STIEBEL ELTRON PEO Operation Instruction

OPERATION AND INSTALLATION

OPERACIÓN E INSTALACIÓN

OBSLUHA A INSTALACE

OBSŁUGA I INSTALACJA

РАКУВАЊЕ И ИНСТАЛАЦИЈА

ЭКСПЛУАТАЦИЯ И УСТАНОВКА

Electronically controlled instantaneous water heater | Calentador instantáneo con regulación

electrónica | Elektronicky regulovaný průtokový ohřívač| Elektronicznie regulowany przepływowy

ogrzewacz wody | Електронски регулиран проточен бојлер | Проточный водонагреватель с

электронным управлением

» PEO 18/21/24

» PEO 27

Made in Germany

2 | PEO 18/21/24 | PEO 27 www.stiebel-eltron.com

CONTENTS | SPECIAL INFORMATION

SPECIAL INFORMATION

OPERATION

1. General information ��3

1.1 Safety instructions �� 3

1.2 Other symbols in this documentation �� 3

1.3 Units of measurement �� 3

2. Safety ��4

2.1 Intended use �� 4

2.2 General safety instructions �� 4

2.3 Test symbols �� 4

3. Appliance description ��4

4. Settings �� 5

5. Cleaning, care and maintenance ��5

6. Troubleshooting ��5

INSTALLATION

7. Safety ��6

7.1 General safety instructions �� 6

7.2 Instructions, standards and regulations �� 6

8. Appliance description ��6

8.1 Standard delivery �� 6

9. Preparations ��6

9.1 Installation site �� 6

9.2 Water installation �� 7

10. Installation ��7

10.1 Standard installation �� 7

10.2 Installation options ��10

10.3 Completing the installation ��12

11. Commissioning �� 12

11.1 Initial start-up �� 12

11.2 Recommissioning �� 13

12. Shutdown �� 13

13. Troubleshooting �� 13

14. Maintenance �� 14

15. Speciﬁcation �� 14

15.1 Dimensions and connections �� 14

15.2 Wiring diagram �� 15

15.3 DHW output �� 15

15.4 Application areas/ conversion table ��15

15.5 Pressure drop �� 16

15.6 Fault conditions �� 16

15.7 Details on energy consumption ��16

15.8 Data table ��17

GUARANTEE

ENVIRONMENT AND RECYCLING

SPECIAL

INFORMATION

- The appliance may be used by children aged 8

and up and persons with reduced physical, sen-

sory or mental capabilities or a lack of experience

and know-how, provided that they are supervised

or they have been instructed on how to use the

appliance safely and have understood the result-

ing risks. Children must never play with the ap-

pliance. Children must never clean the appliance

or perform user maintenance unless they are

supervised.

- Risk of scalding: The tap can reach temperatures

in excess of 60°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.

- Secure the appliance as described in chapter "In-

stallation/ Installation".

- Observe the maximum permissible pressure (see

chapter "Speciﬁcation/ Data table").

- Drain the appliance as described in chap-

ter "Installation/ Maintenance/ Draining the

appliance".

OPERATION

General information

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ENGLISH

OPERATION

1. General information

The chapters "Special Information" and "Operation" are intended

for both the user and qualiﬁed contractors.

The chapter "Installation" is intended for qualiﬁed contractors.

Note

Read these instructions carefully before using the appli-

ance and retain them for future reference.

Pass on the instructions to any new user where appro-

priate.

1.1 Safety instructions

1.1.1 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.

1.1.2 Symbols, type of risk

Symbol Type of risk

Injury

Electrocution

Burns

(burns, scalding)

1.1.3 Keywords

KEYWORD Meaning

DANGER Failure to observe this information will result in serious in-

jury 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.

1.2 Other symbols in this documentation

Note

General information is identiﬁed by the adjacent symbol.

 Read these texts carefully.

