ADC ML-758DV User manual

AD-758DV / ML-758DV
Installation Manual
Phase 7 / DSI / Dual Timer
WFR113230-25
AVERTISSEMENT:Assurez-vous de
bien suivre les instructions données
dans cette notice pour réduire au
minimum le risqué 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 server des téléphones se
trouvant dans la 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 or to prevent property damage,
personal injury or death.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any 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.
American Dryer Corporation
88 Currant Road, Fall River MA 02720-4781 USA / Telephone: [phone] / Fax: [phone]
e-mail: [email protected] / www.adclaundry.com
!!
!!
!!!
!!
!

2 American Dryer Corp. WFR113230-25
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.
“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.
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.

WFR113230- 25 www.adclaundry.com 3
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.
CAUTION
Dryers should never be left unattended while in operation.
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 dryers in
operation.
Under no circumstances should the dryer door switches,
lint drawer switch, or heat safety circuit 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 or weather.
The wiring diagram for the dryer is located in the front
electrical control box area.
Table of Contents ______________
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.
In the State of Massachusetts, the following
installation instructions apply:
■Installations and repairs must be performed
by a qualified or licensed contractor,
plumber, or gasfitter qualified or licensed
by the State of Massachusetts.
■If using a ball valve, it shall be a T-handle
type.
List of Acronyms _____________________
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
UL Underwriters Laboratory
!WARNING
Safety Precautions ............................................ 4
Specifications .................................................... 6
Component Identification .................................. 8
Installation Procedures ..................................... 8
Location Requirements .............................................. 8
Unpacking / Setting Up ............................................... 9
Dryer Enclosure Requirements ................................. 9
Fresh Air Supply Requirements .............................. 10
Exhaust Requirements ............................................. 10
Electrical Information ................................................ 13
Gas Information ........................................................ 17
Steam Information .................................................... 19
Preparation for Operation / Start-Up ....................... 21
Preoperational Test .................................................. 21
Preoperational Instructions ..................................... 22
Shutdown Instructions ............................................ 23
Service / Parts Information ............................. 23
Service ..................................................................... 23
Parts .......................................................................... 23
Warranty Information ...................................... 23
Returning Warranty Cards ...................................... 23
Warranty .................................................................. 24
Returning Warranty Parts ....................................... 24
Routine Maintenance ....................................... 24
Cleaning .................................................................... 24
Adjustments ............................................................. 25
Lubrication ................................................................ 25
Lint Drawer Removal ............................................... 25
Data Label Information .................................... 25
Procedure for Functional Check
of Replacement Components ......................... 26
Manual Reset Burner Hi-Limit Instructions ...27
Fire Suppression System ................................28
Non-Coin Programming ................................... 32
Coin Programming ........................................... 33

4 American Dryer Corp. WFR113230-25
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 and 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.
Dryers 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,
combustible detergents, 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 also 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 must be electrically grounded
in accordance with local and/or country codes. In the
absence of these codes use 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.
Under no circumstances should the dryer door switches,
lint drawer switch, or heat safety circuit ever be disabled.
!WARNING
Personal injury or fire could result should the dryer
door switches, lint drawer switch, or 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 66%, 50 lb
(22.7 kg) of its rated capacity.
!WARNING
You must discontinue 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: The dryer must be installed in a location/
environment, which the ambient temperature remains
between 40° F (4.44° C) and 130° F (54.44° C).

WFR113230-25 www.adclaundry.com 5
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.
NOTES _____________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
NOTES _____________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________

