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IGNITOR
SPARK GAP
SHOULD BE 1/8"
(3mm)
FIGURE 19
WARNING
Danger of explosion. Can cause injury
or death. Do not overtighten main burner
mounting screws. Snug tighten only
6 - Replace burners and screws securing burner. See
figure 20.
7 - Replace access panel.
8 - Restore electrical power and gas supply. Follow
lighting instructions attached to unit and use
inspection port in access panel to check flame.
BURNER ORIENTATION
150,000 BTUH - 7 BURNERS
SENSOR
108,000 BTUH - 5 BURNERS
SENSOR
65,000 BTUH - 3 BURNERS
SENSOR IGNITOR
FIGURE 20
D-Combustion Air Inducer
A combustion air proving switch checks combustion air in-
ducer operation before allowing power to the gas control-
ler. Gas controller will not operate if inducer is obstructed.
IGNITOR
IGNITOR
Page 44
Under normal operating conditions, the combustion air
inducer wheel should be checked and cleaned prior to
the heating season. However, it should be examined pe-
riodically during the heating season to establish an ideal
cleaning schedule.
Clean combustion air inducer as follows:
1 - Shut off power supply and gas to unit.
2 - Remove the access panel located on the right side
of the outdoor section under the control box.
3 - Remove and retain screws securing combustion air
inducer to flue box. Remove vent connector. See
figure 11.
4 - Clean inducer wheel blades with a small brush and
wipe off any dust from housing. Take care not to
damage exposed fan blades. Clean accumulated
dust from front of flue box cover.
5 - Return combustion air inducer motor and vent
connector to original location and secure with
retained screws. It is recommended that gaskets be
replaced during reassembly.
6 - Replace the access panel.
7 - Clean combustion air inlet louvers on heat access
panel using a small brush.
E-Flue Passageway and Flue Box
Remove flue box cover only when necessary for equip-
ment repair. Clean inside of flue box cover and heat ex-
changer tubes with a wire brush when flue box cover has
to be removed. Install a new flue box cover gasket and
replace cover. Make sure edges around flue box cover are
tightly sealed.
F-Evaporator Coil
Inspect and clean coil at beginning of each cooling season.
Clean using mild detergent or commercial coil cleanser.
Flush coil and condensate drain with water taking care not
to get insulation, filters and return air ducts wet.
G-Condenser Coil
Clean condenser coil annually with water and inspect
monthly during the cooling season.
Note - Do not use commercial coil cleaner on the all alu-
minum coil. Using anything other than water could result
in corrosion and/or leaks.
Clean the all-aluminum coil by spraying the coil steadily
and uniformly from top to bottom. Do not exceed 900 psi
or a 45 degree angle; nozzle must be at least 12 inches
from the coil face. Take care not to fracture the braze be-
tween the fins and refrigerant tubes. Reduce pressure and
work cautiously to prevent damage.
H-Supply Blower Wheel
Annually inspect supply air blower wheel for accumulated
dirt or dust. Turn off power before attempting to remove
access panel or to clean blower wheel.
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