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89
Table 21. Recommended maintenance (continued)
(b)
Contact a qualified service organization to determine when to conduct a complete examination of the unit to discern the condition of the compressor and internal
components. Check the following: chronic air leaks (which can cause acidic conditions in the compressor oil and result in premature bearing wear) and evaporator or
condenser water tube leaks (water mixed with the compressor oil can result in bearing pitting, corrosion, or excessive wear).
Table 22. Recommended maintenance of optional features
Feature
Every 3 months Every 6 months Annually
Waterbox Coatings
Inspect waterbox coatings within the first 1–
3 months to determine a required
maintenance schedule for your job site. Refer
to “Waterbox and Tubesheet Protective
Coatings,” p. 92 for more information.
Waterbox Anodes
Inspect waterbox anodes within the first 1–
3 months to determine a required
maintenance schedule for your job site. Refer
to “Sacrificial Anodes,” p. 92 for more
information.
Gantries
Lubricate the gantries annually. Use ConocoPhillips MegaPlex®
XD3 (gray in color), LPS® MultiPlex Multi-Purpose (blue in color),
or equivalent.
Hinges
Lubricate the hinges annually. Use ConocoPhillips MegaPlex®
XD3 (gray in color), LPS® MultiPlex Multi-Purpose (blue in color),
or equivalent.
Recommended Compressor Oil
Change
NOTICE
Equipment Damage!
Mixing refrigerants or oils could result in equipment
damage including bearing damage, introduction of
acids into the chiller, or continuous purge pump-out
in high-head/high ambient applications.
CenTraVac™ chillers are manufactured with different
refrigerant/oil systems: 1) chillers using R-123
refrigerant and OIL00022 compressor oil, and 2)
chillers using R-514A refrigerant and various Trane
POE-based compressor oils.
Always verify proper refrigerant and oil for your
chiller. Do NOT mix refrigerants and oils.
This Installation, Operation, and Maintenance manual
applies to CenTraVac™ chillers with two different
refrigerant and compressor oil systems:
• R-123 refrigerant and OIL00022 compressor oil.
• R-514A refrigerant and Trane OIL00379/OIL00380
compressor oil.
NOTICE
Equipment Damage!
Failure to follow instructions below could result in
equipment damage.
Follow oil use instructions for post-service
compressor air-run procedures.
For post-service compressor air-run procedures on
CenTraVac™ chillers that use R-514A refrigerant and POE
oil:
1. Use Trane OIL00381/OIL00382 compressor oil for the
air-run procedure.
2. Upon completion of the air-run procedure, drain the
OIL00381/OIL00382 from the sump.
3. After unit final assembly and evacuation, refill the sump
with Trane OIL00379/OIL00380.
Important: Verify proper refrigerant and compressor oil for
your chiller before proceeding!
After the first six months of accumulated operation or after
1000 hours operation—whichever comes first—it is
recommended to change the oil and filter. After this oil
change, it is recommended to subscribe to the Trane
annual oil analysis program rather than automatically
change the oil as part of scheduled maintenance. Change
the oil only if indicated by the oil analysis. Using an oil
analysis program will reduce the chiller’s overall lifetime
waste oil generation and minimize refrigerant emissions.
The analysis determines system moisture content, acid
level, and wear metal content of the oil, and can be used as
a diagnostic tool. The oil analysis should be performed by a
qualified laboratory that is experienced in refrigerant and oil
chemistry and in the servicing of Trane® centrifugal
chillers.
In conjunction with other diagnostics performed by a
qualified service technician, oil analyses can provide
valuable information on the performance of the chiller to
help minimize operating and maintenance costs and
maximize its operating life. A valve is installed next to the
oil filter for the purpose of obtaining oil samples.
Recommended Maintenance
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