6 American Dryer Corp. WFR113230-25
MAXIMUM CAPACITY (DRY WEIGHT) 75 lb 34.02 kg
TUMBLER DIAMETER 36-1/4” 92.08 cm
TUMBLER DEPTH 36” 91.44 cm
TUMBLER VOLUME 21.50 cu ft 608.81 L
TUMBLER (DRIVE) MOTOR
Non-Reversing / Reversing 1 hp / 1/2 hp*0.75 kW / 0.37 kW
BLOWER (FAN) MOTOR
Non-Reversing / Reversing — / 1 hp*— / 0.75 kW
DOOR OPENING (DIAMETER) 31-3/8” 79.69 cm
DOOR SILL HEIGHT 28” 71.12 cm
WATER CONNECTION 3/4”-11.5 NH
(North America)
3/4” B.S.P.T. (Outside North America)
DRYERS PER 20’/40’ CONTAINER 9 / 20
DRYERS PER 48’/53’ TRUCK 24 / 26
VOLTAGE AVAILABLE 120-575V 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 721 lb 327.04 kg
APPROXIMATE SHIPPING WEIGHT 773 lb 350.63 kg
AIRFLOW 60 Hz 1,000 cfm 28.32 cmm
50 Hz 833 cfm 23.60 cmm
HEAT INPUT 175,000 Btu/hr 44,099 kcal/hr
EXHAUST CONNECTION (DIAMETER) 8” 20.32 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
INLET PIPE CONNECTION 3/4” F.N.P.T.
3/4” B.S.P.T.
(CE and Australia Only)
VOLTAGE AVAILABLE 208-575V 3ø 3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 721 lb 327.04 kg
APPROXIMATE SHIPPING WEIGHT 773 lb 350.63 kg
AIRFLOW 60 Hz 1,000 cfm 28.32 cmm
50 Hz 833 cfm 23.60 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
30 102,400 25,800
VOLTAGE AVAILABLE 120-575V 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 816 lb 370.13 kg
APPROXIMATE SHIPPING WEIGHT 868 lb 393.72 kg
AIRFLOW 60 Hz 1,200 cfm 33.98 cmm
50 Hz 1,000 cfm 28.32 cmm
STEAM CONSUMPTION 275 lb/hr 124.7 kg/hr
OPERATING STEAM PRESSURE 125 psi max 8.62 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) 7.2 Bhp
SUPPLY CONNECTION (1) 1” N.P.T.
(Female)
RETURN CONNECTION (1) 1” N.P.T. (Female)
Specifications _____________________________________________________________________
GASELECTRICSTEAM**
NOTE: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.
Shaded areas are stated in metric equivalents 1/5/15
* Reversing dryers use 3-phase (3ø) motors.
** Air-operated steam damper system requires a clean, dry, and regulated 80 psi +/- 10 psi (5.51 bar +/- 0.69 bar) air supply.

WFR113230-25 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. WFR113230-25
Component Identification ____________
Dryer Front View
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 (Propane 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).
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 (Propane Gas) or LATEST EDITION (for
General Installation and Gas Plumbing).
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
section).
Clearance provisions must be made from combustible
construction as noted in this manual (refer to Dryer
Enclosure Requirements section).
Provisions must be made for adequate clearances for
servicing and for operation as noted in this manual (refer to
Dryer Enclosure Requirements section).
The dryer must be installed with a proper exhaust duct
connection to the outside as noted in this manual (refer to
Exhaust Requirements section).
The dryer must be located in an area where correct exhaust
venting can be achieved as noted in this manual (refer to
Exhaust Requirements section).
IMPORTANT: The dryer should be located where a
minimum amount of exhaust ducting will be necessary.
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.
IMPORTANT: The dryer must be installed in a location/
environment, which the ambient temperature remains
between 40° F (4.44° C) and 130° F (54.44° C).
Illus. No. Description
1 Heating Unit
2 Electric Service Relay Box
3 Tumbler Bearing Mount Assembly
4 Idler Bearing Mount Assembly
5 Blower Motor Assembly (for reversing models only)
6 Leveling Legs (rear)
7 Tumbler (drive) Motor Assembly
8 Dryer Exhaust
9 Data Label and Installation Label
Illus. No. Description
1 Controls
2 Control (top access) Door Assembly
3 Main Door Assembly
4 Lint Compartment Area
(lint screen located behind lint door or left sidewall)
Dryer Rear View

