American Dryer Corp. ML-25V User manual

AD-25V / ML-25V
Installation Manual
Phase 7 / Dual Timer / S.A.F.E. System
ADC Part No. 113237-19
American Dryer Corporation
88 Currant Road, Fall River MA 02720-4781 USA
Telephone: [phone] / Fax: [phone]
e-mail: [email protected] / www.adclaundry.com
AVERTISSEMENT:
RISQUE D’INCENDIE OU D’EXPLOSION
Le non-respect des avertissements de
sécurité pourrait entraîner des blessures
graves, la mort ou des dommages
matériels.
– N’entreposer pas et n’utilisez pas
d’essence ni d’autres vapeurs ou
liquides inflammables dans le voisinage
de cet appareil ou de tout autre appareil.
– QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ
●●
●●
●Ne tentez pas d’allumer d’appareil.
●●
●●
●Ne touchez à aucun interrupteur. Ne
vous servez pas des téléphones se
trouvant dans le bâtiment où vous
vous trouvez.
●●
●●
●Évacuez la pièce, le bâtiment ou la zone.
●●
●●
●Appelez immédiatement votre
fournisseur de gaz depuis un voisin.
Suivez les instructions du fournisseur.
●●
●●
●Si vous ne pouvez rejoindre le
fournisseur de gaz, appelez le service
des incendies.
– L’installation et l’entretien doivent être
assurés par un installateur ou un service
d’entretien qualifié ou par le fournisseur
de gaz.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death or
property damage.
– 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 appliances.
●●
●●
●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.
!!
!!
!!!
!!
!

2 American Dryer Corp. 113237- 19
“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. The manufacturer 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.
These instructions are only valid if the following country code is on the appliance… If this code is not present on the
appliance, it is necessary to refer to the technical instructions, which will provide the necessary information concerning
the modification of the appliance to the condition of use for the country.
In accordance with EN ISO 3166-1, the names of countries shall be represented by the following codes:
GB United Kingdom
IE Ireland
Retain This Manual in a Safe Place for Future Reference
This product embodies 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.
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.

113237-19 www.adclaundry.com 3
Table of Contents _________________
IMPORTANT
You must disconnect and lockout the electric supply and
the gas supply or the steam supply before any covers or
guards are removed from the machine to allow access
for cleaning, adjusting, installation, or testing of any
equipment per OSHA standards.
Please observe all safety precautions displayed on the
equipment and/or specified in the installation manual
included with the dryer.
Before installation, check that the local distribution
conditions, nature of gas and pressure, and adjustment
of the appliances are compatible.
CAUTION
Dryer(s) should never be left unattended while in
operation.
When discarding or storing your old clothes dryer,
remove the door.
Lorsque vous entreposez ou mettez votre
sécheuse au rebut, enlevez-en la porte.
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.
WARNING
Children should not be allowed to play on or near the
dryer(s). Children should be supervised if near dryer(s)
in operation.
Under no circumstances should the dryer door
switch(es), lint door/drawer switch(es), or heat safety
circuit(s) ever be disabled.
DO NOT MODIFY THIS APPLIANCE.
The dryer must never be operated with any of the back
guards, outer tops, or service panels removed. Personal
injury or fire could result.
The dryer must never be operated without the lint filter/
screen in place, even if an external lint collection system
is used.
If the hi-limit switch trips, a service call is required to
investigate the reason and resolve the issue.
FOR YOUR SAFETY
Do not dry mop heads in the dryer. Do not use dryer
in the presence of dry cleaning fumes.
The dryers must not be installed or stored in an area
where it will be exposed to water and/or weather.
The wiring diagram for the dryer is located in the front
electrical control box area.
List of Acronyms ________________________
D.M.S. Drill Measurement Size
DSI Direct Spark Ignition
HVAC Heating, Ventilating, and Air-Conditioning
in WC Inches of Water Column
L.C.D. Liquid Crystal Display
L.E.D. Light Emitting Diode
OSHA Occupational Safety and Health Administration
R.M.A. Return Material Authorization
S.A.F.E. Sensor Activated Fire Extinguishing
UL Underwriters Laboratory
In the State of Massachusetts, the following
installation instructions apply:
■Installations and repairs must be performed by
a qualified or licensed contractor, plumber, or
gas fitter qualified or licensed by the State of
Massachusetts.
■Acceptable Shut-off Devices: Gas Cocks and Ball
Valves installed for use shall be listed.
■A flexible gas connector, when used, must not
exceed 4 feet (121.9 cm).
Safety Precautions ....................................... 4
Specifications .............................................. 6
Installation Procedures ................................ 8
Unpacking / Setting Up............................................ 8
Location Requirements .......................................... 8
Dryer Enclosure Requirements .............................. 8
Fresh Air Supply Requirements .............................. 9
Exhaust Requirements ........................................... 9
Electrical Information............................................. 12
Gas Information ..................................................... 15
Steam Information ................................................. 17
Preparation for Operation / Start-Up ..................... 19
Preoperational Test ............................................... 20
Preoperational Instructions ................................... 20
Shutdown Instructions .......................................... 21
Service / Parts Information ....................... 22
Service ................................................................... 22
Parts ....................................................................... 22
Warranty Information ................................. 22
Returning Warranty Cards .................................... 22
Warranty ................................................................. 22
Returning Warranty Parts ...................................... 22
Routine Maintenance ................................. 23
Data Label Information .............................. 24
Procedure for Functional Check
of Replacement Components .................... 25
Manual Reset Burner Hi-Limit Instructions 26
S.A.F.E. System ........................................... 27
Non-Coin Programming .............................. 30
Coin Programming ...................................... 31

