STIEBEL ELTRON DHB-E 11 LCD Instruction Manual

BEDIENUNG UND INSTALLATION
OPERATION AND INSTALLATION
UTILISATION ET INSTALLATION
BEDIENING EN INSTALLATIE
OBSLUHA A INSTALACE

Elektronisch geregelter Komfort-Durchlauferhitzer | Electronically controlled
comfort instantaneous water heater | Chauffe-eau instantané confort à régulation
électronique| Elektronisch geregelde comfort-doorstromer | Elektronicky
regulovaný komfortní průtokový ohřívač| 
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ENGLISH
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CONTENTS
SPECIAL INFORMATION
OPERATION
1. General information ��������������������������������������� 27
1.1 Safety instructions���������������������������������������������� 27
1.2 Other symbols in this documentation ���������������������� 27
1.3 Units of measurement ����������������������������������������� 27
2. Safety�������������������������������������������������������� 27
2.1 Intended use����������������������������������������������������� 27
2.2 General safety instructions ����������������������������������� 27
2.3 Test symbols ����������������������������������������������������� 28
2.4 EU Declaration of Conformity �������������������������������� 28
3. Appliance description ������������������������������������� 28
4. Settings and displays�������������������������������������� 28
4.1 Selecting the set temperature�������������������������������� 28
4.2 Recommended settings ��������������������������������������� 29
5. Cleaning, care and maintenance ������������������������� 29
6. Troubleshooting �������������������������������������������� 29
INSTALLATION
7. Safety�������������������������������������������������������� 30
7.1 General safety instructions ����������������������������������� 30
7.2 Shower operation�����������������������������������������������30
7.3 Instructions, standards and regulations �������������������30
8. Appliance description ������������������������������������� 30
8.1 Standard delivery�����������������������������������������������30
8.2 Accessories������������������������������������������������������� 30
9. Preparation ������������������������������������������������� 31
9.1 Installation location �������������������������������������������� 31
9.2 Minimum clearances������������������������������������������� 31
9.3 Water installation����������������������������������������������� 31
10. Installation�������������������������������������������������� 32
10.1 Standard installation������������������������������������������� 32
11. Commissioning ��������������������������������������������� 35
11.1 Preparation ������������������������������������������������������ 35
11.2 Initial start-up��������������������������������������������������� 35
11.3 Recommissioning�����������������������������������������������36
12. Appliance shutdown ��������������������������������������� 36
13. Alternative installation methods ������������������������� 36
13.1 Electrical connection from above on unfinished walls�� 36
13.2 Electrical connection on unfinished walls with short
power cable������������������������������������������������������ 36
13.3 Electrical connection on finished walls �������������������� 37
13.4 Connecting a load shedding relay��������������������������� 37
13.5 Water installation on finished walls ������������������������ 37
13.6 Water installation on finished walls with solder/
press-fit fittings ������������������������������������������������� 37
13.7 Fitting appliance cover over water installation on
finished walls����������������������������������������������������38
13.8 Lower back panel section installation with threaded
fittings on finished walls ��������������������������������������38
13.9 Wall mounting bracket when replacing appliance������� 38
13.10 Installation with offset tiles�����������������������������������38
13.11 Pivoting appliance cover �������������������������������������� 38
13.12 Operation with preheated water ���������������������������� 39
13.13 Horizontal installation of the appliance �������������������� 39
14. Service information���������������������������������������� 39
15. Troubleshooting �������������������������������������������� 40
16. Maintenance ������������������������������������������������ 41
17. Specification ������������������������������������������������ 41
17.1 Dimensions and connections��������������������������������� 41
17.2 Wiring diagram ������������������������������������������������� 41
17.3 Domestic hot water output ����������������������������������� 42
17.4 Application areas/ Conversion table ����������������������� 42
17.5 Pressure drop ��������������������������������������������������� 42
17.6 Fault conditions ������������������������������������������������� 42
17.7 Energy consumption data������������������������������������� 43
17.8 Data table �������������������������������������������������������� 43
GUARANTEE
ENVIRONMENT AND RECYCLING

SPECIAL INFORMATION
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SPECIAL INFORMATION
- The appliance may be used by children aged3
and older and persons with reduced physical,
sensory or mental capabilities or a lack of ex-
perience and know-how, provided that they
are supervised or they have been instructed
on how to use the appliance safely and have
understood the potential risks. Children must
never play with the appliance. Children must
never clean the appliance or perform user
maintenance unless they are supervised.
-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,
it must be ensured that the inlet temperature
does not exceed 55°C.
- Ensure the appliance can be separated from
the power supply by an isolator that discon-
nects all poles with at least 3mm contact
separation.
- The specified voltage must match the power
supply.
- The appliance must be connected to the earth
conductor.
- The appliance must be permanently connect-
ed to fixed wiring.
- Secure the appliance as described in chapter
"Installation/ Installation".
-Observe the maximum permissible pressure
(see chapter "Installation/ Specification/ Data
table").
- The specific water resistivity of the mains
water supply must not be undershot (see
chapter "Installation/ Specification/ Data
table").
- Drain the appliance as described in chapter
"Installation/ Maintenance/ Draining the
appliance".

