LCF Touch RS485 Modbus

Electronic FanCoil Thermostat with Touch Display (flush mounting)

(ab Firmware 2.4)

Datasheet
Subject to technical alteration
Issue date: 22.04.2024 • A140

» APPLICATION
Modern design flush mounting fan coil room thermostat, used for individual control of temperature in commercial, industrial and residential buildings.
It is tailored for two-pipe and four-pipe fan coil units with two-wire electric valves. The device combines digital technology with a large LCD touch
screen display, which enables the 2-point-single room controller to be used intuitively. Integrated 7 day time clock with 4 time programs.

» SECURITY ADVICE – CAUTION

The installation and assembly of electrical equipment should only be performed by authorized personnel.

The product should only be used for the intended application. Unauthorised modifications are prohibited! The product must not
be used in relation with any equipment that in case of a failure may threaten, directly or indirectly, human health or life or result
in danger to human beings, animals or assets. Ensure all power is disconnected before installing. Do not connect to live/operating
equipment.

CAUTION! Risk of electric shock due to live components within the enclosure, especially devices with mains voltage
supply (usually between 90..265 V).

Please comply with

Local laws, health & safety regulations, technical standards and regulations
Condition of the device at the time of installation, to ensure safe installation
This data sheet and installation manual

» NOTES ON DISPOSAL
The crossed-out wheelie bin symbol indicates that the product or removable batteries must not be disposed of with household or
commercial waste. Within the EU, you are legally obliged to dispose of the product separately and appropriately in accordance
with the national laws of your country. Alternatively, please contact your supplier or Thermokon Sensortechnik GmbH. Further
information can be found at: www.thermokon.com

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.de · email@thermokon.de
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» GENERAL REMARKS CONCERNING SENSORS

Especially with regard to passive sensors in 2-wire conductor versions, the wire resistance of the supply wire has to be considered. If necessary
the wire resistance has to be compensated by the follow-up electronics. Due to self-heating, the wire current affects the measurement accuracy,
so it should not exceed 1 mA.
When using lengthy connection wires (depending on the cross section used) the measuring result might be falsified due to a voltage drop at the
common GND-wire (caused by the voltage current and the line resistance). In this case, 2 GND-wires must be wired to the sensor - one for supply
voltage and one for the measuring current.
Sensing devices with a transducer should always be operated in the middle of the measuring range to avoid deviations at the measuring end
points. The ambient temperature of the transducer electronics should be kept constant. The transducers must be operated at a constant supply
voltage (±0,2 V). When switching the supply voltage on/off, onsite power surges must be avoided.

» MOUNTING ADVISE ROOM SENSORS

The Accuracy of the room sensors are influenced by the technical specifications as well as the positioning and the installation type.

During Assembly:
• Seal mounting box (if present).
• Installation type, air draught, heat source, radiation heat or direct sunlight can affect the measurement.
• Bulding material specific properties of the installation place (brick-, concrete-, partition wall, cavity wall, …) can affect the measurement.

Assembly not recommendet in…

• Air draught (e.g.: close to windows / doors / fans …)
• Near heating sources,
• Direct sunlight
• Niches / between furniture / …

» TECHNICAL DATA
Measuring values temperature

Output switch contact Terminal 1 |2 | 3 Terminal 4 | 5

3 normally open contacts FanCoil (2-point-controller)
240 V max. load 3 A 2 normally open contacts heating/cooling
fan stages switchover pause 0,5 s 240 V max. load 3 A

Network technology RS485 Modbus, RTU, half-duplex, baud rate 4.800, 9.600, 19.200 or 38.400, parity: non (2 stopbits), even
or odd (1 stopbit), RS485 bus load: ¼ unit load according to RS485 standard (max. 128 devices)

Power supply 90..265 V ~

Power consumption 0,9 VA (265 V ~)

Measuring range temp +34..+99 °F

Accuracy temperature ±0,5 K (typ. at 70 °F)

Sensor NTC10k

Inputs Terminal 7 | 8
input for change-over sensor (NTC 10 K)

Control functions setpoint adjustment +34..+99 °F, (Default +60..+86 °F)

Display LCD-module with Touch and LED-illumination

Enclosure ABS, scratch-resistant acrylic glass

Protection IP20 according to EN 60529

Connection electrical terminal block max. 16AWG

Ambient condition +14..+122 °F, max. 85% rH non-condensing

Weight 5.64 oz.

