American Dryer Corp. AD-285 User manual

AD-285 Installation Manual
Phase 7 / S.A.F.E. System
ADC Part No. 113235-5
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781 USA
Telephone: [phone] / Fax: [phone]
e-mail: [e-mail]
www.amdry.com
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 à proximité de cet
appareil ou de tout autre appareil.
—QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ:
●Ne pas tenter d’allumer d’appareils.
●Ne touchez à aucun interrupteur. Ne
pas vous servir des téléphones se
trouvant dans le bâtiment.
●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.
WARNING: For your safety the
information in this manual must be
followed to minimize the risk of fire or
explosion and to prevent property
damage, personal injury or death.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO 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.

AD-285 PH7
“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.
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. The illustrations included in this manual may not depict your particular dryer exactly.
Important
For your convenience, log the following information:
DATE OF PURCHASE _______________________________________________________ MODEL NO. ________________________
RESELLER’S NAME _____________________________________________________________________________________________
Serial Number(s) ______________________________________________________________________________________________
______________________________________________________________________________________________
______________________________________________________________________________________________
Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement parts from the factory, you
can FAX your order to ADC at [phone] or telephone your order directly to the ADC Parts Department at +1 (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.
Retain This Manual In ASafe 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 efficient, trouble free, and most importantly, safe 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 posted near the dryer in a prominent location.
FOR YOUR SAFETY
Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables à proximité de cet
appareil ou de tout autre appareil.

IMPORTANT
YOU MUST DISCONNECT AND LOCK OUT 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.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE
DRYER(S).
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERATION.
CAUTION
DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.
FOR YOUR SAFETY
DO NOT DRY MOP HEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.
“Caution: Label all wires prior to
disconnection when servicing
controls. Wiring errors can cause
improper operation.”
«Attention: Au moment de l’entretien des
commandes, étiquetez tous les fils avant de les
débrancher. Des erreurs de câblage peuvent entraîner
un fonctionnement inadéquat et dangereux.»
WARNING
UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch,
or heat safety circuit ever be disabled.
Proposition 65
Use of this product could expose you to substances from fuel combustion
that contain chemicals known to the State of California to cause cancer,
birth defects and other reproductive harm.
▲ WARNING
!

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.
IMPORTANT
PLEASE OBSERVE ALLSAFETY PRECAUTIONS displayed on the equipment and/
or specified in the installation manual included with the dryer.
WARNING
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN
IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
Dryer 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.
IMPORTANT
Dryer must be installed in a location/environment, which the ambient temperature
remains between 40° F (4.44° C) and 130° F (54.44° C).

Table of Contents
SECTION I
SAFETY PRECAUTIONS................................................................................................. 3
SECTION II
SPECIFICATIONS............................................................................................................. 5
SECTION III
INSTALLATION PROCEDURES .................................................................................... 7
A. Unpacking/Setting Up ...................................................................................................................... 7
B. Location Requirements ..................................................................................................................... 8
C. Dryer Enclosure Requirements ......................................................................................................... 9
D. Fresh Air Supply Requirements...................................................................................................... 10
E. Exhaust Requirements .....................................................................................................................11
F. Electrical Information ..................................................................................................................... 16
G. Gas Information .............................................................................................................................. 20
H. Preparation for Operation and Start-Up.......................................................................................... 24
I. Preoperational Test ......................................................................................................................... 25
J. Preoperational Instructions ............................................................................................................. 26
K. Shutdown Instructions .................................................................................................................... 28
SECTION IV
SERVICE AND PARTS INFORMATION ..................................................................... 29
A. Service ............................................................................................................................................ 29
B. Parts ................................................................................................................................................ 29
SECTION V
WARRANTY INFORMATION ...................................................................................... 30
A. Returning Warranty Cards .............................................................................................................. 30
B. Warranty.......................................................................................................................................... 30
C. Returning Warranty Parts................................................................................................................ 30
SECTION VI
ROUTINE MAINTENANCE .......................................................................................... 32
A. Cleaning .......................................................................................................................................... 32
B. Adjustments .................................................................................................................................... 33
C. Lubrication...................................................................................................................................... 33

SECTION VII
DATA LABEL INFORMATION ..................................................................................... 34
SECTION VIII
PROCEDURE FOR FUNCTIONAL CHECK
OF REPLACEMENT COMPONENTS ......................................................................... 35
SECTION IX
SENSOR ACTIVATED FIRE EXTINGUISHING (S.A.F.E.) SYSTEM ..................... 38

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SECTION I
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 or 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. Dryers must be exhausted to the outdoors.
6. Although ADC produces a very versatile dryer, 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, or wax. EXPLOSION COULD RESULT.
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create
a fire hazard.

