American Dryer Corp. AD-400 User Manual
Page 48
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Once this differential gauge is installed, open the main gas shut-off valve and push the
test/reset button on the burner controller module so that the button springs out.
4. Restart the dryer. The ignition process should now continue to the hi-fire gas flow state. The
differential gauge should read 2.2 inches water colunm for natural gas and .9 inches water
column for L.P. gas. This pressure can be adjusted in the following manner:
1. Main Pressure Regulator
Remove the cap of the regulator and turn the adjustment screw clockwise to increase
the pressure or counterclockwise to decrease the pressure.
2. Manual Butterfly Valve
Loosen the locking screw on the adjusting dial on the valve. Turn the dial clockwise
to increase gas flow and coimterclockwise to decrease gas flow.
The lo-fire flame is set by the motorized butterfly valve. Lo-fire should be set at a
minimum so that all of the ports on the burner box floor have a flame approximately
3/4 inches high.
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