ADC ML-82 User Manual
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
082499MFM/tcosta
ADC Part No. 450404
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 must be posted near the dryer in a prominent location.
FOR YOUR SAFETY
Do not store or use gasoline or
other flammable vapors or liquids
in the vicinity of this or any other
appliance.
We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the
right to make changes from time to time, without notice or obligation, in prices, specifications, colors, and material,
and to change or discontinue models.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs on liquides
inflammables dans le voisignage de cet
appareil ou de yout autre appareil.
Important
For your convenience, log the following information:
DATE OF PURCHAS E MODEL NO.
DIS TRI BUT ORS N AME
Serial Number(s)
Replacement parts can be obtained from your distributor or the ADC factory . When ordering replacement parts
from the factory, you can FAX your order to ADC at (508) 678-9447 or telephone your orders directly to the
ADC Parts Department at (508) 678-9000. Please specify the dryer model number and serial number in
addition to the description and part number, so that your order is processed accurately and promptly.
The illustrations on the following pages may not depict your particular dryer exactly. The illustrations are a
composite of the various dryer models. Be sure to check the descriptions of the parts thoroughly before ordering.
“IMPORT ANT NOTE TO PURCHASER”
Information must be obtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions must be posted in a
prominent location near the dryer.
IMPORTANT
YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y 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 , INST ALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational
Safety and Health Administration) STANDARDS.
«Attention: Lor des opérations d’entretien
“Caution: Label all wires prior to
disconnection when servicing controls. W iring
errors can cause improper operation.”
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»
CAUTION
DR YERS SHOULD NEVER BE LEFT UNA TTENDED WHILE IN OPERA TION.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLA Y ON OR NEAR THE DRYERS.
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERA TION.
FOR YOUR SAFETY
DO NOT DR Y MOP HEADS IN THE DRYER.
DO NOT USE DR YER IN THE PRESENCE OF DR Y CLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices
ever be disabled.
WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY or FIRE COULD RESUL T .
WARNING
DRYER MUST NEVER BE OPERA TED WITHOUT THE LINT FIL TER (SCREEN) IN
PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or
specified in the installation/operator's manual included with the dryer.
Dryers must not be installed or stored in an area where it will be exposed to water or weather .
The wiring diagram for the dryer is located in the front electrical control box area.
Table of Contents
SECTION I
IMPORT ANT INFORMA TION........................................................................................................ 3
A. Safety Precautions ................................................................................................................................... 3
SECTION II
SPECIFICA TIONS/COMPONENT IDENTIFICA TION................................................................. 5
A. Specifications........................................................................................................................................... 5
B. Component Identification ......................................................................................................................... 7
SECTION III
ROUTINE MAINTENANCE.............................................................................................................9
A. Cleaning ................................................................................................................................................... 9
B. Adjustments ........................................................................................................................................... 10
C. Lubrication ............................................................................................................................................. 10
SECTION IV
DESCRIPTION OF PAR TS ............................................................................................................. 11
A. Control Panel Assembly ........................................................................................................................ 11
B. Door Switch Assembly .......................................................................................................................... 11
C. Lint Drawer and Lint Drawer Switch ................................................................................................... 11
D. The Basket and Support Assembly ....................................................................................................... 12
E. Temperature Sensor Bracket Assembly................................................................................................ 12
F. Tumbler Bearing Assembly ................................................................................................................... 12
G. Idler Arm Assembly............................................................................................................................... 13
H. Blower Motor ........................................................................................................................................ 13
I. Drive/Fan Mount Assembly................................................................................................................... 13
J. HSI (Hot Surface Ignition) Burner Box Assembly ............................................................................... 14
K. Sail Switch Assembly ............................................................................................................................ 14
L Front Panel Assembly............................................................................................................................ 14
M. Reversing Relay Panel .......................................................................................................................... 15
SECTION V
SERVICING ...................................................................................................................................... 16
A. Computer Controls................................................................................................................................. 16
B. Ignition Controls..................................................................................................................................... 18
C. To Replace Burner Hi-Limit Thermostat (Gas Models Only)............................................................... 21
