STIEBEL ELTRON HDB-E 12 Si Instruction Manual

BEDIENUNG UND INSTALLATION
OPERATION AND INSTALLATION
UTILISATION ET INSTALLATION
BEDIENING EN INSTALLATIE
OBSLUHA A INSTALACE
Elektronisch gesteuerter Durchlauferhitzer | Electronically controlled
instantaneous water heater | Chauffe-eau instantané à gestion électronique |
Elektronisch gestuurde doorstroomer | Elektronicky řízený průtokový ohřívač
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CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
OPERATION
1. General information ��������������������������������������� 19
1.1 Safety instructions���������������������������������������������� 19
1.2 Other symbols in this documentation ���������������������� 19
1.3 Units of measurement ����������������������������������������� 19
2. Safety�������������������������������������������������������� 19
2.1 Intended use����������������������������������������������������� 19
2.2 General safety instructions ����������������������������������� 19
2.3 Test symbols �����������������������������������������������������20
3. Appliance description ������������������������������������� 20
4. Operation ��������������������������������������������������� 20
5. Cleaning. care and maintenance ������������������������� 20
6. Troubleshooting �������������������������������������������� 20
INSTALLATION
7. Safety�������������������������������������������������������� 21
7.1 General safety instructions ����������������������������������� 21
7.2 Regulations. standards and instructions������������������� 21
8. Appliance description ������������������������������������� 21
8.1 Standard delivery����������������������������������������������� 21
8.2 Accessories������������������������������������������������������� 21
9. Preparations������������������������������������������������ 21
9.1 Installation site�������������������������������������������������� 22
9.2 Factory settings ������������������������������������������������� 22
10. Installation�������������������������������������������������� 22
10.1 Completing the installation����������������������������������� 25
10.2 Alternative installation methods����������������������������� 25
11. Commissioning ��������������������������������������������� 27
11.1 Commissioning�������������������������������������������������� 27
11.2 Recommissioning����������������������������������������������� 27
12. Shutting down���������������������������������������������� 27
13. Troubleshooting �������������������������������������������� 28
13.1 Display options for LED diagnostic traffic light ����������� 28
13.2 Fault table�������������������������������������������������������� 28
14. Maintenance ������������������������������������������������ 29
15. Specification ������������������������������������������������ 29
15.1 Dimensions and connections��������������������������������� 29
15.2 Wiring diagram ������������������������������������������������� 29
15.3 DHW output������������������������������������������������������ 30
15.4 Application areas/ conversion table ����������������������� 30
15.5 Pressure drop ��������������������������������������������������� 30
15.6 Fault conditions �������������������������������������������������30
15.7 Details on energy consumption������������������������������ 31
15.8 Data table �������������������������������������������������������� 31
GUARANTEE | ENVIRONMENT AND RECYCLING
SPECIAL INFORMATION
- The appliance may be used by children aged 8
and up and persons with reduced physical, sen-
sory or mental capabilities or a lack of experience
and know-how, provided that they are supervised
or they have been instructed on how to use the
appliance safely and have understood the result-
ing risks. Children must never play with the ap-
pliance. Children must never clean the appliance
or perform user maintenance unless they are
supervised.
- Risk of scalding: The tap can reach temperatures
in excess of 60°C.
- Ensure the appliance can be separated from the
power supply by an isolator that disconnects all
poles with at least 3mm contact separation.
- Secure the appliance as described in chapter “In-
stallation/ Installation”.
- Observe the maximum permissible pressure (see
chapter “Installation/Specification/ Data table”).
- Drain the appliance as described in chap-
ter “Installation/ Maintenance/ Draining the
appliance”.

