STIEBEL ELTRON DCE-X 6/8 Premium Instruction Manual

OPERATION AND INSTALLATION
UTILISATION ET INSTALLATION
ЭКСПЛУАТАЦИЯ И УСТАНОВКА

Fully electronically controlled compact instantaneous water heater
Chauffe-eau instantané compact à régulation entièrement électronique
Малогабаритный проточный нагреватель с полным электронным управлением

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CONTENTS
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������4
1.1 Safety instructions����������������������������������������������� 4
1.2 Other symbols in this documentation ����������������������� 4
1.3 Units of measurement ������������������������������������������ 4
2. Safety����������������������������������������������������������4
2.1 Intended use������������������������������������������������������ 4
2.2 General safety instructions ������������������������������������ 4
2.3 Test symbols ������������������������������������������������������ 5
3. Appliance description ���������������������������������������5
4. Settings and displays ����������������������������������������5
4.1 User interface ���������������������������������������������������� 5
4.2 Display symbols�������������������������������������������������� 5
4.3 Setting the temperature���������������������������������������� 6
4.4 Internal anti-scalding protection (qualified contractors) 6
4.5 Setting the Tmax temperature limit (childproofing) ������ 6
4.6 Assigning values to the temperature memory buttons �� 6
4.7 Inlet temperature information �������������������������������� 6
4.8 Info menu ��������������������������������������������������������� 6
4.9 Settings in the parameter menu������������������������������ 7
4.10 Recommended settings ���������������������������������������� 9
5. Cleaning, care and maintenance ���������������������������9
6. Troubleshooting ����������������������������������������������9
INSTALLATION
7. Safety�������������������������������������������������������� 10
7.1 General safety instructions ����������������������������������� 10
7.2 Instructions, standards and regulations ������������������� 10
8. Appliance description ������������������������������������� 10
8.1 Standard delivery����������������������������������������������� 10
8.2 Accessories������������������������������������������������������� 10
9. Preparation ������������������������������������������������� 10
9.1 Installation site�������������������������������������������������� 10
9.2 Minimum clearances������������������������������������������� 11
9.3 Water installation����������������������������������������������� 11
10. Installation�������������������������������������������������� 11
10.1 Standard installation on finished walls �������������������� 11
11. Commissioning ��������������������������������������������� 13
11.1 Internal anti-scalding protection via jumper slot �������� 13
11.2 Changing the connected load via the jumper slot�������� 13
11.3 Initial start-up��������������������������������������������������� 13
11.4 Recommissioning����������������������������������������������� 14
12. Appliance shutdown ��������������������������������������� 14
13. Alternative installation methods ������������������������� 14
13.1 Electrical connection from above on unfinished walls�� 14
13.2 Electrical connection from below on unfinished walls�� 14
13.3 Electrical connection on unfinished walls with short
power cable������������������������������������������������������ 15
13.4 Electrical connection from the side on finished walls��� 15
13.5 Water installation on unfinished walls ��������������������� 15
13.6 Operation with preheated water ���������������������������� 16
14. Service information���������������������������������������� 16
15. Troubleshooting �������������������������������������������� 17
15.1 Fault code display ���������������������������������������������� 17
16. Maintenance ������������������������������������������������ 18
17. Specification ������������������������������������������������ 18
17.1 Dimensions and connections��������������������������������� 18
17.2 Wiring diagram ������������������������������������������������� 18
17.3 DHW output������������������������������������������������������ 19
17.4 Application areas/ conversion table ����������������������� 19
17.5 Pressure drop ��������������������������������������������������� 19
17.6 Fault conditions ������������������������������������������������� 19
17.7 Energy consumption data������������������������������������� 19
17.8 Data table �������������������������������������������������������� 20
GUARANTEE
ENVIRONMENT AND RECYCLING

SPECIAL INFORMATION
ENGLISH
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SPECIAL INFORMATION
- The appliance may be used by children aged3
and older and persons with reduced physical,
sensory or mental capabilities or a lack of ex-
perience and know-how, provided that they
are supervised or they have been instructed
on how to use the appliance safely and have
understood the potential risks. Children must
never play with the appliance. Cleaning and
user maintenance must not be carried out by
children without supervision.
- The tap can reach temperatures of up to
70°C. There is a risk of scalding at outlet tem-
peratures in excess of 43°C.
- The appliance is suitable for supplying a
shower (shower operation). If the appliance
is also or exclusively used for shower opera-
tion, the qualified contractor must adjust the
temperature setting range to 55°C or less
using the internal anti-scalding protection on
the appliance. When using preheated water,
ensure that the inlet temperature does not ex-
ceed 55°C.
- Ensure the appliance can be separated from
the power supply by an isolator that discon-
nects all poles with at least 3mm contact
separation.
- The specified voltage must match the power
supply.
- The appliance must be connected to the earth
conductor.
- The appliance must be permanently connect-
ed to fixed wiring.
- Secure the appliance as described in chapter
"Installation/ Installation".
- Observe the maximum permissible pressure
(see chapter "Installation/ Specification/ Data
table").
- The specific water resistivity of the mains
water supply must not be undershot (see
chapter "Installation/ Specification/ Data
table").
- Drain the appliance as described in chapter
"Installation/ Maintenance/ Draining the
appliance".

