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FURNACE SIZE
CABINET WIDTH
045-08/024045
045-12/036045
070-08/024070
070-12/036070
070-16/048070
090-14/042090
090-16/048090
090-20/060090
110-12/036110
110-16/048110
110-22/066110
135-16/048135
135-22/066135
155-20/060155
* 5" or 6" vent connector may be required in some cases.
the "Venting" section of these instructions.
5. Never test for gas leaks with an open flame. Use a commer-
cially available soap solution made specifically for the detec-
tion of leaks to check all connections, as specified in the "Gas
Piping" section.
6. Always install furnace to operate within the furnace's intended
temperature-rise range with a duct system which has an
external static pressure within the allowable range, as speci-
fied in the "Start-Up, Adjustments, and Safety Check" section.
See furnace rating plate.
7. When a furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside the space containing
the furnace, the return air shall also be handled by duct(s)
sealed to the furnace casing and terminating outside the space
containing the furnace. See "Air Ducts" section.
8. A gas-fired furnace for installation in a residential garage must
be installed as specified in the warning box in the "Location"
section.
→
9. The furnace may be used for construction heat provided that
the furnace installation and operation complies with the first
CAUTION in the LOCATION section of these instructions.
10. These Multipoise Gas-Fired Furnaces are CSA (formerly
A.G.A. and C.G.A.) design-certified for use with natural and
propane gases (see furnace rating plate) and for installation in
alcoves, attics, basements, closets, utility rooms, crawlspaces,
and garages. The furnace is factory-shipped for use with
natural gas. A CSA listed gas conversion kit is required to
convert furnace for use with propane gas.
11. See Fig. 2 for required clearances to combustible construction.
12. Maintain a 1-in. clearance from combustible materials to
supply air ductwork for a distance of 36 inches horizontally
from the furnace. See NFPA 90B or local code for further
requirements.
13. These furnaces SHALL NOT be installed directly on carpet-
ing, tile, or any other combustible material other than wood
flooring. In downflow installations, factory accessory floor
base MUST be used when installed on combustible materials
and wood flooring. Special base is not required when this
furnace is installed on manufacturer's Coil Assembly Part No.
CD5 or CK5, or when Coil Box Part No. KCAKC is used. See
Table 1—Dimensions (IN.)
D
A
SUPPLY-AIR
WIDTH
(IN.)
14-3/16
12-9/16
14-3/16
12-9/16
14-3/16
12-9/16
14-3/16
12-9/16
17-1/2
15-7/8
17-1/2
15-7/8
21
19-3/8
21
19-3/8
17-1/2
15-7/8
21
19-3/8
21
19-3/8
21
19-3/8
24-1/2
22-7/8
24-1/2
22-7/8
F
E
C.L. TOP AND
RETURN-AIR
BOTTOM
WIDTH
FLUE COLLAR
(IN.)
(IN.)
12-11/16
9-5/16
12-11/16
9-5/16
12-11/16
9-5/16
12-11/16
9-5/16
16
11-9/16
16
11-9/16
19-1/2
13-5/16
19-1/2
13-5/16
16
11-9/16
19-1/2
13-5/16
19-1/2
13-5/16
19-1/2
13-5/16
23
15-1/16
23
15-1/16
Fig. 2 for clearance to combustible construction information.
Series 120/C 4–way multipoise Category I fan-assisted furnace is
CSA design-certified. A Category I fan-assisted furnace is an
appliance equipped with an integral mechanical means to either
draw or force products of combustion through the combustion
chamber and/or heat exchanger. The furnace is factory-shipped for
use with natural gas. This furnace is not approved for installation
in mobile homes, recreational vehicles, or outdoors.
This furnace is designed for minimum continuous return-air
temperature of 60°F db or intermittent operation down to 55°F db
such as when used with a night setback thermostat. Return-air
temperature must not exceed 85°F db. Failure to follow these
return-air temperature limits may affect reliability of heat exchang-
ers, motors, and controls. (See Fig. 3.)
For accessory installation details, refer to the applicable instruction
literature.
NOTE: Remove all shipping brackets and materials before oper-
ating the furnace.
CODES AND STANDARDS
Follow all national and local codes and standards in addition to
these instructions. The installation must comply with regulations
of the serving gas supplier, local building, heating, plumbing, and
other codes. In absence of local codes, the installation must
comply with the national codes listed below and all authorities
having jurisdiction.
In the United States and Canada, follow all codes and standards for
the following:
Step 1—Safety
• US: National Fuel Gas Code (NFGC) NFPA 54–2002/ANSI
Z223.1–2002 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANSI/NFPA 90B
• CANADA: CSA B149.1-00 National Standard of Canada
Natural Gas and Propane Installation Codes (NSCNGPIC)
3
FLUE
COLLAR*
SHIP WT (LB)
(IN.)
4
104
4
107
4
111
4
115
4
126
4
127
4
140
4
146
4
135
4
146
4
152
4
149
4
163
4
170
INTRODUCTION
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