Mounting flush mounted with standard EU box (Ø=2.36 in.)

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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» PRODUCT TESTING AND CERTIFICATION

Declaration of conformity
The declaration of conformity of the products are available on our website
https://www.thermokon.de/direct/en-gb/categories/lcf-touch

» CONNECTION PLAN

LCF Touch Modbus – Auto mode wiring diagram for 2-pipe fan coil

LCF Touch Modbus – Manual mode wiring diagram for 2-pipe fan coil

LCF Touch Modbus – wiring diagram for 4-pipe fan coil

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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» MOUNTING ADVICES
For installing or repairing, please make sure the power for the thermostat has been
turned off.
1. Insert the screw driver in the plastic teeth of the thermostat to open the enclosure.
2. Please follow the wiring diagram to connect the wires.
3. Fix the thermostat base plate to the wall by using the four screw holes with a
distance between the axes of 2.36 in.
4. Fasten base plate and front cover. Do not press the panel in order to protect LCD.

» COMMISSIONING

Setting parameter No. 13, the selection of the fan coil system has to be done. 2-pipe or 4-pipe systems can be selected.
Hysteresis: 1 K + 1 minute delay

Operation in 2-pipe system (parameter No. 13 set to 2):

When using a change-over sensor, the thermostat can detect whether the fluid is convenient for cooling or for heating:

• Operation without a change-over sensor:

In the 2-pipe system, a fluid can be used only for cooling or only for heating depending on the temperature of the fluid. When no
change-over sensor is used, heating, cooling and ventilating mode have to be selected manually using MODE settings (depending on
the desired action of the heating/cooling system).
• Operation with a change-over sensor (Auto change-over mode):
By using an change-over sensor, the system recognizes, whether the fluid has the necessary temperature for cooling or for heating.
The heating or cooling control sequence will be automatically selected. When temperature is ≤+19 °C, cooling mode is activated; when
the temperature is ≥+30 °C, the heating mode is active. Configurable via Holding Register 40010|40011. MODE key has no function in
this case.

Operation in 4-pipe system (parameter No. 13 set to 4):

The thermostat switches automatically between cooling and heating. A time delay of approx.. 1 min between cooling/heating mode changes is
implemented to ensure safe and eco-friendly operation. Parameter No.14 has to be set to 1 to enable the device for operating in auto mode.

Mode selection:
Manual Mode: 2-pipe-System: Cooling → Ventilating → Heating
4-pipe-System: Cooling → Ventilating → Heating → Auto change-over mode (only when parameter No. 14 is set
to 1!)
AUTO-Mode: The mode will be selected automatically.

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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Fan Stage selection:

In Cooling, Heating or Auto mode, following fan stages can be selected: Low → Med → Hi → Auto
In Ventilation mode, following fan stages can be selected: Low → Med → Hi
Ventilation mode can be deactivated by setting parameter No. 15 to “0”.

Auto mode:

Display °C or °F
Display of the units °C or °F can be selected using parameter No. 12. Fahrenheit temperature display range is 32..99 °F, °C temperature display
range is 0..50 °C. Factory default is °C.
Note: Under Parameter No.1 the temperature offset can be adjusted. This feature should be used if the temperature at the mounting place of the
Room Thermostat is not accurate to the average room temperature.

Temperature Room Temperature set point selection:

By pressing “▲” or “▼” button, the room temperature set point can be adjusted. °C Range is 16..30 °C, Fahrenheit temperature range is 60..86 °F.
By using Parameter No. 4 and No. 5, the set point ranges can be adjusted.

Fan stage/Valve control selection:

Under Fan operation “INDEPENDENT”, the fan will always operate according to the selected or automatically assigned fan stage; under Fan
operation “DEPENDENT”, the fan will be tuned off in case the valve is closed. If the valve is open, the fan will operate according to the selected or
automatically assigned fan stage.
By using parameter No. 16, the “INDEPENDENT” or “DEPENDENT” mode can be selected.
Key lock selection (No. 2), power failure selection (No. 3), screen save mode (No. 6) can be set by Parameters.
Also in parameter No. 7 you are able to read the LCD display status.

