American Dryer Corp ML-75DII User Manual

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ML-75DII

(Gas/Electric/Steam)

Installation Manual

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 vapor and liquids in the vicinity of this or any other appliance.

WHAT DO YOU 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 dans le voisinage de cet appareil ou de tout autre appareil.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:

*Ne pas tenter d’allumer d’appareil.

*Ne touchez à aucun interrupteur. Ne pas vous servir des téléphones se trouvant dans le bâtiment où vous vous trouvez.

*Évacuez la pièce, le bâtiment ou la zone.

*Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.

*Si vous ne pouvez rejoindre le fournisseur de gaz, appelez le service des incendies.

L’installation et l’entretien doivent être assurés par un installateur ou un service d’entretien qualifié ou par le fournisseur de gaz.

 

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: (508) 678-9000 / Fax: (508) 678-9447

 

E-mail: techsupport@amdry.com

 

www.amdry.com

122299MS/tcosta

ADC Part No. 113122

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.

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

POUR VOTRE SÉCURITÉ

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

Ne pas entreposer ni utiliser d’essence ni d’autres vapeurs ou liquides inflammables dans le voisinage de cet appareil ou de yout 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.

Important

For your convenience, log the following information:

DATE OF PURCHASE ____________________________ MODEL NO.

__________________________________________ML - 75DII

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 (508) 678-9447 or telephone your order directly to the ADC Parts Department at (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.

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

(Occupational Safety and Health Administration) STANDARDS.

“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 fils avant de les déconnecter. Toute erreur de câblage peut étre une source de danger et de panne.»

CAUTION

DRYER(S) SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.

WARNING

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

CHILDREN SHOULD BE SUPERVISED IF NEAR DRYER(S) IN OPERATION.

FOR YOUR SAFETY

DO NOT DRY MOP HEADS IN THE DRYER.

DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.

WARNING

UNDER NO CIRCUMSTANCES should the dryer door switches, lint door switch, heat safety circuit 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 RESULT.

WARNING

DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/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.

Dryer(s) 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.

 

Table of Contents

 

SECTION I

 

IMPORTANT INFORMATION ..........................................................................

3

A. Receiving and Handling ...............................................................................................................

3

B.

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

4

SECTION II

 

SPECIFICATIONS/COMPONENT IDENTIFICATION ..................................

6

A. Specifications .............................................................................................................................

6

B.

Component Identification ............................................................................................................

8

SECTION III

 

INSTALLATION PROCEDURES ....................................................................

10

A. Location Requirements .............................................................................................................

10

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

11

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

12

D. Fresh Air Supply .......................................................................................................................

13

E.

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

14

F.

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

19

G.

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

27

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

30

I.

Preparation For Operation/Start-Up .........................................................................................

35

J.

Preoperational Tests .................................................................................................................

36

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

38

L.

Shut Down Instructions .............................................................................................................

39

SECTION IV

 

SERVICE/PARTS INFORMATION .................................................................

40

A. Service .....................................................................................................................................

40

B. Parts ........................................................................................................................................

40

SECTION V

 

WARRANTY INFORMATION .........................................................................

41

A. Returning Warranty Card(s) ......................................................................................................

41

B. Warranty ..................................................................................................................................

41

C. Returning Warranty Part(s) ........................................................................................................

41

SECTION VI

 

ROUTINE MAINTENANCE ............................................................................

43

A. Cleaning ...................................................................................................................................

43

B. Adjustments .............................................................................................................................

44

C. Lubrication ...............................................................................................................................

44

SECTION VII

 

PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT

 

COMPONENTS ................................................................................................

46

SECTION VIII

 

REVERSING TIMER SPIN/DWELL ADJUSTMENTS ..................................

49

SECTION IX

 

DATA LABEL INFORMATION........................................................................

50

A. Data Label ...............................................................................................................................

50

SECTION X

 

BURNER and BASKET (TUMBLER)/LINT CHAMBER MANUAL RESET

 

HI-LIMIT INSTRUCTIONS .............................................................................

52

Gas Models Only ...........................................................................................................................

52

Electric or Steam Models Only .......................................................................................................

53

SECTION I

IMPORTANT INFORMATION

A. RECEIVING and 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: The basket (tumbler) section of the dryer must be transported and handled in an upright position at ALL times.

3

B. 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.

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 also may be a fire hazard.

4

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 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 do so will VOID THE WARRANTY.

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

WARNING: PERSONAL INJURY or FIRE COULD 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 left in the dryer after the drying and cooling cycles have been completed can create a fire hazard.

12.DO NOT operate steam dryers with more than 125 PSI (8.62 bars) steam pressure. Excessive steam pressure can damage steam coil and/or harm personnel.

13.Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with leaking flexible hoses. PERSONAL INJURY MAY RESULT.

