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System schemes
6 720 645 817 (2010/09)
16
1.7 System scheme 7: one unmixed heating circuit, three mixed heating circuits, low loss
header
Hydraulic scheme with controller (schematic diagram)
Fig. 7
AF Outside temperature sensor
CUx Boiler control unit
FB 100 Remote control
FW 200 Weather-compensated controller
HP Heating circuit pump (primary circuit)
IPM 2 Load switching module for two heating circuits
M
2,4
3-way mixer
MF
2,4
Mixer circuit temperature sensor
P
1,4
Heating circuit pump (secondary circuit)
TB Temperature limiter
VF Common flow temperature sensor
1 Module position: on the heat source
3 Module position: on the wall
Heating system components
Suprapur gas condensing boiler for balanced flue
operation, without diaphragm expansion vessel
One unmixed heating circuit
Three mixed heating circuits
Weather-compensated controller
Features
Generally, we would recommend the installation of a
low loss header on site to ensure reliable transfer of
the required heating output.
The FW ... weather-compensated controller is
preferred for its higher utilisation of condensing
technology.
Determine the system water content and select a
corresponding expansion vessel (Æ page 39).
Install a mechanical safety limiter (TB 1) in
accordance with the underfloor heating system
manufacturer's instructions.
Function description
The heating circuits are regulated by an FW 200
weather-compensated controller. This always requires
two IPM 2 load switching modules. A 2-wire BUS system
enables communication between the boiler control unit,
the controller and the load switching modules.
6 720 643 417-08.1O
IPM 2 IPM 2
AF
FB 100 FB 100
1
CUx
FW 200
333
3
3
VF
T
T
P1
T
T
M
M2
P2
MF2
TB
T
T
M
M3
P3
MF3
TB
T
T
M
M4
P4
MF4
TB
Suprapur
KBR 120-280
HP
16


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