035-17438-001 Rev. A (901)
Unitary Products Group
3
LIMITATIONS AND LOCATION
This furnace should be installed in accordance with all
national/local building/safety codes and requirements, or in
the absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1 (latest edition) or, in Canada, CAN/CGA B149.1
or .2 (latest edition), and other applicable codes.
Use only the type of gas approved for this furnace; refer to
the furnace rating plate.
NOTES, CAUTIONS & WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION and WARNING. NOTES are intended to
clarify or make the installation easier. CAUTIONS are given
to prevent equipment damage. WARNINGS are given to alert
the installer that personal injury and/or equipment or property
damage may occur if installation procedures are not handled
properly.
Each furnace in this series is a Category I furnace, suitable
for common venting with other gas-fired appliances as
allowed by the National Fuel Gas Code, NFPA 54/ANSI
Z223.1latest edition.
For installations above 2,000 feet, reduce input 4% for each
1,000 feet above sea level. Canadian installations must be
derated 10% for elevations from 2,000 ft. to 4,500 ft. See
Form 035-14461-000 for information to properly derate fur-
nace.
For installations between 2000 and 4500 feet, it is not
required that the pressure switch be changed. For altitudes
above 4500 feet, the appropriate high altitude kit must be
used.
Furnace shall not be connected to a chimney flue serving a
separate appliance designed to burn solid fuel.
Check the rating plate and power supply to be sure that elec-
trical characteristics match. All models use nominal 115 vac,
1 phase, 60 Hz. power supply.
A furnace installed in a residential garage must be located so
that all burners and burner ignition devices are located no
less than 18" above the garage floor, and located or pro-
tected to prevent damage by vehicles.
The size of the unit should be based on an acceptable heat
loss calculation for the structure. ACCA, Manual J or other
approved methods may be used.
The furnace should be located using these guidelines:
1.
Where a minimum amount of vent piping and elbows will
be required.
2.
As centralized with the air distribution as possible.
3.
Where adequate combustion air will be available.
4.
In an area where ventilation facilities provide for safe lim-
its of ambient temperature under normal operating condi-
tions.
5.
Where it will not interfere with proper air circulation in the
confined space.
6.
Where the vent will not be blocked or restricted.
7.
Where sufficient space is provided to allow proper ser-
vice access. Minimum recommended service clearances
are as follows:
Twenty four (24) inches between the front of the furnace
and an adjacent wall or another appliance, when access
is required for servicing and cleaning.
Eighteen (18) inches at the side where access is
required for passage to the front when servicing or for
inspection or replacement of flue/vent connections.
8.
Where it will not interfere with the cleaning, servicing or
removal of other appliances.
9.
Where the following minimum clearances (in inches) to
combustibles can be maintained. Please see, Table 1 on
page 4.
UNIT INSTALLATION
COMBUSTION AIR
All installations must comply with Section 5.3, Air for Com-
bustion and Ventilation of the National Fuel Gas Code, ANSI
Z223.1 or Sections 7.2, 7.3 or 7.4 of CAN/CGA B149.1 or .2
Installation Code latest editions.
An unconfined space is not less than 50 cubic feet per 1000
Btu/hr input rating for all appliances installed in that area.
Rooms communicating directly with the space containing the
appliances are considered part of the unconfined space, if
openings are not furnished with doors.
A confined space is an area with less than 50 cubic feet per
1000 Btu/hr input rating for all appliances installed in that
area.
The following must be considered to obtain proper air for
combustion and ventilation in confined spaces.
Only use natural gas in furnaces designed for natu-
ral gas. Do not use this furnace with butane. Using
wrong gas could create a hazard, resulting in dam-
age, injury or death.