OPERATION
General information
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OPERATION
1. General information
The chapters "Special information" and "Operation" are intended
for both users and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note
Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
!
KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
 Steps to prevent the risk are listed.
1.1.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
1.1.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous or minor injury.
1.2 Other symbols in this documentation
Note
General information is identified by the adjacent symbol.
 Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.3 Units of measurement
Note
All measurements are given in millimetres unless oth-
erwise stated.
2. Safety
2.1 Intended use
This appliance is suitable for heating domestic hot water or for
reheating preheated water. The appliance can supply one or more
draw-off points.
Water will not be reheated if the maximum inlet temperature for
reheating is exceeded.
The appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in non-do-
mestic environments, e.g. in small businesses, as long as it is
used in the same way.
Any other use beyond that described shall be deemed inappro-
priate. Observation of these instructions and of the instructions
for any accessories used is also part of the correct use of this
appliance.
2.2 General safety instructions
CAUTION Burns
During operation, the tap can reach temperatures in ex-
cess of 70°C.
There is a risk of scalding at outlet temperatures in ex-
cess of 43°C.
CAUTION Burns
If operating the appliance with preheated water,
e.g.from a solar thermal system, the DHW temperature
may differ from the selected set temperature.
!
WARNING Injury
The appliance may be used by children aged3 and older
and persons with reduced physical, sensory or mental ca-
pabilities or a lack of experience and know-how, provid-
ed that they are supervised or they have been instructed
on how to use the appliance safely and have understood
the potential risks. Children must never play with the
appliance. Cleaning and user maintenance must not be
carried out by children without supervision.
!
!

OPERATION
Appliance description
ENGLISH
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Where children or persons with limited physical, sensory or men-
tal abilities are allowed to use this appliance, we recommend a
permanent temperature limit. The following options are available
for limiting the temperature:
- Set by user: Temperature limit (childproofing)
- Set by qualified contractor: "Internal anti-scalding
protection".
!
Material losses
The user should protect the appliance and its tap against
frost.
2.3 Test symbols
See type plate on the appliance.
3. Appliance description
The appliance switches on automatically as soon as you open the
hot water valve on the tap. When you close the tap, the appliance
switches off again automatically.
The appliance heats water as it flows through it. The DHW outlet
temperature can be variably adjusted. From a certain flow rate,
the control unit regulates the correct heating output, subject to
the temperature selected and the current cold water temperature.
The compact instantaneous water heater with full electronic con-
trol and automatic output matching maintains a consistent outlet
temperature. The fully electronic control unit with motorised valve
ensures the water is accurately heated to the selected tempera-
ture. This occurs regardless of the inlet temperature.
If the appliance is operated with preheated water and the inlet
temperature exceeds the selected set temperature, the inlet tem-
perature is indicated on the second display line and flashes. The
water is not heated further.
The compact instantaneous water heater with full electronic con-
trol allows you to save different set temperatures and call them
up quickly. In the ECO function, the integral motorised valve limits
the flow rate to 3preset levels. The appliance is equipped with
functions for permanent temperature limiting (childproofing).
The backlight automatically switches on as soon as water flows
through the appliance or a change is made at the user interface.
If no changes are made for 30seconds or water has stopped being
drawn off for 5seconds, the backlight automatically switches off
again.
DHW temperature
The DHW outlet temperature can be variably adjusted. The select-
ed temperature is shown on the display.
Heating system
The bare wire heating system is enclosed within a pressure-tested
plastic jacket. The heating system with its stainless steel heater
spiral is suitable for hard and soft water areas and is largely in-
susceptible to scale build-up. The heating system ensures rapid
and efficient DHW provision.
Note
The appliance is equipped with an air detector that large-
ly prevents damage to the heating system. If, during op-
eration, air is drawn into the appliance, the appliance
shuts down heating operation for one minute to protect
the heating system.
4. Settings and displays
4.1 User interface
D0000073619
2
3
1
8
5
6
7
4
1 Temperature selector
2 Operating LED (flashes when output limit is reached)
3 Temperature memory keys
4 Backlit display
5 Main display | info display | parameter display
6 Segment display [10 - 100%]
7 Second display line
8 "i" button to call up information and select menus
4.2 Display symbols
The symbols are shown on the display when activated.
7
8
1 2 6543
D0000073618
1 Wellness showers
2 Automatic water volume control
3 ECO display
4 Tmax, displayed when temperature limit is enabled
5 Consumption indicator
6 Time
7 Operating lock [ON/ OFF]
8 Spanner symbol, appears in the event of a fault

OPERATION
Settings and displays
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4.3 Setting the temperature
D0000073619
2
1
1 Set temperature selector (no end-stop): OFF, 20 - 60°C
2 To call up/assign preferred temperatures
Settings
Setting Step Setting Step
20°C ... 60°C 0.5°C 68°F ... 140°F 1°F
4.4 Internal anti-scalding protection (qualified
contractors)
If required, the qualified contractor can set a permanent temper-
ature limit, for example in nurseries, hospitals,etc.
When supplying a shower, the appliance temperature setting
range must be adjusted by the qualified contractor to 55°C or less.
If the anti-scalding protection function is enabled and the tem-
perature limit is reached, "Tmax" flashes.
4.5 Setting the Tmax temperature limit
(childproofing)
You can adjust the temperature limit individually. If the tempera-
ture limit is enabled, "Tmax" is shown on the display.
4.5.1 Enabling the temperature limit
See chapter "Settings in the parameter menu".
4.5.2 Disabling the temperature limit
 Proceed as per menu item "Enabling the temperature limit".
 Turn the temperature selector to "OFF".
4.6 Assigning values to the temperature memory
buttons
Memory buttons "1" and "2" can each be assigned a preferred
temperature.
 Select the preferred temperature.
 To save the preferred temperature, press and hold button
"1" or "2" for more than 3seconds. The selected temperature
flashes once to confirm.
4.7 Inlet temperature information
If the appliance is operated with preheated water and the inlet
temperature exceeds the selected set temperature, the inlet tem-
perature is indicated on the second display line and flashes. The
water is not heated further.
4.8 Info menu
The appliance has an additional display where consumption values
can be shown.
4.8.1 Calling up the info menu
 Briefly press "i" until "i1" appears, then continue to press "i"
to see further menus.
 Exit the menu item by pressing "i" and holding for more than
5seconds. Alternatively: The system exits the menu item au-
tomatically 30seconds after the setting has been completed.
Menu Description Explanation Screen | display
I1 Flow rate The current flow rate
is shown.
Flow rate in l/min or
gpm
I2 Time The current time is
shown.
Time
I3 Energy consump-
tion
The amount of en-
ergy consumed is
shown.
Value in kWh
I4 Water consump-
tion
The amount of water
consumed is shown.
Value in m³ | gal
Note
The consumption values are calculated starting from the
last reset.

