American Dryer Corp. AD-81 III User manual

111902JEV/mcronan ADCPartNo.113159
AmericanDryerCorporation
88Currant Road
FallRiverMA02720-4781
Telephone:[phone] / Fax: [phone]
E-mail: [e-mail]
www.amdry.com
AD-81 III Installation Manual
Gas/Steam Models/Phase 7
WARNING: Foryoursafetytheinformationin
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
vapors and liquids in the vicinity of this or any
otherappliance.
—WHAT TO DO IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch any electrical switch; do not
useany phone in yourbuilding.
•Cleartheroom, building or area of all
occupants.
•Immediatelycall your gas supplierfrom a
neighbor’s phone. Follow the gas supplier’s
instructions.
•Ifyoucannot reach your gas supplier, call
thefire department.
—Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
AVERTISSEMENT: Assurez-vous de bien
suivrelesinstructions données danscettenotice
pour réduire au minimum le risque d’incendie
ou d’explosion ou pour éviter tout dommage
matériel,toute blessure ou lamort.
—Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables à
proximité de cet appareil ou de tout autre
appareil.
—QUEFAIRESIVOUSSENTEZUNEODEUR
DEGAZ:
•Ne pas tenter d’allumer d’appareils.
•Netouchezà aucun interrupteur. Ne pas
vous servir des téléphones se trouvant dans
lebâtiment.
•Évacuez la pièce, le bâtiment ou la zone.
•Appelezimmédiatementvotrefournisseur
degazdepuisunvoisin. Suivezles
instructionsdufournisseur.
•Sivous ne pouvez rejoindrele fournisseur
de gaz, appelez le service des incendies.
—L’installationetl’entretiendoiventêtreassuréspar
un installateur ou un service d’entretien qualifié
ouparlefournisseurde gaz.

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.
OBSERVEALLSAFETY PRECAUTIONSdisplayedontheequipmentorspecifiedintheinstallationmanualincludedwith
the dryer.
Thefollowing “FORYOURSAFETY” cautionmust be posted near the dryer in a prominent location.
“IMPORTANTNOTE TOPURCHASER”
Informationmust beobtained from your local gas supplier ontheinstructions
to be followed if the user smells gas. These instructionsmust be postedin a
prominentlocationnearthedryer.
FORYOUR SAFETY
Do not store or use gasoline or
otherflammable vapors and
liquidsinthevicinity 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
appareiloudetoutautre appareil.
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:
DATEOFPURCHASE _______________________________ MODEL NO. __________________________________________
RESELLER’SNAME _______________________________________________________________________________________
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 theADC Parts Department at (508)
678-9000. Please specify the dryer model number andserialnumberin addition to thedescription andpart number, so that
your order is processed accurately and promptly.
AD-81 III

WARNING
UNDER NO CIRCUMSTANCES should the dryer door switch, lint drawer switch, or
the heat circuit safety devices ever be disabled.
IMPORTANT
YOUMUSTDISCONNECTANDLOCKOUTTHEELECTRICSUPPLYANDTHEGAS
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 Safetyand HealthAdministration) STANDARDS.
WARNING
CHILDRENSHOULD NOTBEALLOWEDTOPLAYONORNEARTHEDRYER(S).
CHILDRENSHOULDBESUPERVISEDIFNEARDRYERSINOPERATION.
CAUTION
DRYERSSHOULDNEVER BELEFT UNATTENDEDWHILEINOPERATION.
FORYOURSAFETY
DONOTDRY MOPHEADS INTHEDRYER.
DONOTUSEDRYER INTHE PRESENCEOF DRYCLEANING 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
inadéquatet dangereux.»

WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panelsremoved. PERSONAL INJURY OR FIRE COULD RESULT.
IMPORTANT
PLEASE OBSERVEALLSAFETYPRECAUTIONSdisplayedonthe equipmentand/or
specified in the installation manual included with the dryer.
WARNING
DRYERMUSTNEVERBEOPERATEDWITHOUTTHELINT FILTER/SCREEN IN
PLACE,EVENIFANEXTERNALLINTCOLLECTIONSYSTEMISUSED.
Dryer must not beinstalled or stored in an area where it willbe 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
SECTIONI
SAFETYPRECAUTIONS ....................................................................................................2
SECTIONII
SPECIFICATIONS/COMPONENTIDENTIFICATION .....................................................4
A. Specifications.................................................................................................................................... 4
B. Component Identification .................................................................................................................. 6
SECTIONIII
INSTALLATIONPROCEDURES ........................................................................................8
A. Location Requirements ..................................................................................................................... 8
B. Unpacking/Setting Up ....................................................................................................................... 9
C. Dryer Enclosure Requirements ....................................................................................................... 10
D. Fresh Air Supply Requirements ....................................................................................................... 10
E. Exhaust Requirements .....................................................................................................................11
F. Electrical Information...................................................................................................................... 16
G. Gas Information .............................................................................................................................. 18
H. Steam Information .......................................................................................................................... 22
I. Water Information .......................................................................................................................... 25
I. Preparation For Operation/Start-Up ................................................................................................ 27
J. Preoperational Tests ....................................................................................................................... 28
K. Preoperational Instructions.............................................................................................................. 30
L. Shutdown Instructions ..................................................................................................................... 30
SECTIONIV
SERVICE/PARTSINFORMATION ...................................................................................31
A. Service ........................................................................................................................................... 31
B. Parts............................................................................................................................................... 31
SECTIONV
WARRANTYINFORMATION...........................................................................................32
A. Returning Warranty Cards .............................................................................................................. 32
B. Warranty ........................................................................................................................................ 32
C. Returning Warranty Parts ............................................................................................................... 32
SECTIONVI
ROUTINEMAINTENANCE..............................................................................................34
A. Cleaning ......................................................................................................................................... 34
B. Adjustments.................................................................................................................................... 35
C. Lubrication ..................................................................................................................................... 35
D. Lint Drawer Removal ..................................................................................................................... 36
SECTIONVII
DATALABELINFORMATION .........................................................................................37
SECTIONVIII
PROCEDUREFORFUNCTIONALCHECKOF
REPLACEMENTCOMPONENTS ...................................................................................38
SECTIONIX
MANUALRESETBURNERHI-LIMITINSTRUCTIONS ................................................40
A. Phase 7 ...............................................................................................................................40
B. DualTimer ...........................................................................................................................40

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SECTIONI
SAFETYPRECAUTIONS
WARNING: Foryour safety, the information in this manual mustbefollowedtominimizetherisk of
fireor explosion or toprevent property damage, personalinjury,orloss of life.
WARNING: The dryer must never beoperated 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 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
cleaningsolvents, a combustible detergent,or “all purpose” cleaner.
EXPLOSIONCOULD RESULT.
WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,
or wax. EXPLOSIONCOULDRESULT.
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a
firehazard.
WARNING: DONOT 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.

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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: Thecollection of lintin the burner area and exhaust ductwork can create apotential 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 willVOIDTHEWARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switch, lint drawer switch, or the heat circuit
safety devices ever be disabled.
WARNING: PERSONALINJURYOR FIRE COULD RESULTSHOULD THE DRYER
DOOR SWITCH, LINT DRAWER SWITCH, OR THE HEATCIRCUIT
SAFETY DEVICES 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: Articlesleft in thedryer after the drying and cooling cycles have been completed can
createa fire hazard.
12. DO NOT operate steam dryers with more than 125 psi (8.62 bar) steam pressure. Excessive steam
pressure can damage steam coil and/or harm personnel.
13. Replace leaking flexible steam hoses or other steam fixtures immediately. DO NOT operate dryer with
leaking flexible hoses. PERSONAL INJURY MAY RESULT.
14. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO DRYER.
15. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
then sixty-six percent (66%), 50 lbs (22.68 kg) of its rated capacity.
IMPORTANT: YOU MUST DISCONNECT ANDLOCKOUTTHEELECTRICSUPPLY
AND THEGASSUPPLY OR THESTEAM SUPPLYBEFOREANY
COVERS ORGUARDS ARE REMOVED FROM THEMACHINE TO
ALLOWACCESSFORCLEANING,ADJUSTING, INSTALLATION, OR
TESTINGOFANYEQUIPMENTPEROSHA(OccupationalSafetyand Health
Administration)STANDARDS.
IMPORTANT: Dryer must be installedin a location/environment,which theambient
temperatureremains between 40° F (4.44° C) and 130° F (54.44° C).

