3. Provide adequate combustion and ventilation air to the furnace
space as specified in “Air for Combustion and Ventilation”
section.
4. Combustion products must be discharged outdoors. Connect
this furnace to an approved vent system only, as specified in
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 is not to be used for temporary heating of
buildings or structures under construction. See page 7 for
caution box.
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 (A.G.A. and C.G.A.) 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
Fig. 2 for clearance to combustible construction information.
INTRODUCTION
The Series 110/B 4–way multipoise Category I fan-assisted
furnace is CSA (formerly A.G.A. and C.G.A.) 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 ex-
changer. The furnace is factory-shipped for use with natural gas.
This furnace is not approved for installation in mobile homes,
recreational vehicles, or outdoors.
These furnaces shall not be installed directly on carpeting, tile, or
any other combustible material other than wood flooring. For
downflow installations, a factory accessory floor base must be
used when installed on combustible materials and wood flooring.
This special base is not required when this furnace is installed on
the manufacturer’s coil assembly, or when the manufacturer’s coil
box is used. See Fig. 2 for clearance to combustible material
information.
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.
→ Table 1—Dimensions (IN.)
FURNACE SIZE
A
CABINET
WIDTH
(IN.)
D
SUPPLY-AIR
WIDTH
(IN.)
E
RETURN-AIR
WIDTH
(IN.)
F
C.L. TOP AND
BOTTOM
FLUE COLLAR
(IN.)
FLUE
COLLAR*
(IN.)
SHIP WT. (LB)
FILTER
MEDIA
CABINET
SIZE
(IN.)
045-08/024045 14-3/16 12-9/16 12-11/16 9-5/16 4 116 16
045-12/036045 14-3/16 12-9/16 12-11/16 9-5/16 4 119 16
070-08/024070 14-3/16 12-9/16 12-11/16 9-5/16 4 120 16
070-12/036070 14-3/16 12-9/16 12-11/16 9-5/16 4 124 16
070-16/048070 17-1/2 15-7/8 16 11-9/16 4 138 16
090-14/042090 17-1/2 15-7/8 16 11-9/16 4 136 16
090-16/048090 21 19-3/8 19-1/2 13-5/16 4 151 20
090-20/060090 21 19-3/8 19-1/2 13-5/16 4 156 20
110-12/036110 17-1/2 15-7/8 16 11-9/16 4 144 16
110-16/048110 21 19-3/8 19-1/2 13-5/16 4 158 20
110-22/066110 21 19-3/8 19-1/2 13-5/16 4 163 20
135-16/048135 21 19-3/8 19-1/2 13-5/16 4† 163 20
135-22/066135 24-1/2 22-7/8 23 15-1/16 4† 174 24
155-20/060155 24-1/2 22-7/8 23 15-1/16 4† 181 24
* 5” or 6” vent connector may be required in some cases.
† 135 and 155 size furnaces require five-inch or larger vents. Use a 4-5 or 4-6 inch vent adapter between furnace and vent connector.
3
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