48 Component Operation and Maintenance
Compressor Replacement Procedure
Replacement compressors are available from your Liebert supplier. They will be shipped in a reusable
crate to the job site as required by the service contractor.
Upon shipping a replacement compressor, the service contractor will be billed in full for the compres-
sor until the failed compressor has been returned to the factory.
The compressor should be returned in the same container used for shipping to the job. The possible
damage causes or conditions that were found should be recorded by marking the compressor return
tag.
1. Disconnect power.
2. Attach suction and discharge gauges to access fittings.
3. Recover refrigerant using standard recovery procedures and equipment. Use a filter-drier when
charging the system with recovered refrigerant.
4. Front seat service valves to isolate the compressor. Reclaim charge from compressor.
5. Remove service valves, pressure switch capillaries, and disconnect all electrical connections.
6. Remove failed compressor.
7. Install replacement compressor and make all connections.
8. Pressurize and leak test the system at approximately 150 PSIG (1034 kPa) pressure.
9. Follow manufacturer’s instructions for clean out kits.
10. Follow charging instructions per the Installation Manual.
!
CAUTION
Do not loosen any refrigeration or electrical connections before relieving pressure.
NOTE
Release of refrigerant to the atmosphere is harmful to the environment and is unlawful.
Refrigerant must be recycled or discarded in accordance with federal, state, and local
regulations.
!
CAUTION
A scroll compressor must rotate in the proper direction. Record compressor motor connections
when removing failed compressor. Wire the replacement compressor motor the same way to
maintain proper rotation direction.
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