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Preventive Maintenance Checklist
The following is a sample of a typical dual-circuit chiller checklist.
Maintenance Activity
Week Number
1
2
3
4
5
6
7
8
9
10
11
12
Date
Temperature Control
Pump Discharge Pressure
Refrigerant Suction Pressure #1
Refrigerant Suction Pressure #2
Refrigerant Discharge Pressure #1
Refrigerant Discharge Pressure #2
Refrigerant Sight Glass #1
Refrigerant Sight Glass #2
Check and clean evaporator Y-strainer
Electrical Connections
Incoming Voltage
Compressor #1 L1 Amps
Compressor #1 L2 Amps
Compressor #1 L3 Amps
Compressor #2 L1 Amps
Compressor #2 L2 Amps
Compressor #2 L3 Amps
Compressor #3 L1 Amps
Compressor #3 L2 Amps
Compressor #3 L3 Amps
Compressor #4 L1 Amps
Compressor #4 L2 Amps
Compressor #4 L3 Amps
Refrigerant Circuit #1 Superheat
Refrigerant Circuit #2 Superheat
Refrigerant Circuit #1 Sub-cooling
Refrigerant Circuit #2 Sub-cooling
*Oil Level Check #1
*Oil Level Check #2
*Oil Analysis #1
*Oil Analysis #2
* Once a year
Drawings
We have prepared a custom set of drawings for your unit and placed them inside the control panel prior to
shipment. Please refer to these drawings when troubleshooting, servicing, and installing the unit. If you cannot
find these drawings or wish to have additional copies sent, please contact our Customer Service Department and
reference the serial number of your unit.