Location; General; Furnace Location Relative To Cooling Equipment; Hazardous Locations - Bryant 349HAV Series Installation, Start-Up, And Operating Instructions Manual

This furnace is designed for a minimum continuous return-air
temperature of 60°F db or intermittent operation down to 55°F db
such as when used with a night setback thermostat. Return-air
temperature must not exceed a maximum of 85°F db.
WARNING: Improper installation, adjustment, alter-
ation, service, maintenance, or use can cause carbon
monoxide poisoning, explosion, fire, electrical shock, or
other conditions which may cause personal injury or
property damage. Consult a qualified installer, service
agency, local gas supplier, your distributor, or your
branch for information or assistance. The qualified in-
staller or agency must use only factory-authorized and
listed kits or accessories when modifying this product.
Failure to follow this warning could result in electrical
shock, fire, personal injury, or death.
For accessory installation details, refer to the applicable installa-
tion literature.
NOTE: Remove all shipping brackets and materials before oper-
ating furnace.

LOCATION

I. GENERAL
CAUTION: Do not install furnace in a corrosive or
contaminated atmosphere. Make sure all combustion and
circulating air requirements are followed, in addition to
all local codes and ordinances.
Do not use this furnace during construction when adhe-
sives, sealers, and/or new carpets are being installed. If
the furnace is required during construction, use clean
outside air for combustion and ventilation. Compounds of
chlorine and fluorine when burned with combustion air
form acids which cause corrosion of the heat exchangers
and metal vent system. Some of these compounds are
found in paneling and dry wall adhesives, paints, thin-
ners, masonry cleaning materials, and many other sol-
vents commonly used in the construction process. Exces-
sive exposure to contaminated combustion air will result
in safety and performance related problems.
This furnace may be located in an attic, basement, crawlspace,
alcove, or suspended from the ceiling of a utility room or
basement.
WARNING: Do not install the furnace on its back or
side. Safety control operation will be adversely affected.
Never connect return-air ducts to the back of the furnace.
Failure to follow this warning could result in a fire,
personal injury, or death.
When a furnace is installed so that the supply ducts carry air to
areas outside the space containing the furnace, return air must also
be handled by duct(s) sealed to furnace casing and terminating
outside the space containing furnace to ensure there will not be a
negative pressure condition within the equipment room or space.
This furnace must be located so electrical components are pro-
tected from water.
Locate furnace close to the chimney/vent and as near the center of
air distribution system as possible. The furnace should not be
connected to an operating chimney that also serves a solid fuel
burning appliance.
Provide ample space for servicing and cleaning. Always comply
with the minimum fire protection clearances shown on the unit
rating plate and in Table 1. A clurance of at least 30 in. should be
provided at front of unit for servicing.
Locate furnace where available electrical and gas supplies meet the
specifications on furnace rating plate.
Line contact is only permissible between lines formed by the
intersection of furnace top and front and back sides and building
joists, studs, or framing. (See Fig. 2.)
KEEP ALL INSULATING MATERIAL
CLEAR OF FURNACE. INSULATING
MATERIAL MAY BE COMBUSTIBLE.
Fig. 2—Attic Installation Showing Point Contact
For attic installations, the passageway and servicing area adjacent
to furnace should be floored.
If furnace is to be installed in a crawlspace, consult local codes.
Use of a concrete pad 1 to 2 in. thick is recommended.
II. FURNACE LOCATION RELATIVE TO COOLING
EQUIPMENT
The cooling coil must be installed parallel with or on the
downstream side of the furnace to avoid condensation in the heat
exchanger. When installed parallel with a furnace, dampers or
other means used to control the flow of air must prevent chilled air
from entering the furnace. If the dampers are manually operated,
they must be equipped with a means to prevent operation of either
unit unless the damper is in the full-heat or full-cool position.
III. HAZARDOUS LOCATIONS
When furnace is installed in a residential garage, it must be
installed so that the burners and ignition source are located a
minimum of 18 in. above the floor. Furnace must be located or
protected to avoid physical damage by vehicles.
When furnace is installed in a public garage, airplane hangar, or
another building having a hazardous atmosphere, the unit must be
installed in accordance with the requirements of the National Fire
Protection Association, Inc.
WARNING: Do not place combustible material on fur-
nace jacket. Failure to comply with this warning will
cause an explosion.
WARNING: This furnace is not watertight and is not
designed for outdoor installation. This furnace shall be
installed in such a manner as to protect the electrical
components from water. Outdoor installation would lead
to a hazardous electrical condition and premature com-
ponent failure.

AIR FOR COMBUSTION AND VENTILATION

I. GENERAL
Provisions for adequate combustion and ventilation air must be
provided in accordance with Section 5.3, Air for Combustion and
Ventilation, of the NFGC, or applicable provisions of local
building codes.
—3—
ROOF
LINE CONTACT ONLY
PERMISSIBLE BETWEEN
TOP CORNERS OF
FURNACE AND BUILDING
JOISTS, STUDS, OR
FRAMING.
A96069