STIEBEL ELTRON DHM 3 Bedienungsanleitung

INSTALLATION

INSTALLATIE

INSTALACJA

INŠTALÁCIA

INSTALARE

МОНТА Ж

Hydraulisch gesteuerter Mini-Durchlauferhitzer | Hydraulically controlled mini instantaneous

water heaters | Mini chauffe-eau instantané à gestion hydraulique | Hydraulisch gestuurde mini-

doorstromer| Hydraulicznie sterowany mini przepływowy ogrzewacz | Hydraulicky riadený mini

prietokový ohrievač | Mini-încălzitor instant controlat hidraulic | Малогабаритный проточный

нагреватель с гидравлическим управлением

» DHM 3

» DHM 4

» DHM 6

» DHM 7

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ENGLISH

CONTENTS

INSTALLATION

1. Safety�� 20

1.1 General safety instructions ��20

1.2 Instructions, standards and regulations ��20

1.3 Units of measurement ��20

2. Appliance description �� 21

2.1 Standard delivery�� 21

2.2 Accessories�� 21

3. Preparations�� 22

4. Installation�� 22

4.1 Installation site�� 22

4.2 Installation options ��22

4.3 Connecting the power supply �� 25

5. Commissioning �� 26

5.1 Initial start-up�� 26

5.2 Appliance handover�� 26

5.3 Recommissioning�� 27

6. Shutting down�� 27

7. Troubleshooting �� 27

8. Maintenance �� 28

9. Speciﬁcation �� 29

9.1 Dimensions and connections �� 29

9.2 Wiring diagram ��30

9.3 Increasing the temperature�� 31

9.4 Application areas �� 32

9.5 Details on energy consumption�� 33

9.6 Data table ��34

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INSTALLATION

Safety

INSTALLATION

1. Safety

Only a qualiﬁed contractor should carry out installation, commis-

sioning, maintenance and repair of the appliance.

1.1 General safety instructions

We guarantee trouble-free function and operational reliability only

if original accessories and spare parts intended for the appliance

are used.

!Material losses

Observe the max. permissible inlet temperature. Higher

temperatures may damage the appliance. You can limit

the inlet temperature by means of a central thermostatic

valve (see chapter "Appliance description/ Accessories").

1.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations

and instructions.

The speciﬁc electrical resistance of the water must not fall below

that stated on the type plate. In a linked water network, factor in

the lowest electrical resistance of the water (see chapter "Speci-

ﬁcation/ Data table"). Your water supply utility will advise you of

the speciﬁc electrical water resistance or conductivity.

1.3 Units of measurement

Note

Unless speciﬁed otherwise, all dimensions are given in

mm.

OPERATION

Appliance description

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2. Appliance description

2.1 Standard delivery

The following are delivered with the appliance:

- Sieve inside the cold water inlet

- Special aerator "SR"

- Connection hose 3/8, 500mm long, with gaskets*

- Tee 3/8*

*for the connection as pressure-tested appliance

2.2 Accessories

Special aerator "SR"*

- SR 3: Part number 289591

for DHM 3 and DHM 4

- SR 5: Part number 270582

for DHM 6 and DHM 7

* For use in thread M22/M24.

Pressure-tested tap

- WEH Sensor tap for washbasins

Non-pressurised taps

- WEN Sensor tap for washbasins

- MAZ Twin lever basin tap

- MAE Mono lever basin tap

ZTA 3/4 - central thermostatic valve

Thermostatic valve for central premixing, for example for operat-

ing an instantaneous water heater with a solar thermal system.

OPERATION

Preparations

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3. Preparations

 Flush the water line thoroughly.

Water installation

A safety valve is not required.

Taps

 Use suitable taps (see chapter "Appliance description/

Accessories").

Note

Fitting the special aerator supplied provides an optimum

water jet.

4. Installation

4.1 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 only suitable for undersink installation (water

connections at the top).

DANGER Electrocution

Protection rating IP25 is only ensured if the appliance

back panel is ﬁtted.

 Always ﬁt the appliance back panel.

4.2 Installation options

Undersink installation, pressure-tested, with pressure-tested

tap

26�02�05�0093

OPERATION

Installation

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Undersink installation, non-pressurised, with non-pressurised

tap

26�02�05�0080

4.2.1 Appliance installation

 Mount the appliance on the wall.

Note

The wall must have a sufﬁcient load-bearing capacity.







26�02�05�0083

 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.

OPERATION

Installation

24 | DHM www.stiebel-eltron.com





26�02�05�0084

 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.







26�02�05�0085

 Route the power cable through the cable entry 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.

OPERATION

Installation

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4.2.2 Tap installation

!Material losses

When making the connections, counter the torque on the

appliance using a size 14 spanner.

Pressurised connection

 Fit the 3/8 connection hose provided and the 3/8 tee.

 Install the tap. For this, also observe the tap operating and

installation instructions.

Non-pressurised connection

 Install the tap. For this, also observe the tap operating and

installation instructions.

4.3 Connecting the power supply

DANGER Electrocution

Carry out all electrical connection and installation work

in accordance with regulations.

DANGER Electrocution

Ensure that the appliance is earthed.

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 (DHM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. A maximum cross-section of 3x6mm² may

be used.

!Material losses

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.

26 | DHM www.stiebel-eltron.com

INSTALLATION

Commissioning

!Material losses

Take note of the type plate. The speciﬁed voltage must

match the mains voltage.

 Connect the power cable as shown in the wiring diagram

(see chapter "Speciﬁcation/ Wiring diagram").

5. Commissioning

5.1 Initial start-up

26�02�05�0087

 Fill the appliance 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 function of the appliance.

5.2 Appliance handover

 Explain the appliance function to users and familiarise them

with its operation.

 Make users aware of potential dangers, especially the risk of

scalding.

 Hand over these instructions.

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INSTALLATION

Shutting down

5.3 Recommissioning

!Material losses

Following an interruption of the water supply, recommis-

sion the appliance by carrying out the following steps,

in order to prevent irreparable damage to the bare wire

heating system.

 Isolate the appliance from the power supply. Pull the power

cable plug, if present, from the socket, or remove the fuse/

reset the MCB.

 See chapter "Initial start-up".

6. Shutting down

 Isolate the appliance from the power supply by means of the

fuse/MCB in your fuse box or by pulling the power cable plug

from the socket.

 Drain the appliance (see chapter "Maintenance").

7. 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 sieve in the cold

water line is blocked.

Clean the sieve after

shutting off the cold

water inlet line.

The heater is faulty.

Check the resistance of

the heating system and

replace the appliance if

required.

The safety pressure

limiter has responded.

Remedy the cause of the

fault. Isolate the appli-

ance from the power

supply and depressurise

the water line. Activate

the safety pressure

limiter.

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