Symbol Meaning

Material losses

(appliance damage, consequential losses and environmental

pollution)

Appliance disposal

 This symbol indicates that you have to do something. The ac-

tion you need to take is described step by step.

1.3 Units of measurement

Note

All measurements are given in mm unless stated other-

wise.

!

OPERATION

Safety

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2. Safety

2.1 Intended use

This appliance is intended for domestic use. It can be used safely

by untrained persons. The appliance can also be used in a non-do-

mestic environment, e.g.in a small business, as long as it is used

in the same way.

This pressurised appliance is suitable for heating domestic hot

water or for reheating preheated water. The appliance can supply

one or more draw-off points.

Any other use beyond that described shall be deemed inappropri-

ate. Observation of these instructions and of instructions for any

accessories used is also part of the correct use of this appliance.

2.2 General safety instructions

CAUTION Burns

During operation, the tap can reach temperatures in ex-

cess of 60 °C.

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 ther-

mal system, the DHW temperature may vary from the se-

lected set temperature.

!

WARNING Injury

The appliance may be used by children aged8 and up and

persons with reduced physical, sensory or mental capa-

bilities or a lack of experience and know-how, provided

that they are supervised or they have been instructed on

how to use the appliance safely and have understood the

resulting risks. Children must never play with the appli-

ance. Children must never clean the appliance or perform

user maintenance unless they are supervised.

Where children or persons with limited physical, sensory or men-

tal abilities are allowed to use this appliance, we recommend a

permanent temperature limit. A qualiﬁed contractor can set the

limit for you.

!

Material losses

The user should protect the appliance and its tap against

frost.

2.3 Test symbols

See type plate on the appliance.

3. Appliance description

The electronically controlled instantaneous water heater with au-

tomatic output matching keeps the outlet temperature constant

up to the output limit. The temperature is then selected via the

draw-off tap.

Heating system

The bare wire heating system has a pressure-tested plastic casing.

The heating system is suitable for hard and soft water areas and is

largely insusceptible to scale build-up. This heating system ensures

rapid and efﬁcient DHW availability.

Note

The appliance is equipped with an air detector that largely

prevents damage to the heating system. If, during op-

eration, air is drawn into the appliance, the appliance

shuts down for one minute, thereby protecting the heating

system.

OPERATION

Settings

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ENGLISH

4. Settings

The DHW outlet temperature can be variably adjusted. The selected

temperature is displayed. At temperatures over 43°C, the colour of

the display changes from blue to red to indicate a risk of scalding.

D0000041609

 Turn the temperature selector to the required temperature.

Note

If the outlet temperature is not sufﬁciently high when the

draw-off valve is fully open and the temperature selector

is set to maximum, then more water is ﬂowing through

the appliance than can be heated by the heating system

(appliance is at its output limit).

 Reduce the water volume at the draw-off valve.

Recommended setting for operation with a thermostatic valve

Set the temperature at the appliance to the maximum temperature.

Following an interruption to the water supply

!

Material losses

Following an interruption of the water supply the appli-

ance must be recommissioned by carrying out the follow-

ing steps, in order to prevent the destruction of the bare

wire heating system.

 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 the mains power back ON again.

5. Cleaning, care and maintenance

 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.

6. Troubleshooting

Problem Cause Remedy

The appliance will not

start despite the DHW

valve being fully open.

There is no power.

Check the fuses/MCBs in

your fuse box/distribution

panel.

The flow rate is too low.

The aerator in the tap or

the shower head is scaled

up or contaminated.

Clean and/or descale the

aerator or shower head.

Required temperature

>45°C is not achieved.

The water supply has

been interrupted.

Vent the appliance and

the cold water inlet line

(see chapter "Settings").

The cold water inlet tem-

perature is >45°C.

Reduce the cold water

inlet temperature.

If you cannot remedy the fault, notify your qualiﬁed contractor.

