ADC AD-78 User manual

AD-78 Installation Manual
Phase 7 Microprocessor / Dual Timer
Rotary Meter / Fire Suppression System
ADC Part No. 113206-16
AVERTISSEMENT:Assurez-vousdebien
suivrelesinstructionsdonnéesdanscette
noticepourréduireauminimum le risque
d’incendie ou d’explosion ou pour éviter
toutdommagematériel,touteblessureou
lamort.
—Ne pas entreposer ni utiliser d’essence
nid’autresvapeursouliquides
inflammablesàproximitédecet
appareiloudetoutautreappareil.
—QUEFAIRESIVOUSSENTEZUNE
ODEURDEGAZ:
●Nepastenterd’allumerd’appareils.
●Netouchezàaucuninterrupteur. Ne
pasvousservirdestéléphonesse
trouvantdanslebâtiment.
●Évacuezlapièce,lebâtimentoula
zone.
●Appelezimmédiatementvotre
fournisseurdegazdepuis un voisin.
Suivezlesinstructionsdufournisseur.
●Sivousnepouvez rejoindre le
fournisseurdegaz,appelezle service
desincendies.
—L’installation et l’entretien doivent être
assurés par un installateur ou un
service d’entretien qualifié ou par le
fournisseurdegaz.
WARNING:Foryoursafetytheinformation
in this manual must be followed to
minimize the risk of fire or explosion and
to prevent property damage, personal
injuryordeath.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinityofthisor any other appliance.
— WHATTODO IFYOUSMELLGAS:
●Donottrytolight any appliance.
●Donottouch any electricalswitch;
donotuse any phoneinyour
building.
●Clearthe room, building or area of
alloccupants.
●Immediatelycallyour gassupplier
fromaneighbor’sphone. Follow
thegassupplier’sinstructions.
●Ifyoucannotreachyourgas
supplier,callthe fire department.
— Installation and service must be
performedbyaqualifiedinstaller,service
agencyorthegassupplier.
American Dryer Corporation
88CurrantRoad
FallRiver MA02720-4781 USA
Telephone:[phone] / Fax:[phone]
e-mail:[e-mail]
www.adclaundry.com

2 American Dryer Corp. 113206-16
“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
instructionsmustbepostedin a prominent locationnearthedryer.
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
nid’autresvapeursouliquides
inflammablesàproximitédecet
appareiloudetoutautreappareil.
Wehave tried tomakethis manual ascompleteas possibleandhopeyou willfindit useful. The manufacturerreserves
therightto make changes from time to time, withoutnoticeorobligation,in prices, specifications, colors, and material,
and to change or discontinue models. The illustrations included in this manual may not depict your particular dryer
exactly.
IMPORTANT
For your convenience, log the following information:
DATEOFPURCHASE _________________________________________________________ MODELNO. _____________
RESELLER’S NAME _________________________________________________________________________________
Serial Number(s) ____________________________________________________________________________________
___________________________________________________________________________________________________
___________________________________________________________________________________________________
Replacementpartscan be obtainedfrom your reseller or theADCfactory. Whenorderingreplacementparts 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,itis necessary to refer to the technicalinstructionswhichwillprovide 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
AD-78
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 displayedon the equipmentor specifiedin theinstallation
manual included with the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.

113206-16 www.adclaundry.com 3
IMPORTANT
Youmustdisconnect andlockouttheelectric supply
and the gas supply or the steam supply before any
covers or guards are removed from the machine
toallow access forcleaning, adjusting,installation,
or testing of any equipment per OSHA standards.
Pleaseobserve allsafety precautionsdisplayed on
the equipment and/or specified in the installation
manual included with the dryer.
CAUTION
Dryer(s) should never be left unattended while in
operation.
“Caution:Labelallwires priorto disconnectionwhen
servicing controls. Wiring errors can cause
improper operation.”
«Attention: Au moment de l’entretien des
commandes, étiquetez tous les fils avant de les
débrancher. Des erreurs de câblage peuvent
entraîner un fonctionnement inadéquat et
dangereux.»
WARNING
Children should not be allowed to play on or near
thedryer(s). Children should besupervised ifnear
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/screeninplace,evenifanexternallintcollection
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
inWC Inches of Water Column
L.C.D. Liquid Crystal Display
L.E.D. LightEmittingDiode
L.P. Liquid Propane
OSHA Occupational Safety and Health Administration
R.M.A. Return Material Authorization
UL Underwriters Laboratory
Table of Contents ____________________
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.
■A flexible gas connector, when used, must not exceed
3 feet.
Proposition 65
Use of this product could expose you to substances
from fuel combustion that contain chemicals
known to the State of California to cause cancer,
birth defects and other reproductive harm.
!WARNING
Safety Precautions ........................................................... 4
Specifications ................................................................... 6
Installation Procedures .................................................... 8
LocationRequirements............................................................8
Unpacking/Setting Up ............................................................8
DryerEnclosureRequirements................................................ 9
FreshAirSupplyRequirements ...............................................9
ExhaustRequirements ............................................................9
ElectricalInformation ............................................................. 12
GasInformation ..................................................................... 15
WaterInformation.................................................................. 17
PreparationforOperation/ Start-Up ...................................... 20
PreoperationalTest ............................................................... 20
PreoperationalInstructions.................................................... 21
ShutdownInstructions .......................................................... 22
Service / Parts Information ............................................ 22
Service ................................................................................. 22
Parts ..................................................................................... 22
Warranty Information ..................................................... 23
ReturningWarrantyCards..................................................... 23
Warranty............................................................................... 23
Returning WarrantyParts ...................................................... 23
Routine Maintenance ...................................................... 23
Cleaning ................................................................................ 23
Adjustments .......................................................................... 24
Lubrication ............................................................................ 24
Procedure for Functional Check
of Replacement Components ........................................ 24
Data Label Information ................................................... 26
Manual Reset Burner Hi-Limit Instructions .................. 27
Programming .................................................................. 28