WFR113230-25 www.adclaundry.com 9
Unpacking / Setting Up _______________
Remove protective shipping material (i.e., plastic wrap and
optional shipping box) from the 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.
To increase bearing life and improve efficiency, the dryer
should be tilted slightly to the rear.
The lint coops of this dryer are supported during shipping
by a bracket. Remove this bracket before starting the dryer.
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.
Dryer Enclosure Requirements _______
Bulkheads and partitions should be made of
noncombustible materials and must be located a minimum
of 12-inches (30.48 cm) (18-inches [45.72 cm] or more is
recommended for ease of installation, maintenance, and
service) above the dryer’s outer top, except along the front of
the dryer, which may be partially closed in if desired. The
clearance between the bulkhead header and the dryer must
be a minimum of 4-inches (10.16 cm) and must not extend
more than 4-inches (10.16 cm) to the rear of the front. The
bulkhead facing must not be closed in all the way to the top
of the dryer. A 1-inch (2.54 cm) clearance is required.
NOTE: Allowances must be made for opening the control
door.
Dryers may be positioned sidewall to sidewall. However, a
1/16” (1.5875 mm) minimum allowance must be made for
the opening and closing of the control door and the lint door.
It is suggested that the dryer be positioned about 2 feet
(0.61 meters) away from the nearest obstruction for ease of
installation, maintenance, and service (to be measured from
the back guard). Refer to the illustration below for details.
NOTE: Air considerations are important for proper and
efficient operation.
IMPORTANT:
Even though a minimum of only 12-inches
(30.48 cm) is required, 18-inches (45.72 cm) or more is
suggested. The additional clearance is advantageous for
ease of installation and service.

10 American Dryer Corp. WFR113230-25
IMPORTANT: When fire sprinkler systems are located
above the dryers, a minimum of 18-inches (45.72 cm)
above the dryer console (module) is required. Dryers
may be positioned sidewall to sidewall however, a 1/16”
(1.5875 mm) minimum allowance is required between
dryers (or wall) for ease of installation and maintenance.
Allowances must be made for the opening and closing of
the control door and the lint door.
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.
When the dryer is operating, it draws in room air, heats it,
passes this air through the 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 ensure proper performance of each dryer. An unrestricted
source of air is necessary for each dryer. An airflow of 1,000
cfm (cubic feet per minute), (28.3 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 1-1/2 square feet (0.14 square meters) is
required for each dryer. The dryer must be installed with
provisions for adequate combustion and make-up air supply.
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.
Exhaust Requirements _______________
General Exhaust Ductwork Information
Exhaust ductwork should be designed and installed by a
qualified professional. Improperly sized ductwork will create
excessive back pressure, which results in slow drying,
increased use of energy, overheating of the dryer, and
shutdown of the burner by the airflow (sail) switches, burner
hi-limits, or basket hi-heat thermostats. The dryer must be
installed with a proper exhaust duct connection to the
outside.
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.
IMPORTANT: Exhaust back pressure measured by a
manometer/magnehelic in the exhaust duct must be no
less than 0 and must not exceed 0.7 in WC (1.74 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 0.7 inch water column.
Where employed, booster fans must not activate the dryer
airflow proving switch (sail switch) when the dryer is not in
operation.
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.
To compensate for the use of registers or louvers used over
the openings, this make-up air must be increased by
approximately thirty-three percent. Make-up air openings
should not be located in an area directly near where exhaust
vents exit the building.
It is not necessary to have a separate make-up air opening
for each dryer. Common make-up air openings are
acceptable. However, they must be set up in such a manner
that the make-up air is distributed equally to all the dryers.
EXAMPLE: For a bank of four dryers, two unrestricted
openings measuring 2 feet by 1-1/2 feet (0.61 meters by
0.46 meters), (6 square feet [0.56 square meters]) are
acceptable.

