STIEBEL ELTRON HDB-E Series Electronically Controlled Comfort Instantaneous Water Heater Instruction Manual

: August 14, 2024
: STIEBEL ELTRON

Table of Contents

STIEBEL ELTRON HDB-E Series Electronically Controlled Comfort
Specifications
Usage Instructions
Settings
Maintenance and Cleaning
Installation
FAQs
Cleaning, care and maintenance
Troubleshooting
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

STIEBEL ELTRON HDB-E Series Electronically Controlled Comfort

Instantaneous Water Heater

Specifications

Brand: Stiebel Eltron
Model: DKCF111YATALW12 M YCTAHOBKA
Product Type: Water Heater

Product Information
The Stiebel Eltron water heater is designed to provide hot water for various applications. It comes with safety features and settings for temperature control.

Usage Instructions

Safety Information
Before operating the water heater, carefully read and understand all safety instructions provided in the user manual.

Settings

Temperature Adjustment: Use the settings to adjust the water temperature according to your preference.
Recommendations: Follow the manufacturer’s recommendations for optimal performance.

Maintenance and Cleaning

Regular cleaning and maintenance are essential for the efficient operation of the water heater. Refer to the user manual for detailed instructions on cleaning and maintenance procedures.

Installation

Ensure that the water heater is installed by a qualified professional following all safety regulations and guidelines provided in the user manual.

FAQs

Problem: No Voltage
Cause: There is no voltage supply.
Solution: Check the power source and ensure the water heater is properly connected to a power supply.

Problem: Clogged or Dirty Showerhead
Cause: The showerhead or faucet aerator is clogged or dirty.
Solution: Clean or replace the showerhead or faucet aerator to restore proper water flow.

SPECIAL INFORMATION OPERATION

-The appliance may be used by children aged 3 and older and persons with reduced physical, sensory or mental capabilities or alack 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 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 temperatures up to 70 ° C. There is arisk of scalding at outlet temperatures in excess of 43 ° C.
-The appliance is suitable for supplying a shower ( shower operation).
-Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3mm contact separation.
-The specified voltage must match the power supply.
-The appliance must be connected to the earth conductor.

1. General information
The chapters ” Special information” and ” Operation” are intended for appliance users and qualified contractors.
The chapter ” Installation” is intended for qualified contractors.
Notice Read these instructions carefully before using the appliance and retain them for future reference. Pass on these instructions to anew user if required.

1.1 Safety instructions
1.1.1 Structure of safety instructions
/ SIGNAL WORD 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
IN

Type of risk Injury
Electrocution

A

Burns (burns, scalding)

-The appliance must be permanently connected to fixed wiring.

1.1.3 Signal words

-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”).

SIGNAL WORD DANGER
WARNING
CAUTION

Meaning
Failure to observe this information will result in serious injury or death.
Failure to observe this information may result in serious injury or death.
Failure to observe this information may result in non -serious or minor injury.

-Drain the appliance as described in chapter “Installation / Maintenance / Draining the appliance”.

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1.2 Other symbols in this documentation
Notice General information is identified by the adjacent symbol.
Read these texts carefully.

Symbol

Meaning
Property damage (appliance damage, consequential losses and environmental pollution)
Appliance disposal

This symbol indicates that you have to do something. The action you need to take is described step by step.
1.3 Units of measurement
Notice All measurements are given in mm unless stated otherwise.
2. Safety
2.1 Intended use
The appliance is intended for heating domestic hot water and can supply one or more draw- off points.
The appliance is intended for domestic use. lt can be used safely by untrained persons. The appliance can also be used in non -domestic 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 inappropriate. 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 arisk 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, apermanent and unchangeable temperature limit is necessary. Ask your qualified contractor to adjust the maximum temperature.

