Bradford White Brute MagnaTech BMGH1600, Инструкция по установке и эксплуатации

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shall communicate directly, or by ducts, with the
outdoors or spaces that freely communicate with
the outdoors. When directly communicating with the
outdoors, or when communicating to the outdoors
through vertical ducts, each opening shall have a
minimum free area of 1 square inch per 4000 Btu/
hr (550 square mm/kW) of total input rating of all
equipment in the enclosure. When communicating
to the outdoors through horizontal ducts, each
opening shall have a minimum free area of not less
than 1 square inch per 2000 Btu/hr (1100 square
mm/kW) of total input rating of all equipment in the
enclosure.
Method 2 : One permanent opening, commencing
within 12” (300 mm) of the top of the enclosure,
shall be permitted. The opening shall directly
communicate with the outdoors or shall
communicate through a vertical or horizontal duct
to the outdoors or spaces that directly communicate
with the outdoors and shall have a minimum free
area of 1 square inch per 3000 Btu/hr (734 square
mm/kW) of the total input rating of all equipment
located in the enclosure. This opening must not be
less than the sum of the areas of all vent connectors
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3.2 Combustion Air
Boilers and water heaters must have provisions for
combustion and ventilation air in accordance with the
applicable requirements for Combustion Air Supply
and Ventilation in the National Fuel Gas Code, ANSI
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Installation Code, CSA B149.1. All applicable
provisions of local building codes must also be
adhered to.
A Units can take combustion air from the space
in which it is installed, or the combustion air can
be ducted directly to the unit. Ventilation air must
be provided in either case.
3.2.1 Combustion Air From Room
In the United States, the most common requirements
specify that the space shall communicate with the
outdoors in accordance with Method 1 or 2. (See the
following descriptions.) Where ducts are used, they
shall be of the same cross-sectional area as the free
area of the openings to which they connect.
Method 1 : Two permanent openings, one
commencing within 12” (300 mm) of the top and
one commencing within 12” (300 mm) of the bottom,
of the enclosure shall be provided. The openings
Table 5. Ducted Air Accessories
Model 1600 Model 2000 Model 2500 Model 3000 Model 3500 Model 4000
Screen for horizontal galvanized air pipe D2012104 D2012101 D2012101 D2012102 D2012103 D2012103
Screen for horizontal PVC air pipe CA012004 CA012001 CA012001 CA012002 CA012003 CA012003
Screen for horizontal polypropylene air pipe CA012204 CA012201 CA012201 CA012202 CA012203 CA012203
Screen for vertical galvanized air pipe D2012204 D2012201 D2012201 D2012202 D2012203 D2012203
Screen for vertical PVC air pipe CA012404 CA012401 CA012401 CA012402 CA012403 CA012403
Screen for vertical polypropylene air pipe CA012604 CA012601 CA012601 CA012602 CA012603 CA012603
Table 6. Required Combustion Air Pipe Material
Material United States Canada
ABS ANSI/ASTM D1527 The air pipe material must be chosen based upon
the intended application of the boiler or water
heater, and must be installed according to the vent
manufacturer’s installation instructions.
PVC, sch. 40 ANSI/ASTM D1785 or D2665
CPVC, sch. 40 ANSI/ASTM F441
Single wall galv. steel 26 gauge
Polypropylene ULC S636 Class 2C