WFR113230-25 www.adclaundry.com 11
Horizontal Venting
When single dryer venting is used, the length of ductwork
from the dryer to the outside exhaust outlet must not exceed
25 feet (7.62 meters). The minimum diameter of this
ductwork must be at least 8-inches (20.32 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
tumbler/dryer elbow connections or elbows used for outside
protection from the weather, no more than two elbows should
be used in the exhaust duct run. If more than two 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.
Vertical Venting
When single dryer venting is used, the length of the ductwork
from the dryer to the outside exhaust outlet must not exceed
15 feet (4.57 meters). The minimum diameter of this
ductwork must be at least 8-inches (20.32 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 so
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° bends instead. The radius of the elbows
should preferably be 1-1/2 times the diameter of the duct.
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/magnehelic in the exhaust duct must be no
less than 0 and must not exceed 0.7 in WC (1.74 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 0.7 inch water column.
Where employed, booster fans must not activate the dryer
airflow proving switch (sail switch) when the dryer is not in
operation.
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.
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.”
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 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.
IMPORTANT: Do not use screens, louvers, or caps on the
outside opening of the exhaust ductwork.

12 American Dryer Corp. WFR113230-25
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: Exhaust back pressure measured by a
manometer/magnehelic in the exhaust duct must be no
less than 0 and must not exceed 0.7 in WC (1.74 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 0.7 inch water column.
Where employed, booster fans must not activate the dryer
airflow proving switch (sail switch) when the dryer is not in
operation.
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 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.
NOTES _____________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
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 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.
IMPORTANT: Do not use screens, louvers, or caps on the
outside opening of the exhaust ductwork.

WFR113230-25 www.adclaundry.com 13
Multiple (Common) Dryer Venting
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 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 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.
IMPORTANT: Do not use screens, louvers, or caps on the
outside opening of the exhaust ductwork.
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
and state regulations or codes. In the absence of such
codes, All electrical connections, materials, and
workmanship must conform to the applicable requirements
of the National Electrical Code ANSI/NFPA NO. 70-LATEST
EDITION or in Canada, the Canadian Electrical Codes Parts
1 & 2 CSA C22.1-1990 or LATEST EDITION.
IMPORTANT: Failure to comply with these codes or
ordinances, and/or the requirements stipulated in this
manual can result in personal injury or component failure.
NOTE: Component failure due to improper installation will
void the warranty.
Each dryer should be connected to an independently
protected branch circuit. The dryer must be connected with
copper wire only. Do not use aluminum wire; it could create
a fire hazard. The copper conductor wire/cable must be of
proper ampacity and insulation in accordance with electric
codes for making all service connections.
NOTE: The use of aluminum wire will void the warranty.
IMPORTANT: A separate protected circuit must be
provided to each dryer.
NOTE: An individual ground circuit must be provided to
each dryer, do not daisy chain.