OPERATION
Settings and displays
ENGLISH
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4.9 Settings in the parameter menu
4.9.1 Activating the parameter menu
 Briefly press and hold "i" for more than 5seconds until "P1"
appears, then continue by briefly pressing "i".
 In the selected parameter menu, turn the temperature selec-
tor to the required display/ setting.
4.9.2 Parameter menu
Menu Description Selectable display | setting Explanation Symbol | display
P1 ECO OFF | ECO1 | ECO2 | ECO3 ECO water and energy saving function:
The ECO function enables you to limit the
flow rate to a maximum value.
– | | |
P2 Temperature limit (child-
proofing)
Temperature (in selected temperature
unit)
Childproofing allows you as a user to
limit the adjustable temperature at the
appliance to a maximum value. Check
that the upper temperature limit has
been correctly applied.
P3 Wellness showers [OFF,
1 - 4]
OFF | 1 | 2 | 3 | 4 The Wellness shower program lets you
choose from different programs for hot/
cold contrast showers.
P4 Automatic water volume
control – set the volume
in the selected unit
OFF | 5 | 10 | ... 200l or 2 ... 52gal The automatic water volume control
allows you to limit the volume of water
at a high flow rate. When the selected
volume of water is reached, the control
automatically reduces the flow rate. The
required temperature is maintained. The
automatic water volume control must be
enabled on each occasion prior to filling
the bath.
P5 Temperature unit C | F Select the temperature unit for all set-
tings.
°C| °F
P6 Volume unit L | GAL Select the volume unit for all settings. l | gal
P7 Time format 24h | 12h
P8 Time setting --:-- Setting for the selected time format. AM | PM (only for 12h)
P9 Operating lock ON | OFF Operation blocked (only when ON)
P10 Reset to factory settings Reset ( ) To reset, see chapter "Further informa-
tion on the parameter menu/ Description
P10".
P11 Resetting the consump-
tion values
Reset ( |
To reset, see chapter "Further informa-
tion on the parameter menu/ Description
P11".
P12 Backlighting Auto | On Enable either continuous illumination, or
automatic illumination when buttons are
pressed or water is drawn off.
P13 Reduce backlighting 100% | 50% ( ) Adjustable display backlighting.
4.9.3 Deactivating the parameter menu
 Exit the menu item by pressing "i" and holding for more than
5seconds. Alternatively: The system exits the menu item au-
tomatically 30seconds after the setting has been completed.

OPERATION
Settings and displays
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4.9.4 Further information on the parameter menu
P1: ECO water and energy saving function
The ECO function enables you to limit the flow rate to a maximum
value.
ECO level Display
shows
Flow rate limitation
ECO1 6l/min
ECO2 5l/min
ECO3 4l/min
OFF No symbol No flow rate limit
P2: Temperature limit (childproofing)
The temperature limit allows you as a user to restrict the ad-
justable temperature at the appliance to a maximum value. Your
qualified contractor can set an additional temperature limit for
anti-scalding protection. This temperature then dictates the upper
limit of the setting range for the temperature limit function.
P3: Wellness showers
The Wellness shower program lets you choose between 4 differ-
ent hot/cold contrast showers.
WW = warm water, KW = cold water
min = minutes, sec = seconds
Shown in °C
- 1 Cold prevention
To strengthen the body, we recommend finishing off with a cold
shower; this will trigger a reflex in the body to warm up.
WW
KW
3min
- 2 Winter pick-me-up
An invigorating end to a winter shower with a final warm-up.
WW
WW
3 min 10 sec
10 sec 10 sec 10 sec
WW - 10°C | 50°F
- 3 Summer fitness program
A quick contrast shower to increase fitness with a final warm-up.
WW
KW
3min 10 sec
10 sec
10 sec
10 sec
- 4 Circulation boost program
Shower your arms and legs with cold water to boost circulation.
Spray from the hands and feet towards the body. You can then
repeat this process with hot water.
WW
KW
3min 30 sec
20 sec
30 sec
20 sec
P4: Automatic water volume control
The automatic water volume control allows you to limit the volume
of water at a high flow rate. When the selected volume of water
is reached, the control automatically reduces the flow rate. The
required temperature is maintained. The automatic water volume
control must be enabled on each occasion prior to filling the bath.
Example, filling a bath with 80litres (21gallons): When the bath
has been filled with 80litres (21gallons) of water, the control
automatically reduces the flow rate to 4l/min (1gpm).
P5: Setting the temperature unit
Select the temperature unit for all settings.
P6: Setting the volume unit
Select the volume unit for all settings.
P7: Setting the time format
Select the time format for all settings.
P8: Setting the time
You can set the time using the 12 or 24hour clock:
- 12hours from 00:00 - 11:59= AM | 11:59 - 00:00= PM
- 24hours from 00:00 to 23:59
After a power cut, the time needs to be set again.
P9: Operating lock
You can set the operating lock to "ON" or "OFF".
To disable the set operating lock:
 Press and hold "i" for more than 10seconds.
P10: Resetting to factory settings
In menu item "P13", the appliance can be reset to its factory
settings. "rSEt" is shown on the display.
 Press and hold "1" and "2" simultaneously for more than
5seconds. The display switches to "On" to confirm the reset.
 To confirm "On", press and hold "i" for more than 5seconds.
P11: Resetting the consumption values
In menu item "P14", the consumption values can be reset. "rSEt"
is shown on the display.
 Press and hold "1" and "2" simultaneously for more than
5seconds. The display switches to "On" to confirm the reset.
 To confirm "On", press and hold "i" for more than 5seconds.
P12: Adjusting the backlighting
The display backlighting is adjustable.
- The backlighting switches on whenever the appliance is in
heating mode or when the user interface is operated.
- If there is no operation for 30seconds, the backlighting
switches off.
- If you select "On", the backlighting will remain on constantly.
P13: Reduce backlighting
There are 2 brightness levels for the backlighting: 100% | 50%