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SECTIONII
SPECIFICATIONS/COMPONENTIDENTIFICATION
A. SPECIFICATIONS
Shaded areas are stated in metric equivalents 4/27/04
*Air-operated steam damper system must be provided with clean, dry and regulated 80 psi +/- 10 psi (5.51 bar +/- 0.69 bar) air supply.
** Water supply must be 40 psi +/- 20 psi (2.75 bar +/- 1.37 bar) for the fire suppression system to operate properly.
IMPORTANT: Steam dryersmust be provided with a clean, dry, and regulated 80 psi +/- 10 psi
(5.51 bar +/- 0.68 bar)air supply. Air volume requirement is 0.75 cfh (cubic feet per
hour) (0.02 cmh [cubic meters per hour]).
NOTE: ADCreserves the right to make changes in specifications at any time without notice or
obligation.
TUMBLER DIAMETER 37” 94 cm
TUMBLER DEPTH 36” 91.5 cm
TUMBLER VOLUME 22.4 cu ft 0.634 cu m
TUMBLER MOTOR 1/2 hp 0.373 kW
BLOWER MOTOR 3 hp 2.2 kW
DOOR OPENING (DIAMETER) 21-1/2” 54.6 cm
EXHAUST CONNECTION (DIAMETER) 14” 35.56 cm
AIRFLOW 1,700 cfm 48.14 cmm
DRYERS PER 20’/40’ CONTAINER 10 / 20
DRYERS PER 48’/53’ TRUCK 24 / 26
WATER CONNECTION** 3/4”-11.5 NH
VOLTAGE AVAILABLE 208-480v 3ø 3, 4w 50/60 Hz
APPROX. NET WEIGHT 833 lbs 377.8 kg
APPROX. SHIPPING WEIGHT 883 lbs 400.5 kg
HEAT INPUT 270,000 Btu/hr 68,040 kcal/hr
INLET PIPE CONNECTION 1” F.N.P.T.
VOLTAGE AVAILABLE 208-480v 3ø 3, 4w 50/60 Hz
APPROX. NET WEIGHT 928 lbs 420.9 kg
APPROX. SHIPPING WEIGHT 978 lbs 443.6 kg
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
COMPRESSED AIR CONNECTION 1/8” F.N.P.T.
STEAM CONSUMPTION 375 lbs/hr 170.5 kg/hr
OPERATING STEAM PRESSURE 125 psi max 8.6 bar
BOILER HP NORMAL LOAD 11
SUPPLY CONNECTION 1” F.N.P.T.
RETURN CONNECTION 1” F.N.P.T.
GasSteam*

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Specifications
NOTE: ADCreserves the right to make changes in specifications at any time without notice or
obligation.

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B. COMPONENT IDENTIFICATION
1. Dryer Front View
Illus. No. Description
1Microprocessor Control/Keyboard (touch pad) Panel Assembly (controls)
2Control (top access) Door Assembly
3Main Door Assembly
4Lint Compartment Area (located behind front panel)
5Lint Drawer
6Data Label and Installation Label

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Illus. No. Description
1Heating Unit
21/8” Compressed Air Supply Inlet
(behind electric service relay box for steam units only)
3* Electric Service Relay Box
4Basket (tumbler) Bearing Mount Assembly
5Idler Bearing Mount Assembly
6Blower Motor Assembly
7Leveling Leg (rear)
8Basket (tumbler) Drive Motor Assembly (reversing models only)
9Dryer Exhaust
* Electric service connections for gas and steam models are made in this box.
NOTE:1/8-inch compressed air supply inlet (for steam models only) is located behind the electric
servicerelay box (not illustrated).
2. Dryer Rear View

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SECTIONIII
INSTALLATION PROCEDURES
Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installationmust conformto applicable AmericanNational Standards: ANSIZ223.1-
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. 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 (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 dryermust beinstalledonnoncombustiblefloorsonly.”
2. The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.
3. Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply
Requirements in Section D).
4.Clearance provisions must be made from combustible construction as noted in this manual (refer to Dryer
Enclosure Requirements in Section C).
5. 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).
6. 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).
7.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: Dryer shouldbelocated where a minimum amount of exhaust duct will benecessary.
8. The dryer must be installed with adequate clearance for air openings into the combustion chamber.
CAUTION: This dryer produces combustible lint andmust be exhaustedtothe outdoors. Every 6
months,inspectthe exhaust ducting and removeanylint buildup.
IMPORTANT: Dryer must be installedin a location/environment,which theambient
temperatureremains between 40° F (4.44° C) and 130° F (54.44° C).

