Maytag MLG33 Gas Pressure Testing, Preparation for Operation/Start-Up, Gas Pressure Adjustment

Reinstall the burner tube onto the burner base.

If converting from unregulated gas, use a flat screwdriver, remove the cap with blocking pin and install the regulator vent cap from the kit.

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. 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 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.

To adjust gas valve’s internal regulator, remove the regulator cover screw 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 1 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, it must be sealed to prevent maladjustment by the user with, for example, paint.

Edge #1 for vent cap

Edge #2 for adjustment screw

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 Maytag Co.

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 mb. 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.

CE: Back out miniature screw inside pressure tap and attach manometer (refer to the illustration on page 16).

Non-CE: Install pressure tap and attach manometer (refer to illustration on page 16).

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.

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.”

Preparation for Operation/Start-Up ___

The following items should be checked before attempting to operate the dryer:

•Read all “CAUTION,” “WARNING,” and “DIRECTION” labels attached to the dryer.

•Check incoming supply voltage to be sure that it is the same as indicated on the data label. In the case of

208 VAC or 240 VAC, the supply voltage must match the electric service exactly.

•GAS MODELS – Check to ensure that the dryer is connected to the type of heat/gas indicated on the dryer data label.

•GAS MODELS – Be sure that all gas shutoff valves are in the open position.

•Be sure all back panels (guards) and electric box covers are in place.

•Be sure the service doors are closed and securely in place.

•Be sure the lint door/drawer is securely in place.

•Rotate the tumbler (drum) by hand to be sure it moves freely.

•Check bolts, nuts, screws, terminals, and fittings for tightness and security.

•Check that the vent is connected to the dryer and is exhausted to the outdoors.

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