Bosch Vision 300 series Operating, Care And Installation Instructions Manual page 18

system, make sure that all ducting is
clean and free of lint.
The maximum permitted length for
rigid duct and for rigid duct used with
flexible metal duct is shown in the table
below. If using flexible metal ducting to
connect the appliance to the ductwork
system, the total length of flexible
metal duct used shall not exceed 2.4 m
and can only be used to connect the
dryer to the ductwork system. As the
table below shows, the maximum
overall ductwork length is reduced if
flexible ducting is used.
Maximum Ductwork Length
Numberof
90° Turns
or Elbows
Rigid Duct
Flexible Duct
in
Combination
with Rigid
Duct
0 66 ft. 45 ft.
(201 1 cm) (1372 cm)
1 56 ft. 36 ft.
(1707cm) (1097 cm)
2 48 ft. 29 ft.
(1463cm) (884 cm)
3 39 ft. 22 ft.
(1189cm) (671 cm)
4 30ft. 16ft.
(914cm) (488 cm)
Note:
Side and bottom exhaust installations
have a 90 °turn inside the dryer. Take
this into account when using the table
above.
The use of more than two 90 ° turns are
not recommended. For best
performance, separate all turns by at
least 4 ft. of straight duct, including
distance between last turn and exhaust
hood.
Good
Better
Keep exhaust ductwork as short and
as straight as practical. This will
increase air flow and result in shorter
drying times.
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Do not allow exhaust ductwork to be
longer than necessary. Longer
ductwork will reduce airflow and will
result in longer drying times.
Do not allow exhaust ductwork to be
crushed or otherwise constricted.
Constricted ductwork will reduce
airflow and result in longer drying times.
Constricted ductwork could reduce
exhaust airflow enough to cause an
error condition, halting the dryer cycle.
Check to be sure the exhaust duct is
not crushed or constricted.
Exhaustventhood
The exhaust duct must end with an
approved exhaust vent hood with
swing out damper(s). DO NOT use an
exhaust vent hood with magnetic
latches.
To avoid exhaust restriction, the outlet
must be a minimum of 12 inches (30
cm) above ground level or any other
obstructing surface.
Required Ductwork Parts
The parts required for the exhaust air
system (elbows, lines, exhaust air
outlets) are not included in standard
delivery of the dryer (see the
Accessories section for information on
ordering parts.)
Professional installation of ductwork is
recommended.
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