ADC AD-50 User manual

AD-50 / AD-50DR
Installation Manual
Phase 5 / Dual Timer
ADC Part No. 113066-17
AVERTISSEMENT:
RISQUE D’INCENDIE OU D’EXPLOSION
Le non-respect des avertissements de
sécurité pourrait entraîner des blessures
graves, la mort ou des dommages
matériels.
–N’entreposer pas et n’utilisez pas
d’essence ni d’autres vapeurs ou
liquides inflammables dans le voisinage
de cet appareil ou de tout autre appareil.
–QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ
●●
●●
●Ne tentez pas d’allumer d’appareil.
●●
●●
●Ne touchez à aucun interrupteur. Ne
vous servez pas des téléphones se
trouvant dans le bâtiment où vous
vous trouvez.
●●
●●
●Évacuez la pièce, le bâtiment ou la zone.
●●
●●
●Appelez immédiatement votre
fournisseur de gaz depuis un voisin.
Suivez les instructions du fournisseur.
●●
●●
●Si vous ne pouvez rejoindre le
fournisseur de gaz, appelez le service
des incendies.
– L’installation et l’entretien doivent être
assurés par un installateur ou un service
d’entretien qualifié ou par le fournisseur
de gaz.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death or
property damage.
– Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
●●
●●
●Do not try to light any appliances.
●●
●●
●Do not touch any electrical switch;
do not use any phone in your
building.
●●
●●
●Clear the room, building or area of
all occupants.
●●
●●
●Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
●●
●●
●If you cannot reach your gas
supplier, call the fire department.
– Installation and service must be
performed by a qualified installer, service
agency or the gas supplier.
!!
!!
!!!
!!
!
American Dryer Corporation
88CurrantRoad,FallRiverMA02720-4781USA
Telephone:[phone]/ Fax: [phone]
e-mail:[email protected]/www.adclaundry.com

Retain This Manual In ASafe Place For Future Reference
American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is
properly maintained, it will provide many years of safe, efficient, and trouble-free operation.
ONLY qualified technicians should service this equipment.
OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation manual included with
the dryer.
The following “FOR YOUR SAFETY CAUTION” must be posted near the dryer in a prominent location.
We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the right to make
changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change or
discontinue models. The illustrations included in this manual may not depict your particular dryer exactly.
Important
For your convenience, log the following information:
DATEOFPURCHASE____________________________________________________________ MODELNO. ______________
RESELLER’SNAME ________________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement parts from the factory,
youcan FAX yourorder toADCat+1(508) 678-9447ortelephone yourorderdirectly totheADCParts Department at+1(269)
923-3000. Pleasespecify thedryer modelnumberand serial numberinaddition tothedescriptionand partnumber,sothat
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
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.
“IMPORTANTNOTETOPURCHASER”
Informationmustbe obtainedfrom yourlocal gas supplieron
the instructions to be followed if the user smells gas. These
instructionsmustbepostedinaprominentlocationnearthedryer.

IMPORTANT
YOUMUSTDISCONNECTANDLOCKOUTTHEELECTRICSUPPLYANDTHEGAS
SUPPLYOR THE STEAM SUPPLYBEFORE ANY COVERS OR GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, OR TESTING OFANY EQUIPMENT PER OSHA
(OccupationalSafety andHealthAdministration)STANDARDS.
WARNING
CHILDRENSHOULDNOTBEALLOWEDTOPLAYONORNEARTHEDRYER(S).
CHILDRENSHOULDBESUPERVISEDIFNEARDRYERSINOPERATION.
CAUTION
DRYERSSHOULDNEVERBELEFTUNATTENDEDWHILEINOPERATION.
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
erreursde câblagepeuvententraînerunfonctionnement
inadéquat.
IntheStateofMassachusetts,the following installationinstructionsapply:
■Installationsandrepairsmustbeperformedbyaqualifiedorlicensedcontractor,plumber,
orgas fitter qualifiedor licensed bythe Stateof Massachusetts.
■AcceptableShut-offDevices:GasCocksandBall Valvesinstalledforuseshallbelisted.
■Aflexiblegasconnector, whenused,mustnot exceed 4feet(121.9 cm).
FORYOURSAFETY
DONOTDRYMOPHEADSIN THEDRYER.
DONOTUSEDRYERINTHEPRESENCEOFDRYCLEANINGFUMES.

WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panelsremoved. PERSONALINJURYORFIRECOULDRESULT.
IMPORTANT
PLEASEOBSERVEALLSAFETYPRECAUTIONSdisplayedontheequipmentand/or
specified in the installation manual included with the dryer.
WARNING
DRYER MUSTNEVERBEOPERATEDWITHOUTTHELINTFILTER/SCREENIN
PLACE,EVENIFANEXTERNALLINTCOLLECTIONSYSTEMISUSED.
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.
WARNING
UNDER NO CIRCUMSTANCES should the dryer door switch or the heat circuit
devices ever be disabled.
WARNING
DONOTMODIFYTHISAPPLIANCE.
WARNING
If the hi-limit switch trips, a service call is required to investigate the reason and
resolve the issue.

Table of Contents
SECTION I
IMPORTANT INFORMATION............................................................................... 3
A. ReceivingandHandling ............................................................................................................... 3
B. SafetyPrecautions ...................................................................................................................... 4
SECTION II
SPECIFICATIONS ....................................................................................................7
A. Specifications ............................................................................................................................. 7
SECTION III
INSTALLATION PROCEDURES ...........................................................................9
A. Unpacking/SettingUp ................................................................................................................. 9
B. LocationRequirements ............................................................................................................. 10
C. DryerEnclosureRequirements .................................................................................................. 11
D. FreshAirSupplyRequirements ................................................................................................. 12
E. ExhaustRequirements ............................................................................................................... 13
F. ElectricalInformation ................................................................................................................ 18
G. GasInformation ........................................................................................................................ 26
H. SteamInformation .................................................................................................................... 30
I. PreparationForOperation/Start-Up ......................................................................................... 35
J. PreoperationalTest ................................................................................................................... 36
K. PreoperationalInstructions ........................................................................................................ 37
L. ShutDownInstructions ............................................................................................................. 40
SECTION IV
SERVICE/PARTS INFORMATION......................................................................41
A. Service ..................................................................................................................................... 41
B. Parts ........................................................................................................................................ 41
SECTION V
WARRANTY INFORMATION ..............................................................................42
A. ReturningWarrantyCards......................................................................................................... 42
B. Warranty .................................................................................................................................. 42
C. ReturningWarrantyParts .......................................................................................................... 42

SECTION VI
ROUTINE MAINTENANCE..................................................................................44
A. Cleaning ................................................................................................................................... 44
B. Adjustments ............................................................................................................................. 45
C. Lubrication ............................................................................................................................... 45
SECTION VII
TROUBLESHOOTING...........................................................................................46
MicroprocessorController(Computer)Models .............................................................................. 46
DualTimerModels ......................................................................................................................... 52
SECTION VIII
DATA LABEL INFORMATION.............................................................................55
SECTION IX
REVERSING TIMER SPIN/DWELL ADJUSTMENTS ....................................56
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK
OF REPLACEMENT COMPONENTS................................................................57
SECTION XI
BURNER AND TUMBLER/LINT CHAMBER
MANUAL RESET HI-LIMIT INSTRUCTIONS .................................................60
GasModelsOnly ........................................................................................................................... 60
ElectricorSteamModelsOnly ....................................................................................................... 61

