Bosch WTA 4400 US - Manual (Page 10)

10
Exhaust air connection
d WARNING d
1. To reduce the risk of fire, this
dryer MUST BE EXHAUSTED
OUTDOORS.
2. To reduce the risk of fire, do
not use ducting longer than
recommended.
3. To reduce the risk of fire, only
use rigid or flexible metal duct.
4. DO NOT use a duct smaller
than 4 inches in diameter.
5. DO NOT use exhaust hoods
with magnetic latches.
6. DO NOT exhaust the dryer into
a chimney, furnace cold air
duct, attic, crawl space, or any
other ductwork used for
venting.
7. DO NOT install a flexible duct
in an enclosed wall, ceiling or
floor.
8. DO NOT crush or kink the
duct.
9. Do clean and inspect the
exhaust system on a regular
basis; at least once a year.
10. The exhaust duct must
terminate in a manner to
prevent back drafts or entry
of animals.
To prevent buildĆup of moisture and
accumulation of lint indoors, as well
as to maintain maximum drying
efficiency, this dryer must be
exhausted outdoors.
i Position the exhaust air duct so
that there is no counterĆ
pressure (e.g. from wind) on the
exhaust outlet.
There is an exhaust air outlet in the
rear panel of the dryer.
Place the end of the exhaust air
duct in the air outlet without
bending the duct. Use duct clamp
to secure the air duct. The exhaust
air duct should only be positioned
horizontally or vertically and never
left to sag.
Ductwork
To ensure optimum performance,
the ducting system of the dryer
should be as short as possible with
a minimum number of elbows.
Your dryer will work best when the
venting system has as few air flow
restrictions as possible. Exhaust
ducting which is longer than
recommended may extend drying
time, cause lint to accumulate and
affect dryer performance and dryer
lifeĆtime.
Whether connecting to an existing
venting system or a new venting
system, make sure that all ducting
is clean and free of lint.
The maximum permitted length for
both rigid and flexible metal duct is
shown in the table below.
11.
Number of
90° Turns
or Elbows Rigid Duct Flexible Duct
0 30 ft.
(914 cm) 20 ft.
(610 cm)
1 22 ft.
(671 cm) 15 ft.
(457 cm)
2 14 ft.
(427 cm) 9 ft.
(274 cm)
3 6 ft.
(183 cm) 4 ft.
(122 cm)
FourĆinch (approx. 100 mm)
diameter ducting should be used.
Use either rigid metal or flexible
metal ducting material.
DO NOT
use plastic or nonĆmetal
duct with this dryer.
DO NOT assemble the ductwork
with screws or fasteners that
extend into the duct. They will serve
as an accumulation point for lint.
Joints should be secured with duct
tape.
All joints should be tight to avoid
leaks. The male end of each duct
section must point away from the
dryer.
Exhaust vent hood
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.