Maintenance of VVM 500
Regular checks
Your indoor module is, in principle, maintenance free and therefore requires
minimal care after commissioning. On the other hand, it is recommended
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
57.
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 installer
if you are unsure how one checks the valve.
NIBE™ VVM 500Chapter 2 | The heating installation – the heart of the house20
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