54
Centrifugal Chillers
IM 1044-2
Maintenance Schedule
Maintenance Check List Item
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5
-Yr
A
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I. Unit
· Operational Log
O
· Analyze Operational Log
O
· Refrigerant Leak Test Chiller
O
· Test Relief Valves or Replace
X
II. Compressor
· Vibration Test Compressor
X
A. Motor
· Meg. Windings (Note 1)
X
· Ampere Balance (within 10% at RLA)
O
· Terminal Check (Infrared temperature measurement)
X
· Motor Cooling Filter Drier Pressure Drop
X
B. Lubrication System
· Clean Oil Cooler Strainer (water)
X
· Oil Cooler Solenoid Operation
O
· Oil Appearance (clear color, quantity)
O
- Oil Filter Pressure Drop
O
· Oil Analysis (Note 5)
X
· Oil change if indicated by oil analysis
X
III. Controls
A. Operating Controls
· Calibrate Temperature Transducers
X
· Calibrate Pressure Transducers
X
· Check Vane Control Setting and Operation
X
· Verify Motor Load Limit Control
X
· Verify Load Balance Operation
X
· Check Oil Pump Contactor
X
B. Protective Controls
· Test Operation of:
Alarm Relay
X
Pump Interlocks
X
Guardistor and Surgeguard Operation
X
High and Low Pressure Cutouts
X
Oil Pump Pressure Differential Cutout
X
Oil Pump Time Delay
X
Continued on next page.