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B. UNPACKING/SETTING UP
1. Inside the basket (tumbler) of this dryer is an exhaust transition piece that must be installed on the outlet of
the exhaust before any further venting is connected. To do this,
follow the procedures listed below:
a. Remove the exhaust transition piece from the basket
(tumbler) and place it on the exhaust outlet.
b. Using the screws provided, secure the exhaust transition
piece to the dryer.
NOTE:It is recommended that this joint be taped as well as
ALLother duct joints to preventmoistureand lint
fromescapingintothebuilding.
2. Leveling Dryer
The dryer is equipped with four (4) leveling legs, one (1) at
each corner of the dryer base. Two (2) are located in the rear
of the dryer base, and two (2) are located in the lint chamber.
To increase bearing life and improve efficiency, the dryershould
be tilted slightly to the rear.
WARNING
An exhaust duct transition piece is shipped inside of the dryer’s
tumbler and MUST be installed on the dryer’s
exhaust duct, with the hardware provided, BEFORE
location venting is connected to the dryer.
THIS EXHAUST DUCT TRANSITION PIECE
MUST BE INSTALLED FIRST!
Failure to observe this installation requirement may result in
damage to the dryer, create a FIRE HAZARD and will VOID
the manufacturer’s warranty.
012999JEV-GS/cj P/N: 114092

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C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible material.
NOTE: Allowancesmust be made for opening the control door.
A30-inches (76.2 cm) for optimum opening of load door.
BThe maximum thickness of the bulkhead is 4-inches (10.16 cm). For electric dryers the maximum thickness
of the bulkhead is 1-inch (2.54 cm) within 3-inches (7.62 cm) from the top of the control door.
CFor gas and electric dryers a minimum overhead clearance of 12-inches (30.48 cm) is required, providing no
sprinkler is located above the dryer. For steam dryers or if a sprinkler is located above the dryer, 18-inches
(45.72 cm) is required
DDryer should be positioned 12-inches (30.48 cm) away from the nearest obstruction and 24-inches
(60.96 cm) is recommended for ease of installation, maintenance, and service.
E2-inch (5.08 cm) minimum is required for opening the control door.
FFlooring should be level or below dryer cabinet for ease of removing panels during maintenance.
GDryers 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, along with the removal of panels during maintenance.
D. FRESH AIR SUPPLYREQUIREMENTS
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 airmust 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 ensure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 1,700 cfm (cubic feet per minute) (48.14
cmm [cubic meters per minute]) must be supplied to each dryer. As a general rule, an unrestricted air entrance
from the outdoors (atmosphere) of a minimum of 2-1/2 square feet (0.23 square meters) is required for each
dryer. The dryer must be installed with provisions for adequate combustion and make-up air supply.

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To compensate for the use of registers or louvers used over the openings, the 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 ALL
the dryers. The dryer must be installed with provisions for adequate combustion and make-up air supply.
EXAMPLE: For a bank of four (4) dryers, two (2) openings measuring 2 feet by 2-1/2 feet (0.61 meters
by 0.76 meters) are acceptable.
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 airmust be provided from a source free of dry cleaning solvent fumes.
Make-upair that is contaminatedby dry cleaning solventfumes will result in
irreparable damage to the motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes willVOIDTHEWARRANTY.
E. EXHAUST REQUIREMENTS
1. General Exhaust Ductwork Information
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, overheating of
the dryer, and shutdown of the burner by the airflow (sail) switches, burner hi-limits, or basket (tumbler)
hi-heat thermostats. The dryer must be installed with a proper exhaust duct connection to the outside.
CAUTION: This dryer produces combustible lint andmust beexhausted to the outdoors.
CAUTION: IMPROPERLY SIZEDOR INSTALLED EXHAUSTDUCTWORK CAN
CREATEAPOTENTIALFIREHAZARD.

