Checking The Safety Valve; In The Event Of Leakage; Cleaning The Strainer For The Heating System - Danfoss DHP-H User Manual

6 .4

Checking the safety valve

Both the safety valves for the heating system must be checked at least four times a year to
prevent lime deposits clogging the mechanism. See the "Installation principle" section for
information on where the safety valves are located.
The safety valve of the water tank protects the enclosed heater against over pressure in the
water tank. It is mounted on the cold water inlet line, its outlet opening facing downwards.
If the safety valve is not checked regularly, the water tank might be damaged. It is quite
normal that the safety valve lets out small amounts of water when the water tank is being
charged, especially if a lot of hot water was used previously.
Both safety valves can be checked by turning the cap a quarter of a turn clockwise until the
valve lets out some water through the overflow pipe. If a safety valve does not work properly,
it must be replaced. Contact an authorized installer, see the "References" section.
The opening pressure of the safety valves is not adjustable.
6 .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 an authorized installer,
see the "References" section.
6 .6

Cleaning the strainer for the heating system

⚠
The heat pump must be switched off at the main switch before cleaning can be started.
The brine circuit's strainer 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.
Shut-off valve
NOTE! Have a cloth to hand when opening the strainer cover as a small amount of water usually
escapes.
To clean the strainer:
1 Switch off the heat pump.
2 Turn the shut-off valve to the closed position (see figure above).
 Unscrew the cover and remove it.
 Remove the strainer.
Figure 20: shut-off valve and strainer on the return pipe .
VUBMA102
Strainer
O-ring
Cover
Danfoss –