507582-04
Page 52 of 54
Issue 2220
Service
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 operation,
serious injury, death, or property damage.
Before servicing, disconnect all electrical power to
furnace.
When servicing controls, label all wires prior to
disconnecting. Take care to reconnect wires correctly.
Verify proper operation after servicing.
WARNING
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 pre-lubricated for extended bearing
life. No further lubrication is needed.
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 injury or death.
WARNING
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 3 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). Correct voltage is 120 VAC ± 10%.
3. Check amp-draw on the blower motor with the blower
compartment access panel in place.
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
1.
Turn off electrical and gas power supplies to furnace.
Remove upper and lower furnace access panels.
2. Disconnect from the gas valve.
3.
Remove the burner box cover.
4. Disconnect the gas supply line from the gas valve.
Remove gas valve/manifold assembly.
5. Mark and disconnect sensor wire from the sensor.
Disconnect 2 pin plug from the ignitor at the burner
box.
6.
Remove four screws which secure burner box
assembly to vest panel. Remove burner box from the
unit.
7. Gently clean the face of the burners using the soft
brush attachment on a vacuum cleaner. Visually
inspect the inside of the burners and crossovers for
any blockage caused by foreign matter. Remove any
blockage and inspect for damage. Replace if damage
by rust or foreign matter cannot be removed.
8. Reconnect the sensor wire and reconnect the 2 pin
plug to the ignitor wiring harness.
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. Reinstall the gas valve manifold assembly. Reconnect
the gas supply line to the gas valve. Reinstall the
burner box cover.
11. Reconnect wires to gas valve.
12. Replace the blower compartment access panel.
13. Refer to instruction on verifying gas and electrical
connections when re-establishing supplies.
14. Follow lighting instructions to light and operate furnace
for 5 minutes to ensure that heat exchanger is clean
and dry and that furnace is operating properly.
15. Replace heating compartment access panel.
