STIEBEL ELTRON LWZ 70 User manual

279162
26_04_01_0213
LWZ 70
Central ventilation unit
Operating and installation instructions

2
Symbols used in these instructions.
Observe the following safety instructions:
Please note:Warning about possible
dangers
i
Note: Important information
Content
1. Operating instructions
for users and contractors
1.1 Equipment description 3
1.2 User interface 4
1.3 Operation 4
1.4 Maintenance and cleaning 5
2.1 Specification 6
2. Installation instructions
for contractors 6
2.2 Installation 7
2.3 Installation on the air side 8
2.4 Electrical connection 8
2.5 Frost protection 8
2.6 Settings 10
Commissioning report 13
2.7 Fault analysis 13
2.8 Maintenance and cleaning 14
3. Environment and recycling 18
5. Service and warranty 11

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1. Operating instructions for users and contractors
1.1 Equipment description
1.1.1 General
The LWZ 70 can recover up to 90% of
the latent energy in extract air.This is
made possible by the use of new types of
countercurrent heat exchangers.The air
flow rate is regulated independently by
two energy-saving DC fans.This makes the
LWZ 70 a particularly powerful and highly
efficient central unit for ventilating several
rooms.
1.1.2 Description of functions
A central control unit safeguards the reliable
equipment operation and minimum energy
consumption whilst maintaining maximum
comfort. It ensures that the selected set air
flow rates remain constant.
The LWZ 70 is equipped with a user interface
with display.That enables an infinitely variable
adjustment of the air flow rate as well as the
scanning of operating details on the display,
without requiring the device to be opened.
Settings in the program of the central
controller can be called up and modified at
the user interface.
At a glance
 Switching the device ON and OFF
 Displaying the fan stage and the
air flow rate
 Infinitely variable flow rate
selection
 Scanning temperatures and status
 Fault display
1.1.3 Function
In apartments and houses, the LWZ 70
central ventilation unit uses two fans and
separate channels to draw, respectively via
individual filter mats, outside air into the
building and extracted air from rooms which
are subject to odour or humidity loads
(kitchen, bathroom, toilet, conservatory).
Both air streams are routed via a
countercurrent heat exchanger where the
outside air absorbs energy that is transferred
from the extract air.The airways are separated
from each other, thereby preventing odours
from being transferred between outside
air and extract air, subject to the correct
operation of the equipment.
The heated fresh air is blown into the
accommodation via suitable air ducts and
adjustable vents (available as accessories),
whilst the cooled extract air is expelled
through the roof or through a wall.
1.1.4 Shutting the equipment down
Even during longer periods away from home,
it is recommended that the equipment should
be allowed, via the remote control, to run
at switch position 1. Should the equipment,
nevertheless, be switched off for longer
periods, pull its power supply plug from the
socket. Prior to this disconnection, switch OFF
the device via the user interface.
1.1.4 Incorrect operation
Never
use extracted air loaded with grease,
explosive gases, dust or adhesive aerosols
install the unit outdoors
connect cooker hoods and dryer exhausts
to the ventilation system.
–
–
–
Only qualified contractors are permitted to
work on the equipment. Never adjust the
ventilation and extract air valves inside the
rooms.These have been adjusted during
commissioning. Never make any modifications
to the internal equipment electrics or controls.
Trouble-free operation can only be ensured
with a closed filter door.
1.1.5 Regulations and standards
DIN 18017 - Ventilation of bathrooms and
flush toilets
DIN 1946 T6 E - Ventilation and air
conditioning, domestic ventilation
DIN 2088 - Domestic ventilation equipment
VDI 2087 - Air ducts [or local regulations]
Relevant Building Regulations
Important information
Please note:The ventilation device
must only be installed and
maintained by qualified contractors
Operating and installation
instructions
i
Note: Keep these operating and
installation instructions safely and
pass them on to any new user, should the
equipment change hands, and let your
contractor check their content in
conjunction with any maintenance and
repair work.
Function diagram
Outside air / ventilation air
Extract air / expelled air
C26_04_01_0199
Connector
Room air temperature sensor
Extract air filter
Countercurrent heat exchanger
Outside air filter
Outside air temperature sensor
Condensate drain connection
User interface
Extractor fan
Control PCB
Outside air fan
Cable entries
1
2
3
4
5
6
7
8
9
10
11
12

