Emerson Precision Cooling For Business-Critical Continuity Figure i - Manual (Page 33)

Maintenance
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4.3 Compressor Replacement
Replacement compressors are available from Emerson. They will be shipped in a permanent 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. Credit for warranty replacement compressors will not be issued until the replacement 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 must be recorded by marking the
compressor return tag.
1. Disconnect power.
2. Attach suction and discharge gauges to access fittings.
3. Recover refrigerant using approved recovery procedures and equipment. Use a filter drier when
charging the system with recovered refrigerant.
4. Unsweat refrigerant connections and disconnect electrical connections.
5. Remove failed compressor.
6. Install replacement compressor and make all connections.
7. Pressurize and leak test the system.
8. Follow manufacturer’s instructions for cleanout kits.
9. Evacuate the system twice to a minimum 250 microns, breaking the vacuum with dry nitrogen
each time. The third time, evacuate to 250 microns and verify the above levels are maintained for
at least one minute after the unit is isolated by a shutoff valve from the vacuum pump.
10. With the system in a 250 micron or lower vacuum, charge the system with liquid refrigerant
based on requirements of the evaporator, condensing unit and lines. Refer to 2.5.6 - General
System Charge Requirements or unit nameplate for system charge requirements.
11. Apply power and operate system. Check for proper operation. Refer to design pressures in
Table 13.
!
CAUTION
Do not loosen any refrigeration or electrical connections before relieving pressure.
NOTE
Release of refrigerant to the atmosphere is harmful to the environment. Refrigerant must be
recycled or discarded in accordance with federal, state, and local regulations.