OPERATION
General information
ENGLISH
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OPERATION
1. General information
The chapters "Special information" and "Operation" are intended
for both users and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
!KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
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 stated oth-
erwise.
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 excess of 43°C.
CAUTION Burns If children or persons with limited physical, sensory
or mental capabilities use the appliance, a permanent
and unchangeable temperature limit is necessary. Ask
a qualified contractor to set the internal anti-scalding
protection.
!
!

OPERATION
Appliance description
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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 tempera-
ture or a set temperature limit.
-The dynamic anti-scalding protection between the
appliance and a wireless remote control may not be
effective.
f In such cases, limit the temperature with an up-
stream central thermostatic valve (e.g. ZTA3/4).
!WARNING Injury
The appliance may be used by children aged3 and older
and persons with reduced physical, sensory or mental
capabilities or a lack of experience and know-how, pro-
vided that they are supervised or they have been in-
structed on how to use the appliance safely and have
understood the potential risks. Children must never play
with the appliance. Children must never clean the ap-
pliance or perform user maintenance unless they are
supervised.
!Material losses
The user should protect the appliance and its tap against
frost.
2.3 Test symbols
See type plate on the appliance.
2.4 EU Declaration of Conformity
Note DHB-E LCD: STIEBELELTRON hereby declares that the
radio equipment type complies with Directive 2014/53/
EU. The full text of the EU Declaration of Conformity can
be found at the following internet address:
www.stiebel-eltron.de/downloads
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 electronically controlled instantaneous water heater with au-
tomatic output matching maintains a consistent outlet tempera-
ture. It is irrespective of the inlet temperature, up to the maximum
output of the appliance.
If the appliance is operated with preheated water and the inlet
temperature exceeds the set temperature, the water is not heated
further.
Heating system
The bare wire heating system is enclosed within a pressure-tested
plastic jacket. The heating system with its stainless steel internal
indirect coil is suitable for hard and soft water areas and is largely
insusceptible 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 for one minute, thereby protecting the heat-
ing system.
4. Settings and displays
4.1 Selecting the set temperature
D0000076841
2
1
3
1 Temperature selector for adjusting set temperature (no end-
stop): OFF, 20 - 60°C
2 Display
3 Temperature unit [°C/°F]
Temperature settings in steps
Temperature range Step Temperature range Step
20°C ... 60°C 1°C 68°F ... 140°F 1°F
Selecting the temperature indicator
You can choose to display the temperature in °C or °F, as required.
f Turn the temperature selector anti-clockwise, past the OFF
indicator and another five complete turns, until you find
yourself in temperature unit selection mode. Then select the
temperature unit using the temperature selector. After 30s,
the appliance exits selection mode automatically and the se-
lected temperature unit is retained.
Note If the outlet temperature is not high enough when the
draw-off valve is fully open and the temperature selector
is set to maximum, then more water is flowing through
the appliance than can be heated by the heating system
(appliance working at maximum output).
f Reduce the water volume until the preferred tem-
perature delivery is achieved.

OPERATION
Cleaning, care and maintenance
ENGLISH
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4.2 Recommended settings
Your instantaneous water heater offers maximum precision and
maximum convenience in DHW provision. Should you nonetheless
be operating the appliance with a thermostatic valve, we recom-
mend 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
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.
Limiting it in this way prevents water from flowing out of the
appliance at temperatures which could cause injury.
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.
Following an interruption to the water supply
!Material losses
To ensure that the bare wire heating system is not dam-
aged following an interruption to the water supply, the
appliance must be restarted taking the following steps.
f Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
f Switch the power back ON.
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.
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 soiled.
Clean and/or descale the
aerator or shower head.
The water supply has
been interrupted.
Vent the appliance and
the cold water inlet line.
When hot water is being
drawn off, cold water
flows for a short period.
The air detector detects
air in the water. It switch-
es off the heating output
briefly.
The appliance restarts
automatically after
1minute.
The required tempera-
ture cannot be set.
Internal anti-scalding
protection is activated.
The internal anti-scalding
protection can only be
adjusted by the qualified
contractor.
Note Programming unit displays and selected settings are re-
tained following a power failure.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your request, provide the number from
the type plate (000000-0000-000000).
Nr.000000-0000-00000
Nr. 000000-0000-00000
D0000053312

INSTALLATION
Safety
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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
thermostatic valve (see chapter "Appliance description/
Accessories").
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 tempera-
ture or a set temperature limit.
-The dynamic anti-scalding protection between the
appliance and a wireless remote control may not be
effective.
f In such cases, limit the temperature with an up-
stream central thermostatic valve (e.g. ZTA3/4).
7.3 Instructions, standards and regulations
Note Observe all applicable national and regional regulations
and instructions.
- The IP24/ IP25 protection rating can only be ensured with a
correctly fitted cable grommet.
- The specific electrical resistance of the water must not fall
below that stated on the type plate. In a linked water net-
work, factor in the lowest electrical resistance of the water.
Your water supply utility will advise you of the specific elec-
trical water resistance or conductivity.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
-Wall mounting bracket
- Installation template
-2 twin connectors
- 3-way ball shut-off valve for cold water
- Tee for domestic hot water
-Flat gaskets
-Strainer
- Plastic profile washer
- Plastic connection pieces/ Installation aid
- Cap and back panel guides
- Jumper for internal anti-scalding protection
- Jumper for changing the output (only for appliances with ad-
justable output)
8.2 Accessories
Wireless remote control
- FFB4SetEU
Taps/valves
- MEKD mono lever kitchen pressure tap
- MEBD mono lever bath pressure tap
Plugs G½A
If you use other than the recommended pressure taps on finished
walls, please use the plugs.
Installation set for finished walls
- Solder fitting - copper pipe for soldered connection Ø 12mm
- Press-fit fitting - copper pipe
- Press-fit fitting - plastic pipe (suitable for Viega: Sanfix-Plus
or Sanfix-Fosta)
Universal mounting frame
- Mounting frame with electrical connections
Pipe assembly for undersink appliances
You will need the undersink installation set if you make the water
connections (G⅜A) at the top of the appliance.
Pipe assembly for offset installation
Use this pipe assembly if you intend to offset the appliance by up
to 90mm downwards from the water connection.
Pipe assembly for replacing a gas water heater
You will need this pipe assembly set if the existing installation
has gas water heater connections (cold water connection on the
left-hand side, DHW connection on the right-hand side).

