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ADC AD-95 Service Manual

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AD-95/ML-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
ADC Part No. 450188
072298SL/cj

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  • Page 1 AD-95/ML-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 ADC Part No. 450188 072298SL/cj...
  • Page 2 We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the right to make changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change or discontinue models.

  • Page 3: For Your Safety

    IMPORTANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUST- ING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) STANDARDS.
  • Page 4 WARNING The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY or FIRE COULD RESULT. WARNING DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED. IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation and operator's manual included with the dryer.

  • Page 5: Table Of Contents

    Table of Content SECTION I Important Information ...........................3 A. Safety Precautions ..........................3 SECTION II Maintenance ............................4 A. Cleaning ..............................4 B. Adjustments ............................5 C. Lubrication ............................5 SECTION III Installation Requirements ........................6 A. Enclosure, Air Supply, and Exhaust Requirements ..................6 B. Electrical and Gas Requirements ......................6 C.
  • Page 6 SECTION VI Troubleshooting ..........................38 SECTION VII Phase 6 OPL System Diagnostics ....................... 41 A. Diagnostic (L.E.D. Display) Failure Codes ..................41 B. LED Display Indicators ........................43 C. L.E.D. Codes ............................ 48 D. Computer Logic and Wiring Diagram ....................50 SECTION VIII Technical Information..........................

  • Page 7: Important Information

    The instructions should be posted in a prominent location. 3. Dryer must be exhausted to the outdoors. 4. Although ADC's dryer is a very versatile machine, there are some articles, that due to fabric composition or cleaning method, should not be dried in it.

  • Page 8: Maintenance

    Maximum operating efficiency is dependent upon proper air circulation. The accumulation of lint can restrict this airflow. If the guidelines in this section are met, an ADC dryer will provide many years of efficient, trouble free, and – most importantly – safe operation.

  • Page 9: Adjustments

    WARNING: THE ACCUMULATION OF LINT IN THE EXHAUST DUCT WORK CAN CREATE A POTENTIAL FIRE HAZARD. WARNING: Do not obstruct the flow of combustion and ventilation air. Check customer furnished back draft damper in exhaust duct work. Inspect and remove any lint accumulation which can cause damper to bind or stick.

  • Page 10: Installation Requirements

    A. Enclosure, Air Supply, and Exhaust Requirements NOTE: The following information is very brief and general. For detailed description, refer to the AD-95 Installation Manual supplied with dryer. (ADC P/N 112197) Bulkheads and partitions around the dryer should be made of noncombustible materials. Allowances should be made for the opening and closing of the control door and lint door.

  • Page 11: Operational Service Check Procedure

    Natural Gas - 3.5 to 4 inch water column L.P. Gas - 10.5 to 11 inch water column. 6. If computer program changes are required, refer to the Phase 6 OPL Operator's Manual (ADC P/N 113022) for details. 7. The dryer should be operated through one complete cycle to assure that no further adjustments are neces- sary and that all components are functioning properly.

  • Page 12: Desciption Of Parts

    SECTION IV Description of Parts prior to February 11, 1998 A. Control Panel (Microprocessor) Lifting the control door will reveal the control panel as- sembly. Opening the control panel will allow access to the major components which include the computer board and keypad.

  • Page 13: Reversing Relay Panel

    ...with circuit breaker B. Reversing Relay Panel Lifting the control door will reveal the reversing relay box. Located on the back of the relay box is the revers- ing relay panel. Included on this panel is a four (4) posi- tion terminal block, blower overload, blower contactor, reversing contactor, 24VAC transformer, fuse or circuit breaker, ground lug and an arc suppressor (A.S.) board.

  • Page 14: Hsi Module (For Gas Models Only)

    C. HSI Module (Gas Models Only) The HSI system consists of a microprocessor- based control module, along with a hot surface ignitor probe and a flame probe assembly. The hot surface ignitor is a silicon carbide ignitor that upon application of 24VAC will glow bright orange for the inter-purge time period.

