American Dryer Corp ML-75HS User Manual

ML-75HS

(Gas/Electric/Steam)

Installation Manual

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 death.

Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any
other appliance.

WHAT DO YOU DO IF YOU SMELL GAS

* Do not try to light any appliance.
* Do not touch any electrical switch; do not use

any phone in your building.

* Clear the room, building or area of all

occupants.

* Immediately call your gas supplier from a

neighbor's phone. Follow the gas supplier's
instructions.

* If you cannot reach your gas supplier, call the

fire department.

Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.

AVERTISSEMENT: Assurez-vous de bien
suivre les instructions données dans cette
notice pour réduire au minimum le risque
d’incendie ou d’explosion ou pour éviter tout
dommage matériel, toute blessure ou la mort.

Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:

* Ne pas tenter d’allumer d’appareil.
* Ne touchez à aucun interrupteur. Ne pas

vous servir des téléphones se trouvant dans

le bâtiment où vous vous trouvez..
* Évacuez la pièce, le bâtiment ou la zone.
* Appelez immédiatement votre fournisseur de

gaz depuis un voisin. Suivez les instructions

du fournisseur.
* Si vous ne pouvez rejoindre le fournisseur

de gaz, appelez le service des incendies.

L’installation et l’entretien doivent être assurés
par un installateur ou un service d’entretien
qualifié ou par le fournisseur de gaz.

051697SL/tf

For replacement parts, contact the distributor from which the dryer

was purchased or

American Dryer Corporation

88 Currant Road

Fall River MA 02720-4781

Telephone: [phone] / Fax: [phone]

E-mail: [e-mail]

ADC Part No. 113001

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 ou liquides
inflammables dans le voisinage de cet
appareil ou de yout autre appareil.

Important

For your convenience, log the following information:

DATE OF PURCHASE MODEL NO.

DISTRIBUTORS NAME

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 [phone] or telephone your orders directly to the ADC Parts Department at
[phone]. 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.

“IMPORTANT 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 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.

«Attention: Lor des opérations d’entretien

“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
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

DRYER(S) SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.

WARNING

CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYER(S).

CHILDREN SHOULD BE SUPERVISED IF NEAR DRYER(S) IN OPERATION.

FOR YOUR SAFETY

DO NOT DRY MOP HEADS IN THE DRYER.

DO NOT USE DRYER IN THE PRESENCE OF DRY 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 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/operator's manual included with the dryer.

Dryer(s) must not be installed or stored in an area where it will be exposed to water and/or
weather.

The wiring diagram for the dryer is located in the front electrical control box area.

Table of Contents

SECTION I

IMPORTANT INFORMATION ............................................................................... 3

A. Receiving and Handling ............................................................................................................... 3

B. Safety Precautions ....................................................................................................................... 3

SECTION II

SPECIFICATIONS .................................................................................................... 6

A. Specifications .............................................................................................................................. 6

B. Component Identification ............................................................................................................. 8

SECTION III

INSTALLATION PROCEDURES ......................................................................... 10

A. Location Requirements .............................................................................................................. 10

B. Unpacking/Setting Up ............................................................................................................... 11

C. Dryer Enclosure Requirements .................................................................................................. 12

D. Fresh Air Supply ....................................................................................................................... 13

E. Exhaust Requirements ............................................................................................................... 14

F. Electrical Information ................................................................................................................ 19

G. Gas Information ........................................................................................................................ 27

H. Steam Information ..................................................................................................................... 30

I. Preparation For Operation/Start-up .......................................................................................... 36

J. Preoperational Tests .................................................................................................................. 37

K. Preoperational Instructions ........................................................................................................ 39

L. Shut Down Instructions .............................................................................................................. 40

SECTION IV

SERVICE/PARTS INFORMATION ......................................................................41

A. Service ..................................................................................................................................... 41

B. Parts ......................................................................................................................................... 41

SECTION V

WARRANTY INFORMATION .............................................................................. 42

A. Returning Warranty Card(s) ...................................................................................................... 42

B. Parts ......................................................................................................................................... 42

C. Returning Warranty Card(s) ...................................................................................................... 42

SECTION VI

ROUTINE MAINTENANCE ..................................................................................4 4

A. Cleaning ................................................................................................................................... 44

B. Adjustments .............................................................................................................................. 45

SECTION VII
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT

COMPONENTS ....................................................................................................... 46

SECTION VIII

REVERSING TIMER SPIN/DWELL ADJUSTMENTS ....................................49

SECTION IX

TECHNICAL INFORMATION ..............................................................................50

Data Label ..................................................................................................................................... 50

SECTION I

IMPORTANT INFORMATION

A. RECEIVING and HANDLING

The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover (or
optional box) as a means of preventing damage in transit. Upon delivery, the dryer and/or packaging, and wooden
skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect further
before delivering carrier leaves.

Dryers damaged in shipment.

1. ALL dryers should be inspected upon receipt and before they are signed for.

2. If there is suspected damage or actual damage, the trucker's receipt should be so noted.

3. If the dryer is damaged beyond repair, it should be refused. Those dryers which were not damaged in a
damaged shipment should be accepted, but the number received and the number refused must be noted
on the receipt.

