Fresh Air Supply Requirements; Exhaust Requirements - ADC AD-25V Installation Manual

Dryers may be positioned sidewall to sidewall. However, a
1/16" (1.5875 mm) minimum allowance must be made for
the opening and closing of the control door. 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 on the previous page for
details.

Fresh Air Supply Requirements _______

This appliance may only be installed in a room that meets
the appropriate ventilation requirements specified in the
national installation regulations.
The air supply (make-up air) must be given careful
consideration to ensure proper performance of each dryer.
An unrestricted source of air is necessary for each dryer. An
airflow of 460 cfm (cubic feet per minute) (13 cmm [cubic
meters per minute]) must be supplied to each dryer. As a
general rule, an unrestricted air entrance from the outdoors
(atmosphere) of a minimum of 1 square foot (0.093 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 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 the dryers. The
dryer must be installed with provisions for adequate
combustion and make-up air supply.
EXAMPLE: For a bank of eight dryers, two unrestricted
openings measuring 2 feet by 2 feet (0.61 meters by 0.61
meters) (4 square feet [0.372 square meters]) are
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 the motors and other dryer
components.
NOTE: Component failure due to dry cleaning solvent
fumes will void the warranty.
113237 - 15

Exhaust Requirements ________________

Exhaust ductwork should be designed and installed by a
qualified professional. Improperly sized ductwork will create
excessive back pressure, which results in slow drying,
increased use of energy, and shutdown of the burner by the
airflow (sail) switch, burner hi-limit, or lint chamber hi-heat
protector thermostat. The dryer must be installed with a proper
exhaust duct connection to the outside.
When possible, it is suggested to provide a separate (single)
exhaust duct for each dryer.
The design of the flue system shall be such that any
condensate formed when operating the appliance from cold
shall either be retained and subsequently re-evaporated or
discharged.
CAUTION: This dryer produces combustible lint and
must be exhausted to the outdoors.
Improperly sized or installed exhaust ductwork can
create a potential fire hazard.
The exhaust ductwork should be laid out in such a way that
the ductwork travels as directly as possible to the outdoors
with as few turns as possible. The shape of the ductwork is
not critical as long as the minimum cross section area is
provided.
recommended.
It is suggested that the use of 90° turns be avoided; use 30°
or 45° angles instead.
The ductwork 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 ductwork 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 ductwork for
periodic inspection and cleaning.
IMPORTANT: When connecting ductwork 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 ductwork passes through a wall,
ceiling, or roof made of combustible materials, the
opening must be 2-inches (5.08 cm) larger than the duct
(all the way around). The duct must be centered within this
opening.
To protect the outside end of the horizontal ductwork from the
weather, a 90° elbow bent downward should be installed
where the exhaust exits the building. If the ductwork 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, louvers, or caps on the
outside opening of the exhaust ductwork.
Exhaust back pressure measured by a manometer at the
dryer exhaust duct area must be no less than 0 and must
not exceed 0.3 in WC (0.74 mb).
It is recommended that exhaust or booster fans not be
used in the exhaust ductwork system.
www.adclaundry.com
Single or independent dryer venting is
9