STIEBEL ELTRON DEM SET Mini Instantaneous Water Heater Installation Guide

STIEBEL ELTRON DEM SET Mini Instantaneous Water Heater

Specifications

• Brand: Stiebel Eltron
• Model: Not specified
• Year of Establishment: 2012
• Contact Information:
  • sales@ihdryers.co.uk
  • 0114 3540047
  • 7 Riverside Court, Don Road, Sheffield S9 2TJ

FAQs

• Q: How can I register my product?
  • A: To register your product, visit www.stiebel-eltron.com/registration and follow the instructions provided.
• Q: What safety measures should I consider during installation?
  • A: Ensure that you disconnect the product from the power source before installation to avoid any electrical hazards. Follow all national and regional regulations during installation.
• Q: Are special tools required for mounting the product?
  • A: Depending on the installation type, you may need tools such as a screwdriver for unlocking snap fasteners and screws for wall mounting.

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 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 55 °C. There is a risk of scalding at outlet temperatures over 43 °C.
• Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3 mm contact separation.
• The specified voltage must match the main power supply.
• The appliance must be permanently connected to fixed wiring; exception DEM 3.
• The appliance must be connected to the earth conductor.
• The power cable must only be replaced (for example if damaged) by a qualified contractor authorized by the manufacturer, using an original spare part.
• Secure the appliance as described in the chapter “Installation Installation”.
• Observe the maximum permissible pressure (see chapter “Installation Specification I Data table”).
• The specific water resistivity of the mains water supply must not be undershot (see chapter “Installation Specification I Data table”).
• Drain the appliance as described in the chapter “Installation Maintenance I Draining the Appliance”.

OPERATION

General information

The chapters “Special Information” and “Operation” are intended for appliance users and qualified contractors. The chapter “Installation” is intended for qualified contractors.

Safety instructions 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.

Symbols, type of risk

Signal words

Other symbols in this documentation

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 stated otherwise.

Safety

Intended use

• This appliance is suitable for heating domestic hot water or for reheating preheated water. The appliance is designed for one hand wash basin.
• 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 the instructions for any accessories used is also part of the correct use of this appliance.

General safety instructions

Appliance description

Test mark

• See the type plate on the appliance.

Appliance description

• The electronically controlled mini instantaneous water heater maintains a constant outlet temperature up to its output limit, irrespective of the inlet temperature.
• This appliance has been set at the factory to the outlet temperature required for washing hands. Once this temperature has been reached, the PCB automatically reduces the output. The output is matched to the required temperature, this prevents the temperature being exceeded.
• The appliance heats the water directly at the draw-off point as soon as the tap is opened. The short pipe runs ensure that energy and water losses are minimal.
• The DHW output depends on the cold water temperature, the heating output, and the flow rate.
• The bare wire heating system is suitable for hard and soft water areas. This heating system has a low susceptibility to scale buildup. The heating system ensures quick and efficient DHW provision at the hand wash basin.
• Your qualified contractor can adjust the maximum temperature and flow rate (see chapter “Installation I Commissioning Settings”).
• Fitting the special aerator supplied provides an optimum waterjet.

Settings

• The appliance heating system switches on automatically as soon as you open the DHW valve at the tap or activate the sensor of a sensor tap. The water is heated. The water temperature can be adjusted at the tap.
• For the starting flow rate and flow rate limit, see the chapter “Installation I Specification Data table*.

Increasing the temperature

• Reduce the flow rate at the tap.

Reducing the temperature

• Open the tap further. Add more cold water.
• Following an interruption of the water supply See chapter “Installation Commissioning I Recommissioning”.

Cleaning, care, and maintenance

• Never use abrasive or corrosive cleaning agents. A damp 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.
• Have the electrical safety of the appliance regularly checked by a qualified contractor?
• Regularly descale or replace the special aerator in the tap (see chapter “Installation Appliance description Accessories”).

Troubleshooting

If you cannot remedy the fault, contact your qualified contractor. To facilitate and speed up your inquiry, please provide the serial number from the type plate (000000-0000-000000).

INSTALLATION

Safety

• Only a qualified contractor should carry out installation, commissioning, maintenance, and repair of the appliance.

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 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 > 34 V DC.

Instructions, standards, and regulations

Note Observe all applicable national and regional regulations and instructions. The electrical resistivity of the water must not fall below that stated on the type plate. In a linked water network, factor in the lowest electrical resistivity of the water (see chapter “Installation Specification Data table”). Your water supply utility will advise you of the electrical resistivity or conductivity of the water in your area.

