American Dryer Corp. AD-530HS Administrator Guide

ADC Part No. 112179
AD-530HS/WDA-530
Microprocessor Controls
Gas (Hot Surface Ignition)
Installation/Operator's Manual
For replacement parts, contact the distributor from which the dryer
was purchased or
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781
Telephone: [phone] / Fax: [phone]
E-mail: [e-mail]
110196
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.

Retain This Manual In ASafe Place For Future Reference
Replacement parts can be obtained from your distributor or the ADC factory. When ordering replacement parts from the
factory, you can FAX your order to ADC at [phone] or telephone your orders directly to the ADC Parts Department at
[phone]. Please specify the dryer model number and serial number in addition to the description and part number, so
that your order is processed accurately and promptly.
The illustrations on the following pages may not depict your particular dryer exactly. The illustrations are a composite of the
various dryer models. Be sure to check the descriptions of the parts thoroughly before ordering.
DATE OF PURCHASE MODEL NO.
DISTRIBUTORS NAME
Serial Number(s)
AD-530HS/WDA-530
“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.
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/operator's 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 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.
Important
For your convenience, log the following information:

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 ALLOWACCESS FOR CLEANING,ADJUST-
ING, INSTALLATION, or TESTING OFANY EQUIPMENT per OSHA (Occupational
Safety and HealthAdministration) STANDARDS.
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYERS.
WARNING
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERATION.
DRYERS SHOULD NEVER BE LEFT UNATTENDEDWHILE IN OPERATION.
CAUTION
FOR YOUR SAFETY
DO NOT DRY MOPHEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRYCLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices
ever be disabled.
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
«Attention: Lor des opérations d’entretien
des commandes étiqueter tous 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 OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or
specified in the installation/operator's manual included with the dryer.
Dryers must not be installed or stored in an area where it will be exposed to water or weather.
The wiring diagram for the dryer is located in the front electrical control box area.
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN
PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
WARNING

Table of Contents
SECTION I
IMPORTANT INFORMATION ............................................................................... 3
A. Receiving and Handling ............................................................................................................... 3
B. Safety Precautions...................................................................................................................... 3
SECTION II
AD-530 SPECIFICATIONS ...................................................................................... 6
SECTION III
INSTALLATION PROCEDURES ........................................................................... 8
A. Unpacking/Setup ........................................................................................................................ 8
B. Location Of The Dryer ............................................................................................................... 8
C. Dryer Enclosure Requirements ................................................................................................... 9
D. Fresh Air Supply...................................................................................................................... 10
E. Exhaust Requirements............................................................................................................... 11
F. Electrical Information ................................................................................................................ 23
G. Gas Information ........................................................................................................................ 25
H. Preparation For Operation ........................................................................................................ 29
I Preoperational Tests ................................................................................................................. 29
SECTION IV
OPERATING INSTRUCTIONS .............................................................................32
A. Starting the Dryer..................................................................................................................... 32
B. Shut Down Instructions ............................................................................................................ 34
SECTION V
SERVICE/PARTS INFORMATION ....................................................................... 35
A. Service ..................................................................................................................................... 35
B. Parts ......................................................................................................................................... 35
SECTION VI
WARRANTY INFORMATION ...............................................................................36
A. Returning Warranty Card(s) ...................................................................................................... 36
B. Warranty................................................................................................................................... 36
C. Returning Warranty Parts .......................................................................................................... 36

SECTION VII
ROUTINE MAINTENANCE ...................................................................................38
A. Cleaning ............................................................................................................................... 38
B. Adjustments .......................................................................................................................... 39
C. Lubrication ........................................................................................................................... 40
SECTION VIII
TROUBLESHOOTING ............................................................................................41
SECTION IX
DATA LABEL LOCATION/INFORMATION ....................................................... 48
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK OF
REPLACEMENT COMPONENTS ....................................................................... 50

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 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 or 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 [phone].
IMPORTANT: The dryer must be transported and handled in an upright position at all times.
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.

4
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 machine, 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 of coated or contaminated with gasoline, kerosene, oil,
paint, or wax. EXPLOSION COULD RESULT.
WARNING:DO NOT dry mop heads. Contamination by wax or flammable solvent will create a
fire hazard.
WARNING:DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or
similarly textured rubber-like materials. Drying in a heated basket (tumbler) may
damage plastics or rubber and also may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct work,
and area around the back of the dryer. The frequency of inspection and cleaning can best be determined from
experience at each location.

