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Table 25. Recommended maintenance (continued)
Daily
(a)
Every three years, use a non-destructive tube test to inspect the condenser and evaporator tubes. It may be desirable to perform tube tests on these components at more
frequent intervals depending upon chiller application. This is especially true of critical process equipment. Ask your Sales account manager for a copy of engineering bulletin
(CTV-PRB024*-EN) for clarification of the role of eddy current testing in chiller maintenance by providing information about eddy current technology and heat exchanger
tubing.
(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 26. Recommended maintenance of optional features
Every 3 months
Feature
Inspect waterbox coatings within the first 1–
3 months to determine a required
Waterbox Coatings
maintenance schedule for your job site. Refer
to
"Waterbox and Tubesheet Protective
Coatings," p. 107
Inspect waterbox anodes within the first 1–
3 months to determine a required
Waterbox Anodes
maintenance schedule for your job site. Refer
to
"Sacrificial Anodes," p. 107
information.
Gantries
Hinges
Recommended Compressor Oil
Change
After the first six months of accumulated operation or after
1000 hours operation—whichever comes first—it is
recommended to change the oil filter. 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. Due to the new
refrigerant and oil combination, the oil analysis should be
performed by the Trane Chemical Laboratory.
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. An access valve is installed in
the oil supply line, before the oil filter, for obtaining oil
samples.
CDHH-SVX003C-EN
Every 3 months
Every 6 months
for more information.
for more
Every 6 months
Annually
Lubricate the gantries annually. Use ConocoPhillips MegaPlex®
XD3 (gray in color), LPS® MultiPlex Multi-Purpose (blue in color),
or equivalent.
Lubricate the hinges annually. Use ConocoPhillips MegaPlex®
XD3 (gray in color), LPS® MultiPlex Multi-Purpose (blue in color),
or equivalent.
Notes:
•
Use only Trane OIL00022 (2.5 gallons[9.5 L])
compressor oil and verify proper refrigerant and
oil for your chiller before proceeding! A full oil
change is 21 gallons (79.5 L) of oil.
•
One spare compressor oil filter (per circuit) is
provided with each new chiller. If not used
earlier, use at first recommended compressor
oil and filter change.
•
This recommended compressor oil change is
NOT covered by factory warranty.
Purge System
Leak Checking Based on Purge Pump
Out Time
The following figure has been developed to aid in
determining when to do a leak check of a chiller based on
the purge pump-out time and unit size. This figure depicts
normal purge pump-out times, small leaks, and large leaks
based on chiller tonnage.
Recommended Maintenance
,
Annually
(a)
(b)
Inspect and clean the ifm efector® flow detection
sensors. Use Scotch-Brite® or other non-abrasive
material to clean scale; do NOT use steel wool, which
could cause the probe to rust.
Submit a sample of the compressor oil to a Trane-
qualified laboratory for comprehensive analysis.
Measure the compressor motor winding resistance to
ground; a qualified service technician should conduct
this check to ensure that the findings are properly
interpreted. Contact a qualified service organization to
leak-test the chiller; this procedure is especially
important if the system requires frequent purging.
105
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