4 American Dryer Corp. 113206-16
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, 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
plastic 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
areaaroundthe 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 could create a fire hazard.
For personal safety, the dryer must be electrically grounded
in accordance with local codes and/or the National Electrical
CodeANSI/NFPANO.70-LATESTEDITIONorinCanada, the
Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or
LATESTEDITION.
NOTE: Failure to electrically ground the dryer properly will
void the warranty.
Under no circumstances should the dryer door switch(es),
lint door/drawer switch(es), or heat safety circuit(s) ever be
disabled.
!WARNING
Personal injury or fire could result should the dryer
door switch, lint door/drawer, 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
thedryer.
For safety, proper operation, and optimum performance, the
dryer must not be operated with a load less than sixty-six
percent 50 lb (22 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: 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).

113206-16 www.adclaundry.com 5
NOTES _____________________________________________________
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NOTES _____________________________________________________
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____________________________________________________________
____________________________________________________________
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____________________________________________________________
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. 113206-16
MAXIMUM CAPACITY (DRY WEIGHT) 75 lb 34.02 kg
TUMBLER DIAMETER 44-1/2” 113.03 cm
TUMBLER DEPTH 24-7/8” 63.18 cm
TUMBLER VOLUME 22.40 cu ft 634.30 L
TUMBLER/DRIVE MOTOR 1 hp*0.75 kW
BLOWER/FAN MOTOR N / A*
DOOR OPENING (DIAMETER) 31-3/8” 79.69 cm
DOOR SILL HEIGHT 31” 78.74 cm
WATERCONNECTION 3/4”-11.5 NH
(North America)
3/4” B.S.P.T. (Outside North America)
DRYERS PER 20’/40’ CONTAINER 10 / 20
DRYERS PER 48’/53’ TRUCK 25 / 27
VOLTAGE AVAILABLE 120-575v 1,3ø 2,3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 888 lb 402.79 kg
APPROXIMATE SHIPPING WEIGHT 938 lb 425.47 kg
AIRFLOW 60 Hz 1,200 cfm 33.98 cmm
50 Hz 1,000 cfm 28.31 cmm
HEATINPUT 204,000 Btu/hr 51,407 kcal/hr
EXHAUST CONNECTION (DIAMETER) 10” 25.40 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 208-480v 3ø 3,4w 50/60 Hz
APPROXIMATE NET WEIGHT 888 lb 402.79 kg
APPROXIMATE SHIPPING WEIGHT 938 lb 425.47 kg
AIRFLOW 60 Hz 1,200 cfm 33.98 cmm
50 Hz 1,000 cfm 28.31 cmm
EXHAUST CONNECTION (DIAMETER) 10” 25.40 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
OVEN SIZE
kW Btu/hr kcal/hr
24 81,900 20,600
36 122,800 31,000
VOLTAGE AVAILABLE
N / A
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
STEAM CONSUMPTION
OPERATING STEAM PRESSURE
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
BOILER HORSEPOWER (NORMAL LOAD)
SUPPLYCONNECTION
RETURN CONNECTION
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 10/17/14
* For single-phase (1ø) dryers use 1 motor: 1 hp drive/fan. For 3-phase (3ø) non-reversing dryers use 1 motor: 1 hp drive/
fan and for 3-phase (3ø) reversing dryers use 2 motors: 1 hp fan and 1/2 hp drive.

