Gas Pressure Testing - ADC HB50 Installation & Operator's Manual

• Converting from regulated L.P. to regulated natural
gas: remove the white plastic regulator adjustment
screw (under vent cap). Remove spring under screw
and replace with spring from kit (ADC P/N 140415).
Replace regulator adjustment screw.
Install the gas train back into the dryer gas train enclosure.
Be sure the tab at the rear of the gas train engages into the
mounting slot.
Connect the union and the 3 electrical plugs.
Open all shutoff valves, reconnect electrical power to the
dryer, and test for leaks.
Operate the dryer through 1 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 14).
Gas Pressure Adjustment
Disconnect electrical power to the dryer.
IMPORTANT: It is required that the following procedures
be performed on both burner assemblies.
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. Refer to "Gas Pressure Testing" on this page. 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.
113014 - 14
Edge #1 for vent cap
Edge #2 for adjustment screw
www.adclaundry.com
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!

Gas Pressure Testing _________________

For proper operation, the gas pressure must be correct,
consistent and maintained at the gas pressure rates shown
on page 14. Provisions are made at the gas valve for taking
gas pressure readings.
There are 2 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 millibar. 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.
60 Hz dryers: Install pressure tap and attach manometer.
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 14.
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."
17