Lennox EL195UHE Unit Information page 49

Cleaning the Burner Assembly (if needed)
1 − Turn off electrical and gas power supplies to furnace.
Remove upper and lower furnace access panels.
2 − Disconnect the wires from the gas valve.
3 − Remove the burner box cover (if equipped).
4 − Disconnect the gas supply line from the gas valve. Re-
move gas valve/manifold assembly.
5 − Mark and disconnect sensor wire from the sensor. Dis-
connect wires from flame rollout switches.
6 − Disconnect combustion air intake pipe. It may be nec-
essary to cut the existing pipe to remove burner box
assembly.
7 − Remove four screws which secure burner box assem-
bly to vest panel. Remove burner box from the unit.
8 − Use the soft brush attachment on a vacuum cleaner to
gently clean the face of the burners. Visually inspect
the inside of the burners and crossovers for any block-
age caused by foreign matter. Remove any blockage.
9 − Reinstall the burner box assembly using the existing
four screws. Make sure that the burners line up in the
center of the burner ports.
10 − Reconnect the sensor wire and reconnect the 2−pin
plug to the ignitor wiring harness. Reconnect wires to
flame rollout switches.
11 − Reinstall the gas valve manifold assembly. Reconnect
the gas supply line to the gas valve. Reinstall the burn-
er box cover.
12 − Reconnect wires to gas valve.
13 − Replace the blower compartment access panel.
14 − Refer to instruction on verifying gas and electrical con-
nections when re−establishing supplies.
15 − Follow lighting instructions to light and operate fur-
nace for 5 minutes to ensure that heat exchanger is
clean and dry and that furnace is operating properly.
16 − Replace heating compartment access panel.
Page 49