113206-16 www.adclaundry.com 7
NOTE: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.
Specifications ____________________________________________________________________

8 American Dryer Corp. 113206-16
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
AmericanNationalStandards:ANSI Z223.1-LATESTEDITION
(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 (L.P. Gas) or LATEST EDITION (for General Installation
and Gas Plumbing) or Canadian Electrical Codes Parts 1 &
2 CSA C22.1-1990 or LATEST EDITION (for Electrical
Connections).
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
FuelGas CodeANSI.Z223.1 LATESTEDITION, or in Canada,
the installation must conform to applicable Canadian
Standards: CAN/CGA-B149.1-M91 (Natural Gas) or CAN/
CGA-B149.2-M91(L.P. Gas) or LATESTEDITION(forGeneral
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).
Unpacking / Setting Up ________________
Remove protective shipping material (i.e., plastic wrap and
optional shipping box) from the dryer.
IMPORTANT: The dryer must be transported and handled
in an upright position at all times.
The dryer can be moved to its final location whether attached
or detached from the skid. To remove the skid from the dryer,
locate and remove the 4 bolts securing the base of the dryer
to the wooden skid. Two are at the rear base (remove the
back panel for access), and 2 are located in the bottom of the
lintchamber. To remove the 2boltslocated in the lintchamber
area, remove the lint door.
To increase bearing life and improve efficiency, the dryer
should be tilted slightly to the rear.
If more headroom is needed when moving the dryer into
position, the top console (module) may be removed.
To Remove Top Console (Module)
Remove the 4 nuts as shown in the illustration.
Disconnect the connector in the bottom of the control box
(refer to the illustration).
Pull through all associated wires from the motor to the rear
electrical box (refer to the illustration below).
Reverse procedure for installing top section.

113206-16 www.adclaundry.com 9
A 40-inches (101.6 cm) for optimum opening of load door.
B The maximum thickness of the bulkhead is 4-inches (10.16 cm).
For electric dryers the maximum thickness of the bulkhead is
1-inch (2.54 cm) within 3-inches (7.62 cm) from the top of the
control door.
C For gas and electric dryers a minimum overhead clearance of
12-inches (30.48 cm) is required, providing no sprinkler is
located above the dryer. For steam dryers or if a sprinkler is
located above the dryer, 18-inches (45.72 cm) is required.
D Dryer should be positioned 12-inches (30.48 cm) away from
the nearest obstruction and 24-inches (60.96 cm) is
recommended for ease of installation, maintenance, and service.
E 2-inch (5.08 cm) minimum is required for opening the control
door.
F Flooring should be level or below dryer cabinet for ease of
removing panels during maintenance.
G Dryers may be positioned sidewall to sidewall, however a
1/16” (1.5875 mm) minimum allowance must be made for the
opening and closing of the control door, along with the removal
of panels during maintenance.
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 beadversely
affected. Ignition problems and sail switch “fluttering”
problems may result, as well as premature motor failure
from overheating. The dryer must be installed with provisions
for adequate combustion and make-up air supply.
Air supply (make-up air) must be given careful consideration
to ensure proper performance of each dryer. As a general
rule, an unrestricted air entrance from the outdoors
(atmosphere) of a minimum of 1-1/2 square feet (0.41 square
meters) is required for each dryer. (Based on 1 square inch
per 1,000 Btu.)
To compensate for the use of registers or louvers used over
the openings, this area 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.
A = 1-1/2 feet (0.46 meters)
B = 2 feet (0.61 meters)
EXAMPLE: For a bank of 4 dryers, 2 unrestricted openings
measuring 2 feet by 1-1/2 feet (0.61 meters by 0.46 meters)
are acceptable.
Allowances must be made for remote or constricting
passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT: Make-up air must be provided from a
source free of dry cleaning solvent fumes. Make-up air
that is contaminated by dry cleaning solvent fumes will
result in irreparable damage to the motors and other dryer
components.
NOTE: Component failure due to dry cleaning solvent
fumes will void the warranty.
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, overheating of the dryer, and
shutdown of the burner by the airflow (sail) switches, burner
hi-limits, or tumbler hi-limit 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 0.3 in WC (0.74 mb).
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.
Dryer Enclosure Requirements _______
Bulkheads and partitions should be made of noncombustible
material.
NOTE: Allowances must be made for opening the control
door.

