Replacement of shunt valve QN11
1 Set the switch (SF2) to
"stand by" mode and wait
approx. 30 secs
2 Turn off the power supply
to VVM 500 and EB 101.
Drain valve (QM1)
QM20
Reversing
valve (QN11)
3 Drain the water by open-
ing the drain valve (QM1)
and allow air in via the vent
(QM20) until VVM500 is
empty.
37Chapter 7 | Component replacementNIBE™ VVM 500
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