3
Fig. 2 — Typical Access Panel Location (Rear)
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 INI-
TIAL START)
The 581J units should be inspected and serviced every three
months.
• Return air filter replacement
• Outdoor hood inlet filters cleaned
• Belt tension checked
• Belt condition checked
• Pulley alignment checked
• Fan shaft bearing locking collar tightness checked
• 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
• Condenser fan motor mounting bolts tightness
• Compressor mounting bolts
• Condenser fan blade positioning
• Control box cleanliness and wiring condition
• Wire terminal tightness
• Refrigerant charge level
• Evaporator coil cleaning
• Evaporator blower motor amperage
Heating
• Heat exchanger flue passageways cleanliness
• Gas burner condition
• Gas manifold pressure
• Heating temperature rise
Economizer or Outside Air Damper
• 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 re-
placed or cleaned.
Return Air Filters
Return air filters are disposable fiberglass media type. Access to
the filters is through the vertical panel to the right of the control
box. Filters are situated on slide-out racks for easy inspection and
repair. See Fig. 1.
Removing the Return Air Filters
1. Remove the return air filter and indoor coil access panel.
See Fig. 1.
2. Reach inside and remove the filters from the filter rack.
3. Replace the filters, as required, with similar replacement
filters of the same size.
4. Re-install the return air filter and indoor coil access panel.
Outdoor Air Hood
The outdoor air hood inlet screens are permanent aluminum-mesh
type filters. See Fig. 2. Inspect these screens for cleanliness. Re-
move the screens when cleaning is required. Clean by washing
with hot low-pressure water and soft detergent. Replace all screens
before restarting the unit. Observe the flow direction arrows on the
side of each screen frame.
Economizer Inlet Air Screen
The inlet air screen is retained by filter clips under the top edge of
the hood. See Fig. 3.
Remove screens by removing the screws in the horizontal clips on
the leading edge of the hood. Slide filters out. See Fig. 3.
Install filters, by sliding clean or new filters into the hood side re-
tainers. Once positioned, re-install the horizontal clips.
CONDENSER COIL
CIRCUIT A
CONDENSER COIL
CIRCUIT B
COMPRESSOR
CIRCUIT B
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 possi-
bly resulting in a small fire. Dirt buildup on components can
cause excessive current used resulting in motor failure.
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