To facilitate and speed up your enquiry, please provide the serial

number from the type plate (000000-0000-00000):

Nr.: 000000-0000-00000

D0000041614

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INSTALLATION

Safety

INSTALLATION

7. Safety

Only a qualiﬁed contractor should carry out installation, commis-

sioning, 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.

!

Material losses

Observe the maximum inlet temperature. Higher tem-

peratures may damage the appliance. You can limit the

maximum inlet temperature by installing a central ther-

mostatic valve.

7.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations

and instructions.

- The IP 25 (hoseproof) rating can only be ensured with a cor-

rectly ﬁtted cable grommet.

- The speciﬁc electrical resistance of the water must not fall

below that stated on the type plate. In a linked water net-

work, observe the lowest electrical water resistance (see

chapter "Speciﬁcation/ Application areas/ Conversion table").

Your water supply utility will advise you of the speciﬁc electri-

cal resistance or conductivity of the water.

8. Appliance description

8.1 Standard delivery

The following are delivered with the appliance:

- Wall mounting bracket

- Threaded stud for wall mounting

- Installation template

- 2 twin connectors (cold water with shut-off valve)

- Flat gaskets

- Cable grommet (power cable from above/ below)

- Screws/ rawl plugs for securing the back panel to allow for

water connection on ﬁnished walls

For appliance replacement:

- 2 tap extensions

9. Preparations

9.1 Installation site

!

Material losses

Install the appliance in a room free from the risk of frost.

 Always install the appliance vertically and near the draw-off

point.

The appliance is suitable for undersink and oversink installation.

Undersink installation

26�02�02�1345

1

2

1 Cold water inlet

2 DHW outlet

Oversink installation

12

26�02�02�1344

1 Cold water inlet

2 DHW outlet

Note

 Mount the appliance on the wall. The wall must have

a sufﬁcient load-bearing capacity.

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ENGLISH

INSTALLATION

Installation

9.2 Water installation

- No safety valve is required.

- Safety valves are not permissible in the DHW pipe.

 Flush the water line thoroughly.

 Ensure that the ﬂow rate for switching on the appliance is

achieved (see chapter "Speciﬁcation/ Data table", On). If the

ﬂow rate is not achieved, remove the ﬂow limiter (see chapter

"Installation/ Removing the ﬂow limiter").

 Increase the mains water pressure if the required ﬂow rate is

not achieved with the draw-off valve fully opened.

Taps/valves

Use appropriate pressure taps. Open vented taps are not permitted.

Note

Never use the shut-off valve in the cold water inlet to

reduce the ﬂow rate. It is intended for shutting off the

appliance.

Permissible water line materials

- Cold water supply line:

Galvanised steel pipe, stainless steel pipe, copper pipe or

plastic pipe

- 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 pressure

(see chapter "Speciﬁcation/ Data table").

Flexible water connection lines

 If the appliance is installed with ﬂexible water connection

lines, ensure that the pipe bends with bayonet ﬁttings do not

become twisted inside the appliance.

 Secure the back panel at the bottom with two additional

screws.

10. Installation

10.1 Standard installation

- Electrical connection from above; installation on unﬁnished

walls

- Water connection on unﬁnished walls

- PEO 18/21/24: medium connected load is preset

For further installation options, see chapter "Alternative installation

methods":

- Electrical connection from below on unﬁnished walls

- Electrical connection on ﬁnished walls

- Connecting a load shedding relay

- Water installation on ﬁnished walls

- Water connection on unﬁnished walls for appliance

replacement

- Operation with preheated water

- Temperature limit

Opening the appliance

D0000041615

 Open the appliance by releasing the snap lock.

NT

T-

so

X1

26�02�02�0762

 Remove the back panel by pressing the two locking hooks and

pulling the base part of the back panel forwards.

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INSTALLATION

Installation

Preparing the power cable

160

≥ 30

26�02�02�0887

Fitting the wall mounting bracket

26�02�02�0972

 Mark out the holes for drilling using the installation template.