113066 - 17 www.adclaundry.com 3
SECTIONI
IMPORTANTINFORMATION
A. RECEIVINGAND HANDLING
The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover (or
optional box) as a means of preventing damage in transit. Upon delivery, the dryer and packaging, and wooden
skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect further
before delivering carrier leaves.
Dryers damaged in shipment:
1. ALL dryers should be inspected upon receipt and before they are signed for.
2. If there is suspected damage or actual damage, the trucker’s receipt should be so noted.
3. If the dryer is damaged beyond repair, it should be refused. Those dryers, which were not damaged in a
damaged shipment, should be accepted, but the number received and the number refused must be noted
on the receipt.
4. If you determine that the dryer was damaged after the trucker has left your location, you should call the
delivering carrier’s freight terminal immediately and file a claim. The freight company considers this
concealed damage. This type of freight claim is very difficult to get paid and becomes extremely difficult
when more than a day or two passes after the freight was delivered. It is your responsibility to file freight
claims. Dryer/parts damaged in transit cannot be claimed under warranty.
5. Freight claims are the responsibility of the consignee, andALL claims must be filed at the receiving end.
ADC assumes no responsibility for freight claims or damages.
6. If you need assistance in handling the situation, please contact the ADC Traffic Manager at +1 (269)
923-3000.
IMPORTANT: Thedryermustbe transportedandhandledinanupright position at ALLtimes.

4 American Dryer Corp. 113066 - 17
B. SAFETY PRECAUTIONS
WARNING: Foryoursafety, theinformationinthismanualmustbefollowedto minimizetheriskof
fireorexplosionorto prevent property damage,personalinjury, or loss oflife.
WARNING: Thedryer must neverbe operated withany ofthe back guards,outer tops,or
servicepanels removed. PERSONALINJURYORFIRE COULDRESULT.
1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
2. DO NOT spray aerosols in the vicinity of this appliance while it is in operation.
3. Purchaser/user should consult the local gas supplier for proper instructions to be followed in the event the
user smells gas. The instructions should be posted in a prominent location.
4. WHAT TO DO IF YOU SMELL GAS...
a. DO NOT try to light any appliance.
b. DO NOT touch any electrical switch.
c. DO NOT use any phone in your building.
d. Clear the room, building, or area of ALLoccupants.
e. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
f. If you cannot reach your gas supplier, call the fire department.
5. Installation and service must be performed by a qualified installer, service agency, or gas supplier.
6. Dryer(s) must be exhausted to the outdoors.
7. Although ADC produces a very versatile dryer, there are some articles that, due to fabric composition or
cleaning method, should not be dried in it.
WARNING: Dryonly waterwashed fabrics. DO NOTdry articlesspotted or washedin dry
cleaningsolvents,a combustibledetergent,industrialchemicals, or“allpurpose”cleaner.
EXPLOSIONCOULDRESULT.
WARNING: DONOTdry ragsorarticles coated orcontaminatedwith gasoline, kerosene,oil,paint,
orwax. EXPLOSION COULDRESULT.
WARNING: DONOTdrymop heads. Contamination bywaxorflammable solvents will createa
firehazard.
WARNING: DONOTuse heatfordrying articles thatcontainplastic,foam, sponge rubber,or
similarlytexturedrubbermaterials. Dryingina heatedtumblermaydamageplasticsor
rubberand may beafire hazard.

113066 - 17 www.adclaundry.com 5
8. The possible presence of residual quantities of aggressive or decomposed chemicals in the load may produce
damage to the machine and harmful fumes.
9. 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: Thecollectionoflintinthe burner area and exhaustductworkcancreateapotentialfire
hazard.
10. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or National
Electric Code ANSI/NFPA 70, or in Canada, Canadian Electric Code CSA C22.1.
NOTE: Failuretodo so willVOIDTHEWARRANTY.
11. UNDER NO CIRCUMSTANCES should the dryer door switch or the heat safety circuit devices ever
be disabled.
WARNING: PERSONALINJURYORFIRECOULDRESULT.
12. This dryer is not to be used in the presence of dry cleaning solvents or fumes.
13. Remove articles from the dryer as soon as the drying cycle has been completed.
WARNING: Articlesleftinthedryerafterthedryingandcoolingcycleshavebeencompletedcan
createa fire hazard.
14. DO NOT operate steam dryers with more than 125 PSI (8.62 bars) steam pressure. Excessive steam
pressure can damage steam coil and/or harm personnel.
15. Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with
leaking flexible hoses. PERSONAL INJURY MAY RESULT.
16. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE
DRYER.
17. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%), 33 lb (15 kg) of its rated capacity.
WARNING: YOUMUSTDISCONNECTAND LOCKOUTTHEELECTRIC SUPPLYAND
THEGASSUPPLYORTHESTEAM SUPPLYBEFOREANYCOVERS OR
GUARDSAREREMOVED FROMTHEMACHINETOALLOWACCESS
FORCLEANING,ADJUSTING,INSTALLATION,ORTESTINGOFANY
EQUIPMENTPEROSHA(OccupationalSafetyandHealthAdministration)
STANDARDS.