4 American Dryer Corp. 113235- 5
WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or
similarly textured rubberlike materials. Drying in a heated basket (tumbler) may
damage plastics or rubber and may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust ductwork,
and area around the back of 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 ductwork 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 electrically ground the dryer properly will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switch, lint drawer switch, or heat safety circuit
ever be disabled.
WARNING: PERSONAL INJURY OR FIRE COULD RESULT should the dryer door
switch, lint door switch, or heat safety circuit ever be disabled.
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. READ AND FOLLOWALL CAUTION AND DIRECTION LABELS ATTACHED TO THE DRYER.
13. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%), 20 lb (9.07 kg) of its rated capacity.
WARNING: YOU MUST DISCONNECT AND LOCK OUT 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.
IMPORTANT: Dryer must be installed in a location/environment, which the ambient
temperature remains between 40º F (4.44º C) and 130º F (54.44º C).

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SECTION II
SPECIFICATIONS
Shaded areas are stated in metric equivalents 4/2/07
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
MAXIMUM CAPACITY (DRY WEIGHT) 30 lb 13.6 kg
TUMBLER DIAMETER 27-1/4” 69.22 cm
TUMBLER DEPTH 30” 76.2 cm
TUMBLER VOLUME 10.18 cu ft 288.27 L
TUMBLER/DRIVE MOTOR 1/2 ” hp 0.373 kW
BLOWER/FAN MOTOR N / A
DOOR OPENING (DIAMETER) 21 -1 /2” 54.61 cm
DOOR SILL HEIGHT 26-3/8” 67 cm
WATER CONNECTION 3/4 ”-11.5 NH
(North America)
3/4” B.S.P.T. (Outside North America)
DRYERS PER 20’/40’ CONTAINER 14 / 3 0
DRYERS PER 48’/53’ TRUCK 36 / 38
VOLTAGE AVAILABLE 120-480V 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 455 lb 206.4 kg
APPROXIMATE SHIPPING WEIGHT 500 lb 226.8 kg
AIRFLOW 60 Hz 375 cfm 11 cmm
50 Hz 313 cfm 8.85 cmm
HEAT INPUT 72,000 Btu/hr 18,144 kcal/hr
EXHAUST CONNECTION (DIAMETER) 6” 15.24 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
INLET PIPE CONNECTION 1/2” N.P.T.
1/2” B.S.P.T.
(CE and Australia Only)
VOLTAGE AVAILABLE
N / A
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
OVEN SIZE
kW Btu/hr kcal/hr
VOLTAGE AVAILABLE
N / A
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
STEAM CONSUMPTION
OPERATING STEAM PRESSURE
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
BOILER HORSEPOWER (NORMAL LOAD)
SUPPLY CONNECTION
RETURN CONNECTION
Gas
Electric
Steam

6 American Dryer Corp. 113235- 5
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
Specifications

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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:ANSI Z223.1-
LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electrical
Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-M91
(Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION (for General
Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION
(for Electrical Connections).
A. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.
IMPORTANT: Dryer must be transported and handled in an upright position at ALL times.
NOTE: For non-coin dryer models equipped with locks, the lock used is a dummy lock and no
key is supplied or needed. The lock can be turned with any key, a screwdriver, a small
coin, or any small sharp object. For coin-operated dryers, the MK-100 (master key for
both the control door and lint door) should be made accessible because it will be needed
throughout various phases in the installation of the dryer.
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.
Leveling Dryer
The dryer is equipped with four (4) leveling legs, one (1) 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.

8 American Dryer Corp. 113235- 5
B. 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, or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-
M91 (Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION (for General
Installation and Gas Plumbing).
1. The dryer must be installed on a sound level floor capable of supporting its weight. Carpeting must be
removed from the floor area that the dryer is to rest on.
IMPORTANT: “The dryer must be installed on noncombustible floors only.”
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
Requirements 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. The dryer must be installed with a proper exhaust duct connection to the outside as noted in this manual
(refer to Exhaust Requirements in Section E).
8. The dryer must be located in an area where correct exhaust venting can be achieved as noted in this
manual (refer to Exhaust Requirements in Section E).
IMPORTANT: The dryer should be located where a minimum amount of exhaust duct will be
necessary.
9. The dryer must be installed with adequate clearance for air openings into the combustion chamber.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every
6 months, inspect the exhaust ducting and remove any lint build up.
IMPORTANT: The dryer must be installed in a location/environment, which the ambient
temperature remains between 40° F (4.44° C) and 130° F (54.44° C).

