Operation and Installation

Special Information

Safety for Children and Vulnerable Persons: The appliance may be used by children aged 3 and older and persons with reduced physical, sensory, or mental capabilities, or lack of experience and know-how, provided they are supervised or have been instructed on safe use and potential risks. Children must not play with the appliance. Cleaning and maintenance by users must be done under supervision.

Preheated Water: If using preheated water, tap temperatures can reach up to 70 °C. There is a risk of scalding at outlet temperatures exceeding 43 °C. Ensure inlet temperature does not exceed 55 °C when using preheated water.

Shower Operation: For shower-only operation, the qualified contractor must set the temperature range to 43 °C using the internal anti-scalding protection.

Australian Requirements: In Australia, a temperature controller is required for showers, bathtubs, and washbasins to meet AS 3498 standards, with a maximum temperature of 50 °C.

Operation

1. General Information

This manual is intended for users and qualified contractors. The installation chapter is for qualified contractors only.

Safety Precautions:

• Ensure the appliance is separated from the power supply by an isolator with at least 3 mm contact separation for all poles.
• 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 the "Installation / Installation" chapter.
• Observe the maximum permissible pressure (see "Installation / Specification / Data table").
• The specific electrical resistance of the mains water supply must not be below the specified value (see "Installation / Specification / Data table").
• Drain the appliance as described in "Installation / Maintenance / Draining the appliance".

Symbols and Keywords

Symbols:

• ! Type of Risk: Injury, Electrocution, Burns (scalding).
• ℹ️ Note: General information. Read carefully.
• ➡️ Action: Indicates a step-by-step procedure.
• ! Material Losses: Appliance damage, consequential losses, environmental pollution.
• ? Appliance Disposal: Information on proper disposal.

Keywords:

• DANGER: Failure to observe results in serious injury or death.
• WARNING: Failure to observe results in serious injury or death.
• CAUTION: Failure to observe results in minor injury.

1.3 Units of Measurement

All measurements are given in mm unless stated otherwise.

2. Safety

2.1 Intended Use: Suitable for heating domestic hot water or reheating preheated water, supplying one or more draw-off points. Not intended for use if inlet temperature for reheating is exceeded. Suitable for domestic use and safe for untrained persons, also usable in non-domestic environments.

3. Appliance Description

The appliance switches on automatically when a hot water valve is opened and off when closed. It heats water as it flows, with adjustable temperature. The control unit selects heating output based on flow rate, selected temperature, and cold water temperature. It maintains a consistent outlet temperature regardless of inlet temperature, up to its maximum output. If operated with preheated water and inlet temperature exceeds set temperature, water is not heated further.

Heating System: Features a bare wire heating system enclosed in a pressure-tested plastic jacket with a stainless steel internal indirect coil, resistant to scale build-up. An air detector prevents damage by shutting down the appliance for one minute if air is drawn in.

4. Settings and Displays

4.1 Selecting the Set Temperature: Use the temperature selector (OFF, 20-60 °C). The display shows the temperature. Units can be switched between °C and °F.

4.2 Recommended Settings:

• For thermostatic valve operation: Set appliance temperature above 50 °C, then set the thermostatic valve.
• Saving Energy: 38 °C for hand washbasins/showers/baths, 55 °C for kitchen sinks.
• Temperature Limit: A qualified contractor can set a permanent limit to prevent scalding.

Following an Interruption to the Water Supply: To prevent damage to the heating system, disconnect power, open a tap for one minute to purge air, then switch power back on.

5. Cleaning, Care and Maintenance

Use a damp cloth; avoid abrasive or corrosive cleaners. Regularly check taps and descale outlets if necessary.

6. Troubleshooting

Note: Programming unit displays and settings are retained after power failure.

If faults persist, contact a qualified contractor and provide the type plate number.

Installation

7. Safety

Installation, commissioning, maintenance, and repair must only be carried out by a qualified contractor.

7.1 General Safety Instructions: Use only original accessories and spare parts. Observe maximum inlet temperature to prevent appliance damage. WARNING Electrocution: The appliance contains capacitors that discharge voltage exceeding 60 V DC when disconnected from power.

7.2 Shower Operation: Suitable for showers. For shower-only use, the contractor must set the anti-scalding protection to 43 °C. In Australia, a temperature controller is required, limiting temperature to 50 °C.

7.3 Instructions, Standards and Regulations: Observe all applicable national and regional regulations. Installation must conform to the Plumbing Code of Australia (PCA) and the New Zealand Building Code. IP 24/IP 25 rating requires a correctly fitted cable grommet.

Electrical Resistance: The specific electrical resistance of the water must not fall below the type plate value. Consult your water supply utility for specific resistance or conductivity.

8. Appliance Description

8.1 Standard Delivery: Includes wall mounting bracket, installation template, plugs, extensions, caps, tees, flat gaskets, strainer, plastic profile washer, connection pieces, cap/back panel guides, and anti-scalding jumper.