A WARNING Injury ·The appliance may be used by children aged 3and older and persons with reduced physical, sensory or mental capabilities or alack 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 potential risks. Children must never play with the appliance. Cleaning and user maintenance must not be carried out by children without supervision.
C) Property damage The user should protect the appliance and its tap against frost.
2.3 Test mark
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 temperature is adjustable inside the appliance. Upwards of acertain 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 automatic output matching maintains aconsistent outlet temperature. lt does so irrespective of the inlet temperature, up to the maximum output of the appliance.
This appliance is not approved for reheating preheated water.
Heating system
The bare wire heating system is enclosed within apressure- tested plastic jacket. The heating system with its stainless steel heater spiral 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.
Notice The appliance is equipped with an air detector that largely prevents damage to the heating system. If, during operation, air is drawn into the appliance, the appliance shuts down heating output for one minute to protect the heating system.

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OPERATION Settings

Following an interruption of the water supply
Property damage
To ensure that the bare wire heating system is not damaged following an interruption to the water supply, the appliance must be recommissioned by taking the following steps. · Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs. · Open and close all connected draw- off valves several
times for at least one minute until all air has been purged from the pipework and the appliance. · Switch on the power supply again.
4. Settings
4.1 Setting the temperature
The DHW outlet temperature is set at the factory to 55 °C( relative to arated voltage of 400 V, see chapter ” Installation / Commissioning / Preparations”). Your qualified contractor can set alower temperature inside the appliance.
Notice
If the outlet temperature is not high enough when the draw- off valve is fully open, then more water is flowing through the appliance than can be heated by the heating system ( appliance working at maximum output). · Reduce the water volume at the tap.

Cleaning, care and maintenance

· Never use abrasive or corrosive cleaning agents. Adamp cloth is sufficient for cleaning the unit.
· Check the taps regularly. Limescale deposits at the tap outlets can be removed using commercially available descaling agents.

6. Troubleshooting

Problem The appliance will not start despite the DHW valve being fully open.
When hot water is being drawn off, cold water flows for ashort period. The temperature is not achieved.

Cause

Remedy

There is no power.

Check the fuses / MCBs in your fuse box / distribution board.

The aerator in the tap or Clean and/or descale the the shower head is scaled aerator or shower head. up or dirty.

The water supply has been interrupted.

Vent the appliance and the cold water supply line.

The air sensor is detecting air in the water. It briefly switches off the heating output.

The appliance restarts automatically after 1minute.

The temperature set inside the appliance is too low.

Ask your qualified contractor to readjust the temperature.

The appliance has

Reduce the flow rate.

reached its output limit.

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).

4.2 Recommended settings
Your instantaneous water heater offers maximum precision and maximum convenience in DHW provision. If you nonetheless operate the appliance with athermostatic valve, we recommend that you:
Ask your qualified contractor to set the temperature to 55 ° C inside the appliance. Then set the required set temperature on the thermostatic valve.
Saving energy
The following recommended settings will result in the lowest energy consumption: – 35 °Cfor hand washbasins – 55 °Cfor kitchen sinks
Temperature limits (qualified contractors)
If required, the qualified contractor can set apermanent temperature limit, for example in nurseries, hospitals, etc.
Limiting it in this way prevents water from flowing out of the appliance at temperatures which could cause injury.

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INSTALLATION Safety

INSTALLATION
Step-by-step guide Preparing for installation

– Flat gaskets – Strainer – Plastic profile washer – Plastic connection pieces / installation aid – Cover and back panel guides – jumper for temperature setting – jumper for changing the output ( only for appliances with ad-
justable output)

7. Safety
Only aqualified contractor should carry out installation, commissioning, 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.
Property damage Observe the maximum inlet temperature. Higher temperatures may damage the appliance. You can limit the maximum inlet temperature by installing acentral thermostatic valve.
WARNING Electrocution This appliance contains capacitors which are discharged when disconnected from the power supply. The capacitor discharge voltage may briefly exceed > 60 VDC.
7.2 Instructions, standards and regulations
Notice 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 electrical resistivity of the water must not fall below that stated on the type plate. In alinked water network, take into consideration the lowest electrical resistivity of the water. Your water supply utility will advise you of the electrical resistivity or conductivity of the water in your area.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance: – Wall mounting bracket – Installation template – 2twin nipples – 3-way ball shut-off valve for cold water – Tee for domestic hot water

