Installation and Service

Instructions

AUTOMATIC
11.15am 71°F

T 180 160
AU
140
120

Boiler Controls For the installing contractor

Logamatic 2107 Please read carefully prior

to commissioning or
servicing.
6 720 618 142 - 08/2008 US/CA

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 Production

This product has been tested and is

certified for both the US and Canadian
markets and meets all applicable US and
Canadian standards.

Notice:

To match the typical building, the following factory

settings may need adjustment:

BLDG RESP: Change to 1 if typical 2x4 or 2x6

construction

MAX TEMP: Change to 185-190°F if high

temperature baseboard is used

OASETBACK: Change to SETBACK if no room

sensor is being used or
RMSETBACK if a room sensor is
present

Refer to page 10 for additional details.

2 Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.
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 Contents

1 Safety instructions and user notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Hazard symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3 Please observe these safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2 Setting parameters and display data for the Logamatic 2107 . . . . . . . . . . .7

3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.1 Mounting of the Logamatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.2 Installation of the Logabracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Logamatic 2107 controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Checking the manual reset high limit (STB) . . . . . . . . . . . . . . . . . . . . . . . 15

6 Using the service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.1 Calling up the service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 Calling up the menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Modifying settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1 System frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Type of building . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3 Setting the burner type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4 Minimum modulating output of the modulating burner . . . . . . . . . . . . . . . . . . . . 25
7.5 Operating time of the modulating burner actuator . . . . . . . . . . . . . . . . . . . . . . . 26
7.6 Pump logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.7 Maximum boiler temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.8 Language selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8 Heating circuit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.1 Heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 Reference design temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.3 DHW priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.4 Maximum heating circuit temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.5 Remote control ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.6 Maximum room temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.7 Setback mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.8 Room temperature offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9 Solar data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.1 Solar function ON/OFF (with FM 244 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.2 Maximum storage tank temperature in solar mode . . . . . . . . . . . . . . . . . . . . . . 45
9.3 Minimum storage tank temperature in solar mode . . . . . . . . . . . . . . . . . . . . . . . 46

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 3
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 Contents

10 DHW production ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

11 DHW recirculation pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

12 Heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

13 Running the relay test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

14 Performing an LCD test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15 Time, correcting the accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

16 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

17 Version number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

18 Sensor curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

19 Operating values at the service level/setup report . . . . . . . . . . . . . . . . . 59

20 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
20.1 Troubleshooting "NO HEAT" call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
20.2 Troubleshooting „INSUFFICENT HEAT“ call . . . . . . . . . . . . . . . . . . . . . . . . . 66
20.3 Troubleshooting Domestic Hot Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
21 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

4 Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.
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 Safety instructions and user notes 1

1 Safety instructions and user notes

This chapter contains general safety instructions, which

you should observe when installing and servicing the
Logamatic 2107 controls.

The other safety instructions that appear in other

sections of these service instructions must also be
followed exactly. The safety instructions always precede
the individual tasks. Read the safety instructions
carefully before carrying out the tasks described below.

The result of ignoring safety instructions can be severe

injury or even death, as well as damage to property and
the environment.

1.1 Intended use

Logamatic 2107 controls are used to control and monitor

heating systems in detached and terraced houses. The
Logamatic 2107 controls can be used to check and set
the room and DHW temperatures and to select and set
heating programs.

1.2 Hazard symbols

All safety instructions in these service instructions are

identified by the danger sign. A signal word is positioned
below this sign, which indicates the level of danger.
Always observe the measures prescribed to reduce the
risk of danger.

PRIORITY SAFETY INSTRUCTIONS

The term "Warning" refers to dangers,

WARNING!
which may lead to injury or death.

HAZARD - ELECTRICAL POWER

This symbol indicates a danger through

WARNING!
electrical power.

SAFETY INSTRUCTION – 2ND

PRIORITY

The term "Caution" refers to dangers,

CAUTION!
which may lead to material losses.

USER NOTE

User notes help you use and handle this

technology in the optimum, most
economical, safe and environmentally-
friendly manner.

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 5
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 1 Safety instructions and user notes

1.3 Please observe these safety

instructions

The Logamatic 2107 controls has been designed and

built in accordance with currently recognized standards SYSTEM DAMAGE
and safety requirements.
through inappropriate work on the
However, property damage resulting from inappropriate system.
handling of this device cannot be completely excluded. CAUTION!
z Only enter or change the operating
– Only operate the Logamatic 2107 controls for the values in accordance with the details
intended purpose and when it is in perfect working shown in these instructions.
order. Other inputs alter the control program
– Carefully read these service instructions before of the heating system and can lead to
starting any work on the controls. incorrect system functions.

Note the following safety instructions while using the

Logamatic 2107 controls.

RISK OF LIFE

from electric shock.

WARNING! z Prior to opening the controls, isolate
the system from the mains supply via
the boiler emergency shutoff switch or
the heating system circuit breaker.
z All tasks listed in these service
instructions, which require the opening
of the control panel, must only be
carried out by trained personnel.

SYSTEM DAMAGE

through frost.
CAUTION! z Frost protection is only active if the
controls is switched ON. Switch OFF
the controls and drain the water from
the boiler, the DHW tank and the pipes
of the heating system. The system is
only protected from frost, if it is
completely dry.

RISK TO LIFE
z In an emergency, switch OFF the
emergency shutoff switch outside the
WARNING!
boiler room.

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 Setting parameters and display data for the Logamatic 2107 2

2 Setting parameters and display data for the Logamatic 2107

Press the "Display" key and "Install" key at the same time to call up the service
level (see Chapter "Keys for extended functions", page 14).

Display
AMERICAN Language selection

BOILER Boiler parameters

FROST AO Freeze protection limit

BUILDING Building response

1 Burner type1
2-STAGE

MIN MOD2 Minimum modulation output2

TIME RUN2 Minimum burner run time2

PUMPLOGIC Pump logic threshold

MAX TEMP Maximum boiler switch-off temperature

CIRCUIT 01 Heating circuit 1 installation parameters (unmixed heating circuit)

PERIM HTG Heating system

REF TEMP Design temperature

REMOTE 1 Remote control ON/OFF

DIFF T3 Room temperature hook-up3

OA SETBACK Type of setback

OFFSET Room temperature offset

CIRCUIT 025 Heating circuit 2 installation parameters (mixed heating circuit)4

UND-FLOOR Heating system

REF TEMP Design temperature

DHW PR5 DHW priority5

MAX TEMP Maximum heating circuit temperature

REMOTE 2 Remote control ON/OFF

DIFF T3 Room temperature hook-up3

OA SETBACK Type of setback

OFFSET Room temperature offset

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 7
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 2 Setting parameters and display data for the Logamatic 2107

Display

SOLAR7

SLR FN ON Solar function ON/OFF

MAX SL SR Maximum storage tank temperature in solar mode

MIN SL SR Minimum storage tank temperature in solar mode

DHW PROD Domestic hot water ON/OFF

RECIRC PUMP5 DHW circulation pump5

HTG CURVE 1 Heating characteristic curve HK1

4
HTG CURVE 2 Heating characteristic curve HK24

RELAYS Relay test

BURNER (St.1) Burner relay stage 1

1 2
BURNER2 , MOD2 Burner relay1 stage 2, modulation output2

HTG1 PUMP Heating circuit pump (HZ1 unmixed)

HTG2 PUMP4 Heating circuit pump (HZ2 mixed)4

MIX VALVE4 Mixer4

DHW PUMP Tank DHW pump

RECIR PUMP DHW circulation pump

SLR PUMP7 Solar pump7

LCD TEST LCD test

TIME Time, accuracy

RESET Reset

VERSION Version number

1 Only if the FM 242 module is installed and 2-stage burner is selected.

2 Only if the FM 242 module is installed and modulating burner is selected.
3 Only if BFU remote control is installed.
4 Only if the FM 241 module is installed.
5 Only if DHW is installed.
6 Only if FM 241 module is installed and if heating circuit 2 is selected as an "UND-FLOOR" or "RADIATOR" heating system.
7 Only if FM 244 module is installed.