8.2 Accessories: Wireless remote control FFB 4 Set AP.

9. Preparation

9.1 Installation Location: Install in a frost-free room. Always install vertically near the draw-off point. Horizontal installation is described in alternative methods. Suitable for undersink and oversink installation.

Diagram: Undersink installation showing cold water inlet (1) and DHW outlet (2).

Diagram: Oversink installation showing cold water inlet (1) and DHW outlet (2).

Note: Mount on a wall with sufficient load-bearing capacity.

9.2 Minimum Clearances: Maintain minimum clearances for trouble-free operation and maintenance.

9.3 Water Installation: Flush water lines thoroughly. Use appropriate pressure taps; open vented taps are not permissible. Permissible materials for cold water inlet and DHW outlet lines include galvanized steel, stainless steel, copper, or plastic pipes.

Material Losses: If using plastic pipework, consider maximum inlet temperature and pressure.

10. Installation

Flow Rate: Ensure the flow rate for switching on is achieved. Increase water line pressure if needed. Remove flow limiter if flow rate is still insufficient.

10.1 Standard Installation:

Opening the Appliance: Pull the fascia forward, undo the screw, and pivot open the cover. Remove the back panel by pressing locking tabs.

Diagram: Shows steps for opening the appliance cover and removing the back panel.

Preparing the Power Cable: Details for connecting from below on unfinished walls.

Fitting the Wall Mounting Bracket: Mark holes using the template, drill, secure bracket, and fit it.

Diagram: Shows fitting the wall mounting bracket.

Preparing the Water Connection: Seal and screw in twin connectors. Fit strainer and plastic profile washer in the cold water inlet tee.

Material Losses: The strainer must be fitted for the appliance to function. Check its presence when replacing the appliance.

Removing the Flow Limiter: Do not remove if using a thermostatic valve. Remove the function module from the back panel if flow rate is too low.

Diagram: Shows steps for removing the flow limiter module.

Diagram: Shows fitting strainer and plastic profile washer.

Diagram: Shows water connection parts.

Diagram: Shows steps for removing the flow limiter module.

Diagram: Shows steps for preparing the power cable.

Diagram: Shows fitting the wall mounting bracket.

Diagram: Shows water connection preparation.

Diagram: Shows removing the flow limiter.

11. Commissioning

11.1 Preparation: Install the anti-scalding protection setting jumper in the required position on the upper pin strip. Factory setting is 60 °C; limit to 43 °C if needed.

CAUTION Burns: If using preheated water, the internal anti-scalding protection may be exceeded. Use a central thermostatic valve.

11.2 Initial Start-up: Open and close draw-off valves to purge air. Perform a tightness check. Activate the safety switch by pressing the reset button. Connect the programming unit cable.

Diagram: Shows jumper slot for anti-scalding protection.

Diagram: Shows initial start-up steps (timer, reset button, programming unit connection).

11.2.1 Appliance Handover:

Explain appliance function and risks (scalding) to users. Hand over instructions.

11.3 Recommissioning:

Material Losses: To restart after water supply interruption: disconnect power, open tap for one minute to purge air, switch power back on.

12. Appliance Shutdown:

Isolate all poles from the power supply. Drain the appliance.

13. Alternative Installation Methods

Overview: Details IP ratings for various electrical and water connection types (e.g., unfinished walls, finished walls, offset tiles, horizontal installation).

13.1 Electrical Connection from Above on Unfinished Walls: Instructions for repositioning the mains terminal and routing the cable.

Diagram: Shows electrical connection from above.

13.2 Electrical Connection on Unfinished Walls with Short Power Cable: Instructions for repositioning the mains terminal.

Diagram: Shows electrical connection with short power cable.

13.3 Electrical Connection on Finished Walls: Instructions for preparing the power cable and fitting the cable grommet. Note: This changes the IP rating; amend the type plate accordingly (e.g., from IP 25 to IP 24).

Diagram: Shows electrical connection on finished walls.

13.4 Water Installation on Unfinished Walls: Seal and screw in twin connectors. Fit strainer and plastic profile washer.

Diagram: Shows water installation steps.

Material Losses: Strainer must be fitted. Check its presence when replacing.

13.5 Wall Mounting Bracket When Replacing Appliance: Existing STIEBEL ELTRON brackets can be used if the fixing screw is in the lower right position. Specific instructions for replacing a DHF model.

Diagram: Shows replacing the wall mounting bracket.

13.6 Installation with Offset Tiles: Adjust wall clearance and lock the back panel.

Diagram: Shows installation with offset tiles.

13.7 Pivoting Appliance Cover: For undersink installation, the cover can be turned around. Instructions for removing and refitting the programming unit and cover.

WARNING Electrocution: Ensure all locking tabs on the programming unit click into place for proper protection.

Diagram: Shows pivoting appliance cover steps.

