CARE AND MAINTENANMCE
To ensure continuing high performance and to minimize the possibility of premature equipment failure, periodic mainte- nance must be performed on this equipment. This combina- tion heating/cooling unit should be inspected at least once each year by a quali®ed service person.
NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.
WARNING: The ability to properly perform mainte- nance on this equipment requires certain expertise, me- chanical skills, tools, and equipment. If you do not pos- sess these, do not attempt to perform any maintenance on this equipment other than those procedures recom- mended in the User's Manual. FAILURE TO HEED THIS WARNING COULD RESULT IN SERIOUS PER- SONAL INJURY AND POSSIBLE DAMAGE TO THIS EQUIPMENT.
The minimum maintenance requirements for this equipment are as follows:
1.Inspect air ®lter(s) each month. Clean or replace when necessary.
2.Inspect cooling coil, drain pan, and condensate drain each cooling season for cleanliness. Clean when necessary.
3.Inspect fan motor and wheel for cleanliness and check lubrication each heating and cooling season. Clean and lubricate (if required) when necessary.
4.Check electrical connections for tightness and controls for proper operation each heating and cooling season. Service when necessary.
5.Check and inspect heating section before each heating season. Clean and adjust when necessary.
6.Check and clean vent screen if needed.
WARNING: Failure to follow these warnings could re- sult in serious personal injury:
1.Turn off gas supply, then turn off electrical power to the unit before performing any maintenance or service on the unit.
2.Use extreme caution when removing panels and parts. As with any mechanical equipment, per- sonal injury can result from sharp edges, etc.
3.Never place anything combustible either on, or in contact with, the unit.
4.Should overheating occur, or the gas supply fail to shut off, shut off the external main manual gas valve to the unit, then shut off the electrical supply.
I.AIR FILTER
CAUTION: Never operate the unit without a suitble air ®lter in the
Inspect air ®lter(s) at least once each month and replace
When necessary, replace ®lters with the same dimensional size and type as originally provided.
SERVICE
CAUTION: When servicing unit, shut off all electri- cal power to unit to avoid shock hazard or injury from rotating parts.
I. CLEANING
Inspect unit interior at the beginning of each heating and cool- ing season and as operating conditions require.
A.Evaporator Coil
1.Turn unit power off. Remove evaporator coil access panel.
2.If economizer is installed, remove economizer by dis- connecting economizer plug and removing mounting screws. See Fig. 18 and 19. Refer to Accessory Econo- mizer Installation Instructions or Optional Economizer sections on pages 13 and 14 for further details.
3.Slide ®lters out of unit.
4.Clean coil using a commercial coil cleaner or dish- washer 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.
6.Reinstall economizer and ®lters.
7.Reconnect wiring.
8.Replace access panels.
B.Condenser Coil
Inspect coil monthly. Clean condenser coil annually, and as required by location and
Wash coil with commercial coil cleaner. It is not necessary to remove top panel.
NOTE: Save all screws removed in this section. The screws must be used when reinstalling the equipment.
1.Turn off unit power.
2.Remove top panel screws on condenser end of unit.
3.Remove condenser coil corner post. See Fig. 35. To hold top panel open, place coil corner post between top panel and center post. See Fig. 36.
4.Remove screws securing coil to center post.
5.Remove fastener holding coil sections together at re- turn end of condenser coil. Carefully separate the outer coil section 3 to 4 in. from the inner coil section. See Fig. 37.
6.Use a water hose or other suitable equipment to ¯ush down between the 2 coil sections to remove dirt and de- bris. 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.
C. Condensate Drain
Check and clean each year at start of cooling season. In win- ter, keep drain dry or protect against
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