Air For Combustion And Ventilation - Carrier 58SP0B Installation, Start-Up, Operating And Service And Maintenance Instructions

58SP0B/58SP1B: Installation, Start–Up, Operating and Service and Maintenance Instructions
CAUTION
!
FURNACE CORROSION HAZARD
Failure to follow this caution may result in furnace damage.
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.

AIR FOR COMBUSTION AND VENTILATION

Provisions for adequate combustion, ventilation, and dilution air must be
provided in accordance with:
• U.S. Installations: Current edition of NFPA 54/ANSI Z223.1 Section
9.3, Air for Combustion and Ventilation and applicable provisions of
the local building codes.
CAUTION
!
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.
• Spaces having less than 50 cubic feet per 1,000 BTUh require the
OUTDOOR COMBUSTION AIR METHOD.
• 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. 7 illustrates how to provide TWO OUTDOOR OPENINGS,
one inlet and one outlet combustion and ventilation air opening, to
the outdoors.
a. One opening MUST commence within 12 in. (300 mm) of the
ceiling and the second opening MUST commence within 12 in.
(300 mm) of the floor.
b. Size openings and ducts per
c. TWO HORIZONTAL DUCTS require 1 sq. in. (645 sq. mm) of
free area per 2,000 BTUh (1,100 mm
for all gas appliances in the space per
d. TWO OPENINGS OR VERTICAL DUCTS require 1 sq. in.
(645 sq. mm) of free area per 4,000 BTUh (550 mm
combined input of all gas appliances in the space per
Table 1.
3. ONE OUTDOOR OPENING requires:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 7 and Table 1.
2
/kW) of combined input
Fig. 7 and Table 1.
2
/kW) for
Fig. 7
a. 1 sq. in. (645 sq. mm) of free area per 3,000 BTUh (734
2
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.
* Minimum dimensions of 3-in. (76 mm).
NOTE: Use any of the following combinations of openings: A & B C & D D & E F & G
Fig. 7 – Air for Combustion, Ventilation, and Dilution for Outdoors
.
* Minimum opening size is 100 sq in. (64516 sq. mm) with minimum dimensions of
3 in. (76 mm)
† Minimum of 3 in. (76 mm) when type-B1 vent is used.
Fig. 8 – Air for Combustion, Ventilation, and Dilution from Indoors
The opening shall commence within 12 in. (300 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. (150 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.
Indoor Combustion Air - NFPA & AGA
Standard and Known-Air-Infiltration Rate Methods
Indoor air is permitted for combustion, ventilation, and dilution, if the
Standard or Known-Air-Infiltration Method is used.
and
7
A03174
A03175