American Dryer Corp HBG76 User Manual

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HBG76

Installation/Operator Manual

WARNING: For your safety the information in this manual must be followed to minimize the risk of fire or explosion and 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-vousde 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 02720-4781USA

Telephone: +1 (508) 678-9000 /Fax: +1 (508)678-9447

e-mail:techsupport@amdry.com

www.amdry.com

ADC Part No. 113615-1

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.

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. 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.

IMPORTANT

For your convenience, log the following information:

HBG76

DATE OF PURCHASE ________________________________________________ MODEL NO. _____________________

RESELLER’S NAME __________________________________________________________________________________

SERIAL NUMBER(S) __________________________________________________________________________________

____________________________________________________________________________________________________

____________________________________________________________________________________________________

Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement parts from the factory, you can FAX your order to ADC at +1 (508) 678-9447or telephone your order directly to the ADC Parts Department at +1 (508)678-9000.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.

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! WARNING

Proposition 65

Use of this product could expose you to substances from fuel combustion that contain chemicals known to the State of California to cause cancer, birth defects and other reproductive harm.

IMPORTANT

You must disconnect and lockout the electric supply and the gas supply or the steam supply before any covers or guards are removed from the machine to allow access for cleaning, adjusting, installation, or testing of any equipment per OSHA standards.

Please observe all safety precautions displayed on the equipment and/or specified in the installation manual included with the dryer.

Before installation, check that the local distribution conditions, nature of gas and pressure, and adjustment of the appliances are compatible.

CAUTION

Dryer(s) should never be left unattended while in operation.

When discarding or storing your old clothes dryer, remove the door.

Lorsque vous entreposez ou mettez votre sécheuse au rebut, enlevez-enla porte.

“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 erreurs de câblage peuvent entraîner un fonctionnement inadéquat et dangereux.»

WARNING

Children should not be allowed to play on or near the dryer(s). Children should be supervised if near dryer(s) in operation.

Under no circumstances should the dryer door switch(es), lint door/drawer switch(es), or heat safety circuit(s) ever be disabled.

The dryer must never be operated with any of the back guards, outer tops, or service panels removed. Personal injury or fire could result.

The dryer must never be operated without the lint filter/ screen in place, even if an external lint collection system is used.

FOR YOUR SAFETY

Do not dry mop heads in the dryer. Do not use dryer in the presence of dry cleaning fumes.

The dryers must not be installed or stored in an area where it will be exposed to water and/or weather.

The wiring diagram for the dryer is located behind the control panel.

Table of Contents ______

Safety Precautions..........................

4

Specifications .................................

6

Installation Procedures ..................

8

Location Requirements ..................................

8

Unpacking/Setting Up ....................................

8

Dryer Enclosure Requirements ......................

8

Fresh Air Supply Requirements .....................

9

Exhaust Requirements ...................................

9

Electrical Information ...................................

11

Gas Information ...........................................

13

Gas Pressure Testing...................................

15

Steam Information ........................................

15

Water Information ........................................

16

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

17

Preoperational Test ......................................

17

Preoperational Instructions ..........................

17

Shutdown Instructions ..................................

18

Service/Parts Information ............

18

Service .........................................................

18

Parts .............................................................

18

Warranty Information....................

18

Returning Warranty Cards ...........................

18

Warranty ......................................................

18

Returning Warranty Parts ............................

18

Routine Maintenance ....................

19

Data Label Information .................

20

List of Acronyms __________________

HVAC

Heating, Ventilating, and Air-Conditioning

in WC

Inches of Water Column

L.C.D.

Liquid Crystal Display

L.E.D.

Light Emitting Diode

L.P.

Liquid Propane

OSHA

Occupational Safety and Health Administration

R.M.A.

Return Material Authorization

UL

Underwriters Laboratory

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3

Safety Precautions ___________________

Warning

!For your safety, the information in this manual must be followed to minimize the risk of fire or

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

The dryer must never be operated with any of the back guards, outer tops, or service panels removed. Personal injury or fire could result.

Failure to properly install, maintain, and/or operate dryer according to this manual and operator’s manuals included with dryer may result in conditions, which can cause serious injury, death and/or property damage.

