ADC AD-30V User manual

AD-30V
(8-Inch Exhaust Duct)
Installation Manual
For replacement parts, contact the reseller from which the dryer
was purchased or
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781
Telephone: [phone] / Fax: [phone]
e-mail: [email protected]
www.amdry.com
WARNING: For your safety the information in
this manual must be followed to minimize the
risk of fire or explosion or to prevent property
damage, personal injury or death.
—Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
—WHAT TO DO IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch any electrical switch; do not
use any phone in your building.
•Clear the room, building or area of all
occupants.
•Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
•If you cannot reach your gas supplier, call
the fire department.
—Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
AVERTISSEMENT: Assurez-vous de bien
suivre les instructions données dans cette notice
pour réduire au minimum le risque d’incendie
ou d’explosion ou pour éviter tout dommage
matériel, toute blessure ou la mort.
—Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables à
proximité de cet appareil ou de tout autre
appareil.
—QUEFAIRESIVOUSSENTEZUNEODEUR
DE GAZ:
•Ne pas tenter d’allumer d’appareils.
•Ne touchez à aucun interrupteur. Ne pas
vous servir des téléphones se trouvant dans
le bâtiment.
•Évacuez la pièce, le bâtiment ou la zone.
•Appelez immédiatement votre fournisseur
de gaz depuis un voisin. Suivez les
instructions du fournisseur.
•Si vous ne pouvez rejoindre le fournisseur
de gaz, appelez le service des incendies.
—L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualifié
ou par le fournisseur de gaz.
042001JEV/calbert ADC Part No. 113326

AD-30V
Retain This Manual In A Safe 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.
OBSERVEALLSAFETYPRECAUTIONS displayed on the equipment or specified in the installation manual included with
the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
“IMPORTANT NOTE TO PURCHASER”
Information must beobtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions must be posted in a
prominent location near the dryer.
FOR YOUR SAFETY
Do not store or use gasoline or
other flammable vapors and
liquids in the vicinity of this or
any other appliance.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables à proximité de cet
appareil ou de tout autre appareil.
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:
DATE OF PURCHASE________________________________ MODELNO. __________________________________________
RESELLER’S NAME ________________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Replacement parts can be obtained from your reseller or theADCfactory. When orderingreplacementparts fromthefactory,
you can FAX your order to ADC at [phone] or telephone your order directly to the ADC Parts Department at (508)
678-9000. Please specify the dryer model number andserialnumberin addition to the description andpart number,sothat
your order is processed accurately and promptly.

IMPORTANT
YOUMUST DISCONNECTANDLOCKOUTTHEELECTRICSUPPLY ANDTHEGAS
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
(Occupational Safety and Health Administration)STANDARDS.
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE
DRYER(S). CHILDREN SHOULD BE SUPERVISED IF NEAR DRYER(S) IN
OPERATION.
WARNING
DRYER(S) SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.
CAUTION
FOR YOUR SAFETY
DO NOTDRY MOP HEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the dryer door switch, lint drawer switch, or
heat safety circuit ever be disabled.
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
«Attention: Lor des opérations
d’entretien des commandes étiqueter tous
filsnt de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»

WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY OR FIRE COULD RESULT.
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/
or specified in the installation manual included with the dryer.
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.
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN
PLACE...EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
WARNING

SECTION I
IMPORTANT INFORMATION..........................................................................3
A. Receiving and Handling ............................................................................................................... 3
B. Safety Precautions ...................................................................................................................... 4
SECTION II
SPECIFICATIONS ..............................................................................................6
A. Specifications ............................................................................................................................. 6
SECTION III
INSTALLATION PROCEDURES ......................................................................8
A. Unpacking/Setting Up ................................................................................................................. 8
B. Location Requirements ............................................................................................................... 9
C. Dryer Enclosure Requirements .................................................................................................. 10
D. Fresh Air Supply Requirements ..................................................................................................11
E. Exhaust Requirements ............................................................................................................... 12
F. Electrical Information ................................................................................................................ 18
G. Gas Information........................................................................................................................ 24
H. Steam Information .................................................................................................................... 28
I. Preparation For Operation/Start-Up ......................................................................................... 33
J. Preoperational Tests ................................................................................................................. 34
K. Preoperational Instructions ........................................................................................................ 35
L. Shut Down Instructions ............................................................................................................. 38
SECTION IV
SERVICE/PARTS INFORMATION .................................................................39
A. Service ..................................................................................................................................... 39
B. Parts ........................................................................................................................................ 39
SECTION V
WARRANTY INFORMATION .........................................................................40
A. Returning Warranty Cards......................................................................................................... 40
B. Warranty .................................................................................................................................. 40
C. Returning Warranty Parts .......................................................................................................... 40
Table of Contents

