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BLOWER
Check and clean blower wheel for any debris. Blower
motor is prelubricated for extended bearing life. No furĆ
ther lubrication is needed.
PILOT AND BURNER FLAME
CAUTION
Check pilot flame and burner flame periodically
to ensure proper operation.
1-
Pilot Flame
-- Pilot flame must surround the end of
flame sensor for proper operation of pilot safety cirĆ
cuit. See figure 7.
2-
Burner Flame
-- Start burner and allow to operate
for a few minutes to establish normal burning condiĆ
tions. Check burner flame by observation. Flame
should be predominantly blue in color, strong in apĆ
pearance and should rise directly from the burner
ports in the heat exchanger. Check to see that flame
is burning from all continuous ribbon ports and that
flame does not impinge on the sides of the heat exĆ
changer. See figure 8.
PILOT FLAME
(Side View)
BURNER
PILOT GAS
LINE
ELECTRODE
FIGURE 7
FLAME SENSOR
BURNER FLAME
FIGURE 8
NOTE-VIEW BURNER FLAME
THROUGH OBSERVATION PORT ON BURNER
BOX OR DAMPER OPENING (Not Shown)
VENTING SYSTEM INSPECTION
Annually (before heating season) inspect furnace ventĆ
ing system, draft hood, vent cap, heat exchanger, burnĆ
ers and pilot for corrosion, deterioration, or deposits of
debris. Remove any obstructions.
Contact your Lennox dealer for a periodic unit inspection
by a qualified service technician.
BLOCKED VENT SHUT-OFF SYSTEM
Your Lennox furnace is equipped with a blocked vent
shut-off switch and a flame roll-out safety switch. The
blocked vent shut-off switch shuts off the gas supply to
the furnace in the event of flue or vent blockage. The
flame roll-out safety switch shuts off the gas supply to the
furnace if there is a blockage of the heat exchanger. If the
furnace fails to operate due to the functioning of either of
these safety switches, DO NOT attempt to place the furĆ
nace into operation. Contact a qualified service person.
SERVICE REMINDER
Call your Lennox service technician if unit is inoperative.
Before calling, always check the following to be sure serĆ
vice is required.
1- Check that electrical disconnect switches are
ON.
2- Check room thermostat for proper setting.
3- Replace any blown fuses or reset circuit breakers.
4- Gas valve should be
ON
.
5- Air filter should not be plugged limiting air flow.
6- Is gas turned on at meter?
7- Is manual main shut-off valve open?
PLANNED SERVICE
To keep your Lennox gas heating system in peak operatĆ
ing condition year after year, contact your independent
Lennox dealer about a planned service program.