5
WARNING: This collection of lint in the burner area and exhaust duct work 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 ELECTRIC 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 drawer switch, heat safety
circuit, or tilt switches 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 dryer after the drying and cooling cycles have been complete can create a
fire hazard.
12. READ and FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE
DRYER.
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
SECTION II
AD-530 SPECIFICATIONS
NOTE:ADC reserves the right to make changes in specifications at any time, without notice or
obligation.

7
NOTE:ADC reserves the right to make changes in specifications at any time, without notice or
obligation
ADG-530HS Specifications
M
AXIMUM C APACITY ( DRY WEIGHT )* 60 lbs
B
ASKET (T UMBLER ) D EPTH 30"
B
ASKET (T UMBLER ) V OLUME ( PER BASKET ) 10.1 cu. ft.
B
ASKET (T UMBLER ) M OTOR (2 PLACES )3/4HP
D
OOR O PENING - D IAMETER (2 PLACES ) 21-1/2"
E
XHAUST D UCT O UTLET (2 PLACES )6"dia**
V
OLTAGE A VAILIABLE 120-230v / 1-phase / 60 Hz
A
PPROX . W EIGHT (U NCRATED ) 850 lbs.
A
PPROX . W EIGHT (C RATED ) 900 lbs.
H
EAT I NPUT ( TOTAL FOR BOTH BASKETS ) 204,000
A
IRFLOW ( PER BASKET / TUMBLER ) 550 cfm
G
AS I NLET S IZE (2 PLACES )3/4"N.P.T.
D
RYERS PER 45`/48` T RUCK 24/26
* Total capacity for both baskets (tumblers).
** EXHAUST MUST BE INCREASED TO A MINIMUM OF 8-INCH DIAMETER
IMMEDIATELY AFTER LEAVING THE DRYER CABIN ET

8
SECTION III
INSTALLATION PROCEDURES
Installation should be performed by qualified professionals in accordance with local and state codes. In the
absence of these codes, installation must conform to applicable AMERICAN NATIONAL STANDARDS:
ANSI Z223.1-LATEST EDITION (NATIONAL FUEL CODE)
or
ANSI/NFPA No. 70-LATEST EDITION (NATIONAL ELECTRIC 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 CSA C22.1-1990 or LATEST EDITION
(for ELECTRICAL CONNECTIONS).
A. Unpacking/Setup
Remove stretch wrap protective cover, shipping corners, and top cover from dryer.
NOTE: The access keys for the service doors are included in the information packet shipped in the
basket (tumbler). These keys should be removed and put in a safe place yet made
accessible because some will be needed throughout various phases in the installation of the
dryer.
Coin dryer’s are shipped with a coin box and coin box faceplate only. The coin box lock is not included and
must be purchased elsewhere or the lock can be ordered as a parts order from ADC factory.
The dryer can be moved to it’s 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
located at the rear of the base, and two (2) are located in the front. Once the bolts are removed, slide the dryer
off the skid.
With the skid removed, to make it easier to slide the dryer into its final position, slightly lower all leveling legs so
that the dryer will slide on the legs instead of the base frame. The dryer is equipped with four (4) leveling legs,
one at each corner of the dryer base. The slotted adjustment bolts for the two (2) front leveling legs are located
directly behind the lower access door, and the rear two (2) adjustments are directly behind the lower rear back
(guard) panel.
B. Location Of The Dryer
Before installing the dryer, be sure the location conforms to local codes and ordinances.
The dryer must be installed on a sound, level floor capable of supporting it’s weight. It is recommended that
carpeting be removed from the floor are on which the dryer is to rest.

9
Even though a 12-inch clearance is acceptable, it is recommended that the rear of the dryer be positioned
approximately 2 feet away from the nearest obstruction, i.e., wall, for ease of installation, maintenance, and
service.
1. Leveling The Dryer
To increase bearing life, improve efficiency, and provide for better automatic closure of main doors, the tumbler
should be tilted slightly to the rear. Four (4) leveling legs are provided for this purpose and are shipped inside the
top tumbler (basket) and must be installed at the time of installation. A leveling leg must be screwed into the
bottom of the dryer base at each corner area where the bolts used to secure the dryer to the wooden skid were
removed.
C. Dryer Enclosure Requirements
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
6-inches above the dryer outer top, except along the front of the dryer which may be closed in if desired.
NOTE: Even though a minimum of 6-inches above the dryer outer top is acceptable, a clearance of
18-inches (or more) is suggested for ease of installation and service (power electrical connections).
NOTE: When fire sprinkler systems are located above the dryers, a minimum of 12-inches above the
dryer outer top is required.