8.2 Accessories
Taps – MEKD mono lever kitchen pressure tap – MEBD mono lever bath pressure tap
Water plugs G1/2 A If you use taps other than the recommended pressure taps on finished walls, please use the plugs.
Installation set, surface- mounted – Solder fitting – copper pipe for soldered connection 12 mm – Press fitting – copper pipe – Press 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 ( G3/8A) 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 agas 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).
Pipe assembly for DHB water plug-in couplings Use the water plug-in couplings if the existing installation contains water plug-in connections from aDHB 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 operated simultaneously.

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INSTALLATION Preparation

9. Preparation

9.2 Minimum clearances

9.1 Installation site
C) Property damage Install the appliance in aroom that is free from the risk of frost. > Always install the appliance vertically and near the draw- off
point. For horizontal installation, see chapter ” Installation alternatives / Horizontal installation of the appliance”. The appliance is suitable for undersink and oversink installation. Undersink installation
1 Cold water inlet 2 DHW outlet Oversink installation
1 Cold water inlet 2 DHW outlet

Maintain the minimum clearances to ensure trouble- free operation of the appliance and facilitate maintenance work.
9.3 Water installation
Flush the water line thoroughly.
Taps Use appropriate pressure taps. Open vented taps are not permissible.
MEI Notice 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 supply line:
Pipes made from galvanised steel, stainless steel, copper or plastic – DHW outlet line: Pipes made from stainless steel, copper or plastic
OProperty damage If plastic pipework systems are used, take into account the maximum inlet temperature and the maximum permissible pressure.

Notice > Mount the appliance on the wall. The wall must have
sufficient load bearing capacity.

Flow rate

Ensure that the flow rate for switching on the appliance is achieved.
If the required flow rate is not achieved when the drawoff valve is fully open, increase the water line pressure. If the flow rate is still not achieved, remove the flow limiter (see chapter ” Installation / Installation / Removing the flow limiter”).

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INSTALLATION In sta Ration

10. Installation

Fitting the wall mounting bracket

Factory settings
Temperature Connected load Adjustable connected load

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°C

55

kW

13.5
X

18-

21

27

X

Standard installation
Electrical connection from below, flush -mounted Water connection, flush -mounted

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X

x

X

For further installation options, see chapter “Alternative installation methods”.

Mark out the holes for drilling using the installation template. If the appliance is to be installed on finished walls, also mark out the fixing hole in the lower section of the template.
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).
Fit the wall mounting bracket.
Installing the twin nipples

10.1 Standard installation
Opening the appliance

OProperty damage Carry out all water connection and installation work in accordance with regulations.

Open the appliance by holding the fascia at the side and pulling forwards away from the appliance cover. Undo the screw. Pivot open the appliance cover.

Seal and insert the twin nipples. Making the water connection

Remove the back panel by pressing the two locking tabs and pulling the lower back panel section forwards.
Preparing the power cable on unfinished walls, for connection from below
1 Cable entry installation aid I> Prepare the power cable.

1 DHW with tee 2 Gasket 3 Cold water with 3-way ball shut-off valve 4 Strainer 5 Plastic profile washer

Secure the tee and 3-way ball shut-off valve, each with aflat gasket, to the twin nipple.
OProperty damage The strainer must be fitted for the appliance to function. > When replacing an appliance, check whether the strainer is installed.

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INSTALLATION
Installation
Removing the flow limiter
Notice If you are using athermostatic valve, you must not remove 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.

Release the locking tab.
Push the function module on the back panel gently backwards.
Remove the function module from the appliance back panel by pulling it slightly forwards and lifting it off.

1 Cold water pipe bend with recess for spring clip 2 0-ring 3 Flow limiter 4 Spring clip 5 Heater > Remove the cold water pipe bend and the 0-ring. > Remove the flow limiter from the cold water inlet of the heat-
er using apointed object or suitable pliers. > Fit the cold water pipe bend with the 0-ring.
OProperty damage The 0-ring must be fitted to prevent the appliance from leaking. > As part of installation, check that the 0-ring is in place.