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1.3 Control
The remote control enables the operation
of the LWZ 70 between stage 1 and 3. For
this, observe the operating and installation
instructions of the respective remote control.
Stage 2should be treated as the standard
ventilation, stage 3as the demand ventilation,
e.g. party stage (quick ventilation) and stage
1as the minimum setting (for example, when
you are away).
The user control at the device is limited to
switching the device ON and OFF.
Your contractor has set the LWZ 70
specifically to suit the conditions of your home
and to your personal requirements. Never
change any system-specific settings via the
user interface.
Starting
Plug the power supply cable
into the socket and start
the device by simultaneously
pressing programming keys
“OK” and “+”.
(Only possible if the device
was switched off with the
program keys).
On the display, the first figure
represents the position of the
three-stage switch.
Stopping
Stop the device by
simultaneously pressing the
program keys “OK” and “–”.
The display shows OFF.
Pull the power supply plug
from the socket; the device is
now disconnected from the
power supply.
3 seconds
3 seconds
1.2 User interface
The LWZ 70 unit is equipped with a user
interface with LED.
Settings in the program of the central
controller can be called up and modified at
this user interface.
The user interface is equipped with four keys
and one display.
The left area of the display shows the fan
operation or the parameter type.The right
area displays the current value, e.g. air volume.
Example:
The display now indicates that the device is
operating at stage 1 at an air volume of
100 m3/h.
1
2
3
4
5
C26_04_01_0194
C26_04_01_0196
The parameters listed in the table can be
called up with keys “+” and “–”.The display
reverts to the standard operating mode
display if no key is pressed for 5 minutes. Key
“+” enables you to scroll through the menu.
Key “–” only enables the return to parameter
1. Set values cannot be adjusted in this menu.
Parameter Display
(example) Description Note
1 1.100 Current setting/extract air volume [m3/h]
2 C 0 Message code operating mode C0 = No message
C3 = The ventilation air fan runs in the operating mode ‘constant pressure’
C6 = The extract air fan runs in the operating mode ‘constant pressure’
C7 = Correction maximum air volume
3 bP.1 Bypass status (only for integral bypass)
4 tP.9 Outside air temperature [°C] For temperatures below minus (< 0 °C) display tP.9
5 tS.21 Extract air temperature [°C]
6 In.0 No function
1 Display
2 Key “OK” (operate, finished,
reset filter display)
3 Increase parameter value key
4 Function key
5 Reduce parameter value key

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1.4 Maintenance and
cleaning
Maintenance by the user is limited to the
regular cleaning and replacing of the filter.
The filter will only need cleaning when the
respective letter combination “FIL” is shown
on the display, but should be cleaned at
least annually. Never operate the equipment
without the filter.
A contractor should check or clean the heat
exchanger, the condensate drain and the fans
at least once a year.
Cleaning and replacing the filter
1Switch OFF the device via the user
interface. For this, simultaneously press
“OK“ and “–“ for 3 seconds. Remove
both doors.
2This enables you to pull out both filters
and check them for contamination.
Replace the filters if they are heavily
soiled (solid layer of dust on the top of
1
2
3
4
the filter mat). Clean the filters with a
vacuum cleaner, if they are only lightly
soiled.These filters cannot be washed.
Washing would mat the fabric, leaving too
little air to flow through the filter.
3After inserting the filter, close the filter
doors and restart the device via the user
interface (simultaneously press “OK“ and
“+“ for 3 seconds).
Please note:When re-inserting the
filters ensure that the solid, fine
pored side is turned towards the l.h. side,
i.e. towards the heat exchanger.
4Reset the filter status display by pressing
“OK” (1 second).
The display flashes briefly as confirmation
that the filter status has been reset.Then
the operating mode display “operation”
will be shown again.
Please note:All other work on the
equipment must only be carried out
by qualified contractors. Never adjust the
ventilation and extract air valves inside the
rooms.These have been adjusted during
commissioning. Never make any
modifications to the internal equipment
electrics or controls.Trouble-free
operation can only be ensured with a
closed filter door.
C26_04_01_0193

