DEM - Boiler STIEBEL ELTRON - Free user manual and instructions

USER MANUAL DEM STIEBEL ELTRON

www.stiebel-eltron.com/registration

BESONDEREHINWEISE

www.stiebel-eltron.com/registration

INSTALLATION

Sicherheit

INSTALLATION

8. Sicherheit

X Volumenstrom in l/min

Y Temperaturerhöhung in K

1 3.5kW - 230V
2 4.4 kW - 230 V
3 5,7 kW - 230 V
4 6,5kW - 400V

1. General information 33
2. Safety 34
3. Appliance description 35
4. Settings 36
5. Cleaning, care and maintenance 36
6. Troubleshooting 36

INSTALLATION

1. Safety 37
2. Appliance description 37
   9.Preparation 38
3. Installation 38
4. Commissioning 42
5. Shutting down the system 45
6. Troubleshooting 45
7. Maintenance 47
8. Specification 48

GUARANTEE

ENVIRONMENT AND RECYCLING

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.
• During operation, the tap can reach temperatures up to 55^ . There is a risk of scalding at outlet temperatures in excess of 43^ .
• Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3mm contact separation.

SPECIAL INFORMATION

• The specified voltage must match the mains 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 authorised by the manufacturer, using an original spare part.
• 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

OPERATION

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.

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.

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	Type of risk
	Injury
	Electrocution
	Burns (burns, scalding)

1.1.3 Signal words

SIGNAL WORD	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.

OPERATION

Safety

1.2 Other symbols in this documentation

Note

General information is identified by the adjacent symbol. Read these texts carefully.

Symbol Meaning

Property damage

(appliance damage, consequential losses and environmen-tal 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

Note

All measurements are given in mm unless stated otherwise.

2. Safety

2.1 Intended use

This appliance is suitable for heating domestic hot water or for reheating preheated water. The appliance is designed for one hand washbasin.

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.

2.2 General safety instructions

DANGER Burns

During operation, the tap can reach temperatures up to 55^

There is a risk of scalding at outlet temperatures in excess of 43^

OPERATION

Appliance description

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.

DANGER Electrocution

Any damaged power cables must be replaced by a qualified electrician. This prevents potential hazards from arising.

Property damage

Protect the appliance and the tap against frost.

Property damage

Only use the special aerator provided. Prevent scale build-up at the tap outlets (see chapter "Operation / Cleaning, care and maintenance").

2.3 Test mark

See type plate on the appliance.

3. 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 build-up. The heating system ensures quick and efficient DHW provision at the hand washbasin.

Your qualified contractor can adjust the maximum temperature and flow rate (see chapter "Installation / Commissioning / Settings").

Fitting the special aerator supplied provides an optimum water jet.

OPERATION

Settings

4. 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 chapter "Installation / 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 / Recommissioning".

5. 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").

6. Troubleshooting

Problem	Cause	Remedy
The appliance will not start despite the DHW valve being fully open.	No voltage at the appli- ance.	Check the fuse/MCB in your fuse box/distribu-tion board.
	The aerator in the tap is scaled up or dirty.	Clean and/or descale the aerator or replace the special aerator.
	The water supply has been interrupted.	Vent the appliance and the cold water supply line (see chapter "Instal-lation / Commissioning /Recommissioning").
The preferred tempera-ture is not being reached.	The maximum tempera-ture set inside the appli- ance is too low.	Have your qualified con-tractor adjust the maxi-mum temperature.
	The appliance has reached its output limit.	Reduce the flow rate.

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

INSTALLATION

7. Safety

Only a qualified 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 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 >34VDC

7.2 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.

8. Appliance description

8.1 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

8.2 Accessories

Special aerator

Note

Fitting the special aerator supplied provides an optimum water jet.

Non-pressurised taps

• WSN 10 / WSN 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 / WSH 20 - sensor tap for washbasins

9. Preparation

Flush the water line thoroughly.

Water installation

No safety valve is required.

Taps

• Use suitable taps (see chapter "Installation / Appliance description / Accessories").

10. Installation

10.1 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 live. Protection rating IP 25 is only ensured if the appliance back panel is fitted.

Always fit the appliance back panel.

