Trane Stealth™ Air-Cooled Chiller SCWF100

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.

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

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.

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.

Shim under the motor or fan bearings to obtain proper alignment if necessary.

Inspect unit air filters for blockages or dirt.

Clean or replace air filters if airflow is blocked or filters are dirty.

Inspect coils for excess moisture or icing.

Describe any issues found with coil icing or moisture.

Check that condensate flows freely through piping, traps, drain pan, and drainage holes.

Remove algae or airflow obstructions if present.

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