American Dryer Corp. ML-82 III User manual

ML-82 III Installation Manual
Gas – DSI / Steam Models / Phase 7
Fire Suppression System
ADC Part No. 113344-9
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.

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 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 manual included with
the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
“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.
FOR YOUR SAFETY
Do not store or use gasoline
or other flammable vapors
and 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. 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
[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.
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.
ML-82

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 UNATTENDEDWHILE IN OPERATION.
FOR YOUR SAFETY
DO NOT DRYMOPHEADS INTHE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRYCLEANING FUMES.
IMPORTANT
YOU MUST DISCONNECTAND LOCKOUT THE ELECTRIC SUPPLYAND 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 HealthAdministration) STANDARDS.
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
UNDER NO CIRCUMSTANCES should the dryer door switch, lint drawer switch, or
heat safety circuit ever be disabled.
“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
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 ALL SAFETY 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 IFAN EXTERNALLINT 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 .............................................................................................................................. 2
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION ......................................................................... 4
A. Specifications .......................................................................................................................................... 4
B. Component Identification ........................................................................................................................ 6
SECTION III
INSTALLATION PROCEDURES ................................................................................................................ 8
A. Location Requirements ........................................................................................................................... 8
B. Unpacking/Setting Up ............................................................................................................................. 9
C. Dryer Enclosure Requirements ............................................................................................................ 10
D. Fresh Air Supply Requirements ............................................................................................................ 11
E. Exhaust Requirements .......................................................................................................................... 12
F. Electrical Information ........................................................................................................................... 16
G. Gas Information .................................................................................................................................... 18
H. Steam Information ................................................................................................................................ 22
I. Fire Suppression System ...................................................................................................................... 25
J. Preparation for Operation/Start-Up...................................................................................................... 28
K. Preoperational Test ............................................................................................................................... 29
L. Preoperational Instructions ................................................................................................................... 31
M. Shutdown Instructions .......................................................................................................................... 31
SECTION IV
SERVICE/PARTS INFORMATION ........................................................................................................... 3 2
A. Service .................................................................................................................................................. 32
B. Parts...................................................................................................................................................... 32
SECTION V
WARRANTY INFORMATION ................................................................................................................... 3 3
A. Returning Warranty Cards ................................................................................................................... 33
B. Warranty ............................................................................................................................................... 33
C. Returning Warranty Parts ..................................................................................................................... 33
SECTION VI
ROUTINE MAINTENANCE ...................................................................................................................... 3 5
A. Cleaning ................................................................................................................................................ 35
B. Adjustments .......................................................................................................................................... 36
C. Lubrication ............................................................................................................................................ 36
D. Lint Drawer Removal ........................................................................................................................... 37
SECTION VII
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS ................... 3 8
SECTION VIII
DATA LABEL INFORMATION ................................................................................................................. 4 0
SECTION IX
MANUAL RESET BURNER HI-LIMIT INSTRUCTIONS .................................................................. 4 1
A. Phase 7 ................................................................................................................................................. 41
B. Dual Timer ............................................................................................................................................ 41

2 American Dryer Corp. 113344-9
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/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
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.
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 may be a fire hazard.

113344- 9 www.amdry.com 3
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 DRAWER 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 FOLLOW ALL 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%), 53 lb (24.04 kg) of its rated capacity.
WARNING: YOU MUST DISCONNECTAND 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.
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).

4 American Dryer Corp. 113344-9
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. SPECIFICATIONS
TUMBLER DIAMETER 37” 94 cm
TUMBLER DEPTH 36” 91.5 cm
TUMBLER VOLUME 22.4 cu ft 634.29 L
TUMBLER/DRIVE MOTOR 1/2 hp 0.373 kW
BLOWER/FAN MOTOR 3 hp 2.2 kW
DOOR OPENING (DIAMETER) 3 1 -3 / 8” 79.7 cm
DOOR SILL HEIGHT 2 5 ” 63.5 cm
WATER CONNECTION 3/4”-11.5 NH
(North America)
3/4” B.S.P.T. (Outsi de North America)
DRYERS PER 20’/40’ CONTAINER 10 / 2 0
DRYERS PER 48’/53’ TRUCK 24 / 26
VOLTAGE AVAILABLE 208-460V 3ø 3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 833 lb 377.8 kg
APPROXIMATE SHIPPING WEIGHT 883 lb 400.5 kg
AIRFLOW 60 Hz 1,700 cfm 48.14 cmm
50 Hz 1,417 cfm 40.12 cmm
HEAT INPUT 270,000 Btu/hr 68,040 kcal/hr
EXHAUST CONNECTION (DIAMETER) 14” 35.56 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
INLET PIPE CONNECTION 1” F.N.P.T.
1” 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 208-460V 3ø 3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 928 lb 420.9 kg
APPROXIMATE SHIPPING WEIGHT 978 lb 443.6 kg
AIRFLOW 60 Hz 1,700 cfm 48.14 cmm
50 Hz 1,417 cfm 40.12 cmm
STEAM CONSUMPTION 375 lb/hr 170.5 kg/hr
OPERATING STEAM PRESSURE 125 psi max 8.6 bar
EXHAUST CONNECTION (DIAMETER) 14” 35.56 cm
COMPRESS ED AIR CONNECTION 1 /8 ” F. N.P.T.
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
BOILER HORSEPOWER (NORMAL LOAD) 11 Bhp
SUPPLY CONNECTION 1” F.N.P.T.
RETURN CONNECTION 1 ” F.N.P.T.
Shaded areas are stated in metric equivalents 4/7/04
* Steam dryers must be provided with a clean, dry, and regulated 80 psi +/- 10 psi (5.51 bar +/- 0.68 bar) air supply.
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
GasElectricSteam*

113344- 9 www.amdry.com 5
Specifications
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.

