STIEBEL ELTRON DHE18AU Instantaneous Water Heater Installation Guide

STIEBEL ELTRON DHE18AU Instantaneous Water Heater

Product Specifications

• Model: Comfort Instantaneous Water Heater
• Control: Fully Electronic
• Manufacturer: Stiebel Eltron

Product Usage Instructions

Operation
The comfort instantaneous water heater is designed to provide hot water on demand. It is fully electronically controlled for efficient and precise temperature regulation.

General Information

1. Safety Instructions: Always follow safety guidelines outlined in the manual to prevent accidents.
2. Other Symbols: Familiarize yourself with symbols used in the documentation for better understanding.
3. Units of Measurement: Ensure you are familiar with the units used in the product specifications.

Safety

1. Intended Use: Use the water heater only for its intended purpose as described in the manual.
2. General Safety Instructions: Follow all safety precautions to ensure safe operation of the appliance.
   Test Symbols: Understand symbols related to testing procedures.

Frequently Asked Questions (FAQ)

• Q: Can children use the water heater?
  A: The appliance may be used by children over 3 years of age under supervision and with proper instructions on safe usage. Children should not play with the appliance unsupervised.

• Q: How should I clean and maintain the water heater?
  A: Refer to the “Cleaning, Care, and Maintenance” section in the manual for detailed instructions on cleaning and maintaining the water heater.

OPERATION AND INSTALLATION
Fully electronically controlled comfort instantaneous water heater

• DHE 18 AU
• DHE 27 AU

SPECIAL INFORMATION

• The appliance may be used by children over 3 years of age and persons with reduced physical, sensory or mental capabilities or a lack of experience and expertise, provided that they are supervised or they have been instructed on how to use the appliance 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.
• If using preheated water, the fitting can reach a temperature of up to 70 °C during operation. There is a risk of scalding at outlet tem-peratures 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 operation, the qualified contractor must adjust the temperature setting range to 43 °C using the internal anti-scalding protection on the appliance. When using preheated water, ensure that the inlet temperature does not exceed 55 °C.
• In Australia, the use of a temperature controller is required to meet the requirements of AS 3498 when showers, bathtubs or washba-sins are supplied with water. The maximum temperature of 50 °C must not be exceeded.
• Ensure the appliance can be separated from the power supply by an isolator that disconnects 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 connected 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
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 appliance and retain them for future reference.
• Pass on these instructions to a new user if required.

Safety instructions

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.

2. Symbols, type of risk

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.

Other symbols in this documentation

•  Note
  General information is identified by the adjacent symbol.

• Read these texts carefully.

• This symbol indicates that you have to do something. The action you need to take is described step by step.

Units of measurement

Note
All measurements are given in mm unless otherwise stated.

 Safety

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-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. General safety instructions

   • CAUTION Burns
     If using preheated water, the fitting can reach a temperature of up to 70 °C during operation. There is a risk of scalding at outlet temperatures in excess of 43 °C.

   • CAUTION Burns
     If operating with preheated water, e.g. from a solar thermal system, the DHW temperature may vary from the selected set temperature.

Appliance description

• CAUTION Burns
  If children or persons with limited physical, sensory or mental capabilities use the appliance, set a temperature limit. Once set, check the temperature limit is working correctly.
  If a permanent and unchangeable temperature limit is required, have the internal anti-scalding protection set by a qualified contractor.

• WARNING Injury
  The appliance may be used by children over 3 years of age and persons with reduced physical, sensory or mental capabilities or a lack of experience and expertise, provided that they are supervised or they have been instructed on how to use the appliance 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.

• WARNING
  For continued safety of this appliance it must be in-stalled, operated and maintained in accordance with the manufacturer’s instructions.

• WARNING
  This appliance may deliver water at high temperature. Refer to the plumbing code of Australia (PCA), local requirements and installation instructions to determine if additional delivery temperature control is required.

• Material losses
  The user should protect the appliance and its tap against frost.

• Test symbols
  See type plate on the appliance.