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2. Installation instructions for contractors
2.1 Specification
(The details on the equipment type plate apply)
Type LWZ 70
Part no: 22 14 09
Voltage/Frequency V, Hz 1 / N / PE ~ 230 V / 50 Hz
Max. power consumption A 0.98
Power consumption W 16 - 86
Air volume flow m³/h 50 - 150
Protection level to VDE IP 31
Externally available max. static pressure differential Pa 160 (at 150 m³/h)
Max. ambient temperature °C 60
Dimensions W x H x D mm 560 x 600 x 290
Equipment weight kg 25
Air connections DN Ø 125 (4 pce.)
Filter class G 3
Efficiency - countercurrent heat exchanger % ca. 90
Sound pressure level tested 1 m from the
unit in accordance with EN 255 T7
dB(A) 24.2 (50 m³/h, 40 Pa)
38.5 (100 m³/h, 60 Pa)
45.5 (150 m³/h, 120 Pa)
Accessories Part no:
Filter mat set; content: 10 pce. 22 24 46
Remote control unit FEZ II
Remote control FEQ 18 98 00
Three-stage switch 16 25 51
All ventilation pipes, valves and similar equipment are also available from Stiebel Eltron.

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2.2 Installation
Transport
To protect the equipment against damage, it
must be transported to the installation room
inside its original packaging.
Positioning the equipment
Install the equipment in a suitable location
which is free from frost (as centrally as
possible to achieve the shortest possible air
ducts). For this, unscrew the top two Philips
screws at the back of the equipment, and
secure one of the two rails (G) to the device
using the screws. Fit the other rail as a retainer
to the wall.
Before securing the rail to the wall, ensure
that the wall is sound and strong enough to
bear the weight of the device. Subject to wall
structure, use suitable rawl plugs and screws
to mount the rail to the wall.To prevent
sound transmission, use washers (D) and the
channel section (C) in accordance with detail
X. Before mounting the device by hanging it
into the rail, fit the spacers (E) supplied to the
back of the device.
Fit the equipment so that it is level to ensure
that the condensate drains off properly.
Maintain a distance from the ceiling of at
least 250 mm. Maintain a minimum clearance
towards the wall of 50 mm.
I Ventilation air
II Expelled air
III Extract air
IV Outside air
A Power supply
B Interface for remote control
C Condensate drain
D Channel section (rubber)
E Washer (rubber)
F Spacer
G Rails
F
E
D
C
26_04_01_0205
A
B
26_04_01_0201
Condensate drain connection
The equipment is supplied with an angled
condensate connector and a condensate drain
hose with an internal diameter of 13 mm and
a length of 1500 mm. Insert the condensate
drain connector into the bottom of the
device.
For this, use PTFE tape on the connector
thread.
You can adjust the condensate drain
connector, whilst tightening it, into its required
position.
i
Note: Never kink the hose, to
ensure the condensate drains
perfectly.The slope must be at least 10%,
and the device must be level.
After completing the installation, check
the function, draining capability and water
tightness of the condensate drain. For this,
pour approx. 1 l of water into the condensate
pan.The entire water volume must drain off
swiftly.
D
G
Detail X
min. 10% slope
min. 10% slope

