6-7
07/02
COMMERCIAL MULTI LOAD DRYERS - MDG30, MC2, PC2, PNA, and MNA
IMPORTANT VENTING REMINDERS
1.
Duct work size and installation
should be
done by a qualified professional.
2.
The dryer
must be
exhausted to the outdoors.
3.
Duct work
should be
routed as short as possible to the outdoors with as few elbows as possible.
4.
Avoid 90
°
turns, use 30
°
or 45
°
turns instead. Long radius turns offer reistance to airflow.
5.
The size of the duct work
should be
a minimum
of 10 inches if vented vertically and 8 inches if vented horizontally.
6.
The inside duct work
should be
as smooth as possible with no projections from sheet metal screws.
Ducts
should overlap
the duct to which it is to be connected.
7.
All
duct joints
should be
taped to prevent moisture and lint form escaping into the building.
8.
Inspection or clean out doors
should be
installed at strategic points in the duct work for periodic inspection and
cleaning.
9.
Where ever the duct passes through combustible materials, the opening must be 2 inches larger (all the way around)
than the duct. The duct must be centered within this opening.
10. The outside of the duct work must be protected from the weather. A 90
°
elbow
should be
used for horizontal run
and when vertically through a roof by using a 180
°
turn to point the opening downward. The distance between the
exhaust duct and the nearest obstruction (i.e., roof or ground)
must be
twice the diameter of the duct.
11.
DO NOT
use screens or caps on the outside of the exhaust duct work.
12. Exhaust back pressure measured by a manometer at the dryer exhaust duct area
must not
exceed 0.3 inches of
water column (W. C.).
13. WARNING - DRYER
MUST NEVER BE
OPERATED WITH OUT THE LINT FILTER and SCREEN IN PLACE.
14. Exhaust duct work outlets
should not be
located in an area directly where the makeup air openings are located.
15. Make-up air opening must be a minimum of one square foot for each dryer. Common make-up openings are
acceptable.