SECTION VI
ROUTINE MAINTENANCE ............................................................................42
A. Cleaning ................................................................................................................................... 42
B. Adjustments ............................................................................................................................. 43
C. Lubrication ............................................................................................................................... 43
D. Lint Drawer Removal................................................................................................................ 44
SECTION VII
TROUBLESHOOTING .....................................................................................45
Microprocessor Controller (Computer) Models .............................................................................. 45
Dual Timer Models ......................................................................................................................... 51
SECTION VIII
DATA LABEL INFORMATION........................................................................55
A. Data Label ............................................................................................................................... 55
SECTION IX
REVERSING TIMER SPIN/DWELL ADJUSTMENTS ..................................57
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS.................................................................................................58
SECTION XI
BURNER AND BASKET (TUMBLER)/LINT CHAMBER
MANUAL RESET HI-LIMIT INSTRUCTIONS ..............................................61

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 (508)
678-9000.
IMPORTANT: Thedryer mustbetransported and handled inan uprightposition at ALLtimes.

4
B. SAFETY PRECAUTIONS
WARNING: Foryoursafety,theinformationinthismanualmustbefollowedtominimizetheriskof
fireor explosion orto preventproperty damage, personalinjury, or lossoflife.
WARNING: Thedryermustnever be operatedwithany of the back guards, outertops,or
servicepanelsremoved. PERSONALINJURY OR FIRE COULDRESULT.
1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
2. 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.
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 ALL occupants.
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. Dryers 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: Dryonly water washedfabrics. DO NOT dryarticles spottedor washedin dry
cleaningsolvents,acombustibledetergent,or“allpurpose”cleaner.
EXPLOSIONCOULD RESULT.
WARNING: DONOTdryrags orarticles coatedor contaminated with gasoline, kerosene, oil, paint,
orwax.
EXPLOSIONCOULD RESULT.

5
WARNING: DONOTdry mop heads. Contaminationby waxor flammable solventswill create a
firehazard.
WARNING: DONOTuseheat fordrying articles that contain plastic, foam, spongerubber, or
similarlytexturedrubbermaterials. Dryinginaheatedbasket(tumbler)maydamage
plasticsor rubberand alsomay be a fire hazard.
7. A programshouldbeestablishedfortheinspectionandcleaningoflintintheburnerarea,exhaustductwork,
and area around the back of the dryer. The frequency of inspection and cleaning can best be determined
from experience at each location.
WARNING: Thecollectionof lint intheburnerarea and exhaustductworkcan create apotentialfire
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 doso willVOID THEWARRANTY.
9. UNDER NO CIRCUMSTANCESshould the dryer door switch, lint drawer switch, or heat safety circuit
ever be disabled.
WARNING: PERSONALINJURY ORFIRECOULD 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: Articlesleftinthe dryer afterthedryingand cooling cycleshavebeen completed can
createa fire hazard.
12. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE
DRYER.
13. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%) 19 lbs (8.61 kg) of its rated capacity.
WARNING: YOUMUST DISCONNECTANDLOCKOUTTHEELECTRICSUPPLYAND
THEGAS SUPPLYORTHE STEAMSUPPLY BEFOREANYCOVERSOR
GUARDSAREREMOVEDFROMTHEMACHINETOALLOWACCESS
FORCLEANING,ADJUSTING,INSTALLATION,ORTESTINGOFANY
EQUIPMENTPEROSHA(OccupationalSafetyandHealthAdministration)
STANDARDS.

