Installation guide

Condenser Fan Motor
Note: The condenser fan motor is permanently lubricated.
No further lubrication is required. Do not attempt to
lubricate the condenser fan motor.
VENT ASSEMBLY
BURN HAZARD.
Failure to follow this caution may result in personal
injury.
Flue cover may be hot! Allow adequate time for flue
cover to cool.
Clean the surrounding area and the condenser and
evaporator coils. Use caution to avoid damage to coil fins.
BLOWER MOTOR ACCESS
Refer to Figure 16 for a view of blower motor and
compartment.
1. Remove the blower access panel
2. Remove the three screws securing the blower motor
housing. If unit has a support bracket, remove the two
screws securing the bracket.
3. Remove the two red wires attached to the limit switch.
Motor removal and replacement
This method is required to replace or repair blower wheel,
blower housing, or any unreachable components behind
blower assembly.
1. Remove all screws around rim of unit top, (except
screws which are inaccessible because of proximity to
structure).
2. Raise unit top at corner of unit closest to blower at least
2" and place a sturdy brace at least 2" thick between top
and unit corner. A 2X4 piece of wood is ideal for this.
3. Disconnect all wires from housing and slide housing out
of unit. Reverse this process to reinstall.
Circulating Air Blower
Visually inspect the blower wheel for accumulations of dirt
or lint. Clean the compartment and the blower wheel. If
accumulation is excessive on blower wheel, or does not
easily remove, it will be necessary to remove the blower
assembly.
Note: The blower motor is permanently lubricated. No
further lubrication is required. Do not attempt to lubricate
the blower motor.
Burners / Heat Exchangers / Flue Gas Passages
To inspect the burners, heat exchanger and interior flue gas
passages, use a light and small mirror on an extension
handle.
Check the exterior of the heat exchanger and the interior
flue gas passages for any evidence of deterioration due to
corrosion, cracking or other causes. If signs of scaling or
sooting exist, remove the burners and clean the heat
exchanger, as required.
INSPECTION AND CLEANING OF BURNER
ASSEMBLY/HEAT EXCHANGERS/FLUE GAS
PASSAGES
For Qualified Service Technician Only
See Figure 19 for identification of parts.
1. Disconnect electrical power to unit.
2. Turn OFF gas at manual shut off valve.
3. Remove burner access panel.
4. Remove the vent assembly flue pipe.
5. Disconnect gas pipe at union.
6. Disconnect wires from gas valve, note connections.
7. Remove screws that secure the flame shield and
remove gas control valve, manifold and burners as an
assembly.
8. Remove collector box, injector plate, and restrictor
plate, including gaskets.
9. Hold the burner assembly vertically and lightly tap it
against a wood block. Clean also with a stiff brush.
Severe cases of lint clogging may require washing the
burners in hot water.
10. Clean flue gas passages by using small brushes and a
vacuum cleaner. It may be necessary to fabricate
handle extensions for the brushes to reach the areas
that require cleaning. Reinspect after cleaning and
replace the heat exchanger if defective.
11. Reinstall parts and gaskets in reverse order. On direct
spark models check the spark gap. 1/8 inch is required
between the sparker electrodes.
12. Turn gas on and check for leaks.
13. Install all access panels, turn power on and check for
normal operation.
REFRIGERANT CIRCUIT
For Qualified Service Technician Only
Annually inspect all refrigerant tubing connections and the
unit base for oil accumulations. Detecting oil generally
indicates a refrigerant leak.
FIRE AND EXPLOSION HAZARD.
Failure to follow this warning could result in personal
injury, death and/or property damage.
System under pressure. Relieve pressure and recover
all refrigerant before system repair or final unit
disposal to avoid serious injury or death. Use all
service ports and open all flow control devices,
including solenoid valves.
If oil is detected or if low cooling performance issuspected,
leak-test all refrigerant tubing using an electronic leak
detector, halide torch, or liquid-soap solution,
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