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8. Partially slide the burner rack out of the unit (see Fig. 25
and 26). Remove ignitor and sensor wires at the burner as-
sembly. Remove wires to rollout switch.
9. Slide the burner rack out of the unit (See Fig. 25 and 26).
10. To reinstall, reverse the procedure outlined a bove.
Compressor
Access Panel
Blower
Access
Panel
Control
Access
Panel
A09479
Fig. 24 -- Unit Access Panels
Integrated
Gas Unit
Controller
(IGC)
Induced Draft
Motor
Rollout
Switch
Mounting
Screw
Burner
Rack
Inducer
Blower
Housing
Flue
Collector
Box
Interface Fan
Board (IFB)
Auto Transformer
fuses used on 460
volt units only.
(Hidden)
Fan Partition
Mounting
Bracket
A09480
Fig. 25 -- Blower Housing and Flue Collector Box
A07680
Fig. 26 -- Burner Rack Removed
Inducer Pressure Switch
Inspect pressure switch connections. Inspect pressure switch tube
for cracks or restrictions. Replace if needed.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect and install lockout tag on electrical power to the
unit before cleaning and lubricating the blower motor and
wheel.
!
WARNING
Outdoor Coil, Indoor Coil, and Condensate
Drain Pan
Inspect the condenser coil, evaporator coil, and condensate drain
pan at l east once each year.
The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions, including weeds and shrubs, that interfere with the
airflow through the condenser coil. Straighten bent fins with a fin
comb. If coated with dirt or lint, clean the coils with a vacuum
cleaner, using the soft brush attachment. Be careful not to bend the
fins. If coated with oil or grease, clean the coils with a mild
detergent a nd water solution. Rinse coils with clear water, using a
garden hose. Be careful not to splash water on motors, insulation,
wiring, or air f ilter(s). For best results, spray condenser coil fins
from inside to outside the unit. On units with an outer and inner
condenser coil, be sure to clean between the coils. Be sure to flush
all dirt and debris from the unit base.
Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring, or
air filter(s). If the drain trough is restricted, clear it with a
“plumbers snake” or similar probe device.
Outdoor Fan
UNIT OPERATION HAZARD
Failure to follow this caution may result in damage to unit
components.
Keep the outdoor fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of the
unit.
CAUTION
!
1. Remove 4 screws holding outdoor grille and motor to top
cover.
2. Turn motor/grille assembly up side do wn on top cover to
expose fan blade.
3. Inspect the fan bl ades for cracks or bends.
4. If fan needs to be remove d, loos en setscrew and slide fan off
motor shaft.
5. When replacing fan blade, position blade according to the
table shown in Fig. 27.
6. Ensure that set screw engages the flat area on the motor
shaft when tightening.
7. Replace grille.
Electri cal Con trols and Wiring
Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical pow er to the unit.
Remove access panel to locate a ll the electrical controls and wiring.
Check all electrical connections for tightness. Tighten all screw
connections. If any smoky or burned connections are noticed,
disassemble the connection, clean all the parts, re--strip the wire
end and reassemble the connection properly and securely.
577D-- -- A