American Dryer EURO-35 User Manual
EURO-35
Installation/Operator’s 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 distributor from which the dryer
was purchased or
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781
Telephone: +1 (508) 678-9000 / Fax: +1 (508) 678-9447
e-mail: techsupport@amdry.com
111999EL/tcosta ADC Part No. 113115
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/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.
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.
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.
Important
For your convenience, log the following information:
DATE OF PURCHASE MODEL NO.
DISTRIBUTORS NAME
Serial Number(s)
EURO-35
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 (508) 678-9447 or telephone your orders 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.
«Attention: Lor des opérations
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
d’entretien des commandes étiqueter tous
filsnt 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 door switch or the heat circuit devices
ever be disabled.
WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY or FIRE COULD 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/operator's 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...............................................................................................6
A. Specifications ............................................................................................................................ 6
SECTION III
INSTALLATION PROCEDURES ......................................................................8
A. Unpacking/Setting Up ................................................................................................................. 8
B. Location Requirements ................................................................................................................ 9
C. Dryer Enclosure Requirements................................................................................................... 10
D. Fresh Air Supply ........................................................................................................................11
E. Exhaust Requirements ............................................................................................................... 12
F. Electrical Information................................................................................................................. 18
G. Gas Information ........................................................................................................................ 26
H. Steam Information..................................................................................................................... 30
I. Preparation For Operation/Start-Up .......................................................................................... 35
J. Preoperational Tests .................................................................................................................. 36
K. Preoperational Instructions ........................................................................................................ 37
L. Shut Down Instructions ............................................................................................................. 40
SECTION IV
SERVICE/PARTS INFORMATION .................................................................41
A. Service ..................................................................................................................................... 41
B. Parts ......................................................................................................................................... 41
SECTION V
WARRANTY INFORMATION .........................................................................42
A. Returning Warranty Card(s)....................................................................................................... 42
B. Parts ......................................................................................................................................... 42
C. Returning Warranty Card(s)....................................................................................................... 42
SECTION VI
ROUTINE MAINTENANCE ............................................................................44
A. Cleaning .................................................................................................................................... 44
B. Adjustments .............................................................................................................................. 45
C. Lubrication................................................................................................................................ 45
D. Lint Drawer Removal ................................................................................................................ 46
SECTION VII
TECHNICAL INFORMATION ........................................................................47
A. Data Label ................................................................................................................................ 47
SECTION VIII
REVERSING TIMER SPIN/DWELL ADJUSTMENTS.................................. 49
SECTION IX
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS ................................................................................................50
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/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 +1 (508) 678-
9000.
IMPORTANT : The dryer must be transported and handled in an upright position at all times.
3
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 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 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 rubberlike 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.
WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire
hazard.
8. A ground (earth) connection must be provided and installed in accordance with local or regional codes. In
the absence of these codes, grounding must be suitable for the appliance category in accordance with
national installation regulations of the country of destination.
NOTE: Failure to do so will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety
circuit, ever be disabled.
WARNING: PERSONAL INJURY or FIRE COULD RESULT.
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 complete 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.
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.
5
6
SECTION II
SPECIFICATIONS
A. SPECIFICATIONS
MAXIMUM CAPACITY (DRY WEIGHT) 75 lbs. 34 kg
BASKET (T UMBLER) DIAMETER 37" 94 cm
BASKET (T UMBLER) DEPTH 36" 91.5 cm
BASKET (T UMBLER) MOTOR 1 HP* .746 kw
DOOR OPENING (DIAMETER) 21-1/2"
BASKET (T UMBLER) VOLUME 22.4 cu. ft. .634 cu.m.
DRYERS PER 20'/40' CONTAINER 10/20
DRYERS PER 6m/12m CONTAINER 10/20
DRYERS PER 45'/48' TRUCK 24/24
DRYERS PER 14m/15m TRUCK 24/24
VOLTAGE AVAILABLE 120-460v 1ø-3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 833 lbs.