10 American Dryer Corp. 113206-16
NOTE 1 Opening must be 2-inches (5.08 cm) larger than the duct (all the
way around). The duct must be centered within this opening.
NOTE 2 Distance should be 2 times the diameter of the duct to the nearest
obstruction.
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.
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 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.
Horizontal 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 (4.6 meters). The minimum diameter of this ductwork
must be at least 10-inches (25.4 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 (4.6
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 1 elbow should be
used in the exhaust duct run. If more than 1 elbow is 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
20 feet (6.1 meters). The minimum diameter of this ductwork
must be at least 12-inches (30.48 cm). 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 90º
turns be avoided; use 30º and/or 45º bends 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 3 elbows should be used in the
exhaust duct run. If more than 3 elbows is 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.
NOTE: As per the National Fuel Gas Code, “Exhaust ducts
for Type 2 clothes dryers shall be constructed of sheet
metal or other noncombustible material. Such ducts shall
be equivalent in strength and corrosion resistance to
ducts made of galvanized sheet steel not less than 26
gauge (0.0195-inches [0.50 mm]) thick.”
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 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: Minimum ductwork diameter for horizontal
venting is 10-inches (25.4 cm) and for vertical venting the
minimum is 12-inches (30.48 cm).

113206-16 www.adclaundry.com 11
NUMBER OF DRYERS 4 3 2 1
MINIMUM CROSS-
SECTIONAL AREA SQ IN 315 254 200 113
SQ CM 2032 1638 1290 729
MINIMUM ROUND
DUCT DIAMETER IN 20 18 16 12
CM 50 45 40 30
IMPORTANT: For extended ductwork runs, the cross-
sectional 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.
Multiple Dryer Venting with 10-inch (25.4 cm) Diameter
1,200 cfm (33.98 cmm) Exhaust Connections at Common Duct
A = 15 feet (4.6 meters)
B = 10-inches (25.4 cm)
Single Dryer Venting
Whenever 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-
sectional area is provided.
IMPORTANT: Minimum duct size for a dryer that is vented
horizontally is 10-inches (25.4 cm) for a round duct or an
equivalent of 80 square inches (516.1 square
centimeters). The duct size must not be reduced
anywhere downstream of the dryer.
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 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: Minimum duct size for a dryer that is vented
vertically is 12-inches (30.48 cm) for a round duct or an
equivalent of 113 square inches (729 square centimeters).
The duct size must not be reduced anywhere downstream
of the dryer.
SIDE VIEW
OF DRYER
(SECTION
VIEW)
SIDE VIEW
OF DRYER
(SECTION
VIEW)
NOTE 1 Opening must be 2-inches (5.08 cm) larger than the duct (all the way
around). The duct must be centered within this opening.
NOTE 2 Distance should be 2 times the diameter of the duct to the nearest
obstruction.
NOTE 1 Opening from combustible materials must be 2-inches (5.08 cm)
larger than the duct (all the way around). The duct must be centered
within this opening.
NOTE 2 Distance should be 2 times the diameter of the duct to the nearest
obstruction.
C = 20 feet (6.1 meters)
D = 12-inches (30.48 cm)

12 American Dryer Corp. 113206-16
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, which could
cause 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.
An individual ground circuit must be provided to each
dryer, do not daisy chain.
IMPORTANT: A separate protected circuit must be
provided to each dryer.
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. 208 VAC and
230/240 VAC are not the same.
The wire size must be properly sized to handle the related
current.
ELECTRICAL SERVICE SPECIFICATIONS (PER POCKET)
IMPORTANT:
NOTES:A.
B.
C.
208 VAC and 230/240 VAC ARE NOT THE SAME. Whenordering,
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 MODELS
120 1ø 2 13 — 20
208 1ø 2 7.6 — 15
220 1ø 2 6.3 — 15
230 1ø 2 — 8 15
240 1ø 2 7 — 15
208 3ø 3 4.7 — 15
220 / 240 3ø 3 4.9 — 15
460-480 3ø 3 2.8 — 15
REVERSING MODELS
208 3ø 3 6.7 — 15
240 3ø 3 7.1 — 15
460-480 3ø 3 3.9 — 15
575 3ø 3 3.3 — 15
Check your local code for breaker and wire size 2/7/15
NOTES ________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________
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 Models Only