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9
13
21
28
43
63
66
25
37
8
17
54 58
12
15
23
31
48 53
0
0
50
25 50 75 100 125 150 175 200
100
150
200
250
300
Safety instructions
If the dwelling contains combustion equipment
(tiled stoves, fire places, wall mounted gas
heaters, etc.), ensure that such combustion
equipment is supplied with combustion
air separate from the ventilation system
(check with your local flue gas inspector,
as requirements vary across regions and
countries).
When operating a dryer or a cooker hood
that extracts air, ensure also, that a sufficiently
large air volume flow is supplied to that
equipment, independent of the ventilation
equipment.
2.4 Electrical connection
The equipment is supplied fully wired, and
should be plugged into an accessible mains
power socket.
A 1 m long LV cable for the connection of a
remote control is supplied with the device.
Observe VDE 0100 [or local regulations] and
the regulations of your local power supply
utility.
2.4.1 Remote control unit FEZ II
The FEZ II remote control enables the
selection of one of the three preset air flow
rate stages.
The operating mode selector offers the
functions: party, day/night, automatic and
standby (OFF).The programmable analog
time switch controls the changeover between
day and night mode. An indicator signals the
requirement for changing the air filter.
2.4.1 Remote control FEQ (part no: 189800)
The FEQ remote control enables the selection
of the three preset air flow rate stages.
The operating mode selector offers the
functions: party, standard/setback mode,
automatic and standby (OFF).
2.3 Installation on the air
side
The installation is completed with
commercially available slip tubing and profiles.
This installation material may be obtained
from Stiebel Eltron.
During the installation, ensure that no metal
swarf enters the pipe system. However, should
this occur, remove this debris, otherwise the
fans may be damaged.
Thermally insulate these pipelines, if they are
constructed from non-insulated pipes and
profiles.
Where the ventilation air and extract air ducts
are routed through unheated rooms, thermally
insulate those too.
Please note: Never connect cooker
hoods and dryers to the ventilation
system.
Silencers
Generally, fit one silencer each in the
ventilation air and the extract air duct.
Additional silencers are recommended
upstream of bedrooms and living rooms (or in
rooms where noise should be kept down and
where noise transmission should be avoided).
If a room with a high noise level must be
ventilated, install additional silencers in the
approach to and the exit from such rooms
to reduce sound transmission into adjacent
rooms.
Clean-out apertures
Air ducts must be checked and possibly
cleaned at regular intervals. Releasing the air
duct from the device or at the extract air and
ventilation air valves enables the inspection
and cleaning.
External wall outlet
Supply fresh air from a location where
contamination (dust, soot, odours, flue gas,
expelled air) is as low as possible.
When creating the external wall outlet ensure,
that a “short circuit” between the fresh air
inlet and air outlets is avoided. It would be
practical to use our external wall inlet and
outlet grille (part no: 07 18 32).
Ventilation and extract air valves
Ventilation and extract air valves for the living
space are available for wall or ceiling mounting.
During installation, ensure a thorough
ventilation of the room.
Overflow apertures
The living rooms and bedrooms only
receive air, and the rooms loaded with
odour and humidity only have air extracted.
Consequently, fit interconnecting ventilation
grilles into adjoining doors or walls or increase
the air gap below a door to ≥8 mm, to
ensure an unrestricted air flow between
rooms.
2.4.2 Three-stage switch (part no: 162551)
The three-stage switch enables the selection
of the three preset air flow rate stages.
The operating mode selector offers the
functions: party, day and night mode.
2.4.3 Installation of remote control units
Connect the respective remote control,
subject to the equipment-specific operating
and installation instructions or in line with
the connection diagram on page 9, to the
equipment using the device interface and the
connecting cable supplied.
Please note: Route the LV cable of
the remote control units and the
power supply cable of the ventilation
device separately.
2.5 Frost protection
The frost monitoring ensures that the extract
side of the heat exchanger cannot freeze
up.This is achieved by the ventilation air
flow and the extract air flow being brought
out of balance, subject to the outside air
temperature and the pressure at the heat
exchanger.
Fan curve LWZ 70
26_04_01_0202
X Power consumption per fan [W]
Air volume [m³/h]
Static pressure [Pa]

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A Three-stage switch
B Remote control FEZ II
C Remote control FEQ
D Room temperature sensor
E Control PCB
F Ventilation air fan
G Extractor fan
H Outside temperature
sensor
J User interface
A1 brown
A2 blue
A3 green/yellow
A5 white
A10 yellow
Wiring diagram LWZ 70
26_04_01_0209

