Bosch WTA74201AU User manual

en Installation and operating instructions
Tumble dryer
WTA74201AU

2
Your new tumble dryer
You have opted for a tumble dryer
manufactured by Bosch.
Please take a few minutes to read and
become familiar with the advantages of
your tumble dryer.
To meet the high quality demands
required by Bosch, every tumble dryer
that leaves our factory is carefully
checked to ensure that it functions
correctly and is in perfect condition.
For more information on our products,
accessories, replacement parts and
services, see our website www.bosch-
home.com or contact our Customer
Service centres.
If the operating and installation
instructions describe different models,
any differences will be pointed out at the
relevant points in the text.
Read these operating and installation
instructions before operating the tumble
dryer.
Display rules
:Warning!
This combination of symbol and signal
word indicates a possibly dangerous
situation. Not heeding the warning can
cause death or injuries.
Caution!
This signal word indicates a possibly
dangerous situation. Not heeding the
caution can cause property and/or
environmental damage.
Note/tip
Information about the optimum use of
the appliance/any other useful
information.
1. 2. 3. / a) b) c)
The steps are represented by numbers
or letters.
■/ -
Lists are represented by a small box or
a dash.

en
3
Contents en Installation and operating instructions
8Intended use. . . . . . . . . . . . . . . . .4
(Safety instructions . . . . . . . . . . .4
Children/people/pets . . . . . . . . . . . . . 4
Installation. . . . . . . . . . . . . . . . . . . . . . 6
Operation . . . . . . . . . . . . . . . . . . . . . . 8
Cleaning/Maintenance . . . . . . . . . . . 11
7Environmental protection . . . . .13
Packaging/old appliance . . . . . . . . . 13
Energy-saving tips. . . . . . . . . . . . . . . 13
5Installation and connection . . .13
Scope of delivery . . . . . . . . . . . . . . . 13
Installing and connecting
the dryer . . . . . . . . . . . . . . . . . . . . . . 13
Installation for the exhaust air duct . . 15
Optional accessories . . . . . . . . . . . . 20
YThe main points in brief . . . . . .21
*Getting to know
your appliance . . . . . . . . . . . . . .22
Dryer. . . . . . . . . . . . . . . . . . . . . . . . . 22
Control panel . . . . . . . . . . . . . . . . . . 23
Display panel . . . . . . . . . . . . . . . . . . 24
ZLaundry. . . . . . . . . . . . . . . . . . . .25
Preparing the laundry . . . . . . . . . . . . 25
Sorting laundry according to: . . . . . . 25
/Programs and buttons . . . . . . .26
Programs . . . . . . . . . . . . . . . . . . . . . 26
Buttons . . . . . . . . . . . . . . . . . . . . . . . 28
1Operating the appliance . . . . . . 29
Loading laundry and switching on
the dryer . . . . . . . . . . . . . . . . . . . . . .29
Setting a program . . . . . . . . . . . . . . .29
Starting the program . . . . . . . . . . . . .29
Program sequence . . . . . . . . . . . . . .30
Changing the program or
adding laundry . . . . . . . . . . . . . . . . .30
Program interruption . . . . . . . . . . . . .30
Program end . . . . . . . . . . . . . . . . . . .30
Removing laundry and
switching off the dryer . . . . . . . . . . . .30
Clean the fluff filter . . . . . . . . . . . . . .31
MSignal setting. . . . . . . . . . . . . . . 32
DCleaning . . . . . . . . . . . . . . . . . . . 33
Cleaning the dryer and
the control panel . . . . . . . . . . . . . . . .33
Cleaning the moisture sensor . . . . . .33
Cleaning the exhaust air duct . . . . . .33
3Faults and what to do
about them . . . . . . . . . . . . . . . . . 34
JAfter-sales service . . . . . . . . . . 36
[Consumption values. . . . . . . . . 37
JTechnical data . . . . . . . . . . . . . . 38

