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7.4. Motor
The motor is permanently lubricated, therefore no periodical maintenance is
required.
7.5. Heat exchanger coil
Isolate the electrical supply.
Isolate flow and return pipework to both heating and cooling connections.
Drain down coils.
The coil should be inspected, at the same time as cleaning the filter, to ascertain
if any solids or foreign matter has accumulated between the fins and that the
coil connections are free from leaks. The coil should be cleaned by using a soft
brush or vacuum cleaner and great care must be taken not to damage the fins,
If fins become contaminated too frequently it is advisable to check the air filter to
ensuring it is functioning correctly. Remove flow and return pipework to valves
and condensate pipe.
Support weight of coil and remove the six M6 bolts holding the coil to the rear of
the unit. Slide out the condensate tray and coil assembly from unit.
To reinstall, follow the reverse procedure, ensuring the electrical supply is
isolated. The coil must be vented when refilling with water.
7.6. Drain Pan
Drain pan may be removed for cleaning independently of the coil and should be
inspected annually. Lock open and tag unit electrical service switch. Check drain
pan, drain line and trap at start of each cooling season. A standard type pipe
cleaner for 3/4-in. ID pipe can be used to ensure that pipe is clear of obstruction
so that condensate is carried away.
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