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Parameter
no.
Display
(Example) Description Note
1 2,100 Current setting/extract air volume [m3/h]
2 C 0 Message code operating mode C0 = No message
C3 = The ventilation air fan runs in the operating mode ‘constant pressure’
C6 = The extract air fan runs in the operating mode ‘constant pressure’’
C7 = Correction maximum air volume
3 bP.1 No function
4 tP.9 Outside air temperature [°C] For temperatures below minus (< 0 °C) display tP.9
5 tS.21 Extract air temperature [°C]
6 In.0 No function
7u.156 Current ventilation air volume [m3/h]
8U.156 Current extract air volume [m3/h]
9 t.180 Current pressure, ventilation air duct [Pa]
10 A.180 Current pressure, extract air duct [Pa]
11 u0.0 Frost protection status 0 = None, 1 t/m 4 = Pressure imbalance, 5 =Ventilation air fan OFF
12 St.9 Expelled air temperature
(sensor not provided as standard)
[°C] If not provided, St.75
13 Pt.18 Ventilation air temperature
(sensor not provided as standard)
[°C] If not provided, Pt.75
2.6 Settings
The four keys on the user interface have the
following functions:
• FFunction key / parameter menu
switching ON and OFF
• +Next parameter / increase value
• –Last parameter / reduce value
• OK Switching the settings menu ON
and OFF / manually resetting faults /
resetting the filter display
Other commands are issued by pressing the
following key combinations.
• F& +(set), Confirm parameter value
• F& –(reset), Resetting the parameter
to the factory default.
• OK & +(ON), Switch ON the device
• OK & –(OFF), Switch OFF the device
In these operating and installation instructions,
every operation using the function keys is
shown as the respective key in inverted
commas and emboldened.
Example: - press “OK”
a Remote control stage
b Extract air volume
2.6.2 Calling-up selected values
Pressing “F” and “OK” simultaneously for
3 seconds enables all available data to be
called up. However, values cannot be adjusted
or modified in this menu.
This menu always opens in parameter 7 (see
the following table). Key “+” enables the data
to be called up, pressing “–” returns you to
parameter 1.
This menu is automatically cancelled if NO
keys are activated for 5 minutes, when the
display shows the standard operating mode
again.
2.6.1 Displaying selected values
This display shows as standard the current fan
stage and the respectively selected extract air
volume (operating mode).The fan stage (stage
1, 2 or 3) is shown on the l.h. side of the
screen and the extract air volume is shown to
the right of the full stop.
In case of faults, the fault number is shown on
the display (see section 2.6 Fault analysis).

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2.6.3 Adjusting the air volume
The air volume of the LWZ 70 for the stages
1 to 3 are factory-set to 50, 100 and
150 m³/h.
Important:
Stage 1: must always be lower than stage 2;
Stage 2: must always be lower than stage 3;
Stage 3: adjustable between 50 and 180 m³/h;
The air volume of the higher stage is
automatically selected if one of the above
conditions is not met.
The air volume can be modified as follows
(as example, the air volume for stage 3 is
increased from 150 to 180 m3/h):
1. Press “F” for 3 seconds
to activate the settings
menu.
2. Select the required
parameter with “+”
U1 = stage 1
U2 = stage 2
U3 = stage 3
3. Press “OK” for 1 second
to display the value of
the selected parameter.
4. Keys “+” or “–” enable
the air flow rate to be
changed.
5.The modified value can now:
Abe saved;
Bnot be saved; or
Creturn to the factory default.
ASimultaneously press
“F” and “+” (first “F”,
then “+”) to save
the modified value;
the modified value
begins to flash 3 x as
confirmation.
Press “OK” to return
to the settings menu;
if required, further
values can now be
changed (see steps
2 to 5).
BPress “OK” to return
to the settings menu
without saving the
modified value; the
previously active
value is maintained.
CSimultaneously press
“F” and “–” to return
to the factory-set
air flow rate. Press
“OK” to return to
the settings menu;
if required, further
values can now be
changed (see steps
2 to 5).
6. Press “F” for 1 second
to exit the settings
menu.

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2.6.4 Changing parameter settings
These parameters must only be changed by
a contractor, as changing these parameter
settings can impair the correct function of the
device.
For factory settings, see the commissioning list
on page 13.
I 1 Pressure imbalance
This enables the creation of a fixed
positive (+) or negative (-) pressure in
the house.The extract air fan ventilates
by a fixed value [m³/h] less than the
ventilation air fan.The extract air fan
ventilates by a fixed value [m³/h] less
than the ventilation air fan.
I 2 Remote control, open switching contact
This parameter determines which fan
stage is activated by an open switching
contact
I 4 Control cable OFF
This parameter determines which fan
stage will be activated with the control
cable OFF.
I 5 Control cable 2
This parameter determines which fan
stage will be activated with the control
cable 2.
I 6 Control cable 3
This parameter determines which fan
stage will be activated with the control
cable 3.
I 7 Is a pressure imbalance permissible?
This determines whether, for example,
the frost protection can interfere with
the pressure balance.
I 3 / I 8 / I 9 / I 11 / I 12 and I 14
For the LWZ 70, these parameters are
without function.
I 10 Constant pressure OFF
This enables the determination whether
the fans should run at a constant flow
rate at all times or whether, if a certain
pressure drop has been exceeded, the
fan changes to constant pressure.
I 13 Filter message
Determines whether the filter message is
shown on the display.
Changing the selected values from the
operating mode “Operation” requires the
following steps: Parameter I7 is used as an
example (change from 1 to 0).
1. Press “F” for 3 seconds
to activate the settings
menu.
2. Simultaneously press
“F” and “OK” for 3 s to
activate the extensive
installer parameter set.
3. Using both “+” and “–”
enables you to
locate the required
parameters.
4. The set value for the
required parameter is
displayed by pressing
“OK”.
5 Keys “+” and “–” enable
the value to be changed.
6. The modified value can now:
A be saved
B not be saved; or
C return to the factory settings
A Simultaneously press
“F” and “+” (first “c”,
then “+”), to save the
modified value; the
modified value flashes
3 x on the display to
confirm it has been
saved; the displayed
modified value is
then maintained.
Press “OK” to return
to the settings menu.
Further values can be
modified (see steps
2 to 5), if required.
B Press “OK” to return
to the settings menu
without saving the
modified value; the
previously active
setting is maintained.
C Simultaneously press
“F” and “–” (first
“F” then “–”), to
return to the factory
default.The factory
setting flashes 3 x
on the display as
confirmation.The
factory default is
maintained, the
modified value is
dismissed. Press
“OK” to return to
the settings menu.
7 Press “F” for 1 second
to exit the settings
menu.