113206-16 www.adclaundry.com 13
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 CodeANSI/NFPANO.
70-LATEST EDITION, or in Canada, the installation must
conformto applicable CanadaStandards: 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 (size per local codes) 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 a wire (size per local codes) 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 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
dryersare made into the rear service box,located at the upper
left area of the dryer.
Check your local code for breaker and wire size 2/7/15
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.
ELECTRICAL SERVICE SPECIFICATIONS (PER POCKET)
IMPORTANT:
NOTES:A.
B.
C.
208 VAC AND 230/240 VAC ARE NOT THE SAME. Whenordering,
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
208 3ø 3 30 91 —125
208 3ø 3 27 83 —125
208 3ø 3 24 71 —90
208 3ø 3 30 88 —125
480 3ø 3 30 39 —50
208 3ø 3 36 105 —150
220 3ø 3 30 84 —125
240 3ø 3 36 92 —125
460 3ø 3 33 44 —60
480 3ø 3 36 46 46 60
208 3ø 3 27 80 —125
440 3ø 3 23 33 —50
460 3ø 3 25 34 —50
480 3ø 3 27 35 —50
480 3ø 4 or 3 30 —39 50
230 3ø 3 33 —88 125
380 3ø 4 or 3 30 —48 70
400 3ø 4 or 3 33 —51 70
416 3ø 4 or 3 36 —53 70
208 3ø 3 27 80 —125
240 3ø 3 21 55 —75
480 3ø 3 21 28 —40
REVERSING
208 3ø 3 24 73 —100
208 3ø 3 30 90 —125
480 3ø 3 30 40 —50
208 3ø 3 36 107 —150
220 3ø 3 30 86 —125
240 3ø 3 36 94 —125
460 3ø 3 33 45 —60
480 3ø 3 36 47 —60
208 3ø 3 27 82 —125
440 3ø 3 23 34 —50
460 3ø 3 25 35 —50
480 3ø 3 27 36 —50
480 3ø 4 or 3 30 —41 60
230 3ø 3 33 —90 125
380 3ø 4 or 3 30 —50 70
400 3ø 4 or 3 33 —53 70
416 3ø 4 or 3 36 —55 70
480 3ø 3 36 —48 70
208 3ø 3 27 82 —125
240 3ø 3 21 58 —75
480 3ø 3 21 29 —50

14 American Dryer Corp. 113206-16
For 110V Applications
Single-Phase Electrical Lead Connections
Black
+
Positive
White or Red
+
Neutral
or L2
Green
+
Ground
For 208-240V Applications
A ground lug is provided in the rear electrical box to connect
your service ground.
3-Phase (3ø) Wiring Connections / Hookup
The electrical connections on all 3-phase (3ø) gas 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.
The neutral will only be used on 4-wire service. This is typical
for 380-416V, 50 Hz.

113206-16 www.adclaundry.com 15
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 CodeANSI Z223.1-LATEST EDITION, or in Canada, the
Canadian Installation Codes CAN/CGA-B149.1-M91 (Natural
Gas)orCAN/CGA-B149.2-M91(L.P.Gas)orLATESTEDITION.
InAustralia, the fuel gas code isAS/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 the dryer
from supply as noted can cause irreparable damage to
the gas valve, voiding the warranty.
!WARNING
Fireorexplosioncouldresultduetofailureofisolating
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 (L.P. 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 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 the manufacturer.
IMPORTANT: Any burner changes or conversions must
be made by a qualified professional.
The input ratings shown on the 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 the manufacturer.
Electrically Heated Models Only
The electrical input connections are made at the electric oven
contactor,locatedinsidethe assembly at therear 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.
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
doneinternallytothe dryer by the factoryattheoven 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.
IMPORTANT: A strain relief must be used where the input
wiring enters the oven assembly.

16 American Dryer Corp. 113206-16
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
Liquid
Propane
10.5 in WC 11.0 in WC
26.1 mb 27.4 mb
TYPE OF GAS
Btu/hr
Rating kcal/hr
Rating Natural Liquid Propane
Qty. D.M.S.* Part No. Qty. D.M.S.* Part No.
204,000 51,408 3 #23 140856 3 #42 140810
Liquid Propane Conversion Kit Part Number 881655
Shaded area is stated in metric equivalent
* D.M.S. equivalents are as follows:
Natural Gas ............... #23 = 0.1540” (3.9116 mm).
L.P. Gas ..................... #42 = 0.0935” (2.3749 mm).
Shaded areas are stated in metric equivalents
* Measured at gas valve pressure tap when the gas valve is on.
Gas Connections
Inlet connection ............3/4” N.P.T.
Inlet supply size ...........3/4” Diameter Pipe (minimum)
Heat input (per dryer) ...204,000 Btu/hr (51,408 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.
L.P. Gas
Dryers made for use with L.P. 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 an L.P. dryer. The water column
pressure must be regulated at the source (L.P. tank) or an
external regulator must be added to each dryer.
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 (L.P. 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.
The dryer is provided with a 3/4” N.P.T. inlet pipe connection,
located at the upper left rear of the dryer. The minimum pipe
size (supply line) to the dryer is 3/4” diameter. 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 L.P. gas, the supply tank, or 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.
TYPICALNATURALGASINSTALLATION
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.
TYPICALL.P.GASINSTALLATION
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

