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ADC AD-81 Service Manual

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AD-81
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
www.amdry.com
012802ASILVA/mcronan
ADC Part No. 450189

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  • Page 1 AD-81 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 www.amdry.com 012802ASILVA/mcronan ADC Part No. 450189...
  • 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, ADJUSTING, INSTALLATION, OR TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) STANDARDS.
  • Page 4 WARNING DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER OR SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED. IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and specified in the installation manual included with the dryer. The wiring diagram for the dryer is located in the front electrical control box area.

  • Page 5: Table Of Contents

    Table of Contents SECTION I IMPORTANT INFORMATION ................3 A. Safety Precautions ........................... 3 SECTION II ROUTINE MAINTENANCE ................5 A. Cleaning ............................5 B. Adjustments ............................ 6 C. Lubrication ............................6 SECTION III INSTALLATION REQUIREMENTS ..............7 A. Enclosure, Air Supply, and Exhaust Requirements ................7 B.
  • Page 6 SECTION V SERVICING ....................... 16 Introduction............................16 A. Computer Controls ......................... 17 B. Ignition Controls ..........................18 C. Thermostats............................ 22 D. Sail Switch Assembly (Gas Models Only) ..................23 E. Front Panel and Main Door Assemblies................... 24 F. Pulleys ............................27 G.

  • Page 7: Important Information

    4. Installation and service must be performed by a qualified installer, service agency, or gas supplier. 5. Dryer(s) must be exhausted to the outdoors. 6. Although ADC produces a very versatile dryer, there are some articles that, due to fabric composition or cleaning method, should not be dried in it.
  • Page 8 WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a fire hazard. WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or similarly textured rubber materials. Drying in a heated basket (tumbler) may damage plastics or rubber and may be a fire hazard.

  • Page 9: Routine 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 10: Adjustments

    90 DAYS Remove lint from basket (tumbler), drive motors, and surrounding areas. Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment. NOTE: To prevent damage, avoid cleaning and/or touching the ignitor/flame-probe assembly. Remove lint accumulation from inside control box and at rear area behind control box. 6 MONTHS Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from dryer’s internal exhaust ducting.

  • Page 11: Installation Requirements

    SECTION III INSTALLATION REQUIREMENTS Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1- LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electrical Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION (for General Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 &...

  • Page 12: Electrical And Gas Requirements

    B. ELECTRICAL AND GAS REQUIREMENTS It is your responsibility to have ALL electrical connections made by a properly licensed and competent electrician to assure that the electrical installation is adequate and conforms to local and state regulations or codes. In the absence of such codes, ALL electrical connections, materials, and workmanship must conform to the applicable requirements of the National Electrical Code ANSI/NFPA NO.
  • Page 13 Natural Gas ------------------- 3.5 Inches (8.7 mb) Water Column. Liquid Propane (L.P.) Gas ---- 10.5 Inches (26.1 mb) Water Column. 6. If computer program changes are required, refer to the Phase 5 OPL Operator’s Manual (ADC P/N 112147) for details.

  • Page 14: Description Of Parts

    SECTION IV DESCRIPTION OF PARTS A. CONTROL PANEL (MICROPROCESSOR) Lifting the control door will reveal the control panel assembly. Opening the control panel will allow access to the major components which include the computer board and keyboard (touch pad). The keyboard (touch pad) inputs to the computer what temperature and program has been selected.

  • Page 15: Gas Burner Assembly

    D. GAS BURNER ASSEMBLY Gas heated dryers are equipped with a gas burner assembly consisting of four (4) burner tubes, gas valve, spark ignition probe assembly, sail switch, and hi-limit thermostat. The inlet piping enters through the rear of the dryer on the left-hand side (viewing from the front) and runs to the front of the dryer where the gas valve is located.

  • Page 16: Blower Motor And Impellor (As Of August 7, 1995)

    G. BLOWER MOTOR AND IMPELLOR (PRIOR TO AUGUST 7, 1995) The impellor is shaft driven. The blower motor drives the shaft on which the impellor is mounted. This enables the impellor to run at a higher RPM, thereby producing a higher airflow (CFM).