6 American Dryer Corp. 113066 - 17
CE ONLY
IMPORTANT: Thisappliance mustonlybeinstalledand operated inthecountryofdestination
indicatedon the dryer’sdata plate. If theapplianceis to beinstalledand operatedina
countryother than theoneindicated on thedataplate, a dataplateamendment must
beobtainedfromAmericanDryerCorporation.
IEC335 applies.
NOTES ____________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________

113066 - 17 www.adclaundry.com 7
MAXIMUM CAPACITY (DRY WEIGHT) 50 lb 22.68 kg
TUMBLER DIAMETER 32 3/4” 83.19 cm
TUMBLER DEPTH 37 1/2” 95.25 cm
TUMBLER VOLUME 18.30 cu ft 518.20 L
TUMBLER/DRIVE MOTOR 3/4 hp 0.56 kW
BLOWER/FAN MOTOR N / A
DOOR OPENING (DIAMETER) 21 1/2” 54.61 cm
DOOR SILL HEIGHT N / A
WATER CONNECTION 3/4”-11.5 NH
DRYERS PER 20’/40’ CONTAINER 10 / 20
DRYERS PER 48’/53’ TRUCK 26 / 28
VOLTAGE AVAILABLE 120-460V 1,3ø 2,3w 60 Hz
APPROXIMATE NET WEIGHT 635 lb 288.03 kg
APPROXIMATE SHIPPING WEIGHT 680 lb 308.44 kg
AIRFLOW 60 Hz 600 cfm 16.99 cmm
HEAT INPUT 150,000 Btu/hr 37,799 kcal/hr
EXHAUST C ONNECTION (DIAMETER) 8 ” 20.32 cm
COMPRESSED AIR CONNECTION N / A
COMPRESSED AIR VOLUME N / A
INLET PIPE CONNECTION 1/2” M.N.P.T.
VOLTAGE AVAILABLE 208-480V 3ø 3w 60 Hz
APPROXIMATE NET WEIGHT
N / A
APPROXIMATE SHIPPING WEIGHT
AIRFLOW 60 Hz
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
OVEN SIZE
kW Btu/hr kcal/hr
24 81,900 20,638
30 102,390 25,802
VOLTAGE AVAILABLE 120-460V 1,3ø 2,3w 60 Hz
APPROXIMATE NET WEIGHT 667 lb 302.55 kg
APPROXIMATE SHIPPING WEIGHT 710 lb 322.05 kg
AIRFLOW 60 Hz 600 cfm 16.99 cmm
STEAM CONSUMPTION 1 4 2 lb /hr 64.41 kg/hr
OPERATING STEAM PRESSURE 125 psi max 8.62 bar
EXHAUST C ONNECTION (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) 4.1 Bhp
SUPPLY CONNECTION 1” F.N.P.T.
RETURN CONNECTION 1 ” F.N.P.T.
SECTIONII
SPECIFICATIONS
A. SPECIFICATIONS
NOTE: ADCreserves the right to make changes in specifications at any time without notice or
obligation.
GAS
Shaded areas are stated in metric equivalents 2/24/22
ELECTRICSTEAM

8American Dryer Corp. 113066-17
SPECIFICATIONS
NOTE: ADCreservestherighttomakechangesinspecificationsatanytimewithoutnoticeor
obligation.

