5
High Altitude Installations
■
This furnace is approved for operation at altitudes from 0 to
4,500 ft (0 to 1,371.6 m) above sea level without any required
modifications.
■
From 4,500 to 7,500 ft, (1,371.6 m to 2,286 m) the gas
manifold pressure needs to be adjusted according to the
information shown in the Manifold Pressure vs. Altitude
Chart.
IMPORTANT:
For installations above 7,500 ft (2,286 m), the furnace input rate is
to be reduced according to the requirements of the National Fuel
Gas Code (ANSI Z223.1/NFPA 54, latest edition), at the rate of
4 percent for each 1,000 ft (304.8 m) above sea level.
The furnace is not recommended for installation above 10,000 ft
(3,048 m).
Installation Configurations
IMPORTANT: To ensure access to parts for servicing, install the
furnace so that the burner and blower access panels are readily
accessible.
Ductwork Requirements
■
Install all conditioned air plenums, ducts and air filters (if not
provided on the furnace) in accordance with NFPA 90B
Standard for the Installation of Warm Air Heating and Air-
Conditioning Systems (latest edition).
■
The furnace is provided with flanges for the connection of the
plenum and ducts.
■
All air filters must be listed as Class 2 furnace air filters.
■
All ductwork must be made of materials and insulated to
meet local, state and national codes. Ductwork installed
outdoors must be sealed, weatherproofed and protected
against physical damage. Caulking, flashing or other means
of adequately providing a permanent weather seal should be
used where duct penetrates a building or structure opening.
Electrical Requirements
■
The furnace must be grounded and wired in accordance with
local codes or, in the absence of local codes, with the
National Electrical Code ANSI/NFPA No. 70 (latest edition).
■
In all instances, other than wiring for the thermostat, the
wiring to be done and any replacement of wire shall conform
with the temperature limitation for Type T wire (63°F rise).
■
The line voltage supply should be routed through a readily
accessible disconnect located within sight of the furnace. A
junction box on the furnace side panel is provided for line
voltage connections. See the furnace wiring diagram for
specific connection information.
■
Proper polarity of the supply connections (“HOT” and
“NEUTRAL”) must be observed to be sure that safety controls
provide the protection intended.
Gas Supply Requirements
This furnace is equipped for use with Natural gas. A conversion
kit is required for use with propane. To order the correct
conversion kit, see “Accessories.”
■
Gas supply piping should be installed in accordance with
local, state and national codes and the regulations of the
utility. Piping must be of adequate size to avoid undue
pressure drop. Consult the local utility or gas supplier for
complete details on special requirements for sizing gas
piping.
■
If local codes allow the use of a flexible gas appliance
connector, use a CSA design-certified outdoor flexible
stainless steel appliance connector or rigid gas supply line as
needed. Do not use a connector which has previously
serviced another gas appliance.
Venting Requirements
Adequate provisions for combustion air and ventilation of furnace
must be made. Refer to Section 5.3, “Air for Combustion and
Ventilation,” of the National Fuel Gas Code, ANSI Z223.1/NFPA54
(latest edition), or applicable provisions of the local building
codes.
WARNING
Electrical Shock Hazard
Electrically ground furnace.
Connect ground wire to green ground screw.
Failure to do so can result in death or electrical shock.
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