Combustion Air Supply - Bradford White ULG275H763N-475 Installation/Operation Instruction Manual

Gas-fired water heater
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Venting continued-
This water heater must be connected to a lined masonry chimney or venting
system approved by local codes or ordinances. The vent connector used to
attach the draft diverter outlet to the chimney or approved vent must be of the
same diameter as the draft diverter outlet or larger. For proper venting in
certain installations, a larger vent connector may be needed. Consult venting
tables in ANSI standard (Z223.1-or latest edition), National Fuel Gas Code
and CAN/CGA (B149.1 or B149.2-latest editions) Natural Gas and Propane
Installation Code, or local code officials for proper application for your area.

Combustion Air Supply

Liquefied petroleum gases/propane gases are heavier than air and will
remain at floor level if there is a leak. Basements, crawl spaces, closets
and areas below ground level will serve as pockets for accumulation of
leaking gas. Before lighting, smell all around the appliance area for gas.
Be sure to smell next to the floor.
IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electric switch; do not use any telephone in your
building.
Immediately call your gas supplier from a neighbor's telephone.
Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE APPLIANCE UNTIL LEAKAGE IS CORRECTED!
The flow of combustion and ventilating air must not be obstructed.
Provide adequate air for combustion and ventilation. An insufficient
supply of air will cause recirculation of combustion products resulting in
air contamination that may be hazardous to life. Such a condition often
will result in a yellow, luminous burner flame, causing carboning or
sooting of the combustion chamber, burners and flue tubes with possible
damage to the water heater. When an exhaust fan is installed in the
same room with a water heater, sufficient openings for air must be
provided in the walls. Undersized openings will cause air to be drawn
into the room through the chimney, causing recirculation of combustion
products.
Confined Spaces
Confined spaces are spaces defined as having less than 50 ft.
3
(1.41m
/.29kw) per hour.
WARNING
IMPORTANT
10
3
/1000 BTU

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