American Dryer Corp. AD-120ES II User manual

For replacement parts, contact the reseller from which the dryer
was purchased or
AmericanDryerCorporation
88Currant Road
FallRiverMA02720-4781USA
Telephone:[phone] / Fax:[phone]
e-mail:[e-mail]
www.amdry.com
WARNING: Foryoursafetytheinformationin
thismanual mustbe followedto minimizethe
riskof fireor explosionor toprevent property
damage,personalinjury or death.
— Donot storeoruse gasolineor other flammable
vapors and liquids in the vicinity of this or any
otherappliance.
— WHATTODO IFYOU SMELLGAS:
• Donottryto lightany appliance.
• Donottouch anyelectricalswitch;do not
useanyphoneinyourbuilding.
• Cleartheroom, building orareaofall
occupants.
• Immediatelycallyourgassupplierfroma
neighbor’sphone. Followthe gassupplier’s
instructions.
• Ifyoucannotreach yourgas supplier,call
thefiredepartment.
— Installationand servicemustbe performedby a
qualified installer, service agency or the gas
supplier.
AVERTISSEMENT: Assurez-vous de bien
suivrelesinstructionsdonnéesdanscettenotice
pourréduire auminimumle risqued’incendie
ou d’explosion ou pour éviter tout dommage
matériel,touteblessureou lamort.
— Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables à
proximité de cet appareil ou de tout autre
appareil.
— QUEFAIRESIVOUSSENTEZUNEODEUR
DEGAZ:
• Nepastenter d’allumerd’appareils.
• Netouchez àaucun interrupteur. Ne pas
vousservirdes téléphonessetrouvant dans
lebâtiment.
• Évacuezlapièce,le bâtimentoulazone.
• Appelezimmédiatementvotrefournisseur
degazdepuisunvoisin. Suivezles
instructionsdufournisseur.
• Sivousnepouvezrejoindrelefournisseur
degaz,appelez leservicedes incendies.
— L’installationetl’entretiendoiventêtreassuréspar
uninstallateurou unserviced’entretienqualifié
ouparle fournisseurdegaz.
082101JEV/calbert ADCPartNo.113334
AD-120ES III
(Extended Side Panels)
Installation Manual

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.
“IMPORTANTNOTETOPURCHASER”
Informationmustbeobtainedfromyourlocalgassupplierontheinstructions
tobefollowed iftheusersmells gas. Theseinstructionsmustbeposted ina
prominentlocationnearthedryer.
FORYOUR SAFETY
Donot storeor usegasoline or
otherflammablevaporsand
liquidsinthevicinityofthisor
anyotherappliance.
POURVOTRESÉCURITÉ
Nepas entreposer niutiliserd’essence
nid’autresvapeursouliquides
inflammablesàproximitédecet
appareilou detoutautre appareil.
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 ADCfactory. When orderingreplacement partsfrom thefactory,
you can FAX your order to ADC at [phone] or telephone your order directly to the ADC Parts Department at (508)
678-9000. Pleasespecify the dryermodel numberand serial numberin addition to thedescriptionand partnumber,sothat
your order is processed accurately and promptly.
AD-120ES III

WARNING
UNDER NOCIRCUMSTANCESshouldthedryerdoorswitch,lintdrawerswitch,heat
safety circuits ever be disabled.
IMPORTANT
YOUMUSTDISCONNECTANDLOCKOUTTHEELECTRICSUPPLYANDTHEGAS
SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, OR TESTING OFANY EQUIPMENT PER OSHA
(OccupationalSafetyand HealthAdministration)STANDARDS.
WARNING
CHILDRENSHOULD NOTBEALLOWEDTOPLAYONORNEARTHEDRYER(S).
CHILDRENSHOULDBESUPERVISEDIFNEARDRYERSINOPERATION.
CAUTION
DRYERSSHOULDNEVERBELEFTUNATTENDEDWHILEINOPERATION.
FORYOURSAFETY
DONOTDRYMOPHEADSINTHEDRYER.
DONOTUSEDRYERINTHEPRESENCEOFDRYCLEANINGFUMES.
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
«Attention: Au moment de l’entretien des
commandes,étiqueteztous les filsavantde
les débrancher. Des erreurs de câblage
peuvent entraîner un fonctionnement
inadéquatetdangereux.»

