Maintenance & Repair; Replacing A Compressor; Condenser Fins; Electrical Connections - Emerson Copeland EazyCool ZX Series Manual

5 Maintenance & repair
5.1

Replacing a compressor

CAUTION
Inadequate lubrication! Bearing destruction! Exchange the accumulator
after replacing a compressor with a burned out motor. The accumulator oil
return orifice or screen may be plugged with debris or may become plugged.
This will result in starvation of oil to the new compressor and a second
failure.
In the case of a motor burnout, the majority of contaminated oil will be removed with the
compressor. The rest of the oil is cleaned through the use of suction and liquid line filter driers. A
100% activated alumna suction line filter drier is recommended but must be removed after 72
hours. It is highly recommended that the suction accumulator be replaced if the system
contains one. This is because the accumulator oil return orifice or screen may be plugged with
debris or may become plugged shortly after a compressor failure. This will result in starvation of
oil to the replacement compressor and a second failure. When a single compressor or tandem is
exchanged in the field, it is possible that a major portion of the oil may still be in the system.
While this may not affect the reliability of the replacement compressor, the extra oil will add to
rotor drag and increase power usage.

De-energize the condensing unit before any intervention.

Unscrew and lift the housing top panel to get access from the top to the compressor.

Close Rotalock valves or ball valve to isolate the compressor from the system and unscrew
the flare Rotalock connector from the compressor.

Release the compressor mounting parts then lift it to replace with a new compressor.
For more detailed instructions, please refer to the compressor application guideline.
5.2

Condenser fins

CAUTION
Do not use acidic solutions to clean the coil. After cleaning, the fins should
be brushed lightly with a proper fin comb.
Condenser fins become dirty over time as ambient air is induced to the condenser. Dirty coil
surfaces result in high condensing temperatures and poor unit performance. Regular cleaning is
recommended, the frequency of doing so being dependent on the installation and the
surrounding environment. As a general guide it is advisable to do this at least once every two
months.
As a general rule and for a clean environment we recommend the fins be cleaned with liquid
detergent diluted with clean water. The ZX has a well designed chassis with falling levels
towards a large drainage hole and provided the unit is installed level, any cleaning solution
should be able to drain away. A light brush downward (in the direction of the fins) should be
done before washing to remove heavy deposits.
5.3

Electrical connections

CAUTION
Make sure to turn off the unit isolating switch before undertaking this work!
All condensing units generate vibration of some degree. The ZX is no exception except the
vibration levels from the compliant scroll technology is less severe than units employing
reciprocating compressors. Because of this, the ZX can be mounted on simple, less expensive
rubber strips. Over time however and also due to temperature extremes within the unit housing,
electrical terminations can come loosened.
C6.1.6/1108-0509/E 21