OPERATION
Cleaning, care and maintenance
ENGLISH
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4.10 Recommended settings
Your instantaneous water heater offers maximum precision and
maximum convenience in DHW provision. Should you nonetheless
operate the appliance with a thermostatic valve, we recommend
that you:
 Adjust the set temperature on the appliance to over 50°C.
Then set the required set temperature on the thermostatic
valve.
Saving energy
The following recommended settings will result in the lowest en-
ergy consumption:
- 38°C for hand washbasins, showers, bath
- 55°C for kitchen sinks
Internal anti-scalding protection (qualified contractors)
If required, the qualified contractor can set a permanent temper-
ature limit, for example in nurseries, hospitals,etc.
Recommended setting for operation with a thermostatic valve
and water preheated by solar energy
 Set the temperature at the appliance to the maximum
temperature.
Following an interruption to the water supply
!
Material losses
To ensure that the bare wire heating system is not dam-
aged following an interruption to the water supply, the
appliance must be restarted by taking the following steps.
 Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
 Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
 Switch the power back ON.
5. Cleaning, care and maintenance
 Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
 Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.
6. Troubleshooting
Problem Cause Remedy
The appliance will not
start despite the DHW
valve being fully open.
There is no power. Check the fuses/ MCBs in
your fuse box/ distribu-
tion board.
The aerator in the tap
or the shower head is
scaled up or dirty.
Clean and/or descale the
aerator or shower head.
The water supply has
been interrupted.
Vent the appliance and
the cold water inlet line.
When hot water is being
drawn off, cold water
flows for a short period.
The air sensor is detect-
ing air in the water. It
briefly switches off the
heating output.
The appliance restarts
automatically after
1minute.
The required tempera-
ture cannot be set.
The high limit safety
cut-out and/or internal
anti-scalding protection
is enabled.
Deactivate the temper-
ature limit. The internal
anti-scalding protection
can only be adjusted by a
qualified contractor.
The flow rate is too low. ECO function is enabled. Select a different ECO
level or disable the ECO
function.
Note
The information shown on the programming unit and the
selected settings are retained following a power failure
(with the exception of the time).
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
Nr.: 000000-0000-00000
D0000073621

INSTALLATION
Safety
10 | DCE-X Premium www.stiebel-eltron.com
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
!
Material losses
Observe the maximum inlet temperature. Higher tem-
peratures may damage the appliance. You can limit the
maximum inlet temperature by installing a central ther-
mostatic valve.
WARNING Electrocution
This appliance contains capacitors which are discharged
when disconnected from the power supply. The capacitor
discharge voltage may briefly exceed60VDC.
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
- Protection rating IP25 (hose-proof) is guaranteed only if
appropriate cable grommets and O-rings are fitted on the
45°twin connectors.
- The electrical resistivity of the water must not fall below that
stated on the type plate. In a linked water network, take into
consideration the lowest electrical resistivity of the water.
Your water supply utility will advise you of the electrical re-
sistivity or conductivity of the water in your area.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
- 2 x 45° twin connectors
- 2 flat gaskets
- 2 O-rings
- Cable grommet
- Strainer
- Jumper for anti-scalding protection, attached
- Jumper for output changeover, attached
8.2 Accessories
Taps
- MEKD mono lever kitchen pressure tap
- MEBD mono lever bath pressure tap
Installation kit for water installation on unfinished walls
The following accessories are required for water installation on
unfinished walls:
- 2 x grommets to seal the apertures in the appliance back
panel.
- Strainer with sealed edge for installation on the 45°twin
connector.
- Flat gasket
Central thermostatic valve (ZTA3/4)
Use the thermostatic valve for central premixing, for example
when operating an instantaneous water heater with preheated
water. For use in shower operation, the valve must be set to a
maximum of 55°C.
9. Preparation
9.1 Installation site
!
Material losses
Install the appliance in a room that is free from the risk
of frost.
 Always install the appliance vertically and near the draw-off
point.
The appliance is suitable for undersink and oversink installation.
Undersink installation
D0000073616
1
2
1 Cold water inlet
2 DHW outlet
Oversink installation
12
D0000073617
1 Cold water inlet
2 DHW outlet