Secure the cold water pipe bend with the spring clip.
OProperty damage Ensure that the spring clip is located behind the recess in the pipe bend and that it is securely holding the pipe bend in place.
Fit the function module on the appliance back panel in reverse order until it clicks into place.

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Installation

Installing the appliance

Step-by-step guide Installation

Notice If you are installing the appliance with flexible pipe connections, also secure the back panel with ascrew.
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). · Remove the cable grommet from the back panel. · 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.

· Fit the pipe connections with flat gaskets onto the water connections.
· Open the 3-way ball shut-off valve or the shut-off valve in the cold water supply line.
Making the electrical connection
f WARNING Electrocution 7 Carry out all electrical connection and installation work
in accordance with relevant regulations.
z WARNING Electrocution 7 The connection to the power supply must be in the form
of apermanent connection in conjunction with the removable cable grommet. Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3mm contact separation.
Af WARNING Electrocution 7 Ensure that the appliance is connected to the earth conductor.
C) Property damage Observe the type plate. The specified rated voltage must match the power supply.
· Connect the power cable to the mains terminal.
Fitting the lower back panel section

· Remove the transport protection plugs from the appliance pipe connections.
· Bend the power cable 45° upwards.
· Route the power cable and cable grommet through the back panel from the rear.
· Install the appliance on the threaded studs of the wall mounting bracket.
· Press the back panel firmly into place, aligning it correctly.
· Lock the fixing toggle by turning it 90° clockwise.
· Pull the cable grommets into the back panel until both locking tabs engage.

1 Diffuser on lower back panel
· Fit the lower back panel section into the back panel. Check that both locking tabs are engaged.
· Align the mounted appliance by undoing the fixing toggle, aligning the power supply and back panel, and then re -tightening 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.
C) Property damage The cover plate of the lower back panel section must not bend when installed.

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Commissioning

11. Commissioning

,
dio_ — — —

Step-by-step guide Commissioning

e

11.1 Preparation
Adjusting the temperature via jumper slot

Install the jumper in the required position on the ” Pmax” pin strip.

Jumper position
1
2( Factory setting) 3 No jumper

Connected load
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11.2 Initial start-up

Install the jumper in the required position (= approximate temperature in ° C) on the ” Tmax” pin strip.

Jumper position z 35 z 43 z 50 z 55 ( Factory setting) No jumper

Description For hand washbasins For example in nurseries, hospitals, etc.
For kitchen sink Limit approx. 43 °C

Open and close all connected draw- off valves several times for at least one minute until all air has been purged from the pipework and the appliance.
Carry out atightness check.

Notice Ensure that the set temperature is available at arated voltage of 400 V. If the rated voltage is lower, the outlet temperature is reduced. The table below shows the effect on the outlet temperature subject to the applied rated voltage and the set temperature.

Jumper position
2– 35 2– 43 z 50 z. 55

Outlet temperature at 40 O V* 35,0 °C 43,0 °C 50,0 °C 55,0 °C

Outlet temperature at 380 V* 33,0 °C 40,0 °C 46,0 °C 50,5 °C

Cold water inlet temperature: 15 ° C

Changing the connected load via the jumper slot; only for appliances with selectable connected load
If you select aconnected load other than the factory setting for appliances with selectable connected load, you will need to reposition the jumper.

Activate the safety switch by firmly pressing the reset button (the appliance is delivered with the safety switch disabled).
IM Notice For undersink installation, the appliance cover can be turned the other way up; see chapter ” Installation alternatives / Rotated appliance cover”.

Hook the appliance cover at the top rear into the back panel. Pivot the appliance cover downwards. Check that the appliance cover is securely seated both top and bottom.

