ADC ML-82 manual

082499MFM/tcosta AD C Part No. 450404 ML-82 Service Manual American Dryer Corporation 88 Currant Road Fall River , MA 02720-4781 T elephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry .com[...]

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. ONL Y qualified technicians should service this equipment. OBSER VE ALL SAFETY PR[...]

IMPOR T ANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y and THE GAS SUPPL Y or THE STEAM SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING , ADJUST - ING , INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. CHILDREN SHOULD NOT BE ALLOW[...]

W ARNING The dryer must never be operated with any of the back guards, outer tops, or service panels r emoved. PERSONAL INJUR Y or FIRE COULD RESUL T . IMPOR T ANT PLEASE OBSER VE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual included with the dryer . The wiring diagram for the dryer is lo[...]

Table of Contents SECTION I IMPOR T ANT INFORMA TION ........................................................................................................ 3 A . Safety Precautions ........................................................................................................... ........................ 3 SECTION II SPECIFICA TIONS/COMPO[...]

SECTION VI PHASE 6 OPL SYSTEM DIAGNOSTICS ...................................................................................... 34 A . Diagnostic (L.E.D. Display) Failure Codes .................................................................................... ....... 3 4 B . L.E.D. (Light Emitting Diode) Display Indicators ......................[...]

3 SECTION I IMPOR T ANT INFORMA TION A. SAFETY PRECAUTIONS W ARNING: 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. W ARNING: The dryer must never be operated with any of the back guards, outer tops, or service panels remov[...]

4 W ARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a fire hazard. W ARNING: 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 also may be a fire hazard. 7. A program should[...]

5 BASKET ( TUM BLER ) DI AM E TE R 3 7" 94 cm BASKET ( TUM BLER ) D EP T H 36" 91.5 cm BASKET ( TUM BLER ) MO TO R 1/2 H P .373 kw BLOWER M O TOR 3 HP 2.238 kw DOOR OP ENI NG (D IA ME T E R ) 21- 1/2" 54.61 cm BASKET ( T UM BLE R ) V O LU M E 22.4 cu. f t. .634 cu.m . DR Y ER S PE R 20' / 40' C O N T AIN ER 10/ 20 DR YERS P[...]

6 Specifications MLG-82 (Gas) MLS-82 (Steam) NOTE: ADC reserves the right to make changes in specifications at any time, without notice or obligation.[...]

7 B. COMPONENT IDENTIFICA TION 1. Dryer Front V iew Illus. No. Description 1 Controls 2 Control (top access) Door Assembly 3 Main Door Assembly 4 Lint Compartment Area (lint screen located behind door) 5 Lint Drawer 6 Data Label and Installation Label (located behind control [service] door)[...]

8 2. Dryer Rear V iew Illus. No. Description 1 Heating Unit 2 1/8" Compressed Air Supply Inlet (behind Electric Service Relay Box for Steam Models Only) 3 * Electric Service Relay Box 4 T umbler Bearing Mount Assembly 5 Idler Bearing Mount Assembly 6 Basket (Drive) Motor Assembly (for Reversing Models Only) 7 Blower Motor Assembly 8 Dryer Exha[...]

9 SECTION III ROUTINE MAINTENANCE A. CLEANING A program or 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 up[...]

10 90 DA Y S 1. Remove lint from around basket (tumbler), drive motors, and surrounding areas. 2. Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment. 3. Clean any lint accumulation in and around both the blower and drive motor casing openings. NOTE: T o prevent damage, avoid cleaning or touching the hot surface[...]

11 SECTION IV DESCRIPTION OF P AR TS A. CONTROL PANEL ASSEMBL Y The control panel assemble is made up of a keypad to enter your selections, and a Phase 6 main computer board. The computer controls all input and output functions of the machine. B. DOOR SWITCH ASSEMBL Y The main door switch assembly is a safety device used to stop the tumbler in case[...]

