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.