Appliance description

Standard delivery

The following are delivered with the appliance:

• Strainer in cold water inlet
• Special aerator
• Connection hose 3/8, 500 mm long, with gaskets*
• Tee 3/8*
• Company logo for oversink installation for the connection as pressure-tested appliance

INSTALLATION Preparation

Accessories Special aerator

Note Fitting the special aerator supplied provides an optimum water jet.

Non-pressurised taps

• WSN 10 IWSN 20 – sensor tap for washbasins
• MAW – wall mounted tap for oversink installation
• MAZ – twin lever washbasin tap
• MAE-W – mono lever washbasin tap

Pressure-tested tap

• WSH 10 IWSH 20 – sensor tap for washbasins

Preparation

• Flush the water line thoroughly.

Water installation

• No safety valve is required.

Taps

• Use suitable taps (see chapter “Installation Appliance Description I Accessories”).

Installation site

• Install the appliance in a room free from the risk of frost and near the draw-off tap.
• Ensure that the lateral fixing screws for the cover are always accessible.
• The appliance is suitable for undersink installation (water connections at the top) and oversink installation (water connections at the bottom).

DANGER Electrocution: The adjusting screw for setting the flow rate is life. Protection rating IP 25 is only ensured if the appliance back panel is fitted. Always fit the appliance’s back panel.

Installation alternatives Undersink installation Non-pressurised, with non- pressurized tap

Pressure-tested, with pressure-tested tap

Appliance installation

Note: The wall must have sufficient load-bearing capacity.

• Mount the appliance on the wall.
• Undo the cover fixing screws by two turns.
• Undo the snap fastener using a screwdriver.
• Remove the appliance cover with the heater towards the front.
• Using pliers, break out the knock-out for the power cable in the appliance cover. Correct the contours with a file if necessary.
• Use the appliance back panel as a drilling template.
• Secure the appliance back panel to the wall with suitable rawl plugs and screws.
• Route the power cable through the knock-out in the back panel.
• Hook in the appliance cover with the heater at the bottom.
• Click the heater into place using the snap fastener.
• Secure the appliance cover with the cover fixing screws.

Tap installation

• Property damage
  • When making the connections, counter-hold the torque on the appliance using a size 14 spanner.
  • Install the tap. For this, also observe the tap operating and installation instructions.
• Pressure-tested tap
  • Note: Fit the 3/8 connection hose and the 3/8 tee provided.
• Oversink installation, non-pressurized, with non-pressurized tap

Tap installation Property damage

• When making the connections, counterhold the torque on the appliance using a size 14 spanner.
• Install the tap. For this, also observe the tap operating and installation instructions.

Appliance installation

• Fit the appliance to the tap with the water connections.

Commissioning
Making the electrical connection

• DANGER Electrocution
  • Carry out all electrical connection and installation work under relevant regulations.
• DANGER Electrocution
  • Ensure that the appliance is connected to the earth conductor.
  • Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3 mm contact separation.
• DANGER Electrocution
  • The appliances are delivered with a power cable (DEM 3 with plug).
  • Connection to a permanent power supply is possible, provided the fixed cable has a cross-section that is at least equal to that of the standard power cable of the appliance. The maximum permissible cross-section is 3×6 mm 2.
  • If the appliance is installed over the sink, route the power cable behind the appliance.
• Property damage
  • When making the connection to a standard safety socket (in the case of a power cable with plug), ensure that the socket is freely accessible after the appliance has been installed.
• Property damage
  • Observe the type plate. The specified voltage must match the mains power supply.
  • Connect the power cable as shown in the wiring diagram (see chapter “Installation Specification Wiring diagram”).

Commissioning Initial start-up

• Fill the appliance for at least one minute by running the tap several times until the pipework and appliance are free of air.
• Carry out a tightness check.
• Insert the power cable plug, if present, into the standard safety socket or set the fuse MCB.
• Check the appliance function.
• In the case of oversink installation, affix the company logo supplied over the existing company logo.

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 these instructions.

Recommissioning

• 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.
  • Isolate the appliance from the power supply across all poles. Pull the power cable plug, if present, from the socket, or remove the fuse and reset the MCB.
  • Open and close the tap multiple times for at least one minute until the appliance and the upstream cold water supply line are free of air.
  • Switch the mains power supply back on again.

Settings

• You can alter the maximum flow rate and temperature.

DANGER Electrocution

• The flow rate and temperature may only be adjusted if the appliance is isolated from the power supply.
• Isolate all poles of the appliance from the power supply.

