Periodic
Maintenance
Checklist
Maintenance Procedures
Filters
Maintenance
Listed below are the recommended maintenance schedules. Instruc- tions for specific maintenance procedures are given in the sections following the checklist.
!WARNING: Allow rotating fan to stop before servicing equipment. Failure to do so may cause severe personal injury or death.
Monthly
1.Inspect the unit air filters. Clean or replace dirty filters.
Note: Building conditions may require filter change more or less frequently.
2.Check the main and auxiliary drain pans on
Yearly
1.Inspect the unit cabinetry for chips or corrosion. Clean or repair to provide unit protection.
2.Inspect the fan wheel and housing for damage. Rotate the fan wheel manually to be sure movement is not blocked by obstructions.
3.Inspect the coil fins for excessive dirt or damage. Remove dirt and straighten fins.
4.Clean and tighten all electrical connections.
5.Inspect the strainer option for debris trapped in the filter screen.
Change or clean air filters at least twice a year. Filters require more frequent care under high load or dirty air conditions since a clogged filter reduces airflow. Table 37 on page 89 lists filter sizes for units.
Throwaway and pleated media filters are available for all units. Follow the instructions below to replace the disposable filters.
1. All models except vertical cabinets
Remove the front panel of the vertical recessed unit and open the bottom panel door of the horizontal cabinet and horizontal recessed unit to access the filter. The front panel of the vertical cabinet unit does not require removal to change the filter.
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