periodic
Maintenance checklists
Periodic Checklists
Monthly Checklist
The following checklist provides the recommended maintenance schedule to keep the unit running efficiently.
WARNING
Hazardous voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.
1.Inspect unit air filters. Clean or replace if airflow is blocked or if filters are dirty.
2.Inspect coils for icing. Icing on the coils may indicate low airflow supply, restricted airflow from dirty fins.
3.Check the fan belt condition and tension. Adjust tension if belt is floppy or squeals continually.
4.Check and record operating pressures.
1.Verify the fan motor is properly aligned and bolted tight to the motor frame.
2.Lubricate fan bearings.
3.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.
4.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.
Annual Maintenance
Check and tighten all set screws, bolts, locking collars and sheaves.
1.Inspect, clean, and tighten all electrical connections.
2.Visually inspect the entire unit casing for chips or corrosion. Remove rust or corrosion and repaint surfaces.
3.Visually check for leaks in refrigerant piping.
4.Inspect fan, motor, and control contacts. Replace badly worn or eroded contacts.
5.Inspect the thermal expansion valve sensing bulbs for cleanliness, good contact with the suction line, and adequate insulation from ambient air.
WARNING
Live electrical components! During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
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