STIEBEL ELTRON DCE-X 6-12 Premium Operation Instruction

Taper
Operation Instruction
OPERATION AND INSTALLATION
UTILISATION ET INSTALLATION
OPERACIÓN E INSTALACIÓN
RUKOVANJE I INSTALACIJA
ΧΕΙΡΙΣΜΌΣ ΚΑΙ ΕΓΚΑΤΑΣΤΑΣΗ
ЭКСПЛУАТАЦИЯ И УСТАНОВКА

Fully electronically controlled compact instantaneous water heater | Chauffe-eau
instantané compact à régulation entièrement électronique | Calentador instantáneo
compacto con regulación completamente electrónica | Potpuno elektronički regulirani
kompaktni protočni grijač | Πλήρως ηλεκτρονικά ελεγχόμενος κόμπακτ στιγμιαίος θερμαντήρας
ροής | 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 �������������������������������������������������� 6
4.3 Selecting the set temperature ��������������������������������� 6
4.4 Temperature limit via internal anti-scalding
protection (qualified contractor)������������������������������ 6
4.5 Temperature limit Tmax (user) �������������������������������� 6
4.6 Assigning 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 ���������������������������������������� 8
5. Cleaning, care and maintenance ���������������������������8
6. Troubleshooting ����������������������������������������������9
INSTALLATION
7. Safety ���������������������������������������������������������� 9
7.1 General safety instructions ������������������������������������ 9
7.2 Shower operation������������������������������������������������ 9
7.3 Instructions, standards and regulations �������������������� 9
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 ������������������������������������������� 10
9.3 Water installation ����������������������������������������������� 10
10. Installation �������������������������������������������������� 11
10.1 Standard installation on finished walls ��������������������11
11. Commissioning ��������������������������������������������� 12
11.1 Internal anti-scalding protection via jumper slot �������� 12
11.2 Changing the connected load via the jumper slot ��������12
11.3 Initial start-up ��������������������������������������������������� 12
11.4 Recommissioning ����������������������������������������������� 13
12. Appliance shutdown ��������������������������������������� 13
13. Installation alternatives ����������������������������������� 13
13.1 Electrical connection from above on unfinished walls �� 13
13.2 Electrical connection from below on unfinished walls �� 14
13.3 Electrical connection with short power cable ������������ 14
13.4 Electrical connection from the side on finished walls ��� 14
13.5 Water installation on unfinished walls ��������������������� 14
13.6 Operation with preheated water ���������������������������� 15
14. Service information ���������������������������������������� 15
15. Troubleshooting �������������������������������������������� 16
15.1 Fault code display ���������������������������������������������� 16
16. Maintenance ������������������������������������������������ 17
16.1 Draining the appliance ���������������������������������������� 17
16.2 Cleaning the strainer ������������������������������������������� 17
17. Specification ������������������������������������������������ 18
17.1 Dimensions and connections ��������������������������������� 18
17.2 Wiring diagram ������������������������������������������������� 18
17.3 DHW output ������������������������������������������������������ 18
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 over
3years of age and persons with reduced
physical, sensory or mental capabilities or a
lack of experience and expertise, provided
that they are supervised or they have been
instructed on how to use the appliance safe-
ly 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.
- During operation, the tap can reach tempera-
tures up to 70°C. There is a risk of scalding at
outlet temperatures 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 application limits (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 these 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.
f 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.
f Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
f 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 mm unless otherwise
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 up
to 70°C.
There is a risk of scalding at outlet temperatures in ex-
cess of 43°C.
CAUTION Burns
If children or persons with limited physical, sensory or
mental capabilities use the appliance, set a temperature
limit. Once set, check the temperature limit is working
correctly.
If a permanent and unchangeable temperature limit is
required, have the internal anti-scalding protection set
by a qualified contractor.
!
!
OPERATION
Appliance description
ENGLISH
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CAUTION Burns
If operating with preheated water, e.g. if using a solar
thermal system, observe the following information:
The DHW temperature may exceed the set temperature
or a set temperature limit.
f In this case, limit the temperature with an upstream
central thermostatic valve.
!
WARNING Injury
The appliance may be used by children over 3years of
age and persons with reduced physical, sensory or men-
tal capabilities or a lack of experience and expertise,
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.
!
Material losses
The user should protect the appliance and its tap against
frost.
Note
In order to comply with protection rating IP25, coun-
tersunk screws must be used to secure the appliance to
the wall.
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 set tempera-
ture is adjustable. Upwards of a certain flow rate, the control unit
selects the required heating output, subject to the temperature
selected and the 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 temperature, the inlet tempera-
