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ADG-320D and ADG-330D
24 VAC Phase 5
Dual Microprocessor Controller (DMC)
Mechanical/Electrical
Service Procedures
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
062094 ADC Part No. 450303
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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 ROUTINE MAINTENANCE ....................................................................................3 A. Cleaning ..................................................................................................................................... 3 B. Adjustments ............................................................................................................................... 4 C. Lubrication ..........................................................
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SECTION III TROUBLESHOOTING ........................................................................................... 28 SECTION IV ELECTRICAL TROUBLESHOOTING................................................................36 SECTION V DATA LABEL INFORMATION .............................................................................41 A. Data Label ............................................................................................................................... 41 B. Testing and
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SECTION I 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 provide
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Remove lint accumulation from around the openings in the dryer’s back panels. Remove lint from gas valve burner train area with a dusting brush or vacuum cleaner attachment. Remove any lint accumulation from coin acceptor area, including the optical switch. Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from the dryer’s internal exhaust ducting. WARNING: THE ACCUMULATION OF LINT IN THE EXHAUST DUCTWORK CAN CREATE A POTENTIAL FIRE HAZARD. Clean the steam co
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SECTION II MECHANICAL A. TO REMOVE LINT DRAWER 1. Pull out lint drawer 3/4’s of the way (approximately 20 inches [50.8 cm]). 2. Reach up into the back of the lint drawer and pull down the retainer (hinge) that is attached to the top of the lint drawer. 3. The lint drawer can now be removed. 4. Reverse procedure for reinstalling the lint drawer. B. TO REMOVE CONTROL (MIDDLE) OR LINT (LOWER) DOOR 1. Pull out lint drawer 3/4’s of the way (approximately 20-inches [50.8 cm]). Reach into the back o
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IMPORTANT: When removing the gas valve train assembly, be careful not to snag or damage the gas valve train wiring disconnected in Step #6. 8. Reverse procedure to reinstall the gas valve train assembly. NOTE: Be sure to open ALL gas shutoff valves closed prior to removing the gas valve train assembly. 9. Reestablish power to the dryer. D. TO REMOVE CONTROL BOX 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control door from the dryer (follow Lint Drawer and Control/Lint D
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5. Pull up the two (2) metal fingers where the door switch harness is secured to the frame and right side panel of the dryer. 6. Remove ALL nine (9) screws from the front panel. There are four (4) on the left side, four (4) on the right side, and one (1) at the bottom of the panel behind the control door. 7. Gently remove the front panel assembly from dryer. 8 Reverse procedure to reinstall the front panel assembly. 9. Reestablish power to the dryer. F. TO REMOVE/REPLACE LINT DRAWER SWITCH ASS
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4. To disassemble bracket assembly from dryer, disconnect the two (2) harness connectors. 5. To remove the temperature sensor and the connecting harness with its connectors: a. Disassemble microprocessor sensor probe from the bracket by removing the 1/4” push on fastener from the outside of the bracket. b. Remove harness connectors by squeezing sides and pushing towards the center of the bracket. c. Disconnect the two (2) wires from the 170º thermostat. d. Reverse procedure to install new sensor
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10. The belt will come out from the front of the dryer between the basket (tumbler) and the wrapper. 11. Reverse procedure to install new belt. IMPORTANT: Be sure to set the proper belt tension at idler adjustment (follow Belt/Idler Tension Adjustment Procedure in Section K). 12. Reestablish power to the dryer. I. TO REMOVE/REPLACE MOTOR 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control/lint door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedu
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14. Align impellor (fan/blower) to the center of the blower housing hole and remove impellor (fan/blower) by grasping fan with both hands and pulling outward. The key will also come off of the motor shaft in this procedure. 15. Return to the front of the dryer and disconnect the wiring harness from the motor. 16. Disassemble the motor from the motor mount by removing the four (4) 1/2” OD nuts (loosened in Step #7) securing the motor to the motor mount. Remove the motor through the front of the
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J. TO REMOVE/REPLACE IMPELLOR (FAN/BLOWER) 1. Discontinue power to the dryer. 2. Remove the lint drawer, the control/lint door, and the control box from the dryer (follow Control Box Removal Procedure in Section D). NOTE: If lower basket (tumbler) is being serviced, the control box does not have to be removed. 3. Loosen, (DO NOT remove) the four (4) 1/2” OD nuts that hold the motor to the motor mount. These nuts are at the underside of the motor mount assembly. 4. Remove the lower half of the
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14. The impellor (fan/blower) must now be adjusted/centered in the blower housing. Align the center of the motor shaft (at impellor [fan/blower]/shaft bearing), so that the center of the motor shaft is exactly 8- inches (20.32 cm) from the left side panel. a. Once the impellor (fan/blower) is properly centered, tighten the two (2) nuts of the impellor (fan/blower)/shaft bearing that were hand tightened in Step #13. IMPORTANT: Failure to have the impellor (fan/blower) properly aligned can result
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L. TO REMOVE DUAL MICROPROCESSOR CONTROLLER (DMC) COMPUTER PANEL ASSEMBLY 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures in Section A and Section B). 3. Remove screw in the lower right hand corner of the control panel, securing the panel to the control box. 4. Open the control panel and disconnect ALL the harnesses (the two [2] 9-pin wire harness connectors and the 4-pin connecto
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IMPORTANT: When installing the new Dual Microprocessor Controller (DMC) computer, make sure that the transformer on the DMC computer is located at the bottom area of the control panel. 9. Reverse Step #1 through Step #6. NOTE: When reconnecting the optic switch harness connector for single coin acceptor models, connect the harness to the lower of the two (2) connectors on the DMC computer. NOTE: For models with the dual coin option, the lower denomination harness connector (red/green and orange
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O. TO REPLACE COIN ACCEPTOR 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures in Section A and Section B). 3. Remove the screw located in the bottom right hand corner of the control panel. 4. Disconnect the optic switch connector(s) from the jumper connector(s). This is done by squeezing the optic switch connector tabs and pulling it apart. 5. Remove the two (2) nuts holding the “U” shap
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Q. BASKET (TUMBLER) ALIGNMENT - VERTICAL (REFER TO PAGE 17) 1. Discontinue power to the dryer. 2. Remove the upper half of the rear split back guard panel to either the top or the bottom basket (tumbler), depending on which basket (tumbler) is being serviced. 3. Loosen the four (4) hex head bolts on the sides of the bearing box (two [2] on each side). 4. Back off jam nuts on the two (2) Allen head adjustment screws. 5. Turn the screws clockwise (CW) evenly to raise the basket (tumbler) or count
