J801X Installation Manual

22
may have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Cleaning of Burners - If the burners must be cleaned, follow
steps 1 - 12. See Figure 21, (page 30) for component
location.
1. Shut off gas supply to the furnace at the meter or at a
manual valve in the supply piping.
2. Turn off all power to the furnace and set the thermostat
to its lowest setting.
3. Remove the burner door from the furnace.
4. Turn the gas control switch to the OFF position.
5. Disconnect the wires from the gas valve, igniter, flame
sensor, and flame rollout switch.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
6. Using two wrenches, separate the ground-joint union in
the gas supply piping at the furnace.
7. Remove the piping between the gas valve and the ground-
joint union. (If applicable).
8. Remove all screws securing the burner assembly to the
furnace.
9. Carefully remove the burner assembly from the furnace.
DO NOT DAMAGE THE IGNITER WHILE REMOVING
THE BURNER ASSEMBLY.
10. Inspect the burners for accumulated dust or debris. If
necessary carefully clean them with a soft wire brush and
a vacuum cleaner. DO NOT DAMAGE THE IGNITER
WHILE CLEANING THE BURNER.
11. Replace all the parts in reverse order that they were
removed.
12. Follow the lighting instructions found on the furnace door
to return the furnace to operation. Verify proper operation
after servicing.
Cleaning of Flue Passages - If the flue passages must be
cleaned, follow the steps below. See Figure 21, (page 30)
for component location.
1. Shut off the gas supply to the furnace at the meter or at
the manual valve in the gas supply piping.
2. Turn off all power to the furnace and set the thermostat
to the lowest temperature setting.
3. Remove the blower door from the furnace.
4. Turn the gas control switch to the OFF position.
5. Disconnect the wires from the gas valve, flame sensor,
inducer, flame roll-out switch, limit switch, pressure switch
and igniter.
6. Remove the silicone rubber tube from the inducer.
7. Using two wrenches, separate the ground-joint union in
the gas supply piping at the furnace.
8. Remove the piping between the gas valve and the ground-
joint union. (If applicable).
9. Remove all screws securing the burner assembly to the
furnace.
10. Carefully remove the burner assembly from the furnace.
DO NOT DAMAGE THE IGNITER WHILE REMOVING
THE BURNER ASSEMBLY.
11. J801X*U models - Remove all screws securing the inducer
assembly to the vent pipe running out of the furnace
J801X*D models - Remove all screws securing the
combustion air tube assembly to the vent pipe running
out of the furnace.
12. Remove all screws securing the inducer assembly to the
collector pan.
13. J801X*U models - Carefully remove the inducer assembly
from the furnace.
J801X*D models - Carefully remove the inducer assembly
and combustion tube assembly from the furnace. DO
NOT BREAK THE SEALS AT EACH END OF THE
COMBUSTION AIR TUBE.
14. Remove all screws securing the collector pan to the
furnace.
15. Remove the collector pan and gasket from the furnace.
16. Attach a round wire brush to a length of high grade stainless
steel cable. Attach the other end of the cable to a variable
speed reversible drill. Slowly insert and rotate the cable
into the top portion of the heat exchanger. Operate the
drill alternating between forward and reverse, working
the cable in and out several times to obtain sufficient
cleaning. Repeat this sequence for each heat exchanger
tube.
17. Remove all loosened debris from the heat exchanger
tubes using a vacuum cleaner.
18. Using a bright light, check the condition of the upper and
lower sections of the heat exchanger tubes.
19. Inspect the burners for accumulated dust or debris. If
burners must be cleaned, see page 22.
20. Replace all the parts in reverse order that they were
removed.
21. Check gaskets for damage and replace if needed.
22. Follow the lighting instructions found on the furnace door
to return the furnace to operation. Verify proper operation
after servicing.
Vent System - Check the vent pipe and/or chimney for
corrosion or debris. Any corroded section of vent pipe must be
replaced, and any obstruction or blockage must be removed
prior to operating the furnace.
WARNING:
Holes in the vent pipe or heat exchanger can
cause combustion products to enter the home.
Replace the vent pipe or heat exchanger if leaks
are found. Failure to prevent the circulation of
combustion products into the living space can
create potentially hazardous conditions including
carbon monoxide poisoning that could result in
personal injury or death.
Heat Exchanger & Burner Maintenance - The furnace
should operate for many years without soot buildup in the
flue passageways, however, the flue, vent system, and
burners should be inspected and cleaned (if required) by a
qualified service technician annually to ensure continued safe
operation. Pay attention to any deterioration from corrosion
or other sources.
Lubrication - The bearings in the blower motor and inducer
blower used in these furnaces are pre-lubricated and sealed
by the manufacturer. No further oiling of the bearings is
required for the life of the motor.