American Dryer AD-60 Parts Diagram

AD-60 Installation Manual

Phase 7

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.

— WHA T 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 .

A VERTISSEMENT : 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.

— QUE FAIRE SI VOUS SENTEZ UNE

ODEUR 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.

American Dryer Corporation

88 Currant Road

Fall River MA 02720-4781 USA

T elephone: [phone] / Fax: [phone]

e-mail: techsupport@amdry .com

www.amdry.com

ADC Part No. 1 13238

Retain This Manual in a Safe Place for Future Reference

This product embodies advanced concepts in engineering, design, and safety. If this product is properly
maintained, it will provide many years of safe, efficient, and trouble free operation.

Only qualified technicians should service this equipment.
OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation

manual included with the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.

FOR YOUR SAFETY

Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.

We have tried to make this manual as complete as possible and hope you will find it useful. The manufacturer
reserves the right to make changes from time to time, without notice or obligation, in prices, specifications,
colors, and material, and to change or discontinue models. The illustrations included in this manual may not
depict your particular dryer exactly .

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.

IMPORTANT

For your convenience, log the following information:

DA TE OF PURCHASE ____________________________________________ MODEL NO. _______________________________

RESELLER’S NAME _______________________________________________________________________________________

AD-60 Phase 7

Serial Number(s) _________________________________________________________________________________________

_______________________________________________________________________________________________________

_______________________________________________________________________________________________________

Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement p arts
from the factory, you can FAX your order to ADC at [phone] or telephone your order directly to the
ADC Parts Department at [phone]. Please specify the dryer model number and serial number in
addition to the description and part number, so that your order is processed accurately and promptly.

“IMPORTANT NOTE TO PURCHASER”

Information must be obtained from your local gas supplier on the
instructions to be followed if the user smells gas. These instructions
must be posted in a prominent location near the dryer .

IMPORTANT

YOU MUST DISCONNECT AND LOCK OUT THE ELECTRIC SUPPLY AND THE GAS
SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, OR TESTING OF ANY EQUIPMENT PER OSHA

(Occupational Safety and Health Administration) STANDARDS.

«Attention: Lor des opérations d’entretien
“Caution: Label all wires prior to
disconnection when servicing controls. W iring
errors can cause improper operation.”

des commandes étiqueter tous fils avant

de les déconnecter. Toute erreur de

câblage peut étre une source de danger et

de panne.»

CAUTION

DR YERS SHOULD NEVER BE LEFT UNA TTENDED WHILE IN OPERA TION.

WARNING

CHILDREN SHOULD NOT BE ALLOWED TO PLA Y ON OR NEAR THE DRYER(S).
CHILDREN

SHOULD BE SUPER VISED IF NEAR DRYERS IN OPERA TION.

FOR YOUR SAFETY

DO NOT DR Y MOP HEADS IN THE DRYER.
DO NOT USE DR YER IN THE PRESENCE OF DR Y CLEANING FUMES.

WARNING

UNDER NO CIRCUMSTANCES should the dryer door switch or the heat circuit devices
ever be disabled.

WARNING

The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY OR FIRE COULD RESUL T .

WARNING

DRYER MUST NEVER BE OPERA TED WITHOUT THE LINT FIL TER/SCREEN IN
PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.

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

The wiring diagram for the dryer is located in the front electrical control box area.

will be exposed to water or weather.

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

SAFETY PRECAUTIONS ................................................................................................... 3

SECTION II

SPECIFICATIONS............................................................................................................... 5

SECTION III

INSTALLATION PROCEDURES ..................................................................................... 7

A. Unpacking/Setting Up ............................................................................................................................. 7

B. Location Requirements ........................................................................................................................... 8

C. Dryer Enclosure Requirements ................................................................................................................ 9

D. Fresh Air Supply Requirements ............................................................................................................. 10

E. Exhaust Requirements ........................................................................................................................... 11

F. Electrical Information ............................................................................................................................ 17

G . Gas Information .................................................................................................................................... 22

H. Steam Information ................................................................................................................................26

I. Preparation for Operation/Start-Up....................................................................................................... 31

J. Preoperational T ests ............................................................................................................................. 32

K. Preoperational Instructions .................................................................................................................... 33

L. Shutdown Instructions........................................................................................................................... 35

SECTION IV

SERVICE/PARTS INFORMATION ................................................................................ 3 6

A. Service................................................................................................................................................ 36

B. Parts .................................................................................................................................................... 36

SECTION V

WARRANTY INFORMATION......................................................................................... 37

A. Returning W arranty Cards..................................................................................................................... 37

B. Warranty .............................................................................................................................................. 37

C. Returning Warranty Parts ...................................................................................................................... 37

SECTION VI

ROUTINE MAINTENANCE ............................................................................................ 39

A. Cleaning ............................................................................................................................................... 39

B. Adjustments ......................................................................................................................................... 40

C. Lubrication ........................................................................................................................................... 40

SECTION VII

DATA LABEL INFORMATION ....................................................................................... 4 1

SECTION VIII
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT

COMPONENTS.................................................................................................................. 43

SECTION IX

MANUAL RESET BURNER HI-LIMIT INSTRUCTIONS ......................................... 4 6

A. Phase 7 ................................................................................................................................................ 46

B. Dual T imer ............................................................................................................................................ 46

SECTION X

SENSOR ACTIVATED FIRE EXTINGUISHING (S.A.F.E.) SYSTEM ..................... 4 7

SECTION I

SAFETY PRECAUTIONS

WARNING: For your safety, the information in this manual must be followed to minimize the risk of

fire or explosion or to prevent property damage, personal injury, or loss of life.