6 American Dryer Corp. 113344-9
B. COMPONENT IDENTIFICATION
1. Dryer Front View
Illus. No. Description
1 Controls
2 Control (top access) Door Assembly
3 Main Door Assembly
4 Lint Compartment Area (lint screen located behind door)
5 Lint Drawer
6 Data Label and Installation Label

113344- 9 www.amdry.com 7
2. 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 Basket (tumbler) Bearing Mount Assembly
5 Idler Bearing Mount Assembly
6 Blower Motor Assembly
7 Leveling Leg (rear)
8 Basket (tumbler) (drive) Motor Assembly (reversing models only)
9 Dryer Exhaust
* Electric service connections for gas models and steam models are made in this box.

8 American Dryer Corp. 113344-9
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: 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. 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 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. 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 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 buildup.

113344- 9 www.amdry.com 9
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).
B. 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.
The dryer can be moved to its final location with or without the skid attached. To unskid the dryer, locate and
remove the four (4) bolts securing the base of the dryer to the wooden skid. Two (2) are located 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 lint drawer completely. (Refer to page 37 for lint drawer
removal instructions.) Once the bolts are removed and the lint drawer is reinserted, slide the dryer off of the
skid.
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.
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 ALL other duct joints to prevent
moisture and lint from escaping into the building.
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
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 at the rear of the
dryer base, and two (2) are located in the lint chamber. To increase
bearing life and improve efficiency, the dryer should be tilted
slightly to the rear.

10 American Dryer Corp. 113344-9
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible material.
NOTE: Allowances must be made for opening the control door.
A 40-inches (101.6 cm) for optimum opening of load door.
B The 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.
C For 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
D Dryer 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.
E 2-inch (5.08 cm) minimum is required for opening the control door.
F Flooring should be level or below dryer cabinet for ease of removing panels during maintenance.
G 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, along with the removal of panels during maintenance.

113344- 9 www.amdry.com 11
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 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 airflow of 1,700 cfm (48.14 cmm) 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.
To compensate for the use of registers or louvers used over the openings, the area 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 separate make-up air openings 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.
EXAMPLE: For a bank of four (4) dryers, two (2) unrestricted openings measuring 2-1/2 feet by 2 feet
(0.76 meters by 0.61 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 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.

12 American Dryer Corp. 113344-9
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 shut down 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 and must be exhausted to the outdoors.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN
CREATE APOTENTIAL FIRE HAZARD.
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 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-sectional 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) and dryer elbow connections or elbows used for outside protection
from the weather, no more than two (2) elbows should be used in the exhaust duct run. If more than two
(2) elbows are used, the cross-sectional area of the ductwork must be increased.
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 in the exhaust duct must be no less
than 0 and must not exceed 0.3 inches (0.74 mb) of water column (W.C.).
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.
IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust ductwork
system.
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 [0.5 mm]) thick.”

113344- 9 www.amdry.com 13
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: For a dryer that is vented horizontally, the minimum duct size for a gas dryer is
14-inches (35.56 cm) for a round duct or 12-1/2” (31.75 cm) for a square duct.
THE DUCT SIZE MUST NOT BE REDUCED ANYWHERE
DOWNSTREAM OF THE DRYER.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct area must be no less than 0 and must not exceed 0.3 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 two
(2) elbows (excluding dryer connections and outside exhaust outlets). 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).
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.

14 American Dryer Corp. 113344-9
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 noted in
this manual, a professional heating, ventilating, and air-conditioning (HVAC) firm
should be consulted for proper venting information.
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: 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.
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 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.
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 (14-inch [35.56 cm] minimum for gas models and 16-inch [40.64 cm] minimum for steam models) is
added.

113344- 9 www.amdry.com 15
IMPORTANT: No more than four (4) dryers should be connected to one (1) main common duct.
The main duct may be any shape so long as the minimum cross-sectional area is provided. The illustration
on page 16 shows the minimum cross section area for multiple dryer round or square venting. These
figures must be increased 10 square inches (64.52 squares 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 two [2]) 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, cannot exceed 15 feet
(4.57 meters) more than the original limitations of 15 feet (4.57 meters) with two (2)
elbows. When the ductwork approaches the maximum limits as noted in this manual,
a professional heating, ventilating, and air-conditioning (HVAC) firm should be
consulted for proper venting information.
IMPORTANT: Exhaust back pressure measured by a manometer at each 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.).
The ductwork should be smooth inside with 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: 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.
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.

16 American Dryer Corp. 113344-9
F. ELECTRICAL INFORMATION
1. Electrical Requirements
It is your responsibility to have ALL electrical connections made by a properly licensed and competent
electrician to assure 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 circuit servicing each dryer must be provided.