Trane Stealth™ Air-Cooled Chiller SCWH0304

Perform all monthly maintenance inspections

Perform seasonal startup checks

Inspect contacts of fan motor contactors and relays

Clean and repaint any corroded surface

Sign off on the yearly maintenance check

WARNING: Hazardous Voltage! Disconnect all electrical power including remote disconnects before servicing unit. Follow proper lockout/tagout procedures to ensure power cannot be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

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

Inspect coils for icing. Icing on the coils may indicate low airflow supply, restricted airflow from dirty fins.

Check the fan belt condition and tension. Adjust tension if belt is floppy or squeals continually.

Check and record operating pressures.

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.

Sign off on the yearly maintenance

Remove all mid and top fan section panels

Loosen the brackets inside the unit that clamp the mid and fan sections together

Remove the control box cover and disconnect the motor power wires. Feed wires up through the unit and secure out of the way until rotation is complete

Rotate the fan section to desired position

Re-route the motor power wires back to the control box. Ensure all wiring is free and not routed over any sharp edges

Reconnect the motor power wires per the unit wiring diagram

Bolt and/or clamp all brackets back into place

Replace control box cover and all exterior panels

Verify the fan rotation and motor amp draw

Verify the fan motor is properly aligned and bolted tight to the motor frame.

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.

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

Sign off on the chiller maintenance