Specifications

Flame Guard® Water Heaters

Spills of gasoline or the presence of other ammable va-

pors near a standard gas water heater can be very dan-

gerous. The American Naonal Standards Instute (ANSI)

now requires all residenal water heaters to be amma-

ble vapor ignion resistant (FVIR). All American Flame

Guard® Water Heaters are fully compliant with ANSI

FVIR standards.

Flame Guard® water heaters have a sealed combuson

chamber. Combuson air and ammable vapors can only

enter through a specially designed ame trap. The ame

trap is located in the boom of the combuson chamber,

under the main burner and pilot ame. If ammable

vapors are present, the pilot or main burner immediately

ignites them inside the combuson chamber. The vapors

burn on top of the ame trap and are prevented from

escaping back into the room. When the vapors become

too rich or too lean to burn, they snu themselves out.

A second part of the ANSI Standard concerns resistance

to lint, dust, and other debris build- up on the ame trap.

If the ame trap were to become clogged, combuson air

would be reduced, starving the burner of oxygen. This

may increase the amount of carbon monoxide and create

a health hazard. Flame Guard® water heaters are

designed to reduce lint build-up. The small pressure wave

created by lighng the burner during normal operaon

helps blow accumulated lint o the ame trap. If lint does

build up, the thermal cuto switch will shut down the

heater, so the ame trap and the lter may be cleaned.

Gas Water Heater Operation