Minimum Clearances To Combustible Materials - Bryant 66120 Installation, Start-Up, Operating And Service And Maintenance Instructions

distribution system. Refer to Air Ducts section.
S be provided ample space for servicing and cleaning. Always
comply with minimum fire protection clearances shown in
Table 2 or on the furnace clearance to combustible construction
label.
WARNING
!
CARBON MONOXIDE POISONING / COMPONENT
DAMAGE HAZARD
Failure to follow this warning could result in personal injury
or death and unit component damage.
Corrosive or contaminated air may cause failure of parts
containing flue gas, which could leak into the living space.
Air for combustion must not be contaminated by halogen
compounds, which include fluoride, chloride, bromide, and
iodide. These elements can corrode heat exchangers and
shorten furnace life. Air contaminants are found in aerosol
sprays, detergents, bleaches, cleaning solvents, salts, air
fresheners, and other household products. Do not install
furnace in a corrosive or contaminated atmosphere. Make
sure all combustion and circulating air requirements are met,
in addition to all local codes and ordinances.
The following types of furnace installations may require
OUTDOOR AIR for combustion due to chemical exposures:
S Commercial buildings
S Buildings with indoor pools
S Laundry rooms
S Hobby or craft rooms
S Chemical storage areas
If air is exposed to the following substances, it should not be used
for combustion air, and outdoor air may be required for
combustion:
S Permanent wave solutions
S Chlorinated waxes and cleaners
S Chlorine based swimming pool chemicals
S Water softening chemicals
S De- -icing salts or chemicals
S Carbon tetrachloride
S Halogen type refrigerants
S Cleaning solvents (such as perchloroethylene)
S Printing inks, paint removers, varnishes, etc.
Outlet Restrictor Plate (provided with 40K BTUH furnaces only; see Note)
Drain Extension Tube (Z---pipe) (Provided separately in furnace)
NOTE: The 40K models are the only furnaces that receive the outlet restrictor in loose parts bag. See Maximum Equivalent Vent Length
Table for usage.
POSITION
Front (Combustion air openings in furnace and in structure)
Required for service
All Sides of Supply Plenum
Table 1 – Loose Parts Bag
DESCRIPTION
Air Intake Pipe Flange
Vent Pipe Flange
Pipe Flange Gaskets
Sharp Tip Screws (Vent and Inlet Flanges)
Vent Pipe Coupling
Vent Pipe Coupling Clamps
Pressure Switch Tube
Rubber Drain Elbow
Drain Tube Clamps
1/2---in. CPVC to 3/4---in. PVC Pipe Adapter
Gas Line Grommet
Junction Box Cover
Junction Box Base
Green Ground Screw
Blunt Tip Screws (Junction Box)
Thermostat Wire Grommet
Table 2 – Minimum Clearances to Combustible Materials for All Units
Rear
Sides
S Hydrochloric acid
S Cements and glues
S Antistatic fabric softeners for clothes dryers
S Masonry acid washing materials
All fuel- -burning equipment must be supplied with air for fuel
combustion. Sufficient air must be provided to avoid negative
pressure in the equipment room or space. A positive seal must be
made between the furnace cabinet and the return- -air duct to
prevent pulling air from the burner area.
WARNING
!
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
When the furnace is installed in a residential garage, the
burners and burner ignition devices must be located at least
18 in. (457 mm) above the floor. The furnace must be
located or protected to avoid damage by vehicles. When the
furnace is installed in a public garage, airplane hangar, or
other building having a hazardous atmosphere, the furnace
must be installed in accordance with the current edition of
NFPA 54/ANSI Z223.1 or CAN/CSA B149.2. See Fig. 5.
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Do not install the furnace on its back or hang furnace with
control compartment facing downward. Safety control
operation will be adversely affected. Never connect
return- -air ducts to the back of the furnace. See Fig. 4.
Location Relative to Cooling Equipment
The cooling coil must be installed parallel with, or on the
downstream side of the unit to avoid condensation in the heat
exchangers. When installed parallel with the furnace, dampers or
other flow control must prevent chilled air from entering the
furnace. If the dampers are manually operated, they must be
equipped with means to prevent operation of either unit unless the
damper is in the full- -heat or full- -cool position.
CLEARANCE
0 (0 mm)
1 in. (25 mm)
*24 in. (610 mm)
*1 in. (25 mm)
0 (0 mm)
6
QUANTITY
1
1
1
2
10
1
2
1
1
4
1
1
1
1
1
3
1
1