en Intended use
4
8Intended use
Intendeduse ■This appliance is intended for private
domestic use only.
■Do not install or operate this
appliance anywhere that is liable to
experience frost and/or outdoor
conditions. There is a risk that the
appliance will be damaged if
residual water in it freezes. If hoses
freeze up, they may crack/burst.
■This appliance must only be used for
drying and freshening up domestic
laundry, consisting of items that have
been washed with water and are
suitable for tumble drying (see label
on item). Using the appliance for any
other purpose is outside of the
scope of its intended application and
is forbidden.
■This appliance is intended for use up
to a maximum height of
4000 metres above sea level.
Before you switch on the appliance:
Check that there is no visible damage to
the appliance. Do not operate the
appliance if it is damaged. Should you
have any problems, please contact your
specialist dealer or our customer
service.
Read and follow the operating and
installation instructions and all other
information provided with this appliance.
Retain the documents for subsequent
use or for subsequent owners.
(Safety instructions
Safetyinstructi ons The following safety information
and warnings are provided to
protect you from injury and to
prevent material damage to
your surroundings.
It is nevertheless important to
take the necessary precautions
and to proceed with care when
installing, maintaining, cleaning
and operating the appliance.
Children/people/pets
:Warning
Risk of death!
Children and other people who
are unable to assess the risks
involved when using the
appliance may injure
themselves or may find
themselves in life-threatening
situations. Therefore please
note:
■The appliance may be used
by children over the age of 8
years and by persons with
reduced physical, sensory or
mental capacity or by
persons with a lack of
experience or knowledge as
long as they are supervised
or have received instruction
on how to use the appliance
safely and they have
understood the potential
risks of using the appliance.
■Children must not play with
this appliance.

Safety instructions en
5
■Do not allow children to
clean or maintain this
appliance unsupervised.
■Keep children under 3 years
and pets away from this
appliance.
■Do not leave the appliance
unattended when children or
other people who are unable
to assess the risks are in the
vicinity.
:Warning
Risk of death!
Children may lock themselves
inside appliances and find
themselves in a life-threatening
situation.
■Do not position the
appliance behind a door, as
this may obstruct the
appliance door or prevent it
from opening completely.
■Once an appliance has
reached the end of its life,
pull the mains plug from the
socket before severing the
mains cable, and then
destroy the lock on the
appliance door.
:Warning
Risk of suffocation!
If allowed to play with the
packaging/plastic film or
packing components, children
may become caught in these or
pull them over their heads and
suffocate.
Keep packaging, plastic film
and packing components away
from children.
:Warning
Risk of poisoning!
Detergents and care products
may result in poisoning if
consumed.
If accidentally swallowed, seek
medical advice. Keep
detergents and care products
out of the reach of children.
:Warning
Eye/skin irritation!
Contact with detergents or care
products may cause eye/skin
irritation.
Rinse eyes/skin thoroughly if
they/it come(s) into contact
with detergents or care
products. Keep detergents and
care products out of the reach
of children.

en Safety instructions
6
Installation
:Warning
Risk of electric shock/fire/
material damage/damage to
the appliance!
If the appliance is not installed
properly, this may lead to a
dangerous situation. Ensure
the following:
■The mains voltage on your
power socket must match
the rated voltage specified
on the appliance
(identification plate). The
connected loads and the
required fuse protection are
specified on the identification
plate.
■The appliance must only be
connected to alternating
voltage via a protective
contact socket that has been
correctly installed. This plug
socket must be freely
accessible at all times.
■The mains plug and the
protective contact socket
must match and the earthing
system must be correctly
installed.
■The installation must have an
adequate cross section.
■The mains plug must be
freely accessible at all times.
If this is not possible, in
order to comply with the
relevant safety regulations, a
switch (all pole
disconnection) must be built
into the permanent
installation in accordance
with electrical installation
regulations.
■If using a residual current
circuit breaker, only use one
that bears the following
mark: z. The presence of
this mark is the only way to
be sure that it fulfils all the
applicable regulations.
:Warning
Risk of electric shock/fire/
material damage/damage to
the appliance!
If the appliance's mains cable is
altered or damaged, this may
result in electric shock, short
circuiting or fire due to
overheating.
The mains cable must not be
kinked, crushed or altered, and
must not come into contact with
any heat sources.

