Logamatic 4121 And 4122 Control Units - Buderus Logamax plus GB162 Technical Manual

4.7

Logamatic 4121 and 4122 control units

Logamatic 4121 control unit
The Logamatic 4121 control unit is part of the modular
Logamatic 4000 control system. In its standard version, it
includes the CM431 controller module, the MEC2
programming unit and the ZM424 central module.
• Logamatic 4121 (product no. 7 747 011 916)
The following components can be controlled:
• One gas condensing boiler with modulating burner
operation (in conjunction with the universal burner
control unit UBA3.5 or UBA1.5)
• One heating circuit with actuator
• Selection function (only one function can be selected)
– A second heating circuit without actuator and DHW
temperature control via a cylinder primary pump incl.
switching the DHW circulation pump via the
Logamatic 4000
or
– A second heating circuit with actuator and DHW
temperature control via EMS (with 3-way diverter
valve) or cylinder primary pump and DHW
circulation pump
1
Fig. 35 Logamatic 4121 control unit with standard
equipment level
1 ZM424 central module
2 CM431 controller 'module
3 MEC2 programming unit
4 Control unit ON/OFF switch
5 Fuse
6 720 645 821 (2010/09) – Logamax plus GB162
Logamatic 4122 control unit
In its standard version, the Logamatic 4122 control unit
includes only the CM431 controller module and the
MEC2 programming unit (
any functions of its own. The functionality of the control
unit is dictated by the various modules (
• Logamatic 4122 with MEC2
(product no. 7 747 011 918)
• Logamatic 4122 with display
(product no. 7 747 011 912)
Alternative applications are as follows:
• Logamatic 4122 combined with the function modules
FM441, FM442, FM443, FM444, FM445, FM446 and
FM448 to extend the control functions (up to 56
heating circuits)
• Logamatic 4122 combined with the FM456 KSE2 or
FM457 KSE4 function modules to regulate up to eight
gas condensing boilers in a cascade
2,3
4
5
Fig. 36 Logamatic 4122 control unit in standard form
6 720 641 280-16.1il
1
2
3
4
fig. 36). It does not contain
as a version with MEC2 programming unit; as
an option available with a display
CM431 controller 'module
MEC2 programming unit
Control unit ON/OFF switch
Fuse
Heating control 4
tab. 16).
1,2
3
4
6 720 641 280-17.1il
43