Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 49

Hydraulically connecting the primary/secondary...
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 anti-
vibration insulation of all pipes routed
through walls.
3. Connect primary pipes to heat
pump.
!
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 onto 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.
Installation sequence
4. Insulate primary lines inside the
building with thermally insulating and
vapour diffusion-proof materials.
5. Fill the primary circuit with
Viessmann heat transfer medium
and vent.
(cont.)
49