Page 44
Cleaning the Burner
NOTE - Use papers or protective covering in front of the
furnace during cleaning.
1 - Turn o both electrical and gas power supplies to
furnace.
2 - Label the wires from gas valve, thermal switch,
primary limit switch and make-up box then
disconnect them.
3 - Disconnect gas supply piping. Remove the screws
securing the air fuel plenum to the vestibule panel
and remove the air intake assembly (can stay
intact) / air fuel plenum assembly from the unit.
The air intake assembly and air fuel plenum can be
removed as one component.
4 - To clean burner and intake debris screen, run a
vacuum cleaner over the face of burners. Visually
inspect inside the burner. Remove any blockage.
5 - Reinstall air fuel plenum / air intake assembly
6 - Re-install gas supply and turn on electrical power
to furnace.
FIGURE 29
Air Gas Plenum
Burner
Gasket
(replace)
Burner Removal For Cleaning Or Replacement
ir Intake Assembly
Gas Valve
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