Reliant FVIR GAS WATER HEATER Technical Information PDF herunterladen (Seite 10)

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

TROUBLESHOOTING and SERVICE HANDBOOK

RELIANCE Water Heater Company Technical Training Department

Service:

Air: A gas burning appliance requires the oxygen contained in 12.5 cubic feet of air (at sea level)

for every 1000 BTU of heat that is generated. If your water heater has a BTU per hour input of

40,000 BTU then a minimum of 500 (40 times 12.5) cubic feet of clean air must be available. This

oxygen will mix with the gas for a clean, blue flame in the burner chamber and provide dilution air

for flue products.

Do not forget that your gas (or oil) furnace and gas clothes dryer also require a like amount of air.

When calculating air supply provisions, also consider the presence of whole house exhaust fans

or other exhaust fans competing for the same air supply.

Air must be allowed to enter the heater chamber from the base of the heater and also enter the

flue vent from below the draft hood. Do not block these areas with insulation blankets or

obstructions lying around the base of the heater.

Lack of Oxygen: If a sufficient supply of oxygen (air) is not available for combustion and

dilution, the result will be:

Pilot outage

Yellow burner flame

Sooting water heater

Possible carbon monoxide

Smell of burnt gas in the room

Residential Gas – continued

12.5

Cubic

Feet of

Air

1,000

BTU

Fuel

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Reliant FVIR GAS WATER HEATER Technical Information Seite 10