American Dryer Corp AD-95 service manual To Replace Gas Valve See burner illustration on

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To Replace Gas Valve (See burner illustration on page 10)

1.Discontinue power to dryer.

2.Close shut-off valves in gas supply line.

3.Disconnect gas valve wiring.

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 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. NEVER TEST FOR LEAKS WITH A FLAME.

To Replace Main Burner Orifices

1.Refer to "To Replace Gas Valve" and follow steps 1 through 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. Reverse the removal procedure for reinstalling.

NOTE: Test all connections for leaks by brushing on a soapy water solution. 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 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 P/N 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

L.P. Gas - 10.5 Inches Water Column

2.To adjust water column pressure (natural gas only, L.P. gas must be regulated at source):

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Contents AD-95/ML-95 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Troubleshooting Section Safety PrecautionsWeekly CleaningDays MonthsSeven Days after Installation and every 6 Months AdjustmentsLubrication Electrical and Gas Requirements Enclosure, Air Supply, and Exhaust RequirementsOperational Service Check Procedure As of February 11 Prior to February 11 Control Panel MicroprocessorWith fuses With circuit breaker Reversing Relay PanelHSI Module Gas Models Gas Burner AssemblyBlower Motor and Impeller Drive MotorTaperlock Trantorque Drive Shaft Assembly Transtorque Taperlock Idler Shaft AssemblyBasket Tumbler Main Door SwitchHi-Limit Gas Models Only Sail Switch Gas Models OnlyLint Screen Automatic Reset ThermostatLint Drawer Switch Computer Controls ServicingTo Replace Keyboard Label Assembly To Remove Flame Sensor Probe Ignition ControlsHSI Ignitor Flame Sensor Probe To Replace Gas Valve See burner illustration on To Test and Adjust Gas Water Column PressureTo Replace Main Burner Orifices To Replace Burner Tubes To Convert Natural Gas to L.P. GasTo Replace HSI Module Discontinue power to the dryerTo Replace Sail Switch Sail Switch Assembly Gas Models OnlyTo Adjust Sail Switch To Replace Main Door Assembly To Replace Main Door SwitchTo Install New Main Door Glass as of October 24 Front Panel and Main Door AssembliesAs of October 24 Prior to October 24 To Replace Front Panel To Install new Main Door Glass prior of October 24To Replace Main Door Hinge Block To Replace Drive Motor Pulley Pulleys To Replace Drive Shaft PulleyPage Tumbler Wheel Replacement on IdlerAssembly taper lock models To Replace Blower Shaft Pulley Tumbler Wheel Replacement on IdlerAssembly trantorque modelsTo Replace Blower Motor Pulley Basket AssemblyBelt Adjustment Motor to Drive Axle To Replace Drive Assembly Pillow Block BearingTo Replace Idler Shaft Pillow Block Bearing Motors To Replace Drive Motor V-BeltsTo Replace Impeller Motor Fan Shaft Drive To Replace Front Thruster Wheels To Replace Blower Motor V-beltsImpeller Rear AccessTo Replace Lint Door Switch Lint Screen AssemblyTo Replace Lint Screen Computer will not accept key pad entries No display on computerDryer will not start, but computer display indictors are on Drive motor runs, burner is on, but basket will not turnThermal overload for drive motor is tripping Burner hi-limit safety thermostat is trippingOverload for impeller fan motor is tripping There is excessive vibration coming from the basket Phase 6 OPL System Diagnostics Page E.D. Display Indicators E.D Display Indicator Number FAN Blower Output L.E.D. Indicator AIR AIR JET Output L.E.D. Indicator OptionalFuse Main Fuse Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Codes DRUM Safety Fail BURNER Safety FailBURNER Control Fail BURNER Flame FailComputer Logic and Wiring Diagram No Display Condition Blower motor does not operate, drive motor runs Drive motor reverses but does not forward, blower motor runsMain Door Condition Lint Door ConditionMicroprocessor Which Must be Reset Manually For example Technical InformationData Label HOW to USE a Manometer AD-95/ML-95 Tool List ADC450188 1- 01/14/99-25