13
Parameter Description Setting range Factory default System value
U 1 Volume stage 1 50.. (max. -10) 50
U 2 Volume stage 2 50.. (max. -5) 100
U 3 Volume stage 3 50 - 180 150
U 4 No function - -
U 5 No function - -
U 8 No function - -
I 1 Fixed pressure imbalance – 100.. + 100 0
I 2 Remote control, open switching contact 0, 1, 2, 3 1
I 3 No function - -
I 4 Control cable OFF 0, 1, 2, 3 0
I 5 Control cable 20, 1, 2, 3 2
I 6 Control cable 30, 1, 2, 3 3
I 7 Pressure imbalance permissible 0, 1 1 (yes)
I 8 No function - -
I 9 No function - -
I10 Constant pressure switched OFF 0, 1 0 (no)
I11 No function - -
I12 No function - -
I13 Filter message ON/OFF 1, 0 1 (ON)
I14 No function 1, 0 0
Fault code Cause Installer action
F2 The ventilation air fan has stopped. Replace the ventilation air fan
F5 The extract air fan has stopped. Replace the extract air fan
F9
Outside air temperature sensor
faulty.
Check the leads from the sensor to the
central control PCB.
Check the lead connection at the sensor.
Replace the sensor.
F10
Extract air temperature sensor
faulty.
Check the leads from the sensor to the
central control PCB.
Check the lead connection at the sensor.
Replace the sensor.
2.7 Fault analysis
When the control unit recognises a fault, the
display will indicate an alpha-numerical code.
Here, fault F9 is shown as an example, that
means there is a fault in the outside air duct.
The device remains in this fault condition until
the respective problem has been resolved.
Afterwards, the device will automatically reset
(auto reset), and the display returns to the
operating mode “Operation”.
The table provides a summary of the types
of faults, their possible causes as well as the
corresponding measures to remove them.
Commissioning report

14
2.8 Maintenance and cleaning
Maintenance by contractors includes the
cleaning of the heat exchanger and the fans .
Subject to operating mode, these maintenance
steps are required every three years.
Switch OFF the device. For this,
simultaneously press “OK” and “–”
for 3 seconds. Pull the mains plug and
remove the filter doors.
Pull out the filter..
Remove the front panel.
Carefully pull the heat exchanger out of
the device using the handle.
Clean the heat exchanger with a solution
of warm water and conventional
washing-up liquid (never use solvents).
Then rinse the heat exchanger with
warm water. Finally, let the heat
exchanger dry.
Remove the user interface.
Pull all plugs from the central control
PCB that are connected with the panel
through which the leads/cables run. Undo
the earth cable from the device body.
Carefully pull the fan housing forwards
and out of the unit; then remove the EPS
enclosure.
Clean fans with compressed air or a
paint brush. During cleaning, ensure
that the vanes are not bent, otherwise
the resulting imbalance would create
additional noise. Never move the
balancing weights on the vanes.
Clean the EPS enclosure with a solution
of warm water and conventional
washing-up liquid (never use solvents)
and flush with clear hot water.Then let
the EPS enclosure dry.
Assemble the device in reverse order:
Fit the EPS enclosure to the fan casing.
Fit the fan casing to the device.
Reconnect the earth cable and reposition
the pulled plugs on the control PCB.
Fit the user interface.
Fit the heat exchanger.
Insert the front panel.
Insert the filters respectively with their clean
side towards the heat exchanger.
Close the filter door.
Reconnect the power supply plug.
Switch ON the device via the user interface
(simultaneously press “OK” and “+” for
3 seconds).
After completing the maintenance and
cleaning work, check all device functions.
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15
Guarantee
For guarantees please refer to the respecti-
ve te rms and conditions of supply for your
country.
The installation, electrical connec- tion and first operation of this ap-
pliance should be carried out by a qualified
installer.
The company does not accept liability for failure of any goods
supplied which have not been installed
and operated inaccordance with the
manufacturer‘s instructions.
Environment and
recycling
Please help us to protect the environment by
disposing of the packaging in accordance with
the national regulations for waste processing.