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.

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 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. 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. DO NOT dry articles spotted or washed in dry

cleaning solvents, a combustible detergent, or “all purpose” cleaner.

EXPLOSION COULD RESULT.

WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,

or wax. EXPLOSION COULD RESULT.

WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a

fire hazard.

3

WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or

similarly textured rubber materials. Drying in a heated basket (tumbler) may damage
plastics or rubber and may be a fire hazard.

7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust ductwork,
and area around the back of the dryer. The frequency of inspection and cleaning can best be determined
from experience at each location.

WARNING: The collection of lint in the burner area and exhaust ductwork can create a potential fire

hazard.

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: Failure to electrically ground the dryer properly will VOID THE WARRANTY.

9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety
circuit ever be disabled.

WARNING: PERSONAL INJURY OR FIRE COULD RESULT should the dryer door switch,

lint door switch, or heat safety circuit ever be disabled.

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 left in the dryer after the drying and cooling cycles have been completed can

create a 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%), 40 lbs (18 kg) of its rated capacity.

WARNING: YOU MUST DISCONNECT AND LOCK OUT THE ELECTRIC SUPPLY

AND THE GAS SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS
OR GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW
ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, OR TESTING OF
ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration)
STANDARDS.

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).

4

SECTION II

SPECIFICATIONS

MAXIMUM CAPACITY (DRY WEIGHT) 60 lbs
BASKET (TUMBLER) DIAMETER 37”
BASKET (TUMBLER) DEPTH 30”
BASKET (TUMBLER) MOTOR 3/4 hp*
DOOR OPENING (DIAMETER) 31-3/8”
BASKET (TUMBLER) VOLUME 18.67 cu ft
DRYERS PER 20'/40' CONTAINER 10/20
DRYERS PER 48'/53' TRUCK 24/26
S.A.F.E. WATER CONNECTION 3/4-11.5 NH

VOLTAGE AVAILABLE 100-480v 1,3ø 2,3,4w 50/60Hz
APPROX. NET WEIGHT 595 lbs
APPROX. SHIPPING WEIGHT 645 lbs
HEAT INPUT 160,000 Btu/hr

GasElectricSteam***

AIRFLOW 600 cfm
INLET PIPE CONNECTION 1/2” M.N.P.T.

OVEN SIZE

kW Btu/hr

20 68,250
24 81,900

30 102,400
VOLTAGE AVAILABLE 100-480v 1,3ø 2,3,4w 50/60Hz
APPROX. NET WEIGHT 625 lbs
APPROX. SHIPPING WEIGHT 675 lbs
AIRFLOW 600 cfm
COMPRESSED AIR VOLUME 0.75 cfh
STEAM CONSUMPTION 144.7 lbs/hr
OPERATING STEAM PRESSURE 125 psi max
BOILER HP NORMAL LOAD 4.2
AIR CONNECTION 1/8” F.N.P.T.
SUPPLY CONNECTION 1” F.N.P.T.**
RETURN CONNECTION 1” F.N.P.T.**

Shaded areas are stated in metric equivalents. 1/7/04

* Single-phase (1ø) dryers use a 3/4 hp (0.56 kW) motor. 3-phase (3ø) non-reversing dryers use a 1/2 hp (0.37 kW) motor. ALL reversing dryers are

supplied with two (2) 3-phase (3ø) motors standard: a 1/2 hp (0.37 kW) blower motor and a 1/2 hp (0.37 kW) drive motor.
** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
*** Specify air-operated or electromechanical steam damper system when ordering. Air-operated steam damper must be provided with a clean, dry, and

regulated 80 psi +/- 10 psi (5.51 bar +/- 0.69 bar) air supply.

kcal/hr

17,200
20,640
25,800

25 kg

94 cm

76.2 cm

0.56 kW

79.7 cm

0.528 cu m

269.9 kg

292.6 kg

40,320 kcal/hr

17 cmm

283.5 kg

306.2 kg
17 cmm

0.02 cmh

65.7 kg/hr

8.6 bar

NOTE: ADC reserves the right to make changes in specifications at any time without notice or

obligation.

5

Specifications

NOTE: ADC reserves the right to make changes in specifications at any time without notice or

obligation.

6

SECTION III

INSTALLATION PROCEDURES

Installation should be performed by competent technicians in accordance to local and state codes. In the
absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1­LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electrical
Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-M91
(Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION (for General
Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 and 2 CSA C22.1-1990 or LATEST EDITION
(for Electrical Connections).

A. UNPACKING/SETTING UP

Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.

IMPORTANT: Dryer must be transported and handled in an upright position at ALL times.