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 temperature 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 instantaneous water heater with full electronic control and automatic output matching maintains a consistent outlet temperature. The fully electronic control unit with motorised valve ensures the  water is accurately heated to the selected temperature. This occurs regardless of the inlet temperature.
• If the appliance is operated with preheated water and the inlet temperature exceeds the selected temperature, the inlet temperature is indicated on the second display line and flashes. The water is not heated further.
• You can store different set temperatures and call them up quickly. In the ECO function, the integral motorised valve limits the flow rate to 3 preset levels. The appliance has setting options for a temperature limit (Tmax function, user) and internal anti-scald-ing protection (qualified contractor). The backlight switches on automatically as soon as water starts to flow through the appli-ance or you make a change on the user interface. The backlight switches off automatically after water stops flowing or if no action is performed.
• Heating system
• The bare wire heating system is enclosed within a pressure-tested plastic jacket. The heating system with its stainless steel heater spiral is suitable for hard and soft water areas and is largely in-susceptible to scale build-up. The heating system ensures rapid and efficient DHW provision.
• Note
  The appliance is equipped with an air detector that large-ly prevents damage to the heating system. If, during operation, air is drawn into the appliance, the appliance shuts down heating output for one minute to protect the heating system.

Settings and displays

User interface

1. Selector
2. ON LED
3. Temperature memory keys
4. Backlit display
5. Main display | info display | parameter display
6. Segment display [10 – 100 %]
7. Second display line
8. “i” button to call up information and select menus

Display symbols
The symbols are shown on the display when activated.

1. Wellness showers
2. Automatic water volume control
3. ECO display
4. Tmax, displayed when temperature limit is enabled 5 Consumption indicator
5. Time
6. Operating lock [ON / OFF]
7. Spanner symbol, appears in the event of a fault

Selecting the set temperature

1. Set temperature settings: OFF, 20 – 60 °C
2. To call up/assign preferred temperatures

• Temperature limit via internal anti-scalding protection (qualified contractor)

  • If required, the qualified contractor can set a permanent temperature limit, for example in nurseries, hospitals, etc.
  • If the anti-scalding protection function is enabled and the temperature limit is reached, “Tmax” flashes.

• Temperature limit Tmax (user)

  • You can adjust the temperature limit individually. If the temperature limit is enabled, “Tmax” is shown on the display.

• Activating/deactivating the temperature limit Tmax

  • See chapter “Settings in the parameter menu”.

• Assigning temperature memory buttons
  Memory buttons “1” and “2” can each be assigned a preferred temperature.

  •  Select the preferred temperature.
  • To save the preferred temperature, press and hold button “1” or “2” for more than 3 seconds. The selected temperature flashes once to confirm.

• Inlet temperature information
  If the appliance is operated with preheated water and the inlet temperature exceeds the selected set temperature, the inlet temperature is indicated on the second display line and flashes. The water is not heated further.

Info menu
The appliance has an additional display where consumption values can be shown.

• Calling up the info menu
  • Briefly press “i” until “i 1” appears, then continue to press “i” to see further menus.
  • Exit the menu item by pressing “i” and holding for more than 5 seconds. Alternatively: The system exits the menu item automatically 30 seconds after the setting has been completed.

Note
The consumption values are calculated starting from the last reset.

Settings in the parameter menu

1. Activating the parameter menu
   • Briefly press and hold “i” for more than 5 seconds until “P 1” appears, then continue by briefly pressing “i”.
   • In the selected parameter menu, turn the temperature selector to the required display / setting.
2. Parameter menu

Cleaning, care and maintenance

• Deactivating the parameter menu
  Exit the menu item by pressing “i” and holding for more than 5 seconds. Alternatively: The system exits the menu item au-tomatically 30 seconds after the setting has been completed.

• Recommended settings

  • Your instantaneous water heater offers maximum precision and maximum convenience in DHW provision. Should you nonetheless operate the appliance with a thermostatic valve, we recommend that you:
  • 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 energy consumption:

  • 38 °C for hand washbasins, showers, bath
  • 55 °C for kitchen sinks

• Internal anti-scalding protection (qualified contractors)

  • If required, the qualified contractor can set a permanent temperature limit, for example in nurseries, hospitals, etc.
  • Recommended setting for operation with a thermostatic valve and water preheated by solar energy
  • S et the temperature at the instantaneous water heater 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 recommissioned by taking the follow-ing steps.

