Lennox International Inc Elite Series Gas Furnace, EL296UHE Service, Blower, Filters

Service

WARNING

ELECTRICAL SHOCK, FIRE,

OR EXPLOSION HAZARD.

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.

Improper servicing could result in dangerous opera­ tion, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace.

When servicing controls, label all wires prior to dis­ connecting. Take care to reconnect wires correctly. Verify proper operation after servicing.

At the beginning of each heating season, system should be checked as follows by a qualified service technician:

Blower

Check the blower wheel for debris and clean if necessary. The blower motors are prelubricated for extended bearing life. No further lubrication is needed.

WARNING

The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inju­ ry or death.

Filters

All air filters are installed external to the unit. Filters should be inspected monthly. Clean or replace the filters when necessary to ensure proper furnace operation. Table 1 lists recommended filter sizes.

Exhaust and air intake pipes

Check the exhaust and air intake pipes and all connections for tightness and to make sure there is no blockage.

NOTE - After any heavy snow, ice or frozen fog event the furnace vent pipes may become restricted. Always check the vent system and remove any snow or ice that may be obstructing the plastic intake or exhaust pipes.

Electrical

1 - Check all wiring for loose connections.

2 - Check for the correct voltage at the furnace (furnace

operating).

3 - Check amp-draw on the blower motor.

Motor Nameplate__________Actual__________

Winterizing and Condensate Trap Care 1 - Turn off power to the furnace.

2 - Have a shallow pan ready to empty condensate water.

3 - Remove the clean out cap from the condensate trap and empty water. Inspect the trap then reinstall the clean out cap.

Cleaning The Burner Assembly

If cleaning the burner assembly becomes necessary, fol­ low the steps below:

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.

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