DANGER Electrocution

• The adjusting screw for changing the flow rate and the potentiometer for setting the temperature are live if the appliance has not been isolated from the power supply.
• Remove the appliance cover.

Setting the maximum temperature

• Factory setting: 38 °C
• Using a screwdriver, set the potentiometer to the maximum required temperature.
• Fit the appliance cover.

Shutting down the system and Limiting the flow rate

• Factory setting: Maximum flow rate
• Using the adjusting screw, set the maximum required flow rate:
  • Lowest flow rate = wind the screw in as far as it will go.
  • Maximum flow rate = wind the screw out as far as it will go.
• Fit the appliance cover.

Shutting down the system

• Isolate the appliance from the mains power supply using the fuse MCB in the distribution board or by pulling the power cable plug from the socket.
• Drain the appliance (see chapter “Installation Maintenance”).

Troubleshooting

LED indicators

1. Light  up red in the case of a fault
2. Indicator yellow in heating mode I flashing when the output limit is exceeded
3. Flashes green if the PCB is receiving power

Activating the safety pressure limiter

1. 1-pole safety pressure limiter DEM 4 / DEM 6
2. 2-pole safety pressure limiter DEM 3 / DEM 7

Maintenance

DANGER Electrocution: Before any work on the appliance, disconnect all poles from the power supply.

Draining the appliance

DANGER Scalding: Hot water may escape when you drain the appliance.

If the appliance needs to be drained for maintenance or protect the whole installation when there is a risk of frost, proceed as follows:

• Close the shut-off valve in the cold water inlet line.
• Open the draw-off valve.
• Undo the water connections on the appliance.

Clean the strainer
You can clean the fitted strainer after removing the cold water supply line.

Specification

Tests by VDE 0701/0702 Earth conductor check

• Check the earth conductor (in Germany e.g. DGUV A3) on the earth conductor contact of the power cable and the appliance connector.

Insulation resistance

• Due to the electronic control of this appliance, an insulation resistance test to VDE 0701/0702 cannot be carried out.
• To check the effectiveness of the insulating properties of the appliance, we recommend conducting a residual current test of the earth conductor current leakage current to VDE 0701/0702 (Fig. C.3b).

Appliance storage

• Store the dismantled appliance free from the risk of frost, as water residues remaining inside the appliance can freeze and cause damage.

Replacing the power cable for the DEM 6

• If replacing the cable for the DEM 6, use a power cable with 4 mm 2 cross-section.

Dimensions and connections

Wiring diagram

DEM 3 1/N/PE – 200-240 V

1. Safety pressure limiter
2. Pressure differential switch
3. PCB with outlet temperature sensor

DEM 4 and DEM 6 1/N/PE – 200-240 V

1. Safety pressure limiter
2. Pressure differential switch
3. PCB with outlet temperature sensor

Property damage

• In the case of a permanent power supply, connect the power cable according to the designations on the socket terminals.

DEM 7 2/PE – 380-400 V

1. Safety pressure limiter
2. Pressure differential switch
3. PCB with outlet temperature sensor

Temperature increase
At 230 V / 400 V, the following water temperature increases occur:

• X Flow rate in l/min
• Y Temperature increase in K
• 1 3.5 kW – 230 V
• 2 4.4 kW – 230 V
• 3 5.7 kW – 230 V
• 4 6.5 kW – 400 V

Application areas
For electrical resistivity and electrical conductivity, see the “Installation Specification Data table”

Energy consumption data
Product datasheet: Conventional water heaters to regulation (ED) no. 812/2013 I 814/2013 / (S.l. 2019 No. 539 / Programme 2)

Data table

Note: The appliance conforms to I EC 61000-3-12.

Guarantee

• The guarantee conditions of our German companies do not apply to appliances acquired outside of Germany. In countries where our subsidiaries sell our products, a guarantee can only be issued by those subsidiaries.
• Such a guarantee is only granted if the subsidiary has issued its terms of the guarantee. No other guarantee will be granted.
• We shall not provide any guarantee for appliances acquired in countries where we have no subsidiary to sell our products. This will not affect warranties issued by any importers.

Environment and recycling

• Dispose of the appliances and materials after use per national regulations.
• If a crossed-out waste bin is pictured on the appTT appliance, take the appliance to your local waste and recycling center 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 following national PAP regulations.

References

• Sachverständigenbüro ELTRON - Startseite
• STIEBEL ELTRON International

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