  • Disconnect the appliance from the power supply by removing the fuses/tripping the MCBs.
  • Open the tap for one minute until the appliance and its upstream cold water inlet line are free of air.
  • Switch on the power supply again.

•  Never use abrasive or corrosive cleaning agents. A damp cloth is sufficient for cleaning the appliance.

• Check the taps regularly. Limescale deposits at the tap out-lets can be removed using commercially available descaling agents.

 Troubleshooting

Note
Programming unit displays and selected settings are retained following a power failure.
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).

INSTALLATION

Safety
Only a qualified contractor should carry out installation, commis-sioning, maintenance and repair of the appliance.

1. General safety instruction
   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 temperatures may damage the appliance. You can limit the maximum inlet temperature by installing a central 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 V DC.

2. Shower operation

   • CAUTION Burns
   • The appliance is suitable for supplying a shower (shower operation). If the appliance is also or exclusively used for shower operation, the qualified con-tractor must adjust the temperature setting range to 43 °C using the internal anti-scalding protection on the appliance. When using preheated water, ensure that the inlet temperature does not exceed 55 °C.
   • In Australia, the use of a temperature controller is required to meet the requirements of AS 3498 when showers, bathtubs or washbasins are supplied with water. The maximum temperature of 50 °C must not be exceeded.

3. Instructions, standards and regulations

   • Note
     Observe all applicable national and regional regulations and instructions.

   • Note
     The installation of this appliance shall conform to the Plumbing Code of Australia (PCA), and the New Zealand Building Code.

   • 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 a linked 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.

Appliance description

1. Standard delivery
   The following are delivered with the appliance:

   • Wall mounting bracket
   • Installation template
   • 2 plugs
   • 2 extensions
   • 2 caps
   • 2 tees
   • 8 flat gaskets
   • Strainer
   • Plastic profile washer
   • Plastic connection pieces / installation aid
   • Cover and back panel guides
   • Jumper for internal anti-scalding protection

2. Accessories
   Wireless remote control – FFB 4 Set AP

Preparation

1. Installation site

   • Material losses
     Install the appliance in a room 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

Note
Mount the appliance on the wall. The wall must have sufficient load bearing capacity.
Minimum clearances

•  Maintain the minimum clearances to ensure trouble-free operation of the appliance and facilitate maintenance work.
• Water installation
  Flush the water line thoroughly.

Fittings

• Use appropriate pressure taps. Open vented taps are not permissible.

• 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 permissible pressure.

• Flow rate

  • Ensure that the flow rate for switching on the appliance is achieved.
  • If the required flow rate is not achieved when the draw-off valve is fully open, increase the water line pressure.
• • For further installation options, see chapter “Alternative installation methods”.

• Standard installation

• Note

  • 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 a ballpoint pen to do this.

• Opening the appliance

• 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.

  •  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

• Prepare the power cable.

• Fitting the wall mounting bracket

• 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.

Preparing the water connection

• Material losses
  Carry out all water connection and installation work in accordance with regulations.

• Remove the caps from the tees.

• Fit the plugs and the extensions with gaskets.

• Fit the strainer in the tee for the cold water inlet.

• Damage to the appliance and environment
  The strainer must be fitted for the appliance to function.

Installing the appliance

Note
If you are installing the appliance with flexible pipe connections, also secure the back panel with a screw.

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.
   • 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 lock-ing tabs engage.

• Screw the pre-assembled parts with flat gaskets to the cold water and DHW pipes of the appliance.
• F it the cold water inlet pipe and the DHW outlet pipe from the pipework with flat gaskets to the extensions from the appliance.

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 power supply.

• Connect the power cable to the mains terminal.

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 section from behind.
   • Click the lower back panel section into place.
   • Secure the lower back panel section with a screw.
   •   Material losses
     The cover plate of the lower back panel section must not bend when installed.