OPERATION
General information
ENGLISH
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OPERATION
1. General information
The chapter “Operation” is intended for appliance users and heat-
ing contractors.
The chapter “Installation” is intended for heating contractors.
Note Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
!KEYWORD Type of risk
Here. possible consequences are listed that may result
from failure to observe the safety instructions.
 Steps to prevent the risk are listed.
1.1.2 Symbols. type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns. scalding)
1.1.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-
serious or minor injury.
1.2 Other symbols in this documentation
Note General information is identified by the symbol shown
on the left.
 Read these texts carefully.
Symbol Meaning
Material damage
(appliance. consequential and environmental pollution)
Appliance disposal
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.3 Units of measurement
Note All measurements are given in mm unless stated oth-
erwise.
2. Safety
2.1 Intended use
This appliance is designed for domestic use. It can be used safely
by untrained persons. The appliance can also be used in a non-
domestic environment, e.g. in a small business, as long as it is
used in the same way.
This pressure appliance is designed to heat DHW. The appliance
can supply one or more draw-off points.
Any other use beyond that described shall be deemed inappropri-
ate. Observation of these instructions and of 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 of
around 55°C.
There is a risk of scalding at outlet temperatures in ex-
cess of 43 °C.
!WARNING Injury
The appliance may be used by children aged 8 and up
and persons with reduced physical, sensory or mental
capabilities or a lack of experience provided that they
are supervised or they have been instructed on how to
use the appliance safely and have understood the result-
ing risks. Children must never play with the appliance.
Children must never clean the appliance or perform user
maintenance unless they are supervised.
!Material damage
Protect the appliance and its tap against frost.
!
!

OPERATION
Appliance description
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2.3 Test symbols
See type plate on the appliance.
Country-specific approvals and certifications: Germany
A general test certificate [Germany] as verification of suitability
regarding noise emissions has been issued for this appliance.
based on the State Building Regulations [Germany].
DIN 4109
PA-IX 6816/I
3. Appliance description
The appliance heats potable water that flows through it. When
a DHW valve is opened. the heater starts automatically as soon
as the start-up volume has been reached. The heating output
is determined and matched by the flow rate and the cold water
temperature.
Heating system
The heating system is suitable for hard and soft water areas; it
is not susceptible to scale build-up. The heating system ensures
quick and efficient DHW availability.
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 heater shuts
down automatically for one minute. thereby protecting
the heating system.
Thermostatic valve
The appliance is suited to operation with a thermostatic valve.
4. Operation
The heating system of the appliance starts automatically and heats
the water as soon as you open the DHW valve at the tap.
Setting the DHW temperature
Should the outlet temperature fail to reach the required level with
the draw-off valve fully open. then more water flows through the
appliance than can be heated by the heating system.
 Reduce the flow rate with the draw-off valve.
Outlet capacities
Subject to season. different maximum mixed water or outlet ca-
pacities can result from varying cold water temperatures (see
chapter “Specification”).
Following an interruption of the water supply
See chapter “Restarting”
5. Cleaning. care and maintenance
 Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
 Check the taps/valves regularly. You can remove limescale
deposits at the tap outlets using commercially available des-
caling agents.
6. Troubleshooting
Fault Cause Remedy
The appliance will not
start in spite of a fully
open DHW valve.
There is no power. Check the fuse/MCB in
your fuse box/distribu-
tion panel.
Starting volume is not
achieved. The jet control-
ler in the tap or shower
head is scaled up or con-
taminated.
Clean and/or descale the
jet controller or shower
head.
The water supply has
been interrupted.
Vent the appliance and
the cold water inlet line
(see chapter “Commis-
sioning/ Restarting”).
Cold water flows briefly
while hot water is being
drawn.
The air sensor detects air
in the water and briefly
switches the heater off.
The appliance restarts
automatically after
1minute.
If you cannot remedy the fault. notify your heating contractor. To
facilitate and speed up your enquiry. please provide the serial
number from the type plate (000000-0000-000000):
HDB-E .. Nr.: 000000-0000-000000
26�02�02�1366