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
DRYERMUSTNEVERBE OPERATEDWITHOUTTHELINTFILTER/SCREENIN
PLACE,EVENIFANEXTERNALLINTCOLLECTIONSYSTEMISUSED.
Dryer mustnotbeinstalled or stored in an area where it willbe exposed to water or weather.
The wiring diagram for the dryer is located in the front electrical control box area.
IMPORTANT
Dryer must be installed in a location/environment, which the ambient temperature
remains between 40° F (4.44° C) and 130° F (54.44° C).

Table of Contents
SECTION I
IMPORTANT INFORMATION ...............................................................................3
A. ReceivingandHandling ............................................................................................................... 3
B. SafetyPrecautions ...................................................................................................................... 4
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION..................................... 6
A. Specifications ............................................................................................................................. 6
B. ComponentIdentification ............................................................................................................ 8
SECTION III
INSTALLATION PROCEDURES .........................................................................10
A. LocationRequirements ............................................................................................................. 10
B. Unpacking/SettingUp ............................................................................................................... 11
C. DryerEnclosureRequirements .................................................................................................. 14
D. FreshAirSupplyRequirements ................................................................................................. 15
E. ExhaustRequirements ............................................................................................................... 16
F. ElectricalInformation ................................................................................................................ 22
G. GasInformation ........................................................................................................................ 27
H. SteamInformation .................................................................................................................... 31
I. PreparationFor Operation ........................................................................................................ 35
J. PreoperationalTests ................................................................................................................. 36
K. ShutdownInstructions............................................................................................................... 38
L. OperatingInstructions ............................................................................................................... 39
SECTION IV
SERVICE/PARTS INFORMATION ......................................................................40
A. Service ..................................................................................................................................... 40
B. Parts ........................................................................................................................................ 40
SECTION V
WARRANTY INFORMATION...............................................................................41
A. ReturningWarrantyCards......................................................................................................... 41
B. Warranty .................................................................................................................................. 41
C. ReturningWarrantyParts .......................................................................................................... 41

SECTION VI
ROUTINE MAINTENANCE ..................................................................................43
A. Cleaning ................................................................................................................................... 43
B. Adjustments ............................................................................................................................. 45
C. Lubrication ............................................................................................................................... 45
SECTION VII
TROUBLESHOOTING ...........................................................................................46
MicroprocessorController(Computer) Models .............................................................................. 46
TimerModels ................................................................................................................................. 52
SECTION VIII
DATA LABEL INFORMATION .............................................................................57
A. Data Label ............................................................................................................................... 57
SECTION IX
REVERSING TIMER SPIN/DWELL ADJUSTMENTS.....................................59
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS........................................................................................................60
SECTION XI
BURNER AND BASKET (TUMBLER)/LINT CHAMBER MANUAL RESET
HI-LIMIT INSTRUCTIONS ...................................................................................62
GasModelsOnly ........................................................................................................................... 62
ElectricorSteam Models Only ....................................................................................................... 63

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/or 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, and ALL 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 (508)
678-9000.
IMPORTANT: Thedryer mustbetransportedandhandledin anuprightposition at ALLtimes.

