6-2
07/02
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 chamber hi-heat protector thermostat.
Where possible, it is suggested to provide a separate (single) exhaust duct 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 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 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 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 though 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 of 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 are
must not
exceed 0.3 inches of water column (W.C.)
COMMERCIAL MULTI LOAD DRYERS - MDG30, MC2, PC2, PNA, and MNA
