Unit heater operation verification
The YVAM chiller uses various heaters to protect all of the devices that are susceptible to low
ambient temperature limits. As part of the commissioning process of the chiller, it is important to
verify operation of these heaters to ensure reliability of these various components. Verification
of heater operation should be logged using the current values for each heater in
Form 160.88-
CL2
during chiller commissioning. Refer to the
Maintenance
section in
Form 160.88-OM1
for the
instructions to test each device.
WARNING
All appropriate electrical safety measures must be followed when testing these heaters since these
circuits will be energized.
CAUTION
The evaporator water loop must be filled before conducting the following tests to prevent damage to
the heaters for the evaporator related components.
The following is a list of the devices that must be verified:
•
Evaporator waterbox heaters WBH1 and WBH2
•
Evaporator shell heaters EVH1 and EVH2
•
Heat trace for VSD coolant HT1 and HT2
•
VGD actuator heater mat
•
MBC heater mat
•
VSD internal heater
•
OptiView Control Panel heater
•
OptiView Control Panel cooler
•
UPS panel heating
YVAM Air-Cooled Centrifugal Liquid Chiller
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