ture is indicated on the second display line and flashes. The water
is not heated further.
You can store 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 has setting options for a
temperature limit (Tmax function, user) and internal anti-scald-
ing protection (qualified contractor). The backlight switches on
automatically as soon as water starts to flow through the appli-
ance or you make a change on the user interface. The backlight
switches off automatically after water stops flowing or if no action
is performed.
Heater
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 output for one minute to protect the
heating system.
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 recommissioned by taking the follow-
ing steps.
f Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f Vent the appliance and the cold water inlet line (see
chapter "Installation/ Commissioning/ Initial start-
up").
f Switch on the power supply again.
4. Settings and displays
4.1 User interface
D0000073619
2
3
1
8
5
6
7
4
1 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
OPERATION
Settings and displays
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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
4.3 Selecting the set temperature
D0000073619
2
1
1 Set temperature settings: 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 Temperature limit via internal anti-scalding
protection (qualified contractor)
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 Temperature limit Tmax (user)
You can adjust the temperature limit individually. If the tempera-
ture limit is enabled, "Tmax" is shown on the display.
Activating/deactivating the temperature limit Tmax
See chapter "Settings in the parameter menu".
4.6 Assigning temperature memory buttons
Memory buttons "1" and "2" can each be assigned a preferred
temperature.
f Select the preferred temperature.
f 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
f Briefly press "i" until "i1" appears, then continue to press "i"
to see further menus.
f 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 Explanations 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 or 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
f Briefly press and hold "i" for more than 5seconds until "P1"
appears, then continue by briefly pressing "i".
f 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
Explanations Symbol |
display
P1
ECO water and energy
saving function
OFF | ECO1 | ECO2 | ECO3
The ECO function enables you to limit the flow rate to a maximum
value.
Flow rate limit:
6l/min with "ECO1" | 5l/min with "ECO2" | 4l/min with "ECO3" |
No flow rate limit with "OFF".
|
|
|
P2
Temperature limit Tmax
OFF | 20.0 | 20.5 ...°C or
68 | 69 ...°F
The temperature limit allows you as a user to restrict the adjustable
set temperature at the appliance to a maximum value. Check that the
upper temperature limit has been correctly applied.
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
OFF | Pro1 | Pro2 | Pro3|
Pro4
The Wellness shower program lets you choose from 4 different alter-
nating shower programs.
WW = domestic hot water, KW = cold water, min = minutes,
sec = seconds
- 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 refreshment
An invigorating end to a winter shower with a final warm-up.
WW
KW
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 – set the volume
in the selected unit
OFF | 5 | 10 | ... 200l or
2... 52gal
With the automatic water volume control, you can preselect a volume
of water, e.g. for filling a bathtub. When the preselected water volume
is reached, the automatic control reduces the flow rate. The automatic
water volume control must be enabled on each occasion prior to fill-
ing the bath.
Example, filling a bath with 80litres (21gallons): When the bath has
been filled with 80litres (21gallons), the control automatically reduc-
es the flow rate to 4l/min (1gpm).
P5 Temperature unit C | F Select the temperature unit for all settings. °C| °F
P6 Volume unit L | GAL Select the volume unit for all settings. l | gal
P7 Time format 24h | 12h Select time format.
P8
Time setting
--:--
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.
AM | PM (only
for 12h)
OPERATION
Cleaning, care and maintenance
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Menu Description Selectable display |
setting
Explanations Symbol |
display
P9
Operating lock
ON | OFF
You can set the operating lock to "ON" or "OFF".
To disable the set operating lock:
f Press and hold "i" for more than 12seconds.
(only when
ON)
P10
Reset to factory settings
Reset ( )
You can restore the appliance to its factory settings. "rSEt" is shown
on the display.
f Press "1" and "2" simultaneously and hold for longer than 5sec-
onds. The display switches to "On" to confirm the reset.
f To confirm "On", press and hold "i" for more than 5seconds.
P11
Resetting the consump-
tion values
Reset ( | )
You can reset the consumption values. "rSEt" is shown on the display.
f Press "1" and "2" simultaneously and hold for longer than 5sec-
onds. The display switches to "On" to confirm the reset.
f To confirm "On", press and hold "i" for more than 5seconds.
P12
Backlighting
Auto | On
You can adjust the display backlight.
- If "Auto" is selected, the backlight is switched on during heating
operation and each time an action is performed. If no action is per-
formed for 30seconds, the backlight is switched off again.
- If you select "On", the backlight will remain on constantly.
P13 Reduce backlighting 100% | 20% ( ) You can select 2levels of brightness for the backlight.
4.9.3 Deactivating the parameter menu
f 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.
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:
f 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
f Set the temperature at the appliance to the maximum