113206-16 www.adclaundry.com 17
Typical Water Supply
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 L.P.
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 L.P. 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!!!
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).
Water Information ____________________
Before You Start
Check Local Codes and Permits
Call your local water company or the proper municipal
authority for information regarding local codes.
IMPORTANT: It is your responsibility to have all plumbing
connections made by a qualified professional to ensure
that the plumbing installation is adequate and conforms to
local, state, and federal regulations or codes.
It is the installer’s or owner’s responsibility to see that the
required water pressure, pipe size, or connections are
provided. The manufacturer assumes no responsibility if
the fire suppression system is not connected, installed, or
maintained properly.
Installation
Water Supply
The fire suppression system must be supplied with a
minimum water pipe size of 1/2-inch and be provided with 40
psi +/- 20 psi (2.75 bar +/- 1.37 bar) of pressure. For use of
optional manual bypass, a second source with the same
piping and pressure requirements is required.
Flexible 1/2 feeds must be provided to avoid damage to
electric water solenoid valve by vibration.
IMPORTANT: Flexible supply line/coupling must be used.
Solenoid valve failure due to hard plumbing connections
will void warranty.
If the rear area of the dryer or the water supply is located
in an area where it will be exposed to cold/freezing
temperatures, provisions must be made to protect these
water lines from freezing.
!WARNING
If the water in the supply line or water solenoid
valve freezes, the fire suppression system will be
inoperative!!
IMPORTANT: The dryer is to be connected to the water
mains using a new hose set and the old hose set should
not be reused.
Water Connections
The water connection is made to the 3/4”-11.5 NH hose
adaptor, located at the rear upper midsection of the dryer.
The water solenoid valve has a 3/8” M.P.T. connection
supplied with a 3/4”-11.5 NH hose adaptor to provide the
minimum 1/2-inch supply (feed) line. Flexible supply line/
coupling must be used in an effort to avoid damaging the
electric water solenoid valve.
NOTE: The 3/4”-11.5 NH is a standard hose coupling
screw thread. It is not to be confused with 3/4” N.P.T. The
sealing of an NH connection is made with a washer
opposed to the mating threads of an N.P.T. assembly. The
2 thread designs are not compatible.

18 American Dryer Corp. 113206-16
IMPORTANT: Flexible supply line/coupling must be used.
Solenoid valve failure due to hard plumbing connections
will void warranty. It is recommended that a filter or
strainer be installed in the water supply line.
Optional Manual Bypass
Provisions are made in the dryer’s fire suppression system
for the installation of an optional manual bypass. Depending
on the model dryer, the connections for the manual bypass
are made at the “T” or “three way” fitting, located in the outlet
supply side of the water solenoid valve. The use and
connections of this manual bypass are at the option or
discretion of the owner.
The water connection for the manual bypass is made to the
“T”or “three way”fitting, which has a3/8” F.P.T. and acoupling
must be used to provide the minimum 1/2-inch supply (feed)
line.
If the rear area of the dryer or the water supply is located
in an area where it will be exposed to cold/freezing
temperatures, provisions must be made to protect these
water lines from freezing.
!WARNING
If the water in the supply line or water solenoid valve
freezes, the fire suppression system will be
inoperative!!
The manual ball cock shutoff valve must be located outside
of the dryer at a distance from the dryer where it is easily
accessible.
Electrical Requirements
No independent external power source or supply connection
is necessary. The 24-volt power to operate the fire
suppression system is accomplished internally in the dryer
(from the dryer controls).
!WARNING
Electrical power must be provided to the dryer at all
times. If the main electrical power supply to the dryer
is disconnected, the fire suppression system is
inoperative!!
!WARNING
ELECTRICAL SHOCK HAZARD
Electrical shock hazard can result in serious injury.
If the water dispensing system is activated do not
attempt to operate the dryer.
If the water dispensing system is activated have the
dryer inspected by a qualified agency before operating
the dryer.
Fire Suppression System
Theory of Operation
While the dryer is in an idle state, or 20-seconds after the
heat turns off, the Phase 7 microprocessor controller
(computer) monitors the thermistor probe, located in the top
of the tumbler chamber, and records the minimum
temperature. If the minimum recorded thermistor probe
temperature is greater than 120° F (48° C) and the Phase 7
microprocessor controller (computer) detects a 50° rise in
temperature, this will be the trip point and the fire suppression
system routine will activate.
While a drying cycle is in process and the heat has turned on
at least once, the Phase 7 microprocessor controller
(computer) monitors the exhaust temperature transducer. If
the drying cycle temperature set point is set greater than
160° F (71° C) and the Phase 7 microprocessor controller
(computer) detects an exhaust temperature rise 25° F greater
than set point, this will be the trip point and the fire
suppression system routine will activate. If set point is below
160° F (71° C), the trip point will be 185° F (85° C).
Once the fire suppression system routine is activated, the
Phase 7 microprocessor controller (computer) will display
“S.A.F.E.SYSTEMACTIVATED” and water willbeinjectedinto
the tumbler chamber. Any time water is being injected into
the tumbler, the tumbler drive will turn the load for
1-second every 15-seconds. This process will continue for
a minimum of 2 minutes. After the 2 minutes have elapsed,
the Phase 7 microprocessor controller (computer) will check
if the temperature remained above trip point; if so, the water
will remain on. The Phase 7 microprocessor controller
(computer) will continue to check if the temperature is above
trip point every 30-seconds. If the water has been on for a
constant 10 minutes, the water will be turned off, regardless
of the temperature, and the Phase 7 microprocessor
controller (computer) will display “S.A.F.E. SYSTEM WAS
ACTIVATED”. If the temperature hasdropped below trip point,
the Phase 7 microprocessor controller (computer) will turn
off the water prior to 10 minutes.
System Reset
After the Phase 7 microprocessor controller (computer)
determines that the situation is under control and shuts the
water being injected into the tumbler off, the Phase 7
microprocessor controller (computer) display will read,
“S.A.F.E. SYSTEM WASACTIVATED”, and the horn/tone will
sound until reset manually.
Non-Coin – To reset the Phase 7 microprocessor controller
(computer) once the Phase 7 microprocessor controller
(computer) displays, “S.A.F.E. SYSTEM WAS ACTIVATED”,
press the red “STOP/CLEAR” key on the keypad.
Coin –To reset the Phase 7 microprocessor controller
(computer) once the Phase 7 microprocessor controller
(computer) displays, “S.A.F.E. SYSTEM WAS ACTIVATED”,
press and hold the red “PAUSE” key for 3-seconds on the
keypad.
Fire Suppression System
Water Valve Check
The operation of the water solenoid valve can be tested to
ensure that the water supply system and valve are functional.
Before attempting a system check, be sure that all water
supply shutoff valves to the dryer are in the OPEN position,
the dryer must be in the “READY” Mode with no cycle loaded
or in progress.

