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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. 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 valves.
b. Start dryer. With burner on, the correct water column
reading in inches would be:
Natural Gas – 3.5 inches (8.7 mb) water column.
L.P. Gas – 10.5 inches (26.1 mb) water column.
2. To adjust water column pressure: for natural gas models
remove vent cap. Turn the slotted adjustment screw
located on top of the valve next to the terminals. Turn
clockwise to increase manifold pressure and
counterclockwise to decrease for L.P. gas models there
is no regulator on valve.
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.
12
To Convert from Natural to L.P. Gas
1.
Discontinue electrical power to the dryer. (Both top and
bottom pockets.)
2.
Close all shutoff valves in the dryer gas supply line.
3.
Remove back guard from dryer pocket to be converted.
4.
Loosen and remove the screws that are holding the burner
tube bracket to the cabinet (refer to figure below).
Remove the gas burner tube and bracket from the dryer.
5.
Unscrew main burner orifice and replace with the L.P.
orifice provided.
IMPORTANT: Use extreme care when removing and
replacing the orifice. The orifice is made of brass, which is
easily damaged.
6.
To convert the gas valve for use with L.P. gas, refer to
the instructions included in kit envelope (#92-0737)
supplied.
7.
Reverse procedure for reinstalling the burner tube and
bracket assembly to the dryer.
8.
Beginning with step 3 repeat the procedure for the other
pocket's burner assembly.
9.
Affix L.P. conversion label to the dryer's data label as
per instructions included in this kit.
10. Complete L.P. kit conversion label (ADC Part No. 114083)
and affix this label as close as possible to the dryer's
existing dryer rating (data) label/plate.
11. Affix L.P. conversion rating label (ADC Part No. 114090)
as close as possible to the dryer's existing dryer rating
(data) label/plate.
12. Open all shutoff valves (closed in Step #2), reconnect
electrical power to the dryer, and test for leaks.
NOTE: Never test for leaks with an open flame!!! Use a
soapy water solution or product intended for that purpose.
13. Replace all back guards securely.
American Dryer Corp.
450374 - 1
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