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Plumbing installation
Condensate drain
Important information
The unit comes with an Ø20 mm condensate drain (PVC, GF-fittings).
When the ventilation unit is in operation, negative pressure of up to 500 Pa can be created. This happens in the part where the
condensate drain is situated and corresponds to a 50 mm water column. The water trap should therefore be installed as shown to
prevent it from drying out and to stop a potential return flow of condensate water.
The connection of the water trap must be airtight. Otherwise air will be drawn into the ventilation unit and it will prevent condensate
water from draining away. It could cause water damage if the condensate tray were to overflow and condensate water were to leak
from the ventilation unit.
After you have installed the water trap, test its function in the following way (the unit must be connected to the duct system):
Fill the condensate tray with water, close the unit door and start the ventilation unit at the highest fan speed level. Allow it to run for
several minutes. Open the door and check that the water has drained from the condensate tray.
The water trap can dry out in the summer. Negative pressure in the chamber will then cause air to be drawn into the ventilation unit
and this will prevent condensate water from draining away. You should therefore check the water trap regularly and top up with water
when necessary, especially in the autumn.
Connection of water trap
It is important that the water trap complies with the measurements below. If the water trap is placed outside the climate screen, it
should be protected against frost.
ATTENTION
The condensate drain must
be fitted with a water trap to ensure that condensate water can drain away.
ATTENTION
If you install the ventilation unit outside the climate screen, it is important to protect the condensate drain against frost.
This is achieved by using a heating cable and proper insulation of the drain. Frost protection of the unit is the installer's
responsibility.
USEFUL INFORMATION
As an accessory, Nilan can supply a water trap with ball. When the water trap dries out, the ball closes it off and ensures
that air cannot be drawn into the ventilation unit. When condensate water is formed again, it will lift the ball, and the
water will be able to drain away without problems.
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Ø20 mm min. 50 mm
min. 50 mm
Ø20 mm min. 50 mm
min. 50 mm
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