c. Connect field drain to condensate trap.
NOTE: Ensure tubes are not kinked or pinched, as this will affect
operation.
12. Reinstall control box, transformer, and door switch assembly
on blower shelf.
13. Reconnect wires.
a. Refer to furnace wiring diagram and connect thermostat
leads if previously disconnected. (See Fig. 21.)
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in electrical shock,
personal injury, or death.
Blower access panel door switch opens 115-v power to
furnace control. No component operation can occur. Caution
must be taken when manually closing this switch for service
purposes.
14. Turn on electrical supply. Manually close blower access panel
door switch. Use a piece of tape to hold switch closed. Check
for proper rotation and speed changes between heating and
cooling by jumpering R to G and R to Y/Y2 on furnace control
thermostat terminals. (See Fig. 15.)
15. If furnace is operating properly, release blower access panel
door switch, replace blower access panel, and replace main
furnace door.
Step 3—Cleaning Burners
The following items should be performed by a qualified service
technician. If the burners develop an accumulation of light dirt or
dust, they may be cleaned by using the following procedure:
1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
3. Remove burner box cover.
4. Using backup wrench, disconnect gas supply pipe from
furnace gas control valve.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in furnace compo-
nent damage.
Label all wires prior to disconnection when servicing con-
trols. Wiring errors can cause improper and dangerous
operation.
5. Remove wires from gas valve. Note location for reassembly.
6. Remove burner box pressure tube from gas valve regulator
fitting.
7. Unplug igniter from harness.
8. Remove igniter leads from slot in manifold grommet.
9. Remove screws that secure manifold to burner box. (See Fig.
6.)
NOTE: Do not remove burner box from cell panel.
10. Remove manifold, orifices, and gas valve as 1 assembly.
11. Remove screws attaching burner assembly in burner box.
NOTE: Use care when removing and reinstalling burners not to
strike the hot surface igniter.
12. Remove burner assembly from burner box.
NOTE: All burners are attached to burner bracket and can be
removed as 1 assembly.
13. Clean burners with soft brush and vacuum.
14. Reinstall manifold, orifice, and gas valve assembly in burner
box. Ensure manifold seal grommet is installed properly and
burners fit over orifices.
15. Reinsert the igniter wires in the slot in the manifold grommet,
dressing the wires to ensure there is no tension on the igniter
itself. (See Fig. 7.)
Fig. 6—Burner Box Assembly
A02312
MANIFOLD
MOUNTING
SCREWS
MANIFOLD
GAS VALVE
REGULATOR
FITTING
GAS
CONTROL
VALVE
CELL
PANEL
GASKET
→ Fig. 7—Igniter Wire Placement
A05074
IGNIT ER WIRES MUST
BE PLACED IN THIS SLOT
5
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