Bosch V20-UL Operating, Care And Installation Instructions Manual page 11

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
life time.
Four inch (approx. 100 mm, in
Canada 102 mm) diameter ducting
should be used. Use either rigid
metal or flexible metal ducting
material.
DO NOT use plastic or non metal
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.
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.
Number of Rigid Duct
90° Turns
or Elbows
0 66 ft.
(2011 cm)
1 56 ft.
(1707 cm)
2 48 ft.
(1463 cm)
3 39 ft.
(1189 cm)
4 30 ft.
(914 cm)
Note:
Left-hand side exhaust installation
has a 90° turn inside the dryer. To
determine maximum exhaust
length, add one 90° turn to the
chart.
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.
Condensation outlet
If water from condensation builds
up in the exhaust air duct, it is
recommended that a condensation
collector (as commercially available)
is fitted or that a drain hole of
approximately 3 mm in diameter is
introduced in the lowest section of
the exhaust air duct.
Flexible Duct 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.
8 ft. 8 ft.
(240 cm)
To avoid exhaust restriction, the
outlet must be a minimum of
12 inches (30 cm) above ground
level or any other obstructing
surface.
Required parts
The parts required for the exhaust
air system (elbows, lines, exhaust
air outlets) are not included in
standard delivery of the dryer.
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