10
MAINTENANCE
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ATTENTION
• Maintenance should only be carried out by qualified personnel
• Unit should be disconnected from mains before removing covers
• If unit has just been running, the heater bank may still be hot
DESICCANT ROTOR
The desiccant rotor is maintenance free, however, if it becomes blocked with dust (e.g. if it has been running
without inlet air filter) it can be cleaned by vacuum cleaner or low pressure compressed air.
HEATER BANK
The PTC heater bank is maintenance free however, if it becomes blocked with dust (e.g. if it has been running
without inlet air filter) it can be cleaned by vacuum cleaner or low pressure compressed air.
OVER-HEAT PROTECTOR
In the event of total airflow loss, the over-heat protector will operate. If this happens
it will need to be manually re-set after the airflow is restored.
To reset, push the red button (R) down.
DESICCANT ROTOR DRIVE
The desiccant rotor is driven by a geared motor via a toothed belt. The rotation
speed is approximately 20 revolutions per hour. It can be seen turning during
operation through the air outlet duct. If it appears to be slow or sticking, the belt can
be re-tensioned using the 4 mounting screws at ‘‘A’’.
NOTE: Do NOT over-tension
the belt. After tensioning it
should have movement as
shown in the image.