10
D. Fresh Air Supply
Air supply (make-up air) must be given careful consideration to assure proper and safe performance of each
dryer. An unrestricted source of air of 550 cfm is necessary for each tumbler. An unrestricted air entrace from
the outdoors (atmosphere) of a minimum of 2 square feet is required for each dryer. This area must be enlarged
if louvers or registers cover the opening. It is not necessary to have a separate make-up air opening for each
dryer. Common make-up air is distributed equally to the dryers. However, they must be set up in such a manner
that the make-up air is distributed equally to the dryers. For example, for a bank of eight (8) dryers, a total make-
up air opening of 16 square feet is required. Two (2) openings 2’ by 4’ (16 square feet) are 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 contaminated by dry cleaning solvents will result in irreparable damage to
motors and dryer components.
IMPORTANT: Make-up air openings should not be located near duct work exhaust outlets. If the
make-up air opening(s) are too close to the exhaust outlet, lint and fumes may be drawn
back into the dryer through these openings.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.

11
E. Exhaust Requirements
General Information
Exhaust duct work should be designed and installed by a competent technician. Improperly sized duct work will
create excessive back pressure which results in slow drying, increased use of energy, and shutdown of the burner
by airflow (sail) switch, burner hi-limit, or lint chamber hi-heat protector thermostat.
Where possible, it is suggested that a sperate (single) exhaust duct for each dryer/tumbler be provided.
CAUTION: IMPROPERLY SIZED or INSTALLED EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
CAUTION: DRYER MUST BE VENTED TO THE OUTDOORS.
The exhaust duct work should be laid out in such a way that the duct travels as directly as possible to the
outdoors with as few turns as possible. The shape of the duct work is not critical so long as the minimum cross-
sectional area is provided.
It is suggested that the use of 90º turns in ducting be avoided; use 30º or 45º angles instead.
The duct work should be smooth inside with no projections from the sheet metal screws or other obstructions
which collect lint. When adding ducts, the ducts to be added should overlap the duct to which it is connected.
ALL duct work joints must be taped to prevent moisture and lint from escaping into the building. Additionally,
inspection doors should be installed at strategic points in the exhaust duct work for periodic inspection and
cleaning.
The duct work material must meet applicable National, State, and Local codes, or in Canada, the duct work
material must meetapplicable Canadian National, Provincial, and Local codes.
IMPORTANT: When connecting duct work to the dryer’s top basket (tumbler) exhaust duct work, be
sure that when screws are used they do not restrict the operation (both opening and
closing) of the damper.
NOTE: When the exhaust duct passes through a wall, ceiling, or roof made of combustible materials, the
opening must be 2-inches larger (all the way around) than the duct. The duct must be centered
within this opening.
To protect the outside end of horizontal duct work from the weather, a 90º elbow bent downward should be
installed where the exhaust exits the building. If the exhaust duct work travels vertically up through the roof, it
should be protected from the weather by using a 180º turn to point the opening downward. In either case, allow
at least twice the diameter of the duct between the duct opening and nearest obstruction.
IMPORTANT:DO NOT use screens or caps on the outside opening of exhaust duct work.

12
IMPORTANT: Exhaust back pressure measured by a manometer at the dryer exhaust duct area
must not exceed 0.3 inches of water column.
NOTE: Careful consideration should be given to where the exhaust duct is located in relation to the
make-up air openings. If make-up air opening is too close to exhaust outlet, lint and fumes
will be drawn back in to the dryer area through these openings.
If the length of the duct work run or quantity of elbows used exceeds the specifications noted in this booklet, the
cross-sectional area of the duct work must be increased in proportion to the number of elbows or duct run added.
IMPORTANT: For extended duct work runs, the cross-sectional area of the duct can only be
increased to an extent. For extended duct work runs, a professional HVAC firm
should be consulted for proper venting information.
Duct work should be laid out in such a manner where allowances are made at the rear of the dryer for removal
of rear service panels/guards.
IMPORTANT: Even though the dryer’s exhaust outlet size is six (6) inches in diameter (at both the
top basket [tumbler] damper duct and the bottom basket [tumbler] elbow where it
leaves the dryer), the minimum connection at the point of exit from the dryer
in ALL cases MUST BE increased. The amount of increase in diameter will
depend on the venting application/layout as described further in this manual.
IMPORTANT: UNDER NO CIRCUMSTANCES CAN THE DRYER BE VENTED TO
THE OUTDOORS USING A 6-INCH DIAMETER EXHAUST DUCT!!!
1. Exhaust Connections of Top and Bottom Baskets (Tumblers)
There is no common venting connection provided with the dryer. Each basket (tumbler) exhaust duct is provided
with its own back draft damper. Each basket (tumbler) can be exhausted directly outdoors independently (refer
to the illustration [MAN2114] on page 16) or connected commonly (“Y”) together (refer to the illustration
[MAN2113] on page 17). Both single or common “Y” duct can be rigid or flexible ducting.

