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System schemes
6 720 645 817 (2010/09)
8
1.3 System scheme 3: mixed heating circuit, DHW circuit, low loss header
Hydraulic scheme with controller (schematic diagram)
Fig. 3
AF Outside temperature sensor
CUx Boiler control unit
FW 100 Weather-compensated controller
HP Heating circuit pump (primary circuit)
IPM 2 Load switching module for two heating circuits
LP Cylinder primary pump
M 3-way mixer
MF Mixer circuit temperature sensor
P Heating circuit pump (secondary circuit)
SF Cylinder temperature sensor
ST DHW cylinder
TB Temperature limiter
VF Common flow temperature sensor
ZP DHW circulation pump
1 Module position: on the heat source
3 Module position: on the wall
Heating system components
Suprapur gas condensing boiler for balanced flue
operation
One mixed heating circuit
DHW cylinder
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.
Install safety assembly to DIN 1988.
Function description
The mixed heating circuit with low loss header and
DHW heating are regulated by an FW 100 weather-
compensated controller. This always requires the IPM 2
load switching module. A 2-wire BUS system enables
communication between the boiler control unit, the
controller and the load switching module.
6 720 643 417-03.1O
3
AF
3
CUx 2 MPI001 W
F
T
T
M
M
P
MF
TB
VF
LP
1
ZP
SF
ST ...
Suprapur
KBR 120-280
HP
8


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