American Dryer Corp. AD-120ES II User manual

ADC Part No. 113313
For replacement parts, contact the reseller from which the dryer
was purchased or
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781
Telephone: [phone] / Fax: [phone]
E-mail: [email protected]
www.amdry.com
WARNING: For your safety the
information in this manual must be
followed to minimize the risk of fire or
explosion or to prevent property damage,
personal injury or death.
Do not store or use gasoline or other flammable
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.
AD-120ES II
(Extended Side Panels)
Installation Manual
122900DX/calbert

Retain This Manual In A Safe Place For Future Reference
American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is
properly maintained, it will provide many years of safe, efficient, and trouble-free operation.
ONLY qualified technicians should service this equipment.
OBSERVEALLSAFETYPRECAUTIONS displayed on the equipment or specified in the installation manual included with
the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
AD-120ES II
“IMPORTANT NOTE TO PURCHASER”
Information must beobtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions must be posted in a
prominent location near the dryer.
FOR YOUR SAFETY
Do not store or use gasoline or
other flammable vapors or
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 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. The illustrations included in this manual may not depict your particular dryer exactly.
Important
For your convenience, log the following information:
DATE OF PURCHASE________________________________ MODELNO. __________________________________________
RESELLER’S NAME ________________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Replacement parts can be obtained from your reseller or theADCfactory. When orderingreplacement partsfromthefactory,
you can FAX your order to ADC at [phone] or telephone your order directly to the ADC Parts Department at (508)
678-9000. Please specify the dryer model number andserialnumberin addition to the description andpart number,sothat
your order is processed accurately and promptly.

IMPORTANT
YOUMUSTDISCONNECTANDLOCKOUTTHEELECTRICSUPPLY ANDTHEGAS
SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, OR TESTING OF ANY EQUIPMENT PER OSHA
(Occupational Safety and Health Administration)STANDARDS.
CHILDREN SHOULD NOTBEALLOWED TO PLAY ON OR NEAR THE DRYER(S).
WARNING
CHILDREN SHOULD BESUPERVISED IF NEAR DRYERS IN OPERATION.
DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.
CAUTION
FOR YOUR SAFETY
DO NOT DRY MOP HEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.
WARNING
UNDERNOCIRCUMSTANCESshouldthedryerdoorswitch,lintdrawerswitch,heat
safety circuits ever be disabled.
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
«Attention: Lordesopérationsd’entretien
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»

WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY OR FIRE COULD RESULT.
IMPORTANT
PLEASE OBSERVEALLSAFETY PRECAUTIONS displayedon the equipmentand/or
specified in the installation manual included with the dryer.
WARNING
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN
PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
Dryersmust not beinstalled or stored in an area where itwillbe exposedto waterorweather.
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 .................................................................................................. 14
D. Fresh Air Supply Requirements ................................................................................................. 15
E. Exhaust Requirements ............................................................................................................... 16
F. Electrical Information ................................................................................................................ 22
G. Gas Information........................................................................................................................ 28
H. Steam Information .................................................................................................................... 32
I. Preparation For Operation........................................................................................................ 36
J. Preoperational Tests ................................................................................................................. 37
K. Shut Down Instructions ............................................................................................................. 39
L. Operating Instructions ............................................................................................................... 40
SECTION IV
SERVICE/PARTS INFORMATION .................................................................41
A. Service ..................................................................................................................................... 41
B. Parts ........................................................................................................................................ 41
SECTION V
WARRANTY INFORMATION .........................................................................42
A. Returning Warranty Cards......................................................................................................... 42
B. Warranty .................................................................................................................................. 42
C. Returning Warranty Parts .......................................................................................................... 42

SECTION VI
ROUTINE MAINTENANCE ............................................................................44
A. Cleaning ................................................................................................................................... 44
B. Adjustments ............................................................................................................................. 46
C. Lubrication ............................................................................................................................... 46
SECTION VII
TROUBLESHOOTING.....................................................................................47
Microprocessor Controller (Computer) Models ...................................................................................47
Timer Models ...................................................................................................................................53
SECTION VIII
DATA LABEL INFORMATION........................................................................58
A. Data Label ............................................................................................................................... 58
SECTION IX
REVERSING TIMER SPIN/DWELL ADJUSTMENTS..................................60
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS ................................................................................................61
SECTION XI
BURNER AND BASKET (TUMBLER)/LINT CHAMBER MANUAL RESET
HI-LIMIT INSTRUCTIONS .............................................................................64
Gas Models Only ..............................................................................................................................64
Electric or Steam Models Only ..........................................................................................................65

3
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 theADC Traffic Manager at [phone].
IMPORTANT: The dryer must be transported and handled in an upright position at ALLtimes.