4
B. SAFETY PRECAUTIONS
WARNING: Foryoursafety,theinformationinthismanualmustbefollowed to minimizetherisk of
fireorexplosion ortopreventproperty damage,personalinjury,or loss oflife.
WARNING: The dryer mustnever beoperatedwith any ofthe back guards,outer tops,
orservice panelsremoved. PERSONALINJURYORFIRE COULD RESULT.
1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
2. Purchaser/user should consult the local gas supplier for proper instructions to be followed in the event
the user smells gas. The instructions should be posted in a prominent location.
3. WHAT TO DO IF YOU SMELL GAS...
a. DO NOT try to light any appliance.
b. DO NOT touch any electrical switch.
c. DO NOT use any phone in your building.
d. Clear the room, building, or area of 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.
4. Installation and service must be performed by a qualified installer, service agency, or gas supplier.
5. Dryer(s) must be exhausted to the outdoors.
6. Although ADC produces a very versatile dryer, there are some articles that, due to fabric composition
or cleaning method, should not be dried in it.
WARNING: Dry only water washed fabrics. DONOTdryarticles spottedor washedin dry
cleaningsolvents,acombustibledetergent,or“allpurpose”cleaner.
EXPLOSIONCOULDRESULT.
WARNING: DONOT dry rags orarticles coatedorcontaminated withgasoline, kerosene, oil,paint,
orwax.
EXPLOSIONCOULDRESULT.
WARNING: DONOTdrymopheads. Contamination bywaxor flammablesolventswill createa
firehazard.
WARNING: DONOT useheat for dryingarticles thatcontainplastic, foam,spongerubber, or
similarlytexturedrubbermaterials. Dryinginaheatedbasket (tumbler) maydamage
plasticsor rubberandmay bea firehazard.

5
7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust
ductwork, and inside the dryer. The frequency of inspection and cleaning can best be determined from
experience at each location.
WARNING: The collectionoflintinthe burnerareaandexhaust ductworkcancreateapotential fire
hazard.
8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the
National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the Canadian Electrical
Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
NOTE: Failureto dosowillVOIDTHEWARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switch, lint drawer switch, heat safety circuits
ever be disabled.
WARNING: PERSONALINJURYOR FIRECOULD RESULT.
10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.
11. Remove articles from the dryer as soon as the drying cycle has been completed.
WARNING: Articles leftin thedryerafterthedryingand coolingcycles havebeencompletedcan
createa firehazard.
12. DO NOT operate steam dryers with more than 125 PSI (8.61 bar) steam pressure. Excessive steam
pressure can damage steam coil and/or harm personnel.
13. Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with
leaking flexible hoses. PERSONAL INJURY MAY RESULT.
14. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE
DRYER.
15. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%), 79 lbs (35.4 kg) of its rated capacity.
WARNING: YOUMUSTDISCONNECTANDLOCKOUTTHEELECTRICSUPPLY
ANDTHEGASSUPPLYORTHESTEAMSUPPLYBEFOREANYCOVERS
ORGUARDSARE REMOVED FROMTHE MACHINETOALLOW
ACCESSFOR CLEANING,ADJUSTING,INSTALLATION, ORTESTINGOF
ANYEQUIPMENTPEROSHA(OccupationalSafety andHealthAdministration)
STANDARDS.
IMPORTANT: Dryermustbeinstalledinalocation/environment,which theambient
temperatureremains between40ºF (4.44ºC)and 130ºF (54.44ºC).