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C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
12-inches (30.48 cm) above the dryer’s outer top; except along the front of the dryer, which may be closed if
desired.
NOTE: Allowances must be made for opening the control door.
X = 12-inch (30.48 cm) minimum, 24-inches (60.96 cm) is suggested for ease of maintenance.
NOTE: Air considerations are important for proper and efficient operation.
Dryers may be positioned sidewall to sidewall. However, a 1/16” (1.5875 mm) minimum allowance must be
made for the opening and closing of the control door and the lint door. It is suggested that the dryer be positioned
about 2 feet (0.61 meters) 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.

10 American Dryer Corp. 113235- 5
D. FRESH AIR SUPPLYREQUIREMENTS
The dryer air supply (make-up air) must be given careful consideration to ensure proper performance of each
dryer. An unrestricted source of air is necessary for each dryer. An airflow of 375 cfm (cubic feet per minute)
(11 cmm [cubic meters per minute]) must be supplied to each gas dryer. As a general rule, an unrestricted air
entrance from the outdoors (atmosphere) of a minimum of 1 square foot (0.09 square meters) is required for
each dryer. If registers or louvers are installed over the openings, then the area must be increased. 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. The
dryer must be installed with provisions for adequate combustion and make-up air supply.
EXAMPLE: For a bank of eight (8) dryers, two (2) unrestricted openings measuring 2 feet by 2 feet
(0.61 meters by 0.61 meters) are acceptable.
IMPORTANT: Make-up air openings should not be located in an area directly near where
exhaust vents exit the building.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
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 the motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.

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E. EXHAUST REQUIREMENTS
Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork
will create excessive back pressure, which results in slow drying, increased use of energy, and shutdown of the
burner by the airflow (sail) switch, burner hi-limit, or lint chamber hi-heat protector thermostat. The dryer
must be installed with a proper exhaust duct connection to the outside.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors.
When possible, it is suggested to provide a separate (single) exhaust duct for each dryer.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN
CREATE APOTENTIAL FIRE HAZARD.
IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust
ductwork system.
The exhaust ductwork should be laid out in such a way that the ductwork travels as directly as possible to the
outdoors with as few turns as possible. The shape of the ductwork is not critical as long as the minimum cross
section area is provided. Single or independent dryer venting is recommended.
It is suggested that the use of 90º turns be avoided; use 30º or 45º angles instead.
The ductwork should be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the ducts to be added should overlap the duct to which it is connected.
ALL ductwork joints must be taped to prevent moisture and lint from escaping into the building. Additionally,
inspection doors should be installed at strategic points in the exhaust ductwork for periodic inspection and
cleaning.
IMPORTANT: When connecting ductwork to the dryer exhaust duct, be sure that when screws
are used they DO NOT restrict the operation (both opening and closing) of the
damper.
NOTE: When the exhaust ductwork passes through a wall, ceiling, or roof made of combustible
materials, the opening must be 2 inches (5.08 cm) larger than the duct (all the way
around). The duct must be centered within this opening.
To protect the outside end of the horizontal ductwork from the weather, a 90º elbow bent downward should be
installed where the exhaust exits the building. If the ductwork travels vertically up through the roof, it should
be protected from the weather by using a 180º turn to point the opening downward. In either case, allow at least
twice the diameter of the duct between the duct opening and the nearest obstruction (i.e., roof or ground level).
IMPORTANT: DO NOT use screens, louvers, or caps on the outside opening of the exhaust
ductwork.
IMPORTANT: Exhaust back pressure measured by a manometer at the dryer exhaust duct area
must be no less than 0 and must not exceed 0.3 inches (0.74 mb) of water
column (W.C.).

12 American Dryer Corp. 113235- 5
NOTE: As per the National Fuel Gas Code, “Exhaust ducts for type 2 clothes dryers shall be
constructed of sheet metal or other noncombustible material. Such ducts shall be
equivalent in strength and corrosion resistance to ducts made of galvanized sheet steel
not less than 26 gauge (0.0195-inches [0.50 mm]) thick.”
SINGLE DRYER VENTING
IMPORTANT: For exhaust duct runs over 40 feet (12 meters) a minimum size of 10-inches
(25.4 cm) must be used.
HORIZONTAL VENTING
When horizontal single 8-inch (20.32 cm) venting is used, the ductwork to the outlet cannot exceed 40 feet (12
meters) refer to Illus. A below. This calculation of 40 feet (12 meters) compensates or allows for the use of a
maximum of two (2) elbows.
Illus. A

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VERTICAL VENTING
When vertical single venting is used, the minimum duct size is 8-inches (20.32 cm), refer to Illus. B below, the
ductwork from the dryer to the outside outlet cannot exceed 60 feet (18 meters), refer to Illus. B below. This
calculation compensates for the use of a maximum of two (2) elbows. These are the two (2) elbows that create
the 180º (turned downward) outside outlet.
Illus. B
If the length of the duct run or quantity of elbows used exceeds the above noted specifications, the cross section
area of the ductwork must be increased in proportion to the number of elbows or duct run added.
IMPORTANT: For extended ductwork runs, the cross section area of the duct can only be
increased to an extent. For extended ductwork runs, a professional heating,
ventilating, and air-conditioning (HVAC) firm should be consulted for proper
venting information.
IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust
ductwork system.