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

Purchaser and user should consult the local gas supplier for proper instructions to be followed in the event the user smells gas. The instructions should be posted in a prominent location.

What To Do If You Smell Gas:

Do not try to light any appliance.

Do not touch any electrical switch.

Do not use any phone in your building.

Clear the room, building, or area of all occupants.

Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

Installation and service must be performed by a qualified installer, service agency, or gas supplier.

Dryers must be exhausted to the outdoors.

Although the manufacturer produces a very versatile dryer, there are some articles that, due to fabric composition or cleaning method, should not be dried in it.

Warning

!Dry only water washed fabrics. Do not dry articles spotted or washed in dry cleaning

solvents, combustible detergents, or “all purpose” cleaner. Explosion could result.

Do not dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint, or wax. Explosion could result.

Items that have been spotted or soaked with vegetable or cooking oil constitute a fire hazard and should not be placed in a tumble dryer.

Do not dry mop heads. Contamination by wax or flammable solvents will create a fire hazard.

Do not use heat for drying articles that contain plastic, foam, sponge rubber, or similarly textured rubber materials. Drying in a heated tumbler may damage plastics or rubber and also may be a fire hazard.

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.

Do not operate steam dryers with more than 150 psi (10.34 bar) steam pressure. Excessive steam pressure can damage the steam coil and/or harm personnel.

Replace leaking flexible hoses or other steam fixtures immediately. Do not operate the dryer with leaking flexible hoses. Personal injury may result.

Warning

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

hazard.

For personal safety, the dryer must be electrically grounded in accordance with local and/or country codes. In the absence of these codes use the National Electrical Code ANSI/NFPA NO. 70-LATESTEDITION or in Canada, the Canadian Electrical Codes Parts 1 & 2 CSAC22.1-1990or LATEST EDITION.

Note: Failure to electrically ground the dryer properly will void the warranty.

Warning

!Personal injury or fire could result should the dryer door switch, lint door/drawer, or heat

safety circuit ever be disabled.

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.

For safety, proper operation, and optimum performance, the dryer must not be operated with a load less than 66% of its rated capacity.

Warning

!You must disconnect and lockout the electric supply and the gas supply or the steam supply

before any covers or guards are removed from the machine to allow access for cleaning, adjusting, installation, or testing of any equipment per OSHA standards.

Important: The dryer must be installed in a location/ environment, which the ambient temperature remains between 40° F (4.44° C) and 130° F (54.44° C).

The operation of this appliance may affect the operation of other types of gas appliances, which take their air for safe combustion from the same room. If in doubt, consult the appliance manufacturer(s).

Use this dryer only for its intended purpose, drying fabrics.

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The “Cool Down” Cycle of tumble dryers should be used to reduce the temperature of the items. They should not be removed from the tumble dryer or piled or stacked while hot.

Fabric softeners or similar products should not be used in a tumble dryer to eliminate the effects of the static electricity, unless this practice is specifically recommended by the manufacturer of the fabric softener or product.

Warning

!To reduce the risk of personal injury, install lockable doors to prevent public access to the

rear of the dryers.

Exhaust duct outlet should be checked periodically for blockages, and if any found, removed.

Important: A means of restraint must be used to prevent straining of the gas supply when the appliance is moved.

An external means of power removal (disconnect device) must be provided by the installer.

CE Only

Important: This appliance must only be installed and operated in the country of destination indicated on the dryer’s data plate. If the appliance is to be installed and operated in a country other than the one indicated on the data plate, a data plate amendment must be obtained from American Dryer Corporation.

Warning

!This appliance must only operate with the gas type indicated on the dryer’s data plate. If the

appliance is converted (gas type is changed), a data plate amendment must be obtained from American Dryer Corporation.

This appliance may cause spillage of products of combustion from an open-flueappliance fitted in the same room, and that such an appliance shall be tested for clearance of products with the appliance in operation and all windows and doors closed.

