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AD-758
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
052802ASILVA/mcronan ADC Part No. 450418
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Retain This Manual In A Safe Place For Future Reference American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is properly maintained, it will provide many years of safe, efficient, and trouble-free operation. ONLY qualified technicians should service this equipment. OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation manual included with the dryer. The following “FOR YOUR SAFETY” caution must be po
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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. FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. DO NOT DRY MOP HEADS IN THE DRYER. DO NOT USE DRYER IN THE P
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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.
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Table of Contents SECTION I IMPORTANT INFORMATION .......................................................................... 3 A. Safety Precautions ....................................................................................................................... 3 SECTION II ROUTINE MAINTENANCE .............................................................................. 5 A. Cleaning .........................................................................................................
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SECTION V SERVICING ....................................................................................................... 16 Introduction.................................................................................................................................... 16 A. Computer Controls .................................................................................................................... 17 B. Ignition Controls ...............................................................
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SECTION I IMPORTANT INFORMATION A. SAFETY PRECAUTIONS WARNING: For your safety, the information in this manual must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury, or loss of life. 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. 1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other applianc
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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. 7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust ductwork, and inside the dryer. The frequency of inspection and cle
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SECTION II ROUTINE MAINTENANCE A. CLEANING A program and/or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the ductwork system. The frequency of cleaning can best be determined from experience at each location. 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 provid
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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. WARNING: THE ACCUM
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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 P
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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. 70-LATEST EDITION or in Canada, the Canadian Electrical Codes Pa
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NOTE: Pressing keyboard (touch pad) “A,” “B,” “C,” “D,” or “F” will also start the dryer. Six (6) preprogrammed drying cycles (“A” through “F”) have been stored in the computer’s memory. (Refer to the Computer Operator’s Manual for details.) 3. Make a complete operational check of ALL the operating controls to assure that the timing is correct, temperature selection switches are functioning, etc. 4. Make a complete operational check of ALL safety-related circuits: door switch(es), hi-limit ther
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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. The computer controls the entire operation of the dryer. It accepts inputs and gives outputs to various parts throughout the dryer. B. CONTRO
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D. DIRECT SPARK IGNITION (DSI) MODULE (GAS MODELS ONLY) The DSI module is a 24 VAC device designed to be the “controller” of the DSI system. When activated by the dryer controls, this module constantly monitors and controls the functions of the DSI system (i.e., spark activation, gas valve off and on, flame verification, etc.). Additionally, the DSI module has self-diagnostic capabilities. E. GAS BURNER ASSEMBLY Gas heated dryers are equipped with a gas burner assembly consisting of four
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G. BLOWER MOTOR AND IMPELLOR (NON-REVERSING) (Viewing from the front of the dryer). The blower motor is located on the back of the dryer at the lower right-hand corner. The impellor is a backward curved paddle wheel which is directly connected to the shaft of the blower motor. H. BLOWER MOTOR AND IMPELLOR (REVERSING) I. IDLER ASSEMBLY (Viewing from the rear of the dryer). The idler assembly is located approximately on the lower center of the dryer. The idler assembly consists of
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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. The basket (tumbler) support is used to mate the basket (tumbler) to the drive system in the rear. L. MAIN DOOR SWITCH The main door switch is located in the main door hinge block. When the main door opens, the switch
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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. This is generally caused by low airflow through the dryer. O. AUTOMATIC RESET THERMOSTAT This is located inside the dryer in the lint compartment above the lint drawer. This thermostat senses the heated air after it has passed through the basket (tumbler)
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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. R. STEAM DAMPER SYSTEM The newest type system is called the steam damper. It is shown to the right and it uses a piston with compressed air to open and close the steam damper, which in turn allows the air
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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. Service work should be performed by competent technicians in accordance with local, state, and federal codes. When contacting the factory for assistance, always have the dryer