13.8 Operation with Preheated Water: Restrict maximum inlet temperature with a central thermostatic valve.

13.9 Horizontal Installation: Note: Only direct wall mounting is permitted. Installation versions with offset tiles or rotated cover are not allowed. IP rating changes; amend type plate. Appliance can be mounted horizontally (90° left, water connections on right). Preparation includes drilling a condensate drain opening (Ø 5.0-6.0 mm) in the appliance cover.

Diagram: Shows horizontal installation water connections.

Diagram: Shows preparation for horizontal installation (condensate drain opening).

Service Information

14. Service Information

Overview of Connections: Lists components like flow sensor, high limit safety cut-out, NTC sensor, anti-scalding protection pin strip, programming unit plug-in, and diagnostic traffic light.

Diagram: Shows overview of connections and appliance cover retainer.

15. Troubleshooting

WARNING Electrocution: Appliance must be connected to power supply for testing.

Note: Water must be flowing when testing with diagnostic traffic lights.

Indicator Options for Diagnostic Traffic Light (LED):

• Red: Illuminates in event of a fault.
• Yellow: Illuminates in heating mode / flashes when output restriction reached.
• Green: Flashing indicates appliance connected to power supply.

Maintenance

16. Maintenance

WARNING Electrocution: Disconnect all poles from the power supply before any work. The appliance contains capacitors that discharge voltage exceeding 60 V DC.

Draining the Appliance: Close cold water shut-off valve, open all draw-off valves, undo pipe connections. Store in a frost-free room.

WARNING Burns: Hot water may escape during draining.

Cleaning the Strainer: Close cold water shut-off valve. Remove plastic profile washer, then the strainer. Clean components and refit.

Diagram: Shows strainer cleaning steps.

Specification

17.1 Dimensions and Connections

Diagram: Shows dimensions and connection points (electrical cables, cold water inlet, DHW outlet).

Connections: Cold water inlet: G 1/2 A Male thread. DHW outlet: G 1/2 A Male thread.

17.2 Wiring Diagram

Diagram: Shows wiring diagram for 3/PE ~ 380-415 V, including Power PCB, heating system, high limit safety cut-out, and mains terminal.

17.3 Domestic Hot Water Output:

DHW output depends on connected power supply, appliance load, and cold water inlet temperature. Tables provide output in l/min for various voltages, loads, and inlet temperatures (38 °C and 50 °C).

17.4 Application Areas / Conversion Table:

Provides specific electrical resistance and conductivity values for water at different temperatures.

17.5 Pressure Drop:

Details tap pressure drop and recommended pipework sizing.

17.6 Fault Conditions:

Notes potential high temperatures and pressures during faults.

17.7 Data Table:

Comprehensive table listing electrical data, versions, heating system, connections, application limits, flow rates, pressure drops, dimensions, and weights for all models.

Environment and Recycling

Dispose of materials in accordance with national regulations to protect the environment.

Warranty

Who Gives the Warranty:

Stiebel Eltron (Aust) Pty Ltd, 294 Salmon Street, Port Melbourne, Victoria, 3207.

The Warranty:

Applies to units manufactured after May 1, 2015. Stiebel Eltron will repair or replace faulty components free of charge if they fail to operate within specifications during the warranty period. Warranty period commences on installation completion date, or 2 months after manufacture if unknown.

Warranty Periods:

• Domestic Use: 5 years for all components.
• Commercial Use: 1 year for all components.

Your Entitlement to Make a Warranty Claim:

You are entitled to claim if you own the unit (or have owner's consent), and contact Stiebel Eltron within a reasonable time of discovering a problem.

How to Make a Warranty Claim:

Provide model number, description of the problem, owner's name/address/contact details, installation address, serial number, purchase date/seller, installation date, and certificate of compliance.

Contact Details for Warranty Claims:

Name: Stiebel Eltron (Aust) Pty Ltd
Address: 294 Salmon Street, Port Melbourne, Victoria, 3207
Telephone: 1800 153 351 (8:00 am - 5:00 pm AEST, Mon-Fri)
Contact Person: Customer Service Representative
E-mail: service@stiebel-eltron.com.au

Stiebel Eltron will arrange a time to inspect and test the unit.

Warranty Exclusions:

Claims may be rejected if the unit was not installed by qualified tradespeople, not installed/commissioned according to the guide and local requirements, not operated/maintained correctly, has a missing serial number, was damaged (wear and tear, incorrect supply, foreign matter, accidental damage, acts of God, pressure issues, vermin, transit damage), modified by unauthorized persons, or used non-genuine parts.

Charges:

Stiebel Eltron may charge for additional transport costs (over 30km from technician), extra time for access, or making the unit safe for inspection.

Access: Ensure safe and unobstructed access for technicians.

Australian Consumer Law:

The Stiebel Eltron warranty is in addition to consumer guarantees under the Australian Consumer Law, which provides rights for major failures or goods not of acceptable quality.