Trane Stealth™ Air-Cooled Chiller SCWF46

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.

Check for evidence of water leakage at the valve stem

Remove actuator motor from support plate.

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, starting from the top of the coil and working downward. Clean the leaving air side of the coil first, then the entering air side. Use a block-off to prevent steam from blowing through the coil and into a dry section of the unit.

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

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

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