ML-82
Exhaust Addendum
(Gas/Steam)
WARNING: For your safety the information in this addendum 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.
IMPORTANT
This is an Exhaust Addendum Only. For other specific requirements,
refer to the Installation/Operator’s Manual included in the dryer.
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: (508) 678-9000 / Fax: (508) 678-9447
E-mail: techsupport@amdry.com
021999SL/abe
ADC Part No. 113080
Retain This Addendum 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
POUR VOTRE SÉCURITÉ
Do not store or use gasoline or
other flammable vapors or liquids
in the vicinity of this or any other
appliance.
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables dans le voisinage de cet
appareil ou de yout autre appareil.
We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the right to make
changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change or
discontinue models.
Important
For your convenience, log the following information:
DATE OF PURCHASE
MODEL NO.
ML-82
DISTRIBUTORS NAME
Serial Number(s)
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.
“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.
Table of Contents
A.
B.
C.
D.
SPECIFICATIONS ........................................................................................................................ 2
UNPACKING/SETTING UP .......................................................................................................... 3
DRYER ENCLOSURE REQUIREMENTS .................................................................................. 4
EXHAUST REQUIREMENTS ...................................................................................................... 5
A. SPECIFICATIONS
MLG-82 (Gas)
MLS-82 (Steam)
NOTE: Duct work size varies with installation conditions.
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
2
WARNING
An exhaust duct transition piece is shipped inside of the dryer’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 a FIRE HAZARD and will VOID
the manufacturer’s warranty.
012999JEV-GS/cj
P/N: 114092
B. UNPACKING/SETTING UP
1. Inside the tumbler (basket) of this dryer is an
exhaust transition piece that must be installed
on the outlet of the exhaust before any further
venting is connected. To do this, follow the
procedures listed below;
a. Remove the exhaust transition piece from
the tumbler (basket) and place it on the
exhaust outlet.
b. Using the screws provided, secure the
exhaust transition piece to the dryer.
NOTE: It is recommended that this joint be
taped as well as ALL other duct
joints to prevent moisture and lint
from escaping into the building.
3
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
twelve (12) inches (18-inches 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 four (4) inches and must not extend more
than four (4) inches to the rear of the front. The bulkhead facing must not be closed in all the way to the top of
the dryer. A one (1) inch clearance is required.
NOTE: Allowances must be made for opening the control door.
Dryers may positioned side wall to side wall. However, a 1/16" minimum allowance must be made for opening
and closing of the control door and the lint door. It is suggested that the dryer be positioned about two (2) feet
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.
4
IMPORTANT: Even though a minimum of only 12-inches is required, 18-inches or more is suggested.
The additional clearance is advantageous for ease of installation and service.
IMPORTANT: When fire sprinkler systems are located above the dryers, a minimum of 18-inches
above the dryer console (module) is required. Dryers may be positioned side wall to
side wall however, a 1/16" minimum allowance is required between dryers (or wall)
for ease of installation and maintenance. Allowances must be made for the opening
and closings of the control door and the lint door.
D. 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 EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
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. 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 fifteen (15) feet. In the case of multiple (common) dryer venting, the distance from the last dryer to
the outside exhaust outlet should not exceed fifteen (15) feet. The shape of the duct work 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. Including basket/dryer elbow connections or elbows used for outside protection from
the weather, no more than one (1) elbow should be used for a horizontal exhaust duct run and no more than
three (3) in a verticle exhaust duct run. If more elbows are used, the cross section area of the duct work
must be increased in proportion to number of elbows added.
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 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 clean-out of lint from the 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.
IMPORTANT: Exhaust duct work diameter for gas models is14-inches and 16-inches for steam
models.
5
NOTE: Where 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.
a. Outside Duct Work Protection
1) To protect the outside end of horizontal duck work from the weather, a 90° 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 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 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: Minimum duct size for a gas dryer dryer is 14-inches for a round duct or 12-1/2" x
12-1/2" for a square duct. The minimum duct size for a steam dryer is 16-inches for
a round duct or 14-1/2" x 14-1/2" for a square duct. 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.
6
It is suggested that the duct work from each dryer not exceed fifteen (15) feet with no more than one (1)
elbow for a horizontal duct and three (3) for a vertical duct (including dryer connections and outside outlets).
If the duct work exceeds fifteen (15) feet or has numerous elbows, the cross section area of the duct work
must be increased in proportion to the length and number of elbows in it. In calculating duct size, the cross
section area of a square or rectangular duct must be increased by twenty percent (20%) for each additional
fifteen (15) feet. The diameter of a round exhaust duct should be increased ten percent (10%) for each
additional fifteen (15) feet. Each 90° elbow is equivalent to an additional thirty (30) feet, and each 45° elbow
is equivalent to an additional fifteen (15) feet.
IMPORTANT: For extended duct work runs, the cross section area of the duct work can only be
increased to an extent. When the duct work approaches the maximum limits noted in
this addendum, a professional heating venting air conditioning (HVAC) firm should be
consulted for proper venting information.
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 joints must be taped to prevent moisture and lint from escaping into the
building. Inspection doors should be installed at strategic points in the exhaust duct work for periodic
inspection and clean-out of lint from the duct work.
NOTE: Where 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.
7
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 exhaust 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.
3.Multiple Dryer (Common) Venting
If it is not feasible to provide separate exhaust ducts for each dryer, ducts from individual dryers may be
channeled into a "common main duct". The individual ducts should enter the bottom or side of the main duct
at an angle not more than 45° in the direction of air flow and should be spaced at least 38-1/4 inches apart.
The main duct should be tapered, with the diameter increasing before each individual duct (14-inch
minimum or 16-inch minimum for steam dryers) duct is added.
IMPORTANT: No more than four (4) dryers should be connected to one main common duct.
The main duct may be any shape so long as the minimum cross section is provided. The illustration on
page 10 shows the minimum cross section area for multiple dryer round or square venting. These figures
must be increased ten (10) square inches when rectangular main ducting is used, and the ratio of duct width
to depth should not be greater than 3-1/2 to 1. These figures must be increased in proportion if the main
duct run to the last dryer to where it exhausts to the outdoors is unusually long (over fifteen [15] feet) or has
numerous (more than one [1]) elbow in it. In calculating duct work size, the cross section area of a square
or rectangular duct must be increased twenty percent (20%) for each additional fifteen (15) feet. The diameter of a round exhaust must be increased ten percent (10%) for each additional fifteen (15) feet. Each
90º elbow is equivalent to an additional thirty (30) feet and each 45º elbow is equivalent to an additional fifteen
(15) feet.
IMPORTANT: For extended duct work runs, the cross section area of the duct work can only be
increased to an extent. When the duct work approaches the maximum limits as noted in
this addendum, a professional HVAC firm should be consulted for proper venting
information.
IMPORTANT: Exhaust back pressure measured by a manometer at each dryer exhaust duct area
should not exceed 0.3 inches of water column.
The duct 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 joints must be taped to prevent moisture and lint from escaping into the building.
inspection doors should be installed at strategic points in the exhaust duct work for periodic inspection and
clean-out of lint from the duct work.
NOTE: Where the exhaust 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.
8
NOTE: Where the exhaust 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.
a. Outside Duck 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 exhaust 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
nearest obstruction.
IMPORTANT: DO NOT use screens, louvers, or caps on the outside of opening of exhaust duct
work.
9
10
ADC 113080
1- 02/22/99-50
4- 02/25/00-150
2- 05/25/99-100
3* 09/21/99-100