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Indoor Coil Access Panel
Fig. 2 — Typical Access Panel Locations
(size 16 units)
Control Box
Access Panel
Fig. 3 — Blower Access Panel Location
(size 8-14 units)
Flue
Hood
Fig. 4 — Blower Access Panel Location
(size 16 units)
Filter Access Panel
Indoor
Access
Panel
Blower
Access Panels
Control Box
Access Panel
3
Routine Maintenance
These items should be part of a routine maintenance program, to
be checked every month or two, until a specific schedule for each
can be identified for this installation:
QUARTERLY INSPECTION (AND 30 DAYS AFTER
INITIAL START)
•
Return air filter replacement
•
Outdoor hood inlet filters cleaned
•
Condenser coil cleanliness checked
•
Condensate drain checked
SEASONAL MAINTENANCE
These items should be checked at the beginning of each season (or
more often if local conditions and usage patterns dictate):
Air Conditioning
•
Ensure outdoor fan motor mounting bolts are tight
•
Ensure compressor mounting bolts are tight
•
Inspect outdoor fan blade positioning
•
Ensure control box is clean
•
Check control box wiring condition
•
Ensure wire terminals are tight
•
Check refrigerant charge level
•
Ensure indoor coils are clean
•
Check supply blower motor amperage
Electric Heating
•
Inspect power wire connections
•
Ensure fuses are operational
•
Ensure manual reset limit switch is closed
Economizer or Outside Air Damper
•
Check inlet filters condition
•
Check damper travel (economizer)
•
Check gear and dampers for debris and dirt
Air Filters and Screens
Each unit is equipped with return air filters. If the unit has an econ-
omizer, it will also have an outside air screen. If a manual outside
air damper is added, an inlet air screen will also be present.
Each of these filters and screens will need to be periodically
replaced or cleaned.
Filters
RETURN AIR FILTERS
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this CAUTION can result in premature
wear and damage to equipment.
DO NOT OPERATE THE UNIT WITHOUT THE RETURN
AIR FILTERS IN PLACE.
Dirt and debris can collect on heat exchangers and coils
possibly resulting in a small fire. Dirt buildup on components
can cause excessive current used resulting in motor failure.
Return air filters are disposable fiberglass media type. Access
to the filters is through the small lift-out panel located on the
rear side of the unit, above the evaporator/return air access
panel. (See Fig. 5.)
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Troubleshooting
