Cleaning The Burner Assembly - Lennox G61MPV Service Manual

Cleaning the Burner Assembly

1 − Turn off electrical and gas power supplies to furnace.
Remove upper and lower furnace access panels.
2 − Mark all gas valve wires and disconnect them from the
valve.
3 − Disconnect the gas supply line from the gas valve. Re-
move gas valve/manifold assembly.
4 − Mark and disconnect sensor wire from the sensor. Dis-
connect 2-pin plug from the ignitor at the burner box.
5 − Remove burner box cover and remove four screws
which secure burner box assembly to vest panel. Re-
move burner box from the unit. G61MPV−135 only −
Remove and discard two additional shipping screws.
See figure 50.
6 − 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.
7 − Reconnect the sensor wire and reconnect the 2−pin
plug to the ignitor wiring harness.
8 − Reinstall the burner box assembly using the existing
four screws. Make sure that the burners line up in the
center of the burner ports.
9 − Reinstall the gas valve manifold assembly. Reconnect
the gas supply line to the gas valve. Reinstall the burn-
er box cover.
10 − Reconnect the gas valve wires to the gas valve.
11 − Replace the blower compartment access panel.
12 − Refer to instruction on verifying gas and electrical con-
nections when re−establishing supplies.
13 − 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.
14 − Replace heating compartment access panel.
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