If the appliance is to be installed with water connections on

ﬁnished walls, also mark out the ﬁxing holes in the lower part

of the template.

 Drill the holes and secure the wall mounting bracket with

2screws and 2rawl plugs (screws and rawl plugs are not part

of the standard delivery).

 Fit the threaded stud provided.

 Fit the wall mounting bracket.

Fitting the cable grommet

26�02�02�0950

 Fit the cable grommet. For connecting cables >6mm², en-

large the hole in the cable grommet.

Making the water connection

!

Material losses

Carry out all water connection and installation work in

accordance with regulations.

26�02�02�0948

 Seal and insert the twin connectors.

!

Material losses

Never use the shut-off valve in the cold water inlet to

reduce the ﬂow rate.

Preparing the back panel

!

Material losses

If you break open the wrong knock-out in the back panel

by mistake, you must use a new back panel.

L

D0000041893

 Break out the relevant cable grommet knock-out in the back

panel. Deburr any sharp edges with a ﬁle if necessary.

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ENGLISH

INSTALLATION

Installation

Installing the appliance

L

3

L3’

4

L2’

1

L1’

2

L

MV

NT C

T- soll

X1 1

D0000041894

 Push the back panel over the threaded stud and the cable

grommet. Pull the cable grommet by the locking hooks into

the back panel using pliers, until both locking hooks audibly

click into place.

 Remove the protective transport plugs from the water

connections.

 Press the back panel ﬁrmly into place and lock the ﬁxing tog-

gle by turning it clockwise through 90°.

D0000041925

 Screw the water connection pipes with ﬂat gaskets onto the

twin connectors.

!

Material losses

The strainer must be ﬁtted for the appliance to function.

 When replacing an appliance, check whether the

strainer is installed (see chapter "Maintenance").

Removing the ﬂow limiter

!

Material losses

If you use a thermostatic valve, the ﬂow limiter must not

be removed.

L1’

2

L

X11

26�02�02�0771

2

1

1 Plastic proﬁle washer

2 Flow limiter

 Remove the ﬂow limiter and reﬁt the plastic proﬁle washer.

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 remova-

ble cable grommet. Ensure the appliance can be separated

from the power supply by an isolator that disconnects 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 voltage must match

the mains voltage.

 Connect the power cable to the mains terminal (see chapter

"Speciﬁcation/ Wiring diagram").

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INSTALLATION

Installation

PEO 18/21/24: Re-plugging the coding card

In its delivered condition, the appliance is set to 21kW. When

changing to a different connected load, carry out the following

steps:

D0000047341

 Re-plug the coding card according to the selected connected

load (for selectable connected load and fuse protection of the

appliance, see chapter "Speciﬁcation/ Data table").

 Tick the selected connected load on the type plate. Use a ball-

point pen to do this.

Fitting the base part of the back panel

3

L

3’

4

L

2’

1

L

1’

2

L

NT C

T-

sol

l

X11

26�02�02�1348

 Position the lower back panel on the main back panel and

click it into place.

 Align the mounted appliance by loosening the ﬁxing toggle,

aligning the power supply and back panel, and then re-tight-

ening the ﬁxing toggle. If the back panel is not ﬂush with the

wall, the appliance can be secured at the bottom with two

additional screws.

10.2 Installation options

10.2.1 Electrical connection from below on unﬁnished walls

1

L1í

2

L

X11

26�02�02�0767

 Fit the cable grommet.

!

Material losses

If you break open the wrong knock-out in the back panel

by mistake, you must use a new back panel.

 Break out the relevant cable grommet knock-out in the back

panel. Deburr any sharp edges with a ﬁle if necessary.

 Reposition the mains terminal in the appliance from the top

to the bottom.

 Push the back panel over the threaded stud and the cable

grommet. Pull the cable grommet by the locking hooks into

the back panel using pliers, until both locking hooks audibly

click into place.

