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To Replace Main Burner Orifices
1. Refer to "Removing Burner Tube Assembly".
2. Unscrew main burner orifices and replace.
NOTE: Use extreme care when removing and replacing orifices. These orifices are made of brass
and are easily damaged.
3. Reverse the removal procedure for reinstallation.
NOTE: Test all connections for leaks by brushing on a soapy water solution. NEVER TEST FOR
LEAKS WITH A FLAME.
To Test and Adjust Gas (Water Column) Pressure
There are two types of devices commonly used to measure water column pressure. They are spring/mechanical-
type gauges and manometers. The spring/mechanical-type gauge is not recommended, because it is easily damaged
and not always accurate. A manometer is simply a glass or transparent plastic tube with a scale in inches. When
filled with water and pressure applied, the water in the tube rises showing the exact water column pressure.
NOTE: Manometers are available from the factory by ordering P/N 122804.
1. To test gas water column pressure:
a. Connect water column test gauge connection to
gas valve pressure tap (1/8" N.P.T.). This pressure
tap is located on the outlet (manifold) side of the
valve.
b. Start dryer. With burner on, the correct water
column reading in inches would be:
Natural Gas – 3.0 inches (6.9 mb) water column.
L.P. Gas – 10.5 inches (26.1 mb) water column.
2. To adjust water column pressure (natural gas only, L.P.
gas must be regulated at source):
a. Remove the brass vent cap on the top of the valve.
b. Turn the slotted adjustment screw located under
the brass vent cap at the top of the valve. Turn
clockwise to increase manifold pressure and
counterclockwise to decrease.
NOTE: If correct water column pressure cannot
be achieved, problem may be due to an
undersized gas supply line, a faulty or
underrated gas meter, etc.
450364 - 1
Maytag Co.
17
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