12 D. THE BASKET AND SUPPOR T ASSEMBL Y The basket and support assembly is designed for 80 lbs. (36 km) of dry material. It is supported by a shaft and two (2) bearings. E. TEMPERA TURE SENSOR BRACKET ASSEMBL Y This bracket assembly is equipped with two (2) important devices. One is the temperature probe and the other is the 225º F (107º C) baske[...]

13 G . IDLER ARM ASSEMBL Y The idler arm/pulley has the purpose of taking the speed of the motor and reducing it. Adding tourque to the 18” (46 cm) basket pulley is also the function of the idler arm/pulley . H. BLOWER MOTOR The blower/fan motor has only one purpose in the dryer . It produces the airflow (cfm) throughout the machine. I. DRIVE/FAN[...]

14 J. HSI (HOT SURF ACE IGNITION) BURNER BOX ASSEMBL Y The HSI (Hot Surface Ignition) burner box assembly consists of a number of very important parts for the dryer . A gas valve, hot surface ignitor , hot surface module, flame sensor , sail switch, burner hi-limit. These parts are for the “heat” of the dryer . K. SAIL SWITCH ASSEMBL Y The sail[...]

15 M. REVERSING RELA Y PANEL This panel is located in the back of the machine at the upper left hand corner . On this panel is an arc suppressor (A.S.) board which filters out “noise” that might go to the coils of the contactors. Also mounted on this panel are the drive and blower/fan contactors. The two (2) fuses mounted on the panel are prote[...]

16 SECTION V SER VICING INTRODUCTION ALL electrical and mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off). W ARNING: PERSONAL INJURY COULD RESUL T . The information provided in this section should not be misconstrued as a device for use by an untrained person making repairs. Service work sh[...]

17 A. COMPUTER CONTROLS T o Replace Computer Board 1. Disconnect electrical power to dryer . 2. Unplug keyboard ribbon from rear of computer . 3 . Unplug all wiring harnesses connected to the computer board. 4. Remove the two (2) screws securing the computer to the computer panel. Remove the computer by pulling the other two corners off the clinch [...]

18 4. Disassemble sensor probe from bracket assembly by removing the top push-on fastener securing the probe from bracket. Use a small screwdriver to slowly pry the fastener off. 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[...]

19 T o Replace Gas V alve (Refer to burner illustration on page 14 ) 1. Discontinue electrical power to the dryer . 2. Close shut-off valves in gas supply line. 3. Disconnect gas valve wiring. NOTE: Identify location of each wire for correct reinstallation. 4. Break union connection before gas valve. 5. Loosen and remove four (4) screws securing pi[...]

20 1. T o test gas water column (W .C.) Pressure: a . Connect water column test gauge connection to gas valve pressure tap (1/8" NPT). This pressure tap is located on the outlet (manifold) side of the valve. b. S tart dryer . W ith burner on, the correct water column reading in inches would be: Natural Gas - 3.5 Inches W ater Column - 8.7 mb. [...]

21 T o Replace Burner T ubes 1. Refer to “Replace Gas V alve” and follow S teps #1 through S tep #6 . 2. Remove four (4) screws securing the Hot Surface Ignitor (HSI) module mounting bracket. 3. Remove front flanges of the burner tubes to the burner tube rest. 4. Remove the screws securing the burner tube rest to the oven and remove this rest. [...]

22 1. Discontinue electrical power to the dryer . 2. Disconnect wires from hi-limit thermostat. 3. Remove the two (2) screws, washers and nuts securing thermostat to the bracket. Remove thermostat. 4. Reversing procedure for installing new thermostat. 5. Reestablish electrical power to dryer . T o Replace Lint Compartment Hi-Heat Protector (225º F[...]

23 T o Replace Sail Switch 1. Discontinue electrical power to the dryer . 2. Remove the two (2) screws which hold the sail switch box cover to sail switch box. 3. Disconnect the two (2) wires from the switch. 4. Disassemble sail switch from mounting bracket by removing the two (2) screws securing switch in place. 5. Reverse this procedure for insta[...]