4
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 ALLoccupants.
e. Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
f. If you cannot reach your gas supplier, call the fire department.
4. Installation and service must be performed by a qualified installer, service agency, or gas supplier.
5. Dryer(s) must be exhausted to the outdoors.
6. Although ADC produces a very versatile dryer, there are some articles that, due to fabric composition
or cleaning method, should not be dried in it.
WARNING: Dry only water washed fabrics. 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.

5
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 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 switch, lint drawer switch, heat safety circuits
ever be disabled.
WARNING: PERSONALINJURY 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 (8.61 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. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE
DRYER.
15. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%), 79 lbs (36 kg) 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 (Occupational Safety and Health Administration)
STANDARDS.

6
MAXIMUM CAPACITY (DRY WEIGHT) 120 lbs. 54.4 kg
BASKET (TUMBLER) DIAMETER 44-1/2” 113 cm
BASKET (TUMBLER) DEPTH 42-1/2” 107.9 cm
BASKET (TUMBLER) MOTOR 3/4 HP 0.560 kw
BLOWER MOTOR 3 HP 2.238 kw
DOOR OPENING (DIAMETER) 31-3/8” 79.7 cm
BASKET (TUMBLER) VOLUME 38.2 cu. ft. 1.08 cu. m.
DRYERS PER 20'/40' CONTAINER 3/7
DRYERS PER 45'/48' TRUCK 9/9
VOLTAGE AVAILABLE 208-575v 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 1,349 lbs. 611.9 kg
APPROX. WEIGHT (CRATED) 1,489 lbs. 675.4 kg
HEAT INPUT 375,000 btu/hr 94,500 kcal/hr
AIRFLOW 2,150 cfm 60.88 cmm
INLET SIZE 1”
VOLTAGE AVAILABLE 208-575v 3ø 3, 4w 50/60 Hz
OVEN SIZE
kw btu/hr kcal/hr AIRFLOW
72 246,000 61,900 2,150 cfm 60.88 cmm
VOLTAGE AVAILABLE 208-575v 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 1,650 lbs. 748.4 kg
APPROX. WEIGHT (CRATED) 1,790 lbs. 811.9 kg
HEAT INPUT 13 Bhp
STEAM CONSUMPTION 450 lbs./hr 204 kg/hr
AIRFLOW 2,150 cfm 60.88 cmm
SUPPLY CONNECTION 1-1/4”
RETURN CONNECTION 1-1/4”
COMPRESSED AIR CONNECTION 1/8” F.P.T.
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
Shaded areas are stated in metric equivalents
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. SPECIFICATIONS
IMPORTANT: Steam dryers must be provided with a clean, dry, and regulated 80 PSI +/- 10 PSI
(5.51 bars +/- 0.68 bars) air supply.
NOTE: ADCreserves the right to make changes in specifications at any time without notice or
obligation.
Gas
Electric
Steam

7
NOTE: ADCreserves the right to make changes in specifications at any time without notice or
obligation.
NOTE:Operating height of steam dryer is 89-inches (226.1 cm).
EXHAUST
DUCTDIA.DIM. "A" DIM. "B"
GASAND
ELECTRIC
14"
35.5 cm 11-1/4" 28.6 cm 9-1/2" 24.1 cm
STEAM16"
40.6 cm 9" 22.9 cm 9" 22.9 cm
Specifications
ADG-120ES II
ADE-120ES II
ADS-120ES II

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

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

10
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 toapplicableAmerican NationalStandards: 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
codesorordinances the locationmust conform withtheNationalFuelGasCodeANSI.Z223.1LATESTEDITION,
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
Requirements in Section D).
5. Clearance provisions must be made from combustible construction as noted in this manual (refer to
Dryer Enclosure Requirements in Section C).
6. Provisions must be made for adequate clearances for servicing and for operation as noted in this manual
(refer to Dryer Enclosure Requirements in Section C).
7. Dryer must be exhausted to the outdoors as noted in this manual (refer to Exhaust Requirements
Section E).
8. Dryer must be located in an area where correct exhaust venting can be achieved as noted in this manual
(refer to Exhaust Requirements in Section E).
IMPORTANT: 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.

11
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.
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 un-skid
the dryer, locate and remove the four (4) lag bolts securing the base of the dryer to the wooden skid. Two (2) are
located at the rear base (remove the back panel for access) and two (2) are located in the bottom of the lint
chamber. To remove the two (2) lag bolts located in the lint chamber area, remove the lint drawer and the three
(3) Phillips head screws securing lint door in place.
1. Leveling Dryer
a. To level dryer, place 4-inch (10.16 cm) square metal shims (refer to illustration above) or other
suitable material under the base pads. It is suggested that the dryer be tilted slightly to the rear.

