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.
Oil the blower motor, if applicable, by adding 1/2teaspoonful
(lcc) of SAE 10W30 to each motor bearing. The blower
motor should be oiled after five years of operation and every
five years thereafter.
CAUTION
Do not use 3 in 1 oil, penetrating oil, WD40 or similar
oils to oil motor bearings.
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 16 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 re-
move 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. Se-
vere 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 han-
dle 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 spark
to pilot models check the spark gap. 1/8inch is required
between the igniter and pilot hood.
12. Turn gas on and check for leaks.
13. Install all access panels, turn power on and check for
normal operation.
462 01 1003 01
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