24 T o Replace Main Door Assembly 1. Open main door . 2. Holding the door upward remove the two (2) screws from the top hinge block. 3. Lift the door up to remove. 4. Reverse this procedure for reinstalling new main door assembly . T o Install New Main Door Glass 1. Remove main door assembly from dryer (follow main door removal procedure). 2. Lay m[...]

25 7. After the curing period, install the main door on the dryer by reversing S tep #4 through S tep #1 . NOTE: Once the silicone is cured you may want to trim any excess silicone on the inside of the main door assembly . T o Replace Front Panel 1. Discontinue electrical power to the dryer . 2. Remove bottom lint door assembly . 3. Remove the fron[...]

26 F . STEAM CONTROLS Installation Piping must be installed in accordance with good commercial steam system practice. See the illustration below for a typical pipe arrangement. T o Replace S team Coil (Damper System) 1. Discontinue electrical power to the dryer . 2. Remove the four (4) lock washers and hex nuts securing the hinges to steam coil. 3.[...]

27 T o Replace Piston 1. Discontinue electrical power to the dryer . 2. Discontinue the air supply to the dryer . 3. Remove left and right piston supports by removing two (2) washers and hex nuts and slide pin out. 4. Remove 1/8” M.P .T . connector from the piston and remove acorn nut on the end of piston shaft (this will be used on new piston). [...]

28 Reversing Figure B Figure A CAUTION: Steam coil and/or piping may be hot, allow time to cool. 4. Remove remaining piping from steam coil. 5. Remove six (6) screws holding coil to steam rack and lift core out. 6. Reverse procedures for installing new core. G . TUMBLER and BEARING ASSEMBL Y (Remove back guard to access assembly) T o Replace T umbl[...]

29 NOTE: If any rust has developed, use an emery cloth to polish the shaft. 5. Remove bolts securing bearing to bearing box and remove tumbler bearing. 6. Reverse procedure for installing new tumbler bearing. NOTE: Check alignment of pulleys before operating dryer . T o Replace The Front T umbler Bearing 1. Remove tumbler pulley and bearing box (fo[...]

30 a . Remove two (2) bolts securing idler arm to the idler backup plate. b. Remove idler arm assembly . c . Loosen set screws on both the front and rear bearing and remove the idler shaft. d. Remove three (3) bolts securing the bearing to the idler arm and remove bearings. 3. Reverse procedure for installing new idler bearings. NOTE: Check tension[...]

31 7. Leave a larger gap from the inside ring on the top of the front panel opening to the tumbler , and a smaller gap on the bottom to compensate for the weight of the clothes being dried. 8. T ighten the four (4) hex head bolts on the sides of the bearing box, and the two (2) Allen head adjustment screws. 9. Replace back guard. 10. Reestablish el[...]

32 f . Disconnect the main door switch harness at connector . IMPOR T ANT : When removing front panel assembly be careful not to damage door switch wires. 3. Loosen set screws on rear tumbler bearings. 4. Using a wheel puller gently push the tumbler shaft towards the front through the tumbler bearings. NOTE: An alternate method would be to place a [...]

33 V -Belt T ension Alignment - Motor T o Idler 1. Loosen two (2) bolts connecting idler arm to backup plate. 2. Back off on jam nut(s) on the adjusting bolt. 3. Loosen/tighten adjustment bolt to decrease/increase belt tension. 4. T ighten adjustment bolt jam nut(s). 5. T ighten the two (2) bolts loosened in S tep #1 . T o Replace V -Belts 1. Loose[...]

34 SECTION VI PHASE 6 OPL SYSTEM DIAGNOSTICS IMPOR T ANT : Y ou must DISCONNECT and LOCKOUT THE ELECTRIC, GAS or STEAM SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. ALL major [...]

35 microprocessor controller (computer) determines the ignition control has failed. If this occurs when the cycle is active the machine will display “bURNER CONTROL F AIL.” If the tumbler temperature is above 100º F (38º C) the machine will continue to display “bURNER CONTROL F AIL.” The machine will run with no heat for three (3) minutes[...]

