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System schemes
6 720 645 817 (2010/09)
6
1.2 System scheme 2: unmixed underfloor heating circuit, low loss header
Hydraulic scheme with controller (schematic diagram)
Fig. 2
AF Outside temperature sensor
CUx Boiler control unit
FW 100 Weather-compensated controller
HP Heating circuit pump (primary circuit)
IPM 1 Load switching module for one heating circuit
P 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 underfloor heating circuit
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 unmixed underfloor heating circuit with low loss
header is regulated by one FW 100 weather-
compensated controller. This always requires the IPM 1
load switching module. A 2-wire BUS system enables
communication between the boiler control unit, the
controller and the load switching module.
The controller is suitable for wall mounting inside the
boiler room or in the living space. Installing it in the living
space enables room temperature hook-up.
1 MPI001 WF
3
AF
T
T
P
TB
CUx
1
VF
Suprapur
KBR 120-280
HP
3
6 720 643 417-01.1O
6


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