INSTALLATION
Installation
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 11
Note
 Install the appliance flush to the wall. The wall must
have sufficient load bearing capacity.
9.2 Minimum clearances
≥50≥50
≥50
≥100
D0000079442
 Maintain the minimum clearances to ensure trouble-free op-
eration of the appliance and facilitate maintenance work.
9.3 Water installation
!
Material losses
Carry out all water connection and installation work in
accordance with regulations.
 Flush the water line thoroughly.
Taps
Use appropriate pressure taps. Open vented taps are not per-
missible.
Permissible water line materials
- Cold water inlet line:
Pipes made from galvanised steel, stainless steel, copper or
plastic
- DHW outlet line:
Pipes made from stainless steel, copper or plastic
!
Material losses
If plastic pipework systems are used, take into account
the maximum inlet temperature and the maximum per-
missible pressure.
Flow rate
 Ensure that the flow rate for switching on the appliance is
achieved.
 If the required flow rate is not achieved when the draw-off
valve is fully open, increase the water line pressure.
10. Installation
Factory settings 
Premium

Premium
Internal anti-scalding protection in °C 60 60
Connected load in kW @ 220V 8.0 12.0
@ 230V 8.7 13.1
@ 240V 9.6 14.3
Standard installation 
Premium

Premium
Electrical connection from below, installa-
tion on finished walls from below
x x
Water connection, installation on finished
walls
x x
For further installation options, see chapter "Alternative instal-
lation methods".
10.1 Standard installation on finished walls
Opening the appliance
D0000073641
 Open the appliance by undoing the screw and lifting up the
appliance cover.
Preparing the power cable
B
A
D0000077179
 Prepare the power cable.
Position on finished walls Dimension A Dimension B
Bottom, centre 30 120
Bottom, left side of appliance 20 90
Bottom, right side of appliance 20 90
Top, right side of appliance 20 80
Position on unfinished walls Dimension A Dimension B
Bottom 20 90
Top 20 80

INSTALLATION
Installation
12 | DCE-X Premium www.stiebel-eltron.com
Preparation
D0000073843
3
2
1
5
6
4
1 Strainer
2 O-rings
3 45° twin connector
4 Flat gaskets
5 Locking screws
6 Cable grommet
 Undo the locking screws.
D0000085450
 Push/break out the required apertures where marked on the
appliance back panel for the power cable and twin connec-
tors. Use a suitable flat tool when doing so. Deburr any sharp
edges with a file.
 Remove the transport protection plugs from the water con-
nection pipes.
 Cut a hole in the cable grommet to fit the selected connecting
cable. Fit the cable grommet.
 Fit the O-rings into the groove on the twin connectors.
 Push the twin connectors into the apertures in the appliance
back panel and fit them to the appliance connection pipes
using flat gaskets.
 Secure the twin connectors with the locking screws.
 Insert the strainer in the twin connector of the cold water
connection.
Installing the appliance
 Push/break out the slots for securing the appliance marked in
the lower part of the appliance back panel (for positions, see
chapter "Specification/ Dimensions and connections").
 Mark out the 4holes for drilling with reference to the appli-
ance back panel.
 Drill the holes and secure the appliance using suitable fixing
materials (screws and rawl plugs are not part of the standard
delivery): Countersunk screw, Ø4.5mm, max. diameter of
screw-head 9mm.
D0000073844
 Fit a suitable pressure tap.
 Fit the water supply pipes for the valve (not included in
standard delivery) to the twin connectors using the flat
gaskets.
 Open the shut-off valve in the cold water inlet line.
Making the electrical connection
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Electrocution
The connection to the power supply is only permissible
as a permanent connection in conjunction with the re-
movable cable grommet. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3mm contact separation.
WARNING Electrocution
Ensure that the appliance is earthed.
!
Material losses
Observe the type plate. The specified rated voltage must
match the mains voltage.
 Push the power cable through the cable grommet.
 Connect the power cable to the mains terminal (see chapter
"Installation/ Specification/ Wiring diagram").

INSTALLATION
Commissioning
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 13
11. Commissioning
11.1 Internal anti-scalding protection via jumper
slot
43°C | 109°F
50°C | 122°F
55°C | 131°F
60°C | 140°F
D0000073624
Jumper position Description
43°C | 109°F Forexample in nurseries, hospitals, etc.
50°C | 122°F
55°C | 131°F Max. for shower operation
60°C | 140°F Factory setting
No jumper Limit 43°C | 109°F
 Install the jumper in the required position on the "Tmax" pin
strip.
CAUTION Burns
If the appliance is supplied with preheated water, the
internal anti-scalding protection and the user-adjustable
temperature limit may be exceeded.
In such cases, limit the temperature with an upstream
central thermostatic valve (ZTA3/4).
11.2 Changing the connected load via the jumper
slot
If you select a connected load other than the factory setting for
the appliance, you will need to reposition the jumper.
1
2
D0000082938
 Install the jumper in the required position on the "Pmax" pin
strip.
Jumper position Connected load