INSTALLATION
Preparation
ENGLISH
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Pipe assembly for DHB water plug-in couplings
Use the water plug-in couplings if the existing installation contains
water plug-in connections from a DHB water heater.
Load shedding relay (LR 1-A)
The load shedding relay for installation in the distribution board
provides priority control for the instantaneous water heater when
other appliances, suchas electric storage heaters, are being op-
erated simultaneously.
Central thermostatic valve (ZTA 3/4)
Use the thermostatic valve for central premixing when, forex-
ample, operating an instantaneous water heater with preheated
water. For use in shower operation, the valve must be set to a
maximum of 55°C.
9. Preparation
9.1 Installation location
!Material losses
Install the appliance in a room free from the risk of frost.
f Always install the appliance vertically and near the draw-off
point. For horizontal installation, see chapter "Alternative in-
stallation methods/ Horizontal installation of the appliance".
The appliance is suitable for undersink and oversink installation.
Undersink installation
D0000056242
1
2
1 Cold water inlet
2 DHW outlet
Oversink installation
D0000057030
12
1 Cold water inlet
2 DHW outlet
Note f Mount the appliance on the wall. The wall must have
sufficient load bearing capacity.
9.2 Minimum clearances
≥50≥50
≥90
≥90
D0000060809
f Maintain the minimum clearances to ensure trouble-free op-
eration of the appliance and facilitate maintenance work.
9.3 Water installation
f Flush the water line thoroughly.
Taps/valves
Use appropriate pressure taps. Open vented taps are not per-
missible.
Note Never use the 3-way ball shut-off valve in the cold water
inlet to reduce the flow rate. The 3-way ball shut-off valve
is intended only to shut off the cold waterinlet.
Permissible water line materials
- Cold water inlet line:
Pipes made from galvanised steel, stainless steel, copper or
plastic
- DHW outlet line:
Pipes made from stainless steel, copper or plastic
!Material losses
If plastic pipework systems are used, take into account
the maximum inlet temperature and the maximum per-
missible pressure.
Flow rate
f Ensure that the flow rate for switching on the appliance is
achieved.
f Increase the water line pressure if the required flow rate
is not achieved when the draw-off valve is fully open. If
the flow rate is still not achieved, remove the flow limiter
(see chapter "Installation/ Installation/ Removing the flow
limiter").

INSTALLATION
Installation
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10. Installation
Factory settings DHB-E11/13LCD DHB-E18 LCD25A DHB-E 18/21/24LCD DHB-E27LCD
Internal anti-scalding protection °C 60 60 60 60
Connected load kW 13.5 18 21 27
Connected load options x - x -
Standard installation DHB-E11/13LCD DHB-E18 LCD25A DHB-E18/21/24LCD DHB-E27LCD
Electrical connection from below on unfinished walls x x x x
Water connection on unfinished walls x x x x
For further installation options, see chapter "Alternative instal-
lation methods".
10.1 Standard installation
Opening the appliance
D0000053271
f Open the appliance by holding the fascia at the side and pull-
ing forwards away from the appliance cover. Undo the screw.
Pivot open the appliance cover.
D0000053272
f Remove the back panel by pressing the two locking tabs and
pulling the lower section of the back panel forwards.
Preparing the power cable on unfinished walls, for connection
from below
160
30
D0000053273
1
1 Cable entry installation aid
f Prepare the power cable.
Fitting the wall mounting bracket
D0000059694
f Mark out the holes for drilling using the installation tem-
plate. If the appliance is to be installed on finished walls, also
mark out the fixing hole in the lower section of the template.
f Drill the holes and secure the wall mounting bracket at 2
points using suitable fixing materials (screws and rawl plugs
are not part of the standard delivery).
f Fit the wall mounting bracket.
Installing the twin connectors
!Material losses
Carry out all water connection and installation work in
accordance with regulations.
12
D0000053319
f Seal and insert the twin connectors.