  • Page 15: Drive Motor

    E. Drive Motor The TEFC (totally enclosed, fan-cooled) drive mo- tor is located in the front left corner (viewing from front) behind the front panel of the dryer. It sits on an adjustable base so the motor can be easily adjusted to the left or right, up or down, forward or backward.

  • Page 16: Drive Shaft Assembly

    taperlock trantorque G. Drive Shaft Assembly (Viewing from the front of the dryer.) Behind front panel on the left side of the dryer, you can view the drive shaft assembly which consists of a 9" drive pulley, two (2) 6" wheels, two (2) trantorques, on models manufactured prior to December 15, 1997;...

  • Page 17: Idler Shaft Assembly

    H. Idler Shaft Assembly (Viewing from the front of the dryer.) Behind the front panel on the right side of the dryer you will view the idler shaft assembly which consists of two (2) 6" wheels, two (2) transtorque on models manufactured prior to December 15, 1997;...

  • Page 18: Basket (Tumbler)

    I. Basket (Tumbler) The basket consists of a basket (tumbler) weldment which have four (4) ribs and four (4) removable perforated panels which are mounted to the rib sections of the basket (tumbler) weldment with 1/4-20 x 1/4" socket button head screws. J.

  • Page 19: Sail Switch (For Gas Models Only)

    K. Sail Switch (Gas Models Only) The sail switch is located on the front of the burner box. A sail switch consists of a round damper plate on a lever arm which is in contact with an electric switch. When the fan or air blower comes on, it draws air through the gas burner.

  • Page 20: Automatic Reset Thermostat

    M. Automatic Reset Thermostat This is located inside the dryer in the lint com- partment above the lint screen. This thermostat senses the heated air after it passes through the basket. If the air temperature gets too hot, the thermostat will shut off the burner. The dryer will not run until the air temperature cools down.

  • Page 21: Lint Drawer Switch

    O. Lint Drawer Switch The lint door switch is located in the lint compartment and at- tached to the side of the lint coupe. The lint door switch ensures that the dryer will operate only when the lint door is completely closed.

  • Page 22: Servicing

    SECTION V Servicing Introduction ALL electrical and mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off). WARNING: PERSONAL INJURY COULD RESULT The information provided in this section should not be misconstrued as a device for use by an untrained person making repairs.
  • Page 23 5. Disconnect the two (2) orange wires from the high heat (225º F) thermostat, and remove modular bracket connector, wires, and probe from bracket assembly. 6. Install new sensor probe assembly (ADC P/N 811710) by reversing procedure. 7. Reestablish power to the dryer.

  • Page 24: Ignition Controls

    B. Ignition Controls To Remove Hot Surface Ignitor (see burner illustration on page 10) 1. Discontinue power to dryer. 2. Disconnect wire from S1 and GND on the HSI module. 3. Disassemble ignitor from burner by removing the one (1) self tapping screw. 4.
  • Page 25 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.
  • Page 26 a. Remove the slotted vent cap on the top of the valve. b. Turn the slotted adjustment screw located on the top of the valve next to the terminals. Turn clockwise to increase manifold pressure and counterclockwise to decrease. NOTE: If correct W.C.

  • Page 27: Thermostats

    To Replace HSI Module 1. Discontinue power to the dryer. 2. Remove the wires connected to the terminal strip at the bottom of the module. (Mark correct location of each wire to aid in replacement on new module.) 3. Remove the four (4) pal nuts securing the module to the mounting bracket.

  • Page 28: Sail Switch Assembly (For Gas Models Only)

    4. Remove bracket assembly by slightly sliding bracket toward the rear of the dryer and to the left. 5. Disconnect sensor bracket harness connector and remove bracket assembly from dryer. 6. Disconnect the two (2) orange wires from the thermostat. 7.