6
SECTIONII
SPECIFICATIONS
A. SPECIFICATIONS
*AD-30V reversing dryer available with 3-phase (3ø) 1/2 HP (0.373 kw) motors standard.
** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
*** Contact factory for information not listed, 3-phase (3ø) figures shown are for 3-wire service.
**** Specify air-operated or electromechanical steam damper system. Air-operated steam damper system must be provided with
clean, dry and regulated 80 PSI ± 10 PSI (5.51 bars ± 0.68 bars) air supply.
NOTE: ADCreservestherighttomakechangesinspecificationsat any time withoutnoticeor
obligation.
Gas
ElectricSteam****
MAXIMUM CAPACITY (DRY WEIGHT) 30 lbs 13.6 kg
BASKET (TUMBLER) DIAMETER 32-3/4” 83.2 cm
BASKET (TUMBLER) DEPTH 25-5/8” 65.1 cm
BASKET (TUMBLER) MOTOR 1/2 HP* 0.373 kw
DOOR OPENING (DIAMETER) 21-1/2” 54.61 cm
BASKET (TUMBLER) VOLUME 12.5 cu. ft. 0.354 cu.m.
DRYERS PER 20’/40’ CONTAINER 12/26
DRYERS PER 45’/48’ TRUCK 30/32
VOLTAGE AVAILABLE 120-460v 1ø - 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 534 lbs 242 kg
APPROX. WEIGHT (CRATED) 571 lbs 259 kg
HEAT INPUT 100,000 btuh 25,200 kcal/hr
AIRFLOW 460 cfm 13 cmm
INLET PIPE CONNECTION 1/2” F.P.T.**
OVEN SIZE
KW BTUH
(60 Hz)KCAL/HR (50 Hz)
20 68,250 17,200
24 81,900 20,640
APPLIED VOLTAGE/PHASE/APPROX. AMP DRAW***
KW 208/1Ø 240/1ø 208/3ø 240/3ø 380/3ø 416/3ø 460/3ø
60 Hz50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
20 102 --- 89 88 --- --- --- --- --- 33 --- --- --- ---
24 --- --- --- --- 70 --- 61 62 --- --- --- 36 32 ---
VOLTAGE AVAILABLE 120-460v 1ø - 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 593 lbs 269 kg
APPROX. WEIGHT (CRATED) 631 lbs 286 kg
AIRFLOW 460 cfm 13 cmm
COMPRESSED AIR VOLUME 0.5 cfh 0.014 cmh
AIR CONNECTION 1/8” F.P.T.
STEAM CONSUMPTION BOILER HP NORMAL LOAD
LOW 90.1 lbs/hr 40.9 kg/hr 2.6
HIGH 104 lbs/hr 47.2 kg/hr 3.0
OPERATING STEAM PRESSURE STEAM SUPPLY STEAM RETURN
LOW 15 PSI 1.03 bars 1” 1”
HIGH 125 PSI 8.6 bars 1” 1”
Shaded areas are stated in metric equivalents

7
NOTE: ADCreservestherighttomakechangesinspecificationsat any time withoutnoticeor
obligation.
Specifications
ADG-30V
ADE-30V
ADS-30V

8
SECTIONIII
INSTALLATIONPROCEDURES
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 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 mustconformto 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
InstallationandGasPlumbing)orCanadianElectricalCodesParts1&2CSAC22.1-1990orLATEST EDITION
(for Electrical Connections).
A. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.
IMPORTANT: Dryermustbetransported andhandled in anupright position atALLtimes.
NOTE: ForOPL dryermodels equippedwith locks, the lock used is a dummy lock and no key is
suppliedor needed. The lock can beturned withany key, ascrewdriver, asmall coin,or any
smallsharp object. For coin-operateddryers, the MK-100 (master key for both thecontrol
doorand lint door) shouldbemade accessiblebecause it willbeneededthroughoutvarious
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
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) 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.
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.

9
B. 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 (Liquid Propane [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: “Thedryermustbeinstalledonnoncombustiblefloors 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 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: Dryershould belocatedwhere a minimumamount ofexhaust duct will benecessary.
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: Thisdryer producescombustible lintand mustbeexhaustedtothe outdoors. Every 6
months,inspecttheexhaustductingandremoveanylintbuildup.

10
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: Allowancesmust bemadeforopening thecontrol door.
NOTE: Withtheexceptionofthe floor, clearances shownareforcombustibleconstruction.
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: Airconsiderationsareimportant for properandefficientoperation.
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. 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.