4 American Dryer Corp. 113237 -19
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.
The dryer must never be operated with any of the back
guards, outer tops, or service panels removed.
Personal injury or fire could result.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Do not spray aerosols in the vicinity of this appliance while it
is in operation.
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.
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 gas supplier.
Dryer(s) must be exhausted to the outdoors.
Although the manufacturer 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, industrial chemicals, or “all
purpose” cleaner. Explosion could result.
Do not dry rags or articles coated or contaminated
with gasoline, kerosene, oil, paint, or wax. Explosion
could result.
Do not dry mop heads. Contamination by wax or
flammable solvents will create a fire hazard.
Do not use heat for drying articles that contain plastic,
foam, sponge rubber, or similarly textured rubber
materials. Drying in a heated tumbler may damage
plastics or rubber and may be a fire hazard.
The possible presence of residual quantities of aggressive
or decomposed chemicals in the load may produce damage
to the machine and harmful fumes.
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.
For personal safety, the dryer, when installed must be
electrically grounded in accordance with local codes or, in
the absence of local codes, with the National Electrical Code,
ANSI/NFPA 70, or the Canadian Electrical Code, CSA C22.1.
NOTE: Failure to electrically ground the dryer properly will
void the warranty.
Under no circumstances should the dryer door switch, lint
drawer switch, or the heat safety circuit devices ever be
disabled.
!WARNING
Personal injury or fire could result should the dryer
door switch, lint drawer switch, or the heat safety circuit
ever be disabled.
This dryer is not to be used in the presence of dry cleaning
solvents or fumes.
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.
Read and follow all caution and direction labels attached to
the dryer.
For safety, proper operation, and optimum performance, the
dryer must not be operated with a load less than sixty-six
percent, 16 lb (7 kg) of its rated capacity.
!WARNING
You must disconnect and lockout the electric supply
and the gas supply or the steam supply before any
covers or guards are removed from the machine to
allow access for cleaning, adjusting, installation, or
testing of any equipment per OSHA 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).

113237-19 www.adclaundry.com 5
NOTES __________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________
CE ONLY
IMPORTANT: This appliance must only be installed and operated in the country of destination indicated on the dryer’s data
plate. If the appliance is to be installed and operated in a country other than the one indicated on the data plate, a data
plate amendment must be obtained from American Dryer Corporation.
IEC335 applies.

6 American Dryer Corp. 113237- 19
MAXIMUM CAPACITY (DRY WEIGHT) 25 lb 11.3 kg
TUMBLER DIAMETER 32-3/4” 83.2 cm
TUMBLER DEPTH 19” 48.3 cm
TUMBLER VOLUME 9.26 cu ft 262.21 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 31” 78.74 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 / 30
DRYERS PER 48’/53’ TRUCK 45 / 51
VOLTAGE AVAILABLE 120-480V 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 407 lb 184.6 kg
APPROXIMATE SHIPPING WEIGHT 446 lb 202.1 kg
AIRFLOW 60 Hz 460 cfm 13 cmm
50 Hz 383 cfm 10.85 cmm
HEAT INPUT 78,000 Btu/hr 19,656 kcal/hr
EXHAUST CONNECTION (DIAMETER) 8” 20.32 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
INLET PIPE CONNECTION 1/2” M.N.P.T.**
1/2” B.S.P.T.
(CE and Australia Only)
VOLTAGE AVAILABLE 208-480V 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 407 lb 184.6 kg
APPROXIMATE SHIPPING WEIGHT 446 lb 202.1 kg
AIRFLOW 60 Hz 460 cfm 13 cmm
50 Hz 383 cfm 10.85 cmm
EXHAUST CONNECTION (DIAMETER) 8” 20.32 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
OVEN SIZE
kW Btu/hr kcal/hr
15 51,200 12,900
18 61,400 15,400
20 68,200 17,200
24 81,900 20,600
30 102,300 25,700
VOLTAGE AVAILABLE 120-480V 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 435 lb 197.3 kg
APPROXIMATE SHIPPING WEIGHT 474 lb 214.8 kg
AIRFLOW 60 Hz 460 cfm 13 cmm
50 Hz 383 cfm 10.85 cmm
STEAM CONSUMPTION 98.8 lb/hr 44.8 kg/hr
OPERATING STEAM PRESSURE 125 psi max 8.6 bar
EXHAUST CONNECTION (DIAMETER) 8” 20.32 cm
COMPRESSED AIR CONNECTION 1/8” F.N.P.T.
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
BOILER HORSEPOWER (NORMAL LOAD) 2.9 Bhp
SUPPLY CONNECTION 1” F.N.P.T.
RETURN CONNECTION 1” F.N.P.T.
Shaded areas are stated in metric equivalents 3/21/17
* Reversing dryer available with 3-phase (3ø) 1/2 hp (0.373 kW) motors standard.
** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
*** Specify air-operated or electromechanical steam damper system. Air-operated steam damper system must
be provided with clean, dry, and regulated 80 psi ± 10 psi (5.51 bar ± 0.68 bar) air supply.
GASELECTRICSTEAM***
Specifications _____________________________________________________________________
NOTE: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

113237-19 www.adclaundry.com 7
Specifications _____________________________________________________________________
NOTE: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

