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ML-96
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
080699DMG/tcosta ADC Part No. 450406
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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/operator's manual included with the dryer. The following FOR YOUR SAFETY caution
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IMPORTANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY 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. «Attention: Lor des opérations dentretien des commandes étiqueter tous fils avant Caution: Label all wires prior to de les déconnecter. Toute erreur de disconnection when servicing controls. Wiring
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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. Dryers must not be installed or stored in an area where it will
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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 ..............................................................................................................15 A. Computer Controls ................................................................................................................. 15 B. Ignition Controls ...................................................................................................................... 17 C. Manual Reset Burner Hi-Limit Thermostat (Gas Models Only) Replacement .............
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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 tumbler (basket) may damage plastics or rubber and also may be a fire hazard. 7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust duct work, and inside the dryer. The frequency of inspection a
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SECTION II ROUTINE MAINTENANCE A. CLEANING A program and schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the duct work 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 provide
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EVERY 6 MONTHS Inspect and remove lint accumulation in customer furnished exhaust duct work system and from dryers internal exhaust ducting. 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. NOTE: A back draft damper that is sticking par
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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: National Fuel Gas Code ANSI.Z223.1-LATEST EDITION or National Electrical Code ANSI/NFPA No. 70- LATEST EDITION, or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA- B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas)
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IMPORTANT: Failure to comply with these codes or ordinances and the requirements stipulated in this manual can result in personal injury or component failure. The dryer installation must meet the American National Standard, National Fuel Gas Code ANSI Z223.1- LATEST EDITION, or in Canada, the Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for Electrical Connections) as well as, local codes and ordinances, and must be done by a qualified technician. NOTE: Undersized gas p
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NOTE: Water column pressure requirements (measured at the pressure tap on the gas valve body): Natural Gas - 3.5 inches water column (W.C.) - 8.7 mb. L.P. Gas - 10.5 inches water column (W.C.) - 26.1 mb. 6. If computer program changes are required, refer to the Phase 6 OPL Operators Manual (ADC Part No. 113022) for details. 7. The dryer should be operated through one complete cycle to assure that no further adjustments are necessary and that ALL components are functioning properly. 8. Check the
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SECTION IV DESCRIPTION OF PARTS A. COMPUTER 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 keypad (touchpad). The keypad (touchpad) inputs to the computer what temperature and program has been selected. The computer controls the entire operation of the machine. It accepts inputs and gives outputs throughout the machine. B. REVERSING RELAY PANE
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C. HSI (HOT SURFACE IGNITION) MODULE (Gas Models Only) The HSI (Hot Surface Ignition) 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 24 VAC will glow bright orange for the inter-purge time period. Upon ignition, the resistance in the flame sensor electrode changes and the information is sent to the HSI (Hot Surface Ignition) module via the s
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F. 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-inch (22.86 cm) drive pulley, two (2) 6-inch (15.24 cm) wheels, one (1) taper lock bearings, and one (1) 1- inch (2.54 cm) pillow block bearings. G. 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 one (1)
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I. MAIN DOOR SWITCH The main door switch is mounted to the front panel behind the main door. When the main door opens, the switch will also open, preventing the dryer from operating. The main door switch is a safety device and should never be disabled. J. 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
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L. MANUAL RESET THERMOSTAT This is located inside the dryer in the lint compartment above the lint screen. This thermostat senses the heated air after it passes through the tumbler (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. At this time, the manual reset thermostat must be reset manually or the 24 VAC burner circuit will never be completed. Tumbler (basket) and blower will run but the dr
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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. 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
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4. Remove the two (2) screws securing the computer to the computer panel. Remove the computer by pulling the other two (2) corners off the clinch studs. 5. Install new computer by reversing this procedure. Keyboard (Touchpad) Label Assembly Replacement 1. Discontinue electrical power to the dryer. 2. Unplug keyboard (touchpad) ribbon from rear of the computer. 3. Slowly peel off and remove keyboard (touchpad) label assembly from control panel. 4. Peel paper backing off new keyboard (touchpad)
