Viessmann BWT 241.A Series, Installation And Service Instructions Manual

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Connecting the primary circuit
!
Please note
The components used must be
resistant to the heat transfer
medium.
Never use zinc-plated pipes.
1. Equip the primary circuit with an
expansion vessel and safety valve (in
accordance with DIN 4757).
Note
■ Expansion vessel must be
approved to DIN 4807. Dia-
phragms of expansion vessel and
safety valve must be suitable for
the heat transfer medium.
■ Discharge and drain pipes must
terminate in one container that can
hold the maximum possible expan-
sion volume of the heat transfer
medium.
2. Ensure adequate thermal and sound
insulation of all pipes routed through
walls.
3. Connect primary pipes to heat
pump.
4. Insulate pipes inside the building to
provide protection from heat and
vapour diffusion.
Connecting the secondary circuit
F E
D C
Safety assembly supplied
C
Pressure gauge
D Connection G1
E Quick-action air vent valve
F Safety valve
1. Equip the secondary circuit on site
with an expansion vessel and the
safety assembly supplied (in accord-
ance with DIN 4757).
Fit the safety assembly to the on-site
pipe in the heating water return
or
to the primary circuit/secondary cir-
cuit connection set (accessories).
Connection set installation
instructions
2. Connect secondary pipes to the heat
pump.
Installation sequence
Hydraulic connections
(cont.)
5601 598 GB