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Maintenance
12.8Compressor Replacement
Replacement compressors are available through your local Emerson office. Compressors are shipped in reusable packaging. If unit is under warranty, complete and include Liebert Service Credit Appli- cation (LSCA) with the compressor that is being returned. The original compressor should be returned in the same packaging.
12.8.1Compressor Motor Burnout
If a burnout has occurred, a full system
For
12.8.2Digital Compressor Unloading Solenoid(s) Models 028, 035 and 042
When replacing a digital scroll compressor, digital solenoid valve and coil must be replaced. Compres- sor and valve kit are shipped separately. Valve kit must be
Models 053, 070 and 077
When replacing a digital scroll compressor, digital solenoid coil must be replaced. Compressor and coil kit are shipped separately.
12.8.3Compressor Replacement Procedure
1.Disconnect power and follow all warnings at front of this manual.
2.Attach suction and discharge gauges to access fittings.
3.
4.Remove marked pressure transducer and discharge pressure switch. Disconnect all electrical connections.
5.Detach service valves from compressor.
6.Remove failed compressor.
7.If required, follow compressor manufacturer’s suggested
8.Install replacement compressor and make all connections. Replace gaskets or seals on service valves. Replace unloading solenoid.
9.Evacuate, charge and operate per 8.3 - Dehydration/Leak Test and Charging Procedures for
10.
! CAUTION
Risk of improper component reinstallation. Can cause equipment damage.
Identify and mark location of suction pressure transducer and discharge pressure switch. These devices look similar and they must be reinstalled in their original location.
12.9Facility Fluid and Piping Maintenance
Facility water and glycol quality remain a requirement throughout the life of the piping system. Fluid and piping system maintenance schedules must be established and performed. A local fluid mainte- nance program must be established that will evaluate fluid chemistry and apply necessary treatment. A periodic leak inspection of facility and unit fluid piping is recommended. Refer to 8.1.3 - Require- ments of Systems Using Water or Glycol.
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