D. Sail Switch Assembly (Gas Models Only)............................................................................................. 22
E. Front Panel and Main Door Assemblies................................................................................................ 23
F. Steam Controls ...................................................................................................................................... 26
G. Tumbler and Bearing Assembly............................................................................................................. 28
H. Idler Shaft and Bearing Assembly......................................................................................................... 29
I. Drive Pulley ........................................................................................................................................... 30
J. Tumbler (Basket)................................................................................................................................... 30
K. V-Belts (Refer to Illustrations in Sections I, and K).............................................................................. 32
SECTION VI
PHASE 6 OPL SYSTEM DIAGNOSTICS ...................................................................................... 34
A. Diagnostic (L.E.D. Display) Failure Codes........................................................................................... 34
B. L.E.D. (Light Emitting Diode) Display Indicators ................................................................................. 36
C. Phase 6 OPL Microprocessor Controller Relay Output L.E.D. Indicators ........................................... 37
D. L.E.D. Codes ........................................................................................................................................ 41
E. Fault Codes ............................................................................................................................................ 42
SECTION VII
TROUBLESHOOTING .................................................................................................................... 43
SECTION VIII
ELECTRICAL TROUBLESHOOTING .......................................................................................... 47
SECTION IX
TECHNICAL INFORMA TION....................................................................................................... 51
A. Motor Plate (High and Low Voltage) .................................................................................................... 51
B. Data Label ............................................................................................................................................. 53
C. Computer Logic ..................................................................................................................................... 55
SECTION X
SERVICE/PAR TS INFORMA TION ............................................................................................... 56
A. Service ................................................................................................................................................... 56
B. Parts ...................................................................................................................................................... 56
SECTION XI
WARRANTY INFORMA TION....................................................................................................... 57
A. Returning Warranty Card(s).................................................................................................................. 57
B. Parts ...................................................................................................................................................... 57
C. Returning Warranty Parts...................................................................................................................... 57
D. ML-82 T ool List..................................................................................................................................... 59
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
appliance.
2. Purchaser/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. WHAT TO DO IF YOU SMELL GAS.
a. DO NOT try to light any appliance.
b. DO NOT touch any electrical switch.
c. DO NOT use any phone in your building.
d. Clear the room, building, or area of ALL occupants.
e. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’ s instructions.
f. If you cannot reach your gas supplier, call the fire department.
4. Installation and service must be performed by a qualified installer, service agency, or gas supplier .
5. Dryer(s) must be exhausted to the outdoors.
6. Although ADC produces a very versatile machine, there are some articles that, due to fabric composition or
cleaning method, should not be dried in it.
WARNING: Dry only water-washed fabrics. DO NOT dry articles spotted or washed in dry
cleaning solvents, a combustible detergent, or “all purpose” cleaner .
EXPLOSION COULD RESUL T .
WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,
wax.
EXPLOSION COULD RESUL T .
3
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 basket (tumbler) 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 and cleaning can best be determined from experience
at each location.
WARNING: The collection of lint in the burner area and exhaust duct work can create a
potential fire hazard.
8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the
National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION or in Canada, the Canadian Electrical
Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
NOTE: Failure to do so will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint door switch, heat safety circuit ever
be disabled.
W ARNING: PERSONAL INJURY or FIRE COULD RESUL T.
10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.
11. Remove articles from the dryer as soon as the drying cycle has been completed.
WARNING: Articles left in the dryer after the drying and cooling cycles have been completed
can create a fire hazard.
12. DO NOT operate steam dryers with more than 125 PSI (8.61 bars) steam pressure. Excessive steam
pressure can damage steam coil and/or harm personnel.
13.Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with leaking
flexible hoses. PERSONAL INJURY MAY RESULT.
14. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.
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 TO ALLOW ACCESS
FOR CLEANING , ADJUSTING, INST ALLA TION, or TESTING OF ANY
EQUIPMENT per OSHA (Occupational Safety and Health Administration)
STANDARDS.
4
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. SPECIFICATIONS
SECTION II
BASKET (
BASKET
BASKET
TUMBLER)
(TUMBLER)
(TUMBLER)
DIAMETER 37" 94 cm
DEP TH 36" 91.5 cm
MOT O R 1/2 HP .373 kw
BLOWER MOTOR 3 HP
DOOR OPENING
BASKET (T
UMBLER
(DIAMETER
) VO LU ME 22.4 cu. ft. .634 cu.m.