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 Installation 3

3 Installation

3.1 Mounting of the Logamatic

z On the GC124, G124X, GA124, G234X, G244, and G334X boilers remove
the front panel of the boiler.
z Remove rear top panel of the boiler by first unscrewing 2 screws at the rear
edge, then sliding rear panel backward to disengage the hooks.

z Remove the two screws at the top of the Logamatic, and lift up top cover.
z Insert the two front feet of the control into the holes provided on the top of the
boiler. Then, firmly push down on the rear of the control until it snaps into
place.

z Fasten the control to the boiler jacket using the two screws as shown.
z The sensor bundle consists of one thermistor (FK), two capillaries and a
spacer. Mount the sensors per the following boiler specific instructions.
Use the chrome well supplied with the Logamatic.

z G115, G125, GB125, G215, G315: Replace brass well with chrome
Logamatic well. The sensor bundle must be fully inserted into the Logamatic
well.
z GC124, G124X, GA124, GA244, GA334X: Unwrap the sensor bundle.
Remove spacers from the chrome well on the boiler. Remove outer sleeve
from one capillary. Insert both capillaries and thermistor into the chrome well
together with Honeywell capillary.
z G234: The tridicator assembly should be moved to the supply piping and
replaced with the chrome plated Logamatic well. The sensor bundle must be
inserted into this well.

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 9
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 3 Installation

z Electrical connections must be made according to the wiring diagrams.

z All the wires should be routed through the cable raceway at the rear of the
boiler. If using conduit install a Logabracket (page 11). The rear panel jacket
may be modified per local code. Route the wires on top of the insulation from
the back of the boiler to the back of the controls.

z Use the white strain relief brackets provided to lock all cables into place on
the back of the control.

z Tilt the display to the desired position.

z Replace the top housing of the controls and fasten the two screws. The
control is ready to be placed into operation.

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 Installation 3

3.2 Installation of the Logabracket

The Logabracket is designed to create strain relief for your line voltage and low
voltage wiring for the 2107 Logamatic controls. The bracket is mainly designed
for use with the G115, G125, GB125 and G124X boilers, but with minor
modifications can be used on other boiler models as well.

G115, G125, GB125, G124X, GC124

Line the bracket up with holes, place the Logamatic in place over the holes and
secure with screws provided.

Four conduit connections are provided for line voltage wiring; a slotted opening
is used to run low voltage sensor wiring.

G215

It is necessary to bend down the tabs on the rear jacket panel to prevent
interference between bracket and jacket panel.

G234X, G334X

Simply cut off the tabs of the bracket and mount on the rear panel by drilling an
additional hole for a second mounting screw.

GA124, GA244

These boilers do not require the bracket as strain relief connections are provided
on the rear of the boiler.

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 11
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 4 Logamatic 2107 controls

4 Logamatic 2107 controls

Introduction to the user interface of the Logamatic 2107 controls.

9 8
10

AUTOMATIC 7
11.15am 71

6
T 180 160
AU

140
120

T 180 160
AU
140
120

1
3 5
2
4

Fig. 1 Controls on the Logamatic 2107 controls

Item 1: Manual reset high limit (STB)
Item 2: Boiler water thermostat
Item 3: Fuse (10 Amp)
Item 4: Switch for Automatic mode, Emergency mode
Item 5: ON/OFF switch
Item 6: Keys for basic functions
Item 7: Dial
Item 8: Keys for extended functions
Item 9: Display
Item 10: Flap

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 Logamatic 2107 controls 4

Keys for basic functions

You can control the basic functions using this keypad.

1 2 3 4
Fig. 2 Keypad for basic functions
Item 1: Automatic mode following a program
Item 2: Normal heating mode (day mode)
Item 3: Flue gas test (for measuring flue gases)
Item 4: Setback heating mode (night mode)

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 4 Logamatic 2107 controls

Keys for extended functions

This keypad is located behind the flap.

1 2 3 4 5 6

11 10 9

Fig. 3 Keypad for extended functions

Item 1: "Weekday" key – Enter the day of the week
Item 2: "Vacation" key - Set vacation function
Item 3: "Time" key – Set the time
Item 4: "PROG" key – Select program
Item 5: "WWSD" key
Item 6: "Temp" key – Select temperature values
Item 7: "DHW" key – Enter the domestic hot water
temperature
Item 8: "Heating circuit" key – Call up the heating circuits
Item 9: "Enter" key – Back to standard display
Item 10: "Install" key – Call up the service level
Item 11: "Display" key – Select the standard display

This keypad is used, for example, to enter the day, set the time, select
temperature values, etc.

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 Checking the manual reset high limit (STB) 5

5 Checking the manual reset high limit (STB)

USER NOTE

Check the STB after the initial installation, and after every service.

z Switch on the system.

+ z Press the "Display" key and "Install" key at the same time to call up the
service level. "AMERICAN" appears as the first main menu.

Turn the dial until "RELAY" is shown.

RELAY

Hold down the "Display" key and turn the dial, until "BURNER ON" appears in
the display.

The burner starts running.

BURNER °F Release the "Display" key.

ON
z Remove the dial on the boiler water thermostat (Fig. 4).

T 180 16
0
AU
140
120

Fig. 4 Remove the dial on the

boiler aquastat.

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 5 Checking the manual reset high limit (STB)

z Push the lever or key (depending on the type of STB) back with a screwdriver
or similar device and hold until the high limit safety cut-out has triggered
1 (Fig. 5).

Fig. 5 Triggering the manual reset

high limit
Item 1: Key
Item 2: Lever
Terminating or exiting the test

Press "AUT".
Reattach the dial and turn it to the "AUT" position.

z To reset the manual reset high limit, remove the cover on the STB and press
the reset button located beneath it (Fig. 6).

1...7
Tag Zeit Temp
PROG
Urlaub Auswahl So/Wi

Anzeige Install Zurück

AUT 70
90
60

I 0
50

Fig. 6 Remove the STB cover.

Item 1: STB cover.

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 Using the service level 6

6 Using the service level

Access to the service level is password protected.

The service level must only be used by trained heating contractors.

Unauthorized access invalidates your warranty.

SYSTEM DAMAGE

through inappropriate work on the system.

CAUTION! z Only enter or change the operating values in accordance with the details
shown in these instructions. Different values will change the heating
system control programs and can cause the system to malfunction.

6.1 Calling up the service level

The controls marked in grey are used for this function.

You will need a pointed object, such as a ball-point pen, to press the "Install"
button.
Press the "Display" key and "Install" key at the same time to call up the service
+ level.

Release both keys. The selected language, e.g. "AMERICAN", is displayed in

AMERICAN the first main menu.

The service level is now activated.

USER NOTE

The unit automatically returns to the standard display if no settings are made
within 5 minutes.

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 17
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 6 Using the service level

6.2 Calling up the menu

Press the "Display" key and "Install" key at the same time to call up the service
level. Release both keys. Once you have called up the service level, you can
+
access all the setting options it contains.

The service level is broken down into main menus and submenus.

You can scroll through the main menu level by turning the dial.
AMERICAN
BOILER

CIRCUIT 01

Press the "Display" key to access the submenu.

CIRCUIT 1

PERIM HTG

REF TEMP

REMOTE

Press the "ENTER" key to return to the higher-level menu.

CIRCUIT 1

PERIM HTG

Press the "AUT" key to exit the service level.

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 Using the service level 6

6.3 Modifying settings

When you press the "Display" key in a submenu, the setting parameter to be
changed flashes. Hold down the "Display" key and turn the dial at the same time
+
to change the parameter. The new value will be stored after you release the
"Display" key.