14 American Dryer Corp. WFR113230-25
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.
!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.
NOTE: 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.
Electrical Service Specifications
Gas and Steam Models Only
Check your local codes for breaker and wire sizes 6/9/15
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.
Check your local codes for breaker and wire sizes 4/26/17
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
NON-REVERSING
120 1ø 2 13 — 20
208 1ø 2 7.6 — 15
220 1ø 2 7.3 8.6 15
230 1ø 2 — 8 15
240 1ø 2 7 8 15
208 3ø 3 4.7 — 15
220 3ø 3 4.8 4.8 15
230 3ø 3 — 4.7 15
240 3ø 3 4.9 5.4 15
380 3ø 3 2.9 — 15
380 / 416 3ø 4 or 3 — 3.1 15
400 3ø 3 3 — 15
400 3ø 4 or 3 — 3.2 15
440 3ø 3 2.6 — 15
460 / 480 3ø 3 2.8 — 15
REVERSING
208 3ø 3 6.7 — 15
220 3ø 3 6.9 7.3 15
230 3ø 3 — 7.5 15
240 3ø 3 7.1 8.3 15
380 3ø 3 4.2 — 15
380 3ø 4 or 3 — 4.3 15
400 3ø 3 4.4 — 15
400 / 416 3ø 4 or 3 — 4.4 15
440 3ø 3 3.6 — 15
460 / 480 3ø 3 3.9 — 15
575 3ø 3 3.3 — 15
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
NON-REVERSING
SINGLE-PHASE HEAT, SINGLE-PHASE MOTOR
208 1ø 2 24 123 — 175
208 1ø 2 30 152 — 200
220 1ø 2 20 98 — 125
220 1ø 2 20 — 100 150
220 1ø 2 26 125 127 175
230 1ø 2 22 97 — 125
230 1ø 2 22 — 104 150
230 1ø 2 28 123 130 175
240 1ø 2 24 107 108 150
240 1ø 2 30 132 133 175
THREE-PHASE HEAT, SINGLE-PHASE MOTOR
208 3ø 3 24 74 — 100
208 3ø 3 30 91 — 125
220 3ø 3 20 60 61 80
220 3ø 3 26 76 77 100
220 3ø 3 30 86 — 125
230 3ø 3 22 56 63 80
230 3ø 3 28 71 78 100
240 3ø 3 24 65 66 90
240 3ø 3 30 79 — 100
240 3ø 3 30 — 80 125
380 3ø 4 20 — 39 50
380 3ø 4 26 — 48 70
400 3ø 4 22 — 40 60
400 3ø 4 28 — 48 70
416 3ø 4 24 — 41 60
416 3ø 4 30 49 50 70
THREE-PHASE HEAT, THREE-PHASE MOTOR
208 3ø 3 24 71 — 90
208 3ø 3 30 88 — 125
220 3ø 3 20 57 57 80
220 3ø 3 26 73 73 100
230 3ø 3 22 — 60 80
230 3ø 3 28 71 75 100
240 3ø 3 24 63 63 80
240 3ø 3 30 77 — 100
240 3ø 3 30 — 78 100
380 3ø 3 20 33 — 50
380 3ø 4 or 3 20 — 33 50
380 3ø 3 26 42 — 60
380 3ø 4 or 3 26 — 43 60
400 3ø 4 or 3 22 — 35 50
400 3ø 4 or 3 28 — 44 60
416 3ø 4 or 3 24 — 36 50
416 3ø 4 or 3 30 — 45 60
440 3ø 3 20 29 — 40
440 3ø 3 26 37 — 50
440 3ø 4 or 3 26 — 37 50
460 3ø 3 22 30 — 40
460 3ø 3 28 38 — 50
480 3ø 3 24 32 — 50
480 3ø 3 30 39 — 50

WFR113230-25 www.adclaundry.com 15
Check your local codes for breaker and wire sizes 4/26/17
Grounding
A ground (earth) connection must be provided and installed
in accordance with state and local codes. In the absence of
these codes, grounding must conform to applicable
requirements of the National Electrical Code ANSI/NFPA NO.
70-LATEST EDITION, or in Canada, the installation must
conform to applicable Canada Standards: Canadian
Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST
EDITION. The ground connection may be to a proven earth
ground at the location service panel.
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.
Single-Phase Electrical Lead Connections
Black
+
Positive
White or Red
+
Neutral
or L2
Green
+
Ground
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
REVERSING
THREE-PHASE HEAT, THREE-PHASE MOTOR
208 3ø 3 24 73 — 100
208 3ø 3 30 90 — 125
220 3ø 3 20 59 60 80
220 3ø 3 26 75 76 100
230 3ø 3 22 63 63 80
230 3ø 3 28 78 — 125
230 3ø 3 28 — 78 100
240 3ø 3 24 65 66 90
240 3ø 3 30 79 — 100
240 3ø 3 30 — 80 125
380 3ø 3 20 35 — 50
380 3ø 4 or 3 20 — 35 50
380 3ø 3 26 44 — 60
380 3ø 4 or 3 26 — 44 60
400 3ø 4 or 3 22 — 36 50
400 3ø 4 or 3 28 — 45 60
416 3ø 4 or 3 24 — 38 50
416 3ø 4 or 3 30 — 46 60
440 3ø 3 20 30 — 40
440 3ø 3 26 38 — 50
440 3ø 4 or 3 26 — 38 50
460 3ø 3 22 32 — 40
460 3ø 3 28 39 — 50
480 3ø 3 24 33 — 50
480 3ø 3 30 40 — 60
575 3ø 3 24 27 — 40
575 3ø 3 30 33 — 50

16 American Dryer Corp. WFR113230-25
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.
For 110V Applications
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.