14.The normal PH level for copper type steam coils must be maintained between a value of 8.5 to 9.5. For steel type steam coils the PH level must be maintained between a value of 9.5 to 10.5. These limits are set to limit the acid attack of the steam coils.

IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY.

15.READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.

16.For safety, proper operation, and optimum performance, the dryer must not be operated with a load less than sixty-six percent (66%), 50 pounds (22.67 kg) of its rated capacity.

WARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY or THE STEAM SUPPLYBEFORE 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.

5

SECTION II

SPECIFICATIONS/COMPONENT IDENTIFICATION

A. SPECIFICATIONS

BASKET (TUMBLER) DIAMETER

37”

 

94 cm

 

 

 

 

 

BASKET (TUMBLER) DEPTH

36”

 

91.5 cm

 

 

 

 

 

BASKET (TUMBLER) MOTOR

1 HP*

 

0.746 kw

 

 

 

 

 

DOOR OPENING (DIAMETER)

31-3/8”

 

79.7 cm

 

 

 

 

 

BASKET (TUMBLER) VOLUME

22.4 cu. ft.

 

0.634 cu. m.

 

 

 

 

 

DRYERS PER 20’/40’ CONTAINER

10/20

 

 

 

 

 

 

DRYERS PER 45’/48’ TRUCK

24/24

 

 

 

 

 

 

 

VOLTAGE AVAILABLE

120-460v 1ø-3ø 50/60 Hz

 

 

 

 

 

 

 

APPROX. WEIGHT (UNCRATED)

721 lbs.

 

327 kg

Gas

 

 

 

 

 

 

APPROX. WEIGHT (CRATED)

771 lbs.

 

349.7 kg

 

 

 

 

 

 

 

 

 

 

HEAT INPUT

 

200,000 btu/hr

 

50,400 kcal/hr

 

 

 

 

 

 

 

 

AIRFLOW

 

1,200 cfm

 

33.98 cmm

 

 

 

 

 

 

 

INLET PIPE SIZE

 

3/4” N.P.T.**

 

 

 

 

 

 

 

Electric

VOLTAGE AVAILABLE

208-460v 1ø-3ø

50/60 Hz

 

 

 

 

 

 

 

 

APPROX. WEIGHT (UNCRATED)

721 lbs.

 

327 kg

 

 

 

 

 

 

 

APPROX. WEIGHT (CRATED)

771 lbs.

 

349.7 kg

 

 

 

 

 

 

 

 

AIRFLOW

 

1,200 cfm

 

33.98 cmm

 

 

 

 

 

 

VOLTAGE AVAILABLE

120-460v 1ø-3ø 50/60 Hz

 

 

 

 

 

 

 

APPROX. WEIGHT (UNCRATED)

757 lbs.

 

343.4 kg

 

 

 

 

 

 

 

APPROX. WEIGHT (CRATED)

807 lbs.

 

366.1 kg

 

 

 

 

 

 

 

Steam

AIRFLOW

 

1,350 cfm

 

38.23 cmm

 

 

 

 

 

 

COMPRESSED AIR VOLUME

BOILER HP NORMAL

 

0.02 cmh

 

0.75 cfh

 

 

AIR CONNECTION

1/8” F.P.T.

 

STEAM CONSUMPTION

LOAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

238.7 lbs./hr

 

108.3 kg/hr

7

 

 

 

 

 

 

 

 

 

OPERATING STEAM PRESSURE

STEAM SUPPLY

STEAM RETURN

 

 

 

 

 

 

 

 

125 PSI max

 

8.6 bars

1” F.P.T.

1” F.P.T.

 

 

 

 

 

 

 

Shaded areas are stated in metric equivalents

*For non-reversing models.

**A minimum of 3/4-inch pipe must be supplied to the gas inlet for each dryer.

IMPORTANT: Steam dryers must be provided with clean, dry, and regulated 80 PSI +/- 10 PSI (5.51 bars +/- 0.69 bars) air supply.

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

6

American Dryer Corp ML-75DII User Manual

Specifications

MLG-75D

MLE-75

MLS-75

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

7

B. COMPONENT IDENTIFICATION

1. Dryer Front View

Illus. No. Description

1Controls

2Control (top access) Door Assembly

3Main Door Assembly

4Lint Compartment Area (lint screen located behind door)

5Data Label and Installation Label (located on the left side panel/wall area behind the control door)

8

2. Dryer Rear View

Illus. No. Description

1Heating Unit

21/8-inch Compressed Air Supply Inlet

(behind electric service relay box for steam units Only)

3*

Electric Service Relay Box

4Basket (tumbler) Bearing Mount Assembly

5Idler Bearing Mount Assembly

6Blower Motor Assembly

7Leveling Leg (rear)

8Basket (tumbler) Drive Motor Assembly (reversing models Only)

9Dryer Exhaust

*Electric service connections for gas and steam models are made in this box.