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INSTA’ LATE’,”
Shutting down the system

· Tick the selected connected load and rated voltage on the appliance cover type plate ( on both sides). Use aballpoint pen to do this.
· Secure the appliance cover with the screw. · Fit the fascia to the appliance cover. · Remove the protective film from the front panel.
on
o
· Switch on the power supply.
Appliance handover · Explain the appliance function to users and familiarise them
with how it works. · Make users aware of potential dangers, especially the risk of
scalding. · Hand over the instructions.
11.3 Recommissioning
OProperty damage To ensure that the bare wire heating system is not damaged following an interruption to the water supply, the appliance must be recommissioned by taking the following steps. · Disconnect the appliance from the power supply by removing the fuses/tripping the MCBs. · Open and close all connected draw- off valves several times for at least one minute until all air has been purged from the pipework and the appliance. · Switch on the power supply again.

12. Shutting down the system
· Isolate all poles of the appliance from the power supply.
· Drain the appliance ( see chapter ” Maintenance / Draining the appliance”).

13. Installation alternatives

Overview of installation alternatives
Electrical connection On unfinished walls, connected from above On unfinished walls, connected from below, short power cable Surface- mounted

IP rating IP 25 IP 25
IP 24

Water connection Surface- mounted

IP rating IP 24

Other Installation with offset tiles Rotated appliance cover Horizontal installation of the appliance

IP rating IP 25 IP 25 IP 24

A,WARNING Electrocution 7 Before any work on the appliance, disconnect all poles from the power supply.
13.1 Electrical connection from above on unfinished walls
1 Cable entry installation aid · Prepare the power cable.
1
g
1 Cable routing · 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. · Replace the cable grommets. · Install the cable grommet from the top at the bottom. · Pull the cable grommet over the cable sheath of the power cable. · Install the appliance on the threaded studs of the wall mounting bracket. · Push the back panel firmly against the wall. Lock the fixing toggle by turning it 90° clockwise. · Pull the cable grommets into the back panel until both locking tabs engage.
A, · Connect the power cable to the mains terminal. WARNING Electrocution 7 The connecting wires must not protrude beyond the level of the mains terminal.

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INSTALLATION
Installation alternatives
–

13.2 Electrical connection on unfinished walls from below with short power cable

13.4 Connecting aload shedding relay
Install aload shedding relay in the distribution board in conjunction with other electric appliances, e.g. electric storage heaters. The relay responds when the instantaneous water heater starts.
OProperty 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”).

13.5 Water installation, surface- mounted

Reposition the mains terminal further downwards. To do this, undo the fixing screw. Secure the mains terminal in place.
13.3 Electrical connection, surface- mounted

MEI Notice This type of connection changes the IP rating of the appliance. > Change the type plate. Cross out ” IP 25″ and mark the box ” IP 24″. Use aballpoint pen to do this.

[il-E1

Notice This type of connection changes the IP rating of the appliance. > Change the type plate. Cross out ” IP 25″ and mark
the box ” IP 24″. Use aballpoint pen to do this.

i Cable grommet
Electrical connection, surface- mounted Positioned in lower section of appliance Positioned in upper section of appliance

Dimension A 160 110

Prepare the power cable. Fit the cable grommet.

Property damage If you break out the wrong knock-out in the back panel/ appliance cover by mistake, you must use anew back panel/appliance cover.

Cleanly cut and break out the required cable entries from the back panel and appliance cover (for the positions, see chapter ” Specification / Dimensions and connections”). Deburr any sharp edges with afile.
Route the power cable through the cable grommet.
Connect the power cable to the mains terminal.

I> Fit water plugs with gaskets to seal the concealed connections. All taps obtained as accessories are supplied with plugs and gaskets in the standard delivery. For pressure taps other than those recommended by us, plugs and gaskets can be ordered as accessories.

Fit asuitable pressure tap. > Push the lower back panel section under the connection
pipes of the tap and push it into the back panel. > Secure the connection pipes to the tee and the 3-way ball
shut-off valve.
M Notice You can break off the pipe fitting tabs on the lower back panel section if required.
1 Tab

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INSTALLATION
Installation alternatives

13.6 Water installation on finished walls with solder/press fittings
0111 Notice This type of connection changes the IP rating of the appliance. > Change the type plate. Cross out ” IP 25″ and mark the box ” IP 24″. Use aballpoint pen to do this.

