Page 5
DOWNFLOW FURNACE
FILTERS IN PLENUM RACK
FIGURE 5
Blower
Check and clean blower wheel for any debris. Blower mo-
tor is prelubricated for extended bearing life. No further lu-
brication is needed.
WARNING
Blower door must be securely in place when blower
and burners are operating. Gas fumes, which could
contain carbon monoxide, can be drawn into living
space resulting in personal injury or death.
Burner Flame
The G29M burner flame is not adjustable; however, the
flame should be inspected at the beginning of each heat-
ing season and burners should be cleaned, if necessary.
Burner flame should be blue when burning natural gas.
BURNER FLAME
BURNER
FLAME
HEAT
EXCHANGER
TUBE
VEST
PANEL
FLAME APPEARS BLUE IF
BURNING NAT. GAS.
FIGURE 6
Venting System Inspection
Annually (before heating season) inspect furnace venting
system, vent cap, heat exchanger and burners for corro-
sion, deterioration, or deposits of debris. Remove any ob-
structions.
Contact your Lennox dealer for a periodic unit inspection
by a qualified service technician.
Flame Rollout Safety Switches
Your Lennox furnace is equipped with two flame roll-out
safety switches which shut off the gas supply to the fur-
nace in case of heat exchanger blockage. If the furnace
fails to operate due to the functioning of these safety
switches, DO NOT attempt to place the furnace into op-
eration. Contact a qualified service technician.
Service Reminder
Call your Lennox service technician if unit is inoperative.
Before calling, always check the following to be sure ser-
vice is required.
1 - Check that electrical disconnect switches are ON.
2 - Are access panels securely in place?
3 - Check room thermostat for proper setting.
4 - Replace any blown fuses or reset circuit breakers.
5 - Gas valve should be ON.
6 - Air filter should not be plugged limiting air flow.
7 - Is gas turned on at meter?
8 - Is manual main shut-off valve open?
To keep your Lennox gas heating system in peak op-
erating condition year after year, contact your inde-
pendent Lennox dealer about a planned service pro-
gram.
Safety Precautions
If you discover any of the following, shut down your
unit, and contact an independent Lennox dealer for
an inspection by a qualified technician.
:
If you repeatedly hear any new or unfamiliar sounds
while your unit is operating, there may be a problem.
For example, poorly performing burners can produce
unfamiliar noises.
:
If you smell any unusual odors, your unit may be oper-
ating improperly. For example, units can give off unfa-
miliar odors if components are required to operate in
abnormal conditions.
:
Look for visible signs of a malfunctioning unit. Exam-
ples include unusual amounts of condensate on win-
dows inside your house, visibly burnt components or
unusual dirt or rust accumulations on the vent pipe or
in the unit.
:
If you experience headache, nausea, fatigue, or dizzi-
ness, the cause could be exposure to carbon monox-
ide gas. This is often misdiagnosed as the flu because
symptoms are similar. If you suffer from flu-like symp-
toms that are exaggerated at home, but seem to sub-
side while you are away from the house, exposure to
carbon monoxide could be the cause.
Your vigilance may pay off in early detection of a problem
before either personal injury or property damage occurs.
Do not hesitate to contact a qualified service technician as
an investment in your well being.
