terminal “L” on EDC switch, enabling normally closed switch operation.

147
- Pairings not in the IOM -

ABANDON
HOPE
ALL
YE
WHO
ENTER
HERE

148
Reliatel Condenser paired with a Symbio SZVAV Air Handler
Order the following
Harness from Air Handler Relay Board J11 to VFD PPM53 – WIR010190

Harness PPF53 to the VFD – WIR010185

Interconnecting Wiring
Condenser LTB2-R to Air Handler Relay Board J10-1

Condenser LTB1-B to Air Handler Relay Board J10-2

Condenser RTRM J7 (Y2) to Air Handler Relay Board J5-6

Condenser LTB1-EF to Air Handler Relay Board J5-4

Condenser LTB1-H1 to Air Handler Relay Board J5-7 - Electric Heat

Condenser LTB1-H2 to Air Handler Relay Board J5-8 - Electric Heat

EDC Switch - Optional

Condenser LTB2-CD to Air Handler Relay Board J5-1

Move wire from terminal “H” to terminal “L” on EDC switch, enabling normally closed switch operation.

149
TR-150 Drive
Remove the existing wire harness from Relay Board P1 to VFD terminals 61, 68 and 69.

Install WIR010190 and WIR010185 following the diagram below.

TR-150 Drive Parameters

Change 3-15 from Local Bus to Analog Input 53

Change 5-10 from No Operation to Start

Change 5-12 from No Operation to Coast Inverse

Change 8-01 from Control Word Only to Digital and Control Word

Change 8-02 from FC Port to None

Verify 4-12 is set to 25 HZ

Verify 4-14 is set to 60 HZ

Verify 6-10 is set to 0.07V

Verify 6-11 is set to 10.00V

Verify 6-14 is set to 25 HZ

Verify 6-15 is set to 60 HZ

150
Symbio Condenser (Cooling Only) with Reliatel SZVAV Air Handler (TR-150 only)
Note: You will always have the following alarms – Indoor Options Module Communication Status, Diagnostic:
Unit Communications Failure and Frostat – but the unit will still operate (as a multi-Speed – no DTS)

Wire the thermostat to the Symbio 700 J21 except for R and C, wire thermostat R to Symbio Adapter Board
J15-1, wire thermostat C to Symbio Adapter Board J15-2.

Connections between Condenser and Air Handler

1. Thermostat Wire – 4 Wires w/o electric heat, 6 Wires with electric heat

a. Symbio Condenser Adapter Board J15-1 to Air Handler LTB2-R.

b. Symbio Condenser Adapter Board J15-2 to Air Handler LTB2-B1.
c. Symbio Condenser Adapter Board J18-1 to Air Handler LTB2-G. (as a back-up)
d. Symbio Condenser Adapter Board J16-3 to Air Handler VFD terminal 61.
e. Symbio Condenser UC J21-3 to Air Handler LTB2-W1
f. Symbio Condenser UC J21-5 to Air Handler LTB2-W2

2. Shielded Twisted Pair – Ground shield at Air Handler

a. Condenser Adapter Board J16-1 to VFD Terminal 68, J16-2 to VFD Terminal 69.

3. Symbio Configuration
a. System Type: CVZT
b. Indoor Fan Type: Multi Speed

4. Fan Interlock Wiring for Electric Heat

a. Add a field wire from VFD Relay 2, Terminal 5 to LTB2-B1.
b. Move the Brown wire (from the Electric Heat Accessory) from LTB1-J to VFD Relay 2, Terminal 4.

151
5. VFD Programming

3-15 Reference 1 Source – [11] Local Bus Reference

5-10 Terminal 18 Digital Input – [0] No Operation
5-12 Terminal 27 Digital Input – [0] No Operation
5-40 Function Relay – [0] (Relay 1) [6] Running / no warning (Relay 2)
8-01 Control Site – [2] Control Word Only
8-02 Control Source – [1] FC Port
8-03 Control Timeout Time – 15.0 sec
8-04 Control Timeout Function – [2] Stop
8-30 Protocol – [2] Modbus RTU
8-31 Address – 2
8-32 Baud Rate – [7] 115200 Baud
8-33 Parity / Stop Bits – [0] Even Parity, 1 Stop Bit
8-35 Minimum Response Delay - .005 sec 5ms
8-36 Maximum Response Delay – .01 sec 100ms