Sensor failure alarm:

If the temperature sensor is out of range, the thermostat will switch off the fan and close the valve, error code “E01” will be shown.

Language selection
You can change the display language with parameter No. 11.

Set time format

With parameter No. 8 the time format to 12h or 24h can be defined.

Time setting

Press the “ ” button, to set the time. The changing parameter is blinking, press “▲”or“▼”-button to set:
Order: Year→month→day date→day name→hour→minute→Timer ON hour minute→Timer OFF hour minute →year→…

In case of power loss, the time is backed up for max 2 years.

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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Set timer

Press the “ ”-button, the parameter to be changed is flashing, the timer will be set on or off.

Finish: Timer on, LCD display ;

Finish: Timer off, LCD display ;

Leave menu:

To delete timer on/off, press the “ ” button, the parameter to be changed is flashing. Then select “ ” or“ , set the time like the

following image to leave the timer mode: “ ”.

The system saves the user settings to set the timer on / off automatically.

Selection timer on / off

The timer on/off has 2 options to be selected: single action or rule.
To set, please look up parameter No. 9 in the parameter table.
7 days 4 periods programmable timer
One day is split into 4 periods. The user can set temperature for every period individually.
To set the time zones, please look up parameter No. 10 in the parameter table.
If the user has set a set temperature during operation, the current period runs with the last set temperature. The next period will adopt the changed
settings.
Please follow the instructions below:

Press the “ ” button for more than 5 seconds, the parameter to be changed is flashing. Press the “ ” button again, the value
needs to be changed, appears. (hour, minute, period). Changes in value by pressing ▲” or“▼”. The following 4 programmable periods
can be set.

→ hour → minute →temperature 1 → hour→ minute→ temperature 2

→ hour→ minute→ temperature 3 → hour → minute → temperature 4

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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» CONFIGURATION
Parameters

= MODE button
In order to change the parameters, please press the MODE button for more than 5 seconds. Please follow figure below. If you are asked to enter
the password, use “▲”or “▼” key to enter each digit of the password. Press MODE button to switch to the next digit.

The standard password is 260

If the password has been entered correctly, you will see the parameter settings screen as below shown:

Press the MODE button to select the parameter you would like to change. Then use “▲” or “▼” to change the parameter. Please refer to the
parameter table on the following page:

After parameter selection / setting, don’t press any button for 3 seconds to save the settings.

» COMMUNICATION MODBUS
For configuration of the Modbus communication, please look up parameter No. 18 in the parameter table.
Communication-section 1..247
Factory default: 1
Communication-Interface: RS485
Communication-Protocol: Modbus-RTU
Baud Rate: 4800 bps / 9600 bps / 19200 bps / 38400 bps (optional)
Factory default: 9600 bps
Parity: no parity / odd parity / straight parity (optional)
Factory default: no parity
Data: 8 bit
Stop: 2 bit

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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Press the MODE button to select the parameter you would like to change. Then use “▲” or “▼” to change the parameter. Please refer to the
parameter table on the following page: All parameters are stored within an EEPROM (electrically erasable programmable ROM), ensuring no data
loss if the Thermostat is powered off.

