Maintenance of VVM 310
Regular checks
Your indoor module is, in principle, maintenance free and therefore re-
quires minimal care after commissioning. On the other hand, it is recom-
mended that you check your installation regularly.
If something unusual occurs, messages about the malfunction appear in
the display in the form of different alarm texts. See alarm management
on page 56.
Safety valve
The hot water coil's externally mounted safety valve sometimes releases
a little water after hot water usage. This is because the cold water, which
enters the hot water coil, expands when heated causing the pressure to
rise and the safety valve to open.
The function of the safety valve must be checked regularly. You can find
the safety valve on the incoming pipe (cold water) to the hot water coil
Perform checks as follows:
1.
Open the valve.
2.
Check that water flows through the valve.
3.
Close the valve.
TIP
The safety valve is not supplied with the indoor module. Contact your in-
staller if you are unsure how one checks the valve.
21NIBE™ VVM 310Chapter 2 | The heating installation – the heart of the house
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