 Press the back panel ﬁrmly into place and lock the ﬁxing tog-

gle by turning it clockwise through 90°.

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ENGLISH

INSTALLATION

Installation

10.2.2 Electrical connection on ﬁnished walls

Note

This type of connection changes the protection 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.

!

Material losses

If you break open the wrong knock-out in the back panel

by mistake, you must use a new back panel.

 Cleanly cut or break out the required cable entries in the back

panel (for positions, see chapter "Speciﬁcation/ Dimensions

and connections"). Deburr any sharp edges with a ﬁle if

necessary.

 Route the power cable through the cable grommet and con-

nect it to the mains terminal.

10.2.3 Connecting a load shedding relay

When operating additional electric appliances, such as electric

storage heaters, install a load shedding relay in the distribution

board. The relay responds when the instantaneous water heater

starts.

!

Material losses

Connect the phase that switches the load shedding relay

to the indicated terminal of the mains terminal in the

appliance (see chapter "Speciﬁcation/ Wiring diagram").

10.2.4 Water installation on ﬁnished walls

Note

This type of connection changes the protection 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.

26�02�02�0765

 Fit water plugs with gaskets to seal the in-wall connection.

 Fit a suitable pressure tap.

26�02�02�1006

 Click the lower section of the back panel into place in the

upper section of the back panel.

 Secure the connection pipes to the appliance.

 Secure the back panel at the bottom with two additional

screws.

!

Material losses

If you break open the wrong knock-out in the back panel

by mistake, you must use a new back panel.

 Cleanly break out the knock-outs in the appliance cover. De-

burr any sharp edges with a ﬁle if necessary.

 Slide the lower back panel under the connection pipes of the

tap and click the lower back panel into place.

 Secure the connection pipes to the appliance.

10.2.5 Water installation on unﬁnished walls for appliance

replacement

If the existing twin connectors of the old appliance only protrude

from the wall by approx.16mm, you cannot use the twin connec-

tors provided.

Note

With this connection, the cold water supply can only be

shut off within the domestic installation.

16

D0000041634

 Seal and ﬁt the screw-in tap extensions provided.

 Connect the appliance.

10.2.6 Operation with preheated water

You can limit the maximum inlet temperature by installing a central

thermostatic valve.

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INSTALLATION

Commissioning

10.2.7 Temperature limit

CAUTION Burns

If operating with preheated water, the set temperature

limit and anti-scalding protection may be ineffective.

 In such cases, limit the temperature with an up-

stream central thermostatic valve.

You can set the temperature limit inside the appliance cover to

43°C.

D0000041912

 Switch the temperature limit to 43°C.

The temperature selector enables the temperature to be set to a

value between 30°C and 43°C.

10.3 Completing the installation

 Open the shut-off valve in the twin connector or the cold

water inlet line.

11. Commissioning

WARNING Electrocution

Commissioning must only be carried out by a qualiﬁed

contractor in accordance with safety regulations.

11.1 Initial start-up

D0000041618

 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 pressure limiter by ﬁrmly pressing the reset

button (the appliance is delivered with the safety pressure

limiter deactivated).

 Plug the temperature selector cable plug into the PCB.

 Fit the appliance cover, ensuring it clicks into place. Check that

the appliance cover is seated correctly.

 Switch the mains power ON.

 Check the function of the appliance.

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ENGLISH

INSTALLATION

Shutdown

Appliance handover

 Explain the appliance function to users and familiarise them

with its operation.

 Make the user aware of potential dangers, especially the risk

of scalding.

 Hand over these instructions.

11.2 Recommissioning

Vent the appliance and the cold water inlet line (see chapter "Set-

tings").

See chapter "Commissioning".

12. Shutdown

 Isolate all poles of the appliance from the power supply.

 Drain the appliance (see chapter "Maintenance").

13. Troubleshooting

WARNING Electrocution

To test the appliance, it must be supplied with power.