INSTALLATION

Installation

10.2 Installation alternatives

10.2.1 Undersink installation

Non-pressurised, with non-pressurised tap

Pressure-tested, with pressure-tested tap

26.02.05.0093

INSTALLATION

Installation

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.

INSTALLATION

Installation

• 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, counterclock 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.

10.2.2 Oversink installation, non-pressurised, with non-pressurised tap

Tap installation

Property damage

When making the connections, counterclock 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.

INSTALLATION

Commissioning

10.3 Making the electrical connection

DANGER Electrocution

Carry out all electrical connection and installation work in accordance with 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").

11. Commissioning

11.1 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.

INSTALLATION

Commissioning

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.

11.2 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.

11.3 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/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.

11.4 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.

INSTALLATION

Commissioning

Remove the appliance cover.

Setting the maximum temperature

Factory setting: 38^

Using a screwdriver, set the potentiometer to the maximum required temperature.
Fit the appliance cover.

INSTALLATION

Shutting down the system

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.

12. Shutting down the system

Isolate the appliance from the mains power supply by means of the fuse/MCB in the distribution board or by pulling the power cable plug from the socket.
Drain the appliance (see chapter "Installation / Maintenance").

13. Troubleshooting

Problem	Cause	Remedy
The appliance will not start despite the DHW valve being fully open.	The aerator in the tap is scaled up or dirty.	Clean and/or descale the aerator or replace the special aerator.
	The flow rate is set too low.	Increase the flow rate.
	The strainer in the cold water line is blocked.	Clean the strainer after shutting off the cold water supply line.
	The heating system is faulty.	Check the resistance of the heating system and replace the appliance if required.
	The safety pressure limit-er has responded.	Remedy the cause of the fault. Isolate the appliance from the power supply and depressurise the water line. Activate the safety pressure limiter.
The preferred tempera-ture is not being reached. The yellow indicator flashes.	The appliance has reached its output limit.	Reduce the flow rate.

INSTALLATION

Troubleshooting

LED indicators

1 Lights up red in the case of a fault
2 Indicator yellow in heating mode / 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

INSTALLATION

Maintenance

14. Maintenance

DANGER Electrocution

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

14.1 Draining the appliance

DANGER Scalding

Hot water may escape when you drain the appliance.

If the appliance needs to be drained for maintenance or to 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.

14.2 Clean the strainer

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

26.02.05.0065

INSTALLATION

Specification

14.3 Tests in accordance with 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 on 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).

14.4 Appliance storage

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

14.5 Replacing the power cable for the DEM 6

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

15. Specification

15.1 Dimensions and connections

			DEM
b02	Entry electrical cables I
b03	Entry electrical cables II
c01	Cold water inlet	Male thread	G 3/8 A
c06	DHW outlet	Male thread	G 3/8 A

INSTALLATION

Specification

15.2 Wiring diagram

15.2.1 DEM 3

1/N/PE ~ 200-240 V

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

15.2.2 DEM 4 and DEM 6

1/N/PE 200 - 240V

85.02.05.0001

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.

INSTALLATION

Specification

15.2.3 DEM 7

2/PE 380 - 400V

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

15.3 Temperature increase

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

X Flow rate in l/min

Y Temperature increase in K

1 3.5kW - 230V
2 4.4kW - 230V
3 5.7kW - 230V
4 6.5kW - 400V

Example DEM 3 with 3.5kW

Flow rate	l/min	2.0
Temperature increase	K	25
Cold water inlet temperature	°C	12
Maximum possible outlet temperature	°C	37

INSTALLATION

Specification

15.4 Application areas

Electrical resistivity and electrical conductivity, see "Installation / Specification / Data table"

Standard specifica- tion at 15 °C			20 °C			25 °C
Resis- tivity ρ ≥	Conductivity σ ≤		Resis- tivity ρ ≥	Conductivity σ ≤		Resis- tivity ρ ≥	Conductivity σ ≤
	mS/m	μS/cm	Ω cm	mS/m	μS/cm	Ω cm	mS/m	μS/cm
1000	100	1000	890	112	1124	815	123	1227
1300	77	769	1175	85	851	1072	93	933

15.5 Energy consumption data

Product datasheet: Conventional water heaters to regulation (EU) no. 812/2013 | 814/2013 / (S.I. 2019 No. 539 / Programme 2)