Commissioning

1. Preparation
   Internal anti-scalding protection via jumper slot

Jumper for anti-scalding protection setting

Install the “Anti-scalding protection setting” jumper in the required position on the top pin strip.

CAUTION Burns
If the appliance is supplied with preheated water, the internal anti-scalding protection may be exceeded.
Initial start-up

• Open and close all connected draw-off valves several times, until all air has been purged from the pipework and the appliance.

• Carry out a tightness check.

•  Activate the safety switch by firmly pressing the reset button (the appliance is delivered with the safety switch disabled).

• Connect the programming unit connecting cable to the PCB.

•   Note
  For undersink installation, the appliance cover should be turned the other way up for easier operation; see chapter “Installation alternatives / Rotated appliance cover”.

Fit the appliance cover

1. Pipe knock-out
2. Cover guides
3. Back panel guides
4. Fixing screw (not part of the standard delivery)
   Cleanly cut or break out the knock-out openings in the appliance cover. If necessary, use a file.

Material losses
If you cut open the wrong knock-out in the appliance cover by mistake, you must use a new appliance cover.

•  Note
  You can compensate for a slight connection pipe offset using the tabs on the cover guides. If the connection pipes are offset, do not fit any back panel guides.

• When installing connection pipes without offset, break off the tabs on the cover guide pieces.

• Click the cover guides into place in the openings.

• Position the back panel guides on the extensions. Push them together. Then push the guides against the back panel as far they will go.

• 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.

• Secure the appliance cover with the screw.

• Fit the fascia to the appliance cover.

• Remove the protective film from the user interface.

Appliance shutdown

Switch on the power supply.
Appliance handover

• Explain the appliance function to users and familiarise them with how it works.
• Make the user aware of potential dangers, especially the risk of scalding.
• Hand over the instructions.

Recommissioning

• Material losses
  To ensure that the bare wire heating system is not dam-aged following an interruption to the water supply, the appliance must be recommissioned by taking the follow-ing steps.

• Disconnect the appliance from the power supply by removing the fuses/tripping the MCBs.

• Open the tap for at least one minute until the appliance and its upstream cold water inlet line are free of air.

• Switch on the power supply again.

Appliance shutdown

• Isolate all poles of the appliance from the power supply.
• Drain the appliance (see chapter “Maintenance / Draining the appliance”).

Installation alternatives

Overview of installation alternatives

• Electrical connection IP rating
• On unfinished walls, connected from above IP 25
• On unfinished walls, connected from below, short power cable
• IP 25
• Finished walls IP 24
• Water connection IP rating
• Unfinished walls IP 25
• Other IP rating
• Installation with offset tiles IP 25
• Rotated 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.

Electrical connection from above on unfinished walls

Cable entry installation aid
Prepare the power cable.

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.
• Connect the power cable to the mains terminal.

WARNING Electrocution
The connecting wires must not protrude beyond the level of the mains terminal.

Electrical connection on unfinished walls from below with short power cable

• Reposition the mains terminal further downwards. To do this, undo the fixing screw. Secure the mains terminal in place.

Electrical connection on finished walls

• Note
  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 a ballpoint pen to do this.

Cable grommet

• 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.

• 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.

• Route the power cable through the cable grommet.

• Connect the power cable to the mains terminal.

Water installation on unfinished walls

Seal and screw in the twin nipples (not included in standard delivery).

1. Tee for cold water
2. Tee for domestic hot water
3. Cap

Fit the water connections.

• Fit the strainer and the plastic profile washer in the tee for the cold water inlet.

Material losses

• The strainer must be fitted for the appliance to function.
•  When replacing the appliance, check that the strainer is present.
• Screw the connection pipes from the appliance to the tee.
• Open the shut-off valve in the cold water inlet line.

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-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
  The cover plate of the lower back panel section must not bend when installed.

Installation alternatives

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

Rotated appliance cover
The appliance cover should be turned the other way up for undersink installation.

• Remove the programming unit from the appliance cover by pressing the locking hooks and removing the programming unit.