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INSTALLATION
Safety
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 operation and operational reliability
only if the original accessories and spare parts intended for the
appliance are used.
!Material damage
Observe the maximum inlet temperature. The appliance
can be damaged by higher temperatures.
7.2 Regulations. standards and instructions
Note Observe all applicable national and local instructions and
regulations. e.g. DIN1988/ DINEN806 in Germany.
- The protection rating IP 25 (hoseproof) 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. observe the lowest electrical water resistance (see
chapter “Specification / Application areas”). Your water
supply utility will advise you of the specific electrical water
resistance or conductivity.
8. Appliance description
8.1 Standard delivery
- Mounting bracket
- Installation template
- Twin nipple
- Cross-piece
- DHW tee
- Flat gaskets
- Sieve
- Flow limiter
- Plastic profile washer
- Plastic cap
- Flexible plastic couplings
- Cap and back panel guides
8.2 Accessories
Taps
- MEKD - Pressure-tested kitchen tap
- MEBD - Pressure-tested bath tap
Plug G½A
These plugs are required if you use pressure-tested taps for fin-
ished walls other than the ones recommended by us.
Installation sets for installation on finished walls
- Solder fitting - copper pipe for solder connection Ø 12mm.
- Compression fitting - copper pipe.
- Compression fitting - plastic pipe (suitable for Viega: Sanfix-
Plus or Sanfix-Fosta).
Universal mounting frame
Mounting frame with electrical connections.
Pipe assembly DHB water plug-in couplings
2 water plug-in couplings allow the appliance to be connected to
the available water plug-in connections of a DHB.
Load shedding relay (LR 1-A)
The load shedding relay which needs to be installed in the dis-
tribution board provides priority control for the instantaneous
water heater when operating. for example. electric storage heat-
ers simultaneously.
9. Preparations
 Flush the water line thoroughly.
Taps/valves
 Use appropriate pressure-tested Taps (see “Appliance
description / Accessories” chapter). Open taps are not
permitted.
A safety valve is not required.
!Material damage
If plastic pipework systems are used. take into account
the maximum inlet temperature and the maximum pres-
sure (see chapter “Specification / Data table”).
Permissible water pipe materials
- Cold water inlet pipe:
Galvanised steel pipe. stainless steel pipe. copper pipe or
plastic pipe
- DHW outlet pipe:
Stainless steel pipe. copper pipe or plastic pipe
!Material damage
If plastic pipework systems are used. take into account
the maximum inlet temperature and the maximum pres-
sure (see chapter “Specification / Data table”).
Flow rate
 Ensure that the flow rate (see chapter “Specification / Data
table”. On) for switching on the appliance is achieved.
 Increase the mains water pressure if the required flow rate is
not achieved with the draw-off valve fully opened.

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INSTALLATION
Installation
Flow pressure
If the minimum flow rate required for the appliance to switch on is
not achieved even with the tap fully open. remove the flow limiter.
Replace it with the plastic profile washer supplied. If required the
pressure in the water installation can also be raised.
26�02�02�0820
2 1
1 Flow limiter
2 Plastic profile washer
Note Always use a flow limiter when operating the appliance
with a thermostatic valve.
Flexible water connection lines
 If the appliance is installed with flexible water connection
lines. ensure that the pipe bends do not become twisted.
Pipe bends have a bayonet fitting and are installed inside the
appliance.
 Secure the back panel at the bottom with an additional
screw.
9.1 Installation site
!Material damage
Install the appliance in a room free from the risk of frost.
 Always install the appliance vertically near the draw-off
point.
The appliance is suitable for undersink and oversink installations.
Note The appliance must be fitted to a wall with sufficient
load-bearing capacity.
Undersink installation
26�02�02�1373
1
2
1 Cold water inlet
2 DHW outlet
Oversink installation
26�02�02�1374
12
1 Cold water inlet
2 DHW outlet
9.2 Factory settings
The appliances are prepared in the delivered condition:
- Power supply from “below”. installation on unfinished walls
- Water connection. installation on unfinished walls
10. Installation
This chapter describes installation in accordance with the factory
settings.
For further installation options. see chapter “Installation alterna-
tives”.
26�02�02�1367
 Open the appliance.

ENGLISH
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INSTALLATION
Installation
26�02�02�1101
 Press the two locking hooks and remove the lower part of
the back panel towards the front.
26�02�02�0810�
 Mark out the holes for drilling using the installation template.
 Drill the holes and secure the mounting bracket with
2screws and 2rawl plugs (screws and rawl plugs are not
part of the standard delivery).
Note If you are installing the appliance with flexible water con-
nections. secure the back panel with a screw.
 Fit the mounting bracket.
160
≥ 30
26�02�02�0887
 Prepare the power cable.
Making the water connection
!Material damage
Carry out all water connection and installation work in
accordance with regulations.
12
D0000053319
 Seal and insert the twin nipples.
1 2
26�02�02�0799
1 DHW tee
2 Cross-piece
 Secure the tee and cross-piece, with a flat gasket each, to the
twin nipples.
Fitting the strainer
!Material damage
The strainer must be fitted for the appliance to function.
 When replacing the appliance. check that the strain-
er is present.
26�02�02�0856
 Fit the strainer provided in the cold water inlet of the
appliance.
Installing the DMB flow limiter
26�02�02�0857
 Install the flow limiter provided in the cold water inlet of the
appliance.