NOTES _____________________________________________________

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5

Specifications _____________________________________________________________________

MAXIMUM CAPACITY (DRY WEIGHT)

 

75 lb

 

34.02 kg

TUMBLER DIAMETER

 

37”

 

93.98 cm

TUMBLER DEPTH

 

 

 

35-1/2”

 

90.17 cm

TUMBLER VOLUME

 

 

 

22.09 cu ft

625.52 L

TUMBLER/DRIVE MOTOR

 

3/4 hp

 

0.56 kW

BLOWER/FAN MOTOR

 

3/4 hp

 

0.56 kW

DOOR OPENING (DIAMETER)

 

27-3/8”

 

69.53 cm

DOOR SILL HEIGHT

 

 

 

27-5/16”

 

69.37 cm

WATER CONNECTION

 

 

3/4”-11.5NH

 

DRYERS PER 20’/40’ CONTAINER

 

 

9 / 20

 

DRYERS PER 48’/53’ TRUCK

 

 

25 / 27

 

 

VOLTAGE AVAILABLE

 

120-240V

2,3w

50/60 Hz

 

APPROXIMATE NET WEIGHT

 

745 lb

 

337.93 kg

Gas

APPROXIMATE SHIPPING WEIGHT

775 lb

 

351.53 kg

AIRFLOW

 

 

60 Hz

640 cfm

 

18.12 cmm

 

 

 

 

50 Hz

533 cfm

 

15.10 cmm

 

 

 

 

 

 

 

HEAT INPUT

 

 

 

130,000 Btu/hr

32.75 kcal/hr

 

EXHAUST CONNECTION (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

 

200-416V

1,3ø

3,4w

50/60 Hz

 

APPROXIMATE NET WEIGHT

 

745 lb

 

337.93 kg

 

APPROXIMATE SHIPPING WEIGHT

775 lb

 

351.53 kg

Electric

AIRFLOW

 

 

60 Hz

600 cfm

 

16.99 cmm

 

 

 

 

50 Hz

500 cfm

 

14.16 cmm

 

 

 

 

 

 

 

EXHAUST CONNECTION (DIAMETER)

8”

 

20.32 cm

 

COMPRESSED AIR CONNECTION

 

N / A

 

 

COMPRESSED AIR VOLUME

 

 

N / A

 

 

 

 

OVEN SIZE

 

 

 

 

 

 

kW

 

Btu/hr

 

kcal/hr

 

 

 

 

 

18.4

 

62,763

 

15,816

 

 

 

 

 

20.2

 

68,975

 

17,381

 

 

 

 

 

20.3

 

69,418

 

17,493

 

 

 

 

 

20.4

 

69,521

 

17,519

 

 

 

 

 

VOLTAGE AVAILABLE

 

120-240V

2,3w

50/60 Hz

 

APPROXIMATE NET WEIGHT

 

745 lb

 

337.93 kg

 

APPROXIMATE SHIPPING WEIGHT

775 lb

 

351.53 kg

Steam

AIRFLOW

 

 

60 Hz

600 cfm

 

16.99 cmm

 

 

 

 

50 Hz

500 cfm

 

14.16 cmm

 

 

 

 

 

 

 

STEAM CONSUMPTION

 

136 lb/hr

61.69 kg/hr

 

OPERATING STEAM PRESSURE

150 psi max

10.34 bar

 

EXHAUST CONNECTION (DIAMETER)

8”

 

20.32 cm

 

COMPRESSED AIR CONNECTION

 

N / A

 

 

COMPRESSED AIR VOLUME

 

 

N / A

 

 

BOILER HORSEPOWER (NORMAL LOAD)

 

4 Bhp

 

 

SUPPLY CONNECTION

 

 

3/4” F.N.P.T.

 

 

RETURN CONNECTION

 

 

3/4” M.N.P.T.

 

Shaded areas are stated in metric equivalents

 

 

 

 

6/17/08

Note: The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

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American Dryer Corp.

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Specifications _____________________________________________________________________

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7

Installation Procedures ______________

Installation should be performed by competent professional in accordance with local, state, and country codes. In the absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1- LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATESTEDITION (National Electrical Code) or in Canada, the installation must conform to applicable Canadian Standards:CAN/CGA-B149.1-M91(Natural Gas) or CAN/CGA-B149.2-M91(L.P. Gas) or LATEST EDITION (for General Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSAC22.1-1990or LATEST EDITION (for Electrical Connections).

