Plumbing installation
Condensate drain
Important information
The unit is supplied with an Ø20 mm condensate drain (PVC, GF-fittings). The condensate drain is
located on the side of the unit under the exhaust duct connection and is marked with a yellow label.
ATTENTION
There must be install a water trap in connection with the condensate drain to ensure that
condensate water can drain away.
ATTENTION
If you set up the unit outside the climate screen, it is important to use a heating cable to prevent
the condensate drain from icing up. Frost protection of the unit is the installer's responsibility.
ATTENTION
During operation negative pressure of up to 1000 Pa may occur in the drain, corresponding to a
100 mm water column. The water trap must therefore be fitted as illustrated to prevent it from
drying out and to avoid return flow.
The connection of the water trap must be air-tight; otherwise air will be drawn into the unit and
condensate water will remain in the unit. It could cause water damage if the condensate tray
overflows and condensate water runs out of the unit.
The water trap may dry out and thus prevent water escaping from the condensate tray, as air
will be sucked into the unit. The water trap should therefore be checked regularly, especially at
the end of the summer, and it should be filled with water if necessary. Increasing the height of
the water trap beyond the minimum requirements will minimise the need for refilling.
INFO
Nilan can supply a water trap with a ball. The ball ensures that no air blows into the unit through
the condensate drain if the water trap dries out. This ensures that water in the condensate tray
can drain off, which makes it unnecessary to check the condensate drain quite so often.
After installing the water trap, you should test it as follows (the unit must be connected to the duct
system and the door must be closed):
Fill the condensate tray with water and start the unit at the highest fan speed level. Allow it to run for
several minutes. When the test is complete, make sure there is no water in the condensation tray.
Connecting condensate drain
min. 170 mm
Connection of Nilan's water trap with ball at the bottom of the
unit / extract air / suction side.
VPM 120-560 (English) BY NILAN
29
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