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26 TRG-TRC012-EN
notes
period four
Maintenance Considerations
The American Society of Heating, Refrigerating and Air Conditioning Engineers
(ASHRAE) has published Guideline 3 titled
Reducing Emission of Halogenated
Refrigerants in Refrigeration and Air Conditioning Equipment and Systems
.
This guideline includes a recommended list of data points to be logged daily for
each chiller. Much of this data may be available through the chiller’s control
panel.
Special attention should be given to the following:
■ Review the operating log and trends
■ Measure the oil pressure drop to determine if the oil filter needs to be
replaced
■ Measure refrigerant superheat and subcooling
■ Measure both the refrigerant and oil charges
operating log
ASHRAE Guideline 3
▲ Chilled water inlet and outlet
temperatures and pressures
▲ Chilled water flow
▲ Evaporator refrigerant
temperature and pressures
▲ Evaporator approach
temperature
▲ Condenser water inlet and
outlet temperatures and
pressures
▲ Condenser water flow
▲ Condenser refrigerant
temperature and pressures
▲ Condenser approach
temperature
▲ Compressor refrigerant suction
and discharge temperatures
▲ Refrigerant level
▲ Oil pressures, temperature, and
levels
▲ Addition of refrigerant
▲ Addition of oil
▲ Vibration levels
Figure 39