36
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 a 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 lines to the heat
pump (
7
≥ DN80).
!
Please note
To prevent damage to the
appliance, connect the pri-
mary lines to the heat pump
free of load and torque
stresses.
The primary lines must not
exert any pressure on the
heat pump casing.
!
Please note
Ensure the hydraulic connec-
tions on the primary side are
tight in order to prevent the
formation of condensate
inside the heat pump.
■ With line entries, ensure the
diaphragm grommets on
the l.h. side panel are
seated correctly.
■ Make line entries air-tight.
4.
Insulate primary lines inside the
building to provide protection from
heat and vapour diffusion.
5.
Charge the primary circuit with
Viessmann heat transfer medium
and vent.
Installation sequence
Hydraulically connecting the primary/secondary…
(cont.)
5848 246 GB