6
SECTIONII
SPECIFICATIONS/COMPONENTIDENTIFICATION
A. SPECIFICATIONS
IMPORTANT: Steam dryers mustbeprovided with a clean, dry, and regulated 80 PSI +/- 10 PSI
(5.51 bar +/- 0.68 bar) air supply.
NOTE: ADCreserves therighttomakechanges inspecifications atanytimewithoutnotice or
obligation.
Gas
Electric
Steam
MAXIMUM CAPACITY (DRY WEIGHT) 120 lbs 54.4 kg
BASKET (TUMBLER) DIAMETER 44-1/2” 113 cm
BASKET (TUMBLER) DEPTH 42-1/2” 107.9 cm
BASKET (TUMBLER) MOTOR 3/4 hp 0.560 kW
BLOWER MOTOR 3 hp 2.238 kW
DOOR OPENING (DIAMETER) 31-3/8” 79.7 cm
BASKET (TUMBLER) VOLUME 38.2 cu.ft. 1.08 cu.m.
DRYERS PER 20’/40’ CONTAINER 3/7
DRYERS PER 45’/48’ TRUCK 9/9
VOLTAGE AVAILABLE 208-575v 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 1,349 lbs 611.9 kg
APPROX. WEIGHT (CRATED) 1,489 lbs 675.4 kg
HEAT INPUT 375,000 Btu/hr 94,500 kcal/hr
AIRFLOW 2,150 cfm 60.88 cmm
INLET SIZE 1”
VOLTAGE AVAILABLE 208-575v 3ø 3, 4w 50/60 Hz
OVEN SIZE
kW Btu/hr kcal/hr AIRFLOW
72 245,729 61,924 2,150 cfm 60.88 cmm
APPLIED VOLTAGE/PHASE/APPROX. AMP DRAW
kW 208/3ø 240/3ø 380/3ø 460/3ø
60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
72 214 -- 188 191 -- 118 98 --
VOLTAGE AVAILABLE 208-575v 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 1,650 lbs 748.4 kg
APPROX. WEIGHT (CRATED) 1,790 lbs 811.9 kg
STEAM CONSUMPTION 450 lbs/hr 204 kg/hr
AIRFLOW 2,150 cfm 60.88 cmm
HEAT INPUT 13 Bhp
SUPPLY CONNECTION 1-1/4”
RETURN CONNECTION 1-1/4”
COMPRESSED AIR CONNECTION 1/8” F.N.P.T.
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
Shaded areas are stated in metric equivalents
051503

7
NOTE: ADCreserves therighttomakechanges inspecifications atanytimewithoutnotice or
obligation.
NOTE: Operatingheight ofsteamdryeris 89-inches(226.1cm).
E XHAUST
D UCT D IA .D
IM .
"A" D
IM .
"B"
14"
35.5 cm 11-1/4" 28.6 cm 9-1/2" 24.1 cm
Specifications
ADG-120ES III
ADE-120ES III
ADS-120ES III

8
B. COMPONENT IDENTIFICATION
1. Dryer Front View
Illus. No. Description
1 Microprocessor Control/Keyboard (touch pad) PanelAssembly (controls)
2 Control (top access) Door Assembly
3 Main DoorAssembly
4 Lint DoorAssembly
5 Lint Drawer
6 Wire Diagram (located behind control door)
7 Top Console (module)Assembly

9
2. Dryer Rear View
Illus. No. Description
1 Basket (tumbler) Drive MotorAssembly
2 Blower Motor MountAssembly
3 Blower Motor (impellor/fan)Assembly
4 Idler Bearing MountAssembly
5 Basket (tumbler) Bearing MountAssembly
6* Electric Service Relay Box
7 Heating Unit
8 Data Label and Installation Label
* Electric service connections are made in this box.

10
SECTIONIII
INSTALLATIONPROCEDURES
Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installation mustconform to applicableAmerican National Standards:ANSI Z223.1-
LATEST EDITION (National Fuel Gas Code) orANSI/NFPA NO. 70-LATEST EDITION (National Electrical
Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-M91
(Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION (for General
Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST
EDITION (for Electrical Connections).
A. LOCATION REQUIREMENTS
Before installing the dryer, be sure the location conforms to local codes and ordinances. In the absence of such
codes or ordinances the location must conform with the National Fuel Gas Code ANSI.Z223.1 LATEST
EDITION, or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-
M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION (for General Installation and
Gas Plumbing).
1. The dryer must be installed on a sound level floor capable of supporting its weight. Carpeting must be
removed from the floor area that the dryer is to rest on.
IMPORTANT: “Thedryermustbeinstalledon noncombustiblefloors only.”
2. The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.
3. The dryer is for use in noncombustible locations.
4. Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply
Requirements in Section D).
5. Clearance provisions must be made from combustible construction as noted in this manual (refer to
Dryer Enclosure Requirements in Section C).
6. Provisions must be made for adequate clearances for servicing and for operation as noted in this manual
(refer to Dryer Enclosure Requirements in Section C).
7. Dryer must be exhausted to the outdoors as noted in this manual (refer to Exhaust Requirements
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: Dryershouldbelocatedwhere aminimumamountof exhaustductwillbe necessary.
9. The dryer must be installed with a proper exhaust duct connection to the outside.

