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Furnaces shall not be installed directly on carpet-
ing, tile or other combustible material other than
wood flooring. An accessory combustible floor
base is available to allow direct installation of
downflow models on combustible flooring.
Furnace shall be installed so the electrical compo-
nents are protected from water.
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 applica-
ble, the Standard for Manufactured Home Installations (Man-
ufactured Home Sites, Communities and Set-Ups), ANSI
A225.1, and/or CAN/CSA-Z240 MH Series, Mobile Homes.
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.
Refer to furnace rating plate for the type of gas approved for
this furnace - only use those approved gases.
Check the rating plate and power supply to be sure that the
electrical characteristics match. All models use nominal 115
VAC, 1 Phase, 60 Hertz power supply.
For installations above 2,000 feet, reduce input 4% for each
1,000 feet above sea level.
For installation between 2000 and 4500 feet, it is not required
that the pressure switch be changed, provided the maximum
vent/intake pipe lengths are adjusted as shown in the Note
from Tables 4, 5 and 7 on Pages 16 & 20. For altitudes above
4,500 feet, refer to instructions 035-14460-000 for correct
pressure switch/orifice or other required conversion informa-
tion.
The furnace shall not be connected to a chimney flue serving
a separate appliance designed to burn solid fuel.
A furnace installed in a residential garage shall be located so
that all burners and burner ignition devices are located not
less that 18" above the garage floor, and located or protected
to prevent damage by vehicles.
Allow clearances from combustible materials as listed under
Clearances to Combustibles, ensuring that service access is
allowed for both the burners and blower.
4
The furnace shall be located using these guidelines:
1.
Where a minimum amount of air intake/vent piping and
elbows will be required.
2.
As centralized with the air distribution as possible.
3.
Where adequate combustion air will be available (partic-
ularly when installing as 1-pipe system).
4.
In an area where ventilation facilities provide for safe lim-
its of ambient temperature under normal operating condi-
tions. Ambient temperatures must not fall below 32°F
(0°C) unless the condensate system is protected from
freezing (refer to "BELOW FREEZING LOCATIONS" on
page 4).
5.
Where it will not interfere with proper air circulation in the
confined space.
6.
Where the outdoor combustion air/vent terminal will not
be blocked or restricted.
CLEARANCES TO COMBUSTIBLES
Minimum clearances from combustible construction are
shown in Table 3, "UNIT CLEARANCES TO COMBUSTI-
BLES," on page 7. These minimum clearances must be
maintained in the installation.
BELOW FREEZING LOCATIONS
If this furnace is installed in any area where the ambient tem-
perature may drop below 32° F, a UL listed self regulated
heat tape must be installed on any condensate drain lines. It
is recommended that self regulating heat tape rated at 3
watts per foot be used. This must be installed around the con-
densate drain lines in the unconditioned space. Always install
the heat tape per the manufacturer's instructions. Cover the
self-regulating heat tape with fiberglass or other heat resis-
tant, insulating material.
If this unit is installed in an unconditioned space
and an extended power failure occurs, there will
be potential damage to the condensate trap, drain
lines and internal unit components. Following a
power failure situation, Do Not Operate the Unit
Until Inspection and Repair Are Performed.
035-17477-001 Rev. A (801)
Unitary Products Group
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