13.8 Lower back panel section installation with threaded fittings on finished walls

You can connect copper or plastic pipes with the accessories ” solder fitting” or ” press fitting”.
With ” solder fitting” with threaded fitting for 12 mm copper pipes, proceed as follows: > Push the union nuts over the connection pipes. > Solder the inserts to the copper pipes. > Push the lower back panel section under the connection
pipes of the tap and push it into the back panel. > Secure the connection pipes to the tee and the 3-way ball
shut-off valve.
Notice Observe the tap manufacturer’s instructions.
13.7 Fitting appliance cover for water installation on finished walls

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. To do this, carry out the following steps: > Cut open the lower back panel section. > Fit the lower back panel section by bending it out at the sides
and guiding it over the pipes. > Insert the connection pieces into the lower back panel sec-
tion from behind. > Click the lower back panel section into place. > Secure the lower back panel section with ascrew.
13.9 Wall mounting bracket when replacing an appliance
An existing STIEBEL ELTRON wall mounting bracket may be used when replacing appliances ( except the DHF instantaneous water heater), as long as the fixing screw is in the lower right position.
Replacing aDHF instantaneous water heater

1 Back panel guides 2 Screw 3 Cover guides with sealing lips on the pipe side 4 Pipe knock-out > Cleanly saw and break out the pipe knock-outs in the appli-
ance cover. If necessary, use afile. > 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: > Break the sealing lips out of the cover guides. > Position the back panel guides on the pipes. Push them to-
gether. Then push the guides against the back panel as far they will go. > Secure the lower back panel section with ascrew.
In Notice You can use the cover guides with sealing lips to compensate for aslight offset of the connection pipes and/ or if using the ” press fitting” accessory. In this case, the back panel guides are not fitted.

Reposition the fixing screw on the wall mounting bracket (the fixing screw has aself- tapping thread).
Rotate the wall mounting bracket 180° and mount it on the wall (the DHF logo is then turned towards you).

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Installation alternatives

13.10 Installation with offset tiles
1 Minimum contact area of the appliance
2 Maximum tile offset > Adjust the wall clearance. Lock the back panel in place using
the fixing toggle ( turn 90° clockwise).
13.11 Rotated appliance cover
The appliance cover can be turned the other way up for undersink installation.

13.12 Horizontal installation of the appliance
Notice
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 permissible. – 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 aballpoint 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 ” Installation alternatives”.

Remove the front panel from the apprance cover by pressing the locking tabs and taking out the front panel.
Turn the appliance cover ( not the appliance) the other way up and refit the front panel. Keeping it parallel, push the front panel in until all locking tabs engage. When engaging the locking tabs, apply counter pressure by pushing against the appliance cover from the inside.
WARNING Electrocution ADJ. locking tabs on the front panel must click into place. The locking tabs must be complete and undamaged. If the front panel is not inserted correctly, user protection against contact with live components cannot be ensured.
Hook the appliance cover in at the bottom. Pivot the appliance cover up to the back panel.
Secure the appliance cover. > Fit the cover onto the appliance cover.

1 Cold water inlet
2 DHW outlet
Preparation
The appliance cover must be provided with acondensate drain opening of min. 0 5.0 mm to max. 0 6.0 mm at the marked position.
1 Appliance cover with opening for condensate drain
2 Back panel with additional fixing screw > Drill ahole from the outside through the dismantled appli-
ance cover at the marked point. Alternatively, you can punch ahole 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 afile. > Secure the appliance back panel with an additional screw.
COE Property damage An appliance cover with an existing condensate drain opening must no longer be used for vertical installation of the appliance.