6. If using the EDC (Evaporator Defrost Control) thermostat in the legacy air handler, it will be necessary to
add a 24VAC relay with Normally Closed contacts to change the action of the EDC from N.C. to N.O. for
connection to the Symbio 700 in the condenser. Make wiring changes indicated below.

a. Add a field wire from LTB2-CD to one side of the coil of the field supplied 24VAC relay (R).
b. Add field wire between other side of relay coil and LTB2-B1.
c. Connect normally closed relay contact to Symbio Condenser (UC) J16-1 & 2
d. In Edit Configuration set Demand Management to Demand Limit and in Settings, Refrigeration
set Cooling Demand Limit Capacity Enable Setpoint to 0%

Optional

To get rid of the Indoor Options Module Communication Status, Diagnostic: Unit Communications Failure
and Frostat Alarms you could replace the RTOM with a BAYMODU001 Symbio Options Board kit.
The Symbio Options Board has two mounting holes that line up with the RTOM mounting holes, but be
aware the Symbio Options Board is 5.5” x 6.75” make sure there is room in the control box.
If you chose to go this route, the following additional wires would have to be added.

Thermostat Wire – 2 Wires

b. Symbio Condenser Adapter Board J15-1 & 2 splice to Symbio Options Board P5-1 & 2.

Shielded Twisted Pair (ground shield in air handler)

a. Symbio Condenser Adapter Board J15-3 & 4 splice to Symbio Options Board P5-3 & 4

152
Symbio Condenser (Cooling Only) with Reliatel SZVAV Air Handler (TR-150 and TR-
200)
Unit will operate as a 2-Speed

Wire the thermostat to the Symbio 700 J21 except for R and C, wire thermostat R to Symbio Adapter Board
J15-1, wire thermostat C to Symbio Adapter Board J15-2.

Replace the RTOM with a (Symbio Relay Board) MOD03105

Remove wires 81B, 82B, 93B, 94B and 94D from VFD.

Replace with WIR01085 and WIR01090 purchased from Trane Parts.

153
 Connections between Condenser and Air Handler (if using EDC add 2 more wires)

1. Thermostat Wire – 5 Wires w/o electric heat, 7 Wires with electric heat
a. Symbio Condenser Adapter Board J15-1 to Air Handler LTB2-R.
b. Symbio Condenser Adapter Board J15-2 to Air Handler LTB2-B1.
c. Symbio Condenser Adapter Board J18-1 to Air Handler Relay Board J5-4
d. Symbio Condenser UC J21-2 to Air Handler Relay Board J5-5
e. Symbio Condenser UC J21-6 to Air Handler Relay Board J5-6
f. Symbio Condenser UC J21-3 to Air Handler LTB2-W1
g. Symbio Condenser UC J21-5 to Air Handler LTB2-W2

Connections inside Air Handler

2. Thermostat Wire
a. Air Handler LTB2-R to Relay Board J10-1
b. Air Handler LTB2 –B1 to Relay Board J10-2
c. Air Handler LTB2-W1 to Relay Board J5-7
d. Air Handler LTB2-W2 to Relay Board J5-8

3. VFD Programming

a. 5-40 Function Relay – [0] (Relay 1) [6] Running / no warning (Relay 2)

4. Symbio Configuration
a. System Type: CVZT
b. Indoor Fan Type: Single Speed

5. Fan Interlock Wiring for Electric Heat

a. Add a field wire from VFD Relay 2, Terminal 5 to LTB2-B1.
b. Move the Brown wire (from the Electric Heat Accessory) from LTB1-J to VFD Relay 2, Terminal 4.

154
6. If using the EDC (Evaporator Defrost Control), it will be necessary to add a 24VAC relay with Normally
Closed contacts to change the action of the EDC from N.C. to N.O. for connection to the Symbio 700 in the
condenser. Make wiring changes indicated below.

a. Add a field wire from LTB2-CD to one side of the coil of the field supplied 24VAC relay (R).
b. Add field wire between other side of relay coil and LTB2-B1.
c. Connect normally closed relay contact to Symbio Condenser (UC) J16-1 & 2
d. In Edit Configuration set Demand Management to Demand Limit and in Settings, Refrigeration
set Cooling Demand Limit Capacity Enable Setpoint to 0%

155
Experimental Relay Logic Defrost Heat Circuit

Theory of Operation
If the Symbio (UC) is calling for a compressor to run, and not calling for a condenser fan to run,
the unit is in Defrost Mode so turn on a stage of heat.

