Trane Stealth™ Air-Cooled Chiller SCWF22

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

Inspect unit air filters for blockages or dirt.

Inspect coils for excess moisture or icing.

Check condensate flow through piping, traps, drain pan, and drainage holes.

Check condition and tension of fan belts.

Refrigerant and Filter Drier Inspection

Check liquid line sight glasses for bubbles.

Inspect filter driers for leaks, flow obstructions, or temperature drop.

Fan Motor and Bearings Maintenance

Verify the fan motor is properly lubricated.

Lubricate fan bearings during unit operation.

Disconnect power before inspection.

Manually rotate the fan wheel to check for obstructions or interference.

Remove obstructions and debris from the fan housing.

Center the fan wheel if necessary.

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

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 the unit center cover panel to the left of the VFD panel.

Remove and discard the sheet metal shipping screws along the top and bottom edges of the VFD panel.

Disconnect the communications cable from the keypad on the VFD door panel.

Turn the two slotted-head fasteners on the right edge of the VFD panel fully counterclockwise.

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