113206-16 www.adclaundry.com 19
Fire Suppression System Diagnostics
Non-Coin – In the event that the Phase 7 non-coin
microprocessor controller (computer) detects a fault in the
fire suppression system, the Phase 7 non-coin
microprocessor controller (computer) will display the
message, “S.A.F.E. SYSTEM DISABLED…READY”. To find
out why the fire suppression system is disabling, press and
hold the red “STOP/CLEAR” and green “START” keys. This
will cause the Phase 7 microprocessor controller (computer)
to display a diagnostic message, as detailed in the “S.A.F.E.
SYSTEMDIAGNOSTICSMESSAGES”section.
Coin – In the event that the Phase 7 coin microprocessor
controller (computer) detects a fault in the fire suppression
system, the Phase 7 microprocessor controller (computer)
will display the message, “S.A.F.E. SYSTEM DISABLED…
READY, INSERT XX TO START.”. To find out the reason for
the fire suppression system disabling, press and hold the
red “PAUSE” and “LOW” keys. This will cause the Phase 7
microprocessor controller (computer) to display a diagnostic
message, as detailed in the following section.
Fire Suppression System
Diagnostics Messages
Open Thermistor Probe – This message indicates that
the fire suppression system thermistor probe either is not
connected or is damaged. If this condition is detected, the
Phase 7 microprocessor controller (computer) will
immediately enter “S.A.F.E. SYSTEM DISABLED” Mode.
Non-Coin
Pressand hold the red“STOP/CLEAR” key (whilein “READY”
Mode and no cycle is in progress).
Press and hold the “A” key.
Water valve will open and water will be dispensed into
tumbler area as long as both keys are held.
The Phase 7 non-coin microprocessor controller (computer)
will prompt the user to perform a fire suppression system
valvecheckat every 4000 hours toensureproper functionality.
At the 4000 hour mark, the Phase 7 microprocessor controller
(computer) will wait for end of the cycle and then will prompt
the user to “PLEASE EMPTY TUMBLER, THEN PRESS THE
‘STOP/CLEAR’AND‘A’KEYSTOTESTTHEWATERVALVE”.
When the “STOP/CLEAR” and “A” keys are pressed, the
Phase 7 microprocessor controller (computer) will activate
the fire suppression system water valve for 2-seconds, at
which point the Phase 7 microprocessor controller
(computer) will prompt the user with the following message,
“IFWATERDIDNOTTURNON,CALLFORSERVICE. THANK
YOU.”.
NOTE: The Phase 7 microprocessor controller (computer)
will not let the user continue until the valve test has been
completed.
Coin
While the Phase 7 microprocessor controller (computer) is
in the Program Mode, press and hold the “PAUSE” key for
3-seconds to get into the Valve Test Mode. The Phase 7
microprocessor controller (computer) will display, “PRESS
AND HOLD MEDIUM TO OPEN WATER VALVE”. When the
medium key is pressed, the Phase 7 microprocessor
controller (computer) will activate the water output.