Some parameters are only displayed if the relevant modules are installed
(module FM 241– mixer, FM 242– 2-stage burner, FM 244 – solar module). The
controls detects the modules and enables the parameters.

Return to the standard display

Press "ENTER".

The unit automatically returns to the standard display if no key is pressed within
5 minutes.

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 7 General data

7 General data

USER NOTE
"PUMP KICK"

In all operating modes, all the pumps are switched on and then off again for
10 seconds every Wednesday at 12 noon to prevent pump damage. This is
followed by a brief 5 second pause, then the mixing valves are set to "OPEN"
for 3 minutes. All pumps then return to normal operation.

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 General data 7

7.1 System frost protection

The controls is equipped with a system frost protection function.

If the outdoor temperature drops beneath the frost protection limit, the heating
system pump (contacts 61/63) will be started.

The factory default for the frost protection limit is an outdoor temperature of
41°F (5°C).

The setting applies to all heating circuits.

Changing the system frost protection

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

FREEZE TEMP °F
41
Hold down the "Display" key and turn the dial until the desired value appears
+
(in this case "41°F").

FREEZE TEMP °F Release "Display" to store your input.

43
Press "ENTER" to return to the next higher level.

USER NOTE

The value of the "OASETBACK" setback type is also limited to the freeze
protection limit. The setting applies to all heating circuits.

Input range Factory setting

System frost protection -4°F – 50°F (-20°C – 10°C) 41°F (5°C)

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 7 General data

7.2 Type of building

Outdoor temperature in °F (°C)

79 (26)
75 (24)
72 (22)
68 (20)
64 (18)
61 (16)
57 (14) 1
54 (12)
2
50 (10)
46 (8)
43 (6)
12am 3am 6am 9am 12pm 3pm 6pm 9 pm

Time in hours

Fig. 7 Thermal delay

Item 1: Current outdoor temperature
Item 2: Adjusted outdoor temperature

The building type is used to take into account the heat storage capacity of the
building's mass and the thermal inertia of the building compared to fluctuations
in the outdoor temperature. The lighter the building and the thinner its insulation,
the faster the controls will respond to changes in outdoor temperature (known
as "adjusted outdoor temperature calculation").

It is the adjusted outdoor temperature value that is used for the warm weather
shutdown (WWSD) and to calculate the supply temperature using the
characteristic heating curve (Fig. 7).

For building type three levels are available:

– Building response 1 (low)
Buildings with small heat storage capacity and low to medium levels of
insulation, e.g. 2x4 wood frame or prefabricated construction with typical
insulation.

– Building response 2 (medium)

Buildings with medium heat storage capacity and high levels of insulation,
e.g. 2x6 wood frame or cinder block construction with above average
insulation.

– Building response 3 (high)

Massive buildings with high heat storage capacity and high levels of
insulation, e.g. poured concrete, heavy brick or heavy cinder block
construction with excellent insulation.

Note: In areas where rapid changes in outdoor temperature occur, choose

Building Response 1.

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 General data 7

Changing the type of building

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

Turn the dial until "BLDG RESP" is shown.

BLDG RESP
2
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "1").

BLDG RESP Release "Display" to store your input.

1
Press "ENTER" to return to the next higher level.

Input range Factory setting

1 (low)
Building response 2 (medium) 2
3 (high)

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 7 General data

7.3 Setting the burner type

The basic 2107 controls single stage burners. To use it with 2-stage or
modulating burners install a FM 242 burner module.

When the FM 242 burner module is installed, the factory default changes from
"1-STAGE" to "2-STAGE".

With 2-stage burners, the operating hours are displayed separately for stage 1
and stage 2.

Changing the burner type

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

Turn the dial until "2-STAGE" is displayed.

2-STAGE

Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "MODULATE") is displayed.

MODULATE Release "Display" to store your input.

Press "ENTER" to return to the next higher level.

Input range Factory setting

Burner system without burner module FM 242 – 1-stage

Burner system with burner module FM 242 1-stage/2-stage/modulating 2-stage

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 General data 7

7.4 Minimum modulating output of the

modulating burner

The modulating output requires the burner module FM 242 and "MODULATE"
burner setting.

The factory default is "30 %", i.e. the burner modulates its set output within an
output range of 30-100 %.

USER NOTE

The data can be found in the technical documentation for the installed burner.

Changing the minimum modulation

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

Turn the dial until "MIN MOD" is shown.

MIN MOD
30
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "40").

MIN MOD Release "Display" to store your input.

40
Press "ENTER" to return to the next higher level.

Input range Factory setting

minimum modulation output 10 %–60 % 30 %

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 7 General data

7.5 Operating time of the modulating

burner actuator

This feature requires the burner module FM 242 and "MODULATE" burner
setting.

The factory default is "12 seconds".

USER NOTE

The data can be found in the technical documentation for the installed burner.

Changing the operating time of the actuator

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

Turn the dial until "MOD TIME" is shown.

MOD TIME
12
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "15").

MOD TIME Release "Display" to store your input.

15
Press "ENTER" to return to the next higher level.

Input range Factory setting

Operating time of the actuator 5 – 60 seconds 12 seconds

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 General data 7

7.6 Pump logic

To protect the boiler against corrosion from condensation inside the combustion
chamber, the boiler pump (while the burner is running) will not start until the
boiler water has reached a certain temperature.
The temperature can be set using the "PUMPLOGIC" parameter.
The factory default is 104°F (40°C), which is recommended for cast iron boilers.

Recommendation:
If a condensing boiler is used, the parameter should be set to 60°F (15°C) in
order to make optimum use of the condensing technology.
NOTE: The GB125BE requires a pumplogic of 104°F (40°C) due to its cast iron
primary heat exchanger.

Changing the pumplogic temperature

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

Turn the dial until "PUMPLOGIC" is shown.

PUMPLOGIC °F

104
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case 122°F (50°C)).

PUMPLOGIC °F Release "Display" to store your input.

122
Press "ENTER" to return to the next higher level.

Input range Factory setting

Pump logic for
104°F (40°C)
1-stage 60°F – 140°F
113°F (45°C)
2-stage (15°C – 60°C)
122°F (50°C)
Modulating burners

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 7 General data

7.7 Maximum boiler temperature

The maximum boiler temperature is the highest target temperature the boiler will
reach. The burner should switch off no later than when this temperature is
reached (this applies to heating mode and DHW mode).

The factory default is 176°F (80°C).

Changing the maximum OFF temperature

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "BLR TEMP" is shown.

Press "Display" to call up a submenu.

"FREEZE TEMP" appears.

Turn the dial until "MAXTEMP 1" is shown.

MAXTEMP 1 °F

176
Hold down "Display" and turn the dial until the required
+
value appears (in this case 167°F (75°C)).

MAXTEMP 1 °F Release "Display" to store your input.

167
Press "ENTER" to return to the next higher level.

USER NOTE

Ensure that the boiler water aquastat dial is set above the maximum boiler
temperature, as it will overwrite the maximum boiler temperature.

Input range Factory setting

158°F – 210°F
Maximum OFF temperature 176°F (80°C)
(70°C – 99°C)

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 General data 7

7.8 Language selection

Press the "Display" key and "Install" key at the same time to call up the service
level. Release both keys. The selected language, e.g. "AMERICAN", is
displayed in the first main menu. The factory setting for the language is
AMERICAN "AMERICAN". Now hold down the "Display" key and turn the dial to set the
language. Release the "Display" key to store the set language.

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 8 Heating circuit data

8 Heating circuit data

8.1 Heating system

The controls is designed for 2 heating circuits. The basic 2107 supports 1
heating circuit, which can be upgraded to 2 heating circuits using the
FM241card.
– Circuit 01 = unmixed heating circuit, no heating circuit, perimeter heating

– Circuit 02 = mixed heating circuit, no heating circuit, perimeter heating,

radiant floor heating

The factory setting is:

Circuit 01 Perimeter heating

Circuit 02 Radiant floor heating

If the right heating system is selected, the other heating circuit parameters are
preset. They must still be verified, however.