  • Page 17: Basket (Tumbler)

    K. BASKET (TUMBLER) The basket (tumbler) consists of four (4) ribs and four (4) perforated panels, along with a front and back, which are screwed together as an assembly. The basket (tumbler) also consists of tie rods, which support the basket (tumbler) from the front to back.

  • Page 18: Hi-Limit (Gas Models Only)

    N. HI-LIMIT (GAS MODELS ONLY) A hi-limit thermostat is located at the burner. This is an automatic reset disc-type thermostat set at 330º F (166º C). If the flame in the burner should get too hot, this thermostat will shut off the burner.

  • Page 19: Lint Drawer Switch

    Q. LINT DRAWER SWITCH The lint drawer switch is located in the lint compartment and attached to the side of the lint drawer track. The lint drawer switch insures that the dryer will operate only when the lint drawer is completely closed. This is a safety device and should never be disabled.

  • Page 20: Servicing

    SECTION V SERVICING INTRODUCTION ALL electrical/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 21: Computer Controls

    A. COMPUTER CONTROLS To Replace Computer 1. Discontinue electrical power to the dryer. 2. Disconnect main power harness from rear of computer by squeezing locking tab and pulling connector straight back. 3. Disconnect the green ground wire from the computer. 4.

  • Page 22: Ignition Controls

    5. Disconnect the two (2) orange wires from the high heat (225º F [107º C]) thermostat, and remove modular bracket connector, wires, and probe from bracket assembly. 6. Install new sensor probe assembly (ADC P/N 880251) by reversing procedure. 7. Reestablish electrical power to the dryer.
  • Page 23 NOTES: Before reestablishing power to the dryer, visually check the following (refer to the illustration): 1. The flame electrode, ignitor electrode, and ground rod are ALL on the same line axis. 2. There should be a 1/8” gap (+/- 1/32”) between the ignitor electrode and ground rod. 3.
  • Page 24 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 pressure: a.
  • Page 25 To Convert from Natural Gas to Liquid Propane (L.P.) Gas NOTE: ALL dryers are sold as natural gas, unless otherwise specified at the time the dryer order was placed. For L.P. gas the dryer must be converted as follows. 1. Refer to “Replace Gas Valve” and follow steps 1 through 6. 2.

  • Page 26: Thermostats

    To Replace Direct Spark Ignition (DSI) Module 1. Discontinue electrical power to the dryer. 2. Remove the wires connected to the terminal strip at the bottom of the module. 3. Remove the four (4) screws securing the module to the mounting bracket. 4.

  • Page 27: Sail Switch Assembly (Gas Models Only)

    To Replace Lint Compartment Hi-Heat Protector (225º F [107º C]) Thermostat This thermostat is part of the “sensor bracket assembly” and is secured to the underside of the basket (tumbler) wrapper in the lint compartment. As a safety device, this thermostat will open (shut off) the heating unit circuit if an excessive temperature occurs.

  • Page 28: Front Panel And Main Door Assemblies

    E. FRONT PANEL AND MAIN DOOR ASSEMBLIES To Replace Main Door Switch 1. Discontinue electrical power to the dryer. 2. Open main door. 3. Remove the two (2) Phillips head screws holding the main door switch bracket assembly in place. 4.
  • Page 29 This area must be completely cleaned for correct bonding. 5. Apply a narrow bead of silicone (ADC P/N 170730) ALL around main door area where glass will rest. 6. Install glass onto door adhesive and slightly press glass in place.
  • Page 30 To Replace Main Door Hinge Blocks 1. Discontinue electrical power to the dryer. 2. Follow procedure for removal of main door assembly. 3. Disassemble bottom hinge block from front panel by removing the Allen head screws located inside the hinge block. 4.