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INSTALLATION
Installation
Installing the appliance
26�02�02�0811
 For easy installation. push the cable grommet of the upper
electrical connection into the back panel from behind.
 Remove the transport plugs from the water connections.
 Remove the fixing toggle from the upper part of the back
panel.
 Route the power cable from behind through the cable grom-
met until it rests against the cable sheath. Align the power
cable.
In the case of a cross-section >6mm². enlarge the hole in
the cable grommet.
 Push the appliance over the threaded stud of the mounting
bracket. so that it breaks through the soft seal. If necessary.
use a screwdriver.
 Push the fixing toggle onto the threaded stud of the mount-
ing bracket.
 Press the back panel firmly into place and lock the fixing tog-
gle by turning it through 90°.
26�02�02�0858
 Fit the pipes with flat gaskets onto the twin nipples.
Connecting the power supply
WARNING Electrocution Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Electrocution Connection to the power supply is only permissible in the
form of a permanent connection in conjunction with the
removable cable grommet. The appliance must be able
to be separated from the power supply by an isolator
that disconnects all poles with at least 3 mm contact
separation.
WARNING Electrocution Ensure that the appliance is earthed.
26�02�02�1122�
 Connect the power cable to the mains terminal (see chapter
“Specification / Wiring diagram”). The specified voltage must
match the mains voltage.

ENGLISH
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INSTALLATION
Installation
10.1 Completing the installation
26�02�02�1102�
 Fit the lower part of the back panel. Ensure that it clicks into
place.
 Align the appliance by carrying out the following: Loosen
the fixing toggle and align the power supply and back panel.
Retighten the fixing toggle. If the back panel of the appliance
is not flush. the appliance can be secured at the bottom with
an additional screw.
10.2 Alternative installation methods
- Power supply from above for unfinished walls
- large cross-section for power supply from below
- Connecting a load shedding relay
- Water installation for finished walls
- Water installation for finished walls with solder/compression
fitting
- Water installation on finished walls. fitting the appliance cap
- Installing lower part of back panel
- Use of existing mounting bracket when replacing an
appliance
- Installation for offset tiles
Power supply from above for unfinished walls
26�02�02�1123�
 Cut off the cable grommet for the power cable.
 Push down and remove the locking hook that secures the
mains terminal. then remove the mains terminal.
 Reposition the mains terminal from the bottom to the top.
Secure the mains terminal by pushing it under the locking
hook.
Conductor cross-sections for power supply from below
If cables with a large cross-section are used. the cable grommet
can be fitted after the appliance has been installed.
1.
3. 4.
2.
26�02�02�1370
 Before installing the appliance. use a screwdriver to push the
cable grommet out.
 Push the cable grommet over the power cable. In the case
of a cross-section >6mm². enlarge the hole in the cable
grommet.
 Push the cable grommet into the back panel and click grom-
met into place.
Connecting a load shedding relay
Install the 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.
The load shedding relay is available as an accessory.
!Material damage
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”).
Water installation for finished walls
Suitable pressure-tested taps can be ordered as accessories.
D0000033104
1
2
1 Water plugs
2 Taps

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INSTALLATION
Installation
 Fit the water plugs with gaskets to seal the connection below
the plaster. With twin-lever pressure-tested taps. the plugs
and gaskets are part of the standard delivery. For pressure-
tested taps other than those recommended by us. plugs and
gaskets can be ordered as accessories.
 Install the tap.
 Push the lower part of the back panel under the connecting
pipes of the tap and push it into the back panel.
 Secure the connecting pipes to the appliance.
Water installation for finished walls with solder/compression
fitting
You can connect copper or plastic pipes with the accessories “sol-
der fitting” or “compression fitting”.
With the “solder fitting” with threaded connection for 12mm cop-
per pipe. proceed as follows:
 Push the union nuts over the connecting pipes.
 Solder the inserts to the copper pipes.
 Push the lower part of the back panel under the connecting
pipes of the tap and push it into the back panel.
 Secure the connecting pipes to the appliance.
Note Observe the tap/valve manufacturer's instructions!
Water installation on finished walls. fitting the appliance cap
see “Appliance description / Accessories” chapter.
2
3
1
26�02�02�0919
1 Cap guides
2 Knock-out
3 Screw
 Cleanly break out the knock-outs in the appliance cap. If nec-
essary. use a file.
 Push the cap guides provided into the knock-outs.
 Secure the back panel at the bottom with a screw. This is
also relevant if flexible water pipework is used.
Installing lower part of back panel
If using threaded connections for finished walls. the lower part of
the back panel can also be installed after fitting the taps/valves.
To do this. carry out the following steps:
 Cut open the lower part of the back panel.
 Fit the lower part of the back panel by bending it out at the
sides and guiding it over the pipes.
 Insert the connection pieces from behind into the lower part
of the back panel.
 Click the lower part of the back panel into place.
 Secure the lower part of the back panel with a screw.
2
1
3
26�02�02�1080
1 Lower part of back panel
2 Connection piece from the pack
3 Screw
Mounting bracket for appliance replacement
Am existing StiebelEltron mounting bracket may be used when
replacing appliances (except instantaneous water heater DHF).
 Break through the back panel of the appliance for the thread-
ed stud on the pre-installed mounting bracket.
DHF replacement
26�02�02�0815�
 Reposition the threaded stud on the mounting bracket (the
stud has a self-tapping thread).
 Rotate the mounting bracket through 180° and mount it on
the wall (the DHF logo is then turned towards the reader).
Installation for offset tiles
110
20
26�02�02�1371
2
1
1 Minimum contact area of the appliance
2 Maximum tile offset