14 American Dryer Corp. 113235- 5
MULTIPLE DRYER (COMMON) VENTING
HORIZONTAL VENTING
If it is not feasible to provide separate exhaust ducts for each dryer, ducts for individual dryers may be channeled
into a common main duct. Each dryer is provided with a back draft damper. The individual ducts should enter
the bottom or side of the main duct at an angle not more than 45º in the direction of the airflow. No more than
eight (8) dryers should be connected to one (1) main common duct run.
The main common duct may be any shape as long as the minimum cross-sectional area is provided. The main
duct should be tapered with the diameter increasing before each individual 8-inch (20.32 cm) duct is added
(refer to Illus. C below and Illus. D on page 15).
Illus. C
Horizontal venting must not exceed 35 feet (10.7 meters), this calculation compensates for the use of a maximum
of only one (1) elbow, which is the outside outlet protection.
NOTE: Distance between dryer single ducts being connected to the main common duct must be
a minimum of 28-1/2” (72.39 cm) dryer width.
Ductwork should be laid out in such a manner where allowances are made at rear area of
the dryer for removal of rear service panels or guards.
Illus. C (refer to the above illustration) shows the minimum cross section area for horizontal multiple dryer
venting. These figures must be increased in proportion if the main duct run from the last dryer to where it
exhausts has numerous elbows or is unusually long.

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IMPORTANT: For extended ductwork runs, the cross section area of the duct can only be
increased to an extent. For extended ductwork runs, a professional heating,
ventilating, and air-conditioning (HVAC) firm should be consulted for proper
venting information.
VERTICAL VENTING
Illus. D
The maximum length of venting from the last dryer to where it exhausts.
Vertical venting must not exceed 25 feet (7.6 meters), this calculation compensates for the use of a maximum
of three (3) elbows including the two (2) elbows creating the 180º (turned downward) outside outlet protection.
IMPORTANT: No more than eight (8) dryers maximum should be connected to one (1) main
common duct with a vertical run.
NOTE: Distance between dryer single ducts being connected to the main common duct must be
a minimum of 28-1/2” (72.39 cm) dryer width.
Ductwork should be laid out in such a manner where allowances are made at rear area of
the dryer for removal of rear service panels or guards.
Illus. D (refer to the above illustration) shows the minimum cross section area for vertical multiple dryer
venting. These figures must be increased in proportion if the main duct run from the last dryer to where it
exhausts has numerous elbows or is unusually long.
IMPORTANT: For extended ductwork runs, the cross section area of the duct can only be
increased to an extent. For extended ductwork runs, a professional heating,
ventilating, and air-conditioning (HVAC) firm should be consulted for proper
venting information.

16 American Dryer Corp. 113235- 5
F. ELECTRICAL INFORMATION
1. Electrical Requirements
ALL electrical connections must be made by a properly licensed and competent electrician. This is
to ensure that the electrical installation is adequate and conforms to local and state regulations or codes. In
the absence of such codes, ALL electrical connections, materials, and workmanship must conform to the
applicable requirements of 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.
IMPORTANT: Failure to comply with these codes or ordinances, and/or the requirements
stipulated in this manual can result in personal injury or component failure.
NOTE: Component failure due to improper installation will VOID THE WARRANTY.
Each dryer should be connected to an independently protected branch circuit. The dryer must be connected
with copper wire only. DO NOT use aluminum wire, it could create a fire hazard. The copper conductor
wire/cable must be of proper ampacity and insulation in accordance with electric codes for making ALL
service connections.
NOTE: The use of aluminum wire will VOID THE WARRANTY.
IMPORTANT: A separate protected circuit must be provided to each dryer.
NOTE: An individual ground circuit must be provided to each dryer, do not daisy chain.
IMPORTANT: The dryer must be connected to the electric supply shown on the data label. In
the case of 208 VAC or 240 VAC, the supply voltage must match the electric
service specifications of the data label exactly.
IMPORTANT: The wire size must be properly sized to handle the related current.
WARNING: 208 VAC AND 240 VAC ARE NOT THE SAME. Any damage done to dryer
components due to improper voltage connections will automatically VOID THE
WARRANTY.
NOTE: Component failure due to improper voltage application will VOID THE WARRANTY.
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.