) 21-1/2" 54.61 cm
DRYERS P ER 20'/40' CO NTAINER 10/20
DRYERS PER 6m/12m CONTAINER 10/20
DRYERS P ER 45'/48' TRUCK 24/24
DRYERS PER 14m/15m TRUCK 24/24
VOLTAGE AVAILAB LE 208-460v 3ø 50/60 Hz
APPROX. WEIGHT
APPROX. WEIGHT
Gas
HEA T INPU T 270,000 btu/hr 68,040 k cal/hr
(UNCRATED
(CRATED
) 828 lbs. 375.6 kg
) 878 lbs. 398.3 kg
AIRFL OW 1,700 cfm 48.14 cmm
INLET PIPE SIZE 1" 2.54 cm
VOLTAGE AVAILAB LE 208-460v 3ø 50/60 Hz
2.238 kw
APPROX. WEIGHT
APPROX. WEIGHT
(UNCRATED
(CRATED
) 828 lbs. 392.7 kg
) 914 lbs. 415.5 kg
AIRFL OW 2,500 cfm 98.8 cmm
AIR CONNECTION 1/8" F.P.T. ---
Steam
STEAM CONSUMPTION
375 lbs/hr
170.5 kg/hr 11
BOILER HP
NORMAL LOAD
OPERATING STEAM PRESSURE STEAM SUPPLY STEAM RETURN
8.79
125 psi max
Shaded areas are st at ed metri c equi val ents
IMPORTANT: Steam dryers must be provided with a clean, dry , regulated 80 PSI +/- 10 PSI (5.51
bars +/- .68 bars) supply .
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
kg/cm
2
1" 2.54 cm 1" 2.54 cm
5
Specifications
MLG-82 (Gas)
MLS-82 (Steam)
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
6
B. COMPONENT IDENTIFICATION
1. Dryer Front View
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)
7
Dryer Rear View
2.
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 Tumbler Bearing Mount Assembly
5 Idler Bearing Mount Assembly
6 Basket (Drive) Motor Assembly (for Reversing Models Only)
7 Blower Motor Assembly
8 Dryer Exhaust
* Electric service connections for Gas Models and Steam Models are made in this box.
8
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 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
many years of efficient, trouble-free, and - most importantly - safe operation.
WARNING: LINT FROM MOST F ABRICS IS HIGHLY COMBUSTIBLE. THE
ACCUMULA TION OF LINT CAN CREA TE A POTENTIAL FIRE HAZARD.
WARNING: KEEP DRYER AREA CLEAR AND FREE FROM COMBUSTIBLE
MA TERIALS, GASOLINE, and OTHER FLAMMABLE VAPORS and
LIQUIDS.
NOTE: Suggested time intervals shown are for average usage which is considered six (6) to eight (8)
operational (running) hours per day .
SUGGESTED CLEANING SCHEDULE
EVERY THIRD or FOURTH LOAD
Clean the lint screen every third or fourth load. A clogged lint screen will cause poor dryer performance. The
lint screen is located behind the lint door in the base of the dryer. Open the lint door , brush the lint off of the lint
screen, and remove the lint. Inspect the lint screen and replace if torn.
NOTE: The frequency of cleaning the lint screens can best be determined from experience at each
location.
WEEKLY
Clean lint accumulation from the lint chamber, thermostat, and microprocessor temperature sensor (sensor
bracket) area.
WARNING: TO A V OID HAZARD OF ELECTRICAL SHOCK, DISCONTINUE
ELECTRICAL POWER SUPPL Y TO THE DRYER.
STEAM DRYERS
Clean the steam coil fins. Suggest using compressed air and a vacuum cleaner with brush attachment.
NOTE: When cleaning steam coil fins, be careful not to bend the fins. If the fins are bent,
straighten by using a fin comb, which is available from any local air conditioning supply house.
9
90 DAYS
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 ignitor assembly.
EVERY 6 MONTHS
Inspect and remove lint accumulation in customer furnished exhaust duct work system and from dryers internal
exhaust ducting.
NOTE: THE ACCUMULA TION OF LINT IN THE EXHAUST DUCT WORK CAN
CREA TE A POTENTIAL FIRE HAZARD.
