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3
Quarterly Inspection (and 30 days after initial start)
S
Return air filter replacement
S
Outdoor hood inlet filters cleaned
S
Belt tension checked
S
Belt condition checked
S
Pulley alignment checked
S
Fan shaft bearing locking collar tightness checked
S
Condenser coil cleanliness checked
S
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
S
Condenser fan motor mounting bolts tightness
S
Compressor mounting bolts
S
Condenser fan blade positioning
S
Control box cleanliness and wiring condition
S
Wire terminal tightness
S
Refrigerant charge level
S
Evaporator coil cleaning
S
Evaporator blower motor amperage
Heating
S
Heat exchanger flue passageways cleanliness
S
Gas burner condition
S
Gas manifold pressure
S
Heating temperature rise
Economizer or Outside Air Damper
S
Inlet filters condition
S
Check damper travel (economizer)
S
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 economizer, 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.
Return Air Filters
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. 1.)
To remove the filters:
1. Grasp the bottom flange of the upper panel.
2. Lift up and swing the bottom out until the panel dis-
engages and pulls out.
3. Reach inside and extract the filters from the filter
rack.
4. Replace these filters as required with similar replace-
ment filters of same size.
To re--install the access panel:
1. Slide the top of the panel up under the unit top panel.
2. Slide the bottom into the side channels.
3. Push the bottom flange down until it contacts the top
of the lower panel (or economizer top).
IMPORTANT
: DO NOT OPERATE THE UNIT
WITHOUT THESE FILTERS!
Outside Air Hood
Outside
air
hood
inlet
screens
are
permanent
aluminum--mesh type filters. Check these for cleanliness.
Remove the screens when cleaning is required. Clean by
washing with hot low--pressure water and soft detergent
and replace all screens before restarting the unit. Observe
the flow direction arrows on the side of each filter frame.
Economizer Inlet Air Screen
This air screen is retained by spring clips under the top
edge of the hood. (See Fig. 3.)
DIVIDER
BAROMETRIC
RELIEF
CLEANABLE
ALUMINUM
FILTER
FILTER
HOOD
FILTER
CLIP
OUTSIDE
AIR
C08634
Fig. 3 -- Filter Installation
To remove the filter, open the spring clips. Re--install the
filter by placing the frame in its track, then closing the
spring clips.
48L
C
Summary of Contents for 48LC 05
Page 10: ...10 COOLING CHARGING CHARTS C14037 Fig 13 Cooling Charging Charts 3 Ton 48LC ...
Page 11: ...11 COOLING CHARGING CHARTS cont C14038 Fig 14 Cooling Charging Charts 4 Ton 48LC ...
Page 12: ...12 COOLING CHARGING CHARTS cont C14039 Fig 15 Cooling Charging Charts 5 Ton 48LC ...
Page 35: ...35 WIRING DIAGRAMS C14043 Fig 44 Unit Wiring Diagram Power 208 230V 460V 3 Phase 48LC ...
Page 36: ...36 C14044 Fig 45 Unit Wiring Diagram Power 575V 3 Phase 48LC ...
Page 37: ...37 C14045 Fig 46 Unit Wiring Diagram Control 48LC ...
Page 47: ...47 48LC ...