Main components
Replacement of immersion heater
1 Set the switch (SF2) to
"stand by" mode and wait
approx. 30 secs
2 Cut the power supply to
VVM 320 and EB 101.
3 Close the shut-off valves to
the heating system and EB
101
4 Drain the water by connect-
ing a hose to the lower filler
valve QM11 and open it, al-
low air to enter via the vent
QM 20.
5 Remove the plastic cover
above (AA1) using a screw-
driver.
59Chapter 7 | Component replacementNIBE™ VVM 320
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