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The 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. Single or independent dryer venting is recommended.
When single dryer venting is used, the length of the ductwork from the dryer to the outside exhaust outlet
must not exceed 15 feet (4.57 meters). The minimum diameter of this ductwork must be at least
14-inches (35.56 cm). In the case of multiple (common) dryer venting, the distance from the last dryer to
the outside exhaust outlet must not exceed 15 feet (4.57 meters). The shape of the ductwork is not
critical as long as the minimum cross section area is provided. It is suggested that the use of 90° turns be
avoided; use 30° and/or 45° angles instead. The radius of the elbows should preferably be 1-1/2 times
the diameter of the duct. Including basket (tumbler) dryer elbow connections or elbows used for outside
protection from the weather, no more than three (3) elbows should be used in the exhaust duct run. If
more than three (3) elbows are used, the cross section area of the ductwork must be increased in proportion
to the number of elbows added.
IMPORTANT:It is recommendedthat exhaust or booster fans not be used in the exhaust ductwork
system.
ALL ductwork should be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be
connected. ALL ductwork joints must be taped to prevent moisture and lint from escaping into the
building. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic
inspection and cleaning of lint from the ductwork.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct areamust be no less than 0 andmust not exceed0.3 inches (0.74 mb) of water
column(W.C.).
IMPORTANT: Minimumductworkdiameteris 14-inches (35.56 cm).
NOTE: Whenthe exhaust ductwork passesthrough a wall, ceiling,or roof made ofcombustible
materials, the openingmustbe2-inches (5.08 cm) larger than theduct (all the way around).
Theduct mustbecenteredwithinthisopening.
Outside Ductwork Protection
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 opening and the nearest obstruction.
IMPORTANT: DO NOT use screens, louvers, or caps on the outside opening of the exhaust
ductwork.

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2. Single Dryer Venting
When possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust duct 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. It is suggested that the use of 90° turns in the ducting be avoided; use 30° and/or 45° angles
instead. The shape of the exhaust ductwork is not critical as long as the minimum cross section area is
provided.
IMPORTANT: Minimum duct size for a dryer is 14-inches (35.56 cm) for a round duct or
12-1/2” x 12-1/2” (31.75 cm x 31.75 cm) for a square duct. THE DUCTSIZE
MUST NOT BEREDUCEDANYWHEREDOWNSTREAMOFTHE
DRYER.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct areamust be no less than 0 andmust not exceed0.3 inches (0.74 mb) of water
column(W.C.).
It is suggested that the ductwork from each dryer not exceed 15 feet (4.57 meters) with no more than three
(3) elbows. If the ductwork exceeds 15 feet (4.57 meters) or has numerous elbows, the cross section area
of the ductwork must be increased in proportion to the length and number of elbows in it. In calculating
duct size, the cross section area of a square or rectangular duct must be increased by twenty percent
(20%) for each additional 15 feet (4.57 meters). The diameter of a round exhaust duct should be increased
ten percent (10%) for each additional 15 feet (4.57 meters). Each 90º elbow is equivalent to an additional
30 feet (9.14 meters), and each 45º elbow is equivalent to an additional 15 feet (4.57 meters).
IMPORTANT:It is recommendedthat exhaust or booster fans not be used in the exhaust ductwork
system.
IMPORTANT: For extended ductwork runs, the cross section area of the ductwork can only be
increased to an extent. When the ductwork approaches the maximum limits as noted
inthismanual,aprofessionalheating,ventilating, and air-conditioning (HVAC) firm
should be consultedfor proper ventinginformation.