  • Page 29: Front Panel And Main Door Assemblies

    CAUTION: Do not abort this switch by taping or screwing sail switch damper to burner. PERSONAL INJURY OR FIRE COULD RESULT. E. Front Panel and Main Door Assemblies To Replace Main Door Switch 1. Discontinue power to dryer. 2. Open main door. 3.
  • Page 30 IMPORTANT: Do not press hard or silicone thickness between the glass and door will be reduced, resulting in poor bonding. 6. The door assembly should now be put in an area where it will not be disturbed for at least 24 hours. Depending on the conditions, the curing time of this adhesive is 24 to 36 hours.
  • Page 31 3. Remove glass and clean all old sealant off main door. This area must be completely clean for correct bonding. 4. Apply a narrow bead of silicone (ADC P/N 170730) all around main door area where glass will rest. 5. Install glass onto door and adhesive. Slightly press glass into place.

  • Page 32: Pulleys

    5. Reestablish power to dryer. F. Pulleys To Replace Drive Shaft Pulley 1. Discontinue power to dryer. 2. Remove front panel from dryer (Follow front replacement directions on page 27.) 3. Loosen v-belts. Rotate pulley and roll v-belts out of grooves. 4.
  • Page 33 10. Remove the pulley and key. NOTE: A gear pulley may be required to remove the pulley. 11. Remove cap screws from bushing. 12. Insert cap screws in the tapped removal holes and tighten evenly until bushing becomes loose on shaft. 13.
  • Page 34 NOTE: One wrench must be on the transtorque and one on the axle. The wrench on the transtorque should have pressure applied in a counterclockwise direction. 12. Remove the bushing trantorque and tumbler wheel. 13. Reverse these procedures for replacement. Tumbler Wheel Replacement on Idler Assembly (taper lock models) 1.
  • Page 35 IMPORTANT: Tighten screws evenly and progressively. Never allow the sheave to be drawn in contact with the flange of the bushing. This gap should measure from 1/8" to 1/4". Proper cap screw torque is 30 ft-lbs. If greater tightening forces are applied, excess pressures will be created in the hub of the mounted sheave which may cause it to crack.

  • Page 36: Basket Assembly

    IMPORTANT: Tighten screws evenly and progressively. Never allow the sheave to be drawn in contact with the flange of the bushing. This gap should measure from 1/8" to 1/4". Proper cap screw torque is 30 ft-lbs. If greater tightening forces are applied, excess pressures will be created in the hub of the mounted sheave which may cause it to crack.

  • Page 37: Bearings

    4. Place a level on the shafts to verify if level. 5. Measure distance between basket and wrapper 1/2" to 3/4" gap should be derived. 6. Loosen the 8 bolts on the pillow block bearings and turn the adjustment screw clockwise or counterclock- wise to increase or decrease the gap between the basket and wrapper.

  • Page 38: V-Belts

    8. Retighten motor mount bolts and jam nuts. 9. Assemble front panel lint door assemblies back to dryer. 10. Reestablish power to dryer. To Replace Drive Motor V-Belts 1. Discontinue power to the dryer. 2. Remove front panel. Follow front panel replacement instructions on page 27. 3.
  • Page 39 5. Loosen the tension on the blower motor v-belts by loosening the jam nuts and then the adjustment bolt. 6. Remove the bolts securing the motor mount assembly to the dryer cabinet and remove the motor mount assembly from the dryer. NOTE: The motor mount assembly will not be able to be removed to far due the wiring harness still connected.

  • Page 40: Impellor

    2. Remove the front panel. Follow front panel removal instructions on page 27 for removal. 3. Remove thruster wheel assembly. 4. Remove the wheel from thruster wheel bracket. 5. Reverse steps 1 through 5 for installing the new thruster wheel. To Replace Rear Thruster Wheels on Bolted Brackets Front Access 1.

  • Page 41: Lint Drawer Assembly

    5. Remove the four (4) nuts mounting the impeller assembly to the blower housing. 6. Remove the two (2) set screws and two (2) left hand jam nuts that hold the impeller on the shaft. 7. Remove the impeller, washers and key. 8.