13
The illustration below shows the duct work connection points and what internal duct work is included in the
dryer.
The exhaust connection at the TOP basket (tumbler) must be made at the blower duct inside the cabinet. No
internal duct work is included for the TOP basket/tumbler. (Not available from ADC and must be
purchased elsewhere). Depending on the external duct work layout, the installer has the option of the duct
work coming out of the top of the back of the dryer. The duck work used inside of the dryer, from the blower
duct to where it exits the dryer, must be a minimum of 6-inches in diameter (30 square inches cross-sectional
area). At this point (where the internal ducting ends) the diameter must be increased to meet the application
as described further in this manual.
IMPORTANT: When connecting duct work to the top basket (tumbler) exhaust duct, be sure that
when screws are used they do not restrict the operation (both opening and closing)
of the damper.
IMPORTANT:ALL duct work joints must be taped to prevent moisture and lint from escaping
into the dryer and/or building.
The BOTTOM basket (tumbler) includes 6-inch duct work which extends from the dryer blower duct to the
lower back guard area. At this point the diameter must be increased to meet the application as described
further in this manual.

14
a. Connecting Both Top Baskets (Tumbler) and Bottom Baskets (Tumbler) Together
Both the top basket (tumbler) and the bottom basket (tumbler) can “Y” together to form one connection point.
The bottom basket (tumbler) already includes 6-inch diameter ducting extending to the lower back guard area.
The minimum connection at this point is 8 inches. The upper basket (tumbler) includes no internal duct
work. (Not provided by ADC and must be purchased elsewhere, must be a minimum of 6-inches, and only to
the top of the dryer.) At this point (where the internal ducting ends at top of the dryer) the diameter must be
increased to meet the application as described further in this manual.
IMPORTANT: When connecting duct work to the top basket (tumbler) exhaust duct, be sure that
when screws are used they do not restrict the operation (both opening and closing)
of the damper.
IMPORTANT:ALL duct work joints must be taped to prevent moisture and lint from escaping
into the dryer and/or building.
NOTE: Common (“Y”) exhaust connections of the top basket (tumbler) and bottom basket (tumbler)
should be installed in such a manner that the back guards/panels can be removed easily for
servicing.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct area should not exceed 0.3 inches water column when both baskets (tumblers)
are operating.

15
2. Single Dryer Venting
Where possible, it is suggested that a separate exhaust duct be provided for each dryer. The exhaust duct
work should be laid out in such a way that the duct work travels as directly as possible to the outdoors with as
few turns as possible. It is suggested that the use of 90º turns in ducting be avoided; use 30º or 45º angles
instead. The shape of the exhaust duct work is not critical so long as the minimum cross-sectional area is
provided.
IMPORTANT: Exhaust back pressure measured by a manometer at the dryer exhaust duct area
should not exceed 0.3 inches water column.
If the length of the duct work run or quantity of elbows used exceeds the specifications noted in this manual,
the cross-sectional area of the duct work must be increased in proportion to the number of elbows or duct run
added.
a. Single Dryer Venting - with each basket (tumbler) independently vented all the way to the
outdoors.
IMPORTANT: For extended duct work runs...or where numerous elbows are used, the cross-
sectional area can only be increased to an extent and a professional HVAC firm
should be consulted for proper venting information.
IMPORTANT: UNDER NO CIRCUMSTANCES CAN THE DRYER BE VENTED TO
THE OUTDOORS USING A 6-INCH DIAMETER EXHAUST DUCT!!!
Where independent exhaust ducting is used for each basket (tumbler), the connection size at the point where
the internal ducting (6-inch diameter) leaves the dryer, the minimum size connection is 8-inch diameter (54
square inches cross-sectional area)...and this is only true providing;
(Refer to illustration [MAN2114] on page 16 for details.)
1) The maximum duct run is no more than 20 feet.
2) The duct work is on a horizontal run (no riser).
3) There is no more than one (1) elbow...which includes the outside outlet (i.e., elbow used for
outside protection).
IMPORTANT: Even though the dryer’s exhaust outlet size is six (6) inches in diameter (at both the
top basket [tumbler] elbow where it leaves the dryer), the minimum connection at
this point of exit from the dryer is 8-inches diameter (54 square inches cross-
sectional area).

16