88
CVHE-SVX005C-EN
NOTICE
Equipment Damage!
Failure to remove the strain relief with the sensor
could result in equipment damage.
Do NOT attempt to pull sensor bulb through the strain
relief; always remove the entire strain relief with the
sensor.
Table 21. Recommended maintenance
Daily Every 3 months Every 6 months Annually
(a)
,
(b)
Check the chiller’s evaporator and
condenser pressures, oil tank
pressure, differential oil pressure, and
discharge oil pressure. Compare the
readings with the values provided in
the preceding table.
Check the oil level in the chiller oil
sump using the two sight glasses
provided in the oil sump head. When
the unit is operating, the oil level
should be visible in the lower sight
glass.
Complete logs on a daily basis.
Clean all water strainers in the water
piping system.
Lubricate the vane control linkage
bearings, ball joints, and pivot points.
Lubricate vane operator tang O-rings.
Operate the tang operators manually
and check for any abnormalities.
Lubricate the oil filter shutoff valve O-
rings.
Drain contents of the rupture disk and
purge discharge vent-line drip-leg into
an evacuated waste container. Do this
more often if the purge is operated
excessively. Apply oil to any exposed
metal parts to prevent rust.
Shutdown the chiller once each year to check the items
listed on the “Appendix D: CenTraVac™ Chiller Annual
Inspection List,” p. 102 (refer to “Appendix A: Forms
and Check Sheets,” p. 97).
For R-514A chillers, perform the annual maintenance
procedures referred to in Installation, Operation, and
Maintenance: Purge System for Water-Cooled
CenTraVac™ Chillers with Symbio™ Control, R-514A
Refrigerant (PRGG-SVX002*-EN).
Use an ice water bath to verify the accuracy of the
evaporator refrigerant temperature sensor (4R10). If the
sensor is exposed to temperature extremes outside its
normal operating range (0°F to 90°F [-17.8°C to 32.2°
C]), check its accuracy at six-month intervals.
Inspect the condenser tubes for fouling; clean if
necessary.
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.
(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.
Recommended Maintenance
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