Dexter Laundry T-20X2 Mode D'emploi page 18

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 entering 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.
NOTE: Exhaust air must not be discharged into a flue which is used for exhausting fumes from
appliances burning gas or other fuels.
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
individual 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 total
exhausting (main discharge duct plus duct outlet from the dryer) should not exceed the
equivalent 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: A small diameter duct will restrict airflow; a large diameter duct will reduce air velocity -
both contributing to lint build up. An inspection door should be provided for periodic clean out of
the main duct.
8514-253-001 REV L page 18