ENGLISH
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INSTALLATION
Commissioning
 Adjust the wall clearance and lock the back panel with the
fixing toggle by turning it clockwise through 90°.
11. Commissioning
WARNING Electrocution Commissioning may only be carried out by an authorised
contractor in accordance with safety regulations.
11.1 Commissioning
≥ 60 s
D0000052474
 Open and close all connected draw-off valves several times.
until all air has been vented from the pipework and the
appliance.
 Carry out a tightness check.
 Activate the safety pressure limiter. The instantaneous water
heater is supplied with the safety pressure limiter in the trig-
gered state. Activate the safety pressure limiter at flow pres-
sure by pressing the reset button with a screwdriver.
 Fit the appliance cap and secure it with a screw.
 Switch the mains power ON.
 Check the function of the appliance.
 Remove the protective foil from the user interface.
Appliance handover
 Explain the appliance function to users and familiarise them
with its operation.
 Make users aware of potential dangers. especially the risk of
scalding.
 Hand over these instructions.
11.2 Recommissioning
!Material damage
Following an interruption of the water supply. recommis-
sion the appliance by carrying out the following steps. in
order to prevent the destruction of the bare wire heating
system.
 Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
 Open the tap until the appliance and its upstream
cold water inlet line are free of air.
 Switch the mains power back ON again.
12. Shutting down
 Isolate all poles of the appliance from the power supply.
 Drain the appliance (see chapter “Maintenance”).

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INSTALLATION
Troubleshooting
13. Troubleshooting
WARNING Electrocution In order to check the appliance. it must be supplied
with power.
13.1 Display options for LED diagnostic traffic light
Possible indications
Red Illuminates in case of faults
Yellow Illuminates in heating mode
Green Flashing: appliance is supplied with
mains power
13.2 Fault table
Fault / diagnostic traffic light LED display Cause Remedy
The appliance does not start. The shower head / aerators are scaled up. Descale or if necessary replace the shower head /
aerators.
Inadequate flow rate. The sieve in the appliance is dirty. Clean the strainer.
The temperature is not achieved. One phase down. Check the MCB/fuse in your fuse box.
The heater does not switch on. The air sensor detects the presence of air in the
water and briefly switches the heater off.
The appliance restarts after one minute.
No hot water and no traffic light display. The MCB/fuse has responded/blown. Check the MCB/fuse in your fuse box.
The safety pressure limiter (see chapter “Specifica-
tion / Wiring diagram” has switched off.
Remove the cause of the fault (e.g. faulty pressure
washer).
Protect the heating system against overheating by
opening a draw-off valve downstream from the ap-
pliance for one minute. This depressurises and cools
down the heater. Activate the safety pressure limiter
at flow pressure by pressing the reset button; see
also chapter “Commissioning”.
The PCB is faulty. Check the PCB and replace if necessary.
No hot water at flow rate of > 23 l/min.
Traffic light display: green flashing.
The PCB is faulty. Check the PCB and replace if necessary.
The flow sensor is not plugged in. Plug the flow sensor plug back in.
The flow sensor is faulty. Check the flow sensor and replace it if required.
No hot water at flow rate of > 23 l/min.
Traffic light display: yellow constantly on; green
flashing.
The high limit safety cut-out has responded (see
chapter “Specification / wiring diagram” or has suf-
fered a break in continuity.
Check the high limit safety cut-out and replace it if
required.
The heating system is faulty. Check the resistance of the heating system. and re-
place the appliance if required.
The PCB is faulty. Check the PCB and replace if necessary.
No hot water.
Traffic light display: red constantly on; green flash-
ing.
The cold water inlet temperature exceeds 35 °C. Reduce the cold water inlet temperature to the ap-
pliance.
The cold water sensor is faulty. Check the PCB and replace if necessary.