temperature.
5. Cleaning, care and maintenance
f Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
f Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.
ENGLISH
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OPERATION | INSTALLATION
Troubleshooting
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
(see chapter "Installa-
tion/ Commissioning/
Initial start-up").
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.
Boiling noises are heard
during operation.
The appliance is not
vented.
Vent the appliance (see
chapter "Installation/
Commissioning/ Initial
start-up").
The supply pressure is
too low.
Ensure that the mini-
mum supply pressure is
achieved (see chapter
"Installation/ Specifica-
tion/ Data table").
No settings can be made
on the programming
unit.
The operating lock is
enabled.
To deactivate the oper-
ating lock, press the "i"
button for more than
12seconds.
Note
Programming unit displays and selected settings are re-
tained 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
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 Shower operation
CAUTION Burns
f When supplying a shower, set the internal an-
ti-scalding protection to 55°C or less; see chapter
"Commissioning/ Preparations".
CAUTION Burns
If operating with preheated water, e.g. if using a solar
thermal system, observe the following information:
The DHW temperature may exceed the set temperature
or a set temperature limit.
f In this case, limit the temperature with an upstream
central thermostatic valve.
7.3 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
- The protection rating IP25 (hoseproof) is only guaranteed
with a properly fitted cable grommet and the use of counter-
sunk screws Ø4.5mm with a max. head diameter of 9mm.
- 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.
INSTALLATION
Appliance description
10 | DCE-X Premium www.stiebel-eltron.com
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
- 2 x 45° twin nipples
- 2 flat gaskets
- 2 O-rings
- Cable grommet
- Strainer
- Jumper for anti-scalding protection, attached
- Jumper for output changeover, attached
8.2 Accessories
Installation kit for water installation on unfinished walls
(200016 - UP-Kit EU)
The installation kit for water installation on unfinished walls con-
tains:
- 2 x grommets to seal the apertures in the appliance back
panel.
- Strainer with sealed edge for installation on the 45°twin
nipple.
- Flat gasket
9. Preparation
9.1 Installation site
!
Material losses
Install the appliance in a room that is free from the risk
of frost.
f 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
D0000073617
12
1 Cold water inlet
2 DHW outlet
Note
f Install the appliance flush to the wall. The wall must
have sufficient load bearing capacity.
9.2 Minimum clearances
≥50≥50
≥50
≥100
D0000079442
f 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.
f Flush the water line thoroughly.
Fittings
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.
INSTALLATION
Installation
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 11
Flow rate
f Ensure that the flow rate for switching on the appliance is
achieved.
f 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
f Open the appliance by undoing the screw and lifting up the
appliance cover.
Preparing the power cable
B
A
D0000077179
f 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
Preparation
D0000073843
3
2
1
5
6
4
1 Strainer
2 O-rings
3 45° twin nipple
4 Flat gaskets
5 Locking screws
6 Cable grommet
f Undo the locking screws.
D0000085450
f Push/break out the required apertures where marked on the
appliance back panel for the power cable and twin nipples.
Use a suitable flat tool when doing so. Deburr any sharp
edges with a file.
f Remove the transport protection plugs from the water con-
nection pipes.
f Cut a hole in the cable grommet to fit the selected connecting
cable. Fit the cable grommet.
f Fit the O-rings into the groove on the twin nipples.
f Push the twin nipples into the apertures in the appliance
back panel and fit them to the appliance connection pipes
using flat gaskets (torque 8Nm).
f Secure the twin nipples with the locking screws.
f Insert the strainer in the twin nipple of the cold water
connection.
Installing the appliance
f Push/break out the lower slots (175mm apart) in the back
panel for securing the appliance (for positions, see chapter
"Specification/ Dimensions and connections"). The upper two
fixing holes are already open.
f Mark out the 4drilling positions with reference to the appli-
ance back panel.
f 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.
INSTALLATION
Commissioning
12 | DCE-X Premium www.stiebel-eltron.com
D0000073844
f Fit a suitable pressure tap.
f Fit the water supply pipes for the valve (not included in
standard delivery) to the twin nipples using the flat gaskets.
f 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 connected to the earth con-
ductor.
!
Material losses
Observe the type plate. The specified rated voltage must
match the power supply.
f Push the power cable through the cable grommet.
f Connect the power cable to the mains terminal (see chapter
"Installation/ Specification/ Wiring diagram").
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
f Install the jumper in the required position on the "Tmax" pin
strip.
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
CAUTION Burns
If operating with preheated water, e.g. if using a solar
thermal system, the internal anti-scalding protection and
the temperature limit Tmax, which can be set by the user,
may be exceeded.
f In this case, limit the temperature with an upstream
central thermostatic valve.
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
f Install the jumper in the required position on the "Pmax" pin
strip.
Jumper position Connected load