  • Page 42: Troubleshooting

    SECTION VI Troubleshooting The information provided will help isolate the most probable components associated with the difficulty described. The experienced technician realizes that a loose connection or broken or shorted wire may be at fault where electrical components are concerned -- not necessarily the suspected component itself. ELECTRICAL PARTS SHOULD ALWAYS BE CHECKED FOR FAILURE BEFORE BEING RE- TURNED TO THE FACTORY.
  • Page 43 C. Restriction in exhaust system. D. Insufficient makeup air. E. Poor housekeeping. Dirty or clogged lint screen. F. Washing machine extractors are not performing properly. G. An exceptionally cold/humid or low barometric pressure atmosphere. H. The supply gas may have a low heating valve, check with local gas supplier. I.
  • Page 44 C. Open circuit in either one of two (2) wires leading from the sensor probe to the computer 1. Connection at sensor bracket assembly connector. 2. Connection at computer harness connector. D. Faulty microprocessor (computer) controller. 13. Dryer does not start. Display reads "main door" or "lint door" with an audio indication. A.

  • Page 45: Phase 6 Opl System Diagnostics

    SECTION VII PHASE 6 OPL SYSTEM DIAGNOSTICS IMPORTANT: You must disconnect and lock out electric, gas or steam supply before any covers or guards are removed from the machine to allow access for cleaning, adjusting, installation or testing of any equipment per OSHA (Occupational Safety and Health Administration) standards.
  • Page 46 7. bURNER FLAME FAIL- This routine allows two (2) Flame out retries to occur before proceeding into the error. The count of two (2) will be established every time the call for heat was to occur. Only if it reaches the count of two (2) before the tumbler temperature has reached the set temperature will this error be triggered.

  • Page 47: Led Display Indicators

    NOTE: RPM- This routine monitors the timing response from the existing rotational sensor input and derives a RPM measurement. To display this RPM measurement (press the "ENTER/START" key once and release, then press the "ENTER/START" key a second time and hold. This will display the RPM measurement).
  • Page 48 5. L.E.D DISPLAY INDICATOR NUMBER 5 a. Air Jet Circuit - OPTIONAL 1.This indicator dot is on at the end of the dryer cycle for approximately 60 seconds. C. PHASE 6 OPL MICROPROCESSOR CONTROLLER RELAY OUTPUT L.E.D. INDICATORS There are a series of five (5) L.E.D. indicators (ORANGE LIGHTS) located at the backside are of the Phase 6 OPL microprocessor controller (computer).
  • Page 49 1. "FAN" (BLOWER) Output L.E.D. Indicator A. If the dryer is started and the blower motor is not operating, yet the Phase 6 OPL microprocessor controller (computer) display fan indicator dot and power supply input L.E.D. are on, but the fan output L.E.D.
  • Page 50 6. "FUSE" (MAIN FUSE) Input L.E.D. Indicator A. Should be on ALL the time (even if the dryer is not running.) If the L.E.D. is not on; then the display will read "CHECK MAIN FUSE." If the main fuse is good then the fault is on the Phase 6 microprocessor controller (computer).
  • Page 51 12. "FLAME" (bURNER CONTROL FAIL) Input L.E.D. Indicator A. This routine monitors the ignition control's gas valve output response. If the valve output signal is not present from the ignition control within the valve time limits the microprocessor determines the ignition control has failed.