20 American Dryer Corp. 113206-16
Shorted Thermistor Probe – This message indicates
that the fire suppression system thermistor probe is
damaged or the wiring is shorted. If this condition is detected,
the Phase 7 microprocessor controller (computer) will
immediately enter “S.A.F.E. SYSTEM DISABLED” Mode.
Disconnected Water Valve – This message indicates
that the water valve is open or that it is not connected to the
Phase 7 microprocessor controller (computer). If this
condition is detected, the Phase 7 microprocessor controller
(computer) will continue to monitor the condition for a period
of 5 minutes before entering “S.A.F.E. SYSTEM DISABLED”
Mode. Once the condition is corrected, the Phase 7
microprocessor controller (computer) will continue to monitor
the condition for 1 minute before exiting “S.A.F.E. SYSTEM
DISABLED”Mode.
Shorted Water Valve – This message indicates that the
watervalve is shorted or that the wiring to the valve is shorted.
If this condition is detected, the Phase 7 microprocessor
controller (computer) will continue to monitor the condition
for a period of 5 minutes before entering “S.A.F.E. SYSTEM
DISABLED”Mode. Oncethe condition is corrected, thePhase
7 microprocessor controller (computer) will continue to
monitor the condition for 1 minute before exiting “S.A.F.E.
SYSTEMDISABLED”Mode.
Water Not Connected – This indicates that there is no
water pressure at the water valve. This will occur if water is
not connected to the dryer, or if there is low water pressure in
the water line coming to the dryer. This could also signify a
defective pressure switch or defective wiring to the pressure
switch. If this condition is detected, the Phase 7
microprocessor controller (computer) will continue to monitor
theconditionforaperiod of 5 minutes before entering “S.A.F.E.
SYSTEMDISABLED” Mode. Once the condition iscorrected,
the Phase 7 microprocessor controller (computer) will
continue to monitor the condition for 1 minute before exiting
“S.A.F.E. SYSTEM DISABLED” Mode.
Starting A Cycle: When Phase 7
Microprocessor Controller (Computer) is
in “S.A.F.E. SYSTEM IS DISABLED” Mode
Non-Coin – When the fire suppression system is disabled,
the user can still start a cycle. However, when a cycle is
started, the Phase 7 microprocessor controller (computer)
will display the following message, “S.A.F.E. SYSTEM IS
DISABLED. PRESS ‘START’TOCONTINUE”. Thismessage
will be displayed every time a cycle is started, until the
disabling condition has been corrected.
Coin – When the fire suppression system is disabled, the
user can still start a cycle. Simply insert credit and select a
cycle to start.
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 data label. In the case of 208
VAC or 230/240 VAC, the supply voltage must match the
electric service exactly.
• GAS MODELS – Check to ensure that the dryer is
connected to the type of heat/gas indicated on the dryer
data label.
• GAS 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.
• GAS MODELS – Be sure that all gas shutoff valves are
in the open position.
• Be sure all back panels (guards) and electric box
covers have been replaced.
• Check all service doors to ensure that they are closed
and secured in place.
• Be sure the lint door/drawer is securely in place.
• Rotate the tumbler by hand to ensure that it moves
freely.
• Check bolts, nuts, screws, terminals, and fittings for
security.
• Check tumbler bearing setscrews to ensure they are all
tight.
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.
Turnon electric power to the dryer andopen all shutoff valves.
Refer to the Operating Instructions for starting your particular
model dryer.
Gas Dryers
When a gas dryer is first started (during initial start-up), the
burnerhas a tendency notto ignite on thefirst ignition attempt.
Because the gas supply piping is filled with air, it may take a
few minutes for the air to be purged from the lines.
NOTE: During the purging period, check to ensure that all
gas shutoff valves are open.
Gas dryers are equipped with a DSI system, which has
internal diagnostics. If ignition is not established within 3
tries, the heat circuit in the DSI module will “lockout” until it is
manually reset. To reset the DSI 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 gas valve pressure tap): Natural Gas: 3.5 in WC (8.7
mb); L.P. Gas: 10.5 in WC (26.1 mb).
IMPORTANT: There is no regulator provided in an L.P.
dryer. The water column pressure must be regulated at
the source (L.P. 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
• Sail Switch