Trane Stealth™ Air-Cooled Chiller SCWF90

WARNING: Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing.

Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.

Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.

Refer to manufacturer's literature for allowable waiting periods for discharge of capacitors.

Disconnect all electrical power to the unit.

Wear the appropriate personal protective equipment (PPE).

Ensure you have the necessary tools

Measure belt span between centers of sheaves (in inches)

Calculate deflection by dividing belt span by 64

Set the large 'O' ring of the tensioning gauge at 1/64 inch for each inch of belt span

Place the large end of the gauge at the center of the belt span and press down until the large 'O' ring is even with the top of the belt line

Place a straight edge across the sheaves as a reference point

Fan Motor and Bearings Maintenance

Verify the fan motor is properly lubricated.

Lubricate fan bearings during unit operation.

Disconnect power before manual inspection.

Manually rotate the fan wheel to check for obstructions.

Remove obstructions and debris from the fan housing.

Center the fan wheel if necessary.

Record any initial observations or issues with belt tension

Loosen bolts A, B, and E on both sides of the sliding motor base

Loosen nuts C and D as required for motor horsepower

Slide the motor on its mounting plate to adjust tension

Adjust nuts A-D and bolt E without stretching the belts over the sheaves

Check and tighten all set screws, bolts, locking collars and sheaves

Electrical Connections Inspection

Inspect, clean, and tighten all electrical connections

Visually inspect the entire unit casing for chips or corrosion

Remove rust or corrosion and repaint surfaces

Visually check for leaks in refrigerant piping

Fan, Motor, and Control Contacts Inspection

Inspect fan, motor, and control contacts