NOTE: 1/8-inch compressed air supply inlet (for steam models only) is located behind the electric service relay box.

9

SECTION III

INSTALLATION PROCEDURES

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 applicable American National Standards: ANSI Z223.1- LATEST 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 & 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: “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 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).

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 ad 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.

10

IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be necessary.

B. UNPACKING/SETTING UP

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

IMPORTANT: For microprocessor controller (computer) models, this wooden block must be removed before connecting power to the dryer or irreparable damage to the basket (tumbler) will result.

The lint coops of ALL ML-75 dryers are supported during shipping by a bracket. REMOVE THIS BRACKET BEFORE STARTING THE DRYER.

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.

11

C. DRYER ENCLOSURE REQUIREMENTS

Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of 12inches (30.48 cm), 18-inches (45.72 cm) or more is recommended for ease of installation, maintenance, and service above the dryer outer top, except along the front of the dryer which may be partially closed in if desired. 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 front. The bulkhead facing must not be closed in ALL the way to the top of the dryer. A 1-inch (2.54 cm) clearance is required.

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

Dryers may be positioned sidewall to sidewall. However, a 1/16-inch (1.5875 mm) minimum allowance must be made for the opening and closing of the control door and the lint door. It is suggested that the dryer be positioned about 30-inches (76.2 cm) 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.

NOTE: Air considerations are important for proper and efficient operation.

IMPORTANT: For overhead clearance, even though a minimum of only 12-inches (30.48 cm) is required, 18-inches (45.72 cm) or more is suggested. The additional clearance is advantageous for ease of installation and service.

IMPORTANT: When fire sprinkler systems are located above the dryers, a minimum of 18-inches (45.72 cm) above the dryer console (module) is required. Dryers may be positioned sidewall to sidewall however, a 1/16-inch (1.5875 mm) minimum allowance is required between dryers (or wall) for ease of installation and maintenance. Allowances must be made for the opening and closing of the control door and the lint door.

12

D. FRESH AIR SUPPLY

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 must be continually 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 1,200 cfm (cubic feet per minute) - 33.98 cmm (cubic meters per minute) - must be supplied to each gas and electric dryer and 1,350 cfm (38.23 cmm) must be supplied to 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.

To compensate for the use of registers or louvers used over the openings, this make-up air 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 four (4) dryers, two (2) unrestricted openings measuring 2 feet by 1-1/2 feet (0.61 meters by 0.45 meters), 6 square feet (0.56 square meters) is acceptable.

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.

13

E. EXHAUST REQUIREMENTS

1.General Exhaust Ductwork Information

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

CAUTION: DRYER MUST BE EXHAUSTED TO THE OUTDOORS.

CAUTION: 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. Single or independent dryer venting is recommended.

Horizontal Venting:

When single dryer venting is used, the length of ductwork from the dryer to the outside exhaust outlet, must not exceed 15 feet (4.6 meters). The minimum diameter of this ductwork must be at least 10-inches (25.4 cm). In the case of multiple (common) dryer venting, the distance from the last dryer to the outside exhaust outlet must not exceed 15 feet (4.6 meters). The shape of the ductwork is not critical so long as the minimum cross-sectional area is provided. It is suggested that the use of 90° turns be avoided; use 30° and/ or 45° angles instead. The radius of the elbows should preferably be 1-1/2 times the diameter of the duct. Including 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-sectional area of the ductwork must be increased. ALL ductwork should be smooth inside with no projections from sheet metal screws or other obstructions, which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be connected. ALL ductwork joints must be taped to prevent moisture and lint from escaping into the building. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic inspection and cleaning of lint from the ductwork.

Vertical Venting:

When single dryer venting is used, the length of the ductwork from the dryer to the outside exhaust outlet must not exceed 20 feet (6.1 meters). The minimum diameter of this ductwork must be at least 12-inches (30.48 cm) even though the dryer exhaust duct for gas and electric units is only 10-inches (25.4 cm). In the case of multiple (common) dryer venting, the distance from the last dryer to the outside exhaust outlet should not exceed 20 feet (6.1 meters). The shape of the ductwork is not so critical so long as the minimum cross-sectional area is provided. It is suggested that the use of 90º turns be avoided; use 30º and/ or 45º bends instead. The radius of the elbows should preferably be 1-1/2 times 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, the duct to be added should overlap the duct to which it is to be connected. ALL ductwork joints must be taped to prevent moisture and lint from escaping into the building. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic inspection and cleaning of lint from the ductwork.

IMPORTANT: Exhaust back pressure measured by a manometer in the exhaust duct must not exceed 0.3 inches (0.74 mb) of water column (W.C.).

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