Further information on this can be found on the next page.

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 Heating circuit data 8

Changing the heating system

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 01" or "CIRCUIT 02" is displayed.

"CIRCUIT 01" setting (heating circuit without mixing valve)

CIRCUIT 01

Press "Display" to call up a submenu.

"PERIM HTG" appears.

PERIM HTG

Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "NO SYSTEM") is displayed.

NO SYSTEM

Press "ENTER" to return to the next higher level.

USER NOTE

If there is only one heating circuit with mixing valve present (HK2), circuit 1 must
be set to "NO SYSTEM".
If the "NO SYSTEM" setting is used, all of the following settings are hidden for
this circuit.

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 8 Heating circuit data

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 01" or "CIRCUIT 02" is displayed.

"CIRCUIT 02" setting (heating circuit with mixing valve)

CIRCUIT 02

Press "Display" to call up a submenu.

"RADIATOR" appears.

FLOOR HTG

Input range Factory setting

NO SYSTEM
Heating circuit 1 PERIM HTG
PERIM HTG

NO SYSTEM
Heating circuit 2 FLOOR HTG
FLOOR HTG

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 Heating circuit data 8

8.2 Reference design temperature

The reference design temperature is the boiler supply temperature required by

the structure and the heating system to achieve the target room temperature at
an outdoor temperature of 14°F (-10°C).

The reference design temperature helps define the characteristic heating curve
which is the basis for outdoor reset.

It follows the idea that the colder the weather, the greater the heat loss of a
structure, and the higher a boiler supply temperature needed to compensate for
the resulting losses.

REF TEMP °F

167
The factory default setting results in a characteristic heating curve as shown
2 (Fig. 8, Item 1).
Boiler supply temperature [°F(°C)]

194 (90)

176 (80) The reference design temperature (Fig. 8, Item 2) is used to adjust the heating
167 (75)
curve. Depending on the measured outdoor temperature, the boiler supply
158 (70) 1
140 (60)
temperature is changed in order to keep the room temperature stable and save
as much on fuel as possible (Fig. 8).
122 (50)

104 (40) When changing the reference design temperature, the gradient of the heating
86 (30)
curve is adjusted.
68 (20)
68 60 50 41 32 23 14 +5
(+20) (+15) (+10) (+5) (±0) (-5) (-10) (-15)

Outdoor temperature [°F(°C)]

Fig. 8 Determining the heating

curve

Example (Fig. 9):

Boiler supply temperature [°F(°C)]

194 (90)
Design temperature 140°F (60 °C) for +5°F (-15 °C) outdoor temperature.
176 (80)
167 (75) A boiler temperature of 140°F (60°C) is achieved by setting the reference design
158 (70)
temperature to 133°F (56°C) (at an outdoor temperature of 14°F (-10°C)),
140 (60)

122 (50) The reference design temperature can be set from 86 to 194°F (30 to +90°C).
104 (40)

86 (30)

68 (20) Further information on this can be found on the next page.

68 60 50 41 32 23 14 +5
(+20) (+15) (+10) (+5) (±0) (-5) (-10) (-15)

Outdoor temperature [°F(°C)]

The factory setting is:
With PERIM HTG: 167°F (75°C)
Fig. 9 Determining the heating With FLOOR HTG: 113°F (45°C)
curve

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 8 Heating circuit data

Changing the reference design temperature

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 01" or "CIRCUIT 02" is displayed.

Press "Display" to call up a submenu.

"PERIM HTG" or "FLOOR HTG" appears.

Turn the dial until "REF TEMP" is shown.

REF TEMP °F

167
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case 133°F (56°C)).

REF TEMP °F Release "Display" to store your input.

133
Press "ENTER" to return to the next higher level.

Input range Factory setting

Reference design temperature for PERIM HTG 86 – 194°F (30 – 90°C) 167°F (75°C)
Reference design temperature for FLOOR HTG 86 – 140°F (30 – 60°C) 113°F (45°C)

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 Heating circuit data 8

8.3 DHW priority

For the heating circuit 02 with mixing valve (if installed), you can set the DHW
priority or DHW heating in parallel to the heating mode.

Please note that if you select DHW heating in parallel to heating mode, it will take
longer to recharge the tank.

The factory setting is:

For DHW priority: "ON"

USER NOTE

For heating circuit 01 the DHW priority is always ON and cannot be disabled.

Changing the DHW priority

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 02" is displayed.

Press "Display" to call up a submenu.

"PERIM HTG" or "FLOOR HTG" appears.

Turn the dial until "DHW PRIOR" is shown.

DHW PRIOR
ON
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "OFF").

DHW PRIOR Release "Display" to store your input.

OFF
Press "ENTER" to return to the next higher level.

Input range Factory setting

ON
DHW priority ON
OFF

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 8 Heating circuit data

8.4 Maximum heating circuit temperature

The maximum heating circuit temperature is a target temperature that should not
be exceeded in the heating circuit.

The factory setting is:

With PERIM HTG system: 194°F (90°C)
With FLOOR HTG system: 122°F (50°C)

This setting is only available for heating circuit 2.

Changing the maximum heating circuit temperature

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "HEAT CIRC 2" is displayed.

Press "Display" to call up a submenu.

"PERIM HTG" or "FLOOR HTG" appears.

Turn the dial until "MAX TEMP" is shown.

MAX TEMP °F

194
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case 140°F).

MAX TEMP °F Release "Display" to store your input.

140
Press "ENTER" to return to the next higher level.

Input range Factory setting

Maximum heating circuit temperature for PERIM

68 – 194°F (20°C – 90°C) 194°F (90°C)
HTG
Maximum heating circuit temperature for
68 – 140°F (20°C – 60°C) 122°F (50°C)
FLOOR HTG *)

*) This function does not replace the safety thermostat for switching of the pump
for radiant heating circuit.

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 Heating circuit data 8

8.5 Remote control ON/OFF

A BFU (accessory) remote control allows to easily control a heating system from
the living space.

If the controller is equipped with a BFU remote control, the remote control must
be activated and assigned to the appropriate heating circuit.

Instructions for assigning the remote control to the required heating circuit
(HK1 or HK2) can be found in the remote control operating instructions.

The factory setting is:

For remote control: "OFF"

USER NOTE

Faulty communication is indicated by the LEDs flashing on the remote control.

Activating the remote control

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "HEAT CIRC 1" or "HEAT CIRC 2" is displayed.

Press "Display" to call up a submenu.

"RADIATOR" or "UND-FLOOR" appears.

Turn the dial until "REMOTE 1" for heating circuit 1 or "REMOTE 2" for heating
circuit 2 is displayed.

REMOTE 1
OFF
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "ON").

REMOTE 1 Release "Display" to store your input.

ON
Press "ENTER" to return to the next higher level.

Further information on this can be found on the next page.

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 8 Heating circuit data

If the remote control is active, the desired room temperature for day and night
mode must be entered on the remote control, rather than via the controls.

The "AUT", "Day mode" and "Night mode" keys on the controls also are disabled
for this heating circuit with remote control.

If you press the "Temp", "AUT", "Day mode" or "Night mode" key, "REMOTE"
appears on the display if the remote control is active.

All settings can then only be made via the remote control.

Input range Factory setting

OFF
Remote control OFF
ON

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 Heating circuit data 8

8.6 Maximum room temperature

compensation

The room temperature compensation adjusts the calculated outdoor reset

heating curve according to the measured room temperature.
Any deviations from the room setpoint are then corrected immediately by
adjusting the boiler setpoint temperature accordingly.

