ADC ML-175 Administrator Guide

ADC Part No. 113041
ML-175
Installation/Operator's Manual
For replacement parts, contact the distributor from which the dryer
was purchased or
American Dryer Corporation
88 Currant oad
Fall iver MA 02720-4781
Telephone: [phone] / Fax: [phone]
E-mail: [e-mail]
082098GS/abe
WARNING: For your safety the
information in this manual must be
followed to minimize the risk of fire or
explosion or to prevent property dama e,
personal injury or death.
Do not store or use asoline 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 li ht any appliance.
* Do not touch any electrical switch; do not use
any phone in your buildin .
* Clear the room, buildin or area of all
occupants.
* Immediately call your as supplier from a
nei hbor's phone. Follow the as supplier's
instructions.
* If you cannot reach your as supplier, call the
fire department.
Installation and service must be performed by a
qualified installer, service a ency or the as
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
domma e matériel, toute blessure ou la mort.
Ne pas entreposer ni utiliser dessence ni
dautres vapeurs ou liquides inflammables dans
le voisina e 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
az depuis un voisin. Suivez les instructions
du fournisseur.
* Si vous ne pouvez rejoindre le fournisseur
de az, 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 az.

Retain This Manual In A Safe 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 (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.
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)
ML-175
IMPORTANT NOTE TO PURCHASER
Information must be obtained from your local as supplier on the instructions
to be followed if the user smells as. 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 PRECA TIONS displayed on the equipment or specified in the installation/operator's manual
included with the dryer.
The following FOR YO R SAFETY caution must be posted near the dryer in a prominent location.
FOR YOUR SAFETY
Do not store or use asoline 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 voisina e 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 ALLOW ACCESS FOR CLEANING, ADJUST-
ING, INSTALLATION, or TESTING OF ANY E UIPMENT per OSHA (Occupational
Safety and Health Administration) STANDARDS.
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYER(S).
WARNING
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYER(S) IN OPERATION.
DRYER(S) SHOULD NE ER 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
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 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.
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 ................................................................................................................. 3
IMPORTANT INFORMATION
A. Receivin and Handlin ............................................................................................................... 3
B. Safety Precautions ....................................................................................................................... 4
SECTION II ............................................................................................................... 6
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. Specifications .............................................................................................................................. 6
B. Component Identification ............................................................................................................. 8
SECTION III ............................................................................................................ 10
INSTALLATION PROCEDURES
A. Location Requirements .............................................................................................................. 10
B. Unpackin /Settin Up ............................................................................................................... 11
C. Dryer Enclosure Requirements .................................................................................................. 13
D. Fresh Air Supply Requirements ................................................................................................. 14
E. Exhaust Requirements ............................................................................................................... 15
F. Electrical Information ................................................................................................................ 21
G. Gas Information ........................................................................................................................ 25
H. Steam Information ..................................................................................................................... 29
I. Preparation For Operation/Start-Up .......................................................................................... 33
J. Preoperational Tests .................................................................................................................. 34
K. Compressed Air Requirements ................................................................................................... 37
L. Shut Down Instructions .............................................................................................................. 38
SECTION IV
SERVICE/PARTS INFORMATION
A. Service ..................................................................................................................................... 39
B. Parts ......................................................................................................................................... 39
SECTION V
WARRANTY INFORMATION
A. Returnin Warranty Card(s) ...................................................................................................... 40
B. Parts ......................................................................................................................................... 40
C. Returnin Warranty Card(s) ...................................................................................................... 40

SECTION VI
ROUTINE MAINTENANCE
A. Cleanin ................................................................................................................................... 42
B. Adjustments .............................................................................................................................. 44
C. Lubrication ............................................................................................................................... 44
SECTION VII
REVERSING TIMER SPIN/DWELL ADJUSTMENTS ....................................45
SECTION VIII
DATA LABEL LOCATION/INFORMATION ......................................................46
SECTION IX
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS ........................................................................................................48

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 all times.

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.

