To Replace Main Burner Orifices | American Dryer Corp ML-145

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.

WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!

To Replace Main Burner Orifices

1.Referto“ToReplaceGasValve”andfollow Step #1 through Step #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. Reversing the removal procedure for reinstalling.

WARNING: Test ALL connections for leaks by brushing on a soapy water solution.

WARNING: 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 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 ADC Part No. 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 (8.7 mb).

L.P. Gas - 10.5 Inches Water Column (26.1 mb).

19

Image 23

American Dryer Corp ML-145, ML-170 To Replace Main Burner Orifices, To Test and Adjust Gas Water Column Pressure

Contents

American Dryer Corporation ML-145 / ML-170 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Section Technical Information Important Information Safety Precautions Standards Cleaning Routine Maintenance Lubrication Adjustments Electrical and GAS Requirements Installation RequirementsENCLOSURE, AIR SUPPLY, and Exhaust Requirements Operational Service Check Procedure Gas 10.5 inches water column 26.1 mb Control BOX Description of PartsControl Panel Microprocessor Control Panel NON-MICROPROCESSOR Drive Motor GAS Burner AssemblyHSI HOT Surface Ignition Module Gas Models only Tumbler Basket Bearing and Pulley Arrangement Idler AssemblyBlower Motor and Impellor GAS and Steam Tumbler Basket Main Door SwitchSail Switch Gas Models only Lint Drawer Automatic Reset ThermostatHI-LIMIT Gas Models only Compressed AIR Requirements Lint Drawer SwitchTemperature Sensor Bracket NON-COMPUTER Steam Damper System To Replace Computer ServicingIntroduction Computer Controls To Replace Microprocessor Temperature Sensor Probe To Replace Keyboard Touchpad Label Assembly To Replace Gas Valve Refer to above burner illustration To Remove Flame Probe AssemblyIgnition Controls To Replace Main Burner Orifices To Test and Adjust Gas Water Column Pressure To Replace Burner Tubes To Convert from Natural Gas to L.P. Gas To Replace Burner Hi-Limit Thermostat Gas Models Only To Replace HSI Hot Surface Ignition ModuleThermostats To Replace Sail Switch Sail Switch Assembly Gas Models only To Replace Main Door Assembly To Adjust Sail Switch To Replace Front Panel To Install New Main Door Glass To Replace Tumbler Basket Pulley To Replace Main Door Hinge BlocksPulleys To Replace Large Idler Pulley To Replace Small Idler Pulley To Replace Motor Pulley Tumbler Basket AssemblyTumbler Basket Alignment Vertical Up and Down Adjustment To Replace Tumbler Basket or Tumbler Basket Support Tumbler Basket Alignment Lateral Side to Side Adjustment Important Never strike the shaft directly with a hammer To Replace Front Idler Shaft Pillow Block Bearing To Replace Front Tumbler Basket Support Pillow Block Bearing Belts Refer to illustrations in section F Pulleys Belt Tension Adjustment Tumbler Basket to IdlerTo Replace Rear Idler Shaft Pillow Block Bearing To Replace Drive Motor Belt Tension Adjustment Motor to IdlerTo Replace V-Belts Motors Impellor To Replace Lint Drawer Switch Lint Drawer Assembly To Replace Lint Screen Computer will not accept keyboard touchpad entries Troubleshooting Display is reading no Airflow Display is reading Rotation Sensor Fail Display is reading No Heat Display is reading Sail Switch FailDisplay is reading Drum Safety Fail Display is reading Burner Safety Fail Display is reading Lint Door Display is reading Burner Control FailureDisplay is reading Burner Flame Failure Display is reading Main Door Thermal overload for drive motor is tripping Display is reading HotDryer operates but is taking too long to dry There is excessive vibration coming from the tumbler basket Overload for impellor fan motor is tripping Electrical Troubleshooting Diagnostic L.E.D. light emitting diode Display Failure Codes Phase 6 OPL System DiagnosticsPage E.D. Display Indicator Number E.D. light emitting diode Display Indicators E.D. Display Indicator Number HT1 Heat Output L.E.D. Indicator FAN Blower Output L.E.D. light emitting diode IndicatorAIR AIR JET Output L.E.D. Indicator Optional Drum Tumbler Basket HI-LIMIT Input L.E.D. Indicator Fuse Main Fuse Input L.E.D. IndicatorLint Lint Door Input L.E.D. Indicator Main Main Door Input L.E.D. Indicator Power Supply Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Display Operating Status D. DISPLAY/CODES Phase 6 OPL Microprocessor L.E.D. Displays ALL REV E.D. Codes 1. Display Codes GAS only Ignition Attempt Failure GAS Models only Power 24 VAC is not Evident AT GAS ValveGAS/ELECTRIC only BURNER/OVEN Open HI-LIMIT Circuit Computer Logic and Wiring Diagram No Display Condition Blower motor does not operate, drive motor runs No Heat Drive and Blower Motors Run Steam Models No Heat Drive and Blower Motors Run Gas Models Door Condition Motor Plate High and LOW Voltage Technical Information Information on the Data Label Data Label How to Use a Manometer Using a Manometer ML-170 Tool List ADC 450429 1- 02/18/00-25