Premium

Premium
1 [low] @ 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 [high]
@ 220V 8.0kW 12.0kW
Factory setting
@ 230V 8.7kW 13.1kW
@ 240V 9.6kW 14.3kW
No jumper [low]
@ 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
f Tick the selected connected load on the type plate. Use a
ballpoint pen to do this.
≥ 3 min.
on
15 x
off
D0000101520
f Open and close all connected draw-off valves 15 times
over a period of at least 3 minutes, until all air has been
purged from the pipework and the appliance. Vent the cold
water inlet line and the appliance using a flow rate of least
3.5l/min.
INSTALLATION
Appliance shutdown
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 13
f Carry out a tightness check.
D0000073622
f Activate the safety switch by firmly pressing the reset button
(the appliance is delivered with the safety switch disabled).
D0000073623
f 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.
D0000073642
f 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.
f Secure the appliance cover with the screw.
f Remove the protective film from the user interface.
D0000053281
f Switch on the power supply.
f Ensure that the programming unit is functioning correctly.
11.3.1 Appliance handover
f Explain the appliance function to users and familiarise them
with how it works.
f Make users aware of potential dangers, especially the risk of
scalding.
f 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 recommissioned by taking the follow-
ing steps.
f Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f Vent the appliance and the cold water inlet line (see
chapter "Commissioning/ Initial start-up").
f Switch on the power supply again.
12. Appliance shutdown
f Isolate all poles of the appliance from the power supply.
f Drain the appliance (see chapter "Maintenance/ Draining the
appliance").
13. Installation alternatives
WARNING Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
13.1 Electrical connection from above on unfinished
walls
D0000073620
2
1
1 Cable grommet
2 Cable routing
f 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.
f Cut a hole in the cable grommet to fit the selected connecting
cable. Fit the cable grommet.
f 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.
f Install the appliance and connect the power cable to the
mains terminal as described in chapter "Installation/ Stand-
ard installation on finished walls".
INSTALLATION
Installation alternatives
14 | DCE-X Premium www.stiebel-eltron.com
Note
Disconnecting the mains terminal at the top:
f Use a screwdriver to disengage the locking tab from
the right-hand side.
13.2 Electrical connection from below on unfinished
walls
D0000079465
1
1 Cable grommet
f 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.
f Cut a hole in the cable grommet to fit the selected connecting
cable. Fit the cable grommet.
f 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 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
f 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
f 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.
f 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
nipple.
- Flat gasket
Preparation
44-46
D0000073660
f Insert and seal the 45°twin nipples.
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
f Undo the screw and disengage the locking tab.
f Push the function module on the back panel gently
backwards.
INSTALLATION
Service information
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 15
f Remove the function module from the appliance back panel
by pulling it slightly forwards and lifting it off.
f 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.
f Fit the function module on the appliance back panel in re-
verse order until it clicks into place.
f Secure the function module with the screw.
Installing the appliance
D0000073842
321
1 Grommets
2 Flat gasket
3 Strainer with sealed edge
f Mark out the 2drilling positions in the upper section of the
appliance back panel with reference to the appliance back
panel.
f Fit the grommets in the appliance back panel from the front.
f 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
f Install the appliance flush to the wall. If necessary,
additionally secure the appliance at the 2 lower
attachment points. To do this, push/break out the
lower slots (175mm apart) in the appliance back
panel (for positions, see chapter "Specification/ Di-
mensions and connections").
f Remove the transport protection plugs from the water con-
nection pipes.
f 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 nipples.
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
16 | DCE-X Premium www.stiebel-eltron.com
15. Troubleshooting
WARNING Electrocution
To test the appliance, it must be connected to 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 (draw-off
mode)
Fault Cause Remedy
No LED illuminates Appliance does not heat up
One or more power supply phases are missing Check the fuses in the distribution board
PCB faulty Replace the function module
Green flashing, yellow
off, red off
No DHW
Appliance starting flow rate not reached; shower
head/aerator scaled up
Descale/replace the shower head/aerator
Appliance starting flow rate not reached; strainer in