8 American Dryer Corp. 113237 -19
Clearance provisions must be made from combustible
construction as noted in this manual (refer to Dryer Enclosure
Requirements).
Provisions must be made for adequate clearances for
servicing and for operation as noted in this manual (refer to
Dryer Enclosure Requirements).
Dryer must be exhausted to the outdoors as noted in this
manual (refer to Exhaust Requirements).
Dryer must be located in an area where correct exhaust
venting can be achieved as noted in this manual (refer to
Exhaust Requirements).
IMPORTANT: Dryer should be located where a minimum
amount of exhaust duct will be necessary.
The dryer must be installed with a proper exhaust duct
connection to the outside.
The dryer must be installed with provisions for adequate
combustion and make-up air supply.
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.
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).
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; 18-inches (45.72 cm)
for steam dryers, except along the front of the dryer, which
may be closed if desired.
NOTE: Allowances must be made for opening the control
door.
Installation Procedures _______________
Installation should be performed by competent professional
in accordance with local, state, and country codes. In the
absence of these codes, the installation must conform to
applicable American National Standards: National Fuel Gas
Code ANSI Z223.1/NFPA 54 and National Electric Code ANSI/
NFPA 70, or in Canada, the installation must conform to
applicable Canadian Standards: Natural Gas and Propane
Installation Code CSA B149.1 and Canadian Electric Code
CSA C22.1.
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 while still attached
to the skid or with the skid removed. To unskid the dryer,
locate and remove the four bolts securing the base of the
dryer to the wooden skid. Two are at the rear base (remove
the back panel for access), and two are located in the bottom
of the lint chamber. To remove the two 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 leveling legs, so
that the dryer will slide on the legs instead of the base frame.
Leveling Dryer
The dryer is equipped with four leveling legs, one at each
corner of the base. Two are located at the rear of the dryer
base, and two are located in the lint chamber (coop). To
increase bearing life and improve efficiency, the dryer should
be tilted slightly to the rear.
Location Requirements _______________
Before installing the dryer, ensure the location conforms to
local codes and ordinances. In the absence of such codes
or ordinances the location must conform with National Fuel
Gas Code ANSI Z223.1/NFPA 54, or in Canada, the
installation must conform to applicable Canadian Standards:
Natural Gas and Propane Installation Code CSA B149.1.
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.”
The dryer must not be installed or stored in an area where it
will be exposed to water and/or weather.
The dryer is for use in noncombustible locations.
Provisions for adequate air supply must be provided as noted
in this manual (refer to Fresh Air Supply Requirements).
X = 12-inch (30.48 cm) minimum, 24-inches (60.96 cm) is suggested for ease
of maintenance.
* 1-inch (2.54 cm) maximum for electric dryers.
**18-inch (45.72 cm) minimum for steam dryers.
NOTE: Air considerations are important for proper and
efficient operation.

113237-19 www.adclaundry.com 9
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. 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 on the previous page for
details.
Fresh Air Supply Requirements _______
This appliance may only be installed in a room that meets
the appropriate ventilation requirements specified in the
national installation regulations.
The 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 460 cfm (cubic feet per minute) (13 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 1 square foot (0.093 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 dryers, two unrestricted
openings measuring 2 feet by 2 feet (0.61 meters by 0.61
meters) (4 square feet [0.372 square meters]) are
acceptable.
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.
When possible, it is suggested to provide a separate (single)
exhaust duct for each dryer.
The design of the flue system shall be such that any
condensate formed when operating the appliance from cold
shall either be retained and subsequently re-evaporated or
discharged.
CAUTION: This dryer produces combustible lint and
must be exhausted to the outdoors.
Improperly sized or installed exhaust ductwork can
create a potential fire hazard.
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 90° turns be avoided; use 30°
or 45° 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 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 180° 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.
Exhaust back pressure measured by a manometer/
magnehelic in the exhaust duct must be no less than 0 and
must not exceed 0.3 in WC (0.74 mb).
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.

10 American Dryer Corp. 113237 -19
NOTE: It is recommended that exhaust or booster fans not
be used in the exhaust ductwork system except where
necessary to maintain exhaust back pressure (in the
exhaust duct) between zero and 0.3 in WC (0.74 mb).
Where employed, booster fans must not activate the dryer
airflow proving switch (sail switch) when the dryer is not in
operation.
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 85 feet (25.9
meters) a minimum size of 10-inches (25.4 cm) must be
used.
Horizontal Venting
When a single 8-inch (20.32 cm) horizontal vent is used, the
ductwork to the outlet cannot exceed 85 feet (25.9 meters),
refer to Illus. A below. This calculation of 85 feet (25.9 meters)
compensates or allows for the use of a maximum of only
one elbow (which is the outside outlet protection).
Illus. A
Vertical Venting
When vertical single 8-inch (20.32 cm) venting is used, the
ductwork from the dryer to the outside outlet cannot exceed
55 feet (16.7 meters) (refer to Illus. B below). This calculation
compensates for the use of a maximum of three elbows
including the two elbows creating the 180° (turned downward)
outside outlet.
Illus. B
If the length of the ductwork run or quantity of elbows used
exceeds the above noted specifications, the cross-sectional
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-
sectional area of the ductwork can only be increased to an
extent. For extended ductwork runs, a professional HVAC
firm must be consulted for proper venting information.
Multiple Dryer (Common) 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 45° in the
direction of the airflow.
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 for
Horizontal Venting and Illus. D for Vertical Venting on the
following page).
IMPORTANT: No more than four dryers maximum should
be connected to one 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 34-1/4” (87 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.
The illustrations on the following page show the minimum
cross section area for 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 HVAC firm
must be consulted for proper venting information.
Refer to the following page for Multiple Dryer Horizontal
Venting and Vertical Venting examples/illustrations.
IMPORTANT: Exhaust back pressure measured by a
manometer/magnehelic in the exhaust duct must be no
less than 0 and must not exceed 0.3 in WC (0.74 mb).
NOTE: It is recommended that exhaust or booster fans not
be used in the exhaust ductwork system except where
necessary to maintain exhaust back pressure (in the
exhaust duct) between zero and 0.3 in WC (0.74 mb).
Where employed, booster fans must not activate the dryer
airflow proving switch (sail switch) when the dryer is not in
operation.
!WARNING
Dryer must never be operated without the lint filter/
screen in place, even if an external lint collection
system is used.

