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G24−200 Gas Furnace
The G24−200 upflow gas furnace is for use with natural
gas only.
Each G24−200 requires the installation of a separately or-
dered drive kit. The available drive kits are listed in tables 10
and 15. Provided in each drive kit is the following: the fur-
nace’s blower motor, its 24 volt control transformer, and (in
non-208/230 volt models) an autotransformer for each of the
furnaces’s induced draft blowers.
Also available for order separately is a filter box kit for rear or
bottom return air applications.
This furnace has two independently controlled heat sections,
each with an input of 100MBH and each operating in a two-
stage (low heat/high heat) mode. The C17−090/120 cooling
coil has been designed for use with this furnace and can be
connected to either a single condensing unit or to two con-
densing units. (See C17 coil installation instructions.)
Shipping and Packing List
Package 1 of 3 contains:
1 − Assembled unit (vent adapters are factory-installed)
1 − Flexible gas connector
Package 2 of 3 contains:
1 − Filter box assembly
Package 3 of 3 contains:
1 − Blower drive kit consisting of:
1 − Blower motor
1 − Motor pulley
1 − Belt
1 or 3 − Transformer(s)
1 − Bag assembly containing wiring parts
1 − Bag assembly containing securing hardware
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
Safety
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a qualified installer, service agency
or the gas supplier.
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
Use only the type of gas approved for use with this furnace.
Refer to unit nameplate.
Lennox G24−200 units are CSA international certified to
ANSI Z21.47 and CSA 2.3 standard.
In the USA, installation of Lennox gas central furnaces
must conform with local building codes. In the absence of
local codes, units must be installed in accordance with the
current National Fuel Gas Code (ANSI−Z223.1/NFPA54).
The National Fuel Gas Code is available from:
American National Standards Institute, Inc.
11 West 42nd Street
New York, NY 10036
In Canada, installation must conform with current National
Standard of Canada CSA−B149.1 Natural Gas and Pro-
pane Installation Codes", local plumbing or waste water
codes and other applicable local codes.
Adequate clearance must be made around the air open-
ings into the vestibule area. Provisions must be made for
proper operation and for combustion air and ventilation air
supply according to the current National Fuel Gas Code or
CSA-B149 standards.
In the U.S.A, vent installations shall be in accordance with
the venting tables provided in this manual and the applica-
ble provisions of local building codes.
In Canada, vent installations shall be in accordance with
the venting tables in the current editions of the CSA B149
codes and the applicable provisions of local building
codes.
This furnace is CSA international certified for installation
clearances to combustible material as listed on unit rating
plate and in table 1. Accessibility and service clearances
must take precedence over fire protection clearances.
TABLE 1
INSTALLATION CLEARANCES INCHES (mm)
CLEARANCE
VENT CONNECTOR TYPE
CLEARANCE
TYPE C TYPE B1
TOP 1 (25) 1 (25)
FRONT* 3 (76) 3 (76)
BACK 0 0
SIDES 0 0
VENT 6 (152) 1 (25)
FLOOR 0** 0**
* Front clearance must be 24 inches (610mm) minimum for
service access.
** For installation on combustible floors, appliance shall not be
installed directly on carpeting, tile, or other combustible materi-
al other than wood flooring.
Maintain adequate clearance for filter access. See section
on Return Air Plenum/Filter Box Installation."