APPROX. WEIGHT (CRATED) 883 lbs. 400.5 kg
HEAT INPUT 200,000 btuh 50,400 kcal/hr
GasElectric
AIRFLOW 1,200 cfm 33.98cmm
INLET PIPE CONNECTION 3/4" F.P.T.** --
OVEN SIZE
KW
KW
VOLTAGE AVAILABLE 120-460v 1ø - 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT (UNCRATED) 864 lbs. 392.7 kg
APPROX. WEIGHT (CRATED) 914 lbs. 415.5 kg
AIRFLOW 1350 cfm 38.23 cmm
COMPRESSED AIR VOLUME .75 cfh .02 cmh
AIR CONNECTION 1/8" F.P.T. --
Steam****
Shaded areas are in metric equivalents
BTUH
(60 HZ)
30 102,390 25,800
33 --
36 122,870 30,950
40 -- 34,390
30 -- -- -- 88 -- 77 -- -- -- 45 41 -33 -- -- -- -- -- -- -- 53 -- -- -- --
36
40
STEAM CONSUMPTION BOILER HP NORMAL LOAD
238.7 lbs/hr 108.3 kg/hr 7
OPERATING PRESSURE SUPPLY CONNECTION** RETURN CONNECTION
125 psi max 8.6 bar 1" -- 1" --
KCAL/HR
(50 Hz)
28,370
208/1ø 240/1ø 208/3ø 240/3ø 380/3ø 416/3ø
60 Hz 50 Hz 50/60 Hz 60 Hz 50 Hz 50/60 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
--
--
APPLIED VOLTAGE/PHASE/APPROX. AMP DRAW***
-- -- 105 -- 92 -- -- -- 53 48 --
-- -- -- -- -- -- -- -- 59
54.61 cm
377.8 kg
460/3ø
--
--
* EURO-35 50 Hz 1-phase (1ø) non-reversing dryers use a 3/4 HP motor. ALL EURO-35 reversing dryers
are supplied with two 3-phase motors standard: a 1 HP blower motor and a 1/2 HP drive motor.
** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
*** Contact factory for information not listed, 3-phase (3ø) figures shown are for 3-wire service.
**** Specify air-operated or electromechanical steam damper system. Air-operated steam damper system
must be provided with clean, dry and regulated 80 psi +/-10 psi (552 kPa +/- 69 kPa) air supply.
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
Specifications
EURO-35
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
7
8
SECTION III
INSTALLATION PROCEDURES
Installation should be performed by competent technicians in accordance with local and national regulations or
codes of the country of destination.
IMPORTANT: If connection to this appliance is made with flexible hose it must be suitable for
the appliance category in accordance with national installation regulations of the
country of destination, and if in doubt the installer must contact the supplier. The
manufacturer of this appliance DOES NOT recommend the use of flexible gas
supply line/hose.
A. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.
IMPORTANT: Dryer must be transported and handled in an upright position at all times.
NOTE: For OPL dryer models equipped with locks, the lock used is a dummy lock and no key is
supplied or needed. The lock can be turned with any key, a screwdriver, a small coin, or any
small sharp object. For coin-operated dryers, the MK-100 (master key for both the Control
Door and Lint Door) should be made accessible because it will be needed throughout various
phases in the installation of the dryer.
The dryer can be moved to its final location while still attached to the skid or with the skid removed. To un-skid
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.
1. Leveling Dryer
The dryer is equipped with four (4) leveling legs, one 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.
B. LOCATION REQUIREMENTS
Before installing the dryer, be sure the location conforms to local and national codes and ordinances.
1. The dryer must be installed on a sound level floor capable of supporting its weight. It is recommended that
carpeting be removed from the floor area that the dryer is to rest on.
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 (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 the manual
(refer to Exhaust Requirements in Section E).
IMPORTANT : Dryer should be located where a minimum amount of exhaust duct will be necessary.
9
10
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
twelve (12) inches (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: Allowance must be made for opening the control door.
Dryers may be positioned side wall to side wall. However, a 1/16” (0.16 cm) minimum allowance must be made
for the opening and closing of the control doors. It is suggested that the dryer be positioned about 2 feet (0.61
meters) away from the nearest obstruction for ease of installation, maintenance, and service (to be measured from
the back guard). Refer to the illustration above for details.
NOTE: Air considerations are important for proper and efficient operation.
