Table of Contents
Advertisement
INSTALLATION INSTRUCTIONS
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. (See Figure 4)
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 on page 8
of these instructions.
10.
These Multipoise Gas--Fired Furnaces are CSA
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
accessory gas conversion kit is required to convert
furnace for use with propane gas.
11.
See Table 1 for required clearances to combustible
construction.
12.
Maintain a 1--in. (25 mm) clearance from combustible
materials 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.
Minimum Clearances to
Table 1
Combustible Materials for All Units
POSITION
REAR
FRONT (Combustion air openings in
furnace and in structure)
Recommended for service
All Sides of Supply Plenum
Sides
Vent
Top of Furnace
* Consult local building codes
13.
These furnaces SHALL NOT be installed directly on
carpeting, combustible 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 or when
Coil Box is used. See Table 1 for clearance to
combustible construction information.
NOTICE
IMPORTANT
INSTALLATION
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.
4
Introduction
The 4--way multipoise Category IV condensing furnace is CSA
design--certified as a direct vent (2--pipe) or non--direct vent
(1--pipe)
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.
120k)
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
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 (15°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 Figure 1)
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 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
CLEARANCE
approved engineering method to calculate heating load
In(mm)
estimates and select the furnace. Excessive oversizing of the
furnace may cause the furnace and/or vent to fail prematurely,
0
customer discomfort and/or vent freezing.
1 (25)
Failure to follow these guidelines is considered faulty
installation and/or misapplication of the furnace; and resulting
*24 (610)
failure, damage, or repairs may impact warranty coverage.
*1 (25)
For accessory installation details, refer to the applicable
instruction literature.
0
NOTE: Remove all shipping materials, parts assemblies and
0
literature before operating the furnace.
1 (25)
AND
START- -UP
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:
Specifications subject to change without notice.
furnace.
(See
Single-stage furnaces (40k through
are
approved
for
accessory
Air--Conditioning Engineers; or other
Freeze Protection and Return Air
Figure 1
Temperature
SUPPLY AIR
SEE PRODUCT DATA FOR
ACCESSORY CONDENSATE
TRAP HEATER AND CONDENSATE
DRAIN LINE PROTECTION.
Gas Furnace: N9MSB
Figure 3)
The
furnace
installation
in
manufactured
combustible
floor
base
80
/ 27˚C
60
/ 16˚C
A150573
440 01 4104 07
is
or
Advertisement
Table of Contents
