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Connect the union and the three electrical plugs.
Repeat these steps for the other burner.
Open all shutoff valves, reconnect electrical power to the dryer,
and test for leaks.
Operate the dryer through one complete cycle to ensure proper
operation.
With dryer operating, check the manifold (burner) pressure
at the tap on the gas valve to ensure proper operating pressure
(refer to chart on page 13).
Gas Pressure Adjustment
Disconnect electrical power to the dryer.
IMPORTANT: The following procedures must be performed
on both top and bottom tumblers.
To adjust gas valve's internal regulator, remove the regulator
vent cap with the regulator adjustment tool, which is located
on the back guard between the gas inlet and exhaust outlet
(refer to the illustration below for proper use of adjustment
tool). Be sure to use one of the wide ends of the adjustment
tool for removal of the vent cap. Once vent cap is removed,
the narrow end of the adjustment tool can be used to turn the
plastic adjustment screw in the valve. Turn the screw
clockwise to raise pressure and counterclockwise to lower
pressure.
Gas (burner) pressures are measured with the burner in
operation for all burner adjustment conditions. Therefore
once the necessary adjustments have been made, the dryer
must be operated in a heating cycle to verify that the pressure
is correct. If it is not correct, you must discontinue the power
to the unit and make further adjustments. Repeat these steps
as many times as necessary to achieve the correct burner
pressure. Once the adjustment of the valve is complete, the
vent cap must be replaced and sealed with, for example,
paint to prevent maladjustment by the user.
Warning (CE Dryers)
!
This appliance must only be operated with the
gas type indicated on the dryer's data plate. If
the appliance is converted (gas type changed), a data
plate amendment must be obtained from American Dryer
Corporation.
Conversions done improperly can result in a fire or
explosion!
16
Edge #1 for vent cap
Edge #2 for adjustment screw
American Dryer Corp.
Gas Pressure Testing _________________
For proper operation, the gas pressure must be correct,
consistent and maintained at the gas pressure rates shown
on page 13. Provisions are made at the gas valve for taking
gas pressure readings.
There are two types of devices used to measure gas pressure.
They are the spring/mechanical type gauge and the
manometer. The use of the spring/mechanical type gauge is
not recommended because they are very easily damaged
and are not always accurate. The preferred type of gauge is
the manometer because it is a simple device to use and is
highly accurate. A manometer is simply a glass or transparent
plastic tube with a scale graduated in inches or millibars.
When it is filled with water and pressure is applied, the water
in the tube rises, showing the exact gas pressure.
Gas Pressure Test Procedure
Turn gas cock in gas supply line to "OFF" position.
50 Hz dryers: Back out miniature screw inside pressure tap
and attach manometer (refer to the illustration on page 15).
60 Hz dryers: Install pressure tap and attach manometer (refer
to the illustration on page 15).
Turn gas cock to "ON" position.
Start the dryer in Heat Mode and wait for ignition. Gas manifold
pressure should be as shown on page 13.
If the gas pressure needs to be adjusted, refer to "Gas
Pressure Adjustment" on this page.
Once test is complete, turn gas cock to "OFF" position.
Remove manometer. Tighten screw inside the pressure tap
or install plug.
Turn gas cock to "ON" position and check for leaks with soap
solution with main burner "ON."
Steam Information ____________________
It is your responsibility to have all plumbing connections made
by a qualified professional to ensure that the steam plumbing
installation is adequate and conforms with local, state, and
country regulations or codes.
Care must be exercised when leveling steam dryers into final
position. After leveling the dryer, check the downward pitch of
the heat exchanger from front to rear with a level. Likewise,
check the downward pitch of the return condensate manifold
toward its outlet part. Absence of these downward pitches
will result in probable water hammer and premature heat
exchanger fracture and leakage.
The presence of condensate in the steam will cause water
hammer and subsequent heat exchanger failure. The steam
supply connection must be taken from the top of a well-
dripped steam main. If the supply run-out to the dryer exceeds
25 feet (7.6 meters), it should be dripped just before the control
valve with a proper trap and dirt pocket.
IMPORTANT: Failure to comply with the requirements
stipulated in this manual can result in component failure,
which will void the warranty.
112809 - 6
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