4. If you determine that the dryer was damaged after the trucker has left your location, you should call the
delivering carrier's freight terminal immediately and file a claim. The freight company considers this
concealed damage. This type of freight claim is very difficult to get paid and becomes extremely difficult
when more than a day or two passes after the freight was delivered. It is your responsibility to file freight
claims. Dryer/parts damaged in transit cannot be claimed under warranty.

5. Freight claims are the responsibility of the consignee, and ALL claims must be filed at the receiving end.
ADC assumes no responsibility for freight claims or damages.

6. If you need assistance in handling the situation, please contact the ADC Traffic Manager at
[phone].

IMPORTANT: The tumbler section of the dryer must be transported and handled in an upright

position at all times.

3

B. 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 RESULT.

WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil,

paint, wax. EXPLOSION COULD RESULT.

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.

4

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 Electric Code ANSI/NFPA NO. 70-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.

WARNING: PERSONAL INJURY or FIRE COULD RESULT.

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 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. The normal PH level for copper type steam coils must be maintained between a value of 8.5 to 9.5.
For steel type steam coils the PH level must be maintained between a value of 9.5 to 10.5. These
limits are set to limit the acid attack of the steam coils.

IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY.

15. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.

WARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and
THE GAS 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.

5

SPECIFICATIONS/COMPONENT IDENTIFICATION

A. SPECIFICATIONS

BASKET DIAMETER 37" 94 cm
BA S KET DE PTH 36"
BASKET MOTOR 1 HP*
DOOR OPENING (Diameter) 31-3/8"
BASKET VOLUME 22.4 cu. ft.
DRYERS PER 20’/40’ CO NTAINER 10 /20
DRYERS PER 45’/48" T RUCK 24/ 24

VOLTAGE AVAILABLE 120-46 0v / 1Ø-3Ø / 50/60 Hz

APPRO X. WEIGHT (Uncra ted) 721 lbs.
APPROX. WE IGHT (Crat ed) 771 lbs.
HEAT IN P UT 200, 000 btu/ hr

Gas

AIRFLOW 1,20 0 cfm
INLET PIPE SIZE 3/4**
VOLTA GE AVAILA BLE 208-46 0v / 1Ø-3Ø / 50/60 Hz
APPRO X. WEIGHT (Uncra ted) 721 lbs.
APPROX. WE IGHT (Crat ed) 771 lbs.
AIRFLOW 1,20 0 cfm

Electric

VOLTA GE AVAILA BLE 120-46 0v / 1Ø-3Ø / 50/60 Hz
APPRO X. WEIGHT (Uncra ted) 757 lbs.
APPROX. WE IGHT (Crat ed) 807 lbs.
AIRFLOW 1,35 0 cfm
COMPRESSED AIR V OLUME .75 cfh
AIR CONNECTION 1/8" F.P.T.

Steam

STEAM CONSUMPTION

238.7 lbs./hr

OPERATING STEAM PRESSURE STEAM SUPPLY STEAM SUPPLY

125 psi ma x

SECTION II

91.5 cm
.746 kw

79.7 cm

.634 cu .m.

327 kg

349.7 kg

50,400 kcal/hr

33.98 cmm

1.91 cm

327 kg

349.7 kg

33.98 cmm

343.4 kg

366.1 kg

38.23 cmm
.02 cmh
.318 cm

BOILER HP NORMAL

LOAD

108.3 kg /hr 7

8.6 kg/s q cm 1" 2.54 cm 1" 2.54 cm

* For non-reversing models.
** A minimum of 3/4" pipe must be supplied to the gas inlet for each dryer.

Shaded areas are stated in metric equivalents.

IMPORTANT: Steam dryers must be provided with clean, dry, regulated 80 PSI (+/- 10 psi)

air supply.

NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT

ANY TIME, WITHOUT NOTICE or OBLIGATION.

6

Specifications

MLG-75HS

MLE-75

MLS-75

NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT

ANY TIME, WITHOUT NOTICE or OBLIGATION.

7

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 Data Label and Installation Label (located behind control [service] door)

8

1. DRYER REAR VIEW

Illus. No. Description

1 Heating Unit
2 1/8" Compressed Air Supply Inlet

(behind Electric Service Relay Box for steam units ONLY)
3* Electric Service Relay Box
4 Tumbler Bearing Mount Assembly
5 Idler Bearing Mount Assembly
6 Blower Motor Assembly
7 Leveling Leg (rear)
8 Basket (Drive) Motor Assembly (Reversing Models ONLY)
9 Dryer Exhaust

* Electric service connections for Gas & Steam Models are made in this box.

NOTE: 1/8-inch Compressed Air Supply Inlet (for Steam Models ONLY) is located behind

the Electric Service Relay Box.

9

SECTION III

INSTALLATION PROCEDURES

Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installation must conform to applicable American National Standards: National Fuel
Gas Code ANSI.Z223.1-LATEST EDITION and/or National Electric Code ANSI/NFPA NO. 70-LATEST
EDITION.