156
Odyssey Air Handler R22 and R410a TXV Valve Conversion Guide

Converting R22 Odyssey Air Handlers to R410a Compatible – Cooling Only Applications – Heat
Pump Applications Require a 3rd Party Indoor Coil Replacement
Air handler must be manufactured after 2004 to be applied with R410a
R22 Model R22 Tons Inlet x Outlet R410a Tons R410a Part #
TWE060A 4 3/8” x 1/2” 4 VAL09478
TWE060B 2 3/8” x 1/2" 2 VAL09476
TWE090A 8 1/2" x 7/8” 8 VAL08785
TWE090B 3 3/8” x 1/2” 3 VAL09477
TWE120A 8 1/2" x 7/8” 8 VAL08785
TWE120B 4 3/8” x 1/2" 4 VAL09478
TWE180B 8 1/2” x 7/8” 8 VAL08785
TWE240B 8 1/2" x 7/8” 8 VAL08785

Converting R410a Odyssey Air Handlers to R22 Compatible – Cooling Only and Heat Pump
Applications
R410a Model R410a Tons Inlet / Outlet R22 Tons R22 Part #
TWE061D 6 1/2" x 5/8” 6 VAL08084
TWE061E 3 (2) 1/2" x 5/8” 3 (2) * VAL08081
TWE073D N/A N/A N/A N/A
TWE073E N/A N/A N/A N/A
TWE090D 8 1/2" x 7/8” 8 VAL04911
TWE090E 5 (2) 1/2” x 5/8” 5 (2) VAL08083
TWE120D 8 1/2" x 7/8” 8 VAL04911
TWE120E 6 (2) 1/2" x 5/8” 6 (2) VAL08084
TWE150E 8 (2) 1/2" x 5/8” 8 (2) VAL04911
TWE180E 8 (2) 1/2” x 5/8” 8 (2) VAL04911
TWE240E 8 (2) 1/2” x 7/8” 8 (2) VAL04911
TWE300E 12.5 (2) 11.5 (2) EBSVE11
(sporlan)
* Note: VAL08081 has a 3/8” inlet x 1/2" outlet

All Thermostatic Expansion Valves in this guide are adjustable.

157
Odyssey Refrigeration Miscellaneous Info.

Microchannel Heat Exchanger Condensers (MCHE)

This design improves heat transfer and the refrigerant that enters the coil quickly turns to liquid.

The MCHE tube volume holds very little refrigerant, so the refrigerant charge of the system is reduced.
However, the tube volume is so small that if the flow of refrigerant out of the MCHE condenser is
slowed much more than the flow of refrigerant into the MCHE condenser, the condenser may quickly fill
with liquid and cause a high-pressure control trip. To avoid this condition, the designer or servicer
should not include the following:

• Pump-down: The storage capacity of the MCHE won’t support pump-down.

• Trim solenoid: The storage capacity of the MCHE won’t support partial shut-off of the evaporator coil.

Solenoid Valves
In TTA split systems, solenoid valves may be used to isolate the refrigerant from the evaporator during
the off cycles. This is only done when the indoor unit is well below the outdoor unit.

The solenoid valve on the TTA unit is a drop solenoid—open when the compressor is on, and off when
the compressor is off.

If used, the solenoid requires code compliant wiring to the TTA condensing unit. (just a suggestion…you
could wire a 24 VAC solenoid in parallel with the compressor contactor)

Notes:

• Solenoids should not be used in the TWA heat pumps due to the reverse flow of the liquid.

Moisture-Indicating Sight glass

Be sure to install one moisture-indicating sight glass in the main liquid line.

Note: The sole value of the glass is its moisture indicating ability.

Use the Charging Charts—not the sight glass—to determine proper charge levels .

158
Hot Gas Bypass
Systems should be designed to avoid HGBP whenever possible. But, if HGBP is necessary for the
application - like 100% OA - then the system must be designed to support HGBP.

As an example, the line lengths are limited to 75 feet.

For more information, please reference Trane Application Guide Hot Gas Bypass Installation Guidelines
for Direct Expansion (DX) Equipment, APP-APG017-EN.

Line Sizing
For line lengths 25 feet or less use the line sizes in the unit IOM.

For line lengths greater than 25 feet, use the line sizes in the Odyssey Application Guide (SS-APG008*-
EN).