16
www.stiebel-eltron.com
Stiebel Eltron International GmbH
Dr.-Stiebel-Str. 37603 Holzminden
Telefon [phone]
Fax [phone] - 479
E-Mail [e-mail]
Internet www.stiebel-eltron.com
Belgique
Stiebel Eltron S.p.r.l ./ b.v.b.a.
Rue Mitoyenne 897 B-4840 Welkenraedt
087-88 1465 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.be
C
∨eská republika
Stiebel Eltron spol. s r.o.
K Háju
om 946 C
∨
Z-15500 Praha 5-Stodulky
235 512 122 / 6111 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.cz
Denmark
Distributor:
PETTINAROLI A/S
Mandal Allé 21 DK-5500 Middelfart
6341 6666 Fax: [phone]
E-Mail: [email protected]
Internet www.pettinaroli.dk
France
Stiebel Eltron SAS
7-9, rue des Selliers
BP 85107 F-57073 Metz-Cédex 3
03-87-74 3888 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.fr
Great Britain
Exclusive Distributor:
Applied Energy Products Ltd.
Morley Way GB-Peterborough PE2 9JJ
08709 000420 Fax [phone]
E-Mail [e-mail]
Internet www.applied-energy.com
Magyarország
Stiebel Eltron Kft.
Pacsirtamezo´´ u. 41 H-1036 Budapest
012 50-6055 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.hu
Nederland
Stiebel Eltron Nederland B.V.
Daviottenweg 36
Postbus 2020 NL-5202 CA‘s-Hertogenbosch
073-6 2300 00 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.nl
Austria
Stiebel Eltron Ges.m.b.H.
Eferdinger Str. 73 A-4600 Wels
072 42-47367-0 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.at
Polska
Stiebel Eltron sp.z. o.o
ul. Instalatorów 9 PL-02-237 Warszawa
022-8 4648 20 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.com.pl
Switzerland
Stiebel Eltron AG
Netzibodenstr.23c CH-4133 Pratteln
061-8 169333 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.com
Sverige
Stiebel Eltron AB
Friggagatan 5 SE-641 37 Katrineholm
0150-487900 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron.se
Thailand
Stiebel Eltron Asia Ltd.
469 Moo 2,Tambol Klong-Jik
Amphur Bangpa-In Ayutthaya 13160
035-220088 Fax [phone]
E-Mail [e-mail]
Internet www.stiebeleltronasia.com
USA
Stiebel Eltron Inc.
17 West Street West Hatfield MA 01088
04 13-247-3380 Fax [phone]
E-Mail [email protected]
Internet www.stiebel-eltron-usa.com
Irrtum und technische Änderungen vorbehalten · Subject to errors and technical changes! · Sous réserve d‘erreurs et de modifications techniques! · Onder voorbehoud van vergissingen en technische
wijzigingen! · Correzioni riservati· Salvo error o modificación técnica! · Rätt till misstag och tekniska ändringar förbehålls! · Excepto erro ou alteração técnica · Zastrzeżone zmiany techniczne i ewentualne błędy! ·
Omyly a technické změny jsou vyhrazeny!
·
A muszaki változtatások és tévedések jogát fenntartjuk!
·
Boэможность неточностей итехнических изменений не исключается!
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