cold water inlet dirty
Cleaning the strainer
Flow meter not plugged in Check plug-in connection; correct if necessary
Flow meter faulty or dirty Replace flow meter
PCB faulty Replace the function module
Green flashing, yellow
on, red off
No display
Loose connecting cable between PCB and program-
ming unit
Check plug-in connections; correct if necessary
Faulty connecting cable between PCB and program-
ming unit
Check connecting cable; replace if necessary
Programming unit faulty Replace programming unit
PCB faulty Replace the function module
Green flashing, yellow
on, red off
No DHW; outlet temperature
does not match set value
Tap faulty Replace tap
Programming unit connected to the PCB after switch-
ing on the power supply
Switch the fuses in the distribution board off and
back on again
Outlet sensor faulty Replace outlet sensor
Heating system faulty Replace the function module
PCB faulty Replace the function module
Green flashes, yellow
flashes, red off
No DHW; outlet temperature
does not match set value
Control limit of the motorised valve reached Reduce the set temperature
Faulty motorised valve Replacing the motorised valve
Green flashing, yellow
off, red on
No DHW; outlet temperature
does not match set value
Air detection has responded Continue draw-off for >1 min
15.1 Fault code display
If there is an appliance fault, the spanner flashes on the display.
f To call up the fault code display, press the "i" button for more
than 5seconds.
Diagnostic traffic
lights (draw-off
mode)
Display shown Fault Cause Remedy
Green flashing, yellow
off, red on
Spanner flashes (fault code
display E1 and spanner)
No DHW; outlet temperature
does not match set value
Safety switch not activated during
"Commissioning"
Activate the safety switch by firmly
pressing the reset button
Safety switch was triggered by high
limit safety cut-out
Check high limit safety cut-out (plug-in
connection, connecting cable); activate
safety switch
Safety switch responds again after high
limit safety cut-out has been checked;
high limit safety cut-out faulty
Replace high limit safety cut-out; ac-
tivate safety switch and draw-off with
maximum set value >1min
Safety switch responds again; PCB
faulty
Replace the function module
Green flashing, yellow
off, red on
Spanner flashes (fault code
display E2 and spanner)
No DHW PCB faulty (lead break or short circuit
in inlet sensor)
Replace the function module
Green flashing, yellow
off, red on
Spanner flashes (fault code
display E3 and spanner)
No DHW Short circuit in outlet sensor Check outlet sensor; replace if neces-
sary
INSTALLATION
Maintenance
ENGLISH
www.stiebel-eltron.com DCE-X Premium | 17
16. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
This appliance contains capacitors which are discharged
when disconnected from the power supply. The capacitor
discharge voltage may briefly exceed60VDC.
16.1 Draining the appliance
The appliance can be drained for maintenance work.
WARNING Burns
Hot water may escape when you drain the appliance.
f Close the shut-off valve in the cold water inlet line.
f Open all draw-off valves.
f Undo the water connections on the appliance.
f Store the dismantled appliance free from the risk of frost, as
water residues remaining inside the appliance can freeze and
cause damage.
16.2 Cleaning the strainer
WARNING Burns
Hot water may escape when you drain the appliance.
!
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 recommissioned by taking the follow-
ing steps.
f Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f Vent the appliance and the cold water inlet line (see
chapter "Commissioning/ Initial start-up").
f Switch on the power supply again.
The strainer in the cold water threaded fitting must be cleaned
regularly.
16.2.1 Cleaning the strainer, standard installation on finished
walls
f Isolate the appliance from the power supply.
f Close the shut-off valve in the cold water inlet line.
f Open all draw-off valves.
f Remove the cold water threaded fitting.
f Remove the strainer from the twin nipple using a flat-blade
screwdriver. Clean the strainer.
f Reinsert the strainer. Screw the cold water connection pipe
onto the twin nipple.
f Open the shut-off valve in the cold water inlet line.
f Vent the appliance and the cold water inlet line (see chapter
"Commissioning/ Initial start-up").
f Switch on the power supply.
16.2.2 Cleaning the strainer, installation on unfinished walls
f Isolate the appliance from the power supply.
f Close the shut-off valve in the cold water inlet line.
f Open all draw-off valves.
f Open the appliance by undoing the screw and lifting up the
appliance cover.
f Unscrew the cold water connection pipe from the twin nip-
ple. Pivot the cold water connection pipe upwards.
f Remove the strainer from the twin nipple. Clean the strainer.
f Screw the cold water connection pipe and the strainer with
sealed edge onto the twin nipple.
f Open the shut-off valve in the cold water inlet line.
f Vent the appliance and the cold water inlet line (see chapter
"Commissioning/ Initial start-up").
f Check the cold water connection for leaks.
f 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.
f Switch on the power supply.
INSTALLATION