36 NOTE: RPM- This routine monitors the timing response from the existing rotational sensor input and derives a RPM measurement. T o display this RPM measurement (press the “ENTER/ ST AR T” key once and release, then press the “ENTER/ST AR T” key a second time and hold. This will display the RPM measurement). The rotational sensor must be a[...]

37 C. PHASE 6 OPL MICROPROCESSOR CONTROLLER RELA Y OUTPUT L.E.D. INDICA T ORS There are a series of five (5) L.E.D. (light emitting diode) indicators (ORANGE LIGHTS) located at the backside are of the Phase 6 OPL microprocessor controller (computer). These are identified or labeled (from top to bottom in the illustration below as: F AN-BLOWER, FOR-[...]

38 1. “F AN” (BLOWER) Output L.E.D. (light emitting diode) Indicator A . If the dryer is started and the blower motor is not operating, yet the Phase 6 OPL microprocessor controller (computer) display fan indicator dot and power supply input L.E.D. are on, but the fan output L.E.D. is off, then the fault is the Phase 6 OPL microprocessor contro[...]

39 7. “LINT” (LINT DOOR) Input L.E.D. (light emitting diode) Indicator A . Should be on ALL the time (unless the lint door is opened then the “LINT” L.E.D. indicator will go out). B . If the dryer is active (running) and the lint door is opened the “LINT” L.E.D. indicator will go out and the display will read “LINT dOOR.” The dryer [...]

40 12. “FLAME” (bURNER CONTROL F AIL) Input L.E.D. (light emitting diode) Indicator A . This routine monitors the ignition control’ s gas valve output response. If the valve output signal is not present from the ignition control within the valve time limits the microprocessor determines the ignition control has failed. If this occurs when the[...]

41 D. L.E.D. CODES 1. Display Codes A SLOPE F ACTOR ALL REV AL W A YS REVERSING ANTI WRINKL dELA Y TIME ANTI-WRINKLE DELA Y TIME ANTI WRINKL GUARd ACTIVE ANTI-WRINKLE PROGRAM ACTIVE ANTI WRINKL GUARd ON TIME ANTI-WRINKLE GUARD ON TIME AUTO CYCLE AU TOMA TIC MODE b HEA T LOSS (OFF SET) F ACTOR bURNER CONTROL FAIL GAS ONL Y POWER (24VAC) IS NOT EVIDE[...]

42 E. FAUL T CODES bURNER CONTROL F AIL - GAS MODELS ONL Y POWER (24 V AC) IS NOT EVIDENT A T GAS V AL VE bURNER FLAME F AIL - The Phase 6 Microprocessor Controller (computer) DOES NOT SENSE FLAME VERIFICA TION (GAS MODEL ONL Y) bURNER SAFETY F AIL - GAS/ELECTRIC ONL Y BURNER/OVEN OPEN HI-LIMIT CIRCUIT dRUM SAFETY F AIL - Fault in the TUMBLER HI-LI[...]

43 SECTION VII TROUBLESHOOTING W ARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y and THE GAS SUPPL Y or THE STEAM SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE T O ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. T[...]

44 C . Dryer will not start, but computer display indicators are on... 1. Failed contactors. 2. Failed arc suppressor (A.S.) board. 3. Failed microprocessor controller (computer). 4. Failed motors. D . Drive motor runs, burner is on, but basket will not turn... 1. Broken, damaged or loose V -belt. 2. Belts contaminated (oil, grease, etc.). 3. Loose[...]

45 6. Out of balance impellor (fan). 7. Insufficient make-up air . G . Overload for impellor (fan) motor is tripping... 1. Either an exceptionally low or high voltage supply . 2. Motor bearing failure. 3. Motor vents are blocked with lint. 4. Failed motor . 5. Failed overload. 6. Insufficient make-up air . H . Burner hi-limit safety thermostat is t[...]

46 K . There is excessive vibration coming from the basket... 1. Basket is out of adjustment. 2. Drive shaft or idler shaft is out of alignment. 3. Faulty pillow block bearing. 4. Faulty tumbler wheel. 5. Drive motor and shaft not aligned. 6. Faulty retaining wheel.[...]