USER NOTE

The maximum room temperature hook-up determines the range within which
deviations from the room setpoint value may be corrected. Influencing factors
such as open windows or additional heat sources, e.g. wood burning stove,
open fireplace, are thus eliminated in the area where the remote control is
installed. If other rooms are supplied with heat via this heating circuit, then the
aforementioned influencing factors can cause these near-by rooms to be
supplied with insufficient heat. The function should be set to "OFF" to eliminate
the chance of insufficient supply.

The maximum differential temperature can only be entered if the remote control
has been activated. The influence of the room temperature on the DHW
temperature (heating curve) is thus limited.

USER NOTE

If you entered "OFF", the room temperature no longer has any influence on the
supply temperature (heating curve).
This setting is generally recommended for FLOOR HTG systems.

The factory setting is:

With FLOOR HTG system: 6°F (3°C)

Further information on this can be found on the next page.

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 8 Heating circuit data

Changing the differential temperature

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 01" or "CIRCUIT 02" is displayed.

Press "Display" to call up a submenu.

"PERIM HTG" or "FLOOR HTG" appears.

Turn the dial until "ROOM COMP" is shown.

ROOM COMP °F

6
Hold down the "Display" key and turn the dial until the desired value appears (in
+
this case "OFF").

ROOM COMP Release "Display" to store your input.

OFF
Press "ENTER" to return to the next higher level.

Input range Factory setting

OFF
Differential temperature 6°F (3°C)
2 – 18°F (1°C – 10°C)

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 Heating circuit data 8

8.7 Setback mode selection

The Logamatic 2107 control contains night setback capability and allows you to
select from 4 different types or modes of night setback for customized operation.
These setback modes differ in their operation.

Night Setback Options

1 Boiler Off ("BLR OFF")

In this mode the heating system shuts down completely during the night time as
BLR OFF long as the outdoor temperature exceeds the "FREEZTEMP" setting. Below the
"FREEZTEMP" value, the circulators run in freeze protection mode. The boiler
only fires if the water temperature drops below 41°F (5°C). No room sensors are
used in this setback mode.

2 General Setback ("SETBACK")

SETBACK The heating circulators continue operation in the "SETBACK" mode; the boiler
operates on a lower heating curve and fires the burner as needed. This mode is
generally used when no room sensors are present and individual zones are
controlled by conventional thermostats.

3 Room Setback ("RMSETBACK")

This setback mode should only be selected when a room sensor is installed and
RMSETBACK activated. The system operates to maintain the desired night time temperature
as specified on the room sensor. The circulators will operate continuously when
the outdoor temperature is below the "FREEZTEMP" setting; the circulators shut
down when the outdoor temperature is above the "FREEZTEMP" setting and the
actual room temperature exceeds the night time setting.

4 Outdoor Air Setback ("OASETBACK"), factory default

The heating system (burner and heating circulators) shuts down in night mode
OASETBACK if the outdoor temperature exceeds the "FREEZTEMP"; if the outdoor
temperature drops below the "FREEZTEMP", the heating system operates on a
setback curve. This mode should only be used on buildings not occupied in the
night mode; i.e. commercial and daytime use only buildings. A room sensor is
generally not used in this application.

Recommended setting

Heating circuit with constant circulation zone:

RMSETBACK (Requires room sensor)
Heating circuit with ONlOFF thermostats:
SETBACK (No room sensor present)
Commercial (day use only) buildings:
OASETBACK

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 8 Heating circuit data

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 01" or "CIRCUIT 02" is displayed.

Press "Display" to call up a submenu.

"PERIM HTG" or "FLOOR HTG" appears.

Turn the dial until "OASETBACK" is displayed.

OASETBACK

Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "OASETBACK").

RMSETBACK Release "Display" to store your input.

Press "ENTER" to return to the next higher level.

Input range Factory setting

Outdoor setback
Room setback
Type of setback Outdoor setback
Setback
Boiler off

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 Heating circuit data 8

8.8 Room temperature offset

If no remote control is installed in the living area, the room temperature
compensation (see Chapter 8.6 "Maximum room temperature compensation"
page 39) cannot be used. The room temperature values set on the controls then
simply provide a specification for calculating the boiler setpoint temperature.
If the room temperature shown on the display differs from the room temperature
measured with a thermometer mounted nearby, the values can be adjusted
using "OFFSET".
Do not take the measurements while the system is heating up, e.g. after the
night setback, but only after it had time to stabilize for several hours.
The adjustment causes a parallel shift in the heating curve.
The factory setting is:
Offset: 0°F (0°C)

for
. example: Displayed room temperature 72°F (22°C)
Measured room temperature 75°F (24°C)
Offset -3°F (-2°C)

Matching temperature values

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "CIRCUIT 01" or "CIRCUIT 02" is displayed.

Press "Display" to call up a submenu.

"PERIM HTG" or "FLOOR HTG" appears.

Turn the dial until "OFFSET" is shown.

OFFSET °F

0
Hold down the "Display" key and turn the dial until the required value appears
+ (in this case "-3°F").

OFFSET °F Release "Display" to store your input.

-3
Press "ENTER" to return to the next higher level.

Input range Factory setting

OFFSET -9 – +9°F (-5°C – +5°C) 0°F (0°C)

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 9 Solar data

9 Solar data

9.1 Solar function ON/OFF

(with FM 244 only)

The Solar function menu option is used to optimize the solar gain and minimize
the use of fossil fuel.

To achieve this, the controllers for the solar heating system and the conventional
heating boiler are combined in a single unit. The controls monitors the current
solar gain and the stored heat in the DHW tank, and reduces the setpoint
temperature in the standby part of the DHW tank to prevent it being reheated
unnecessarily.

Switching off the solar function

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until the "SOLAR" main menu appears.

Press "Display" to call up a submenu.

"SOLAR ON" appears.

SLRFN ON

Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "SLRFN OFF").

SLRFN OFF Release "Display" to store your input.

Press "ENTER" to return to the next higher level.

Input range Factory setting

ON
SOLAR ON
OFF

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 Solar data 9

9.2 Maximum storage tank temperature in

solar mode

The solar heating system will collect all solar heat that can be harvested. It will
only stop when there is not sufficient insolation or to protect the tank from
overheating. When "MAX SOL T" is reached at the top tank sensor FB, the solar
pump is switched off.

RISK OF SCALDING

The DHW temperature can be set to a maximum of 194°F (90°C). At DHW

WARNING!
temperatures over 122°F (50°C) there is a risk of scalding at the taps if no
thermostatic mixing valve (anti-scald device) has been installed.
z If the DHW temperature is set above 122°F (50°C), you should only draw
off mixed hot and cold water.

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until the "SOLAR" main menu appears.

Press "Display" to call up a submenu.

"SOLAR ON" appears.

Turn the dial until "MAX-SL SR" appears.

MAX-SL SR °F

167
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "194°F").

MAX-SL SR °F Release "Display" to store your input.

194
Press "ENTER" to return to the next higher level.

USER NOTE

Take the lime content of the local drinking water into consideration when
determining the "MAX-SL SR" setting in order to prevent the tank scaling up.

Input range Factory setting

Max sol T 140 – 194°F (60°C – 90°C) 167°F (75°C)

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 9 Solar data

9.3 Minimum storage tank temperature in

solar mode

The DHW temperature to be generated by the boiler for a given solar gain
(DHW setpoint, see operating instructions for the settings) may be automatically
reduced so that the tank can be charged the solar heating system. The
"MIN SOL T" parameter contains the lower limit to which the temperature may
fall. If the temperature of the DHW in the tank (FB sensor) falls below the value
set here, then it is recharged by the boiler. The DHW setpoint temperature to be
generated by the boiler is lowered no further than "MIN SL SR".

The lowering function is deactivated in the "OFF" position (factory default).

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until the "SOLAR" main menu appears.

Press "Display" to call up a submenu.

"SLRFN ON" appears.

Turn the dial until "MIN SL SR" appears.

MIN SL SR °F

100
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "130°F").

MIN SL SR °F Release "Display" to store your input.

