Maintenance; Filter; Rotor; Electrical Motors - Dehutech 450 Technical Manual

Maintenance

NOTE ! With all maintenance and service of the
dehumidifier:
• Switch off the dehumidifier approximately
15 minutes prior to opening any service
panel, allowing the heater to cool down.
• Disconnect the dehumidifier from main
electrical supply by turning the external
switch to the off position or by pulling out
the power plug.
The maintenance intervals for the dehumidifier
depend on the surrounding environment and
installation site. Recommended maintenance
intervals could therefore differ from one instal-
lation to another. Incorrect maintenance and
service may result in reduced dehumidification
capacity.

Filter

The dehumidifier is equipped with two separate
filters, one for the process air and the other for
the reactivation air. The filters are positioned at
the respective inlets and will clean the air prior
to entering the dehumidifier.
Intervals for cleaning or replacement of the
filters will be determined by the amount of dust
and particles in the air at the installation site.
We recommend that the filter is checked at least
once a month, at least for the first year of a new
installation.
Never operate the dehumidifier without the fil-
ters, as the rotor can be damaged by dust.

Rotor

The rotor is maintenance free. However should
it be necessary to clean the rotor careful use of
compressed air should be the first choice. With
severe contamination the rotor can be washed
with water.
Cleaning with water is no routine matter, please
contact DehuTech AB or a local distributor prior
to this procedure.
Check the rotor bearing and the rotor surface
once a year.
Subject to change without notice

Electrical motors

The electrical motors are equipped with ball
bearings. The bearings are designed to last the
life of the motor and therefore no maintenance is
required.
Check the motors once a year for any abnormal
sound.

Heater

The reactivation electric heater does not need
maintenance, but should be checked twice a year
for any dust or mechanical damage to the heat-
ing rods. Clean with a soft brush, or vacuum
clean with dust. Gentle use of compressed air is
another alternative.

Rotor drive belt

Check the belt tensioning at regular intervals.
Adjust when needed by moving the tensioning
support wheel closer to the desiccant rotor.
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DehuTech 450