Safety instructions en
7
:Warning
Risk of fire/poisoning!
Connecting the exhaust air duct
to ventilation shafts or
chimneys to which gas or coal-
burning stoves, cookers or
ovens or gas-fired space
heaters are already connected
runs the risk of causing fire or
poisoning.
Channel the exhaust air
through an exhaust air duct that
is routed directly outdoors.
Always have the chimney
sweep responsible confirm that
your appliance is operating
safely.
:Warning
Risk of fire/material damage/
damage to the appliance!
The use of extension cords or
power strips may result in fire
due to overheating or short
circuiting.
Connect the appliance directly
to an earthed socket that has
been correctly installed. Do not
use extension cords, power
strips or multi-way couplers.
:Warning
Risk of injury/material
damage/damage to the
appliance!
■The appliance may vibrate or
move when in operation,
potentially resulting in injury
or material damage.
Place the appliance on a
clean, even, solid surface
and, using a spirit level to
guide you, level it with the
screw-in feet.
Risk of injury/material damage/damage to the appliance!
■Incorrectly placing (stacking)
this appliance on top of a
washing machine may result
in injury, material damage
and/or damage to the
appliance.
If this appliance is to be
placed on top of a washing
machine, the washing
machine must be of at least
the same depth and width as
the appliance, and it must be
secured in place with the
appropriate connection set if
available ~Page 20. The
appliance MUST be secured
with this connection set.
Stacking the appliance in
any other way is forbidden.
Risk of injury/material damage/damage to the appliance!

en Safety instructions
8
■If you take hold of any of the
appliance's protruding parts
(e.g. the appliance door) in
order to lift or move it, these
parts may break off and
cause injury.
Do not take hold of any of
the appliance's protruding
parts in order to move the
appliance.
:Warning
Risk of injury!
■The appliance is very heavy.
Lifting it may result in injury.
Do not lift the appliance on
your own.
Risk of injury!
■The appliance has sharp
edges on which you could
cut your hands.
Do not take hold of the
appliance by its sharp
edges. Wear protective
gloves to lift it.
Risk of injury!
■If the hoses and mains
cables are not correctly
routed, they may constitute a
tripping hazard, which may
result in injury.
Route hoses and cables
such that they do not
constitute a tripping hazard.
Operation
:Warning
Risk of explosions/fire!
Laundry that has come into
contact with solvents, oil, wax,
wax remover, paint, grease or
stain remover may ignite when
dried in the machine, or even
cause the appliance to explode.
Therefore please note:
■Rinse the laundry thoroughly
with warm water and
detergent before drying it in
the machine.
■Do not place laundry in this
appliance to be dried if the
laundry has not been
washed first.
■Do not use the appliance if
industrial chemicals have
been used to clean the
laundry.
:Warning
Risk of explosions/fire!
■If there is any residual
material left in the fluff filter,
this may ignite when drying
is in progress, or even cause
the appliance to catch fire or
explode.
Clean the fluff filter regularly.
Risk of explosions/fire!
■Certain objects may ignite
when drying is in progress,
or even cause the appliance
to catch fire or explode.
Remove any lighters or
matches from pockets on
items of clothing.
Risk of explosions/fire!