NOTE: For non-coin dryer models equipped with locks, the lock used is a dummy lock and no key is

supplied or needed. The lock can be turned with any key, a screwdriver, a small coin, or any
small sharp object. For coin-operated dryers, the MK-100 (master key for both the control
door and lint door) should be made accessible because it will be needed throughout various
phases in the installation of the dryer.

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.

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.

7

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 to 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: “The dryer must be installed on noncombustible floors 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 noncombustible 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 should be located where a minimum amount of exhaust duct will be 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 dryer produces combustible lint and must be exhausted to the outdoors. Every

6 months, inspect the exhaust ducting and remove any lint build up.

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).

8

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: Allowances must be made for opening the 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: Air considerations are important for proper and efficient operation.

Dryers may be positioned sidewall to sidewall. However, a 1/16-inch (1.5875 mm) minimum allowance must be
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.

9

D. FRESH AIR SUPPLY REQUIREMENTS

Air supply (make-up air) must be given careful consideration to ensure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 600 cfm (cubic feet per minute)
(17 cmm [cubic meters per minute]) must be supplied to each gas and each steam 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 2 feet by 3 feet

(0.61 meters by 0.91 meters) (6 square feet [0.56 square meters]) is acceptable.

IMPORTANT: Make-up air openings should not be located in an area directly near where exhaust

vents exit the building.

Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.

IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes.

Make-up air that is contaminated by dry cleaning solvent fumes will result in
irreparable damage to the motors and other dryer components.

NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.

10

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-limit, or lint chamber hi-limit protector thermostat. The dryer must

be installed with a proper exhaust duct connection to the outside.

CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors.

When possible, it is suggested to provide a separate (single) exhaust duct for each dryer.

CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN

CREATE A POTENTIAL FIRE HAZARD.

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
section area is provided. Single or independent dryer venting is recommended.

is not critical as long as the minimum cross

It is suggested that the use of 90° turns

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.

be avoided; use 30° or 45° angles instead.

IMPORTANT: When connecting ductwork to the dryer exhaust duct, be sure that when screws are

used they DO NOT restrict the operation (both opening and closing) of the damper.

NOTE: When the exhaust ductwork passes through a wall, ceiling, or roof made of combustible

materials, the opening must be 2-inches (5.08 cm) larger than the duct (all the way around).
The duct must be centered within this opening.

To protect the outside end of the horizontal ductwork from the weather, a 90° elbow bent downward should be
installed where the exhaust exits the building. If the ductwork travels vertically up through the roof, it should be
protected from the weather by using a 180° turn to point the opening downward. In either case, allow at least
twice the diameter of the duct between the duct opening and the nearest obstruction (i.e., roof or ground level).

IMPORTANT: DO NOT use screens, louvers, or caps on the outside opening of the exhaust

ductwork.

IMPORTANT: Exhaust back pressure measured by a manometer at the dryer exhaust duct area must

be no less than 0 and must not exceed 0.3 inches (0.74 mb) of water column (W.C.).

IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust ductwork

system.

NOTE: As per the National Fuel Gas Code, “Exhaust ducts for Type 2 clothes dryers shall be

constructed of sheet metal or other noncombustible material. Such ducts shall be equivalent in
strength and corrosion resistance to ducts made of galvanized sheet steel not less than 26
gauge (0.0195-inches [0.05 mm]) thick.”

11

SINGLE DRYER VENTING

IMPORTANT: For exhaust duct runs over 30 feet (9.14 meters) or if additional elbows are used; a

minimum size of 10-inch (25.4 cm) duct must be used.

HORIZONTAL VENTING

For horizontal single venting, an 8-inch (20.32 cm) minimum duct must be used, the ductwork to the outlet
cannot exceed 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

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 ductwork runs, the cross section area of the duct can only be increased

to an extent. For extended ductwork runs, a professional heating, ventilating, and
air-conditioning (HVAC) firm should be consulted for proper venting information.

12

VERTICAL VENTING

For vertical single venting, a minimum of 10-inch (25.4 cm) venting must be used (refer to Illus. B below). The
ductwork from the dryer to the outside outlet
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.

cannot exceed 60 feet (18.29 meters) refer to Illus. B below.

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 ductwork runs, the cross section area of the duct can only be increased

to an extent. For extended ductwork runs, a professional heating, ventilating, and
air-conditioning (HVAC) firm should be consulted for proper venting information.

IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust ductwork

system.

13

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 as 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 than four (4) dryers maximum should be connected to one (1) main

common duct with a vertical run.

NOTE: Distance between dryer single ducts being connected to the main common duct must be a

minimum of 38-1/4” (97.16 cm) dryer width.

Ductwork should be laid out in such a manner where allowances are made at rear area of the
dryer for removal of rear service panels or guards.

The illustrations on page 15 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 ductwork runs, the cross section area of the duct can only be increased

to an extent. For extended ductwork runs, a professional heating, ventilating, and
air-conditioning (HVAC) firm should be consulted for proper venting information.

Refer to page 15 for Multiple Dryer Horizontal Venting and Vertical Venting examples/illustrations.

IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust ductwork

system.

14