Buderus Logamatic 2107 Quick guide

Installation and Service
Instructions
160
AUT
180
140
120
AUTOMATIC
11.15am 71°F
Boiler Controls
Logamatic 2107
6 720 618 142 - 08/2008 US/CA
For the installing contractor
Please read carefully prior
to commissioning or
servicing.

Production
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.2
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.
This product has been tested and is
certified for both the US and Canadian
markets and meets all applicable US and
Canadian standards.

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

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

Safety instructions and user notes 1
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 5
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.
WARNING!
PRIORITY SAFETY INSTRUCTIONS
The term "Warning" refers to dangers,
which may lead to injury or death.
WARNING!
HAZARD - ELECTRICAL POWER
This symbol indicates a danger through
electrical power.
CAUTION!
SAFETY INSTRUCTION – 2ND
PRIORITY
The term "Caution" refers to dangers,
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.

Safety instructions and user notes
1
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.6
1.3 Please observe these safety
instructions
The Logamatic 2107 controls has been designed and
built in accordance with currently recognized standards
and safety requirements.
However, property damage resulting from inappropriate
handling of this device cannot be completely excluded.
–Only operate the Logamatic 2107 controls for the
intended purpose and when it is in perfect working
order.
–Carefully read these service instructions before
starting any work on the controls.
Note the following safety instructions while using the
Logamatic 2107 controls.
WARNING!
RISK OF LIFE
from electric shock.
zPrior to opening the controls, isolate
the system from the mains supply via
the boiler emergency shutoff switch or
the heating system circuit breaker.
zAll tasks listed in these service
instructions, which require the opening
of the control panel, must only be
carried out by trained personnel.
CAUTION!
SYSTEM DAMAGE
through frost.
zFrost 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.
WARNING!
RISK TO LIFE
zIn an emergency, switch OFF the
emergency shutoff switch outside the
boiler room.
CAUTION!
SYSTEM DAMAGE
through inappropriate work on the
system.
zOnly enter or change the operating
values in accordance with the details
shown in these instructions.
Other inputs alter the control program
of the heating system and can lead to
incorrect system functions.

Setting parameters and display data for the Logamatic 2107 2
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 7
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
2-STAGE1Burner type1
MIN MOD2Minimum modulation output2
TIME RUN2Minimum 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 T3Room temperature hook-up3
OA SETBACK Type of setback
OFFSET Room temperature offset
CIRCUIT 025Heating circuit 2 installation parameters (mixed heating circuit)4
UND-FLOOR Heating system
REF TEMP Design temperature
DHW PR5DHW priority5
MAX TEMP Maximum heating circuit temperature
REMOTE 2 Remote control ON/OFF
DIFF T3Room temperature hook-up3
OA SETBACK Type of setback
OFFSET Room temperature offset

Setting parameters and display data for the Logamatic 2107
2
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.8
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 PUMP5DHW circulation pump5
HTG CURVE 1 Heating characteristic curve HK1
HTG CURVE 24Heating characteristic curve HK24
RELAYS Relay test
BURNER (St.1) Burner relay stage 1
BURNER21, MOD22Burner relay1stage 2, modulation output2
HTG1 PUMP Heating circuit pump (HZ1 unmixed)
HTG2 PUMP4Heating circuit pump (HZ2 mixed)4
MIX VALVE4Mixer4
DHW PUMP Tank DHW pump
RECIR PUMP DHW circulation pump
SLR PUMP7Solar pump7
LCD TEST LCD test
TIME Time, accuracy
RESET Reset
VERSION Version number
Display
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.

Installation 3
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 9
3 Installation
3.1 Mounting of the Logamatic
zOn the GC124, G124X, GA124, G234X, G244, and G334X boilers remove
the front panel of the boiler.
zRemove rear top panel of the boiler by first unscrewing 2 screws at the rear
edge, then sliding rear panel backward to disengage the hooks.
zRemove the two screws at the top of the Logamatic, and lift up top cover.
zInsert 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.
zFasten the control to the boiler jacket using the two screws as shown.
zThe 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.
zG115, G125, GB125, G215, G315: Replace brass well with chrome
Logamatic well. The sensor bundle must be fully inserted into the Logamatic
well.
zGC124, 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.
zG234: 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.

Installation
3
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.10
zElectrical connections must be made according to the wiring diagrams.
zAll 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.
zUse the white strain relief brackets provided to lock all cables into place on
the back of the control.
zTilt the display to the desired position.
zReplace the top housing of the controls and fasten the two screws. The
control is ready to be placed into operation.

Installation 3
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 11
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
4
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.12
4 Logamatic 2107 controls
Introduction to the user interface of the Logamatic 2107 controls.
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
160
AUT
180
140
120
160
AUT
180
140
120
1
2
3
4
5
7
6
98
10
AUTOMATIC
11.15am 71

Logamatic 2107 controls 4
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 13
Keys for basic functions
You can control the basic functions using this keypad.
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)
1234

Logamatic 2107 controls
4
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.14
Keys for extended functions
This keypad is located behind the flap.
This keypad is used, for example, to enter the day, set the time, select
temperature values, etc.
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
26
9
10
11
45
13
7
8

Checking the manual reset high limit (STB) 5
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 15
5 Checking the manual reset high limit (STB)
zRemove the dial on the boiler water thermostat (Fig. 4).
USER NOTE
Check the STB after the initial installation, and after every service.
+
zSwitch on the system.
zPress 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.
Hold down the "Display" key and turn the dial, until "BURNER ON" appears in
the display.
The burner starts running.
Release the "Display" key.
RELAY
ON
BURNER °F
Fig. 4 Remove the dial on the
boiler aquastat.
160
AUT
180
140
120

Checking the manual reset high limit (STB)
5
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.16
zPush 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
(Fig. 5).
Terminating or exiting the test
zTo reset the manual reset high limit, remove the cover on the STB and press
the reset button located beneath it (Fig. 6).
Fig. 5 Triggering the manual reset
high limit
Item 1: Key
Item 2: Lever
1
2
Press "AUT".
Reattach the dial and turn it to the "AUT" position.
Fig. 6 Remove the STB cover.
Item 1: STB cover.
AUT
90
70
60
50
I0
1...7
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Install Zurück
ROG
1

Using the service level 6
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 17
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.
6.1 Calling up the service level
CAUTION!
SYSTEM DAMAGE
through inappropriate work on the system.
zOnly 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.
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
the first main menu.
The service level is now activated.
AMERICAN
USER NOTE
The unit automatically returns to the standard display if no settings are made
within 5 minutes.

Using the service level
6
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.18
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.
AMERICAN
You can scroll through the main menu level by turning the dial.
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.

Using the service level 6
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 19
6.3 Modifying settings
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
The unit automatically returns to the standard display if no key is pressed within
5 minutes.
+
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.
Press "ENTER".

General data
7
Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications.20
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.