6.5
Checking safety valves
The safety valves for the installation must be checked at least four times a year to prevent lime deposits clog-
ging the mechanism.
The safety valve of the water tank protects the enclosed heater against over pressure. It is mounted on the cold
water inlet line. If the safety valve is not checked regularly, there is a risk that the water tank may sustain dam-
age. It is quite normal for the safety valve to let out small amounts of water when the water tank is being charg-
ed, especially if a lot of hot water was used previously.
The safety valves can be checked by turning the cap a quarter of a turn clockwise until water comes out of the
overflow pipe. If a safety valve does not work properly, it must be replaced. Contact your installer.
The opening pressure of the safety valves is not adjustable.
6.6
In the event of leakage
In the event of leakage in the hot water pipes between the heat pump and water taps, close the shut-off valve
on the cold water inlet immediately. Then contact your installer.
In the event of leakage in the brine circuit, turn off the heat pump and call your installer immediately.
6.7
Cleaning the filters for the heating and brine circuits
N
The heat pump must be switched off at the main switch before cleaning can
be started.
N
The filter must be cleaned twice a year after installation. The interval can be
extended if there is evidence that cleaning twice a year is not necessary.
N
Have a cloth to hand when opening the filter cover as a small amount of wa-
ter usually escapes.
A
D
C
B
A
B
C
D
1
Shut-off tap
2
Cover
3
Filter
4
O-ring
Clean the filter as follows:
User Guide
Domestic heat pumps
VUGFD202
Thermia Värmepumpar
20