113237-19 www.adclaundry.com 11
Horizontal Venting
Illus. C
Vertical Venting
Illus. D

12 American Dryer Corp. 113237 -19
Electrical Information _________________
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,
state, and national regulations or codes of the country of
destination. In the absence of such codes, all electrical
connections, materials, and workmanship must conform to
the applicable requirements of National Electric Code ANSI/
NFPA 70, or in Canada, Canadian Electric Code CSA C22.1.
For personal safety, the dryer, when installed must be
electrically grounded in accordance with local codes or, in
the absence of local codes, with the National Electrical Code,
ANSI/NFPA 70, or the Canadian Electrical Code, CSA C22.1.
NOTE: Component failure due to improper installation will
void the warranty.
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.
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.
IMPORTANT: The dryer must be connected to the electric
supply shown on the data label. In the case of 208 VAC or
230/240 VAC, the supply voltage must match the electric
service specifications of the data label exactly.
The wire size must be properly sized to handle the related
current.
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.
The use of aluminum wire will void the warranty.
Component failure due to improper voltage application will
void the warranty.
The manufacturer reserves the right to make changes in
specifications at any time without notice or obligation.
!WARNING
208 VAC and 230/240 VAC are not the same. Any
damage done to dryer components due to improper
voltage connections will automatically void the
warranty.
Electrical Service Specifications
IMPORTANT: Figures shown are for non-reversing models
only. For reversing models contact the factory.
Gas and Steam Models Only
Check your national and local codes for breaker and wire sizes 11/12/14
NOTES ______________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
ELECTRICAL SERVICE SPECIFICATIONS (PER DRYER)
IMPORTANT:
NOTES: A.
B.
C.
208 VAC AND 230/240 VAC ARE NOT THE SAME. When ordering, specify
exact voltage.
When fuses are used they must be dual element, time delay, current limiting,
class RK1 or RK5 ONLY. Calculate/determine correct fuse value, by applying
either local and/or National Electrical Codes to listed appliance amp draw data.
Circuit breakers are thermal-magnetic (industrial) motor curve type ONLY. For
others, calculate/verify correct breaker size according to appliance amp draw
rating and type of breaker used.
Circuit breakers for 3-phase (3ø) dryers must be 3-pole type.
SERVICE
VOLTAGE PHASE WIRE SERVICE
APPROX.
AMP DRAW CIRCUIT
BREAKER
60 Hz 50 Hz
120 1ø 2 8.7 —15
208 1ø 2 5.2 —15
220 1ø 2 4.8 3.8 15
230 1ø 2 4.8 4 15
240 1ø 2 —5.6 15
208 3ø 3 3 —15
230 3ø 3 3.2 3.8 15
240 3ø 3 3.2 3.6 15
380 3ø 3 2.9 —15
460-480 3ø 3 2.1 —15
380-400 3ø 4 or 3 —2.2 15
416 3ø 4 or 3 —2.2 15

