STIEBEL ELTRON DCE-X 6-12 Premium 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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





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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

www.stiebel-eltron.com DCE-X Premium | 3

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

4 | DCE-X Premium www.stiebel-eltron.com

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

www.stiebel-eltron.com DCE-X Premium | 5

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

6 | DCE-X Premium www.stiebel-eltron.com

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

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

- 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

8 | DCE-X Premium www.stiebel-eltron.com

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

www.stiebel-eltron.com DCE-X Premium | 9

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

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

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

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

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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