130
Press "ENTER" to return to the next higher level.

Input range Factory setting

86 – 130°F (30°C – 54°C)
MIN SL SR OFF
OFF

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 DHW production ON/OFF 10

10 DHW production ON/OFF

If the heating system is equipped with a DHW tank, DHW heating must be
activated. The factory setting is "ON".
If no DHW heating is installed, it should be disabled to avoid the DHW SENSR
ERR error message.
The controls starts the burner if necessary in order to heat the DWH. The DHW
tank charging pump runs. Once the burner has been switched off, the controls
uses the residual heat in the boiler to heat the DHW.
Once the set DHW temperature is reached, the DHW tank charging pump is
switched off. Normal heating mode is resumed at the end of the DHW heating
cycle.
A recirculation pump (if installed) may be controlled if the DHW heating is
activated.

Switching off the DHW heating

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "DHW PROD" is shown.

DHW PROD
ON
Hold down the "Display" key and turn the dial until the required value appears
+
(in this case "OFF").

DHW PROD Release "Display" to store your input.

OFF
Press "ENTER" to return to the next higher level.

Input range Factory setting

OFF
DHW production ON
ON

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 11 DHW recirculation pump

11 DHW recirculation pump

The DHW recirculation pump ensures a constant supply of hot water to the taps.
It is automatically activated with DHW heating and the pump runs in intermittent
or continuous mode if at least one heating circuit is in normal heating mode (day
mode), or if DHW heating is in day mode.
The DHW recirculation pump runs continuously in the "ON" position.
The factory default is "2", i.e. 2 pump runs per hour, running for 3 minutes each
time (Fig. 10).

3 minutes 3
ON

OFF
1 hour

Fig. 10 Illustration of the DHW recirculation pump running time with factory setting 2

The intermittent mode may be set to 1 to 6 pump starts per hour in order to
minimize the operating costs of the recirculation pump. This setting saves
energy while ensuring comfort.

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 DHW recirculation pump 11

Changing the recirculation pump run time

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until the "RECIRCPUMP 2" main menu is displayed.

RECIRCPUMP
2
Hold down the "Display" key and turn the dial anti-clockwise until the required
+
value appears (in this case "4").

RECIRCPUMP Release "Display" to store your input.

4
Press "ENTER" to return to the next higher level.

Input range Factory setting

DHW recirculation pump OFF
1
2
3
2
4
5
6
ON

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 12 Heating curve

12 Heating curve

The heating curve test is used to display the DHW temperature for the current
operating status at external temperatures 50°F (+10°C), 32°F (±0°C) and 14°F
(-10°C).
The heating curve displayed here (Fig. 11) is calculated by the controls on the
basis of the values set for design temperature, offset and setpoint room
DHW temperature in °F (°C)

Heating curve temperature, and corresponds to the currently active characteristic. To ensure
that there is no shift during commissioning, ensure during commissioning that:
167 (75)
the heating circuit is in "day mode"
144 (62)
(press the "Day" key),
113 (45)

the heating circuit is in "automatic mode"

("WWSD" key).
50 (+10) 32 (0) 14 (-10)
The heating curve changes when room temperature hook-up is activated.
Outdoor temperature in °F (°C)
Fig. 11°FHeating
(°C) curve test Displaying the heating curve

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "HTG CURVE 01" for heating circuit 1 or "HTG CURVE 2" for
heating circuit 2 (mixed circuit) is displayed.

HTG CURVE
01
Hold down "Display" and turn the dial. The first display contains the DHW
+ temperature at 50°F (+10°C), the second at 32°F (±0°C) and the third
at 14°F (-10°C).

HTG CURVE °F
113 50
HTG CURVE °F
144 32
HTG CURVE °F Release the "Display" key to return to the next higher level.

167 14

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 Running the relay test 13

13 Running the relay test

The relay test is used to check that the switching relays in the controls are
working correctly.

SYSTEM DAMAGE

due to controller functions being deactivated for the duration of the relay test.
CAUTION!
The heat supply to the system is not guaranteed, so it is essential to press the
"ENTER" key at the end of the relay test to exit the relay test function and thus
avoid damaging the system.

The displays differ according to which modules are installed in the controls. The
following relays can be called up:
z Burner 1st stage / 2nd stage
z Modulation open/closed OFF
z Boiler system pump HK1
z Heating circuit pump HK 2
z Mix valve open/closed/OFF
z Tank DHW pump
z DHW recirculation pump
z Solar pump

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 13 Running the relay test

Steps of the relay test

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "RELAY" is shown.

RELAY

Press "Display" to call up a submenu.

"BURNER" appears.

Hold down the "Display" key and turn the dial, until "BURNER ON" appears in
+ the display.

Release the "Display" key.

The burner starts up.

BURNER If the burner is working correctly and the operating hours signal has been
returned by the burner, an "h" appears in the display.
h ON Turn the dial to display all the relay functions in succession.

Press "ENTER" to return to the next higher level.

The relay switching states are represented by symbols, e.g. for the recirculation
pump (left, 1st symbol) or for DHW tank filling pump / solar pump
(right, 2nd symbol).

USER NOTE

The pump symbol lights up continuously if the DHW tank filling pump is running.
If the solar pump and DHW tank filling pump are running, then the solar pump
symbol flashes.

Safety instructions

All available relays can be manually activated and deactivated in the relay test.
With the solar pump it should be noted that a safety override may prevent
activation if there is a risk of damage to the system (collector, DHW tank).
Specifically this means that it will not be switched on if:
z the solar module is defective
z a defective collector (FSK) or DHW heating sensor (FB) was detected
z the collector temperature has reached the maximum permitted temperature
z the tank temperature has reached the maximum permitted temperature

Press "ENTER" to return to the next higher level.

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 Performing an LCD test 14

14 Performing an LCD test

The LCD test is used to check whether all the figures and symbols are displayed
in full.

Carrying out an LCD test

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "LCD TEST" is shown.

LCD TEST

Hold down "Display" and turn the dial. All the numbers and symbols must appear
+
on the display.

°F°C
1 2
Release the "Display" key.

1234567

Press "ENTER" to return to the next higher level.

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 15 Time, correcting the accuracy

15 Time, correcting the accuracy

Here you can set the time accurately to the second.

The factory setting is "0" seconds/day.

Define the deviation in seconds/day.

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "TIME" is shown.

TIME
0
Hold down "Display" and turn the dial until the identified deviation appears in the
+
display, e.g.: if it is 10 s/day fast, then set to -10 s/day.

TIME Release "ENTER" to store your input.

-10
Press the "Display" key to return to the next higher level.

Input range Factory setting

Time -30 seconds/day – +30 seconds/day 0

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 Reset 16

16 Reset

"RESET" is used to return all the controls settings to their factory settings. Any
previously programmed heating times as well as burner and solar hours remain
unchanged, however.

Reset steps

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "RESET" and 7 eights are displayed.

RESET
8888 888
Hold down the "Display" key until all the numbers in the display have
disappeared.

Release the "Display" key.

The preset factory settings are now restored.
RESET The numbers appear in the display once more.

No "RESET" is carried out if you release the "Display" key before all the numbers
have disappeared.

Press "ENTER" to return to the next higher level.

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 17 Version number

17 Version number

The version number is an encoded number that represents the production

release of the controls.

The version number must be specified in the event of troubleshooting or

questions about upgrades to the controls.

Displaying the version number

Press the "Display" key and "Install" key at the same time to call up the service
+ level. "AMERICAN" appears as the first main menu.

Turn the dial until "VERSION" and the version number

(in this case "3.24") are displayed.

VERSION
3.24

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 Sensor curves 18

18 Sensor curves

Always take the comparative temperature measurement

RISK OF LIFE (room, supply, external and flue gas temperatures) in
the vicinity of the sensor.
from electric shock.
The curves depict mean values and are subject to
WARNING! z Disconnect the system from the power tolerances.
supply before opening the cover of the
controls.

z Remove the plug for the sensor to be measured from

the controls (FB, FA, FK, FV, FG, FSK, FSS).