Location Requirements ______________

Before installing the dryer, be sure the location conforms to local, state, and country codes. 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).

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.

The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.

Dryers installed in residential garages must be elevated 18-inches(45.72 cm) above the floor.

Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply Requirements section).

Clearance provisions must be made from combustible construction as noted in this manual (refer to Dryer Enclosure Requirements section).

Provisions must be made for adequate clearances for servicing and for operation as noted in this manual (refer to Dryer Enclosure Requirements section).

The dryer must be installed with a proper exhaust duct connection to the outside as noted in this manual (refer to Exhaust Requirements section).

The dryer must be located in an area where correct exhaust venting can be achieved as noted in this manual (refer to Exhaust Requirements section).

Important: The dryer should be located where a minimum amount of exhaust ducting will be necessary.

The dryer must be installed with adequate clearance for air openings into the combustion chamber.

Caution

!This dryer produces combustible lint and must be exhausted to the outdoors. Every 6

months, inspect the exhaust ducting and remove any lint buildup.

Important: The dryer must be installed in a location/ environment, which the ambient temperature remains between 40° F (4.44° C) and 130° F (54.44° C).

Unpacking/Setting Up ________________

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

Important: Dryer must be transported and handled in an upright position at all times.

The dryer can be moved to its final location while still attached to the skid or with the skid removed. To remove the skid locate and remove the 2 bolts securing the base of the dryer to the wooden skid. One is located at the center rear and the other is at the center front.

With the skid removed, use caution and assure all four leveling legs are fully retracted, if the dryer is to be slid into its final position.

Leveling Dryer

The dryer is equipped with 4 leveling legs, 1 at each corner of the base. For optimum performance the dryer should be level front-to-backandside-to-side.

Dryer Enclosure Requirements _______

Commercial Type II

Bulkheads and partitions should be made of noncombustible material.

Note: Allowances must be made for opening the control door.

AThe requirement to allow the door to open completely is 40-inches(101.6 cm).

BA minimum overhead clearance of 6-inches(15.24 cm) is required.

CDryer should be positioned a minimum of 12-inches(30.48 cm) away from the nearest obstruction.24-inches(60.96 cm) is recommended for ease of installation, maintenance, and service.

D1/16” (1.5875 mm) minimum is required.

EFlooring should be level or below dryer cabinet for ease of removing panels during maintenance.

FDryers may be positioned sidewall to sidewall, however a 1/16” (1.5875 mm) minimum allowance must be made for the opening and closing of the control door, along with the removal of panels during maintenance.

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American Dryer Corp.

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Fresh Air Supply Requirements ______

When the dryer is operating, it draws in room air, heats it, passes this air through the tumbler, and exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the make-upair 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. The dryer must be installed with provisions for adequate combustion andmake-upair supply.

Air supply (make-upair) must be given careful consideration to ensure proper performance of each dryer. Fresh air ventilation openings shall not be blocked and/or sealed. As a general rule, an unrestricted air entrance from the outdoors of 135 inch2 (871 cm2) is required for each dryer. (Based on 1 inch2 [6.5 cm2] per 1,000 Btu [252 kcal].)

It is not necessary to have a separate make-upair opening for each dryer. Commonmake-upair openings are acceptable. However, they must be set up in such a manner that themake-upair is distributed equally to all the dryers.

To compensate for the use of registers or louvers used over the openings, this area must be increased by approximately 33%. Make-upair 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 high altitudes or predominantly low pressure areas.

Note: Component failure due to dry cleaning solvent fumes will void the warranty.

A= 16-inches(40.6 cm)

B= 17-inches(43.2 cm)

EXAMPLE: For a bank of four dryers, two unrestricted openings measuring 16-inchesby17-inches(40.6 cm by 43.2 cm) are acceptable.

Important: Make-upair must be free of dry cleaning solvent fumes.Make-upair that is contaminated by dry cleaning solvent fumes will result in irreparable damage to the motors and other dryer components.

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 chamberhi-limitprotector thermostat. The dryer must be installed with a proper exhaust duct connection to the outside.