INSTALLATION
Installation
ENGLISH
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Making the water connection
5 Nm
24
5 Nm
24
D0000085349
4
1
5
2
3
2
1 DHW with tee
2 Gasket
3 Cold water with 3-way ball shut-off valve
4 Strainer
5 Plastic profile washer
f Secure the tee and 3-way ball shut-off valve, each with a flat
gasket, to the twin nipples.
!Material losses
The strainer must be fitted for the appliance to function.
f When replacing an appliance, check whether the
strainer is installed.
Removing the flow limiter
Note If you are using a thermostatic valve, you must not re-
move the flow limiter.
If the flow rate is too low, remove the flow limiter. To do this,
remove the function module from the appliance back panel.
4.
2.
3.
1.
D0000085494
f Release the locking hook.
f Push the function module in the appliance back panel slightly
towards the back.
f Remove the function module from the appliance back panel
by pulling it slightly forwards and lifting it off.
D0000084719
4.
5.
2.
3.
1.
5
1 2 3
4
1 Flow limiter
2 O-ring
3 Cold water pipe bend with recess for locking clip
4 Locking clip
5 Heater
f Remove the cold water pipe bend and the O-ring.
f Remove the flow limiter from the cold water inlet of the heat-
er using a pointed object or suitable pliers.
f Refit the cold water pipe bend and the O-ring.
!Material losses
The O-ring must be fitted to prevent the appliance from
leaking.
f As part of installation, check that the O-ring is in
place.
f Secure the cold water pipe bend with the locking clip.
!Material losses
Ensure that the locking clip is located behind the recess
in the pipe bend and fixes the bend in position.
f Mount the function module in reverse order in the appliance
back panel until the function module clicks into place.

INSTALLATION
Installation
11 | DHB-E LCD www.stiebel-eltron.com
Installing the appliance
Note If you are installing the appliance with flexible pipe con-
nections, also secure the back panel with a screw.
D0000053291
1
2
1 Cable entry installation aid
2 Cable grommet
Use the installation aid for easier wiring access through the cable
grommet (see plastic parts set supplied).
f Remove the cable grommet from the back panel.
f Pull the cable grommet over the cable sheath of the power
cable. For large cable cross-sections, enlarge the hole in the
cable grommet if necessary.
D0000053274
f Remove the transport protection plugs from the appliance
pipe connections.
f Bend the power cable 45° upwards.
f Route the power cable and cable grommet through the back
panel from the rear.
f Install the appliance on the threaded studs of the wall
mounting bracket.
f Press the back panel firmly into place, aligning it correctly.
f Lock the fixing toggle by turning it 90° clockwise.
f Pull the cable grommets into the back panel, until both lock-
ing tabs engage.
24
19
3 Nm
5 Nm
D0000056244
f Fit the pipe connections with flat gaskets onto the water
connections.
f Open the 3-way ball shut-off valve or the shut-off valve in the
cold water supply 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 must be in the form
of a permanent connection in conjunction with the re-
movable cable grommet. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3mm contact separation.
WARNING Electrocution Ensure that the appliance is earthed.
!Material losses
Observe the type plate. The specified rated voltage must
match the mains voltage.
f Connect the power cable to the mains terminal.
Fitting the lower back panel section
D0000053275
1
1 Diffuser on lower back panel
f Fit the lower back panel section into the back panel. Check
that both locking tabs are engaged.
f Align the mounted appliance by undoing the fixing toggle,
aligning the power supply and back panel, and then re-tight-
ening the fixing toggle. If the back panel does not sit flush
against the wall, you can secure the appliance at the bottom
with an additional screw.
!Material losses
Do not bend the diffuser on the lower back panel when
installing.

INSTALLATION
Commissioning
ENGLISH
www.stiebel-eltron.com DHB-E LCD| 12
11. Commissioning
11.1 Preparation
Internal anti-scalding protection via jumper slot
43
50
55
60
D0000085932
Jumper position Description
43 Forexample, nurseries, hospitals etc.
50
55 Max. for shower operation
60 Factory setting
No jumper Limited to 43°C
f Install the anti-scalding protection setting jumper in the re-
quired position (= temperature in °C) on the pin strip.
CAUTION Burns If operating with preheated water, e.g. if using a solar
thermal system, the internal anti-scalding protection can
be overridden.
f In this case, limit the temperature with an upstream
central thermostatic valve (e.g. ZTA3/4).
Changing the connected load via the jumper slot; only for
appliances with adjustable output
If you select a connected load other than the factory setting for
appliances with selectable connected load, you will need to repo-
sition the jumper.
1
2
3
D0000085933
f Install the jumper in the required position on the pin strip.
Jumper position Connected load
DHB-E 11/13 LCD
Connected load
DHB-E 18/21/24 LCD
1 11kW 18kW
2 13,5kW 21kW
3 11kW 24kW
No jumper 11kW 18kW
11.2 Initial start-up
≥ 60 s
D0000053277
f Open and close all connected draw-off valves several times,
until all air has been purged from the pipework and the
appliance.
f Carry out a tightness check.
D0000053278
f Activate the safety switch by firmly pressing the reset button
(the appliance is delivered with the safety switch disabled).
D0000073198
f Connect the programming unit connecting cable to the PCB.
Note For undersink installation, the appliance cover should
be turned round for easier operation; see chapter "Alter-
native installation methods/ Pivoting appliance cover".
D0000053280
f Hook the appliance cover at the top rear into the back panel.
Pivot the appliance cover downwards. Check that the appli-
ance cover is securely seated at both top and bottom.
f Tick the selected connected load and rated voltage on the ap-
pliance cover type plate (on both sides). Use a ballpoint pen
to do this.
f Secure the appliance cover with the screw.
f Fit the fascia to the appliance cover.
f Remove the protective film from the user interface.
D0000053281
f Switch on the power supply.