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imc-rA, -1-Info Service information

14. Service information
Overview of connections
3 4
1 Flow sensor 2 High limit safety cut-out, automatic reset 3 Pin strips for connected load and temperature 4 Diagnostic traffic light Appliance cover retainer

Troubleshooting

WARNING Electrocution To test the appliance, it must be connected to the power supply.
Notice When testing the appliance using the diagnostic traffic light, water must be flowing.

Signals of the diagnostic traffic light ( LED)

· O O

red

Lights up in the event of afault

OSO

yellow Lights up in heating mode/flashes when output limit reached

00e1 green Flashing: Appliance connected to power supply

Diagnostic traffic light (draw- off mode)

Fault

Cause

Remedy

No LED lights up Appliance does not One or more mains Check the fuses in

heat up

power supply

the distribution

phases are missing 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

Clean the strainer

Flow meter not plugged in

Check plug-in connection; correct if necessary

Flow meter faulty Replacing the flow

or dirty

meter

PCB faulty

Replace the function module

Green flashing, yellow on, red off

No DHW; outlet

Tap faulty

temperature does

not match set value

Replace tap

Heating system faulty

Replace the function module

PCB faulty

Replace the function module

Green flashing, yellow flashing, red off

No DHW; outlet

Appliance at its

temperature does output limit

not match set value

Reduce flow rate; install flow limiter

Appliance at its output limit

Check jumper position for connected load

Heating system faulty

Replace the function module

Green flashing, yellow off, red on

No DHW; outlet

One or more mains Check the fuses in

temperature does power supply

the distribution

not match set value phases are missing board

Air detection has Continue drawing

responded

water for > 1min

Safety switch not activated during “Commissioning”

Activate the safety switch by firmly pressing the reset button

Safety switch was Check high limit triggered by high safety cut-out limit safety cut-out ( plug-in connec-
tion, connecting cable); activate safety switch

Safety switch re- Replace high limit

sponds again after safety cut-out; ac-

high limit safety tivate safety switch

cut-out has been and draw off water

checked; high

at the maximum

limit safety cut-out set value for > 1min

faulty

Safety switch re- Replace the funcsponds again; PCB tion module faulty

PCB faulty

Replace the function module

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HDB-E Trend I37

TIKte– r^1 I ATTn RI
Maintenance

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 VDC.

Alternative connection options

Draining the appliance
The appliance can be drained for maintenance work.
WARNING Burns Hot water may escape when you drain the appliance.

Close the 3-way ball shut-off valve or the shut-off valve in the cold water supply line.
Open all draw- off valves. > Undo the pipe connections from the appliance. > Store the dismantled appliance free from the risk of frost, as
water residues remaining inside the appliance can freeze and cause damage.
Clean the strainer
If the strainer in the threaded cold water fitting is dirty, clean it. 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.

b02 Entry electrical cables I b03 Entry electrical cables II b04 Entry electrical cables III
17.2 Wiring diagram 3/PE – 380-400V

17. Specification

17.1 Dimensions and connections

Flush- mounted Flush- mounted Surface- mounted

HDB-E Trend

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

b02 Entry electrical cables I c01 Cold water inlet c06 DHW outlet
38 IHDB-E Trend

Flush- mounted Male thread Male thread

HDB-E Trend
G 1/2 G 1/2

1 Control cable to the contactor of the second appliance (e.g. electric storage heater)
2 Control contact drops out when switching the instantaneous water heater on
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INSTALLATION Specification

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 38 ° C DHW output in l/min.

Rated voltage 380 V

Cold water inlet temperature

400 V

5 °C

10 ° C

15 ° C

HDB-E 11/13 Trend

9.9

4.3

5.1

6.1

12.2

5.3

6.2

7.6

11.0

4.8

5.6

6.8

13.5

5.8

6.9

8.4

HDB-E 18 Trend 25A

16.2

7.0

8.3

10.1

18.0

7.8

9.2

11.2

HDB-E 18/21/24 Trend

16.2

7.0

8.3

10.1

19.0

8.2

9.7

11.8

21.7

9.4

11.1

13.5

18.0

7.8

9.2

11.2

21.0

9.1

10.7

13.0

24.0

10.4

12.2

14.9

HDB-E 27 Trend

24.4

10.6

12.4

15.2

27.0

11.7

13.8

16.8

20 °C
7.9 9.7 8.7 10.7
12.9 14.3
12.9 15.1 17.2 14.3 16.7 19.0
19.4 21.4

Connected load in kW 50 ° C DHW output in l/min.

