Schulthess WT 14 MFH A Notice D'installation page 44

Calculating the pressure loss
Notice
To ensure the minimum required air
flow, the total pressure loss must not
exceed the value of 150.
The table below contains the individual
values for pressure loss in straight
stretches, with elbows and wall boxes.
The total pressure loss is derived from
the sum of the respective values (for
calculating the pressure loss, see
examples on the opposite page).
Corrugated tubing
If the dryer can not be connected to a
permanently installed exhaust air duct,
there is the possibility of discharging
the exhaust air through a corrugated
hose.
Internal diameter › 100 mm
If a total loss of more than 150 is
calculated when planning a connection
with a pipe inner diameter of 100 mm,
the minimum required air throughput
can be achieved by increasing the
inner diameter of the tube.
44 EN
Installing the exhaust duct
Depending on the structural situation,
the exhaust air can be conducted in
different ways to the outside:
• through a wall box into the open
• through a window into the open
• through a wall box into a fireplace or
ventilation shaft
Routing exhaust air through a
window into the open
If there is a window at the place of
installation, the exhaust air can be
led directly into the open air through
an exhaust air hose through the open
window.
Lay the exhaust air pipe in such a way
►
that the dryer cannot suck the moist
warm air already blown out back in
again.
The outlet opening for the exhaust
►
air must be designed or laid in such
a manner that no additional counter
pressure (e.g. through direct inflow of
wind) can be incurred by the waste air
streaming out.