INSTALLATION
Appliance shutdown
13| DHB-E LCD www.stiebel-eltron.com
11.2.1 Appliance handover
f Explain the appliance function to users and familiarise them
with its operation.
f Make the user aware of potential dangers, especially the risk
of scalding.
f Hand over the instructions.
11.3 Recommissioning
!Material losses
To ensure that the bare wire heating system is not dam-
aged following an interruption to the water supply, the
appliance must be restarted taking the following steps.
f Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f Open the tap for a minimum of one minute until the
appliance and its upstream cold water inlet line are
free of air.
f Switch the power back ON.
12. Appliance shutdown
f Isolate all poles of the appliance from the power supply.
f Drain the appliance (see chapter "Installation/ Maintenance/
Draining the appliance").
13. Alternative installation methods
Overview of the alternative types of installation
Electrical connection IP rating
On unfinished walls, connected from above IP25
Unfinished walls, from below, short power cable IP25
Installation on finished walls IP 24
Water connection IP rating
Installation on finished walls IP 24
Other IP rating
Installation with offset tiles IP25
Pivoting appliance cover IP25
Horizontal installation of the appliance IP 24
WARNING Electrocution Before any work on the appliance, disconnect all poles
from the power supply.
13.1 Electrical connection from above on unfinished
walls
140
30
D0000076507
1
1 Cable entry installation aid
f Prepare the power cable.
D0000053282
1
1 Cable routing
f Reposition the mains terminal from the bottom to the top. To
do this, undo the fixing screw. Turn the mains terminal with
connecting cables 180° clockwise. Route the cable around
the cable guide when doing so. Secure the mains terminal in
place.
f Replace the cable grommets.
f Install the cable grommet downwards from above.
f Pull the cable grommet over the cable sheath of the power
cable.
f Install the appliance on the threaded studs of the wall
mounting bracket.
f Push the back panel firmly against the wall. Lock the fixing
toggle by turning it 90° clockwise.
f Pull the cable grommets into the back panel, until both lock-
ing tabs engage.
f Connect the power cable to the mains terminal.
WARNING Electrocution The connecting wires must not protrude beyond the level
of the mains terminal.
13.2 Electrical connection on unfinished walls with
short power cable
D0000060387
f Reposition the mains terminal further downwards. To do this,
undo the fixing screw. Secure the mains terminal in place.

INSTALLATION
Alternative installation methods
ENGLISH
www.stiebel-eltron.com DHB-E LCD| 14
13.3 Electrical connection on finished walls
Note This type of connection changes the IP rating of the ap-
pliance.
f Change the type plate. Cross out "IP25" and mark
the box "IP24". Use a ballpoint pen to do this.
A
30
D0000076506
1
1 Cable grommet
Electrical connection on finished walls Dimension A
Positioned in lower section of appliance 160
Positioned in upper section of appliance 110
f Prepare the power cable. Fit the cable grommet.
!Material losses
If you break out the wrong knock-out in the back panel/
appliance cover by mistake, you must use a new back
panel/appliance cover.
f Cleanly cut and break out the required cable entries from the
back panel and appliance cover (for the positions, see chap-
ter "Specification/ Dimensions and connections"). Deburr any
sharp edges with a file.
f Route the power cable through the cable grommet.
f Connect the power cable to the mains terminal.
13.4 Connecting a load shedding relay
Install a load shedding relay in the distribution board in conjunc-
tion with other electric appliances, e.g.electric storage heaters.
The relay responds when the instantaneous water heater starts.
!Material losses
Connect the phase that switches the load shedding relay
to the indicated terminal of the mains terminal in the
appliance (see chapter "Specification/ Wiring diagram").
13.5 Water installation on finished walls
Note This type of connection changes the IP rating of the ap-
pliance.
f Change the type plate. Cross out "IP25" and mark
the box "IP24". Use a ballpoint pen to do this.
19
5 Nm
19
5 Nm
24
18 Nm 24
18 Nm
D0000033104
f Fit water plugs with gaskets to seal the concealed connec-
tions. All taps obtained as accessories are supplied with
plugs and gaskets as standard. For pressure taps other than
those recommended by us, plugs and gaskets can be ordered
as accessories.
f Fit a suitable pressure tap.
f Push the lower back panel section under the connecting
pipes of the tap and push it into the back panel.
f Secure the connection pipes to the tee and the 3-way ball
shut-off valve.
Note You can break off the pipe fitting tabs on the lower back
panel section if required.
D0000056194
1
1 Tab
13.6 Water installation on finished walls with
solder/press-fit fittings
Note This type of connection changes the IP rating of the ap-
pliance.
f Change the type plate. Cross out "IP25" and mark
the box "IP24". Use a ballpoint pen to do this.
You can connect copper or plastic pipes using the accessories
"solder fitting" or "press-fit fitting".
With "solder fitting" with threaded fitting for 12mm copper pipes,
proceed as follows:
f Push the union nuts over the connection pipes.
f Solder the inserts to the copper pipes.
f Push the lower back panel section under the connecting
pipes of the tap and push it into the back panel.
f Secure the connection pipes to the tee and the 3-way ball
shut-off valve.
Note Observe the tap manufacturer's instructions.