Measure the resistance at the connector terminals.

Outdoor temperature sensor (FA)

Resistance [k:]

5 (-15) 14 (-10) 23 (-5) 32 (0) 41 (5) 50 (10) 60 (15)

Outdoor temperature [°F (°C)]

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 18 Sensor curves

Boiler water (FK), supply (FV), DHW (FB) and solar water tank (FSS) temperature sensors
Resistance [k:]

68 (20) 86 (30) 104 (40) 122 (50) 140 (60) 158 (70) 176 (80) 194 (90)
Water temperature [°F (°C)]

Collector sensor (FSK)

Resistance [k:]

.
-58 (-50) 32 (0) 122 (50) 212 (100) 302 (150) 392 (200) 482 (250)
Collector temperature [°F (°C)]

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 Operating values at the service level/setup report 19

19 Operating values at the service level/setup report

Input range Factory setting Setting

Language American American

Building response -4 – 50°F (-20°C – 10°C) 41°F (5°C)

Type of construction 1, 2, 3 2

Burner system 1-stage/2-stage/modulating 1-stage

Modulating output 10 %–60 % 30 %

Operating time of the burner

5 s–60 s 12 s
actuator

Pump logic 59 – 140°F (15°C – 60°C) 104°F (40°C)

Maximum temperature 158 – 210°F (70°C – 99°C) 176°F (80°C)

Heating circuit 01 None/PERIM HTG PERIM HTG

Heating circuit 02 None/PERIM HTG/FLOOR HTG FLOOR HTG

Reference temperature (PERIM HTG

86 – 194°F (30 °C – 90°C) 167°F (75°C)
1 or 2)

Reference temperature (FLOOR

86 – 140°F (30°C – 60°C) 113°F (45°C)
HTG 2 only)

Remote control for heating circuit 1 OFF/ON OFF

Remote control for heating circuit 2 OFF/ON OFF

Offset circuit 1 OFF/2 – 18°F (1 – 10°C) 6°F (3°C)

Offset circuit 2 OFF/2 – 18°F (1 – 10°C) 6°F (3°C)

Outdoor setback
Room setback
Setback type for heating circuit 1 Outdoor setback
Setback
Switch-off

Outdoor setback
Room setback
Setback type for heating circuit 2 Outdoor setback
Setback
Switch-off

Further information on this can be found on the next page.

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 19 Operating values at the service level/setup report

Input range Factory setting Setting

Offset for heating circuit 1 -9 – +9°F (-5°C – +5°C) 0°F (0°C)

Offset for heating circuit 2 -9 – +9°F (-5°C – +5°C) 0°F (0°C)

DHW priority ON/OFF ON

Maximum heating circuit

PERIM HTG
temperature for heating circuit 2 68 – 140°F (20°C – 60°C)
194°F (90°C)
(PERIM HTG)

Maximum heating circuit

FLOOR HTG
temperature for heating circuit 2 68 – 194°F (20°C – 90°C)
113°F (45°C)
(FLOOR HTG)

Solar function ON/OFF ON

MAX-SL SR 140 – 194°F (60°C – 90°C) 167°F (75°C)

MIN-SL SR 86 – 130°F (30°C – 54°C)/OFF OFF

DHW PROD ON/OFF ON

DHW recirculation pump OFF/1/2/3/4/5/6/ON 2

Time -30 seconds/day – +30 seconds/day 0 seconds/day

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 Troubleshooting 20

20 Troubleshooting

Only one error is displayed at a time, so the following

table indicates the priority of each error.

Effects on control
Fault Possible cause of the fault Remedy
characteristics

Eliminate the burner fault as

Burner fault Boiler not working
Burner control described in the boiler or
BURNER ERROR Central heating stays cold
burner documentation.

The boiler is enabled with

Sensor defective. Check the sensor
Boiler sensor error maximum output (emergency
Connecting cable connection.
BLR SENSOR ERROR mode via thermostat is
interrupted Replace the sensor
possible).

Sensor defective. The minimum outdoor Check the sensor

Outdoor sensor error
Connecting cable temperature is expected connection.
OA SENSOR ERROR
interrupted (outdoor temp.: 14°F (-10°C)) Replace the sensor

Sensor defective. DHW tank no longer being Check the sensor

DHW sensor error
Connecting cable topped up connection.
DHW SENSOR ERROR
interrupted Solar pump is switched off Replace the sensor

Sensor defective.
Check the sensor
Connecting cable
Collector sensor error connection.
interrupted Solar pump is switched off
SL SENSOR ERROR Replace the sensor
Solar module (FM 244)
Replace the module
defective

Sensor defective.
Check the sensor
Connecting cable
Solar hot water sensor error connection.
interrupted Solar pump is switched off
DHW-SL ERROR Replace the sensor
Solar module (FM 244)
Replace the module
defective

Boiler water thermostat set

Set boiler water thermostat to
too low.
"AUT"
Heating error Manual reset high limit (STB) No boiler protection
Manual reset high limit (STB)
HEATING ERROR tripped Boiler stays cold
Check the fuel
No fuel
Check the sensor position
Sensor not arranged correctly

Constant attempts are made

Sensor not mounted correctly
DHW error to top up the DHW, but with a Check sensor and pump
Filling pump is connected
DHW PROD ERROR reduced boiler supply setpoint Manual mode
incorrectly or defective.
temperature.

Remote control has wrong There is no current room

address temperature measurement,
Check the address
Remote control 1 error Incorrect wiring so the ambient influence,
Check the wiring
REMOTE1 ERROR Remote control is defective switch-on and switch-off
Replace the remote control
Connecting cable optimization and automatic
interrupted adaptation do not apply.

Remote control has wrong

address There is no current room
Check the address
Remote control 2 error Incorrect wiring temperature measurement
Check the wiring
REMOTE2 ERROR Remote control is defective available, so the ambient
Replace the remote control
Connecting cable influence does not apply
interrupted

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 20 Troubleshooting

Effects on control
Fault Possible cause of the fault Remedy
characteristics

Supply temperature sensor Sensor defective. Check the sensor

The mixer is no longer being
2 error Connecting cable connection.
controlled.
MIX SENSOR ERROR interrupted Replace the sensor

FM 241 error Log the module off

Module no longer present Module is no longer being
(mixing card) Plug the module in again
Module defective addressed
FM 241 ERROR Replace the module

FM 242 error Log the module off

Module no longer present Module is no longer being
(burner card) Plug the module in again
Module defective addressed
FM 242 ERROR Replace the module

FM 244 error Log the module off

Module no longer present Module is no longer being
(solar card) Plug the module in again
Module defective addressed
FM 244 ERROR Replace the module

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 Troubleshooting 20

20.1 Troubleshooting "NO HEAT" call

“BRENNER” (burner) wiring block Example: Outdoor temperature at 32°F, based on

heating curve the water temperature required is 140°F
– Terminal 4 – 120V Neutral
with a 26°F burner differential.
– Terminal 8 – 120V input clocks hours run meter
The differential (26°F) is split (13°F) above & (13°F)
(must be field wired)
below the target temperature.
– Terminal 9 – 120V input displays “BURNER ERR”
140°F target + 13°F = 153° high limit
message (must be field wired)
140°F target - 13°F = 127° low limit
– Terminal 10 / 11 – “dry” contacts close to energize
burner This 127°F to 153°F becomes the range of temperature
that the boiler will maintain. As zones call and pull heat
– Terminal 12 – 120V power (drops out when manual
from the boiler, eventually the temperature in the boiler
reset limit is tripped)
drops. Once the temperature in the boiler hits the low
limit (127°F) the R2107 control closes a switch (dry
Burner operation
contacts) between terminals 10 & 11 to fire the boiler
The R2107 is not a cold start control. It does not reply on (this is indicated by a flame symbol displayed on
a call for heat from an end switch or thermostat to fire the the LDC screen of the R2107). When the boiler
boiler. temperature reaches the high limit (153°F), the contacts
open and the boiler stops firing.
The boiler will maintain a range of water temperature
based on outdoor temperature. The differential of this Once the outdoor temperature drops below the WWSD
range is dynamic, setting, the boiler begins to maintain temperature.
Above WWSD the boiler will only fire on a call for DHW.
meaning that it is not fixed, and will adjust based on
outdoor temperature and current system load. The
starting point of the differential

is 27°F (15°C) and will adjust from there. The differential

will generally be wider at milder outdoor temperatures
and narrower at

colder outdoor temperatures. The differential is split

above & below the current target temperature.