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ALL ductwork should be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be
connected. ALL ductwork joints must be taped to prevent moisture and lint from escaping into the
building. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic
inspection and cleaning of lint from the ductwork.
NOTE: Whenthe exhaust ductwork passesthrough a wall, ceiling,or roof made ofcombustible
materials, the openingmustbe2-inches (5.08 cm) largerthan the duct (allthe way around).
Theduct mustbecenteredwithinthisopening.
Outside Ductwork Protection
To protect the outside end of the horizontal ductwork from the weather, a 90° elbow bent downward
should be installed where the exhaust exits the building. If the exhaust ductwork travels vertically up
through the roof, itshould 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.
IMPORTANT: DO NOT use screens, louvers, or caps on the outside opening of the exhaust
ductwork.
3. Multiple Dryer (common) Venting
If it is not feasible to provide separate exhaust ducts for each dryer, ducts from individual dryers may be
channeled into a “common main duct.” The individual ducts should enter the bottom or side of the main
duct at an angle not more than 45º in the direction of airflow and should be spaced at least 38-1/4” (97.15
cm) apart. The main duct should be tapered, with the diameter increasing before each individual duct
is added.
IMPORTANT: No more than four (4) dryers should be connected to one (1) main common duct.
The main duct may be any shape as long as the minimum cross-sectional area is provided. The illustration
on page 15 shows the minimum cross section area for multiple dryer round or square venting. These
figures must be increased 10 square inches (64.52 square centimeters) when rectangular main ducting is
used, and the ratio of duct width to depth should not be greater than 3-1/2 to 1. These figures must be
increased in proportion if the main duct run to the last dryer to where it exhausts to the outdoors is unusually
long (over 15 feet [4.57 meters]) or has numerous (more than three [3]) elbows in it. In calculating
ductwork size, the cross section area of a square or rectangular duct must be increased twenty percent
(20%) for each additional 15 feet (4.57 meters). The diameter of a round exhaust must be increased ten
percent (10%) for each additional 15 feet (4.57 meters). Each 90º elbow is equivalent to an additional 30
feet (9.14 meters) and each 45º elbow is equivalent to an additional 15 feet (4.57 meters).
IMPORTANT: For extended ductwork runs, the cross section area of the ductwork can only be
increased to an extent. Maximum proportional ductwork runs,cannotexceed 15 feet
(4.57 meters) more than the original limitations of 15 feet (4.57 meters) with three (3)
elbows. Whenthe ductwork approachesthe maximum limits as noted in this manual,
aprofessional heating, ventilating, andair-conditioning (HVAC) firm shouldbe
consultedforproperventinginformation.
IMPORTANT: Exhaustback pressure measuredby a manometerat each dryer exhaust duct area
must be no less than 0 andmust not exceed 0.3 inches (0.74 mb) of water column
(W.C.).

113159-2
www.amdry.com
15
The ductwork should be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be
connected. ALL ductwork joints must be taped to prevent moisture and lint from escaping into the
building. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic
inspection and cleaning of lint from the ductwork.
NOTE: Whenthe exhaust ductwork passesthrough a wall, ceiling,or roof made ofcombustible
materials, the openingmustbe2-inches (5.08 cm) larger than theduct (all the way around).
Theduct mustbecenteredwithinthisopening.
Outside Ductwork Protection
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 exhaust 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 nearest obstruction.
IMPORTANT: DO NOT use screens, louvers, or caps on the outside opening of the exhaust
ductwork.
IMPORTANT:It is recommendedthat exhaust or booster fans not be used in the exhaust ductwork
system.

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American Dryer Corp.
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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: Failureto comply with these codes orordinances, and/or the requirements stipulated
inthismanualcanresult in personal injury or component failure.
NOTE: Component failure due to improper installation willVOIDTHEWARRANTY.
Each dryer should be connected to an independently protected branch circuit. The dryermust be connected
with copper wire only. DO NOT use aluminum wire, it can 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 willVOIDTHEWARRANTY.
IMPORTANT: A separate protected circuitmustbe provided to each dryer.
NOTE: Anindividual ground circuit mustbe provided to eachdryer, do not daisychain.
IMPORTANT: The dryermust be connected to the electric supply shown on the data label. In the
caseof 208 VAC or 240 VAC, the supply voltage must match the electric service
specifications of the data labelexactly.
IMPORTANT: The wire size mustbeproperly sized to handle the related current.
WARNING: 208VAC AND240VACARE NOTTHE SAME. Any damage done to dryer
componentsdue to improper voltageconnections will automaticallyVOIDTHE
WARRANTY.
NOTE: Component failure due to improper voltage application willVOIDTHEWARRANTY.
NOTE: Themanufacturerreserves the right to make changes inspecificationsatany time without
noticeorobligation.