Atwood Mobile Products Water Heater Water Heater Exchanger User Manual

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10
Pilot and Main Burner
Pilot Adjustment
Only the gas pressure, gas valve and the pilot orifice regulate the height of the pilot flame. Early model gas
controls have a pilot adjustment screw, but this screw has very little effect on the pilot. The pilot
adjustment has been removed from the current White Rodger control. The flame should be high enough to
engulf the thermocouple at all times. A pilot flame any larger could blow the E.C.O. in the gas control. This
is typically the result of enlarging the pilot orifice hole with a pin or similar item. For further corrective
measures, refer to the trouble-shooting guide.
Main Burner Adjustment
The gas pressure, air shutter cleanliness of the burner tube and orifice regulate the main burner flame. The
main burner flame should be mainly blue with a trace of yellow and fairly quiet. If it is not, adjust the gas
pressure to 11˝ W.C., ensure that the main burner air shutter is 1/4 way open and verify that the main
burner flame spreader is square to the end of the main burner. For further corrective measures, refer to the
trouble-shooting guide.
Main Burner Alignment
The manifold and main burner should be as perfectly aligned as possible. In other words, the gas valve
should be rotated at the same angle as the main burner tube. If it is not, rotate the gas control and/or the
orifice holder so that the orifice disperses gas straight down the center of the burner tube. If the valve must
be backed off any, check for water leaks at the coupling the control screws into before you operate the
water heater.
Pilot Flame
Thermocouple
On/Off Pilot Knob
Air Shutter
Temperature Lever
Flame Spreader
Burner Tube
Gas Valve
Orifice Holder
Main Burner Tube
(orientation found in water heater)

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