No. Name of parameter Parameter definition Factory default

1 Temperature offset: Range -20..+20 K 0
2 Key-lock: 00 = no lock 0
01 = on/off locked
02 = lock "mode"
03 = lock "on/off" and "mode"
04 = lock " clock "
05 = lock on/off and clock
06 = lock mode & clock
07 = lock on/off & mode & clock
08 = lock fan
09 = lock fan & on/off
10 = lock fan & mode
11 = lock fan & on/off & mode
12 = lock fan & clock
13 = lock fan & clock & on/off
14 = lock fan & clock & mode
15 = lock fan & clock & on/off & mode
16 = lock Temp
17 = lock Temp & on/off
18 = lock temp & Mode
19 = lock temp & on/off &mode
20 = lock Temp & clock
21 = lock temp & clock & on/off
22 = lock temp & clock &mode
23 = lock temp & clock &mode & on/off
24 = lock Temp & fan
25 = lock Temp & fan & on/off
26 = lock temp & fan & Mode
27 = lock temp & fan & on/off &mode
28 = lock Temp & fan & clock
29 = lock temp & fan & clock & on/off
30 = lock temp & fan & clock &mode
31 = lock temp & fan & clock &mode & on/off = lock all keys
3 Power failure: 0- stay power off 1
1- restore last status before power failure
2- turn power on after power failure
4 Upper temperature limit: Range: +1..+50 °C / +34..99 °F 30 °C / 86 °F
5 Lower temperature limit: Range: +1..+50 °C / +34..99 °F 16 °C / 60 °F
6 LCD backlight delay: 10..150 seconds 20 seconds
7 Screensaver mode: 0- display off 1
1- room temperature
2- display clock, room temperature
3- display on
8 Time format: 12- 12 hours 12
24- 24 hours
9 Timer on / off: 0- one-time (1 day) 0
1- recurring timer
10 7 days, 4 periods programmable: 0- deactivated 0
1- activated
11 Display language: 1- English 1
12 Temperature format: 0- °C 0
1- °F
13 Selection Fan Coil: 2- 2-pipe Fan Coil, heating/cooling 2
4- 4-pipe Fan Coil, heating/cooling
6- 2-pipe Fan Coil cooling+electric-heater
14 Auto cooling & heating modus: 0- deactivated 0
1- activated
15 Fan modus: 0- deactivated 1
1- activated
16 Fan on/off selective 0-valve stop does chain fan，1-Valve stop chain fan 0

17 Temporarily not defined 0

18 Communication: ID.1.. ID.247 1
19 Baud rate: 1- 4800 bps; 2- 9600 bps; 3- 19200 bps; 4- 38400 bps 2
20 Parity 0-no parity 1-odd parity 2-even parity 0
21 Summer/winter time 0-fordibben 1-allow 1
22 Individual password setting 001-999 260
23 Stopbit 1=1bit, 2=2bit 2
24 Infrared receiver (remote) 0 – deactivated, 1 - activated 0
25 Backlight in case of inactivity 0-25% (0=OFF) 15

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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» MODBUS FUNCTIONS AND REGISTERS

