Page 35
Cleaning the Burners
NOTE -
Use papers or protective covering in front of the
furnace during cleaning.
1 - Turn off both electrical and gas power supplies to
furnace.
2 - Label the wires from gas valve, rollout switches,
primary limit switch and make-up box then
disconnect them.
3 - Disconnect gas supply piping. Remove the screw
securing the burner box cover and remove cover.
Remove the four screws securing the burner
manifold assembly to the vestibule panel and
remove the assembly from the unit.
4 - To clean burners, run a vacuum cleaner with a soft
brush attachment over the face of burners. Visually
inspect inside the burners and crossovers for any
blockage caused by foreign matter. Remove any
blockage. Figure 33 shows burner detail.
5 - Reinstall burner box, manifold assembly and burner
box cover.
6 - Re-install gas supply and turn on electrical pwer to
furnace.
BURNER REMOVAL
Manifold And Gas Valve
Retention Rings
Cross Over
Ignitor
Sensor
Rollout
Switches
FIGURE 33
