5
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 assem-
blyonblowershelf.
13. Reconnect wires.
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.
!
WARNING
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 be-
tween 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 pan-
el 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
component damage.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation.
CAUTION
!
5. Remove wires from gas valve. Note location for reassemb-
ly .
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.
MANIFOLD
MOUNTING
SCREWS
MANIFOLD
GAS VALVE
REGULATOR
FITTING
GAS
CONTROL
VALVE
CELL
PANEL
GASKET
A02312
Fig. 6 --- Burner Box Assembly
IGNIT ER WIRES MUST
BE PLACED IN THIS SLOT
A05074
Fig. 7 --- Igniter Wire Placement
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 grom-
met, dressing the wires to ensure there is no tension on the
igniter itself. (See Fig. 7.)
355BAV
To Next Page
Loading...
Need help?
General