Gas Valve; Typical Burner/Electrode Orientation; Spark Electrode To Burner Gap; Typical Access To Regulator For Adjustment And L.p. Changeover - Lennox G24M SERIES Unit Information

1/8”(+1/64”)
GROUND SPARK ELECTRODE

SPARK ELECTRODE TO BURNER GAP

F
1/4 in. 7 mm
1/32 in. 0.79
mm
BURNER
SIDE VIEW
FIGURE 16
H--Gas Valve
The G24M uses a gas
well (figure 17) or White Rodgers (figure 18). The valve
is internally redundant to assure safety shut- -off. If the
gas valve must be replaced, the same type valve must
be used.
24VAC terminals and gas control knob are located on top
of the valve. All terminals on the gas valve are connected
to wires from the electronic ignition control. 24V applied
to the terminals energizes the valve.
Inlet and outlet pressure taps are located on the valve. A
regulator adjustment screw is located on the valve. Refer
to figure 17 or 18 for location of valve features.
An LPG changeover kit is available from Lennox. The kit
includes burner orifices and a regulator conversion kit.
I--Combustion Air Blower Prove
(Pressure) Switch (S64)
G24M series units are equipped with a combustion air
prove switch located on the vestibule panel. The switch
is connected to the combustion air blower housing by
means of a flexible silicone hose. It monitors air pres-
sure in the combustion air blower housing.

TYPICAL BURNER/ELECTRODE ORIENTATION

view looking at flame end of burners
UPPER BURNER
MOUNTING RAIL
FLAME RETENTION RING
F
11/16 in. 18 mm
1/32 in. 0.79
3/16 in.
4.7 mm
FLAME
END VIEW
SENSOR
valve manufactured by Honey-
BURNER MANIFOLD
LOWER BURNER
MOUNTING RAIL
FIGURE 15
FOR ADJUSTMENT AND L.P . CHANGEOVER
mm
,1/(7
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GAS VALVE

KNOB SHOWN
IN OFF POSITION
GAS INLET
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Page 15
ORIFICE
TYPICAL ACCESS TO REGULATOR
(Honeywell VR8205 series gas valve shown)
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FIGURE 17
WHITE RODGERS
36E GAS VALVE
FIGURE 18
Top
Right Left
Bottom
FLAME SENSOR
(SOME UNITS MAY HAVE
SENSOR LOCATED IN
MIDDLE OF BURNER)
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635,1*
7DSHUHG (QG
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5HG
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REGULATOR
COVER SCREW
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