Bryant 340AAV Installation, Start-Up, And Operating Instructions Manual page 19

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.
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 and from draft
safeguard opening.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury
or death.
The operation of exhaust fans, kitchen ventilation fans, clothes
dryers, attic exhaust fans or fireplaces could create a
NEGATIVE PRESSURE CONDITION at the furnace.
Make-up air MUST be provided for the ventilation devices, in
addition to that required by the furnace. Refer to the Carbon
Monoxide Poisoning Hazard warning in the venting section of
these instructions to determine if an adequate amount of
make-up air is available.
The requirements for combustion and ventilation air depend upon
whether or not the furnace is located in a space having a volume
of at least 50 cubic feet per 1,000 Btuh input rating for all gas
appliances installed in the space.
S Spaces having less than 50 cubic feet per 1,000 Btuh require
the OUTDOOR COMBUSTION AIR METHOD.
S Spaces having at least 50 cubic feet per 1,000 Btuh may use
the INDOOR COMBUSTION AIR, STANDARD or
KNOWN AIR INFILTRATION METHOD.
Outdoor Combustion Air Method
1. Provide the space with sufficient air for proper
combustion, ventilation, and dilution of flue gases using
permanent horizontal or vertical duct(s) or opening(s)
directly communicating with the outdoors or spaces that
freely communicate with the outdoors.
2. Fig. 18 illustrates how to provide TWO OUTDOOR
OPENINGS, one inlet and one outlet combustion and
ventilation air openings to the outdoors.
a. One opening MUST commence within 12-in. (305
mm) of the ceiling and the second opening MUST
commence within 12-in. (305 mm) of the floor.
b. Size openings and ducts per Fig. 18 and Table 1.
c. TWO HORIZONTAL DUCTS require 1 square inch of
free area per 2,000 Btuh (1,100 mm
input for all gas appliances in the space per Fig. 18
and Table 1.
d. TWO OPENINGS OR VERTICAL DUCTS require 1
square inch of free area per 4,000 Btuh (550 mm
for combined input of all gas appliances in the space
per Fig. 18 and Table 1.
Indoor Combustion Air© NFPA & AGA
Standard and Known-Air-Infiltration Rate Methods
Indoor combustion air is permitted for combustion, ventilation,
and dilution, if the Standard or Known-Air-Infiltration Rate
Method is used.
CARBON MONOXIDE POISONING HAZARD
Failure to supply outdoor air via grilles or ducts could result in
death and/or personal injury.
Many homes require air to be supplied from outdoors for
furnace combustion, ventilation, and dilution of flue gases.
The furnace combustion air supply must be provided in
accordance with this instruction manual.
The Standard Method:
The Known Air Infiltration Rate Method shall be used, if the
infiltration rate is known to be:
Infiltration rates greater than 0.60 ACH shall not be used. The
minimum required volume of the space varies with the number of
ACH and shall be determined per Table 2 or Equations 1 and 2.
Determine the minimum required volume for each appliance in
the space and add the volumes together to get the total minimum
required volume for the space.
Table 2 - - Minimum Space Volumes were determined by using
the following equations from the National Fuel Gas Code NFPA
54/ANSI
2
/kW) of combined
2
/kW)
- - 19 - -
3. ONE OUTDOOR OPENING requires:
a. 1 square inch of free area per 3,000 Btuh
2
(734 mm /kW) for combined input of all gas
appliances in the space per Table 1 and
b. Not less than the sum of the areas of all vent connectors
in the space.
The opening shall commence within 12-in. (305 mm) of
the ceiling. Appliances in the space shall have
clearances of at least 1-in. (25 mm) from the sides and
back and 6-in. (152 mm) from the front. The opening
shall directly communicate with the outdoors or shall
communicate through a vertical or horizontal duct to the
outdoors or spaces (crawl or attic) that freely
communicate with the outdoors.
WARNING
!
1. The space has no less volume than 50 cubic feet per
1,000 Btuh of the maximum input ratings for all gas
appliances installed in the space and
2. The air infiltration rate is not known to be less than 0.40
air changes per hour (ACH).
1. Less than 0.40 ACH and
2. Equal to or greater than 0.10 ACH
Z223.1- -2006, 9.3.2.2:
1. For other than fan-assisted appliances, such as a draft
hood-equipped water heater
2. For fan-assisted appliances such as this furnace:
A04002
A04003