American Dryer Corp AD-95 service manual

American Dryer Corporation

88 Currant Road

Fall River, MA 02720-4781

Telephone: (508) 678-9000 / Fax: (508) 678-9447

E-mail: techsupport@amdry.com

072298SL/cj ADC Part No. 450188

AD-95/ML-95

Service Manual

Contents

Main Retain This Manual In A Safe Place For Future Reference Important Page Page Table of Content SECTION I SECTION II SECTION III SECTION IV Page 3 SECTION I Important Information A. Safety Precautions A. Cleaning SECTION II Routine Maintenance B. Adjustments C. Lubrication 6 A. Enclosure, Air Supply, and Exhaust Requirements B. Electrical and Gas Requirements SECTION III Installation Requirements C. Operational Service Check Procedure SECTION IV Description of Parts Page D. Gas Burner Assembly C. HSI Module (Gas Models Only) E. Drive Motor F. Blower Motor and Impeller Page Page Page K. Sail Switch (Gas Models Only) L. Hi-Limit (Gas Models Only) M. Automatic Reset Thermostat N. Lint Screen Page SECTION V Servicing Introduction A. Computer Controls To Replace Input/Output Board Reversing (Prior to February 11, 1998) To Replace Display Board To Replace Keyboard Label Assembly To Replace Microprocessor Temperature Sensor Probe Page To Replace Gas Valve (See burner illustration on page 10) To Replace Main Burner Orifices To Test and Adjust Gas (Water Column) Pressure 22 To Convert Natural Gas to L.P. Gas To Replace Burner Tubes 23 To Replace HSI Module C. Thermostats To Replace Burner Hi-Limit Thermostat (Gas Models Only) To Replace Lint Compartment Hi-Heat Protector (225) Thermostat To Replace Sail Switch To Adjust Sail Switch D. Sail Switch Assembly (Gas Models Only) E. Front Panel and Main Door Assemblies To Replace Main Door Switch To Replace Main Door Assembly Page To Install new Main Door Glass prior of October 24, 1997 To Replace Front Panel To Replace Main Door Hinge Block F. Pulleys To Replace Drive Shaft Pulley To Replace Drive Motor Pulley Tumbler Wheel Replacement on Drive Assembly (taper lock models) 29 NOTE: A gear pulley may be required to remove the pulley. Tumbler Wheel Replacement on Drive Assembly (transtorque models) Tumbler Wheel Replacement on Idler Assembly (taper lock models) Tumbler Wheel Replacement on Idler Assembly (trantorque models) To Replace Blower Shaft Pulley To Replace Blower Motor Pulley Basket Assembly To Replace Idler Shaft Pillow Block Bearing To Replace Drive Assembly Pillow Block Bearing V-belt Adjustment (Motor to Drive Axle) 34 To Replace Drive Motor V-Belts J. Motors To Replace Drive Motor To Replace Impeller Motor (Fan Shaft Drive) To Replace Blower Motor V-belts To Replace Front Thruster Wheels To Replace Rear Thruster Wheels on Bolted Brackets Front Access Rear Access To Replace Rear Thruster Wheels on Welded Thruster Wheel Bracket Models K. Impeller L. Lint Screen Assembly To Replace Lint Screen To Replace Lint Door Switch 38 SECTION VI Troubleshooting Page Page SECTION VII PHASE 6 OPL SYSTEM DIAGNOSTICS Page 43 B. L.E.D. DISPLAY INDICATORS Page 45 3. "REV" (REVERSE) Output L.E.D. Indicator (for optional reversing models only) 4. "AIR" (AIR JET) Output L.E.D. Indicator - OPTIONAL 5. "HT1" (HEAT) Output L.E.D. Indicator Page Page Page Page D. Computer Logic and Wiring Diagram 1. No Display Condition 52 2. Drive motor reverses but does not forward, blower motor runs 3. Drive motor works in forward mode but does not reverse, blower motor runs 4. Blower motor does not operate, drive motor runs 5. Lint Door Condition 6. Main Door Condition 7. "No Heat" drive and blower motors run, display reads normal (gas models). 8. Microprocessor Page SECTION VIII Technical Information Page Page 59 D. AD-95/ML-95 TOOL LIST