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INSPECTION AND CLEANING OF BURNER
ASSEMBLY/HEAT EXCHANGERS/FLUE GAS
PASSAGES
For Qualified Service Technician Only
See FIGURE 18, FIGURE 19 and FIGURE 20for 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 cover.
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, in-
cluding gaskets. See FIGURE 19.
9. Hold the burner assembly vertically and lightly tap it against a
wood block. Clean also with astiff brush. Severe cases of lint
clogging may require washing the burners in hot water.
10. Remove turbulators and clean with small brush. Reinspect
after cleaning and replace turbulators if defective.
11. Clean flue gas passages by using small brushes and a vac-
uum 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 ex-
changer if defective.
12. Reinstall parts and gaskets in reverse order. On spark to pi-
lot models check the spark gap. 1/8inch is required between
the igniter and pilot hood.
13. Turn gas on and check for leaks.
14. Install all access panels, turn power on and check for nor-
mal operation.
FIGURE 18 Access to Burners
I Burners, Valve, and Burner Box I
FIGURE 19 Removed
FIGURE 20 Burner Assembly Removed
Gas Valve
16
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