11
D. FRESH AIR SUPPLYREQUIREMENTS
The AD-30V 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. As a general rule, an unrestricted air
entrance from the outdoors (atmosphere) of a minimum of 1-1/2 square feet (0.14 square meters) is required for
each dryer. If registers or louvers are installed over the openings, then the area must be increased. It is not
necessary to have separate make-up air openings for each dryer. Common make-up air openings are acceptable.
However, they must be set up in such a manner that the make-up air is distributed equally to the dryers. The
dryer must be installed with provisions for adequate combustion and make-up air supply.
EXAMPLE:For a bank of eight (8) dryers, two (2) unrestricted openings measuring 3 feet by 2 feet (0.914
meters by 0.61 meters) (6 square feet [0.557 square meters]) is acceptable.
IMPORTANT: Make-up air openings shouldnotbelocatedin an areadirectly nearwhere exhaust
ventsexitthebuilding.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT: Make-upair mustbe provided from asource free ofdry cleaning solventfumes.
Make-upairthatiscontaminatedbydrycleaningsolventfumeswillresultin
irreparabledamage to themotors andother dryer components.
NOTE: Componentfailureduetodrycleaningsolventfumes willVOIDTHEWARRANTY.

12
E. EXHAUST REQUIREMENTS
Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork will
create excessive back pressure which results in slow drying, increased use of energy, and shutdown of the
burner by the airflow (sail) switch, burner hi-limits, or lint chamber hi-limit protector thermostat. The dryer must
be installed with a proper exhaust duct connection to the outside.
Where possible, it is suggested to provide a separate (single) exhaust duct for each dryer.
CAUTION: Thisdryer producescombustible lintand mustbe exhausted to theoutdoors.
CAUTION: IMPROPERLY SIZEDORINSTALLEDEXHAUSTDUCTWORKCAN
CREATEAPOTENTIALFIREHAZARD.
CAUTION: DRYERMUST BEEXHAUSTEDTOTHEOUTDOORS.
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.
ALLductwork 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: Whenconnecting ductwork tothe dryer exhaustduct, be surethat when screwsare
used theyDONOTrestrict theoperation (both opening and closing)of thedamper.
NOTE: Whentheexhaustductworkpasses through a wall,ceiling,orroofmade of combustible
materials,the openingmustbe 2-inches (5.08cm) larger thanthe duct(all the wayaround).
Theductmustbecenteredwithinthisopening.
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 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: DONOTuse screens, louvers, or caps on theoutside openingof theexhaust
ductwork.
IMPORTANT: Exhaustback pressuremeasured by a manometer at the dryerexhaust ductarea must
beno less than 0 and must not exceed 0.3 inches (0.74 mb) of water column
(W.C.).

13
SINGLEDRYERVENTING
IMPORTANT: Forexhaustduct runsover20 feet(6.1meters) aminimumsize of10-inches(25.4
cm) must be used.
HORIZONTAL VENTING
When a single 8-inch (20.32 cm) horizontal vent is used, the ductwork to the outlet cannot exceed 20 feet (6.1
meters), refer to Illus. Abelow. This calculation of 20 feet (6.1 meters) compensates or allows for the use of
a maximum of only one (1) elbow, (which is the outside outlet protection).
Illus.A

14
VERTICAL VENTING
When vertical single 8-inch (20.32 cm) venting is used (refer to Illus. Bbelow), the ductwork from the dryer to
the outside outlet cannotexceed 55 feet (16.76 meters). 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-sectional area of the ductwork must be increased in proportion to the number of elbows or duct run
added.
IMPORTANT:Forextendedductwork runs, the cross section areaof theduct canonly be increased
toanextent. For extendedductworkruns, a professionalheating, venting, andair
conditioning(HVAC)firmshouldbeconsultedforproperventinginformation.

15
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: Nomore thanfour (4)dryers maximumshould beconnected toone (1) main
commonductwithaverticalrun.
NOTE: Distancebetween dryer singleducts being connectedto themain common duct must bea
minimumof34-1/4”(87cm)dryerwidth.
Ductworkshould be laid out in such a manner where allowancesare madeat reararea of the
dryerfor removalof rear service panels or guards.
The illustrations on page 16 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: Forextended ductworkruns, the cross section area of the duct canonly beincreased
toanextent. For extendedductworkruns, a professionalheating, venting, andair
conditioning(HVAC)firmshouldbeconsultedforproperventinginformation.
Refer to page 16 for Multiple Dryer Horizontal Venting and Vertical Venting examples/illustrations.

16
HORIZONTAL VENTING
Illus. C
VERTICAL VENTING
Illus. D