ENGLISH
www.stiebel-eltron.com HDB-E Si | 29
INSTALLATION
Maintenance
14. Maintenance
WARNING Electrocution Before any work on the appliance. disconnect all poles
from the power supply.
Draining the appliance
You can drain the appliance for maintenance work or to protect
it from frost.
CAUTION Scalding Hot water may escape when draining the appliance.
 Close the shut-off valve in the cold water supply line.
 Open all draw-off valves.
 Undo the water connections on the appliance.
 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.
15. Specification
15.1 Dimensions and connections
b02
c01c06
470
100
414
40
11720225
140
35
368
30
338
47
b03
35
D0000023609
b02 Entry electrical cables I
b03 Entry electrical cables II
c01 Cold water inlet Male thread G 1/2 A
c06 DHW outlet Male thread G 1/2 A
15.2 Wiring diagram
3/PE ~ 380 - 415 V
85�02�02�0005
1 Bare wire heating system
2 High limit safety cut-out
3 Safety pressure limiter
Priority control with load shedding relay (LR 1-A)
See also chapter “Appliance description / Accessories”.
85�02�02�0003�
2
1
1 Control cable to the contactor of the second appliance (e.g.
electric storage heater).
2 Control contact opens when switching the instantaneous
water heater on.

30 | HDB-E Si www.stiebel-eltron.com
INSTALLATION
Specication
15.3 DHW output
The DHW output is subject to the mains voltage, the appliance’s
connected load and the cold water inlet temperature. The rated
voltage and rated output can be found on the type plate (see
chapter “Operation / Troubleshooting”).
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
10.1 4.4 5.2 6.3 8.0
11.0 4.8 5.6 6.8 8.7
12.0 5.2 6.1 7.5 9.5
12.2 5.3 6.2 7.6 9.7
13.2 5.7 6.7 8.2 10.5
13.5 5.8 6.9 8.4 10.7
13.6 5.9 6.9 8.4 10.8
14.2 6.1 7.2 8.8 11.3
14.5 6.3 7.4 9.0 11.5
15.0 6.5 7.7 9.3 11.9
16.2 16.2 7.0 8.3 10.1 12.9
16.3 7.1 8.3 10.1 12.9
18.0 7.8 9.2 11.2 14.3
19.0 8.2 9.7 11.8 15.1
19.4 8.4 9.9 12.0 15.4
21.0 9.1 10.7 13.0 16.7
21.7 9.4 11.1 13.5 17.2
22.6 9.8 11.5 14.0 17.9
23.5 10.2 12.0 14.6 18.7
24.0 10.4 12.2 14.9 19.0
24.4 10.6 12.4 15.2 19.4
25.8 11.2 13.2 16.0 20.5
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
10.1 3.2 3.6 4.1 4.8
11.0 3.5 3.9 4.5 5.2
12.0 3.8 4.3 4.9 5.7
12.2 3.9 4.4 5.0 5.8
13.2 4.2 4.7 5.4 6.3
13.5 4.3 4.8 5.5 6.4
13.6 4.3 4.9 5.6 6.5
14.2 4.5 5.1 5.8 6.8
14.5 4.6 5.2 5.9 6.9
15.0 4.8 5.4 6.1 7.1
16.2 16.2 5.1 5.8 6.6 7.7
16.3 5.2 5.8 6.7 7.8
18.0 5.7 6.4 7.3 8.6
19.0 6.0 6.8 7.8 9.0
19.4 6.2 6.9 7.9 9.2
21.0 6.7 7.5 8.6 10.0
21.7 6.9 7.8 8.9 10.3
22.6 7.2 8.1 9.2 10.8
23.5 7.5 8.4 9.6 11.2
24.0 7.6 8.6 9.8 11.4
24.4 7.7 8.7 10.0 11.6
25.8 8.2 9.2 10.5 12.3
15.4 Application areas/ conversion table
Specific electrical resistance and specific electrical conductivity
(see chapter “Installation/ Specification/ Data table”).
Standard specification
at 15 °C 20°C 25°C
Spec. re-
sistance
ρ ≥
Spec. conduc-
tivity σ≤
Spec. re-
sistance
ρ ≥
Spec. conduc-
tivity σ≤
Spec. re-
sistance
ρ ≥
Spec. conduc-
tivity σ≤
Ωcm mS/m μS/cm Ωcm mS/m μS/cm Ωcm mS/m μS/cm
1100 91 909 970 103 1031 895 112 1117
1200 83 833 1070 93 935 985 102 1015
15.5 Pressure drop
Pressure drop at taps at flow rate of 10 l/min
Mono-lever mixer tap. approx. MPa 0.04 - 0.08
Thermostatic valve. approx. MPa 0.03 - 0.05
Hand shower. approx. MPa 0.03 - 0.15
Sizing the pipework
When calculating the size of the pipework. a pressure drop for the
appliance of 0.1MPa is recommended.
15.6 Fault conditions
In case of faults. loads up to a maximum of 95 °C at a pressure of
1.2 MPa can occur temporarily in the installation.

