Bradford White M-I-MH40T6FLX - Manual (Page 10)

Internet Version For Reference Only
Combustion Air Supply
WARNING
Liquefied petroleum gases/propane gas 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!
All combustion air must be supplied from outdoors by one of the following
installation methods and as illustrated in Figure 4. The flow of combustion
and ventilating air must not be obstructed. Adequate air must be supplied 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 heater.
IMPORTANT
The flow of combustion and ventilating air must not be obstructed.
INSTALLATION A - A minimum 34 in
2 (86.4cm 2 ) opening area is required to
supply fresh air to the water heater for combustion. Cut a 4” x 8 1/2” (10.2cm
x 21.6cm) rectangular opening in the outside access door panel with the
bottom side of the opening being 6” (15.3cm) from the bottom access door
panel. A 1/4” (6.35mm) minimum mesh screen is suggested protection to
cover this fresh air opening.
INSTALLATION B - A minimum of a 20 in
2 (51cm 2 ) opening area is required
to supply fresh air to the water heater. Cut 5” (12.7cm) diameter hole through
the floor and all other layers of flooring and sheathing of the mobile home
directly beneath the center of the water heater. A 1/4” (6.35mm) minimum
mesh screen is suggested protection
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