5
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. 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.
NOTE:Failure to do so will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, the lint drawer switch, or the 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 steam pressure. Excessive steam pressure can
damage the steam coil and/or harm personnel.
13. Replace leaking flexible steam hoses or other 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.
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
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. SPECIFICATIONS
IMPORTANT:Gas Dryers and Steam Dryers must be provided with a clean, dry, regulated 80 PSI
(+/- 10 PSI) air supply.
NOTE:ADCreserves the right to make changes in specifications at any time, without notice or
obligation.
MAXIMUMCAPACITY(DRYWEIGHT)170 lbs. 77.26 kg
BASKET (TUMBLER) DIAMETER51-1/2" 130.81 cm
BASKET (TUMBLER) DEPTH42-1/2" 107.95 cm
BASKET (TUMBLER)MOTOR1-1/2 HP 1.12 kw
BLOWER(FAN/IMPELLOR)MOTOR7-1/2 HP 5.6 kw
DOOROPENING (DIAMETER)31-3/8" 79.7 cm
BASKET (TUMBLER) VOLUME51.2 cu. ft. 1.45 cu.m.
DRYERSPER20'/40' CONTAINER3/7
DRYERSPER45'/48' TRUCK8/8
VOLTAGEAVAILABLE 208-460v / 3ø / 3, 4w / 50/60Hz
APPROX. WEIGHT(UNCRATED)1,900 lbs. 861.8 kg
APPROX. WEIGHT(CRATED)2,066 lbs. 937.14 kg
HEATINPUT550,000 btu/hr 138,600 kcal/hr
AIRFLOW3,700 cfm 104.8 cmm
Inlet Pipe Size 1-1/4" F.P.T. -
COMPRESSEDAIRVOLUME6 cfh .17 cmm
COMPRESSEDAIRCONNECTION 1/8" N.P.T. -
VOLTAGEAVAILABLE 208-460v / 3ø / 3, 4w / 50/60Hz
APPROX. WEIGHT(UNCRATED)2,053 lbs 931.2 kg
APPROX. WEIGHT(CRATED)2,220 lbs. 1,007 kg
AIRFLOW4,400 cfm 124.6 cmm
COMPRESSEDAIRVOLUME6 cfh .17 cmm
COMPRESSEDAIRCONNECTION 1/8" N.P.T. -
STEAMCOMSUMPTION BOILERHP
NORMALLOAD
725 lbs/hr 329.1 kg/hr 19
OPERATING STEAMPRESSURESTEAMSUPPLYSTEAMRETURN
125 psi max 8.6 bar 1-1/2" -1-1/2" -
Shaded areas are stated in metric equivalents.

7
NOTE:ADCreserves the right to make changes in specifications at any time, without notice or
obligation.
Specifications
MLG-175 (Gas)
MLS-175 (Steam)

8
Illus. No. Description
1Microprocessor Control/Keyboard Panel Assembly (Controls)
2Control (Top Access) Door Assembly
3Main Door Assembly
4Lint Drawer
5Lint Door
6Wire Diagram (located behind Control Door)
7Data Label and Installation Label
8Top Console (Module) Assembly
B. COMPONENT IDENTIFICATION
1. Dryer Front View

9
Illus. No. Description
1Drive (basket) Motor
2Drive Assembly
3Blower Motor
4Idler Assembly
5Installation Label
6Data Label
7Heating Unit

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 to applicable American National Standards: National Fuel
Gas Code ANSI.Z223.1-LATEST EDITION and/or National Electric Code ANSI/NFPA NO. 70-LATEST
EDITION.
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.
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.

11
1. Leveling Dryer
a. To level the dryer, place 4-inch metal shims or other suitable material under the base pads. It is suggested
that the dryer be tilted slightly to the rear (refer to the illustration above).
b. The V-belts are disconnected from the tumbler drive motor for shipping. Reconnect V-belts before
starting the dryer.
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 at the rear base, 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 the lint door in place.