INSTALLATION
Alternative installation methods
15 | DHB-E LCD www.stiebel-eltron.com
13.7 Fitting appliance cover over water installation
on finished walls
D0000073170
4
3
2
1
1 Back panel guides
2 Screw
3 Cover guides with sealing lips on the pipe side
4 Pipe knock-out
f Cleanly saw and break out the pipe knock-outs in the appli-
ance cover. If necessary, use a file.
f Click the cover guides into place in the knock-outs.
Only if using the "solder fitting" accessory and with precise
adherence to all installation dimensions:
f Break the sealing lips out of the cover guides.
f Position the back panel guides on the pipes. Push them to-
gether. Then push the guide pieces against the back panel as
far they will go.
f Secure the lower back panel section with a screw.
Note You can use the cover guides with sealing lips to com-
pensate for a slight offset of the connection pipes and/
or if using the "press fitting" accessory. In this case, the
back panel guides are not fitted.
13.8 Lower back panel section installation with
threaded fittings on finished walls
D0000053286
2
3
1
1 Lower back panel section
2 Connection piece in the standard delivery
3 Screw
If using threaded fittings on finished walls, the lower back panel
section can also be installed after fitting the taps/valves. To do
this, carry out the following steps:
f Cut open the lower section of the back panel.
f Fit the lower section of the back panel by bending it out at
the sides and guiding it over the pipes.
f Insert the connection pieces into the lower section of the
back panel from behind.
f Click the lower section of the back panel into place.
f Secure the lower back panel section with a screw.
13.9 Wall mounting bracket when replacing
appliance
An existing STIEBELELTRON wall mounting bracket may be used
when replacing appliances (except for DHF instantaneous water
heater), as long as the fixing screw is in the lower right position.
Replacing a DHF instantaneous water heater
26�02�02�0815�
f Reposition the fixing screw on the wall mounting bracket (the
securing screw has a self-tapping thread).
f Rotate the wall mounting bracket 180° and mount it on the
wall (the DHF logo is then turned towards the reader).
13.10 Installation with offset tiles
110
20
26�02�02�1066�
2
1
1 Minimum contact area of the appliance
2 Maximum tile offset
f Adjust the wall clearance. Lock the back panel in place using
the fixing toggle (turn 90° clockwise).
13.11 Pivoting appliance cover
The appliance cover should be turned round for undersink in-
stallation.
D0000076838
f Remove the programming unit from the appliance cover by
pressing the locking hooks and removing the programming
unit.

INSTALLATION
Service information
ENGLISH
www.stiebel-eltron.com DHB-E LCD| 16
f Turn the appliance cover (not the appliance) and refit the
programming unit. Push the programming unit home in par-
allel until all locking tabs engage. When engaging the locking
tabs, apply counter pressure by pushing against the appli-
ance cover from the inside.
WARNING Electrocution All 4locking tabs on the programming unit must click into
place. The locking tabs must be complete and undam-
aged. If the programming unit is not inserted correctly,
protection of users against contact with live components
cannot be ensured.
f Insert the connecting cable plug of the programming unit
into the PCB (see chapter "Commissioning/ Initial start-up").
f Hook the appliance cover in at the bottom. Pivot the appli-
ance cover up to the back panel.
f Secure the appliance cover.
f Fit the cover on to the appliance cover.
13.12 Operation with preheated water
You can restrict the maximum inlet temperature by installing a
central thermostatic valve.
13.13 Horizontal installation of the appliance
Note For the horizontal installation alternative, please note
the following points:
- Installation is only permissible with direct wall
mounting. The universal mounting frame cannot be
used.
- The installation versions "Installation with offset
tiles" and "Rotated appliance cover" are not permis-
sible.
- This type of connection changes the IP rating of the
appliance. Cross out "IP25" on the type plate and
mark the box "IP24". Use a ballpoint pen to do this.
Horizontal installation
The appliance can also be mounted horizontally on the wall
(turned 90° to the left, with the water connections on the right).
The installation, water and electrical connections are described
in chapters "Standard installation" and "Alternative installation
methods".
1
2
D0000076919
1 Cold water inlet
2 DHW outlet
Preparation
The appliance cover must be provided with a condensate drain
opening of min. ∅ 5.0mm to max. ∅ 6.0mm at the marked po-
sition.
50
Ø 5,0
D0000076914
1 2
1 Appliance cover with opening for condensate drain
2 Back panel with additional fixing screw
f Drill a hole from the outside through the dismantled appli-
ance cover at the marked point. Alternatively, you can punch
a hole in the appliance cover from the inside at the marked
point. In this case, you must then enlarge the hole to the
required diameter from the outside. Deburr any sharp edges
with a file.
f Secure the appliance back panel with an additional screw.
!Material losses
An appliance cover with an existing condensate drain
opening must no longer be used for vertical installation
of the appliance.
14. Service information
Overview of connections
D0000076842
1
2
3
4
5
6
1 Flow sensor
2 High limit safety cut-out, automatic reset
3 NTC sensor
4 Pin strips for connected load and anti-scalding protection
5 Programming unit plug-in position
6 Diagnostic traffic light
Appliance cover retainer
D0000056216