Safety instructions en
9
■If there is coal dust or flour in
the air around the appliance,
this may cause an explosion.
Make sure that the area
around the appliance is kept
clean when it is in operation.
:Warning
Risk of fire/material damage/
damage to the appliance!
If a program is terminated
before the drying cycle has
finished, this prevents the
laundry from cooling down
sufficiently and may cause the
laundry to ignite, or may result
in material damage or damage
to the appliance.
■During the last part of the
drying cycle, the laundry in
the drum is not heated
(cooling cycle). This is to
ensure that it remains at a
temperature at which it will
not be damaged.
■Do not switch off the
appliance before the drying
cycle has finished unless you
remove all items of laundry
from the drum immediately
and spread them out (to
dissipate the heat).
:Warning
Risk of poisoning!
If additional appliances (such
as gas heaters, gas-fired
tankless water heaters, coal-
burning stoves connected to a
chimney or open fireplaces) are
being operated in the same
room as this appliance or in
adjacent rooms, this may
create a vacuum that sucks
exhaust gases back in. There is
a risk of poisoning if these
gases are inhaled.
Make sure that the area is
adequately ventilated. Always
have the chimney sweep
responsible confirm that your
appliance is operating safely.
:Warning
Risk of poisoning!
Poisonous fumes may be given
off by cleaning agents that
contain solvents, e.g. cleaning
solvent.
Do not use cleaning agents that
contain solvents.

en Safety instructions
10
:Warning
Risk of injury!
■If you support your weight/sit
on the appliance door when
it is open, the appliance may
tip over, which may result in
injury.
Do not support your weight
on the appliance door when
it is open.
Risk of injury!
■If you climb onto the
appliance, the worktop may
break, which may result in
injury.
Do not climb onto the
appliance.
Risk of injury!
■If you reach into the drum
while it is still rotating, you
risk injuring your hands.
Wait until the drum has
stopped rotating.
Caution!
Material damage/damage to
the appliance
■If the amount of laundry in
the appliance exceeds its
maximum load capacity, it
may not be able to operate
properly, or this may result in
material damage or damage
to the appliance.
Do not exceed the maximum
load capacity of dry laundry.
Make sure you comply with
the maximum load capacities
specified for each of the
programs ~Page 26.
Material damage/damage to the appliance
■If you operate the appliance
without a fluff catcher (e.g.
fluff filter, fluff depot,
depending on appliance
specifications), or if the fluff
catcher is incomplete or
defective, this may result in
damage to the appliance.
Do not operate the appliance
without a fluff catcher, or with
a fluff catcher that is
incomplete or defective.
Material damage/damage to the appliance
■Light objects such as hair
and lint may be sucked into
the air inlet when the
appliance is in operation.
Keep these away from the
appliance.
Material damage/damage to the appliance
■Foam and foam rubber may
deform or melt if dried in the
appliance.
Do not dry laundry items that
contain foam or foam rubber
in the appliance.
Material damage/damage to the appliance
■If you pour the wrong
quantity of detergent or
cleaning agent into the
appliance, this may result in
material damage or damage
to the appliance.
Use detergents/care
products/cleaning agents
and softeners in accordance
with the manufacturers'
instructions.
Material damage/damage to the appliance

Safety instructions en
11
■If the appliance overheats, it
may not be able to operate
properly, or this may result in
material damage or damage
to the appliance.
Make sure that the
appliance's air inlet is never
obstructed when the
appliance is in operation,
and that the area around the
appliance is adequately
ventilated.
Cleaning/Maintenance
:Warning
Risk of death!
The appliance is powered by
electricity. There is a risk of
electric shock if you come into
contact with live components.
Therefore please note:
■Switch off the appliance.
Disconnect the appliance
from the power supply (pull
out the plug).
■Never take hold of the mains
plug with wet hands.
■When removing the mains
plug from the socket, always
take hold of the plug itself
and never the mains cable,
otherwise this may damage
the mains cable.
■Do not make any technical
modifications to the
appliance or its features.
■Repairs and any other work
on the appliance must only
be conducted by our
customer service or by an
electrician. The same applies
for replacing the mains cable
(when necessary).
■Spare mains cables can be
ordered from our customer
service.
:Warning
Risk of poisoning!
Poisonous fumes may be given
off by cleaning agents that
contain solvents, e.g. cleaning
solvent.
Do not use cleaning agents that
contain solvents.
:Warning
Risk of electric shock/material
damage/damage to the
appliance!
If moisture penetrates the
appliance, this may cause it to
short circuit.
Do not use a pressure washer,
steam cleaner, hose or spray
gun to clean your appliance.

