46 PFS 155C - 315C OM 135
IV. EVAPORATOR
A. Performance evaluation (include water press. drop)# O
B. Test water quality X
C. Clean evaporator tubes X
D. Eddy current test --tube wall thickness X
E. Seasonal protection X
V. EXPANSION VALVES
A. Performance evaluation (observe superheat)# X
VI. COMPRESSOR - CHILLER UNIT
A. Performance evaluation O
B. Leak test:
• Compressor fittings and terminal X
• Pipe fittings X
• Oil pump line fittings X
• Vessel relief valves X
C. Check sightglasses and press. Drop across filter/dryer X
D. General appearance:
• Paint O
• Insulation O
VII. STARTERS
A. Examine contactors (hardware and operation) X
B. Verify overload setting and trip X
C. Test electrical connections X
D. Pump down controls (verify operation) X
VIII. OPTIONAL CONTROLS
A. Hot gas bypass controls (verify operation) X
B. Liquid injection controls (verify operation) X
C. Pump down control (verify operation) X
KEY:
O = performed by in-house personnel
X = performed by qualified HVAC service personnel
# = Test to be performed with compressor circuit in operation
Note: Some motors use power factor correction capacitors and others use a surge capacitor. In all cases,
capacitors must be disconnected from the circuit to obtain a useful megohmmeter reading. Failure to disconnect
capacitors will result in low readings. Only qualified electrical technicians should perform service.
To Next Page
Loading...
Need help?
General