  • Page 52: Codes

    C. L.E.D. CODES 1. Display Codes SLOPE FACTOR ALL REV ALWAYS REVERSING ANTI WRINKL dELAY TIME ANTI-WRINKLE DELAY TIME ANTI WRINKL GUARd ACTIVE ANTI-WRINKLE PROGRAM ACTIVE ANTI WRINKL GUARd ON TIME ANTI-WRINKLE GUARD ON TIME AUTO CYCLE AUTOMATIC MODE HEAT LOSS (OFF SET) FACTOR bURNER CONTROL FAIL GAS ONLY POWER (24VAC) IS NOT EVIDENT AT GAS VALVE bURNER FLAME FAIL...
  • Page 53 2. FAULT CODES bURNER CONTROL FAIL - GAS MODELS ONLY POWER (24VAC) IS NOT EVIDENT AT GAS VALVE bURNER FLAME FAIL - The Phase 6 Microprocessor Controller (computer) DOES NOT SENSE FLAME VERIFICA- TION (GAS MODEL ONLY) bURNER SAFETY FAIL - GAS/ELECTRIC ONLY BURNER/OVEN OPEN HI-LIMIT CIRCUIT dRUM SAFETY FAIL - Fault in the TUMBLER HI-LIMIT CIRCUIT...

  • Page 54: Computer Logic And Wiring Diagram

    If your particular diagram is lost or unreadable, call ADC with the serial number of the dryer. ADC...
  • Page 55 1. No Display Condition A. Check position of emergency stop to verify it is in operating position (pull or twist for operating position). Check fuse one or two and if either are blown, replace C. Take voltage reading across the microprocessor (J7) 9-pin connector pins 1 and 2. If no voltage is present at pins 1 and 2, double check the secondary (24VAC) side of transformer at the blower motor contactor number 13 to ground if no voltage is present check primary voltage to trans- former.
  • Page 56 2. Drive motor reverses but does not forward, blower motor runs A. If computer dot (first dot on the left) does not come on replace the computer. B. Check for voltage across the coil of the forward contactor located in the reversing panel box. The contactor according to your diagram is marked CR2.
  • Page 57 If there is voltage present at the two BS1 terminals, the problem is bad wires or terminations between the two BS1 terminals and the coil (A1 and A2) terminals. If there is no voltage across the two BS1 terminals, check for voltage across the two AS1 termi- nals.
  • Page 58 8. Microprocessor A. Replace the temperature sensor underneath the basket on a bracket (the bullet shaped device). B. If it still read "TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE, "unplug J3 4-pin connec- tor from the temperature sensor bracket. Also, unplug the microprocessor J14 4-pin connector from the computer board.
  • Page 59 The location of the manual reset hi-limit switch is on the right side of the burner box. IMPORTANT HEATING UNIT IS EQUIPPED WITH A HI-LIMIT THERMOSTAT WHICH MUST BE RESET MANUALLY. WARNING - DISCONTINUE POWER TO DRYER BEFORE ATTEMPTING TO RESET HI-LIMIT. ADC P/N: 114076...

  • Page 60: Technical Information

    SECTION VIII Technical Information The following section contains various technical information important to the service person in servicing and maintaining the dryer. A. MOTOR PLATE (HIGH AND LOW VOLTAGE) The motor plate is located on the side of the drive motor (see illustration) and contains a graphical repre- sentation of the motor wiring for both low and high voltage ratings.

  • Page 61: Data Label

    When contacting ADC, please have the model number and serial numbers readily accessible. Information on the Data Label A. Model number - The model number is an ADC number which describes the size of the dryer and the type of heat (gas or steam).

  • Page 62: Using A Manometer

    C. HOW TO USE A MANOMETER 1. With dryer in nonoperating mode, remove plug on the gas valve pressure tap. 2. Attach plastic tubing to pressure tap. Fitting is supplied with manometer (see illustration). 3. Attach manometer to dryer using magnet. NOTE: Place manometer in a position so that readings can be taken at eye level.

  • Page 63: Tool List

    12" Pipe Wrench (2) 1/8" "T" Shaped or "L" Shaped Allen Wrench 3/16" "T" Shaped or "L" Shaped Allen Wrench Wire Cutters 1/2" Allen Wrench 3/8" Allen Wrench Channel Locks Manometer (ADC P/N 122804) MP Pin Extraction Tool (ADC P/N 122800)
  • Page 64 ADC 450188 1- 01/14/99-25 2- 09/15/99-25...

This manual is also suitable for:

Ml-95

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