47 SECTION VIII ELECTRICAL TROUBLESHOOTING[...]

48 1. No Display Condition a . Check fuse 1 or 2 and if either are blown, replace. b. T ake voltage reading across the microprocessor (J7) 9-pin connector pins 1 and 2. If no voltage is present at pins 1 and 2, double check the secondary (24 V AC) side of transformer at the blower motor contactor number 13 to ground if voltage is present. Problem i[...]

49 If there is voltage across the two BS3 terminals and no voltage across the coil of the reversing contactor (A1 and A2), the problem is bad wires or terminations between BS1 and the contactor coil. d. If there is no voltage between the two (2) BS3 terminals on the arc suppressor board, check for voltage across the two (2) AS3 terminals on the boa[...]

50 d. If no voltage is present at J7 9-pin connector no. 3 to ground, then voltage should not be present at no. 5 to ground. Replace the microprocessor controller (computer). 6. Main Door Condition NOTE: Make sure main door and lint door are closed. Also, if checking either switch, the plunger must be depressed. a . Check L.E.D. (light emitting dio[...]

51 SECTION IX TECHNICAL INFORMA TION The following section contains various technical information important to the service person in servicing and maintaining the dryer . A. MOT OR PLA TE (HIGH and LOW VOL T AGE) The motor plate is located on the side of the drive motor (see illustration) and contains a graphical representation of the motor wiring [...]

52 When contacting American Dryer Corporation certain information is required to insure proper service/parts information from American Dryer . This information is on the data label located on the inside of the control door . When contacting American Dryer please have the model number and serial number available. B. DA T A LABEL Contact American Dr [...]

53 THE DA T A LABEL 1. MODEL DRYER The model number is an ADC number which describes the size of the dryer and the type of heat (gas, electric, or steam). 2. SERIAL NUMBER The serial number allows ADC to gather information on your particular dryer . 3. MANUF ACTURING CODE NUMBER The manufacturing code number is a number issued by ADC which describe[...]

54 IMPORT ANT MANUAL RESET HI-LIMIT INSTRUCTIONS FOR PHASE 6 MODELS This dryer was manufactured with a manual reset burner hi-limit thermostat which is monitored by the Phase 6 computer . If the manual reset burner hi-limit thermostat is open prior to the start of the machine, the dryer will start momentarily and the shut down displaying “burner [...]

55 C. COMPUTER LOGIC 1. Operator enters desired selections. 2. Information entered is sent to the microprocessor via the keyboard (touchpad). 3. The input information is sorted, processed and executed by the microcomputer chip. 4. The microcomputer output signal activates the contactors and HSI (Hot Surface Ignition) module which control machine fu[...]

56 SECTION X SER VICE/P AR TS INFORMA TION A. SER VICE 1. Service must be performed by a qualified trained technician, service agency , or gas supplier. If service is required, contact the distributor from whom the ADC equipment was purchased. If the distributor cannot be contacted or is unknown, contact the ADC Service Department for a distributor[...]

57 SECTION XI W ARRANTY INFORMA TION A. RETURNING W ARRANTY CARD(S) 1. Before any dryer leaves the ADC factory test area, a warranty card is placed on the back side of the main door glass. These warranty cards are intended to serve the customer where we record the individual installation date and warranty information to better serve you should you [...]

58 2. Each part must be tagged with the following information: a. Model number and serial number of the dryer from which part was removed. b. Nature of failure (be specific). c . Date of dryer installation. d. Date of part failure. e . Specify whether the part(s) being returned is for a replacement, a credit, or a refund. NOTE: If a part is marked [...]

59 D. ML-82 TOOL LIST Straight Head Screwdriver Phillips Head Screwdriver Sensor Pin and Socket T ool (P/N 122801) Pliers 1/4” Nut Driver 3/8” Open End W rench 5/8” Open End W rench 3/8” Socket W rench 1/2” Socket or Open End W rench 1/4” Open End W rench 5/16” Socket or Open W rench 1/2” Socket W rench 7/16” Socket or Open End W [...]

ADC 450404 1 - 12/21/99-50[...]