D. FRESH AIR SUPPLY
The EURO-35 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. As a general rule, an unrestricted air
entrance from the outdoors (atmosphere) of a minimum of 1-1/2 square feet (.14 square meters) is required for
each dryer. If registers or louvers are installed over the openings, then the area must be increased. It is not
necessary to have a separate make-up air openings for each dryer. Common make-up air openings are acceptable.
However, they must be set up in such a manner that the make-up air is distributed equally to the dryers.
EXAMPLE: For a bank of eight (8) dryers, two (2) unrestricted openings measuring 2 feet by 3 feet - .61
meters by .91 meters - (6 square feet [.56 square meters] is acceptable).
IMPORTANT : Make-up air openings should not be located in an area directly near where exhaust
vents exit the building.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT : Make-up air must be provided from a source free of dry cleaning solvent fumes.
Make-up air that is contaminated by dry cleaning solvent fumes will result in
irreparable damage to motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.
11
12
E. EXHAUST REQUIREMENTS
Exhaust duct work should be designed and installed by a qualified professional. Improperly sized duct work will
create excessive back pressure which results in slow drying, increased use of energy, and shutdown of the burner
by the airflow (sail) switch, burner hi-limit, or lint chamber hi-heat protector thermostat.
Wherever possible, it is suggested that a separate (single) exhaust duct be provided for each dryer.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
CAUTION: DRYER MUST BE EXHAUSTED TO THE OUTDOORS.
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. The shape of the duct work is not critical so long as the minimum cross
section area is provided. Single or independent dryer venting is recommended.
It is suggested that the use of 90° turns be avoided; use 30° or 45° angles instead.
The duct work should be smooth inside with no projections from sheet metal screws or other obstructions which
will collect lint. When adding ducts, the ducts to be added should overlap the duct to which it is connected. ALL
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.
IMPORTANT : When connecting duct work to the dryer exhaust duct, be sure that when screws are
used they DO NOT restrict the operation (both opening and closing) of the damper.
NOTE: When the exhaust duct passes through a wall, ceiling, or roof made of combustible materials,
the opening must be 2-inches (5 cm) 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 90° elbow bent downward should be
installed where the exhaust exits the building. If the duct work travels vertically up through the roof, it should be
protected from the weather by using a 180° turn to point the opening downward. In either case, allow at least
twice the diameter of the duct between the duct opening and the nearest obstruction (i.e., roof or ground level).
IMPORTANT : DO NOT use screens or caps on the outside of opening of exhaust duct work.
IMPORTANT : Exhaust back pressure measured by a manometer at the dryer exhaust duct area must
not exceed 0.3 inches of water column (0.75 mbar).
SINGLE DRYER VENTING
IMPORTANT: For exhaust duct runs up to 20 feet (6 meters), a minimum size of 10-inches (25 cm)
must be used.
HORIZONTAL VENTING
When a single 10-inch (25 cm) horizontal vent is used, the duct work to the outlet cannot exceed 20 feet (6 m)
(refer to Illus. A below). This calculation of 20 feet (6 m) compensates or allows for the use of a maximum of
only one (1) elbow (which is the outside outlet protection).
Illus. A
13
14
VERTICAL VENTING
When vertical single 12-inch (30.48 cm) venting is used (refer to Illus. B below), the duct work from the dryer
to the outside outlet cannot exceed 25 feet (7.6 meters) (refer to Illus. B below). This calculation compensates
for the use of a maximum of three (3) elbows including the two (2) elbows creating the 180° (turned downward)
outside outlet.
Illus. B
If the length of the duct run or quantity of elbows used exceeds the above noted specifications, the cross section
area of the duct work must be increased in proportion to the number of elbows or duct run added.
IMPORTANT: Minimum duct size for a dryer that is vented horizontally is 10-inches (25.4 cm) for a
round duct (or different cross section with an area of 80 square inches [516.12 square
centimeters]).
IMPORTANT: Minimum duct size for a dryer that is vented vertically is 12-inches (30.48 cm) for a
round duct (or different cross section with an area of 115 square inches [741.93
square centimeters]).
IMPORTANT: Never reduce the duct size anywhere downstream of the dryer.
IMPORTANT: For extended duct work runs, the cross section 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.
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