113066-17 www.adclaundry.com 9
SECTIONIII
INSTALLATIONPROCEDURES
Installation should be performed by competent professional in accordance with local, state, and country codes.
In the absence of these codes, the installation mustconformto applicableAmerican National Standards: National
Fuel Gas CodeANSI Z223.1/NFPA54 and National Electric CodeANSI/NFPA70, or in Canada, the installation
must conform to applicable Canadian Standards: Natural Gas and Propane Installation Code CSA B149.1 and
Canadian Electric Code CSA C22.1.
A. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.
IMPORTANT:Dryermustbetransportedandhandled in an upright positionatALLtimes.
NOTE: ForOPL dryer modelsequippedwith locks, thelock used isadummy lock andnokey is
suppliedor needed. The lockcanbe turned withanykey,a screwdriver, asmallcoin, or any
smallsharp object. Forcoin-operated dryers, theMK-100 (master keyfor boththe control
doorand lintdoor) shouldbemade accessiblebecause itwill beneededthroughoutvarious
phasesintheinstallationofthedryer.
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 (4) bolts securing the base of the dryer to the wooden skid. Two (2) are
located at the rear base (remove the back panel for access), and two (2) are located at the bottom of the lint
chamber. To remove the two (2) bolts located in the lint chamber area, remove the lint door.
With the skid removed, to make it easier to slide the dryer into its final position, slightly lower ALL four (4)
leveling legs, so that the dryer will slide on the legs instead of the base frame.
To increase bearing life and improve efficiency, the dryer should be tilted slightly to the rear.
The tumbler of some 50 Hz model dryers is supported during shipping by a wooden block. REMOVE THIS
BLOCK BEFORE STARTING THE DRYER.
IMPORTANT:Formicroprocessorcontroller (computer) models,thiswoodenblock mustbe
removed before connectingpowertothedryeror irreparable damage tothetumbler
willresult.
The lint coops of ALL model dryers are supported during shipping by a bracket. REMOVE THIS BRACKET
BEFORE STARTING THE DRYER.

10 American Dryer Corp. 113066-17
1. Leveling Dryer
The dryer is equipped with four (4) leveling legs, one (1) at each corner of the base. Two (2) are located
at the rear of the dryer base, and two (2) are located in the lint chamber (coop). To increase bearing life
and improve efficiency, the dryer should be tilted slightly to the rear.
B. LOCATION REQUIREMENTS
Before installing the dryer, ensure the location conforms to local codes and ordinances. In the absence of such
codes or ordinances the location must conform with National Fuel Gas Code ANSI Z223.1/NFPA54, or in
Canada, the installation must conform to applicable Canadian Standards: Natural Gas and Propane Installation
Code CSA B149.1.
1. The dryer must be installed on a sound level floor capable of supporting its weight. Carpeting must be
removed from the floor area that the dryer is to rest on.
IMPORTANT:“Thedryermustbeinstalledonnoncombustiblefloorsonly.”
2. The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.
3. The dryer is for use in noncombustible locations.
4. Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply
Requirements in Section D).
5. Clearance provisions must be made from combustible construction as noted in this manual (refer to Dryer
Enclosure Requirements in Section C).
6. Provisions must be made for adequate clearances for servicing and for operation as noted in this manual
(refer to Dryer Enclosure Requirements in Section C).
7. Dryer must be exhausted to the outdoors as noted in this manual (refer to Exhaust Requirements in
Section E).
8. Dryer must be located in an area where correct exhaust venting can be achieved as noted in this manual
(refer to Exhaust Requirements in Section E).
IMPORTANT:Dryer shouldbelocatedwherea minimumamountofexhaustduct willbe necessary.
9. The dryer must be installed with a proper exhaust duct connection to the outside.
10. The dryer must be installed with provisions for adequate combustion and make-up air supply.
CAUTION:This dryerproduces combustiblelintand mustbeexhaustedto the outdoors. Every6
months,inspecttheexhaustducting andremoveanylintbuildup.
11. The dryer must be installed with adequate clearance for air openings into the combustion chamber.

