Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 43 / 160

General information
For some steps, the technical service
level of the control unit must be
enabled (see page 76). Observe the operating instruc-
tions during the commissioning
of the heat pump.
Checking the refrigerant circuit for leaks
1. Remove the front panel:
& Open locking mechanism
A
,
& Pull the front panel from the top
down and
& lift the front panel out of the bot-
tom.
2. Check the floor area, valves and all
visible solder joints for traces of oil.
Fill the system and check for leaks
1. Open any fitted non-return valves.
2. Check the inlet pressure of the dia-
phragm expansion vessel.
3. Thoroughly flush the heating sys-
tem.
4. Fill the heating system with water
and check it for leaks.
Operating pressure: 2 bar
Max. operating pressure: 4 bar
5. Reset the non-return valves into
their operation position.
Checking the diaphragm expansion vessel and the pressure
in the heating circuit
Carry out this test on a cold system.
Further details regarding the individual steps
43
Commissioning, inspection, maintenance
55
92
901
GB
Service