113237 -19 www.adclaundry.com 13
Check your national and local codes for breaker and wire sizes 10/5/20
Grounding
A ground (earth) connection must be provided and installed
in accordance with local, state, and national regulations or
codes of the country of destination. In the absence of these
codes, grounding must conform to applicable requirements
of National Electric Code ANSI/NFPA 70, or in Canada, the
installation must conform to applicable Canada Standards:
Canadian Electric Code CSA C22.1. The ground connection
may be to a proven earth ground at the location service panel.
Electric Models Only
All electrically heated dryers must be connected to the electric
service shown on the dryer’s data label. The connecting
wires must be properly sized to handle the rated current.
For added personal safety, when possible, it is suggested that
a separate ground wire (no. 18 minimum) be connected from
the ground connection of the dryer to a grounded cold water
pipe. Do not ground to a gas pipe or hot water pipe. The
grounded cold water pipe must have metal-to-metal connection
all the way to the electrical ground. If there are any nonmetallic
interruptions, such as, a meter, pump, plastic, rubber, or other
insulating connectors, they must be jumped out with no. 4 copper
wire and securely clamped to bare metal at both ends.
IMPORTANT: For personal safety and proper operation,
the dryer must be grounded.
Provisions are made for ground connection in each dryer at
the electrical service connection area.
Electrical Connections
A wiring diagram is located inside the control box for
connection data.
If local codes permit, power to the dryer can be made by the
use of a flexible UL listed power cord/pigtail (wire size must
conform to rating of dryer), or the dryer can be hard wired
directly to the service breaker panel. In both cases, a strain
relief must be installed where the wiring enters the dryer.
Gas and Steam Models Only
IMPORTANT: A separate protected circuit must be
provided to each dryer.
Single-Phase (1ø)
Wiring Connections / Hookup
The electrical input connections on all single-phase (1ø) gas
dryers and steam dryers are made into the rear service box
located at the upper left area of the dryer.
ELECTRICAL SERVICE SPECIFICATIONS (PER DRYER)
IMPORTANT:
NOTES: A.
B.
C.
208 VAC AND 230/240 VAC ARE NOT THE SAME. When ordering, specify exact
voltage.
When fuses are used they must be dual element, time delay, current limiting, class
RK1 or RK5 ONLY. Calculate/determine correct fuse value, by applying either local
and/or National Electrical Codes to listed appliance amp draw data.
Circuit breakers are thermal-magnetic (industrial) type ONLY. For others, calculate/
verify correct breaker size according to appliance amp draw rating and type of
breaker used.
Circuit breakers for 3-phase (3ø) dryers must be 3-pole type.
SERVICE
VOLTAGE PHASE WIRE SERVICE
OVEN
kW
APPROX. AMP DRAW CIRCUIT
BREAKER
60 Hz 50 Hz
SINGLE-PHASE HEAT, SINGLE-PHASE MOTOR
208 1ø 2 15 77 — 100
208 1ø 2 20 101 — 150
220 1ø 2 17 83 — 125
230 1ø 2 14 66 — 90
230 1ø 2 18.5 85 — 125
240 1ø 2 15 67 68 90
240 1ø 2 20 88 — 125
240 1ø 2 24 105 — 150
THREE-PHASE HEAT, SINGLE-PHASE MOTOR
208 3ø 3 24 72 — 90
220 3ø 3 20 56 — 70
230 3ø 3 22 60 — 80
380 3ø 4 13 — 26 40
380 3ø 4 17 — 30 40
380 3ø 4 23 — 39 50
380 3ø 4 25 41 — 60
400 3ø 4 27.7 45 — 60
416 3ø 4 18.5 — 30 40
416 3ø 4 20 — 32 40
416 3ø 4 24 — 36 50
416 3ø 4 30 47 — 60
THREE-PHASE HEAT, THREE-PHASE MOTOR
208 3ø 3 20 59 — 80
220 3ø 3 20 56 — 70
220 3ø 3 20 — 56 80
230 3ø 3 22 58 59 80
240 3ø 3 24 61 61 80
240 3ø 3 27 — 69 80
380 3ø 4 or 3 15 — 29 40
380 3ø 4 or 3 20 — 37 50
380 3ø 3 23 38 — 50
380 3ø 4 or 3 23 — 41 50
380 3ø 3 26 42 — 60
400 3ø 4 or 3 22 — 37 50
400 3ø 4 or 3 25 — 41 50
416 3ø 4 or 3 24 — 39 50
416 3ø 4 or 3 27 — 43 50
440 3ø 3 20 28 — 40
460 3ø 3 22 30 — 40
480 3ø 3 24 31 — 40

14 American Dryer Corp. 113237 -19
For 208-230/240V Applications
A ground lug is provided in the rear electrical box to connect
your service ground.
The neutral will only be used on 4-wire service. This is typical
for 380-416V, 50 Hz.
Electrically Heated Models Only
The only electrical input connections to the dryer are the
3-phase (3ø) power leads (L1, L2, L3, and sometimes
neutral) and ground. Single-phase (1ø) power for the control
circuit and for any single-phase (1ø) motors (if present) is
done internally to the dryer by the factory at the oven contactor.
No single-phase (1ø) input connection is required on a
3-phase (3ø) dryer.
CAUTION: The dryer must be grounded. A ground lug
has been provided for this purpose.
Input connection wiring must be sized properly to handle the
dryer’s current draw. This information is printed on the dryer’s
data label.
The electrical input connections are made at the electric oven
contactor located inside the assembly at the rear center upper
section of the dryer. The ground connection is made to a
copper lug also provided in this area. To gain access, remove
oven rear service cover.
For 110V Applications
Single-Phase Electrical Lead Connections
Black
+
Positive
White or Red
+
Neutral
or L2
Green
+
Ground
3-Phase (3ø) Wiring Connections / Hookup
The electrical connections on all 3-phase (3ø) gas and steam
dryers are made into the rear service box located at the upper
left area of the dryer. The electrical connections are made at
the power distribution block located in the service box. The
ground connection is made to the copper lug, also provided
in this box. To gain access, the service box cover must be
removed.

