1033770
We reserve the right to alter specifications
Air heater unit ATD (A, G)
GB
6
Preventive maintenance
The following should be checked regularly to prevent
operational failures:
• Abnormal sounds or vibrations – check motor bearing
and fan impeller.
• Fastening devices – check that all bolted joints are
undamaged.
• Electrical installation – check for any damage and that
the safety switch functions correctly.
• Fin structure – check that it is clean and undamaged.
• Fan impeller – check that it is clean and undamaged.
Fan unit
The fan motor does not require regular maintenance
because it has permanently lubricated bearings.
Cleaning
The best method of cleaning the air heater unit’s fin heat
exchanger is to use compressed air or a high pressure
washer. The nozzle should always be held at right angles
to the surface of the fins and not closer than 150 mm so
as not to damage the fins, see Figure 12. Fins damaged
during cleaning can be straightened using a fin comb
(accessory QLAZ-20).
Min 150 mm
Figure 12. Cleaning the fin heat exchanger
When cleaning with compressed air:
1. Switch off the mains supply to the air heater unit.
2. Dismantle the top and bottom sections.
3. Set the air deflectors at right angles to the surface of
the fins in order to clean against the air direction.
When cleaning with a high pressure washer:
1. Switch off the mains supply to the air heater unit.
2. Dismantle the top and bottom sections to improve
accessibility.
3. Cover the motor with plastic or place a board in front of
the fan to protect the motor from moisture.
4. Set the air deflectors at right angles to the surface of
the fins in order to clean against the air direction.
5. Spray environmentally friendly cleaning agent at low
pressure onto the fin heat exchanger.
6. High pressure wash with water after 10–12 minutes.
Remember to hold the nozzle at right angles to the
surface of the fins.
7. Check that no remnants of the cleaning agent are left
after cleaning, since they can bind fresh dust.
Spare parts
In installations with very high demands on availability,
we recommend that one fan unit is kept as a spare part.
NOTE:
Fan units kept as spare parts should be stored
indoors in dry and dust-free conditions.
NOTE:
Only parts and materials recommended by Luvata
are to be used in order for the warranty specified in the
order confirmation to be valid.
Replacing the air filter
The air filter must be replaced regularly to avoid any
deterioration in the operation of the air heater unit.
1. Switch off the mains supply to the air heater unit.
2. Dismantle the filter cover. Refer to Figure 13 and
Figure 14 for the location.
3. Remove the dirty filter. Remember that the filter may
be very dusty.
4. Fit the new filter.
5. Close the filter cover.
6. Start the air heater unit.
Figure 13. Filter cover for air heater unit with mixing section
Figure 14. Filter cover for air heater unit with air recirculation section
Maintenance and service
