Maintenance of VVM 320
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.
All servicing must be carried out by a person competent for the job.
If something unusual occurs, messages about the malfunction appear
in the display in the form of different alarm texts. See alarm management
on page 77.
Safety valve
The water heater's 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.
1.
Open the valve.
2.
Check that water flows through the valve.
3.
Close the valve.
4.
Check the system pressure, top up if required.
NOTE
Do not remove or adjust any components that are part of this
pressurised water heater. Contact your installer!
NOTE
If this pressurised water heater develops a fault, e.g. a flow of
hot water from the overflow pipe, turn the heat pump off and
contact your installer.
21Chapter 2 | The heating installation – the heart of the houseNIBE VVM 320
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