113237 -19 www.adclaundry.com 15
TYPE OF GAS
Btu/hr
Rating
kcal/hr
Rating
Natural Propane
Qty. D.M.S.*Part No. Qty. D.M.S.*Part No.
78,000 19,656 2 #31 140818 2 #50 140802
Propane Conversion Kit Part Number 882267
Gas Information _______________________
It is your responsibility to have all plumbing connections,
materials, and workmanship conform to local and state
regulations or codes of the country of destination. In the
absence of such codes, all plumbing connections, materials,
and workmanship must conform to the applicable local
requirements. In the USA this is National Fuel Gas Code
ANSI Z223.1/NFPA 54, or in Canada, Natural Gas and
Propane Installation Code CSA B149.1.
In Australia, the fuel gas code is AS/NZS5601, local authority,
gas, electricity, and any other relevant statutory regulations.
IMPORTANT: Failure to comply with codes or ordinances,
and/or requirements in this manual, can result in personal
injury and improper operation of the dryer.
The dryer and its individual shutoff valves must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess
of 1/2 psig (3.5 kPa). The dryer must be isolated from the
gas supply piping system by closing its individual manual
shutoff valve during any pressure test of the gas supply piping
system at test pressures equal to or less than 1/2 psig (3.5
kPa).
IMPORTANT: Failure to isolate or disconnect the dryer
from supply as noted can cause irreparable damage to the
gas valve, which will void the warranty.
!WARNING
Fire or explosion could result due to failure of isolating
or disconnecting the gas supply as noted.
Gas Supply
The gas dryer installation must meet the American National
Standard...National Fuel Gas Code ANSI Z223.1-LATEST
EDITION, or in Canada, the Canadian Installation Codes
CAN/CGA-B149.1 M91 (Natural Gas) or CAN/CGA-B149.2-
M91 (Propane Gas) or LATEST EDITION, as well as local
codes and ordinances and must be done by a qualified
professional.
NOTE: Undersized gas piping will result in ignition
problems, slow drying, increased use of energy, and can
create a safety hazard.
The dryer must be connected to the type of heat/gas indicated
on the dryer data label. If this information does not agree
with the type of gas available, do not operate the dryer. Contact
the reseller who sold the dryer or contact the manufacturer.
IMPORTANT: This gas dryer is not provided with an
internal gas supply shutoff and an external gas supply
shutoff must be provided.
Technical Gas Data
Gas Specifications
For Australia, refer to data plate.
Shaded area is stated in metric equivalent
* D.M.S. equivalents are as follows:
Natural Gas ............. #31 = 0.1200” (3.048 mm).
Propane Gas ............ #50 = 0.0700” (1.778 mm).
Shaded areas are stated in metric equivalents
* Measured at gas valve pressure tap when the gas valve is on.
Gas Connections
Inlet connection ............... 1/2” N.P.T.
Inlet supply size .............. 1/2” Pipe (minimum)
Heat input (per dryer) ...... 78,000 Btu/hr (19,656 kcal/hr)
Natural Gas
Regulation is controlled by the dryer’s gas valve’s internal
regulator. Incoming supply pressure must be consistent
between a minimum of 6.0 in WC (19.92 mb) and a maximum
of 12.0 in WC (29.9 mb) pressure.
Propane Gas
Dryers made for use with propane gas have the gas valve’s
internal pressure regulator blocked open so that the gas
pressure must be regulated upstream of the dryer. The
pressure measured at each gas valve pressure tap must be
a consistent 10.5 in WC (26.2 mb). There is no regulator or
regulation provided in a propane dryer. The pressure must
be regulated at the source (propane tank) or an external
regulator must be added to each dryer.
Type of Gas Manifold Pressure*In-Line Pressure
Natural 3.5 in WC 6.0 - 12.0 in WC
8.7 mb 14.92 - 29.9 mb
Propane 10.5 in WC 11.0 in WC
26.1 mb 27.4 mb
IMPORTANT: Any burner changes or conversions must be
made by a qualified professional.
The input ratings shown on the dryer data label are for
elevations up to 2,000 feet (610 meters), unless elevation
requirements of over 2,000 feet (610 meters) were specified
at the time the dryer order was placed with the factory. The
adjustment or conversion of dryers in the field for elevations
over 2,000 feet (610 meters) is made by changing each burner
orifice. If this conversion is necessary, contact the reseller
who sold the dryer or contact the manufacturer.
IMPORTANT: This gas dryer is not provided with an
internal gas supply shutoff and an external gas supply
shutoff must be provided.
Technical Gas Data
Gas Specifications
For Australia, refer to data plate.
IMPORTANT: A strain relief
must be used where the
input wiring enters the
oven assembly.

16 American Dryer Corp. 113237- 19
Piping Connections
All components/materials must conform to National Fuel Gas
Code Specifications ANSI Z223.1-LATEST EDITION, or in
Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-
B149.2-M91 (Propane Gas) or LATEST EDITION (for General
Installation and Gas Plumbing), as well as local codes and
ordinances and must be done by a qualified professional. It
is important that gas pressure regulators meet applicable
pressure requirements, and that gas meters be rated for the
total amount of all the appliance Btu being supplied.
Installer within Australia – refer to AS/NZS5601.1 for guidance
on gas supply pipe sizing required for this appliance
installation.
The dryer is provided with a 1/2” N.P.T. inlet pipe connection
extending out the back area of the burner box. The minimum
pipe size (supply line) to the dryer is 1/2” pipe. For ease in
servicing, the gas supply line of each dryer must have its
own shutoff valve.
The size of the main gas supply line (header) will vary
depending on the distance this line travels from the gas
meter or, in the case of propane gas, the supply tank, other
gas-operated appliances on the same line, etc. Specific
information regarding supply line size should be determined
by the gas supplier.
NOTE: Undersized gas supply piping can create a low or
inconsistent pressure, which will result in erratic operation
of the burner ignition system.
IMPORTANT: This gas dryer is not provided with an
internal gas supply shutoff and an external gas supply
shutoff must be provided.
Consistent gas pressure is essential at all gas connections.
It is recommended that a 3/4-inch (19.05 mm) pipe gas loop
be installed in the supply line servicing a bank of dryers. An
in-line pressure regulator must be installed in the gas supply
line (header) if the (natural) gas pressure exceeds 12.0 in
WC (29.9 mb) pressure (refer to the illustration below).