INSTALLATION
Troubleshooting
17 | DHB-E LCD 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.
Indicator options for diagnostic traffic light (LED)
Red Illuminates in the event of a fault
Yellow Illuminates in heating mode/flashes when output restric-
tion 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 mains power phases missing Check fuses/MCBs in distribution board
Faulty PCB Replacing 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 attached Check plug-in connection; correct if necessary
Flow meter faulty or dirty Replacing the flow meter
Faulty PCB Replacing the function module
Green flashing, yellow on,
red off
No display Loose connecting cable between PCB and pro-
gramming unit
Check plug-in connections; correct if necessary
Faulty connecting cable between PCB and pro-
gramming unit
Check connecting cable; replace if necessary
Programming unit faulty Replacing the programming unit
Faulty PCB Replacing the function module
Green flashing, yellow on,
red off
No DHW; outlet temperature
does not match set value
Tap faulty Replace tap
Faulty outlet sensor Replace the outlet sensor
Heating system faulty Replacing the function module
Faulty PCB Replacing the function module
Green flashing, yellow flash-
ing, red off
No DHW; outlet temperature
does not match set value
Appliance is operating at its output limit Reduce flow rate; install flow limiter
Appliance is operating at its output limit Check jumper position for connected load
Heating system faulty Replacing the function module
Green flashing, yellow off,
red on
No DHW; outlet temperature
does not match set value
One or more mains power phases missing Check fuses/MCBs in distribution board
Air detection has responded Continue draw-off for >1 min
Safety switch not activated during "Commissioning" Activate safety switch by pressing the reset button
firmly
Safety switch 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; activate safety
switch and draw off water at the maximum set
value for >1 min
Safety switch responds again; PCB faulty Replacing the function module
Short circuit in outlet sensor Check outlet sensor; replace if necessary
Faulty PCB Replacing the function module

INSTALLATION
Maintenance
ENGLISH
www.stiebel-eltron.com DHB-E LCD| 18
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.
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 3-way ball shut-off valve or the shut-off valve in the
cold water supply line.
f Open all draw-off valves.
f Undo the pipe connections from the appliance.
f Store the dismantled appliance in a room free from the risk
of frost, as water residues remaining inside the appliance can
freeze and cause damage.
Cleaning the strainer
If dirty, clean the strainer in the threaded cold water fitting. Close
the 3-way ball shut-off valve or the shut-off valve in the cold water
supply line before removing, cleaning and refitting the strainer.
17. Specification
17.1 Dimensions and connections
466
225
35
35
414
38
105≤ 20
140
30
b02
100
c01c06
368
116
D0000073253
DHB-E LCD
b02 Entry electrical cables I Installation on unfinished walls
c01 Cold water inlet Male thread G 1/2 A
c06 DHW outlet Male thread G 1/2 A
Alternative connection options
165
b04 b04
69
330
b04
69
325
b04
b04
b03
20
35
30
b02
D0000053293
DHB-E LCD
b02 Entry electrical cables I Installation on unfinished walls
b03 Entry electrical cables II Installation on unfinished walls
b04 Entry electrical cables III Installation on finished walls
17.2 Wiring diagram
3/PE ~ 380-415 V
D0000053424
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
Priority control with LR 1-A
85�02�02�0003�
2
1
1 Control cable to the contactor of the second appliance (elec-
tric storage heater, forexample)
2 Control contact drops out when switching the instantaneous
water heater on.

INSTALLATION
Specication
19 | DHB-E LCD www.stiebel-eltron.com
17.3 Domestic hot water 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 38°C DHW output in l/min
Rated voltage Cold water inlet temperature
380V 400V 415V 5°C 10°C 15°C 20°C
DHB-E 11/13 LCD
9.9 4.3 5.1 6.1 7.9
12.2 5.3 6.2 7.6 9.7
11 4.8 5.6 6.8 8.7
13.5 5.8 6.9 8.4 10.7
11.8 5.1 6.0 7.3 9.4
14.5 6.3 7.4 9.0 11.5
DHB-E 18 LCD 25A
16.2 7.0 8.3 10.1 12.9
18 7.8 9.2 11.2 14.3
19.4 8.4 9.9 12.0 15.4
DHB-E 18/21/24 LCD
16.2 7.0 8.3 10.1 12.9
19 8.2 9.7 11.8 15.1
21.7 9.4 11.1 13.5 17.2
18 7.8 9.2 11.2 14.3
21 9.1 10.7 13.0 16.7
24 10.4 12.2 14.9 19.0
19.4 8.4 9.9 12.0 15.4
22.6 9.8 11.5 14.0 17.9
25.8 11.2 13.2 16.0 20.5
DHB-E 27 LCD
24,4 10,6 12,4 15,2 19,4
27 11,7 13,8 16,8 21,4
Connected load in kW 50°C DHW output in l/min
Rated voltage Cold water inlet temperature
380V 400V 415V 5°C 10°C 15°C 20°C
DHB-E 11/13 LCD
9.9 3.1 3.5 4.0 4.7
12.2 3.9 4.4 5.0 5.8
11 3.5 3.9 4.5 5.2
13.5 4.3 4.8 5.5 6.4
11.8 3.7 4.2 4.8 5.6
14.5 4.6 5.2 5.9 6.9
DHB-E 18 LCD 25A
16.2 5.1 5.8 6.6 7.7
18 5.7 6.4 7.3 8.6
19.4 6.2 6.9 7.9 9.2
DHB-E 18/21/24 LCD
16.2 5.1 5.8 6.6 7.7
19 6.0 6.8 7.8 9.0
21.7 6.9 7.8 8.9 10.3
18 5.7 6.4 7.3 8.6
21 6.7 7.5 8.6 10.0
24 7.6 8.6 9.8 11.4
19.4 6.2 6.9 7.9 9.2
22.6 7.2 8.1 9.2 10.8
25.8 8.2 9.2 10.5 12.3
DHB-E 27 LCD
24,4 7,7 8,7 10,0 11,6
27 8,6 9,6 11,0 12,9
17.4 Application areas/ Conversion table
Specific electrical resistance and specific electrical conductivity
Standard specifica-
tion at 15°C 20°C 25°C
Resist-
ance
ρ≥
Conductivity σ ≤ Resist-
ance
ρ≥
Conductivity σ ≤ Resist-
ance
ρ≥
Conductivity σ ≤
Ωcm mS/m μS/cm Ωcm mS/m μS/cm Ωcm mS/m μS/cm
900 111 1111 800 125 1250 735 136 1361
17.5 Pressure drop
Taps/valves
Tap pressure drop at a flow rate of 10 l/min
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.