  • Page 31: Pulleys

    F. PULLEYS To Replace Basket (Tumbler) Pulley 1. Loosen V-belts. Rotate pulley and roll V-belts out of grooves. 2. Remove cap screws from the bushing. 3. Insert cap screws in tapped removal holes and tighten evenly until bushing becomes loose on shaft. (Refer to figure “A.”) 4.
  • Page 32 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 6 ft-lbs. (26.6 newtons), 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 33: Basket (Tumbler) Assembly

    5. Assemble bushing and sheave as shown in figure “B.” When cap screws are loosely inserted, bushing remains fully expanded to provide a sliding fit on the shaft. 6. Insert key on the shaft, then slide sheave to desired position with cap screw heads to the outside. 7.
  • Page 34 Basket (Tumbler) Alignment (Lateral) (Side to Side Adjustment) 1. Discontinue electrical power to the dryer. 2. Remove back guard. 3. Loosen rear pillow block bearing bolts (C). 4. Back off jam nuts on the two (2) lateral adjustment bolts (A) and (B). 5.

  • Page 35: Bearings (Refer To The Illustrations In Section F "Pulleys")

    IMPORTANT: Never strike the shaft directly with a hammer. 8. Remove basket (tumbler) from basket (tumbler) support. a. Remove the bolt in the center of the basket (tumbler) back wall. b. Loosen and remove the eight (8) sets of nuts and washers from basket (tumbler) tie rods. Remove the eight (8) tie rods.
  • Page 36 To Replace Front Basket (Tumbler) Support Pillow Block Bearing 1. Discontinue electrical power to the dryer. 2. Remove back guard. 3. Follow steps 3 through 6 from “To Replace Rear Basket (Tumbler) Support Pillow Block Bearing.” 4. Remove the two (2) retaining rings from the basket (tumbler) shaft. 5.

  • Page 37: V-Belts (Refer To The Illustrations In Section F "Pulleys")

    To Replace Rear Idler Shaft Pillow Block Bearing 1. Follow steps 1 through 3 from “To Replace Front Idler Shaft Pillow Block Bearing.” 2. Remove retaining rings on each side of forward idler shaft pillow block bearing. 3. Loosen the two (2) setscrews on each bearing collar. 4.

  • Page 38: Motors And Impellors

    V-Belt Tension Adjustment (Motor to Idler) 1. Discontinue electrical power to the dryer. 2. Loosen the nuts on the four (4) studs holding the drive motor mount to the back of the dryer. 3. Loosen the jam nuts on the adjustment screw on the top of the motor mount. 4.
  • Page 39 To Replace Impellor Motor (Direct Drive) 1. Discontinue electrical power to the dryer. 2. Disconnect motor harness from motor. 3. Remove nuts and washers holding the motor mount to the rear of the dryer and pull motor mount away. 4. Remove the two (2) left handed jam nuts on the motor shaft retaining the impellor.

  • Page 40: To Replace Lint Drawer Switch

    To Replace Impellor 1. Discontinue electrical power to the dryer. 2. Remove the left side panel to access the fan shaft mount assembly. 3. Remove the two (2) left handed jam nuts that hold the impellor to the fan shaft. 4.

  • Page 41: Troubleshooting

    SECTION VI TROUBLESHOOTING The information provided will help isolate the most probable component(s) associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned – not necessarily the suspect component itself. ELECTRICAL PARTS SHOULD ALWAYS BE CHECKED FOR FAILURE BEFORE BEING RETURNED TO THE FACTORY.
  • Page 42 D. Drive motor runs, burner is on, but basket (tumbler) will not turn... 1. Broken, damaged or loose V-belt. 2. Belts are contaminated (oil, grease, etc.). 3. Loose or broken pulley. E. Drive motor and blower motor start, computer display heat indicator is on, but there is no heat... 1.
  • Page 43 4. Poor housekeeping. Dirty or clogged lint screen. 5. Extractors (washers) are not performing properly. 6. An exceptionally cold/humid or low barometric pressure atmosphere. 7. The supply gas may have a low heating value, check with local gas supplier. 8. Failed temperature sensor (temperature calibration is incorrect). 9.
  • Page 44 L. Display reads “dSFL,” dryer sensor circuit failure... 1. Check 1/8 amp fuse on computer. 2. Faulty microprocessor temperature sensor probe. 3. Open circuit in either one (1) of two (2) wires leading from the sensor probe to the computer. a.

  • Page 45: Electrical Troubleshooting

    SECTION VII ELECTRICAL TROUBLESHOOTING The information provided will help isolate the most probable components associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned, not necessarily the suspect component itself. ELECTRICAL PARTS SHOULD ALWAYS BE CHECKED FOR FAILURE BEFORE BEING RETURNED TO THE FACTORY.