WFR113230-25 www.adclaundry.com 17
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.
IMPORTANT: A strain relief must be used where the input
wiring enters the oven assembly.
Gas Information ______________________
It is your responsibility to have all plumbing connections
made by a qualified professional to ensure that the gas
plumbing installation is adequate and conforms to local
and state regulations or codes. In the absence of such
codes, all plumbing connections, materials, and
workmanship must conform to the applicable requirements
of the 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.
In Australia, the fuel gas code is AS/NZS5601, local authority,
gas, electricity, and any other relevant statutory regulations.
IMPORTANT: Failure to comply with these codes or
ordinances, and/or the requirements stipulated 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 system at test pressures equal to or less than 1/2
psig (3.5 kPa).
IMPORTANT: Failure to isolate or disconnect 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 ADC
factory.
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 (609.6 meters), unless elevation
requirements of over 2,000 feet (609.6 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 (609.6 meters) is made by
changing each burner orifice. If this conversion is necessary,
contact the reseller who sold the dryer or contact the ADC
factory.
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 areas are stated in metric equivalents
* Measured at outlet side of gas valve pressure tap when gas valve is on.
Gas Connections
Inlet connection _________ 3/4” N.P.T.
Inlet supply size _________ 3/4” N.P.T. (minimum)
Btu/hr input (per dryer) ____ 175,000 (44,100 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 (14.92 mb) and a maximum
of 12.0 in WC (29.9 mb) pressure.
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 12.0 - 13.0 in WC
26.1 mb 29.9 - 32.4 mb

18 American Dryer Corp. WFR113230-25
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 (26.1 mb). There is no regulator
or regulation 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.
Consistent gas pressure is essential at all gas connections.
It is recommended that a 3/4” (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.
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 1/8” N.P.T. plugged tap, accessible for a test gauge
connection, must be installed in the main gas supply line
immediately upstream of each dryer.
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).
!WARNING
Never test for leaks with a flame!!!
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.
IMPORTANT: 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).
TYPE OF GAS
Btu/hr
Rating
kcal/hr
Rating
Natural Propane
Qty. D.M.S.*Part No. Qty. D.M.S.*Part No.
175,000 44,100 4 #30 140819 4 #49 140803
Propane Conversion Kit Part Number 882230
Shaded area is stated in metric equivalent
* D.M.S. equivalents are as follows:
Natural Gas ............................. #30 = 0.1285” (3.2639 mm).
Propane Gas ............................ #49 = 0.0730” (1.8542 mm).
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 3/4” N.P.T. inlet pipe connection
located at the right side of the base of the dryer. The minimum
pipe size (supply line) to the dryer is 3/4” N.P.T. 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.

WFR113230-25 www.adclaundry.com 19
Operating Steam Pressure
Maximum 125 psig*861.84 kPa
Heat Input (Normal Load) 7.2 Boiler hp
Consumption (Approximate) 275 lb/hr 124.7 kg/hr
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.
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.
IMPORTANT: Coil failure due to improper pH level will
void the warranty.
Steam Requirement
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 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: In standard format 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]). This dryer may be provided with an optional steam
solenoid valve, in which case, no pneumatic steam
damper system is provided.

20 American Dryer Corp. WFR113230-25
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.
NOTE: With the dryer off or with no air supply, the steam
damper is in cool down mode as shown in Diagram 2.
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
Air Requirements
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.
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.
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 return
header, as close to the coil as possible.
A trap with a capacity of 600 lb (273 kg) of condensate per
hour at 125 psi (8.62 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.
Dryers with Optional Steam Solenoid Valve: Mount steam
solenoid valve in orientation shown, with coil up. The supply
line should be supported to prevent damage to the steam
coil due to the overhung weight of the steam solenoid valve.
IMPORTANT: Flexible hoses/couplings must be used.
Coil failure due to hard plumbing connections will void the
warranty.
Steam Damper Air System Connections
In standard format, this dryer is manufactured with a
pneumatic (piston) damper system, which requires an
external supply of compressed air. (Note: this dryer may be
provided with an optional steam solenoid valve in which
case no steam damper system is provided.) 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.