• Turn the appliance cover (not the appliance) the other way up and refit the programming unit. Push the programming unit home in parallel until all locking tabs engage. When engaging the locking  tabs, apply counter pressure by pushing against the appliance 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, user protection against contact with live components cannot be ensured.

  • Insert the connecting cable plug of the programming unit into the PCB (see chapter “Commissioning / Initial start-up”).
  • Hook the appliance cover in at the bottom. Pivot the appli-ance cover up to the back panel.
  •  Secure the appliance cover.
  • Fit the cover onto the appliance cover.

• Operation with preheated water
  You can limit the maximum inlet temperature by installing a central thermostatic valve.

Service information

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 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 “Installation alternatives”.

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 position.

1. Appliance cover with opening for condensate drain
2. Back panel with additional fixing screw
   • Drill a hole from the outside through the dismantled appliance 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.
   • 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.

Service information
Overview of connections

1. Motorised valve
2. Flow sensor
3. High limit safety cut-out, automatic reset 4 NTC sensor
4. Pin strip for anti-scalding protection
5. Programming unit plug-in position
6. Diagnostic traffic lights

Appliance cover retainer

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.

head/aerator
| | Appliance starting flow rate not reached; strainer in cold water inlet dirty| Clean strainer
| | Flow meter not plugged in| Check plug-in connection; correct if necessary
| | Flow meter faulty or dirty| Replace flow meter
| | PCB faulty| Replace the function module
Green flashing,

yellow on, red off

| No display| Loose connecting cable between PCB and programming unit| Check plug-in connections; correct if necessary
| | Faulty connecting cable between PCB and programming unit| Check connecting cable; replace if necessary
| | Programming unit faulty| Replace programming unit
| | PCB faulty| Replace the function module
Green flashing,

yellow on, red off

| No DHW; outlet temperature

does not match set value

| Tap faulty| Replace tap
| | Outlet sensor faulty| Replace outlet sensor
| | Heating system faulty| Replace the function module
| | PCB faulty| Replace the function module
Green flashes, yellow flashes, red off| No DHW; outlet temperature does not match set value| Motorised valve faulty| Replace motorised valve
Green flashing, yellow off, red on| No DHW; outlet temperature does not match set value| One or more power supply phases are missing| Check the fuses in the distribution board
| | Air detection has responded| Continue draw-off for >1 min

Fault code display
If there is an appliance fault, the spanner flashes on the display.
To call up the fault code display, press the “i” button for more than 5 seconds.

limit safety cut-out (plug-in connection, connecting cable); activate

safety switch

Safety switch responds again after high Replace high limit safety cut-out; activate safety switch and draw-off with limit safety cut-out has been checked;
| | | high limit safety cut-out faulty| maximum set value >1 min
| | | Safety switch responds again; PCB faulty| Replace the function module
Green flashing, yellow off, red on| Spanner flashes (fault code display E2 and spanner)| No DHW| PCB faulty (lead break or short circuit in inlet sensor)| Replace the function module
Green flashing, yellow off, red on| Spanner flashes (fault code display E3 and spanner)| No DHW| Short circuit in outlet sensor| Check outlet sensor; replace if necessary

 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.
• Close the shut-off valve in the cold water inlet line.
• Open all draw-off valves.
• Undo the pipe connections from the appliance.
• S tore the dismantled appliance free from the risk of frost, as water residues remaining inside the appliance can freeze and cause damage.
• Clean strainer
  If the strainer in the threaded cold water fitting is dirty, clean it. Close the shut-off valve in the cold water inlet line before removing, cleaning and refitting the strainer.

1. Strainer
2. Plastic profile washer
   • Remove the plastic profile washer and the strainer.
   •  Clean the components.
   •  Fit the strainer and the plastic profile washer.

Specification

1. Dimensions and connections

Alternative connection options

Wiring diagram
3/PE ~ 380-415 V

1. Power PCB with integral safety switch
2. Bare wire heating system
3. High limit safety cut-out
4. Mains terminal

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.

• Application areas / conversion table
  Electrical resistivity and electrical conductivity

• Pressure drop
  Fittings

Sizing the pipework
When calculating the size of the pipework, an appliance pressure drop of 0.1 MPa is recommended.
Fault conditions
In the event of a fault, loads up to 80 °C at a pressure of 1.0 MPa can occur very briefly in the installation.

