Kairak Multi-Circuited Refrigeration System KMR-12

Electrical Connections and Fan Maintenance

Tighten all electrical connections

Coil and Control System Maintenance

Check the operation of the control system

Ensure the electrical power to the heaters is turned off

Disconnect heater leads on both ends of the heater to be removed

Remove the sheet metal screws holding the heater retainer to the heater plate on the electrical connection end of the unit

Pull the heater(s) to be replaced out of the tube holes in the coil

Lower the drain pan to remove the bottom heater

Uncoil about one foot of the straight end of the replacement heater

Electrical Connections Inspection

Check all electrical connections for tightness

Are all electrical connections tight?

Describe any issues found with electrical connections

Refrigerant Connections Inspection

Inspect refrigerant connections for looseness

Are all refrigerant connections secure?

Is there a need to add refrigerant?

Perform a leak check on all refrigerant connections if refrigerant was added

Ensure the main disconnect switch is in the OFF position

Remove dust, leaves, and debris with a brush

Use a vacuum cleaner to clean the condenser

Is the condenser operating in a dusty location?

Check the oil level in the motor-compressor crankcase sight glass

Is the oil level at the center of the sight glass?

Add oil to bring the level up to the center of the sight glass if necessary

Take an oil sample for quality inspection

Perform a visual examination of the compressor oil

Conduct an acid test on the oil sample

Contamination and Pressure Check