Installer manual - nibe.com

24
6 Commissioning and adjusting
Preparations
1. Check that the switch (SF1) is in position " ".
2. Check that the drain valve is fully closed and that the
temperature limiter (FD1) has not deployed.
Caution
Check the temperature limiter (FD1) and miniature
circuit-breaker (FA1) in VVM 500. They
may have tripped during transportation.
Filling and venting
Filling the hot water coil
1. Open a hot water tap in the house.
2. Open the externally mounted shut-off valve. This
valve should then be fully open during operations.
3. When water comes out of the hot water tap, the hot
water coil is full and the tap can be closed.
Filling the climate system
1. Open the vent valves (QM20).
2. Open the externally mounted filler valve. The boiler
section and the rest of the climate system are filled
with water.
3. When the water that exits the vent valves (QM20)
is not mixed with air, close the vent valves. After a
while the pressure rises on the externally mounted
pressure gauge. When the pressure for the externally
mounted safety valve has been reached, it starts to
release water. Close the filler valve.
4. Open the externally mounted safety valve until the
boiler pressure falls to the normal working range
(approx. 1 bar) and check that there is not air in the
system by turning the vent valves (QM20).
Venting the climate system
1. Turn off the power supply to the indoor module.
2. Vent the indoor module via the vent valves (QM20)
and the rest of the climate system via the relevant
vent valves.
3. Keep topping up and venting until all air has been
removed and the pressure is correct.
Chapter 6 | Commissioning and adjusting
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VVM 500
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NIBE VVM 500