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 20 Troubleshooting

Oil burners – factory jumper between terminals 12 & 10, Gas burners – remove factory installed jumper between
brings 120V from 12 to 10. When contacts close terminals 10 & 12. The contacts between terminals 10 &
between terminals 10 & 11, 120V power is sent from 11 are now “dry” (no voltage present) and switching to
terminal 11 to Hot on the burner (terminal 4 is the the burner is now low voltage between terminals 10 & 11
neutral). on the R2107 and TT (or RW) on the boiler aquastat.

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 Troubleshooting 20

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 20 Troubleshooting

20.2 Troubleshooting „INSUFFICENT

HEAT“ call

A call for insufficient heat is generally a simple matter of

adjusting the heating curve.

The water temperature required for any heating system

is determined by any number of factors but the biggest
influence we see is the amount of radiation in
comparison to the actual heat loss. Buildings with less
radiation in relation to there actual heat loss require
higher water temperature than buildings that are over-
radiated. Every house is unique in terms of it’s heat
requirements. Some of the many factors include,
construction, exposure to sun, elevation, surroundings
(trees, other structures, etc), furnishings, internal heat
gain (computers, lights, people, appliances, etc) and the
expectations and comfort level of the individual.

The heating curve on a R2107 can be adjusted in

several ways:

REF TEMP – the reference temperature adjusts the

slope of the heating curve. The REF temperature in the
R2107 references a boiler water temperature at 14°F
outdoor temperature. In general, if the homeowner
complains that they can never get the house up to
temperature, adjust the REF temperature up. A rule of
thumb would be: for every 1 degree you want to raise the
room temperature, increase the REF temp by 2.5
degrees.

For example: Customer says they can’t get the house

above 65°F. We need to increase the room temperature
by 5°F…5 x 2.5 = 12.5.

You would increase the REF temperature by 12 or 13

degrees. The default setting in the R2107 is 167° REF
temperature.

OFFSET – the OFFSET setting is used to raise the

starting water temperature of the system. Another way
to say this is, raising the OFFSET setting will give you
higher water temperature at milder outdoor
temperatures. Common applications for adjusting the
OFFSET setting include, hydro-air, fan coils, unit
heaters, etc. These types of heating units typically
require some amount of minimum water temperature.
Occasionally, you may have a call for insufficient heat
but only in milder weather. Even with fin-tube radiation,
cast-iron radiators or panel radiators. With this type of a
call, you will want to increase the OFFSET setting.

USE THE QUICK REFERNECE GUIDE FOR INITIAL

PROGRAMMING

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 Troubleshooting 20

20.3 Troubleshooting Domestic Hot Water

TROUBLESHOOTING A “NO DHW” CALL:

A “DHW PROD ERR” message will appear on the LCD screen of the R2107 control with regard to domestic hot water
production.

DHW ERR - when the tank temperature drops to the low limit (9°F below the set point), the R2107 goes into DHW
priority mode.

During DHW priority, the R2107 raises the boiler water temperature to it’s high limit, interrupts power to the space
heating circuit {terminals 61(N) & 63 (H)} and energizes the DHW pump circuit {terminals 24 (N) & 25 (H)}. The pump
circuit symbol is displayed on the LCD screen.

In DHW priority, if the R2107 does not sense a rise in DHW temperature in 30 minutes, it will display a DHW PROD
ERR message.

At this point, the control will go back to space heating mode and lock out the DHW to avoid freezing the building. This
message is general in nature and the R2107 control is essentially telling you, “I tried to make domestic hot water but
nothing happened”.

IN MOST CASES THE PROBLEM IS NOT WITH THE R2107 CONTROL. To rule out the R2107, turn power off to the
R2107 to reset.

The R2107 will again try to make DHW. Check terminals 24 & 25 for 120V. If power is present and boiler fires the R2107
is o.k.

Check the following:

1 - bad circulator

2 - stuck flow check

3 - piping is air bound

4 - closed valve

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 21 Index

21 Index

B
Boiler water temperature sensor . . . . . . . . . . 58
Burner system . . . . . . . . . . . . . . . . . . . 24
C
Collector sensor . . . . . . . . . . . . . . . . . . 58
Controls on the 2107 . . . . . . . . . . . . . . . . 12
D
Design temperature . . . . . . . . . . . . . . . . 33
DHW priority . . . . . . . . . . . . . . . . . . . . 35
DHW recirculation pump . . . . . . . . . . . . . . 48
E
Emergency shutoff switch – heating system . . . . 6
F
Frost protection . . . . . . . . . . . . . . . . . . . 6
H
Heat storage capacity . . . . . . . . . . . . . . . 22
Heating circuit temperature . . . . . . . . . . . . . 36
Heating curve . . . . . . . . . . . . . . . . . . . . 50
Heating system . . . . . . . . . . . . . . . . . . . 30
L
Language selection . . . . . . . . . . . . . . . . . 29
LCD test . . . . . . . . . . . . . . . . . . . . . . 53
M
Manual reset high limit (STB) . . . . . . . . . . . . 17
Maximum room temperature hook-up . . . . . . . 39
Menu . . . . . . . . . . . . . . . . . . . . . . . . 18
Modulating output . . . . . . . . . . . . . . . . . 25
O
OFF temperature . . . . . . . . . . . . . . . . . . 28
ON temperature . . . . . . . . . . . . . . . . . . 27
Operating time of the burner actuator . . . . . . . 26
Outdoor temperature sensor . . . . . . . . . . . . 57
P
Password . . . . . . . . . . . . . . . . . . . . . . 17
Pump kick . . . . . . . . . . . . . . . . . . . . . 20
Pump logic . . . . . . . . . . . . . . . . . . . . . 27
R
Relay test . . . . . . . . . . . . . . . . . . . . . . 51
Remote control . . . . . . . . . . . . . . . . . . . 37
Reset . . . . . . . . . . . . . . . . . . . . . . . . 55
Room temperature offset . . . . . . . . . . . . . . 43
S
Safety instructions . . . . . . . . . . . . . . . . . 5
Sensor curves . . . . . . . . . . . . . . . . . . . 57
Service level . . . . . . . . . . . . . . . . . . . . 17
Setting parameters . . . . . . . . . . . . . . . . . 19
Setup report . . . . . . . . . . . . . . . . . .59, 61
Solar function . . . . . . . . . . . . . . . . . . . . 44
System frost protection, frost protection . . . . . . 21
T
Type of construction . . . . . . . . . . . . . . . . 22
Type of setback . . . . . . . . . . . . . . . . . . . 41
V
Version number . . . . . . . . . . . . . . . . . . . 56

68 Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.
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 Notes

Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 69
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70 Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.
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Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 71
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 United States and Canada

Bosch Thermotechnology Corporation

50 Wentworth Avenue
Londonderry, NH 03053
U.S.A.
Tel. 603-552-1100
Fax 603-584-1681
www.buderus.net

Products manufactured by
Bosch Thermotechnik GmbH
D-35573 Wetzlar
www.buderus.de

Bosch Thermotechnology Corporation reserves the

right to make changes without notice due to continuing
engineering and technological advances.

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