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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 instruc-
tions.
10. These Multipoise Gas- -Fired Furnaces are CSA design- -cer-
tified for use with natural and propane gases (see furnace
rating plate) and for installation in alcoves, attics, base-
ments, 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 accessory gas conversion kit is
required to convert furnace for use with propane gas.
11. See Table 2 for required clearances to combustible con-
struction.
12. Maintain a 1- -in. (25 mm) clearance from combustible ma-
terials to supply air ductwork for a distance of 36 in. (914
mm) horizontally from the furnace. See NFPA 90B or local
code for further requirements.
13. These furnaces SHALL NOT be installed directly on carpet-
ing, combustible tile, or any other combustible material oth-
er than wood flooring. In downflow installations, factory
accessory floor base MUST be used when installed on com-
bustible materials and wood flooring. Special base is not re-
quired when this furnace is installed on manufacturer's Coil
Assembly or when Coil Box is used. See Table 2 for clear-
ance to combustible construction information.
NOTICE
Important Installation and Start- -up Procedures
Failure to follow this procedure may result in a nuisance
smoke or odor complaint.
The manifold pressure, gas rate by meter clocking,
temperature rise and operation must be checked after
installation.
Minor smoke and odor may be present
temporarily after start- -up from the manufacturing process.
Some occupants are more sensitive to this minor smoke and
odor. It is recommended that doors and windows be open
during the first heat cycle.
INTRODUCTION
This 4- -way multipoise Category IV condensing furnace is CSA
design- -certified as a direct- -vent (2-pipe) or non-direct vent
(1-pipe) furnace. See Fig. 3. The furnace is factory- -shipped for
use with natural gas. The furnace can be converted in the field for
use with propane gas when a factory-supplied conversion kit is
used. Refer to the furnace rating plate for conversion kit
information.
These furnaces are not approved for installation in recreational
vehicles or outdoors.
Single- -stage furnaces (40,000 through
120,000)
are
approved
for
housing/mobile homes with manufacturer- -approved accessory.
The conversion kit is required for use with both natural and
propane gas. The furnace must also be installed on a
factory-supplied accessory combustible floor base or evaporator
coil casing.
This furnace is designed for minimum continuous return- -air
temperature of 60_F (15_C) db or intermittent operation down to
55_F (13_C) db such as when used with a night setback
thermostat. Return-air temperature must not exceed 80_F (27_C)
db. Failure to follow these return-air temperature limits may affect
reliability of heat exchangers, motors, and controls. See Fig. 2.
The furnace should be sized to provide 100 percent of the design
heating load requirement plus any margin that occurs because of
furnace model size capacity increments. None of the furnace
installation
in
manufactured
model sizes can be used if the heating load is 20,000 BTU or
lower. Use Air Conditioning Contractors of America (Manual J
and S); American Society of Heating, Refrigerating, and
Air-Conditioning Engineers; or other approved engineering
method to calculate heating load estimates and select the furnace.
Excessive oversizing of the furnace may cause the furnace and/or
vent to fail prematurely, customer discomfort and/or vent freezing.
Failure to follow these guidelines is considered faulty installation
and/or misapplication of the furnace; and resulting failure, damage,
or repairs may impact warranty coverage.
For accessory installation details, refer to the applicable instruction
literature.
NOTE:
Remove all shipping materials, loose parts bag, and
literature before operating the furnace. See Table 1.
Table 1 – Loose Parts Bag
DESCRIPTION
Outlet Restrictor Plate (provided with 40K BTUH
furnaces only; see Note)
Air Intake Pipe Flange
Vent Pipe Flange
Pipe Flange Gaskets
Sharp Tip Screws (Vent and Inlet Flanges)
Vent Pipe Coupling
Vent Pipe Coupling Clamps
Pressure Switch Tube
Rubber Drain Elbow
Drain Tube Clamps
1/2---in. CPVC to 3/4---in. PVC Pipe Adapter
Gas Line Grommet
Junction Box Cover
Junction Box Base
Green Ground Screw
Blunt Tip Screws (Junction Box)
Thermostat Wire Grommet
Drain Extension Tube (Z---pipe) (Provided separ-
ately in furnace)
NOTE: The 40K size is the only furnace that receives the outlet
restrictor in the loose parts bag.
Equivalent Vent Length.
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:
Safety
S US: Current edition of National Fuel Gas Code (NFGC) NFPA
54/ANSI Z223.1 and the Installation Standards, Warm Air
Heating and Air Conditioning Systems ANSI/NFPA 90B
S A manufactured (Mobile) home installation must conform with
the Manufactured Home Construction and Safety Standard, Title
24 CFR, Part 3280, or when this standard is not applicable, the
Standard for Manufactured Home Installation (Manufactured
Home Sites, Communities, and Set-Ups),ANSI/NCS A225.1,
and/or CAN/CSA-Z240, MH Series Mobile Homes
S CANADA: Current edition of National Standard of Canada,
Natural Gas and Propane Installation Code (NSCNGPIC)
CAN/CSA B149.1
General Installation
S US: NFGC and the NFPA 90B. For copies, contact the National
Fire Protection Association Inc., Batterymarch Park, Quincy,
MA 02269; or for only the NFGC contact the American Gas
Association, 400 N. Capitol, N.W., Washington DC 20001
4
QUANTITY
1
1
1
2
10
1
2
1
1
4
1
1
1
1
1
3
1
1
See Table 16, Maximum
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