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NOTE: Identify location of each wire for correct reinstallation.
4. Break union connection before gas valve.
5. Loosen and remove four (4) screws securing pipe brackets to burner.
6. Remove gas valve and manifold assembly from dryer.
7. Remove valve mounting bracket, manifold, and piping from gas valve.
8. Reverse procedure for installing new gas valve.
WARNING: Test ALL connections for leaks by brushing on a soapy water solution.
WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!
To Replace Main Burner Orifices
1. Refer to “To Replace Gas Valve” and follow Step #1 through Step #6.
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. Reversing the removal procedure for reinstalling.
WARNING: Test ALL connections for leaks by brushing on a soapy water solution.
WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!
To Test and Adjust Gas (Water Column) Pressure
There are two (2) types of devices commonly used to measure water column pressure. They are spring and
mechanical-type gauges and manometers. The spring and 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 ADC Part No. 122804.
1. To Test Gas Water Column (W.C.) Pressure:
a. Connect water column test gauge connection to gas valve pressure tap (1/8” NPT). 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 - 3.5 Inches Water Column (8.7 mb).
L.P. Gas - 10.5 Inches Water Column (26.1 mb).