11
10. The dryer must be installed with provisions for adequate combustion and make-up air supply.
CAUTION: Thisdryer producescombustiblelint andmustbeexhausted tothe outdoors. Every6
months,inspecttheexhaustductingandremoveanylintbuildup.
IMPORTANT: Dryermustbeinstalledinalocation/environment,which theambient
temperatureremains between40ºF (4.44ºC)and 130ºF (54.44ºC).
B. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer.
IMPORTANT: Dryermustbetransportedandhandledin anuprightpositionat ALLtimes.
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) lag bolts securing the base of the dryer to the wooden skid. Two (2) are
located at the rear base (remove the back panel for access) and two (2) are located in the bottom of the lint
chamber. To remove the two (2) lag bolts located in the lint chamber area, remove the lint drawer and the three
(3) Phillips head screws securing lint door in place.
1. Leveling Dryer
a. To level dryer, place 4-inch (10.16 cm) square metal shims (refer to illustration above) or other
suitable material under the base pads. It is suggested that the dryer be tilted slightly to the rear.

12
2. If more headroom is needed when moving dryer into position, the top console (module) may be removed.
a. To Remove Top Console (Module)
1) Disconnect the ground wire (A) at the rear upper left hand corner of dryer.
2) Remove the eight (8) sets of nuts and washers (B) holding the console (module) to base.
3) Open the control door/control panel and disconnect the white 15-pin plug connector (C)
(refer to the illustration below) located in the base of the control box.
4) Disconnect white plug connector located outside back side of the control box (provides power to
heat circuit).
5) Lift the console (module) off the dryer base.
IMPORTANT: Thedryer mustbetransportedandhandledin anuprightposition at ALLtimes.

13
3. Exhaust Transition Piece (Gas and Electric Only!)
a. Inside the basket (tumbler) of this dryer is an exhaust
transition piece that must be installed on the outlet of
the exhaust before any further venting is connected:
1) Remove the exhaust transition piece from the
basket(tumbler) and place it on the exhaust outlet.
2) Using the screws provided, secure the exhaust
transition piece to the dryer.
NOTE: Itis recommended thatthis jointbe taped
aswellas ALLotherduct jointstoprevent
moistureandlintfromescapingintothe
building.
WARNING
Anexhaustducttransitionpieceisshippedinsideofthedryer’s
tumbler and must be installed on the dryer’s
exhaust duct, with the hardware provided, BEFORE
locationventingisconnected to thedryer.
THIS EXHAUST DUCT TRANSITION PIECE
MUST BE INSTALLED FIRST!
Failureto observethis installationrequirement mayresult in
damage to the dryer, create a FIRE HAZARD and will VOID
themanufacturer’swarranty.
012999JEV-GS/cj P/N: 114092

14
C. DRYER ENCLOSURE REQUIREMENTS
Even though a 12-inch (30.48 cm) clearance is acceptable, it is recommended that the rear of the dryer be
positioned approximately 2 feet (0.60 meters) from the nearest obstruction (i.e., wall) for ease of installation,
maintenance, and service. Bulkheads and partitions should be made from noncombustible materials. The
clearance between the bulkhead header and the dryer must be a minimum of 4-inches (10.16 cm) and must not
extend more than 4-inches (10.16 cm) to the rear of the dryer front. The bulkhead facing must not be closed
in ALL the way to the top of the dryer. A 2-inch (5.08 cm) clearance is required.
NOTE: Bulkheadfacing shouldnotbeinstalleduntilafter dryerisin place. Ceiling areamustbe
locateda minimumof12-inches (30.48cm)above thetopof thedryer.
IMPORTANT: Eventhougha minimum ofonly 12-inches(30.48 cm)is required,18-inches
(45.72cm) ormoreis suggested,forsteam dryersandespecially incases where
sprinklerheads areoverthe dryers.
NOTE: Whenfiresprinkler systemsarelocatedabove thedryers,aminimum of18-inches(45.72cm)
abovethedryer console(module)issuggested. Dryersmay bepositionedsidewallto sidewall
however, 1or 2-inches(2.54 cmor 5.08cm) issuggested betweendryers (orwall) forease
ofinstallationandmaintenance. Allowancesmustbemade fortheopeningandclosingof the
controlandlint doors.