Data table

17.7 Data table|
---|---
| | | | DHE 18 AU| | | DHE 27 AU
| | | | 202658| | | 202659
Electrical data| | | | | | |
Rated voltage| V| 380| 400| 415| 380| 400| 415
Rated output| kW| 16.2| 18| 19.4| 23.5| 26| 28
Rated current| A| 24.7| 26| 27| 35.6| 37.7| 38.9
Fuse protection| A| 25| 25| 32| | | 40
Frequency| Hz| 50/60| 50/60| 50/-| | | 50/-
Phases| | | | 3/PE| | | 3/PE
Max. mains impedance at 50 Hz| Ω| 0.331| 0.315| 0.304| 0.221| 0.210|
Resistivity ρ15 ≥| Ω cm| | | 900| | | 900
Conductivity σ15 ≤| μS/cm| | | 1111| | | 1111
Connections| | | | | | |
Water connection| | | | G 1/2 A| | | G 1/2 A
Application limits| | | | | | |
Max. permissible pressure| MPa| | | 1| | | 1
Max. inlet temperature for reheating| °C| | | 55| | | 55
Values| | | | | | |
Max. inlet temperature (e.g. pasteurisation)| °C| | | 70| | | 70
On| l/min| | | >2.5| | | >2.5
Flow rate at 28 K| l/min| | | 9.9 at 415 V| | | 14.3 at 415 V
Flow rate at 50 K| l/min| | | 5.6 at 415 V| | | 8.0 at 415 V
Pressure drop for flow rate at 50 K (without flow limiter)| MPa| | | 0.06| | | 0.14
Hydraulic data| | | | | | |
Nominal capacity| l| | | 0.4| | | 0.4
Versions| | | | | | |
Adjustable connected load| | | | –| | | –
Temperature settings| °C| | | Off, 20-60| | | Off, 20-60
Protection class| | | | 1| | | 1
Insulating block| | | | Plastic| | | Plastic
Heating system heat generator| | | | Bare wire| | | Bare wire
Cover and back panel| | | | Plastic| | | Plastic
Colour| | | | White| | | White
IP rating| | | | IP 25| | | IP 25
Dimensions| | | | | | |
Height| mm| | | 466| | | 466
Width| mm| | | 225| | | 225
Depth| mm| | | 116| | | 116
Weights| | | | | | |
Weight| kg| | | 3.2| | | 3.2

Note
The appliance conforms to IEC 61000-3-12.
Information on the appliance software

• Stiebel Eltron appliances may contain software of external suppliers (third party suppliers) which may be partly also be subject to an Open Source license. Some Open Source licenses are subject to the obligation to state the software, its authors as well as the licenses that apply to the software and to addition-ally provide the software as a source code or to offer to provide the source code. Stiebel
• Eltron therefore provides further infor-mation regarding third supplier software that it uses under the link https://www.stiebel-eltron.com/en/info/Licenses.html and also offers the source code there, if applicable. The software is provided only for compliance with the obligations under the Open Source licenses.

Environment and recycling

• Dispose of the appliances and materials after use in accordance with national regulations.
• If a crossed-out waste bin is pictured on the appliance, take the appliance to your local waste and recycling centre or nearest retail take-back point for reuse and recycling.
• This document is made of recyclable paper.
• Dispose of the document at the end of the appliance‘s life cycle in accordance with national regulations.

Who gives the warranty

1.  The warranty is given by Stiebel Eltron (Aust) Pty Ltd (A.B.N. 82  066 271 083) of 294 Salmon Street, Port Melbourne, Victoria, 3207 (“we”, “us” or “our”).
   The warranty

2. This warranty applies to the Stiebel Eltron Water Heaters – WaterMark Approved (the “unit”) listed within this operating and installation guide manufactured after 1 May 2015.

3. Subject to the warranty exclusions we will repair or replace, at our absolute discretion, a faulty component in your unit free of charge if it fails to operate in accordance with its specifications during the warranty period.

