Combustion Air Supply - Bradford White RG2DVMH40T6X-264 Manual

Combustion Air Supply

All combustion air must be supplied from outdoors by one of the following
installation methods and as illustrated in Figure 5. 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.
AIR INTAKE INSTALLATION - 3" (7.6cm) diameter telescoping air intake and
leg enclosure are required to supply fresh air to the water heater. Note: When
a mobile home is tightly skirted, an air inlet opening in the skirting must
2
be provided. The opening must have a minimum free area of at least 9 in
2
(22.9cm ). If the opening is screened or covered with a louver, the total
2 2
free area must be at least 9 in (22.9cm ). The following steps must be
followed for proper installation of these air supply components: (Refer to Figure
5).
10