5. MAINTENANCE
26
5.6 Heating coil
The following steps should be taken to maintain the heating coil:
•
Check the coils for dust or dirt. If necessary, clean the aluminium fins by a soft brush
or a vacuum cleaner.
•
Straighten any bent slats using appropriate tools
•
Air the coil circuits through the exhaust valves of the pipe system (air in the pipe system
may reduce the capacity)
•
Check that the frost sensor is properly fixed.
5.7 Cross flow heat exchanger
The cross flow heat exchanger has no mechanical part, therefore only the plates should be
checked and cleaned if necessary. Clean the plates with a soft brush or use high pressure
cleaner with compressed air and blow against the air stream.
5.8 Dampers
The following steps should be taken to maintain the dampers of the unit. Please refer to section
4. Commissioning to see which dampers you have in your unit and what functions they have.
•
Check that the damper setting is in accordance with the current operation mode (every
6 month).
•
Check that the damper louvers can rotate when the damper motor is running and that
they close/open completely (every 6 month).
•
Check the fixing of the motor/damper shaft. To get access to the recirculation damper
of the XWPRS you have to remove the outer cabinet panel and the inner air guiding
plate (every 12 month).
•
If necessary, clean the damper louvers either dry or wet (every 12 month).
•
Check the rubber gaskets for damage (every 12 month).
5.9 Cooling circuit
The following steps should be taken to maintain the evaporator and condenser coil of the
cooling circuit:
•
Check the coils for dust or dirt. If necessary, clean the aluminium fins by a soft brush
or a vacuum cleaner. To get full access to the evaporator you may have to remove the
drop catcher (see 5.10)
•
Straighten any bent slats using appropriate tools.
•
Check that the frost sensor is properly fixed in the evaporator coil.
The following steps should be taken to check the cooling circuit:
•
Close all inspection doors and start up the unit. Wait for a few minutes and check the
LP/HP gauge. The HP gauge should show between 35-50 °C and the LP gauge about
0-10°C, depending on the running and outside conditions.
Summary of Contents for DanX XWPRS Series
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