4. If we repair or replace a faulty component to your unit under this warranty, the warranty period is not extended from the time of the repair or replacement.

5. The warranty period commences on the date of completion of the installation of the unit. Where the date of completion of installation is not known, then the warranty period will commence 2 months after the date of manufacture.

6. The warranty period for a unit use for domestic purposes is shown in the table below. Domestic purposes means that the unit is used in a domestic dwelling.

installation of the unit.

• The warranty period for a unit used for commercial purposes is shown in the table below. Commercial purposes means that the unit is used for a non-domestic purpose and includes but not limited to being used in a motel, hotel, mining camp or nursing home.

installation of the unit.

Your entitlement to make a warranty claim
You are entitled to make a warranty claim if:

• you own the unit or if you have the owner’s consent to represent the owner of the unit;
• you contact us within a reasonable time of discovering the problem with the unit;
  How you make a warranty claim

9. To make a warranty claim you must provide us with the following information:

• The name, address and contact details (such as phone number and e-mail address) of the owner;
• The address where the unit is installed and the location (e.g. inlaundry);
• The serial number of the unit;
• The date of purchase of the unit and the name of the seller of the unit;
• The date of installation of the unit;
• A copy of the certificate of compliance when the unit was installed.

The contact details for you to make your warranty claim are:

• Name: Stiebel Eltron (Aust) Pty Ltd
• Address: 294 Salmon Street, Port Melbourne,
• Victoria, 3207
• Telephone: 1800 153 351
• (8.00 am to 5.00 pm AEST Monday to Friday)
• Contact person: Customer Service Representative
• E-mail: service@stiebel-eltron.com.au
• We will arrange a suitable time with you to inspect and test the1 unit.

Warranty exclusions

• We may reject your warranty claim if:

• The unit was not installed by registered and qualified tradespeople.

• The unit was not installed and commissioned:

  • in Australia;
  • in accordance with the Operating and Installation Guide; and
  • in accordance with the relevant statutory and local requirements of the State or Territory in which the unit is installed.

• The unit has not been operated or maintained in accordance with the Operating and Installation Guide.

• The unit does not bear its original Serial Number for Rating Label.

• The unit was damaged by any or any combination of the following:

  • normal fair wear and tear;
  • connection to an incorrect water supply;
  • connection to water from a bore, dam or swimming pool;
  • connection to an incorrect power supply;
  • connection to faulty equipment, such as damaged valves;
  • foreign matter in the water supply, such as sludge or sediment;
  • corrosive elements in the water supply;
  • accidental damage;
  • act of God, including damage by flood, storm, fire, lightning strike and the like;
  • excessive water pressure, negative water pressure (partial vacuum) or water pressure pulsation;
  • ingress of vermin.

• The unit was damaged before it was installed e.g. it was damaged in transit.

• An unauthorised person has modified, serviced, repaired or attempted to repair the unit without our consent.

• Non genuine parts other than those manufactured or approved by us have been used on the unit.
  We may charge you:

  • for any additional transport costs if the unit is installed more than 30 kilometres from our closest authorised service technician.
  • for the extra time it takes our authorised service technician to access the unit for inspection and testing if it is not sited in accordance with the Operating and Installation Guide and not readily accessible for inspection.
  • for any extra costs of our authorised service technician to make the unit safe for inspection.

• You must ensure that access to the unit by our authorised service technician is safe and free from obstruction.

• Our authorised service technician may refuse to inspect and test the unit until you provide safe and free access to it, at your cost.

• If we reject your warranty claim in accordance with clause 12, we may charge you for our authorised service technician’s labour costs to inspect and test the unit

• In order to properly test the unit we may remove it to another location for testing.

Australian Consumer Law

• Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
• The Stiebel Eltron warranty for the unit is in addition to any rights and remedies you may have under the Australian Consumer Law.

Comfort through Technology

• STIEBEL ELTRON International GmbH
• Dr.-Stiebel-Straße 33 | 37603 Holzminden | Germany
• info@stiebel-eltron.com
• www.stiebel-eltron.com

References

• STIEBEL ELTRON International

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