INSTALLATION
Specication
ENGLISH
www.stiebel-eltron.com DHB-E LCD| 20
17.7 Energy consumption data
Product datasheet: Conventional water heaters to regulation (EU) no. 812/2013 | 814/2013
DHB-E 11/13 LCD DHB-E 18 LCD 25A DHB-E 18/21/24 LCD DHB-E 27 LCD
236743 236744 236745 236746
Manufacturer STIEBEL ELTRON STIEBEL ELTRON STIEBEL ELTRON STIEBEL ELTRON
Load profile S S S S
Energy efficiency class A A A A
Energy conversion efficiency %39 39 39 39
Annual power consumption kWh 479 476 476 475
Default temperature setting °C 60 60 60 60
Sound power level dB(A) 15 15 15 15
Special information on measuring efficiency Measured with integral
flow limiter, maximum
output and maximum set
value
Measured with integral
flow limiter and maximum
set value
Measured with integral
flow limiter with highest
flow rate, maximum
output and maximum set
value
Measured with integral
flow limiter and maximum
set value
Daily power consumption kWh 2.201 2.184 2.184 2.177
17.8 Data table
DHB-E 11/13 LCD DHB-E 18 LCD 25A DHB-E 18/21/24 LCD DHB-E 27 LCD
236743 236744 236745 236746
Electrical details
Rated voltage V380 400 415 380 400 415 380 400 415 380 400
Rated output kW 9.9/12.2 11/13.5 11.8/14.5 16.2 18 19.4 16.2/19/21.7 18/21/24 19.4/22.6/25.8 24.4 27
Rated current A16.6/18.5 17.5/19.5 18.2/20.2 24.7 26 27 27.6/29.5/33.3 29/31/35 30.1/32.2/36.3 37.1 39
Fuses A20 25 25 32 32/32/35 32/32/35 32/32/40 40 40
Frequency Hz 50/60 50/60 50/- 50/60 50/60 50/- 50/60 50/60 50/- 50/- 50/-
Phases 3/PE 3/PE 3/PE 3/PE
Specific resistance ρ15 ≥ Ω cm 900 900 900 900
Specific conductivity 15 ≤ μS/cm 1111 1111 1111 1111
Max. mains impedance at 50Hz Ω 0.459 0.436 0.42 0.331 0.315 0.304 0.248 0.236 0.227 0.221 0.21
Versions
Heating system heat generator Bare wire Bare wire Bare wire Bare wire
Insulation block Plastic Plastic Plastic Plastic
Connected load options X - X -
Temperature adjustment °C Off. 20-60 Off. 20-60 Off. 20-60 Off. 20-60
Protection class 1 1 1 1
Cap and back panel Plastic Plastic Plastic Plastic
IP-Rating IP25 IP25 IP25 IP25
Colour white white white white
Connections
Water connection G 1/2 A G 1/2 A G 1/2 A G 1/2 A
Application limits
Max. permissible pressure MPa 1 1 1 1
Max. inlet temperature for reheating °C 55 55 55 55
Values
Max. inlet temperature (e.g. pasteurisation) °C 70 70 70 70
ON l/min >2.5 >2.5 >2.5 >2.5
Flow rate limit at l/min 4.0 8.0 8.0 9.0
Flow rate at 28K l/min 5.6/6.9 at 400V 9.2 at 400V 9.2/10.7/12.3 at 400V 13.8 at 400V
Flow rate at 50K l/min 3.2/3.9 at 400V 5.2 at 400V 5.2/6.0/6.9 at 400V 7.7
Pressure drop for flow rate at 50K
(without flow limiter)
MPa 0.03/0.04 0.06 0.06/0.08/0.1 0.13
Pressure drop for flow rate at 50K
(with flow limiter)
MPa 0.08/0.2 0.1 0.1/0.13/0.17 0.2
Hydraulic data
Rated capacity l0.4 0.4 0.4 0.4
Dimensions
Height mm 466 466 466 466
Width mm 225 225 225 225
Depth mm 116 116 116 116
Weights
Weight kg 2.8 2.9 2.9 2.9