Rated voltage 380 V

Cold water inlet temperature

400 V

5 °C

10 ° C

15 ° C

HDB-E 11/13 Trend

9.9

3.1

3.5

4.0

12.2

3.9

4.4

5.0

11.0

3.5

3.9

4.5

13.5

4.3

4.8

5.5

HDB-E 18 Trend 25A

16.2

5.1

5.8

6.6

18.0

5.7

6.4

7.3

HDB-E 18/21/24 Trend

16.2

5.1

5.8

6.6

19.0

6.0

6.8

7.8

21.7

6.9

7.8

8.9

18.0

5.7

6.4

7.3

21.0

6.7

7.5

8.6

24.0

7.6

8.6

9.8

HDB-E 27 Trend

24.4

7.7

8.7

10.0

27.0

8.6

9.6

11.0

20 ° C
4.7 5.8 5.2 6.4
7.7 8.6
7.7 9.0 10.3 8.6 10.0 11.4
11.6 12.9

17.4 Application areas / conversion table Electrical resistivity and electrical conductivity

Standard specifica-

tion at 15 ° C

20 ° C

25 ° C

Resistivity

Conductivity a 5 Resistivity

Conductivity cr 5 Resistivity

Conductivity a 5

f) ? O cm

mS/m

f) ? pS/cm O cm

mS/m

f) ? pS/cm O cm

mS/m

pS/cm

900

111

1111

800

125

1250

735

136

1361

17.5 Pressure drop

Taps

Tap pressure drop at a flow rate of 10 I./min

Mono lever mixer tap, approx.

MPa

Thermostatic valve, approx.

MPa

Shower head, approx.

MPa

0.04 – 0.08 0.03 – 0.05 0.03 – 0.15

Sizing the pipe/work
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 afault, loads up to 80 ° Cat apressure 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 I814/2013 / ( S.I. 2019 No. 539 / Schedule 2)

HDB-E 11/13 Trend

FIDB-E 18 Trend 25A HDB-E 18/21/24 Trend

HDB-E 27 Trend

204208

207040

204209

204210

Manufacturer Load profile

STIEBEL ELTRON
S

STIEBEL ELTRON S

STIEBEL ELTRON
S

STIEBEL ELTRON
s

Energy efficiency class

A

Energy conversion efficiency

90

39

38

Annual power consumption

kWh

475

479

480

481

Default temperature setting

°C

55

Sound power level

dB(A)

15

Special information on measuring efficiency

Measured with integral flow limiter, at maximum output
and maximum set value

Measured with integral flow limiter and at maximum set
value

Measured with integral flow limiter, at maximum output
and maximum set value

Measured with integral flow limiter and at maximum set
value

Daily power consumption

kWh

2.182

2.200

2.214

2.215

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HDB-E Trend I39

INSTALLATION
Specification

17.8 Data table

Electrical data Rated voltage Rated output Rated current Fuse protection Frequency Phases Resistivity p15 Conductivity an 5 Max. mains impedance at 50 Hz Versions Heating system, heat generator Insulating block Adjustable connected load Temperature setting Protection class Cover and back panel IP rating Colour Connections Water connection Application limits Max. permissible pressure Values Max. inlet temperature ( e.g. pasteurisation) On Flow rate limit at Flow rate at 28 K Flow rate at 50 K Pressure drop for flow rate at 50 K( without flow limiter) Pressure drop for flow rate at 50 K( with flow limiter) Hydraulic data Nominal capacity Dimensions Height Width Depth Weights Weight HDB-E 11/13 Trend HDB-E 18 Trend 25A HDB-E 18/21/24 Trend HDB-E 27 Trend.