ENGLISH
www.stiebel-eltron.com HDB-E Si | 31
INSTALLATION
Specication
15.7 Details on energy consumption
Product data complies with EU regulations relating to the Directive
on the ecodesign of energy related products (ErP).
HDB-E 12 Si HDB-E 18 Si HDB-E 21 Si HDB-E 24 Si
232003 232004 232005 232006
Manufacturer STIEBEL ELTRON STIEBEL ELTRON STIEBEL ELTRON STIEBEL ELTRON
Load profile S S S S
Energy efficiency class A A A A
Annual power consumption kWh 468 480 477 475
Energy conversion efficiency %39 39 39 39
Default temperature setting °C 55 55 55 55
Special information on measuring efficiency None None None None
15.8 Data table
HDB-E 12 Si HDB-E 18 Si HDB-E 21 Si HDB-E 24 Si
232003 232004 232005 232006
Electrical data
Rated voltage V380 400 415 380 400 415 380 400 415 380 400 415
Rated output kW 9.7 10.7 11.5 16.2 18 19.4 19 21 22.6 21.7 24 25.8
Rated current A14.4 15.5 16 24.7 26 27 29.5 31 32.2 33.3 35 36.3
MCB/fuse rating A16 16 16 25 25 32 32 32 32 35 35 40
Phases 3/PE 3/PE 3/PE 3/PE
Frequency Hz 50/60 50/60 50/- 50/60 50/60 50/- 50/60 50/60 50/- 50/60 50/60 50/-
Max. mains impedance at 50Hz Ω 0.379 0.360 0.347 0.325 0.308 0.297 0.284 0.270 0.260
Specific resistance ρ15 ≥ (at ϕcold ≤35°C) Ω cm ≥1100 ≥1100 ≥1200 ≥1100 ≥1100 ≥1200 ≥1100 ≥1100 ≥1200 ≥1100 ≥1100 ≥1200
Specific conductivity σ15 ≤ (at ϕcold ≤35°C) μS/cm ≤910 ≤910 ≤830 ≤910 ≤910 ≤830 ≤910 ≤910 ≤830 ≤910 ≤910 ≤830
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 1111
Values
Max. permissible inlet temperature °C 35 35 35 35
On l/min >2.3 >2.3 >2.3 >2.3
Flow rate for pressure drop l/min 3.1 5.2 6.0 6.9
Pressure drop at flow rate MPa 0.07 (0.02 without
DMB)
0.08 (0.06 without
DMB)
0.10 (0.08 without
DMB)
0.13 (0.1 without DMB)
Flow rate limit at l/min 47.5 7.5 8.5
DHW delivery l/min 5.5 9.0 10.5 12
Δϑon delivery K28 28 28 28
Hydraulic data
Nominal capacity l0.4 0.4 0.4 0.4
Versions
Temperature setting range °C 55 55 55 55
Safety category 1 1 1 1
Insulating block Plastic Plastic Plastic Plastic
Heating system heat generator Bare wire Bare wire Bare wire Bare wire
Cover and back panel Plastic Plastic Plastic Plastic
Colour white white white white
IP rating IP25 IP25 IP25 IP25
Dimensions
Height mm 470 470 470 470
Width mm 225 225 225 225
Depth mm 117 117 117 117
Weights
Weight kg 3.6 3.6 3.6 3.6

32 | HDB-E Si www.stiebel-eltron.com
GUARANTEE | ENVIRONMENT AND RECYCLING
GUARANTEE | ENVIRONMENT AND
RECYCLING
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.