18 | DCE-X Premium www.stiebel-eltron.com
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 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 electrical cables I Finished walls
b03 Entry 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
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
      
DCE-X 6/8 Premium
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
DCE-X 10/12 Premium
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
      
DCE-X 6/8 Premium
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
DCE-X 10/12 Premium
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
INSTALLATION

ENGLISH
www.stiebel-eltron.com DCE-X Premium | 19
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
Fittings

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
 
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 maximum set value.
Measured at ECO level with highest flow rate,
maximum output and maximum set value.
Daily power consumption kWh 2.161 2.167
20 | DCE-X Premium www.stiebel-eltron.com


17.8 Data table
 
238158 238159
Electrical data
Rated voltage V 220 230 240 220 230 240
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 A 27.3/36.4 28.5/38.0 30.0/40.0 45.5/54.5 47.8/57.0 50.0/59.5
Fuse protection A 30/40 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 0.0245 0.0235
Connections
Water connection G 1/2 A G 1/2 A
Application limits
Minimum supply pressure MPa 0.18 (1.8 bar / 26 psi) 0.18 (1.8 bar / 26 psi)
Max. permissible pressure MPa 1 (10 bar / 150 psi) 1 (10 bar / 150 psi)
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 0.01/0.01 0.02/0.03
Hydraulic data
Nominal capacity l 0.277 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 2.5 2.5
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.
GUARANTEEGUARANTEE
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STIEBEL ELTRON DCE-X 6-12 Premium Operation Instruction

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Operation Instruction