Indication variants for diagnostic trafﬁc light (LED)

Red Illuminates in the event of a fault

Yellow Illuminates during heating operation

Green Flashing: Appliance is connected to power supply

1

D0000041794

1 Diagnostic trafﬁc light

Fault / LED diagnos-

tic light display

Cause Remedy

The flow rate is too low. The strainer in the appli-

ance is dirty.

Clean the strainer.

The set temperature is not

achieved.

One phase down.

Check the fuse/MCB in

your fuse box/distribution

panel.

The heating system does

not switch on.

Air has been detected in

the water and heating

output is briefly switched

off.

The appliance restarts

after one minute.

No hot water and no traf-

fic light display.

The MCB/fuse has re-

sponded/blown.

Check the fuse/MCB in

your fuse box/distribution

panel.

Safety pressure limiter

AP3 has tripped.

Remove the cause of the

fault (e.g. faulty pressure

flush).

Protect the heating sys-

tem against overheating

by opening a draw-off

valve downstream of the

appliance for one minute.

This depressurises and

cools down the heating

system.

Activate the safety

pressure limiter at flow

pressure by pressing the

reset button (see chapter

"Commissioning").

The PCB is faulty. Check the PCB and re-

place if required.

Traffic light display: Green

flashes or constantly on

The PCB is faulty. Check the PCB and re-

place if required.

No hot water at a flow

rate

>2.5l/min.

The flow meter (DFE) is

not plugged in.

Plug the flow meter plug

back in.

The flow meter (DFE) is

faulty.

Check the flow meter and

replace if required.

Traffic light display: Yel-

low constantly on, green

flashing

The high limit safety

cut-out has responded or

suffered a lead break.

Check the high limit safety

cut-out and replace it if

required.

No hot water at a flow

rate

>3l/min.

The heating system is

faulty.

Check the heating system

resistor and replace if

required.

The PCB is faulty. Check the PCB and re-

place if required.

Traffic light display: Yel-

low constantly on, green

flashing

The outlet sensor is un-

plugged or the lead is

broken.

Plug in the outlet sensor

or replace if required.

Traffic light display: Red

constantly on, green

flashing

The cold water sensor is

faulty.

Check the PCB and re-

place if required.

No hot water

Required temperature >

45°C is not achieved.

The cold water inlet tem-

perature exceeds 45°C.

Reduce the cold water

inlet temperature to the

appliance.

Traffic light display: Red

constantly on, green

flashing

The outlet sensor is faulty

(short circuit).

Check the outlet sensor

and replace if required.

14 | PEO 18/21/24 | PEO 27 www.stiebel-eltron.com

INSTALLATION

Maintenance

14. Maintenance

WARNING Electrocution

Before any work on the appliance, ensure omnipolar dis-

connection from the power supply.

Draining the appliance

The appliance can be drained for maintenance work.

WARNING Burns

Hot water may escape when draining the appliance.

 Close the shut-off valve in the twin connector or the cold

water inlet line.

 Open all draw-off valves.

 Undo the water connections on the appliance.

 Store the dismantled appliance in a room free from the risk

of frost, as water residues remaining inside the appliance can

freeze and cause damage.

Cleaning the strainer

26�02�02�0949

If contaminated, clean the strainer in the threaded cold water ﬁt-

ting. Close the shut-off valve in the cold water inlet line before

removing, cleaning and reﬁtting the strainer.

15. Speciﬁcation

15.1 Dimensions and connections

395

100

485

325

45

5

93

226

190

50

112

190

35

c01

c06

b02

D0000017757

b02 Entry electrical cables I

c01 Cold water inlet Male thread G 1/2 A

c06 DHW outlet Male thread G 1/2 A

Alternative connection options

325

50

35

40

b03

b02

b04

D0000019778

b02 Entry electrical cables I

b03 Entry electrical cables II

b04 Entry electrical cables III

www.stiebel-eltron.com PEO 18/21/24 | PEO 27| 15

ENGLISH

INSTALLATION

Specication

15.2 Wiring diagram

3/PE ~ 380-415 V

85�02�02�0005

1 Heater

2 High limit safety cut-out

3 Safety pressure limiter

Priority control with LR 1-A

85�02�02�0003�

2

1

1 Control cable to the contactor of the 2nd appliance (e.g. elec-

tric storage heater).