Deutschland
STIEBEL ELTRON GmbH & Co. KG
Dr.-Stiebel-Straße 33 | 37603 Holzminden
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.de
Verkauf Tel. [phone] | Fax [phone] | [email protected]
Kundendienst Tel. [phone] | Fax [phone] | [email protected]
Ersatzteilverkauf Tel. [phone] | Fax [phone] | [email protected]
Irrtum und technische Änderungen vorbehalten! | Subject to errors and technical changes! | Sous réserve
d‘erreurs et de modifications techniques! | Onder voorbehoud van ver
g
issin
g
en en technische wi
j
zi
g
in
g
en! |
Salvo error o modificación técnica! | Excepto erro ou alteração técnica | Zastrzeżone zmian
y
techniczne i
ewentualne błędy | Omyly a technické změny jsou vyhrazeny! | A muszaki változtatások és tévedések
j
o
g
át
fenntartjuk! | Отсутствие ошибок не гарантируется. Возможны технические изменения. | Ch
y
b
y
a
technické zmeny sú vyhradené! Stand 9046
Australia
STIEBEL ELTRON Australia Pty. Ltd.
6 Prohasky Street | Port Melbourne VIC 3207
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel.com.au
Austria
STIEBEL ELTRON Ges.m.b.H.
Eferdinger Str. 73 | 4600 Wels
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.at
Belgium
STIEBEL ELTRON bvba/sprl
't Hofveld 6 - D1 | 1702 Groot-Bijgaarden
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.be
China
STIEBEL ELTRON (Guangzhou) Electric
Appliance Co., Ltd.
Rm 102, F1, Yingbin-Yihao Mansion, No. 1
Yingbin Road
Panyu District | 511431 Guangzhou
Tel. [phone] | Fax [phone]
[e-mail]
www.stiebeleltron.cn
Czech Republic
STIEBEL ELTRON spol. s r.o.
K Hájům 946 | 155 00 Praha 5 - Stodůlky
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.cz
Finland
STIEBEL ELTRON OY
Kapinakuja 1 | 04600 Mäntsälä
Tel. [phone]
[email protected]
www.stiebel-eltron.fi
France
STIEBEL ELTRON SAS
7-9, rue des Selliers
B.P 85107 | 57073 Metz-Cédex 3
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.fr
Hungary
STIEBEL ELTRON Kft.
Gyár u. 2 | 2040 Budaörs
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.hu
Japan
NIHON STIEBEL Co. Ltd.
Kowa Kawasaki Nishiguchi Building 8F
66-2 Horikawa-Cho
Saiwai-Ku | 212-0013 Kawasaki
Tel. [phone] | Fax [phone]
[email protected]
www.nihonstiebel.co.jp
Netherlands
STIEBEL ELTRON Nederland B.V.
Daviottenweg 36 | 5222 BH 's-Hertogenbosch
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.nl
Poland
STIEBEL ELTRON Polska Sp. z O.O.
ul. Działkowa 2 | 02-234 Warszawa
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.pl
Russia
STIEBEL ELTRON LLC RUSSIA
Urzhumskaya street 4,
building 2 | 129343 Moscow
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.ru
Slovakia
TATRAMAT - ohrievače vody s.r.o.
Hlavná 1 | 058 01 Poprad
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.sk
Switzerland
STIEBEL ELTRON AG
Industrie West
Gass 8 | 5242 Lupfig
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.ch
Thailand
STIEBEL ELTRON Asia Ltd.
469 Moo 2 Tambol Klong-Jik
Amphur Bangpa-In | 13160 Ayutthaya
Tel. [phone] | Fax [phone]
[e-mail]
www.stiebeleltronasia.com
United Kingdom and Ireland
STIEBEL ELTRON UK Ltd.
Unit 12 Stadium Court
Stadium Road | CH62 3RP Bromborough
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron.co.uk
United States of America
STIEBEL ELTRON, Inc.
17 West Street | 01088 West Hatfield MA
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron-usa.com
A 296852-38950-9067 B 298033-38950-9067
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