12
2. If more headroom is needed when moving the dryer into position, the top console (module) may be removed.
a. To Remove Top Console (module)...
1) Disconnect the ground wire (A in the illustration below) located at the rear upper left corner of the
dryer.
2) Remove the eight (8) sets of nuts and washers (B in the illustration below) holding the console
(module) to the base.
3) Disconnect the white plug (C in the illustration below) connector located on the top of the rear electric
service/relay box (provides power to the heat circuit).
4) Disconnect air connection from the 3-way micro valve.
5) Lift the console (module) off of the dryer base.
IMPORTANT:The dryer must be transported and handled in an upright position at all times.

13
NOTE:When fire sprinkler systems are located above the dryers, a minimum of 18-inches above
the dryer console (module) is required. Dryers may be positioned side wall to side wall,
however, 1 or 2-inches is suggested for ease of installation and maintenance. Allowances
must be made for the opening and closings of the control door and the lint door.
C. DRYER ENCLOSURE REQUIREMENTS
Even though a 12-inch clearance is acceptable, it is recommended that the rear of the dryer be positioned
approximately two (2) feet (24-inches) 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 four (4) inches and must not
extend more than four (4) inches to the rear of the front. A 2-inch clearance is required between the bulkhead
facing and the top of the dryer.
NOTE:Bulkhead facing should not be installed until after the dryer is in place. Ceiling area must be
located a minimum of 12-inches above the dryer top console (module) and 18-inches for steam
models.

14
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 air flow of 3,700 cfm (cubic feet per minute)must be
supplied to each gas dryer and 4,400 cfm (cubic feet per minute) must be supplied to each steam dryer. As
general rule, an unrestricted air entrance from the outdoors (atmosphere) of a minimum of four (4) square feet is
required for each gas dryer and a minimum of 4.75 square feet for each steam dryer.
To compensate for the use of registers or louvers used over the openings, this make-up airmust beincreased 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.
EXAMPLE:For a bank of six (6) dryers, two (2) unrestricted openings measuring 3 feet by 4 feet
(12 square feet each) 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 solvents fumes.
Make-up air that is contaminated by dry cleaning solvent fumes will result in
irreparable damage the motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.

15
E. EXHAUST REQUIREMENTS
1. General Exhaust Duct Work Information
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, overheating of the
dryer, and shutdown of the burner by the airflow (sail) switches, burner hi-limits, or
basket (tumbler) hi-heat thermostats.
CAUTION:DRYER MUST BE EXHAUSTED TO THE OUTDOORS.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUSTDUCT WORK CAN
CREATE APOTENTIAL FIREHAZARD.
NOTE:When a dryer is exhausted separately, it is recommended that 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 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. Single or independent dryer venting is recommended.
When single dryer venting is used, the duct work from the dryer to the outside exhaust outlet should not
exceed (20) feet. In the case of multiple (common) dryer venting, the distance from the last dryer to the
outside exhaust outlet should not exceed (20) feet. The shape of the duct work 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/angles instead. The radius of the elbowsshould 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 sectional area of the duct work must be increased in proportion to the number of elbows
used.
ALL duct work 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 duct work jointsmust be taped to prevent moisture and lint from escaping into the building.
Inspection door should be installed at strategic points in the exhaust duct work for periodic inspection and
clean-out of lint from the duct work.
IMPORTANT:Exhaust back pressure measured by a manometer in the exhaust duct should not
exceed 0.3 inches of water column.
NOTE:Where the exhaust duct work 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.

16
a. Outside Duct Work Protection
1) 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.
IMPORTANT:DO NOT use screens or caps on the outside of opening of exhaust duct work.
2. Single Dryer Venting
Where possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust duct 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 90° turns in the ducting be avoided; use 30° and/or 45° angles
instead. The shape of the exhaust duct work is not critical so long as the minimum cross section area is
provided.
IMPORTANT:The minimum duct size is 18-inches for a round duct 16” x 16” for a square duct.
THE DUCT SIZE MUST NOT BE REDUCED ANYWHERE DOWN
STREAM OF THE DRYER.
IMPORTANT:Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct area should not exceed 0.3 inches of water column.