393870-2 Rev 0: 11.07.2018 BBV
We reserve the right to change technical data without notice.
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Page 6
Maintenance and cleaning of rotary heat exchanger
This must be done by a qualified person.
If the unit is placed high under a ceiling, then it might be an advantage to get help from another
person to hold the rotor exchanger in correct position till all four “safety” screws are loosen.
Disconnect the 3-poled plug , and then unscrew those four “safety” screws that holding the rotor
exchanger in place.
(Sketch shows AHU-300 HH, but the
princip is the same for AHU-300 HV)
Can be pulled out of the ventilation
unit without the need for any tools.
Rotor exchanger can easily be removed for
cleaning by unscrewing 12 screws that hold it
together.
Clean parts with mild soap and water.
Do not expose the rotor motor or
connector for moisture.
The exchanger you also can clean
with mild soap and water. Do not use ammonia-
containing detergent, as this will prey on and
discolor aluminum in rotary heat exchanger.
Flushed with hand shower and blow gently clean
with compressed air.
Ensure that all 12 screws are tightened sufficiently so that they do not come loose
during operation.
Preferably use a screwdriver to tight the screws. If use of electrical screwdriver, make
sure that you use low torque to prevent destroying the threads in the sheet metal parts.
To make sure that the drive belt can adjust itself into correct position you must rotate the exchanger
some few turns. Then insert back into the ventilation unit. Be sure that rotor exchanger is properly
inserted in all the guides inside the unit. If not, this can lead to vibration in the system and internal
air leak in the unit. Make sure that all four “safety” screws are tightened so that there is no danger
that they loosen during operation.