Lennox G26 Series Guide

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PRODUCT LITERATURE
¤ 1996 Lennox Industries Inc.
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FIGURE 1
HEAT
EXCHANGER
ASSEMBLY
UPPER ACCESS
PANEL
BURNERS
BURNER
BOX
IGNITION
CONTROL
BLOWER MOTOR
GAS
MANIFOLD
FRESH AIR INTAKE
CONNECTION
CABINET
CONTROL BOX
GAS
VALVE
CONDENSATE
TRAP
COMBUSTION AIR
PROVING
(PRESSURE)
SWITCH
COMBUSTION AIR
BLOWER
BLOWER ACCESS
DOOR
DOOR INTERLOCK
SWITCH
EXHAUST PIPE
CONNECTION
TOP CAP
FLAME SIGHT
GLASS
BLOWER CONTROL
BOARD

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WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose
you to fiberglass wool. Breathing this may
cause lung cancer. (Fiberglass wool is known to
the State of California to cause cancer.)
Fiberglass wool may also cause respiratory,
skin, and eye irritation.
To reduce exposure to this substance or for fur-
ther information, consult material safety data
sheets available from address shown below, or
contact your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 7 5379--9900
WARNING
Do not set thermostat below 60 E F (16 E C) in heat-
ing mode. Setting thermostat below 60 E F (16 E C)
reduces the number of heating cycles. Damage
to the unit may occur that is not covered by the
warranty.
WARNING
If overheating occurs or if gas supply fails to shut
off, shut off the manual gas valve to the ap-
pliance before shutting off electrical supply.
WARNING
Do not use this furnace if any part has been
underwater. Immediately call a qualified service
technician to inspect the furnace and to replace
any part of the control system and any gas con-
trol which has been under water.
CAUTION
Before attempting to perform any service or
maintenance, turn the electrical power to unit
OFF at disconnect switch.
IMPORTANT
Any additions, changes, or conversions required
in order for the appliance to satisfactorily meet
the application needs must be made by a Lennox
service technician using factory specified and ap-
proved parts.
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Unit m ay be equipped with either a gas control knob
or lever. Use only your hand to push in or turn the gas
control knob or move the gas control lever. Never use
tools. If the knob will not push in or turn or if lever will
not move by hand, do not try to repair it, call a quali-
fied service technician. Force or attempted repair may
result in a fire or explosion.
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6-- On Honeywell VR8204 gas valves, turn knob on
gas valve clockwise to
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ers 36E gas valves, move switch to OFF . Do not
force. See figure 3.
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HONEYWELL VR8204 SERIES GAS VALVE
GAS VALVE SHOWN IN OFF POSITION
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8-- For Honeywell VR8204 gas valves, turn knob on
gas valve counterclockwise to
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ON .
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4-- On Honeywell VR8204 gas valves, turn knob on
gas valve clockwise to
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force.
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ment is necessary, order Lennox part no. 31J81 for
14 X 25 inch filter for G26Q2--50, Q3--50 and Q3--75
units and P--8--7831 for 20 X 25 inch filter for all sizs
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  Remove filter by pressing side filter clips and
pulling filter up and out.
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available from your Lennox dealer, prior to rein-
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  Place filter in bottom of blower compartment be-
neath rear filter clip. Press down on filter sides.
Filter clips flex allowing filter to snap into place.
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1-- Pilot Flame ---- Pilot
flame must surround
the end of flame sen-
sor for proper opera-
tion of pilot safety cir-
cuit. See figure 5.
2-- Burner Flame ---- Start
burner and allow to
operate for a few min-
utes to establish normal burning conditions.
Check burner flame by observation. Flame
should be predominantly blue incolor and strong
in appearance.
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