G32V FURNACE
G32V HEAT EXCHANGE ASSEMBLY
Combustion Process:
1. A call for heat starts the combustion air blower.
2. Outdoor air is drawn through pipe into the burner
compartment where it mixes with gas in a con-
ventional style inshot burner.
3. The SureLight ignition system lights the burners.
4. Combustion products are drawn downward
through the heat exchanger. Heat is extracted
as indoor air passes across the outside surface
of the metal.
5. Latent heat is removed from the combustion
products as air passes through the coil. Conden-
sate (water) is formed as the combustion prod-
ucts cool.
6. As the combustion products exit the coil, con-
densate is collected and drained away.
7. Combustion products are pulled from the heat
exchanger and forced into the flue.
Page 1
© 1998 Lennox Industries Inc.
Litho U.S.A.
Corp. 9816−L10
G32V
Service Literature
Revised 02−2004
G32V SERIES UNITS
G32V series units are high−efficiency upflow gas furnaces manufactured with
DuralokPlus aluminized steel clamshell-type heat exchangers. G32V units
are available in heating capacities of 75,000 to 125,000 Btuh and cooling ap-
plications up to 5 tons. Refer to Engineering Handbook for proper sizing.
Units are factory equipped for use with natural gas. LP kits are available. All
G32V−1 through −4 units feature the Lennox SureLight silicon nitride ignition
system. G32V−5 and later units feature the two stage variable speed SureLight
integrated control board.The G32V units meet the California Nitrogen Oxides
(NO
x
) Standards and California Seasonal Efficiency requirements without mod-
ification. All units use a two−stage gas valve along with a two−stage combustion
air blower. The gas valve is redundant to assure safety shut−off as required by
A.G.A. or C.G.A.
All G32V units are equipped with an electronic variable speed (VSM) fan mo-
tor. The VSM consists of an ICM2 motor and control module assembly. The
VSM maintains a specified air volume throughout the entire external static
range.
Information contained in this manual is intended for use by qualified service
technicians only. All specifications are subject to change. Procedures outlined
in this manual are presented as a recommendation only and do not supersede
or replace local or state codes. In the absence of local or state codes, the
guidelines and procedures outlined in this manual (except where noted) are
recommended only.
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