8.4
Checking safety valves
The safety valves for the installation (placed outside the heat pump unit) should be checked at least four times
per year to prevent lime deposits clogging 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 normal for the safety valve to let out small amounts of water when the water tank is being charged,
especially if a lot of hot water was used previously.
The safety valves can normally 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.
Note that it may be normal that small amounts of water may exit from the hot water tank safety valve when the
hot water is heated up. This is because that water expands when heated and needs to be released to avoid
damage on the hot water tank.
Make sure to never ever block the connection to the safety valves' overflow pipes. Any excessive pres-
sure must always be able to escape.
8.5
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.
8.6
Cleaning the filters for the heating and brine circuits
Contact your installer if you are not sure how to perform the filter cleaning.
The cleaning of filters may cause air ingress to the brine or heating system that may cause operational distur-
bances. For cleaning magnetite filters, please refer to the filter manufacturers instructions.
Heating circuit:
Check and clean the filters at least twice the first year after installation. The interval can be extended if there is
evidence that cleaning twice a year is not necessary.
Have a cloth at hand when opening the filter cover as a small amount of water usually escapes.
User Guide
Thermia Legend
Thermia AB
BWLE01UG0102
21