en Safety instructions
12
:Warning
Risk of injury/material
damage/damage to the
appliance!
The use of spare parts and
accessories supplied by other
brands is dangerous and may
result in injury, material damage
or damage to the appliance.
For safety reasons, use
genuine spare parts and
accessories only.
Caution!
Material damage/damage to
the appliance
Cleaning agents and agents for
pretreating laundry (e.g. stain
removers, prewash sprays, etc.)
may cause damage if they
come into contact with the
surfaces of the appliance.
Therefore please note:
■Do not allow these agents to
come into contact with the
surfaces of the appliance.
■Clean the appliance with
nothing but water and a soft,
damp cloth.
■Remove any detergent,
spray or other residues
immediately.

Environmental protection en
13
7Environmental
protection
Environmentalprotecti on Packaging/old appliance
)
Dispose of packaging in an
environmentally-responsible manner.
This appliance is designated according
to European directive 2012/19/EC
which governs waste electrical and
electronic equipment (WEEE).
The directive provides a framework for
the collection and recycling of old
appliances, which is valid across the
EU.
Energy-saving tips
■Spin the laundry before drying. The
drier the laundry, the shorter the
drying time will be, thus consuming
less energy.
■Load the dryer with the maximum
load.
Note: Do not exceed the maximum
load for the programs, as this
prolongs the drying time and
increases energy consumption.
■Ventilate the room and keep the air
inlet on the dryer free to ensure air
exchange.
■Clean the fluff filter after each drying
cycle. If the fluff filter is dirty, the
drying time is prolonged and energy
consumption is increased.
■Energy-saving mode: If the dryer is
not operated for a prolonged period,
it automatically switches off before
the program starts and when the
program has ended to save energy.
The display panel and indicator
lamps go off after a few minutes and
the Start button flashes. To activate
the lighting, press any button, open
or close the dryer door or turn the
program selector.
5Installation and
connection
Installati onandconnecti on Scope of delivery
■Dryer
■Installation and operating
instructions
■Basket for woollens*
Installing and connecting the
dryer
:Warning
Risk of death!
There is a risk of electric shock as the
dryer is operated with electricity.
■Check the dryer for visible damage.
You must not operate the dryer if it is
damaged.
■Before connecting the dryer to the
power supply, ensure that the
electric voltage specified on the
rating plate matches the voltage of
your socket.
■Only use earth-leakage circuit
breakers with the following symbol:
z.
■Ensure that the mains cable is not
kinked or trapped, and that it does
not come into contact with heat
sources or sharp edges.
* Depending on the model

en Installation and connection
14
:Warning
Children may lock themselves in the
dryer, putting their lives at risk!
Do not set up the dryer behind a door
or sliding door, as this may obstruct the
dryer door or prevent it from opening.
Caution!
Risk of injury
■Due to the heavy weight of the dryer,
you may injure yourself if you lift it.
Do not lift the dryer on your own.
■You could cut your hands on the
sharp edges of the dryer. Do not
hold the dryer by the sharp edges.
■Protruding parts on the dryer may
break off when it is lifted or pushed.
Do not move the dryer by holding
onto protruding parts.
Caution!
Risk of material damage to the dryer or
fabrics.
■Check the dryer for damage caused
during transportation. Never operate
a dryer if it is damaged.
■Any residual water in the dryer may
freeze and damage the dryer. Do not
install the dryer in rooms that are at
risk of frost.
During installation, ensure that:
■The dryer is placed on a clean, level
and firm surface,
■The mains plug can be accessed at
all times,
■The air inlet on the dryer is kept clear
and there is sufficient ventilation,
■The area around the dryer is kept
clean and
■The dryer is levelled using the
threaded feet.
Note: Check the alignment of the
appliance with a spirit level and
correct if necessary. Change the
height by turning the appliance feet.
All appliance feet must stand firmly
on the ground.
Incorrect alignment may cause high
noise levels, vibrations and improper
movement of the drum.
Note: If in doubt, have the appliance
connected by a specialist.

