SERVICE
When servicing unit, shut off all electrical power to unit to avoid shock hazard or injury from rotating parts.
Cleaning Ð Inspect unit interior at the beginning of each heating and cooling season and as operating conditions require.
EVAPORATOR COIL Ð Clean coil as required. Inspect coil at beginning of heating and cooling seasons.
1.Turn unit power off. Remove evaporator coil access panel.
2.If economizer is installed, remove economizer by disconnecting Molex plug and removing economizer mount- ing screws. Refer to Accessory Economizer Installation Instructions or Optional Economizer sections on pages 12 and 15 for more details.
3.Slide ®lters out of unit.
4.Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash both sides of coil and ¯ush with clean water. For best results, back- ¯ush toward
5.Flush condensate pan after completion.
6.Reinstall economizer and ®lters.
7.Reconnect wiring.
8.Replace access panels.
CONDENSER COIL Ð Inspect coil monthly. Clean con- denser coil annually, and as required by location and outdoor- air conditions.
1.Turn off unit power.
2.Remove top panel screws on condenser end of unit.
3.Remove condenser coil corner post. See Fig. 37. To hold top panel open, place coil corner post between top panel and center post. See Fig. 38.
4.Remove screws securing coil to center post.
5.Remove fastener holding coil sections together at return end of condenser coil. Carefully separate the outer coil section 3 to 4 in. from the inner coil section. See Fig. 39.
6.Use a water hose or other suitable equipment to ¯ush down between the 2 coil sections to remove dirt and debris. Clean the outer surfaces with a stiff brush in the normal manner.
7.Secure inner and outer coil rows together with a ®eld- supplied fastener.
8.Reposition the outer coil section and remove the coil cor- ner post from between the top panel and center post.
9.Reinstall the coil corner post and replace all screws.
CONDENSATE DRAIN Ð Check and clean each year at start of cooling season. In winter, keep drain dry or protect against
FILTERS Ð Clean or replace at start of each heating and cooling season, or more often if operating conditions require it. Replacement ®lters must be same dimensions as original ®lters.
Lubrication
COMPRESSORS Ð Each compressor is charged with the correct amount of oil at the factory.
Fig. 37 Ð Cleaning Condenser Coil
Fig. 38 Ð Propping Up Top Panel
Fig. 39 Ð Separating Coil Sections
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