113066 - 17 www.adclaundry.com 11
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
12-inches (30.48 cm) above the dryer’s outer top; 18-inches (45.72 cm) for steam dryers, except along the front
of the dryer which may be closed if desired.
NOTE: Allowancesmustbe madeforopeningthe control door.
X = 12-inch (30.48 cm) minimum, 24-inches (60.96 cm) is suggested for ease of maintenance.
* 1-inch (2.54 cm) maximum for electric dryers.
** 18-inch (45.72 cm) minimum for steam dryers.
NOTE: Airconsiderationsareimportantforproperandefficientoperation.
Dryers may be positioned sidewall to sidewall. However, a 1/16-inch (1.5875 mm) minimum allowance mustbe
made for 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 above for details.

12 American Dryer Corp. 113066 - 17
D. FRESH AIR SUPPLYREQUIREMENTS
This appliance may only be installed in a room that meets the appropriate ventilation requirements specified in
the national installation regulations.
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of replenished air in the amount of 600 cfm (17 cmm) is necessary for each dryer. An
unrestricted air entrance from the outdoors (atmosphere) of a minimum of 1 square foot (0.09 square meters) is
required for each dryer. This area must be enlarged if louvers or registers cover the opening. It is not
necessary to have a separate make-up air opening for each dryer. Common make-up air openings are acceptable.
However, they must be set up in such a manner that the make-up air is distributed equally to the dryers. For
example, for a bank of eight (8) dryers, a total make-up opening of 8 square feet (0.74 square meters) is
required. Two (2) openings measuring 2 feet by 2 feet (0.61 meters by 0.61 meters), 4 square feet (0.37 square
meters) are acceptable. 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 mustbe providedfroma source freeofdrycleaning solvent fumes.
Make-upairthatiscontaminated bydrycleaningsolventfumeswillresultin
irreparabledamageto the motorsandotherdryer components.
IMPORTANT: Make-up airopeningsshouldnotbelocated nearductwork exhaust outlets. If
make-upairopening(s)are too close totheexhaustoutlet,lintand fumes may be
drawnbackintothe dryer areathroughtheseopenings.
NOTE: Componentfailureduetodrycleaning solventfumeswillVOIDTHEWARRANTY.

113066 - 17 www.adclaundry.com 13
E. EXHAUST REQUIREMENTS
Exhaust ductwork shouldbe designed and installed by a qualified professional. Improperly sized ductwork will
create excessive back pressure which results in slow drying, increased use of energy, and shutdown of the
burner by the airflow (sail) switch, burner hi-limit, or lint chamber hi-heat protector thermostat. The dryer must
be installed with a proper exhaust duct connection to the outside.
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: Thisdryer produces combustiblelintand mustbeexhaustedtotheoutdoors.
Where possible, it is suggested to provide a separate (single) exhaust duct for each dryer.
CAUTION: IMPROPERLY SIZED ORINSTALLED EXHAUSTDUCTWORKCAN
CREATEAPOTENTIALFIREHAZARD.
CAUTION: DRYER MUSTBE EXHAUSTEDTOTHE OUTDOORS.
The exhaust ductwork should be laid out in such a way that the ductwork travels as directly as possible to the
outdoors with as few turns as possible. The shape of the ductwork is not critical so long as the minimum cross
section area is provided. Single or independent dryer venting is recommended.
It is suggested that the use of 90° turns be avoided; use 30° or 45° angles instead.
The ductwork should be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the ducts to be added should overlap the duct to which it is connected.
ALL ductwork joints must be taped to prevent moisture and lint from escaping into the building. Additionally,
inspection doors should be installed at strategic points in the exhaust ductwork for periodic inspection and
cleaning.
IMPORTANT: When connecting ductworktothe dryer exhaustduct,besure that whenscrewsare
usedthey DO NOTrestrictthe operation (bothopeningand closing) ofthedamper.
NOTE: Whentheexhaustductworkpassesthroughawall,ceiling,orroofmadeof combustible
materials,theopening must be2-inches(5.08cm) larger thantheduct(allthe way around).
Theductmustbecenteredwithinthisopening.
To protect the outside end of 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 shouldbe
protected from the weather by using a 180° turn to point the opening downward. In either case, allow at least
twice the diameter of the duct between the duct opening and the nearest obstruction (i.e., roof or ground level).
IMPORTANT: DONOT usescreens, louvers, orcaps ontheoutside openingof the exhaust
ductwork.
IMPORTANT: Exhaustbackpressuremeasuredbyamanometer/magnehelicintheexhaustduct
must be no less than 0 and must not exceed 0.3 in WC (0.74 mb).