Installation and connection en
15
Installation for the exhaust air
duct
Caution!
Damage to the appliance
Inappropriate connecting of the exhaust
air duct to the dryer may cause
damages to the appliance. In order to
avoid it follow advises included in this
chapter.
Notes
■It is recommended to route the
exhaust air directly into the open air
through an exhaust air duct. A drain
check valve must be fitted then to
prevent air from flowing back.
■The air extraction system must not
exceed the specified pressure
losses.
■Clean the exhaust air duct regularly,
at least once a year.
When operating the dryer without an
exhaust air duct, the following must
also be observed:
■Ensure that the room is well
ventilated, otherwise energy
consumption and drying time will
increase. Bad ventilation of the room
may lead to the increase of moisture
which may cause damages, e.g. to
walls or furniture.
■Do not cover the exhaust air
opening. Leave approx. 1 m of free
space around the exhaust air
opening.
Connections on the dryer
Connections for an exhaust air duct are
located:
■on the back panel
The exhaust air opening on the back
panel is open when the dryer is
delivered (bayonet ring). The
exhaust air opening on the left side
panel is sealed with a cover.
■on the left side panel
You can switch the connection on the
back panel to the left side panel as
follows:
1. Remove the cover on the side panel.
2. Remove the bayonet ring from the
back panel and attach it to the
opening on the side panel.

en Installation and connection
16
3. Seal the opening in the back panel
with the cover.
Note: If there is a high level of
condensation in the exhaust air duct, it
is advisable to fix a condensation
collector (standard) or a drain hole with
a diameter of approximately 3 mm to
the lowest part of the exhaust air duct.
Exhaust air duct
All standard products can be used for
the exhaust air duct:
■flexible pipes
■galvanised metal ducts or pipes
■connectors, adapters and diverters
for flat duct systems and pipe
systems
■wall boxes for evaporation into the
open air or into a ventilation shaft
■adapters on rectangular ducts
■rectangular ducts or plastic pipes
■back pressure flap
Note: The material must be heat
resistant up to 80 °C and moisture
resistant.
Pressure losses
Note: The type and length of the
exhaust air duct, particularly elbows or
bends with small radii, can impede the
air flow. Keep diameter reductions and
pressure losses (resistance) to a
minimum.
The following must be avoided:
■long exhaust air ducts
■exhaust air ducts with small
diameters
■exhaust air ducts with many bends
and elbows.
Pressure losses through friction
Duct or pipe friction resistance, i.e.
friction on the inside of the exhaust air
duct, affects the air flow as follows:
■the smoother the internal wall
■the larger the diameter of the internal
wall
■the shorter the pipe
the lower the friction resistance.
Pressure losses due to fixtures
The exhaust air encounters further
resistance through fixtures built into the
pipe, e.g. diverters (bends, elbows,
angles), wall boxes with grids or
backpressure flaps.
Installation for pipe connection
■inside diameter = 100 mm
In order to ensure the minimum
required air flow, a certain pressure
loss (resistance) must not be
exceeded.
The permissible total pressure loss
in an exhaust air duct must not
exceed a certain value. This is
calculated as the sum of all
individual pressure loss values for
the straight pieces and fixtures in the
exhaust air duct.
Note: The value for the maximum
permissible total pressure loss for an
exhaust air duct is 50*.
■inside diameter > 100 mm
If the pipe connection has an inside
diameter > 100 mm and total
pressure loss greater than 50*,
increase the inside diameter of the
pipe connection.
* To determine the total pressure loss
see table ~"Individual pressure
loss values" on page 17