The dryer shall not be exhausted into any gas vent, chimney, wall, ceiling or concealed space of a building.

Caution

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

Improperly sized or installed exhaust ductwork can create a potential fire hazard.

The ductwork should be laid out in such a way that the ductwork travels as directly as possible to the outdoors with as few turns as possible. There should be a minimum 6-inch(15.24 cm) clearance between the back guard and the first bend in the ductwork for ease of servicing. Single or independent dryer venting is recommended. It is suggested that the use of 90° turns be avoided; use 30° and/or 45° bends instead. The radius of the elbows should preferably be1-1/2times the diameter of the duct. All ductwork should be smooth inside with no projections from sheet metal screws or other obstructions, which will collect lint. When adding ducts, overlap the duct being connected. All ductwork joints must be taped to prevent moisture and lint from escaping into the building. Back draft dampers must be installed in all commonly ducted systems. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic inspection and cleaning of lint from the ductwork.

Important: It is recommended that exhaust or booster fans not be used in the exhaust ductwork system.

Exhaust back pressure measured by a manometer/ magnehelic in the exhaust duct must be no less than 0 and must not exceed 0.6 in WC (1.48 mb).

Note: When the exhaust ductwork passes through a wall, ceiling, or roof made of combustible materials, the opening must be2-inches(5.08 cm) larger than the duct (all the way around). The duct must be centered within this opening.

As per the National Fuel Gas Code, “Exhaust ducts for type 2 clothes dryers shall be constructed of sheet metal or other noncombustible material. Such ducts shall be equivalent in strength and corrosion resistance to ducts made of galvanized sheet steel not less than 26 gauge (0.0195-inches[0.50 mm]) thick.”

The ductwork for this appliance must be suitable for the appliance category in accordance with national installation regulations of the country of destination.

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9

Outside Ductwork Protection

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

Important: Do not use screens, louvers, or caps on the outside opening of the exhaust ductwork.

Single Dryer Venting

Important: For extended ductwork runs, the crosssectional area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits as noted in this manual, a professional HVAC firm should be consulted for proper venting information.

Horizontal Venting

When horizontal dryer venting is used, the length of the ductwork from the dryer to the outside exhaust outlet, must not exceed 20 feet (6.10 meters). The minimum diameter of this ductwork must be at least 8-inches(20.32 cm). Including tumbler/dryer elbow connections or elbows used for outside protection from the weather, no more than 1 elbow should be used in the exhaust duct run. If more than 1 elbow is used, thecross-sectionalarea of the ductwork must be increased.

Vertical Venting

When vertical dryer venting is used, the length of the ductwork from the dryer to the outside exhaust outlet, must not exceed 20 feet (6.10 meters). The minimum diameter of this ductwork must be at least 8-inches(20.32 cm). Including tumbler/dryer elbow connections or elbows used for outside protection from the weather, no more than 3 elbows should be used in the exhaust duct run. If more than 3 elbows are used, the crosssectional area of the ductwork must be increased.

A

=

20 feet (6.10 meters)

C

=

20 feet (6.10 meters)

B

=

8” (20.32 cm)

D

=

8” (20.32 cm)

 

 

 

 

 

 

NOTE 1 Opening from combustible materials must be2-inches(5.08 cm) larger than the duct (all the way around). The duct must be centered within this opening.

NOTE 2 Distance should be 2 times the diameter of the duct to the nearest obstruction.

Multiple Dryer (Common) Venting

Important: For extended ductwork runs, the crosssectional area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits as noted in this manual, a professional HVAC firm should be consulted for proper venting information.

If it is not feasible to provide separate exhaust ducts for each dryer, ducts from individual dryers may be channeled into a “common main duct.” The individual ducts should enter the bottom or side of the main duct at an angle not more than 45º in the direction of airflow. The main duct should be tapered, with the diameter increasing before each individual duct is added.

Important: No more than 4 dryers should be connected to 1 main common duct.

The illustration on the next page shows the minimum crosssectional area for multiple dryer round or square venting. These figures must be increased if the main duct run from the last dryer to where it exhausts to the outdoors is longer than 12 feet (3.656 meters) or has more than 1 elbow in it.

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American Dryer Corp.

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