  • Page 46: Display Indicators

    NOTE: Once the Phase 5 OPL microprocessor controller (computer) detects a problem in the heat circuit, it updates every 30-seconds. If the problem was a loose connection in this circuit which corrected itself, the “dSFL” condition would automatically be cancelled. 3.
  • Page 47 Phase 5 OPL Microprocessor Controller (Computer) Relay Output Light Emitting Diode (L.E.D.) Indicators There are a series of five (5) L.E.D. indicators (red lights) located at the lower back side area of the Phase 5 OPL microprocessor controller (computer). These are identified or labeled from left to right in the illustration as “HEAT,”...

  • Page 48: Display/Codes

    1) If the motor is not operating and the “MTR” output indicator is on; then the problem (fault) is elsewhere (i.e., external to the Phase 5 OPL microprocessor controller [computer]). 4. “FWD” Output Light Emitting Diode (L.E.D.) Indicator (for Optional Reversing Models Only) a.
  • Page 49 Illus. No. 3 - BLOWER MOTOR INDICATOR - This indicator dot is on whenever a cycle is in progress. In addition, when the anti-wrinkle program is active, this indicator will be on whenever the microprocessor controller (computer) is in the guard program. Illus.
  • Page 50 L.E.D. DISPLAY CODES Slope Factor AUtO Automatic Mode (Patent No. 4,827,627) ArEv Always Reverse Heat Loss (offset) Factor Buzzer (tone) bUZ–tinE Buz Time º CEL Degree in Celsius Cool Down Cycle in Progress COOL-tinE Cool Down Time COOL-tEnP Cool Down Temperature CY A Preprogrammed Cycle A CY b...
  • Page 51 FILL No Cycle in Progress Flash Display Active GdLY Anti-Wrinkle Delay Time G on–tInE Anti-Wrinkle On Time Anti-Wrinkle Program Active Overheating Condition MAnU Manual Mode MGrd Maximum Guard Time nbUZ No Buzzer (tone) nFLS No Flash Display nGrd Anti-Wrinkle Program Is Not Active nrEu No Reverse ProG...

  • Page 52: Computer Logic And Wiring Diagram

    If your particular diagram is lost or unreadable, call ADC with the serial number of the...
  • Page 53 A. No display condition... 1. Check main fuses or circuit breaker. 2. Check blower motor overload, if tripped, reset. 3. Check fuse 1 or fuse 2 and if either are blown, replace. 4. Across terminal block nos. 6 and 8 you should be getting your 208V or 240V. If no voltage is present at 6 and 8, double check steps 1 and 2 and also check wires and terminations at these points.
  • Page 54 C. Drive motor works in forward mode but does not reverse, blower motor runs... 1. If computer dot (second one [1] from left) does not come on, check program to see if set for reverse. 2. If set for reverse, replace computer. 3.
  • Page 55 Also check for voltage at the terminals of both components. If voltage is not passing through any one (1) of the two (2) components, replace that component. 4. If voltage is present, refer to DSI Technical Manual (P/N 450119), or if equipped with ADC style DSI module refer to Technical Manual (P/N 450142).
  • Page 56 G. “Door” condition... NOTE: Make sure main door and lint drawer are closed. Also, if checking either switch, the plunger must be depressed. Check light emitting diode (L.E.D.) input light “door” on component side of the computer. If light is on, replace computer.

  • Page 57: 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 DATA LABEL (HIGH AND LOW VOLTAGE) The motor plate is located on the side of the drive motor (refer to the illustration above) and contains a graphical representation of the motor wiring for both low voltage rating and high voltage rating.

  • Page 58: Data Label

    When contacting ADC, please have the model number and serial number readily accessible. INFORMATION ON THE DATA LABEL 1. MODEL NUMBER - The model number is an ADC number, which describes the size of the dryer and the type of heat (gas, electric, or steam).

  • Page 59: Using A Manometer

    C. USING A MANOMETER 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 (refer to the illustration below). 3.

  • Page 60: 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 61 ADC 450189 1 - 08/12/02-25...

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