Installation and connection en
17
Individual pressure loss values
Pipe connection diameter > 100 mm Flat duct connection
Internal wall Pipe,
smooth
Flexible
pipe,
grooved
Flexible
pipe, cor-
rugated
110 x 54
smooth
220 x 54
smooth
Model variant
straight piece per 1 m length 4 6 12 10 3
Fixtures
Diverters
Bend
R = 300 mm 3 5 7 6 3
R = 200 mm 4 7 8 8 4
R = 100 mm 6 9 10 12 6
Angle 10 16 17 26 8
Elbow 19 22 24 > 50 17
Telescopic wall box with grid 14 28 7
Wall box with backpressure flap 6 13 3
5

en Installation and connection
18
Total pressure loss values
Installation option
Notes
■Route the exhaust air duct in such a
way that the dryer cannot draw the
moist, warm exhaust air back again.
■The outlet for the exhaust air must
be designed or positioned in such a
way as to prevent any additional
backpressure (e.g. from a direct
ingress of wind) in the escaping
exhaust air, e.g. by using 90°, facing
down ~Page 20
■The outlet for the exhaust air duct
must be no more than 2.5 m higher
than the exhaust air opening on the
appliance.
Installation options for the exhaust air
duct:
■Through a wall box into the open
air
Example: pipe connection - inside
diameter = 100 mm, smooth
Total pressure loss Pipe connection
0 - 50 100
0 - 80 110
120
130
A = straight piece (1.0 m) 4
B = curved pipe (R = 200 mm) 4
C = straight piece (1.5 m) 6
D = pipe elbow 19
E = telescopic wall box with grid 14
Total pressure loss 47

Installation and connection en
19
■Directly into the open air
Route the exhaust air duct directly
into the open air via an exhaust air
pipe through an open window.
Example: pipe connection - inside
diameter = 100 mm, flexible pipe,
corrugated
■Through a wall box into chimneys or
ventilation shafts
Notes
– It is not permitted to connect the
exhaust air duct to chimneys
which are connected to gas or
coal-fired ovens/cookers or gas-
fired heating systems.
– If the appliance is being
connected to a moisture-
insulated ventilation shaft the
reponsible chimney sweep must
be informed and the approval of
the local building department
(building supervision office) or
the owner of the building must be
obtained.
Caution!
Risk of poisoning
If other appliances are operated in
the room where the appliance is
installed or in adjoining rooms, e.g.
gas-fired heating systems, gas-fired
boilers, coal-fired ovens connected
to a chimney, or open fireplaces, a
vacuum may be created, leading to
waste gases being sucked back.
Note: In every case, have safe
operation confirmed by the
responsible chimney sweep, boiler
engineer, ventilation specialist, etc.
A = curved pipe (R = 300 mm) 7
B = straight piece (1.5 m) 18
C = curved pipe (R = 100 mm) 10
D = straight piece (0.5 m) 6
Total pressure loss 41

en Installation and connection
20
Installing more than one dryer
Up to 7 exhaust air dryers can be
connected to an intercepting pipe with a
smooth internal wall.
Note: The following points must be
observed:
■It is imperative that there are drain
check valves in the interception pipe
for every dryer. These valves prevent
the moist exhaust air from flowing
back into the washing and drying
room through dryers which are not in
operation.
■The outlet for the exhaust air must
be arranged/routed in such way as
to prevent any additional
backpressure (e.g. from a direct
ingress of wind) on the escaping
exhaust air.
■In every case, have safe operation
confirmed by the responsible
ventilation engineer/installer.
When connecting to the interception
pipe, avoid the following:
■mutual interference between dryers
■discharge of moisture in the washing
and drying room
■higher pressure losses (increase in
energy consumption and time)
■The exhaust air ducts of the
individual dryers (DT = R >=
100 mm) should already be
extended to the dimension of the
interception pipe upstream of the
drain check valves.
■Possible backpressure (e.g. caused
by wind ingress) can be minimised
by using a 90° bend, facing down.
Optional accessories
■Washer-dryer stack connection set:
To save space, the dryer can be
placed on top of a suitable washing
machine of the same width and
depth.
The dryer must be secured to the
washing machine using this
connection set.
Order number without pull-out
worktop: WTZ11311.
■Platform:
For easier loading and unloading,
use a platform to raise your dryer.
Transport laundry with the integrated
clothes basket integrated in the
platform's pull-out drawer.
Order number: WMZ20500.
■Exhaust air duct:
The exhaust air duct is extracted via
a hose.
Order number: WTZ1130.