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

13
3. Exhaust Transition Piece (Gas and Electric Only!)
a. Inside the basket (tumbler) of this dryer is an
exhaust transition piece that must be installed on
the outlet of the exhaust before any further venting
is connected:
1) Remove the exhaust transition piece from the
basket (tumbler) and place it on the exhaust
outlet.
2) Using the screws provided, secure the exhaust
transition piece to the dryer.
NOTE: It is recommendedthat this joint be taped
as well as ALL other duct joints to prevent
moisture and lint from escaping into the
building.
WARNING
Anexhaustducttransitionpieceisshippedinsideofthedryer’s
tumbler and must be installed on the dryer’s
exhaust duct, with the hardware provided, BEFORE
location venting is connected to the dryer.
THIS EXHAUST DUCT TRANSITION PIECE
MUST BE INSTALLED FIRST!
Failure to observe this installation requirement may result in
damage to the dryer, create aFIRE HAZARD and will VOID
the manufacturer’s warranty.
012999JEV-GS/cj P/N: 114092

14
C. DRYER ENCLOSURE REQUIREMENTS
Even though a 12-inch (30.48 cm) clearance is acceptable, it is recommended that the rear of the dryer be
positioned approximately 2 feet (0.60 meters) from the nearest obstruction (i.e., wall) for ease of installation,
maintenance, and service. Bulkheads and partitions should be made from noncombustible materials. The
clearance between the bulkhead header and the dryer must be a minimum of 4-inches
(10.16 cm) and must not extend more than 4-inches (10.16 cm) to the rear of the dryer front. The bulkhead
facing must not be closed in ALL the way to the top of the dryer. A 2-inch (5.08 cm) clearance is required.
NOTE: Bulkhead facing should not be installed until after dryer is in place. Ceiling area must be
located a minimum of 12-inches (30.48 cm) above the top of the dryer.
IMPORTANT: Even though a minimum of only 12-inches (30.48 cm) is required, 18-inches
(45.72 cm) or more is suggested, for steam dryers and especially in cases where
sprinkler heads are over the dryers.
NOTE: When fire sprinkler systems are located above the dryers, a minimum of 18-inches (45.72 cm)
above the dryer console (module) is suggested. Dryers may be positioned sidewall to sidewall
however, 1 or 2-inches (2.54 cm or 5.08 cm) is suggested between dryers (or wall) for ease
of installation and maintenance. Allowances must be made for the opening and closing of the
control and lint doors.

15
D. FRESH AIR SUPPLY REQUIREMENTS
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 airmust 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 2,150 cfm (cubic feet per minute) - 60.88
cmm (cubic meters per minutes) -must be supplied to each gas, electric, and steam dryer. As a general rule, an
unrestricted air entrance from the outdoors (atmosphere) of a minimum of 3 square feet (0.28 square meters) is
required for each gas, electric, and steam dryer.
To compensate for the use of registers or louvers used over the openings, this make-up air area must be
increased by approximately thirty-three percent (33%). Make-up air openings should not be located in an area
directly near where exhaust vents exit the building.
It is not necessary to have a separate make-up air opening for each dryer. Common make-up air openings are
acceptable. However, they must be set up in such a manner that the make-up air is distributed equally to ALL
the dryers. The dryer must be installed with provisions for adequate combustion and make-up air supply.
EXAMPLE: For a bank of six (6) gas dryers, two (2) openings measuring 3 feet by 3 feet (0.91
meters by 0.91 meters) 9 square feet (0.84 square meters) is acceptable.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.

16
IMPORTANT: Make-up 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.
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 EXHAUSTDUCTWORKCAN
CREATE APOTENTIALFIREHAZARD.
NOTE: When a dryer is exhausted separately, it is recommendedthat a back draft damper be
installed.
NOTE: When dryers are exhausted into a multiple (common) exhaust line, each dryer must be
supplied with a back draft damper.
The exhaust ductwork should be laid out in such a way that the ductwork travels as directly as possible to
the outdoors with as few turns as possible. Single or independent dryer venting is recommended. When
single dryer venting is used, the ductwork from the dryer to the outside exhaust outletmust not exceed20
feet (6.09 meters). In the case of multiple (common) dryer venting, the distance from the last dryer to the
outside exhaust outletmust not exceed20 feet (6.09 meters). The shape of the ductwork is not critical so
long as the minimum cross section area is provided. It is suggested that the use of 90º turns in ducting be
avoided; use 30º and/or 45º angles instead. The radius of the elbows should preferably be 1-1/2 times the
diameter of the duct. Excluding basket (tumbler)/dryer elbow connections or elbows used for outside
protection from the weather, no more than two (2) elbows should be used in the exhaust duct run. If more
than two (2) elbows are used, the cross section area of the ductwork must be increased in proportion to
number of elbows added.