Connected load

1 @ 220V 6.0kW 10.0kW
@ 230V 6.6kW 11.0kW
@ 240V 7.2kW 12.0kW
2@ 220V 8.0kW 12.0kW
@ 230V 8.7kW 13.1kW
@ 240V 9.6kW 14.3kW
No jumper @ 220V 6.0kW 10.0kW
@ 230V 6.6kW 11.0kW
@ 240V 7.2kW 12.0kW
11.3 Initial start-up
 Tick the selected connected load on the type plate. Use a
ballpoint pen to do this.
≥ 60 s
D0000053277
 Open and close all connected draw-off valves several times,
until all air has been purged from the pipework and the
appliance.
 Carry out a tightness check.
D0000073622
 Activate the safety switch by firmly pressing the reset button
(the appliance is delivered with the safety switch disabled).
D0000073623
 Insert the plug of the programming unit connecting cable at
the PCB.
Note
It is essential to plug the connecting cable for the pro-
gramming unit into the PCB before switching on the
power. Otherwise, the programming unit will not func-
tion.

INSTALLATION
Appliance shutdown
14 | DCE-X Premium www.stiebel-eltron.com
D0000073642
 Hook the appliance cover into the appliance back panel at the
top rear. Pivot the appliance cover downwards. Check that
the appliance cover is securely seated both top and bottom.
 Secure the appliance cover with the screw.
 Remove the protective film from the user interface.
D0000053281
 Switch on the power supply.
 Ensure that the programming unit is functioning correctly.
11.3.1 Appliance handover
 Explain the appliance function to users and familiarise them
with how it works.
 Make the user aware of potential dangers, especially the risk
of scalding.
 Hand over the instructions.
11.4 Recommissioning
!
Material losses
To ensure that the bare wire heating system is not dam-
aged following an interruption to the water supply, the
appliance must be restarted by taking the following steps.
 Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
 Open the tap for at least one minute until the appli-
ance and its upstream cold water inlet line are free
of air.
 Switch the power back ON.
12. Appliance shutdown
 Isolate all poles of the appliance from the power supply.
 Drain the appliance (see chapter "Maintenance/ Draining the
appliance").
13. Alternative installation methods
WARNING Electrocution
Before performing any work on the appliance, discon-
nect all poles from the power supply.
13.1 Electrical connection from above on unfinished
walls
D0000073620
2
1
1 Cable grommet
2 Cable routing
 Break out the required aperture in the back panel for the
power cable (for positions, see chapter "Specification/ Di-
mensions and connections"). Deburr any sharp edges with a
file.
 Cut a hole in the cable grommet to fit the selected connecting
cable. Fit the cable grommet.
 Reposition the mains terminal from the bottom to the top.
To do so, unclip the mains terminal by pushing it firmly to
the left and pulling it forwards. Turn the mains terminal with
connecting cables 180° clockwise. Lay the internal wiring
under the cable guide. Clip the mains terminal in by pushing
it inwards and to the left until it clicks into place.
 Install the appliance and connect the power cable to the
mains terminal as described in chapter "Installation/ Stand-
ard installation on finished walls".
13.2 Electrical connection from below on unfinished
walls
D0000079465
1
1 Cable grommet

INSTALLATION
Alternative installation methods
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 15
 Break out the required aperture in the back panel for the
power cable (for positions, see chapter "Specification/ Di-
mensions and connections"). Deburr any sharp edges with a
file.
 Cut a hole in the cable grommet to fit the selected connecting
cable. Fit the cable grommet.
 Install the appliance and connect the power cable to the
mains terminal as described in chapter "Installation/ Stand-
ard installation on finished walls".
13.3 Electrical connection on unfinished walls with
short power cable
If the power cable is not quite long enough, you can install the
mains terminal in the appliance a little closer to the aperture.
D0000073648
1
1 Cable grommet
 Reposition the mains terminal from the top to the bottom. To
do so, unclip the mains terminal by pushing it firmly to the
left and pulling it forwards. Clip the mains terminal in at the
bottom by pushing it inwards and to the left until it clicks
into place.
13.4 Electrical connection from the side on finished
walls
 Cut and break out the required aperture in the appliance
back panel and appliance cover for the power cable (for po-
sitions, see chapter "Specification/ Dimensions and connec-
tions"). Deburr any sharp edges with a file.
 Install the appliance and connect the power cable to the
mains terminal as described in chapter "Installation/ Stand-
ard installation on finished walls".
13.5 Water installation on unfinished walls
You will need the appropriate accessories to carry out the in-
stallation. The installation kit for water installation on unfinished
walls contains:
- 2 x grommets to seal the apertures in the appliance back
panel.
- Strainer with sealed edge for installation on the 45°twin
connector.
- Flat gasket
Preparation
44-46
D0000073660
 Insert and seal the 45°twin connectors.
To break out the apertures in the appliance back panel, you will
need to remove the function module from the back panel.
1.
4.
5.
2.
3.
D0000077971
 Undo the screw and disengage the locking tab.
 Push the function module on the back panel gently
backwards.
 Remove the function module from the appliance back panel
by pulling it slightly forwards and lifting it out.
 Push/break out the required apertures for the water connec-
tions in the back panel from behind (for positions, see chap-
ter "Specification/ Dimensions and connections"). Deburr any
sharp edges with a file.
 Fit the function module in reverse order onto the appliance
back panel until it clicks into place.
 Secure the function module with the screw.

