Trane Stealth™ Air-Cooled Chiller SCWF25

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.

Remove actuator motor from support plate.

Torque the packing nut to 10-ft.-lbs. of torque.

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

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.

Fan Drive Maintenance Procedures

Rotate the fan wheel to ensure it turns freely in the proper direction and is not rubbing on the fan housing or inlet.

Is the fan wheel centered properly?

Check the position of both shafts to ensure they operate parallel to each other.

Record any initial observations or concerns about 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

Steam and Hot Water Coils Maintenance

Disconnect all electrical power to the unit

Wear appropriate personal protective equipment (PPE)

Access both sides of the coil section

Use a soft brush to remove loose debris from both sides of the coil

Use a steam cleaning machine to clean the coil, starting from the top and working downward

Repeat steam cleaning as necessary and confirm that the drain line is open

Allow the unit to dry thoroughly before putting the system back into service

Straighten any coil fins that may be damaged with a fin rake