©2009McQuay
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4 Servicing and Maintenance
Servicing
Service and maintenance are to be performed only by qualified personnel who are well trained with
refrigeration engineering. Before restart the unit, do a thorough check and analysis of the unit safety
control component.
The optimum design of the refrigerating system eliminates the possibility of problems being occurred
during normal operation. There is no need to conduct any maintenance to refrigerant piping if the unit is
under normal running.
McQuay designers have given full consideration to make servicing convenient during unit development.
After opening service panel, both servicing and maintenance can be easily carried out.
Under normal environment, the only work needed is checking the return air way and cleaning the heat
exchange surface regularly at month or season interval decided on operating condition.
If the surrounding is very dirty or oily, for maintaining superior performance and sufficient capacity,
please ask specialized personnel to do regular cleaning of heat exchanger.
Maintenance
For keeping consistent performance and durability with safe, effective and long-life operation, always
conduct proper and regular maintenance to the unit.
For long period of operation time, the heat exchanger will become dirty impairing its effectiveness and
reducing the performance of the air conditioner. Consult your local dealer on the cleaning of the heat
exchanger.
No main maintenance or servicing needed for the internal water circuit unless the water pump is failure.
It is advised that regular check on the strainer should be conducted and replaced the water strainer if the
strainer is dirty or clogged.
Always check the water level in the system, for the target of protecting the moving components in the
hydraulic kit from overheating, excessive wearing and water freeze.
All the chilled water in the hydraulic system must be drained out completely during unit shutdown in
winter, to avoid water piping damage due to freeze.
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