INSTALLATION
Service information
16 | DCE-X Premium www.stiebel-eltron.com
Installing the appliance
D0000073842
321
1 Grommets
2 Flat gasket
3 Strainer with sealed edge
 Mark out the 2holes for drilling with reference to the appli-
ance back panel.
 Fit the grommets in the appliance back panel from the front.
 Drill the holes and secure the appliance using suitable fixing
materials (screws and rawl plugs are not part of the standard
delivery): Countersunk screw, Ø4.5mm, max. diameter of
screw-head 9mm.
Note
 Install the appliance flush to the wall. If necessary,
additionally secure the appliance at the 2 lower at-
tachment points.
 Remove the transport protection plugs from the water con-
nection pipes.
 Secure the DHW connection pipe with a flat gasket and the
cold water inlet line with the sealed-edge strainer (from the
accessories) to the twin connectors.
13.6 Operation with preheated water
You can limit the maximum inlet temperature by installing a cen-
tral thermostatic valve.
14. Service information
Connection overview/ component overview
D0000077189
1
2
3
4
5
6
7
1 Motorised valve
2 Flow meter
3 High limit safety cut-out, automatic reset
4 NTC sensor
5 Pin strips for connected load and anti-scalding protection
6 Programming unit plug-in position
7 Diagnostic traffic lights

INSTALLATION
Troubleshooting
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 17
15. Troubleshooting
WARNING Electrocution
Before performing any work on the appliance, discon-
nect all poles from the power supply.
Note
When testing the appliance using the diagnostic traffic
lights, water must be flowing.
Signals of the diagnostic traffic lights (LED)
Red Lights up in the event of a fault
Yellow Lights up in heating mode/flashes when output limit
reached
Green Flashing: Appliance connected to power supply
Diagnostic traffic
lights
Fault Cause Remedy
No LED illuminates. The appliance does not heat
up.
There is no power. Check the fuse/MCB in your fuse box/distribution
board.
The PCB is faulty. Replace the function module.
Green flashing, yellow
off, red off
No DHW The shower head/ aerators are scaled up. Descale or replace the shower head/ aerators if
necessary.
The strainer in the cold water inlet is dirty. Clean the strainer.
The flow meter is not plugged in. Connect the cable to the PCB.
The flow meter is faulty. Replace the flow meter.
The PCB is faulty. Replace the function module.
Green flashing, yellow
on, red off
The display on the program-
ming unit is off.
There is a loose cable between the PCB and the pro-
gramming unit.
Check the cable and plug the cable into the program-
ming unit and/or PCB.
The cable of the programming unit is faulty. Check the cable and replace if necessary.
The programming unit PCB is faulty. Check the programming unit and replace if neces-
sary.
Green flashing, yellow
on, red off
The outlet temperature does
not match the set value.
The programming unit was not plugged in before
power was switched on.
Perform a reset by switching off the power to the
appliance.
The outlet sensor is faulty. Replace the outlet sensor.
The heating system is faulty. Replace the function module.
The PCB is faulty. Replace the function module.
Green flashing, yellow
off, red on
The outlet temperature does
not match the set value.
The safety switch is not enabled during "Initial start-
up".
Activate the safety switch by firmly pressing the reset
button.
The safety switch has responded. Remedy the cause and activate the safety switch.
Not all phases are connected to the appliance. Check the fuses/ MCBs.
The outlet sensor is faulty. Replace the outlet sensor.
15.1 Fault code display
If there is a fault on the appliance, a flashing spanner is displayed.
 To call up the fault code, press and hold the "i" button for
longer than 5seconds.
Display shown Cause
E1 Fault in electronic safety circuit.
E2 Break or short circuit in inlet sensor.
E3 Short circuit in outlet sensor.

INSTALLATION
Maintenance
18 | DCE-X Premium www.stiebel-eltron.com
16. Maintenance
WARNING Electrocution
Before performing any work on the appliance, discon-
nect all poles from the power supply.
Draining the appliance
The appliance can be drained for maintenance work.
WARNING Burns
Hot water may escape when you drain the appliance.
 Close the shut-off valve in the cold water inlet line.
 Open all draw-off valves.
 Undo the water connections on the appliance.
 Store the dismantled appliance free from the risk of frost, as
water residues remaining inside the appliance can freeze and
cause damage.
Cleaning the strainer
If the strainer in the threaded cold water fitting is dirty, clean it.
Close the shut-off valve in the cold water inlet line before remov-
ing, cleaning and refitting the strainer.
17. Specification
17.1 Dimensions and connections
372
358 343
14
97
217
140
175
100
c01c06
35
32
109
b02
380
D0000073693
DCE-X
Premium
b02 Entry for electrical cables I Finished walls
c01 Cold water inlet Male thread G 1/2 A
c06 DHW outlet Male thread G 1/2 A
Alternative connection options
100
c01c06
b02
72
330
b02
b02
69
35
336
b02
b03
30
61
15
b03
D0000073720
DCE-X
Premium
b02 Entry for electrical cables I Finished walls
b03 Entry for electrical cables II Unfinished walls
c01 Cold water inlet Male thread G 1/2 A
c06 DHW outlet Male thread G 1/2 A
17.2 Wiring diagram
DCE-X Premium
L L 2/GRD ~ 220 - 240 V
L N
1/N/PE ~ 220 - 240V
N
L
L
L
D0000077991
1
3
4
2
1 Power PCB with integral safety switch
2 Bare wire heating system
3 High limit safety cut-out
4 Mains terminal

INSTALLATION

ENGLISH
www.stiebel-eltron.com DCE-X Premium | 19
17.3 DHW output
The DHW output is subject to the connected power supply, the
appliance's connected load and the cold water inlet temperature.
The rated voltage and rated output can be found on the type plate.
Connected load in kW 
Rated voltage Cold water inlet temperature
      