15
D. FRESH AIR SUPPLYREQUIREMENTS
When the dryer is operating, it draws in room air, heats it, passes this air through the basket (tumbler), and
exhausts it out of the building. Therefore, the room air mustbecontinually replenished from the outdoors. If the
make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and
sail switch “fluttering” problems may result, as well as premature motor failure from overheating.
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 2,150 cfm (cubic feet per minute) 60.88
cmm (cubic meters per minutes) must be supplied to each gas, electric, and steam dryer. As a general rule, an
unrestricted air entrance from the outdoors (atmosphere) of a minimum of 3 square feet (0.28 square meters) is
required for each gas, electric, and steam dryer.
To compensate for the use of registers or louvers used over the openings, this make-up air area must be
increased by approximately thirty-three percent (33%). Make-up air openings should not be located in an area
directly near where exhaust vents exit the building.
It is not necessary to have 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. The dryer must be installed with provisions for adequate combustion and make-up air supply.
EXAMPLE: For a bank of six (6) gas dryers, two (2) openings measuring 3 feet by 3 feet (0.91
meters by 0.91 meters) 9 square feet (0.84 square 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.

16
IMPORTANT: Make-up airmustbeprovided from asourcefree ofdrycleaning solventfumes.
Make-upairthatiscontaminatedbydrycleaningsolventfumeswillresultin
irreparabledamage tothemotors andotherdryer components.
NOTE: ComponentfailureduetodrycleaningsolventfumeswillVOIDTHEWARRANTY.
E. EXHAUST REQUIREMENTS
1. General Exhaust Ductwork Information
Exhaust ductwork shouldbedesigned and installed by a qualified professional. Improperly sized ductwork
will create excessive back pressure which results in slow drying, increased use of energy, overheating of
the dryer, and shutdown of the burner by the airflow (sail) switches, burner hi-limits, or basket (tumbler)
hi-heat thermostats. The dryer must be installed with a proper exhaust duct connection to the outside.
CAUTION: Thisdryer producescombustiblelint andmustbeexhausted totheoutdoors.
CAUTION: IMPROPERLYSIZED ORINSTALLED EXHAUSTDUCTWORKCAN
CREATEAPOTENTIALFIREHAZARD.
NOTE: Whena dryeris exhaustedseparately, itis recommendedthata backdraft damperbe
installed.
NOTE: Whendryersare exhaustedintoamultiple (common)exhaustline,each dryer mustbe
suppliedwith abackdraft damper.
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. Single or independent dryer venting is recommended. When
single dryer venting is used, the ductwork from the dryer to the outside exhaust outlet must not exceed 20
feet (6.09 meters). In the case of multiple (common) dryer venting, the distance from the last dryer to the
outside exhaust outlet must not exceed 20 feet (6.09 meters). The shape of the ductwork is not critical
so long as the minimum cross section area is provided. It is suggested that the use of 90º turns in ducting
be avoided; use 30º and/or 45º angles instead. The radius of the elbows should preferably be 1-1/2 times
the diameter of the duct. Excluding basket (tumbler) dryer elbow connections or elbows used for outside
protection from the weather, no more than two (2) elbows should be used in the exhaust duct run. If more
than two (2) elbows are used, the cross section area of the ductwork must be increased in proportion to
number of elbows added.
IMPORTANT: Itisrecommended thatexhaust orbooster fansnotbe usedin theexhaust ductwork
system.
NOTE: Asper theNationalFuel GasCode, “Exhaustductsfor type2 clothesdryersshall be
constructedofsheetmetalor othernoncombustible material. Suchductsshallbeequivalentin
strengthandcorrosion resistancetoductsmade of galvanizedsheetsteelnot lessthan
0.0195-inches(26 gauge [0.05mm])thick.”