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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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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 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. «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 co
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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 Content SECTION I Important Information ...................................................................................................................................... 3 A. Safety Precautions.......................................................................................................................................... 3 SECTION II Maintenance .................................................................................................................................
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SECTION VI Troubleshooting .............................................................................................................................................. 38 SECTION VII Phase 6 OPL System Diagnostics ................................................................................................................ 41 A. Diagnostic (L.E.D. Display) Failure Codes .................................................................................................. 41 B. LED Display Indica
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SECTION I Important Information A. Safety Precautions 1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. 2. Purchaser or user should consult the local gas supplier for proper instructions to be followed in the event the user smells gas. 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 fa
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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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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 partially closed can result in slow drying and shutdown of the heat circuits safety switches or thermostats. NOTE: When cleaning dryer cab
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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, installation must conform to applicable AMERICAN NATIONAL STANDARDS: National Fuel Gas Code ANSI Z223.1-LATEST EDITION or National Electric Code ANSI/NFPA No. 70- LATEST EDITION, or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for Electrical Connections). A. Enclosure, Air Supply, and Exhaust Requireme
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The dryer installation must meet the AMERICAN NATIONAL STANDARD, NATIONAL FUEL GAS CODE ANSI Z223.1-LATEST EDITION, as well as, local codes and ordinances, and must be done by a qualified technician, or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for Electrical Connections). NOTE: Undersized gas piping will result in ignition problems and slow drying and can create a safety hazard. The dryer must be connected to the type of gas (natural or L.P.) indicated on the drye
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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. The keypad inputs to the computer what temperature and program has been selected. The com- puter controls the entire operation of the machine. It accepts inputs and gives outputs throughout the machine. as of February 11, 1
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...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. ...with fuses 9
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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. Upon ignition, the resistance in the flame sensor electrode changes and the information is sent to the HSI module via the sensor probe lead connection to the module. Once the resistance is c
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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. The drive motor is a 1/2 HP motor and operates on 208 to 460 volts, 50/60 hertz, 3- phase. F. Blower Motor and Impeller The impeller is shaft driven. The blower mo- tor drives the shaft on which the impeller is mo
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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; or with two (2) taperlock bear- ings, on models manufactured after December 15, 1997; and two (2) 1" pillow block bearings. 12
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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; or with two (2) taperlock bearings on models manufactured after December 15, 1997; and two (2) 1" pillow block bearings. transtorque taperlock 13
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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. 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 d
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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. This creates a negative pressure inside the burner box, and this negative pressure pulls in the round damper and activates the sail switch. If there is improper air flow, the damper will not pull in, preventing the burner fr
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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. At this time, the thermostat will reset. Basket and blower will run but the dryer will not heat. If the temperature sensor opens the display will read "TEMP SENSOR FAIL C