The device supports the following functions and registers

Holding Register:
Register address Description R/W Unit Options Function code
0 0x0000 mode Read / Write NC 1=cool,4=fan,8=heat,16=auto 0x000F
1 0x0001 fan speed Read / Write NC 2=low,4=medium,8=high,128=auto 0x03,00x06,0x10
2 0x0002 set point temperature Read / Write 0.1℃ 1-500(0x01F4),for example:265 and 0x03,00x06,0x10
26.5℃
3 0x0003 on/off Read / Write NC 0=stop，1=run 0x03,00x06,0x10
4 0x0004 temperature lower limit Read / Write 1℃ 1-50(0x0032) 0x03,00x06,0x10
default=16℃
5 0x0005 temperature upper limit Read / Write 1℃ 1-50(0x0032) default=30℃ 0x03,00x06,0x10
6 0x0006 Power failure Read / Write NC 0-keep off power on，1-Memo while the 0x03,00x06,0x10
power failure, 2-switch on while power on
Default=0
7 0x0007 Key-lock Read / Write NC see parameter table: binary notation 0x03,00x06,0x10
Temp=16=0x10
Fan=8=0x08
Clock=4=0x04
Mode=2=0x02
ON/OFF=1=0x01
8 0x0008 Backlight delay Read/Write s 10-150s，default=15s 0x03,00x06,0x10
9 0x0009 change over Read /Write 1℃ 12-24，default=19℃ 0x03,00x06,0x10
temperature cooling (2-
pipe + external temp.
sensor)
10 0x000A change over Read /Write 1℃ 25-45，default=30℃ 0x03,00x06,0x10
temperature heating (2-
pipe + external temp.
sensor)
11 0x000B Fan coil type Read /Write NC 2=cooling&heating 2-pipe 0x03,00x06,0x10
4=cooling&heating 4-pipe
,6=cooling+elec-heater,default=2
12 0x000C 7day 4periods Read /Write NC 0=forbidden,1=allowed ,default=0 0x03,00x06,0x10
programmable
13 0x000D time of the first Read /Write NC hour:min,BCD code data format 0x03,00x06,0x10
temperature zone e,g:08:30=0x0830
14 0x000E temperature setting of Read /Write 1℃ 16-30，default=25℃ 0x03,00x06,0x10
the first temperature
zone
15 0x000F time of the second Read /Write NC hour:min, BCD code data format 0x03,00x06,0x10
temperature zone e,g:14:00=0x1400
16 0x0010 temperature setting of Read /Write 1℃ 16-30，default=26℃ 0x03,00x06,0x10
the second temperature
zone
17 0x0011 time of the third Read /Write NC hour:min,e,g:20:00=0x2000 0x03,00x06,0x10
temperature zone
18 0x0012 temperature setting of Read /Write 1℃ 16-30，default=27℃ 0x03,00x06,0x10
the third temperature
zone
19 0x0013 time of the fourth Read /Write NC hour:min, BCD code data format 0x03,00x06,0x10
temperature zone e,g:02:00=0x0200
20 0x0014 temperature setting of Read /Write 1℃ 16-30，default=28℃ 0x03,00x06,0x10
the fourth temperature
zone
21 0x0015 Individual passwords Read /Write NC 001-999，defaul=260 0x03,00x06,0x10
setting
22 0x0016 Summer/winter time Read /Write NC 0=forbidden,1=allowed ,default=1 0x03,00x06,0x10
23 0x0017 system time-- year Read /Write NC 2000-2099，default=2015 0x03,00x06,0x10
24 0x0018 system time--month Read /Write NC 01-12 0x03,00x06,0x10
25 0x0019 system time--day Read /Write NC 01-31 0x03,00x06,0x10
26 0x001A system time-hour Read /Write NC 00-23 0x03,00x06,0x10
27 0x001B system time-minutes Read /Write NC 00-59 0x03,00x06,0x10
28 0x001C system time--seconds Read /Write NC 00-59 0x03,00x06,0x10
29 0x001D system week Read /Write NC 1=Sun ,2=Mon ,3=Tue ,4=Wed 5=Thu 0x03,00x06,0x10
6=Fri 7=Sat
30 0x001E IR receiver Read /Write NC 0=OFF, 1=ON 0x03,00x06,0x11

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Coil
Coil address Description R/W Unit Options Function
code
0 0x0000 working status Read -only NC 0=stop，1=run 0x01
1 0x0001 failure status Read -only NC 0:Non，1:failure 0x01
2 0x0002 VA1 status Read -only NC 0=stop，1=run 0x01
3 0x0003 VA2 status Read -only NC 0=stop，1=run 0x01
Read -only 0=stop，1=run(this function under
4 0x0004 electrical heating status NC 0x01
cooling+electr-heater is available
5 0x0005 low speed status Read -only NC 0=stop，1=run 0x01
6 0x0006 Medium speed status Read -only NC 0=stop，1=run 0x01
7 0x0007 high speed status Read -only NC 0=stop，1=run 0x01

Input Register
Address Description R/W Unit Options Function
code
0 0x0000 return air temperature Read -only 0.1℃ 0-500(0x01F4), for example:245 and 24.5℃ 0x04
1 0x0001 fan status Read -only NC 0=stop,2=low,4=medium,8=High 0x04
2 0x0002 VA1 status Read -only NC 0=stop，1=run 0x04
3 0x0003 VA2 status Read -only NC 0=stop，1=run 0x04
4 0x0004 electrical heating status Read -only NC 0=stop，1=runThis function under 0x04
cooling+electr-heater is available
5 0x0005 working status Read -only NC 0=stop，1=run 0x04
6 0x0006 failure status Read -only NC 0:failure-free， 0x04
1:room temperature sensor alarm
7 0x0007 fan coil type Read -only NC 2:cool&heat 2pipe, 0x04
4:cool&heat 4pipe,
6:cooling+electr-heater
8 0x0008 version Read -only NC 1010(0x03F2)-9999(0x270F),for 0x04
example:1322(0x0456) 13 | 22
communciation protocol version 1.3,
software version 2.2
9 0x0009 External temp sensor Read-only NC 0-00-500(0x01F4),e,g:245=24.5℃ 0x04

» DIMENSIONS (MM)
Display unit

Base plate

Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax: -400 · www.thermokon.com email@thermokon.de
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