113237-19 www.adclaundry.com 17
NOTE: A water column test pressure of 3.5 in WC (8.7 mb)
for natural gas and 10.5 in WC (26.1 mb) for propane
dryers is required at the gas valve pressure tap of each
dryer for proper and safe operation.
A plugged tap 1/8” N.P.T. minimum, accessible for a pressure
gauge connection, must be installed in the main gas supply
line immediately upstream of the dryers.
IMPORTANT: Pipe joint compounds that resist the action of
natural gas and propane gas must be used.
Test all connections for leaks by brushing on a soapy
water solution (liquid detergent works well).
The dryer and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
NOTE: The dryer must be isolated from the gas supply
piping system by closing its individual manual shutoff
valve during any pressure test of the gas supply system at
test pressures equal to or less than 1/2 psig (3.5 kPa).
!WARNING
Never test for leaks with a flame!!!
Steam Information ____________________
It is your responsibility to have all plumbing connections made
by a qualified professional to ensure that the steam plumbing
installation is adequate and conforms with local and state
regulations or codes.
Care must be exercised when leveling steam dryers into
final position. After leveling the dryer, check the downward
pitch of the heat exchanger from front to rear with a level.
Likewise, check the downward pitch of the return condensate
manifold toward its outlet part. Absence of these downward
pitches will result in probable water hammer and premature
heat exchanger fracture and leakage.
The presence of condensate in the steam will cause water
hammer and subsequent heat exchanger failure. The steam
supply connection must be taken from the top of a well-
dripped steam main. If the supply run-out to the dryer
exceeds 20 feet (6.1 meters), it should be dripped just before
the control valve with a proper trap and dirt pocket.
IMPORTANT: Failure to comply with the requirements
stipulated in this manual can result in component failure,
which will void the warranty.
NOTE: This dryer is manufactured with a pneumatic
(piston) damper system, which requires an external supply
of air (80 psi ± 10 psi [5.51 bar ± 0.68 bar]).
Steam Coil pH Level
The normal pH level for copper type steam coils must be
maintained between a value of 8.5 to 9.5. For steel type
steam coils the pH level must be maintained between a
value of 9.5 to 10.5. These limits are set to limit the acid
attack of the steam coils.
Shaded areas are stated in metric equivalents
* The minimum operating pressure for optimum results is 100 psig (689.47
kPa).
Installation Instructions
To ensure an adequate supply of steam is provided, be sure
that the steam supply line and steam return line are sized
and laid out as stipulated in this manual. Inadequate steam
supply line and steam return line or improper steam
plumbing will result in poor performance and can cause
component failure. Clean, dry steam must be provided to
the dryer.
IMPORTANT: Steam coil failure due to water hammer by
wet steam will void the warranty.
The presence of condensate in the steam supply line will
cause water hammer and subsequent heat exchanger
(steam coil) failure. The steam supply connection into the
main supply line must be made with a minimum 10-inch
(25.4 cm) riser. This will prevent any condensate from
draining towards the dryer.
The steam supply line to the dryer must include a 12-inch
(30.48 cm) riser along with a drip trap and check valve. This
will prevent any condensate from entering the steam coil.
Flexible hoses or couplings must be used. The dryer vibrates
slightly when it runs and this will cause the steam coil
connections to crack if they are hard piped to the supply and
return mains.
Shutoff valves for each dryer should be installed in the supply
line, return line, and drip trap return line. This will allow the
dryer to be isolated from the supply main and the return main
if the dryer needs maintenance work.
Install an inverted bucket steam trap and check valve at least
12-inches (30.48 cm) below the steam coil as close to the
coil as possible. A trap with a capacity of 350 lb (160 kg) of
condensate per hour at 125 psi (8.61 bar) is needed for
each unit.
The supply line and the return line should be insulated. This
will save energy and provide for the safety of the operator
and maintenance personnel.
Water pockets in the supply line, caused by low points, will
provide wet steam to the coil possibly causing steam coil
damage. All horizontal runs of steam supply piping should
be pitched 1/4-inch (6.35 mm) for every 1 foot (0.30 meters)
back towards the steam supply header causing the
condensate in the line to drain to the header. Install a bypass
trap in any low point to eliminate wet steam.
IMPORTANT: Coil failure due to improper pH level will void
the warranty.
Steam Requirements
Operating Steam Pressure
Maximum 125 psig*861.84 kPa
Heat Input (Normal Load) 2.9 Bhp
Consumption (Approximate) 98.8 lb/hr 44.8 kg/hr

18 American Dryer Corp. 113237- 19
IMPORTANT: Flexible hoses/couplings must be used.
Coil failure due to hard plumbing connections will void the
warranty.
Steam Damper Air System Connections
Compressed Air Supply Air Pressure
Normal 80 psi 5.51 bar
Minimum Supply 70 psi 4.82 bar
Maximum Supply 90 psi 6.21 bar
This dryer is manufactured with a pneumatic (piston) damper
system, which requires an external supply of compressed
air. The air connection is made to the steam damper solenoid
valve, which is located at the rear inner top area of the dryer
just in front of the electric service relay box.
Air Requirements
There is no air requirement for dryers with the
electromechanical steam damper option.
Shaded areas are stated in metric equivalents
Air Connection
Air connection to system — 1/8” N.P.T.
Air Regulation
No air regulator or filtration is provided with the dryer. External
regulation/filtration of 80 psi (5.51 bar) must be provided. It
is suggested that a regulator/filter gauge arrangement be
added to the compressed air line just before the dryer
connection. This is necessary to ensure that correct and
clean air pressure is achieved.