NOTE: DO NOT OBSTRUCT THE FLOW OF COMBUSTION and VENTILATION AIR.
CHECK CUSTOMER FURNISHED BACK DRAFT DAMPERS IN THE EXHAUST
DUCT WORK. INSPECT and REMOVE ANY LINT ACCUMULA TION WHICH
CAN CAUSE THE DAMPER TO BIND or STICK.
NOTE: A back draft damper that is sticking partially closed can result in slow drying and shut-down
of heat circuit safety switches or thermostats.
NOTE: When cleaning the dryer cabinets, avoid using harsh abrasives. A product intended for the
cleaning of appliances is recommended.
B. ADJUSTMENTS
7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER
Inspect bolts, nuts, screws, (bearing set screws), nonpermanent gas connections (unions, shut-off valves, orifices,
and grounding connections). Motor and drive belts should be examined. Cracked or seriously frayed belts
should be replaced. Tighten loose V-belts when necessary. Complete operational check of controls and
valves. Complete operational check of ALL safety devices (door switches, lint drawer switch, sail switch,
burner and hi-limit thermostats).
C. LUBRICATION
The motor bearings, idler bearings, and under normal/most conditions the tumbler bearings are permanently
lubricated. It is physically possible to re-lubricate the tumbler bearings if you choose to do so even though this
practice is not necessary. Use Shell Alvania #3 grease or its equivalent. The tumbler bearings used in the dryer
does not have a grease fitting. Provisions are made in the bearing housing for the addition of a grease fitting
which can be obtained elsewhere.
10
SECTION IV
DESCRIPTION OF P ARTS
A. CONTROL PANEL ASSEMBLY
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 ASSEMBLY
The main door switch assembly is a safety device used to
stop the tumbler in case the main door is opened during a
cycle.
C. LINT DRAWER
AND LINT DRAWER SWITCH
The lint door/drawer is located in the bottom front of the
machine. It is a drawer that pulls out with a fine mesh
screen that catches the lint. The lint drawer switch is
another safety device to stop the basket from turning when
the lint drawer is opened.
11
D. THE BASKET AND SUPPORT
ASSEMBLY
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. TEMPERATURE SENSOR
BRACKET ASSEMBLY
This bracket assembly is equipped with two (2)
important devices. One is the temperature probe and
the other is the 225º F (107º C) basket hi-limit. The
temperature probe senses the temperature in the basket
and sends a signal to the computer to read that
temperature. This sensor is also known as the “TEMP
SENSOR FAIL” sensor. The 225º F (107º C)
thermostat is a safety device to shut down the gas valve
in a case of the temperature exceeding 225º F (107º
C).
F. TUMBLER BEARING ASSEMBLY
The bearing box is the holder for the pillow block bearing
and it also has the adjustments for the basket on it.
The bearings are what support the tumbler support and
basket to the dryer. The rotational sensor is another
safety device to stop the motor if it senses the basket
has stopped during a cycle.
12
G. IDLER ARM ASSEMBLY
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 MOUNT ASSEMBLY
The drive motor is used to turn the basket in the forward
and reverse motion. The fan mount assembly is used
to increase the speed of the blower motor which in turn
increases the cfm throughout the machine.
13
J. HSI (HOT SURFACE IGNITION)
BURNER BOX ASSEMBLY
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 ASSEMBLY
The sail switch assembly is used on gas and
electric heated machines. It is an airflow switch,
the damper pulls in due to the air suction on the
burner; making the switch which lets the voltage
proceed to the HSI (Hot Surface Ignition)
module.
L. FRONT PANEL ASSEMBLY
The front panel is a little different than our other models.
This one is the full height and width of the dryer.
14
M. REVERSING RELAY 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 protecting the
L1 and L3 voltage. The transformer is stepping
down the incoming voltage to 24 VAC to supply
the voltage to the computer and controls.
15
SECTION V
SERVICING
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 should be performed by competent technicians in accordance with local, state,
and federal codes. When contacting the factory for assistance, always have the dryer model and serial numbers
available.
CAUTION: Observe ALL safety precautions displayed on the dryer or specified in this manual before
and while making repairs.
Before considering replacement, make sure that ALL connectors are in place and making proper contact.
16
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