14 American Dryer Corp. 113066 - 17
NOTE: Itis recommendedthatexhaust or boosterfansnot be usedinthe exhaustductworksystem
exceptwherenecessaryto maintain exhaust backpressure(intheexhaust duct) between zero
and0.3 in WC(0.74mb). Where employed, boosterfansmust notactivatethe dryer airflow
provingswitch(sailswitch)whenthedryer isnotinoperation.
SINGLEDRYERVENTING
HORIZONTAL VENTING
When horizontal single 8-inch (20.32 cm) venting is used, the ductwork to the outlet cannotexceed 30 feet (9.14
meters) refer to Illus. A below. This calculation of 30 feet (9.14 meters) compensates or allows for the use of
a maximum of only one (1) elbow (which is the outside outlet protection).
Illus. A
IMPORTANT: For extended ductworkruns, the crosssection area ofthe duct canonlybe increased
toanextent. Forextended ductwork runs, aprofessionalheating,venting,andair
conditioning(HVAC)firmshouldbeconsultedforproperventinginformation.

113066 - 17 www.adclaundry.com 15
VERTICAL VENTING
For single vertical venting, a minimum duct size of 10-inches (25.4 cm) must be used (refer to Illus. B below),
the ductwork from the dryer to the outside outlet cannot exceed 60 feet (18.29 meters), refer to Illus. B below.
This calculation compensates for the use of a maximum of three (3) elbows including the two (2) elbows
creating the 180° (turned downward) outside outlet.
Illus. B
If the length of the duct run or quantity of elbows used exceeds the above noted specifications, the cross section
area of the ductwork must be increased in proportion to the number of elbows or duct run added.
IMPORTANT: For extended ductworkruns, the crosssection area ofthe duct canonlybe increased
toanextent. Forextended ductwork runs, aprofessionalheating,venting,andair
conditioning(HVAC)firmshouldbeconsultedforproperventinginformation.

16 American Dryer Corp. 113066 - 17
MULTIPLE DRYER (COMMON) VENTING
If it is not feasible to provide separate exhaust ducts for each dryer, ducts for individual dryers may be channeled
into a common main duct. Each dryer is provided with a back draft damper. The individual ducts should enter
the bottom or side of the main duct at an angle not more than 45° in the direction of the airflow.
The main common duct may be any shape so long as the minimum cross-sectional area is provided. The main
duct should be tapered with the diameter increasing before each individual 8-inch (20.32 cm) duct is added
(refer to Illus. C for Horizontal Venting and Illus. D for Vertical Venting).
IMPORTANT: No more thanfour (4)dryersmaximum shouldbeconnectedto one (1)main
commonductwithavertical run.
NOTE: Distancebetweendryer single ducts beingconnectedtothe main common ductmustbea
minimumof34-1/4”(86.9cm)dryerwidth.
Ductwork shouldbelaid outin such amanner where allowancesare made atrear areaofthe
dryerforremoval of rear servicepanelsorguards.
The illustrations on page 17 show the minimum cross section area for multiple dryer venting. These figures
must be increased in proportion if the main duct run from the last dryer to where it exhausts has numerous
elbows or is unusually long.
IMPORTANT: For extended ductworkruns, the crosssection area ofthe duct canonlybe increased
toanextent. Forextended ductwork runs, aprofessionalheating,venting,andair
conditioning(HVAC)firmshouldbeconsultedforproperventinginformation.
Refer to the illustrations on page 17 for examples of Multiple Dryer Horizontal Venting and Vertical Venting.