Trane Stealth™ Air-Cooled Chiller SCWF80

Verify the fan motor is properly lubricated

Note: The bearings are manufactured using a special synthetic lithium-based grease designed for long life and minimum lube intervals. Over lubrication can be just as harmful as not enough.

With power disconnected, manually rotate the fan wheel to check for obstructions in the housing or interference with fan blades. Remove obstructions and debris. Center the fan wheel if necessary.

Check the fan assembly sheave alignment. Tighten set screws to their proper torques.

Check water valves for leakage at valve stem packing nut.

Note: Perform this procedure monthly if the unit is in a coastal or corrosive environment.

Sign off on the chiller maintenance

Check the condensate drain pan and drain line to ensure that the condensate drains properly at least every six months or as dictated by operating experience.

If evidence of standing water or condensate overflow exists, take steps to identify and remedy the cause immediately. Refer to the troubleshooting section of this manual for possible causes and solutions.

Hazardous Voltage w/Capacitors!

Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

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. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer's literature for allowable waiting periods for discharge of capacitors.

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

For additional information regarding the safe discharge of capacitors, see PROD-SVB06 *- EN.

Clean drain pans using the following procedure:

Hazardous Voltage w/Capacitors!

Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

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. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors.

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

For additional information regarding the safe discharge of capacitors, see PROD-SVB06*-EN.

Water valves have a stern packing nut. If there is evidence of water leakage at the valve stem, proceed as follows:

1. Remove actuator motor from support plate.

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

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.

Inspect fan, motor, and control contacts. Replace badly worn or eroded contacts.

Inspect the thermal expansion valve sensing bulbs for cleanliness, good contact with the suction line, and adequate insulation from ambient air.

Verify the superheat setting is 12 -17°F at the compressor.

When checking operating pressures and conditions, establish the following nominal conditions for consistent measurements.

Leaving air temperature greater than 60°F

Hazardous Voltage w/Capacitors!

Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

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. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer's literature for allowable waiting periods for discharge of capacitors.

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

For additional information regarding the safe discharge of capacitors, see PROD-SVB06 *- EN.

Perform the following procedures according to the "Maintenance Periodic Check List":

1. Rotate the fan wheel to ensure it turns freely in the proper direction and is not rubbing on the fan housing or inlet. If necessary, center the fan wheel again.

2. Check the position of both shafts. Fan and motor shafts should operate parallel to each other for maximum belt and bearing life. Shim as necessary under the motor or fan bearings to obtain proper alignment.