6.0 2.6 3.1 3.7 4.8
8.0 3.5 4.1 5.0 6.3
6.6 2.9 3.4 4.1 5.2
8.7 3.8 4.4 5.4 6.9
7.2 3.1 3.7 4.5 5.7
9.6 4.2 4.9 6.0 7.6
10.0 4.3 5.1 6.2 7.9
12.0 5.2 6.1 7.5 9.5
11.0 4.8 5.6 6.8 8.7
13.1 5.7 6.7 8.1 10.4
12.0 5.2 6.1 7.5 9.5
14.3 6.2 7.3 8.9 11.3
Connected load in kW 
Rated voltage Cold water inlet temperature
      
6.0 1.9 2.1 2.4 2.9
8.0 2.5 2.9 3.3 3.8
6.6 2.1 2.4 2.7 3.1
8.7 2.8 3.1 3.6 4.1
7.2 2.3 2.6 2.9 3.4
9.6 3.0 3.4 3.9 4.6
10.0 3.2 3.6 4.1 4.8
12.0 3.8 4.3 4.9 5.7
11.0 3.5 3.9 4.5 5.2
13.1 4.2 4.7 5.3 6.2
12.0 3.8 4.3 4.9 5.7
14.3 4.5 5.1 5.8 6.8
17.4 Application areas/ conversion table
Electrical resistivity and electrical conductivity.
Standard specifica-
  
Resis-
tivity
ρ≥
Conductivity σ≤ Resis-
tivity
ρ≥
Conductivity σ≤ Resis-
tivity
ρ≥
Conductivity σ≤
Ωcm mS/m μS/cm Ωcm mS/m μS/cm Ωcm mS/m μS/cm
1100 91 910 970 103 1031 895 112 1117
17.5 Pressure drop
Taps

Mono lever mixer tap, approx. MPa 0.04 - 0.08
Thermostatic valve, approx. MPa 0.03 - 0.05
Shower head, approx. MPa 0.03 - 0.15
Sizing the pipework
When calculating the size of the pipework, an appliance pressure
drop of 0.1MPa is recommended.
17.6 Fault conditions
In the event of a fault, loads up to 80°C at a pressure of 1.0MPa
can occur briefly in the installation.
17.7 Energy consumption data
Product datasheet: Conventional water heaters to regulation (EU)
no. 812/2013 | 814/2013
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238158 238159
Manufacturer STIEBEL ELTRON STIEBEL ELTRON
Load profile XS XS
Energy efficiency class A A
Energy conversion efficiency %39 39
Annual power consumption kWh 472 473
Default temperature setting °C 60 60
Sound power level dB(A) 15 15
Special information on measuring
efficiency
Measured at
ECO level with
highest flow
rate, maximum
output and max-
imum set value.
Measured at
ECO level with
highest flow
rate, maximum
output and max-
imum set value.
Daily power consumption kWh 2.161 2.167

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17.8 Data table
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238158 238159
Electrical data
Rated voltage V220 230 240 220 230 240
Rated output kW 6.0/8.0 6.6/8.7 7.2/9.6 10.0/12.0 11.0/13.1 12.0/14.3
Rated current A27.3/36.4 28.5/38.0 30.0/40.0 45.5/54.5 47.8/57.0 50.0/59.6
Fuse protection A30/40 50/60
Frequency Hz 50/60 50/60
Phases 1/N/PE 1/N/PE
Resistivity ρ15 ≥ Ω cm 1100 1100
Conductivity σ15 ≤ μS/cm 910 910
Max. mains impedance at 50Hz Ω 0.0385 0.0368 0.0353 0.0257 0.0294 0.0235
Connections
Water connection G 1/2 A G 1/2 A
Application limits
Max. permissible pressure MPa 1 1
Max. inlet temperature for reheating °C 55 55
Temperature setting range °C Off, 20 - 60 Off, 20 - 60
Values
Max. inlet temperature (e.g. pasteurisation) °C 70 70
On l/min 1.3 1.3
Flow rate at 28K l/min 3.1/4.1 @ 220V 5.1/6.2 @ 220V
Flow rate at 50K l/min 1.7/2.3 @ 220V 2.9/3.5 @ 220V
Pressure drop for flow rate at 50K (without flow limiter) MPa 0.007/0.009 0.02/0.026
Hydraulic data
Nominal capacity l0.277 0.277
Versions
Type of installation Oversink/ undersink Oversink/ undersink
Adjustable connected load X X
Protection class 1 1
Insulating block Plastic Plastic
Heating system heat generator Bare wire Bare wire
Cover and back panel Plastic Plastic
Colour White White
IP rating IP25 IP25
Dimensions
Height mm 372 372
Width mm 217 217
Depth mm 109 109
Weights
Weight kg 2.50 2.50
Note
The appliance conforms to IEC 61000-3-12.
Guarantee
The guarantee conditions of our German companies do not
apply to appliances acquired outside of Germany. In countries
where our subsidiaries sell our products a guarantee can only
be issued by those subsidiaries. Such guarantee is only grant-
ed if the subsidiary has issued its own terms of guarantee. No
other guarantee will be granted.
We shall not provide any guarantee for appliances acquired in
countries where we have no subsidiary to sell our products.
This will not aect warranties issued by any importers.
Environment and recycling
We would ask you to help protect the environment. After use,
dispose of the various materials in accordance with national
regulations.
GUARANTEE
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