Oil-Traps
Trane does not recommend oil traps on any application.

Leak Checking
Pressurize the system through the gauge port with dry nitrogen to 200 psi.

System Evacuation
Attach appropriate hoses from manifold gauge to gas and liquid line pressure taps.

Evacuate the system to hold a 500 micron vacuum.

Close off valve to vacuum pump and observe the micron gauge. If gauge pressure rises above 500

microns in one minute, then evacuation is incomplete, or the system has a leak.

If vacuum gauge does not rise above 500 microns in 10 minutes, the evacuation should be complete.

159
Unit Charging
The charging charts below lists Refrigerant Charge and Base matched unit charge.

Refrigerant Charge is for exactly 25 feet of line length. (Chart Note 1)

Base matched unit charge is for 0 feet of line length (Chart Note 2)

For example using this chart

Base charge 5.2, Ounces per foot 1.15

Distance between units 15 feet, (15 X 1.15) /16 = 1.08 lbs + 5.2 = 6.28 lbs.

Distance between units 25 feet, (25 X 1.15) /16 = 1.8 lbs + 5.2 = 7.0 lbs.

Distance between units 50 feet, (50 X 1.15) /16 = 3.6 lbs + 5.2 = 8.8 lbs.

160
TTA Charging and Pressure Charts

161
TTA0724*A* with TWE0904*A*

162
TTA0724*D* with TWE0724*B*

163
TTA0724*D* TWE0724*B* Pressure Curve

164
TTA0904*A* with TWE0904*A*

165
TTA0904*A* with TWE1204*A*

166
TTA0904*D* with TWE0904*D*

167
TTA0904*D* with TWE0904*D* Pressure Curve

168
TTA1204*C* with TWE1204*A*

169
TTA1204*D with TTA1204*C

170
TTA1204*D with TTA1204*C Pressure Curve

171
TTA1204*D with TTA1204*C

172
TTA1204*D with TTA1204*C Pressure Curve

173
TTA1804*D* with TWE2404*B*

174
TTA1804*D* with TWE2404*B* Pressure Curve

175
TTA1804*C* with TWE1804*B*

176
TTA2404*D* with TWE2404*B*

177
TTA2404*D* with TWE2404*B* Pressure Curve

178
TTA2404*C* with TWE2404*B*

179
TTA3004*C* with TWE3004*B*

180
TTA0902*A* with TWE0902*A*

181
TTA1202*A* with TWE1202*A*

182
TTA1802*D* with TWE180B*

183
TTA2402*D* with TWE240B*

184
TTA1802*D with TWE180B

185
TTA2402*D with TWE240B

186
TWA Charging and Pressure Charts

187
TWA0724*A with TWE0904*A

188
TWA0724*A with TWE0904*A Pressure Curve

189
TWA0724*D with TWE0904*B

190
TWA0724*D with TWE0904*B Pressure Curve

191
TWA0904*A with TWE0904*A

192
TWA0904*A with TWE0904*A Pressure Curve

193
TWA0904*D with TWE0904*D

194
TWA0904*D with TWE0904*D Pressure Curve

195
196
TWA1204*A with TWE1204*A

197
TWA1204*A with TWE1204*A Pressure Curve

198
TWA1204*D with TWE1204*D

199
TWA1204*D with TWE1204*D Pressure Curve

200
201
TWA1804*D with TWA1804*B

202
TWA1804*D with TWA1804*B Pressure Curve

203
204
TWA2404*D with TWA2404*B

205
TWA2404*D with TWA2404*B Pressure curve

206
207
TWA0902*A with TWE0902*A

208
TWA1202*A with TWE1202*A

209
 Acknowledgements
This manual is a compilation of information gathered from PowerPoints, IOMs, other published
manuals, information from the Engineering Team, information from bench testing in Light
Commercial Tech Support and information gathered from Tech Support phone troubleshooting
with field personnel.
Electrical measurements recorded in this manual were done with my personal voltmeter.
This manual is not supported or approved by the Trane Literature Department and The Trane
Company assumes no liability concerning the accuracy of the contents.
Thanks to the Light Commercial Tech Support Team for covering for me on the phone while I
assembled this manual.
Thanks to the Engineering Team for contributing valuable information and hardware.
Hopefully this manual will suffice until we get an official manual.

Rickie L. Keel
Light Commercial Tech Support

210