113237-19 www.adclaundry.com 19
Steam Damper System Operation
The steam damper, as shown in the illustration below, allows the coil to
stay constantly charged eliminating repeated expansion and contraction.
When the damper is opened, the air immediately passes through the
already hot coil, providing instant heat to start the drying process. When
the damper is closed, ambient air is drawn directly into the tumbler,
allowing a rapid cool down.
Diagram 1 shows the damper in the heating (open) mode, allowing
heat into the tumbler.
Diagram 2 shows the damper in the cool down (closed) mode, pulling
ambient air directly into the tumbler without passing through the coils.
Preparation
for Operation / Start-Up ________
The following items should be checked before
attempting to operate the dryer:
• Read all “Caution”, “Warning”, and “Direction”
labels attached to the dryer.
• Check incoming supply voltage to be sure that
it is the same as indicated on the dryer data
label.
• Gas Models – check to ensure that the dryer is
connected to the type of heat/gas indicated on
the dryer data label.
• Gas and Electric Models – the sail switch
damper assembly was installed and adjusted
at the factory prior to shipping. However, each
sail switch adjustment must be checked to
ensure that this important safety control is
functioning.
• Check bolts, nuts, screws, terminals, and
fittings for tightness and security.
• Gas Models – be sure that all gas shutoff
valves are in the open position.
• Check all back guard panels and service box
covers have been replaced.
• Check the lint drawer to ensure that it is
closed and secured in place.
• Rotate the tumbler (drum) by hand to be sure
it moves freely.
• Steam Models – check to ensure that a clean,
dry, regulated air supply (80 psi [5.51 bar]) is
on the dryer (with air-operated damper system
only).
• Steam Models – check to ensure all steam
shutoff valves are open.
• Steam Models – check steam damper
operation.
• Check tumbler bearing setscrews to ensure
that they are all tight.
• Check that the vent is connected to the dryer
and is exhausted to the outdoors.
NOTE: With the dryer off or with no air supply, the steam damper is in
cool down mode as shown in Diagram 2.
Steam Damper Air Piston (Flow Control)
Operation Adjustment
Damper operation was tested and adjusted prior to shipping at 80 psi
(5.51 bar). If damper air adjustment is necessary, locate the flow control
valve and make the necessary adjustments as noted below.

20 American Dryer Corp. 113237 -19
Preoperational Test ___________________
All dryers are thoroughly tested and inspected before leaving
the factory. However, a preoperational test should be
performed before the dryer is publicly used. It is possible
that adjustments have changed in transit or due to marginal
location (installation) conditions. Installer must instruct the
user on how to correctly operate the dryer before leaving.
Turn on electric power to the dryer.
Refer to the operating instructions for starting your particular
model dryer.
Gas Models Only
When a gas dryer is first started (during initial start-up), it
has a tendency not to ignite on the first ignition attempt. This
is because the gas supply piping is filled with air, so it may
take a few minutes for the air to be purged from the lines.
NOTE: During the purging period, check to be sure that all
gas shutoff valves are open.
Gas model dryers are equipped with an ignition system,
which has internal diagnostics. If ignition is not established
after one time, the heat circuit in the ignition module will
attempt two more ignitions (total of three ignition attempts).
If there is no flame after the third ignition attempt, the module
will lockout until it is manually reset. To reset the ignition
system, open and close the main door and restart the dryer.
A gas pressure test should be taken at the gas valve pressure
tap of each dryer to ensure that the water column pressure is
correct and consistent.
NOTE: Water column pressure requirements (measured at
the pressure tap of the gas valve body):
Natural Gas _____3.5 in WC (8.7 mb).
Propane Gas ____10.5 in WC (26.2 mb).
IMPORTANT: There is no regulator provided in a propane
dryer. The water column pressure must be regulated at the
source (propane tank), or an external regulator must be
added to each dryer.
Make a complete operational check of all safety related
circuits:
• Door Switch(es)
• Hi-Limit Thermostats
• Cycling Thermostat
• Gas and Electric Models Only – Sail Switch
NOTE: The sail switch can be checked for proper
operation by opening the lint trap door. While pushing the
lint door switch in, start a drying cycle. The heating unit
should not activate (wait 30-seconds). If heat does
activate, make the necessary adjustments to the sail
switch.
Make a complete operational check of all operating controls.
NOTE: If computer program changes are required, refer to
the computer programming section of the manual supplied
with the dryer.
The dryer should be operated through one complete cycle to
ensure that no further adjustments are necessary and that
all components are functioning properly.
Tumbler Coating
The tumbler is treated with a protective coating. We suggest
dampening old garments or cloth material with a solution of
water and nonflammable mild detergent and tumbling them
in the tumbler to remove this coating.
Check the electric service phase sequence (3-phase [3ø]
models only). While the dryer is operating, check to see if
the blower motor (impellor/fan) is rotating in the proper
direction. Looking from the front, the blower motor (impellor/
fan) should spin in the clockwise direction. If it is, the phasing
is correct. If the phasing is incorrect, reverse two of the three
leads at connections L1, L2, and L3 of the power supply to
the dryer.
IMPORTANT: If the blower motor (impellor/fan) is rotating
in the wrong direction, it will drastically reduce drying
efficiency and it can also cause premature component
failure.
Preoperational Instructions __________
Microprocessor Controller (Computer)
Coin Models
When the microprocessor controller (computer) is in the
ready state, the L.C.D. screen will display “Ready, Insert
$XX.XX (amount) to Start”.
Insert coin(s). Once the correct “Amount to Start” has been
inserted, the L.C.D. will display “Select Temperature”.
Select temperature by pressing “HI,” “MED,” or “LO”. The
cycle will start and the L.C.D. will display the dry cycle selected
and the remaining time.
The dryer will continue through the drying and cooling cycles,
until the vended time has expired.
NOTE: To stop dryer, open main door or press the “Pause”
key. Continuation of the cycle will resume only after the
door has been closed and any of the three temperature
selections is pressed.
Upon completion of the drying and cooling cycles, the tone
(buzzer) will sound and the dryer will go into the Anti-Wrinkle
Mode for 99 minutes, or until the main door has been opened.
IMPORTANT: For more detailed information regarding the
microprocessor controller (computer) on your dryer, refer to
the microprocessor user’s manual included with the dryer.
Mechanical Drop / Rotary Coin Meter
or Slide Coin Meter
Insert coin and turn knob (rotary type meter), or for slide meter
unit, push in coin chute.
Select temperature.
Push the “Start” button.
To stop dryer, open the main door.