Instruction/ maintenance manual of the product ML-82 ADC
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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 .
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.
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.
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 .
Table of Contents SECTION I IMPOR T ANT INFORMA TION ........................................................................................................ 3 A . Safety Precautions ....................................................................
SECTION VI PHASE 6 OPL SYSTEM DIAGNOSTICS ...................................................................................... 34 A . Diagnostic (L.E.D. Display) Failure Codes .........................................................................
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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 .
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 .
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.
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 .
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.
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.
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.
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).
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.
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.
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.
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).
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.
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.
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.
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 .
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 VER.
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.
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.
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 .
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.
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.
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.
51 SECTION IX TECHNICAL INFORMA TION The following section contains various technical information important to the service person in servicing and maintaining the dryer .
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.
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.
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 .
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.
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.
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.
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.
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” Socke.
ADC 450404 1 - 12/21/99-50.
An important point after buying a device ADC ML-82 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought ADC ML-82 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data ADC ML-82 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ADC ML-82 you will learn all the available features of the product, as well as information on its operation. The information that you get ADC ML-82 will certainly help you make a decision on the purchase.
If you already are a holder of ADC ML-82, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime ADC ML-82.
However, one of the most important roles played by the user manual is to help in solving problems with ADC ML-82. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ADC ML-82 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
