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e) Take the whole motor module including fans out of the
ventilation unit. To do so, use the handle on the motor module.
f)
Remove the yellow cable bracket from the EPP housing, and
carefully remove the cable from the cable channel.
32
g) Now, carefully pull the bypass valve out of the EPP housing.
There are two finger-holes in the valve for this purpose.
h) First clean the bypass valve using a vacuum cleaner to remove
most of the debris. Then you can clean it with a soft brush or a
duster.
i)
Check whether the valve can still turn freely by rotating the
valve part. If the valve cannot be moved, the whole bypass valve
must be replaced.
j)
Mount the bypass valve, motor module and ventilation unit in
reverse order, and put the ventilation unit back into service by
restoring power. If the unit is ceiling mounted, the wire brackets
should be refitted last (also see Ceiling mounting on page 20).
ä
Warning!
When refitting the bypass valve, make sure that it is pushed
right in until it is flush with the EPP housing. If the valve housing
is protruding, this may obstruct the fan and damage it.
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