A. LOCATION REQUIREMENTS

Before installing the dryer, be sure the location conforms to local codes and ordinances. In the absence of such
codes or ordinances the location must conform with the National Fuel Gas Code ANSI.Z223.1-LATEST
EDITION.

1. The dryer must be installed on a sound level floor capable of supporting its weight. It is recommended that

carpeting be removed from the floor area that the dryer is to rest on.

2. The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.

3. The dryer is for use in noncombustible locations.

4. Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply in
Section D).

5. Clearance provisions must be made from combustible construction as noted in this manual (refer to Dryer
Enclosure Requirements in Section C).

6. Provisions must be made for adequate clearances for servicing and for operation as noted in this manual
(refer to Dryer Enclosure Requirements in Section C).

7. Dryer must be exhausted to the outdoors (refer to Exhaust Requirements in Section E).

8. Dryer must be located in an area where correct exhaust venting can be achieved as noted in the manual
(refer to Exhaust Requirements in Section E).

IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be necessary.

10

B. UNPACKING/SETTING UP

Remove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer.

IMPORTANT: Dryer must be transported and handled in an upright position at all times.

The dryer can be moved to its final location while still attached to the skid or with the skid
removed. To unskid the dryer, locate and remove the four (4) bolts securing the base of the dryer to the wooden
skid. Two (2) are at the rear base (remove the back panel for access), and two (2) are located in the bottom of
the lint chamber. To remove the two (2) bolts located in the lint chamber area, remove the lint door.

With the skid removed, to make it easier to slide the dryer into its final position, slightly lower ALL four (4)
leveling legs, so that the dryer will slide on the legs instead of the base frame.

To increase bearing life and improve efficiency, the dryer should be tilted slightly to the rear.

The basket (tumbler) is supported during shipping by a wooden block. REMOVE THIS BLOCK BEFORE
STARTING THE DRYER.

IMPORTANT: For microprocessor (computer) models, this wooden block must be removed

before connecting power to the dryer or irreparable damage to the basket
(tumbler) will result.

The lint coops of ALL ML-75 dryers are supported during shipping by a bracket. REMOVE THIS BRACKET
BEFORE STARTING THE DRYER.

1. Leveling Dryer

The dryer is equipped with four (4) leveling legs, one at each corner of the base. Two (2) are located at
the rear of the dryer base, and two (2) are located in the lint chamber (coop). To increase bearing life and

improve efficiency, the dryer should be tilted slightly to the rear.

11

C. DRYER ENCLOSURE REQUIREMENTS

Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
twelve (12) inches (18-inches or more is recommended for ease of installation, maintenance , and service) above
the dryer outer top, except along the front of the dryer which may be partially closed in if desired. The clearance
between the bulkhead header and the dryer must be a minimum of four (4) inches and must not extend more
than four (4) inches to the rear of the front. The bulkhead facing must not be closed in all the way to the top of
the dryer. A one (1) inch clearance is required.

NOTE: Allowances must be made for opening the control door.

Dryers may be positioned side wall to side wall. However, a 1/16" minimum allowance must be made for
opening and closing of the control door and the lint door. It is suggested that the dryer be positioned about two
(2) feet away from the nearest obstruction for ease of installation, maintenance, and service (to be measured
from the back guard.) (Refer to the illustration above for details.)

NOTE: Air considerations are important for proper and efficient operation.

IMPORTANT: Even though a minimum of only 12-inches is required, 18-inches or more is

suggested. The additional clearance is advantageous for ease of installation and
service.

IMPORTANT: When fire sprinkler systems are located above the dryers, a minimum of

18-inches above the dryer console (module) is required. Dryers may be
positioned side wall to side wall however, a 1/16-inch minimum allowance is
required between dryers (or wall) for ease of installation and maintenance.
Allowances must be made for the opening and closings of the control door and
the lint door.

12

D. FRESH AIR SUPPLY

When the dryer is operating, it draws in room air, heats it, passes this air through the basket (tumbler), and
exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If
the make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems
and sail switch "fluttering" problems may result, as well as premature motor failure from overheating.

Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An air flow of 1,200 cfm (cubic feet per minute) must be
supplied to each gas and electric dryer and 1,350 cfm (cubic feet per minute) must be supplied to each steam
dryer. As a general rule, an unrestricted air entrance from the outdoors (atmosphere) of a minimum of 1-1/2
square feet is required for each dryer.

T o compensate for the use of registers or louvers used over the openings, this make-up air must be increased by
approximately thirty-three percent (33%). Make-up air openings should not be located in an area directly near
where exhaust vents exit the building.

It is not necessary to have a separate make-up air opening for each dryer. Common make-up air openings are
acceptable. However, they must be set up in such a manner that the make-up air is distributed equally to
the dryers.

EXAMPLE: For a bank of four (4) dryers, two (2) unrestricted openings measuring 2 feet by

1-1/2 feet (6 square feet) is acceptable.

Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.

ALL

IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes.

Make-up air that is contaminated by dry cleaning solvent fumes will result in
irreparable damage to motors and other dryer components.

NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.

13