Dexter Laundry DC30X2 Series, Руководство по обслуживанию и запасным частям

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6. EXHAUST INSTALLATION
. (Refer to Figure 3) Exhausting of the dryer(s) should be planned
and constructed so that no air restrictions occur. Any restriction due to pipe size or type of
installation can cause slow drying time, excessive heat, and lint in the room.
From an operational standpoint, incorrect or inadequate exhausting can cause a cycling of the high
limit thermostat, which shuts off the main burners and results in inefficient drying.
The exhaust duct connection near the top of the dryer will accept an 8” (200 mm) round duct.
Individual exhausting of the dryers is recommended. All heat, moisture, and lint should
be exhausted outside by attaching a pipe of the proper diameter to the dryer adapter collars and
extending it out through an outside wall. This pipe must be very smooth on the inside, as
rough surfaces tend to collect lint, which will eventually clog the duct and prevent
the dryer from exhausting properly. All elbows must be smooth on the inside. All joints must be
made so the exhaust end of one pipe is inside the next one downstream. The addition of
an exhaust pipe tends to reduce the amount of air the blower can exhaust. This does not
affect the dryer operation if held within practical limits. For the most efficient operation, it
is recommended that no more than 14 ft. (4.25 m) of straight 8 in. diameter pipe with two right
angle elbows be used for each cylinder.
Maintain a minimum of 1” (25mm) clearance between duct and combustible material.
If the exhaust pipe passes through a wall, a metal sleeve of slightly larger diameter should be set
in the wall and the exhaust pipe passed through this sleeve. This practice is required by some local
codes and is recommended in all cases to protect the wall.
This type of installation should have a means provided to prevent rain and high winds from enter
ing the exhaust when the dryer is not in use. A hood with a hinged damper can be used for
this purpose. Another method would be to point the outlet end of the pipe downward to prevent
entrance of wind and rain. In either case, the outlet should be kept clear, by at least 24 in.
(610 mm) of any objects, which would cause air restriction.
Never install a protective screen over the exhaust outlet.
When exhausting a dryer straight up through a roof, the overall length of the duct has the same
limits as exhausting through a wall. A rain cap must be placed on top of the exhaust and must be
of such a type as to be free from clogging. The type using a cone shaped “roof” over the pipe is
suitable for this application.
Exhausting the dryer into a chimney or under a building is not permitted. In either case there is a
danger of lint buildup, which can be highly combustible.
Installation of several dryers, where a main discharge duct is necessary, will need the following
considerations for installation (see Figure 3). Individual 8” (200 mm) exhaust ducts from each dryer
should enter main discharge duct at a 45-degree angle in the direction of discharge airflow.
NOTE:
Never install the individual ducts at a right angle into the main discharge duct. The indi
vidual ducts from the dryers can enter at the sides or bottom of the main discharge duct. Figure 3
indicates the various round main duct diameters to use with the individual dryer ducts. The
main duct can be rectangular or round, provided adequate airflow is maintained. The to
tal exhausting (main discharge duct plus duct outlet from the dryer) should not exceed the equiva
lent of 14 ft. (4.25 m) and two elbows. The diameter of the main discharge duct at the last
dryer must be maintained to exhaust end.
NOTE:
STATIC BACK PRESSURE should be a maximum of 0.3 in. w.c (7.6 mm w.c) at the rear
exhaust outlet of the dryer. If multiple dryers are connected to the common duct, ensure the back
draft damper is installed properly.
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