	DEM 3	DEM 4	DEM 6	DEM 7
	231001	231002	231215	232769
Manufacturer	STIEBEL ELTRON	STIEBEL ELTRON	STIEBEL ELTRON	STIEBEL ELTRON
Load profile	XXS	XXS	XXS	XXS
Energy efficiency class	A	A	A	A
Energy conversion efficiency	39	39	39	40
Annual power consumption	kWh	478	478	478
Default temperature setting	°C	38	38	38
Sound power level	dB(A)	15	15	15
Special information on efficiency measurement	none	none	none	none
Daily power consumption	kWh	2.200	2.200	2.200

INSTALLATION

Specification

15.6 Data table

		DEM 3				DEM 4				DEM 6				DEM 7
		231001				231002				231215				232769
Electrical data
Rated voltage	V	200	220	230	240	200	220	230	240	200	220	230	240	380	400
Rated output	kW	2.7	3.2	3.53	3.8	3.3	4.0	4.4	4.8	4.3	5.2	5.7	6.2	5.9	6.5
Rated current	A	13.3	14.5	15.2	15.8	16.7	18.2	19.1	20.0	21.6	23.6	24.7	25.8	15.5	16.3
Fuse protection	A				16				20	25	25	25	32	16	20
Frequency	Hz				50/60				50/60				50/60		50/-
Phases					1/N/PE				1/N/PE				1/N/PE		2/PE
Resistivity ρ15 ≥ (at θcold ≤25 °C)	Ω cm				1000				1000				1000		1000
Conductivity σ15 ≤ (at θcold ≤25 °C)	μS/cm				1000				1000				1000		1000
Resistivity ρ15 ≥ (at θcold ≤50 °C)	Ω cm				1300				1300				1300		1300
Conductivity σ15 ≤ (at θcold ≤50 °C)	μS/cm				770				770				770		770
Max. mains impedance at 50 Hz	Ω	0.091	0.083	0.079	0.076	0.072	0.065	0.063	0.06	0.056	0.051	0.049	0.047	0.236	0.225
Connections
Water connection					G 3/8 A				G 3/8 A				G 3/8 A		G 3/8 A
Application limits
Max. permissible pressure	MPa				1				1				1		1
Max. inlet temperature for reheating	°C				50				50				50		50
Values
Max. permissible inlet temperature	°C				55				55				55		55
Temperature setting range, DHW	°C				30-50				30-50				30-50		30-50
On	l/min				>1.5				>1.8				>2.2		>2.2
Pressure drop at flow rate	MPa				0.05				0.06				0.07		0.07
Flow rate for pressure drop	l/min				1.5				1.8				2.2		2.2
Flow rate limit at	l/min				2.0				2.2				3.2		3.2
DHW delivery	l/min				2.0				2.5				3.2		3.7
Δθ on delivery	K				25				25				25		25

INSTALLATION

Specification

Hydraulic data
		DEM 3	DEM 4	DEM 6	DEM 7
Nominal capacity	1	0.1	0.1	0.1	0.1
Versions
Oversink installation		X	X	X	X
Undersink installation		X	X	X	X
Open vented type		X	X	X	X
Sealed unvented type		X	X	X	X
Protection class		1	1	1	1
Insulating block		Plastic	Plastic	Plastic	Plastic
Heating system, heat generator		Bare wire	Bare wire	Bare wire	Bare wire
Cover and back panel		Plastic	Plastic	Plastic	Plastic
Colour		white	white	white	white
IP rating		IP 25	IP 25	IP 25	IP 25
Dimensions
Height	mm	143	143	143	143
Width	mm	190	190	190	190
Depth	mm	82	82	82	82
Length of connecting cable	mm	700	700	700	700
Weights
Weight	kg	1.5	1.5	1.5	1.5

Note

The appliance conforms to IEC 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 guarantee is only granted if the subsidiary has issued its own terms of guarantee. No other guarantee will be granted.

We shall not provide any guarantee for appliances acquired in countries where we have no subsidiary to sell our products. This will not affect warranties issued by any importers.

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.

PAP

Dispose of the document at the end of the appliance's life cycle in accordance with national regulations.

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