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APPENDIX C — MAINTENANCE SUMMARY AND LOG SHEETS
19DV Maintenance Interval Requirements
NOTE: Equipment failures caused by lack of adherence to the Mainte-
nance Interval Requirements are not covered under warranty.
WEEKLY
COMPRESSOR None CONTROLS Review PIC5 Alarm/Alert History.
COOLER None. VFD None.
CONDENSER None. OIL RECLAIM None.
MONTHLY
COMPRESSOR None. CONTROLS Review and record purge operating time.
ANNUALLY
COMPRESSOR
Change lubrication assembly refrigerant and bearing
filters. Leak test. Vibration trending.
CONTROLS
Perform general cleaning. Tighten connections. Check
pressure transducers. Confirm accuracy of thermistors.
COOLER
Inspect and clean cooler tubes. Confirm there is no
foreign debris in the tubes or waterboxes from the
water system. Inspect all pressure relief devices. Leak
test. Verify water pressure differential. Inspect water
pumps. Send refrigerant sample out for analysis.
Replace liquid strainer in inhibitor reclaim line (closes
to cooler inlet).
VFD
Perform general cleaning. Tighten connections. Change
refrigerant/motor filter feeding VFD devices. Perform
visual inspection of the capacitors located on the DC
bus and inductors. Check cooling fan operation. Check
condensate drain for the VFD enclosure. Change VFD
strainer.
CONDENSER
Inspect and clean condenser tubes. Leak test. Verify
water pressure differential. Inspect water pumps and
cooling tower.
PURGE
Record total purge Pumpout Numbers and Pumpout
Time. If excessive then leak test and correct. Inspect
moisture sight glasses in line to bearings and VFD.
Replace purge strainer in drain line.
LUBRICATION
ASSEMBLY
Replace both refrigerant filter and bearing filter.
EVERY 3-5 YEARS
COMPRESSOR None. CONTROLS None.
COOLER Perform eddy current test. VFD None.
CONDENSER
Inspect float valves and strainers. Perform eddy cur-
rent test.
PURGE None.
EVERY 5 YEARS
COMPRESSOR
Add dose of Carrier Inhibitor (500 ppm). Replace gas
strainer prior to eductor (or when refrigerant is
removed).
CONTROLS None.
COOLER None. VFD None.
CONDENSER None. PURGE
LUBRICATION
ASSEMBLY
Replace lubrication assembly suction strainers (or when refrigerant is removed).
SEASONAL SHUTDOWN
COMPRESSOR None. CONTROLS Do not disconnect control power.
COOLER
Isolate and drain waterbox. Remove waterbox cover
from one end. Use compressed air to clear tubes.
VFD None.
CONDENSER
Isolate and drain waterbox. Remove waterbox cover
from one end. Use compressed air to clear tubes.
PURGE Purge operation is required to remove non-condensables.
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