2 Control contact opens when switching the instantaneous

water heater on.

15.3 DHW output

The DHW output is subject to the mains voltage, the appliance's

connected load and the cold water inlet temperature. The rated

voltage and rated output can be found on the type plate (see chap-

ter "Troubleshooting").

Connected load in kW 38°C DHW output in l/min.

Rated voltage Cold water inlet temperature

380 V 400 V 415 V 5°C 10°C 15°C 20°C

16.2 7.0 8.3 10.1 12.9

16.3 7.1 8.3 10.1 12.9

18.0 7.8 9.2 11.2 14.3

19.0 8.2 9.7 11.8 15.1

19.4 8.4 9.9 12.0 15.4

21.0 9.1 10.7 13.0 16.7

21.7 9.4 11.1 13.5 17.2

22.6 9.8 11.5 14.0 17.9

23.5 10.2 12.0 14.6 18.7

24.0 10.4 12.2 14.9 19.0

24.4 10.6 12.4 15.2 19.4

25.8 11.2 13.2 16.0 20.5

26.0 11.3 13.3 16.1 20.6

27.0 11.7 13.8 16.8 21.4

Connected load in kW 50°C DHW output in l/min.

Rated voltage Cold water inlet temperature

380 V 400 V 415 V 5°C 10°C 15°C 20°C

16.2 5.1 5.8 6.6 7.7

16.3 5.2 5.8 6.7 7.8

18.0 5.7 6.4 7.3 8.6

19.0 6.0 6.8 7.8 9.0

19.4 6.2 6.9 7.9 9.2

21.0 6.7 7.5 8.6 10.0

21.7 6.9 7.8 8.9 10.3

22.6 7.2 8.1 9.2 10.8

23.5 7.5 8.4 9.6 11.2

24.0 7.6 8.6 9.8 11.4

24.4 7.7 8.7 10.0 11.6

25.8 8.2 9.2 10.5 12.3

26.0 8.3 9.3 10.6 12.4

27.0 8.6 9.6 11.0 12.9

15.4 Application areas/ conversion table

Speciﬁc electrical resistance and speciﬁc electrical conductivity (see

chapter "Data table").

Standard specifica-

tion at 15°C

20°C

25°C

Resist-

ance

ρ

≥

Conductivity σ

≤

Resist-

ance

ρ

≥

Conductivity σ

≤

Resist-

ance

ρ

≥

Conductivity σ

≤

Ωcm mS/m μS/cm Ωcm mS/m μS/cm Ωcm mS/m μS/cm

900 111 1111 800 125 1250 735 136 1361

1000 100 1000 890 112 1124 815 123 1227

1100 91 909 970 103 1031 895 112 1117

1200 83 833 1070 93 935 985 102 1015

1300 77 769 1175 85 851 1072 93 933

16 | PEO 18/21/24 | PEO 27 www.stiebel-eltron.com

INSTALLATION

Specication

15.5 Pressure drop

Taps/valves

Tap pressure drop at a flow rate of 10 l/min

Mono lever mixer tap, approx. MPa 0.04 - 0.08

Thermostatic valve, approx. MPa 0.03 - 0.05

Hand shower, approx. MPa 0.03 - 0.15

Sizing the pipework

When calculating the size of the pipework, an appliance pressure

drop of 0.1MPa is recommended.

15.6 Fault conditions

In the event of a fault, loads up to a maximum of 95 °C at a pressure

of 1.2MPa can occur temporarily in the installation.

15.7 Details on energy consumption

The product data complies with EU regulations relating to the Di-

rective on the ecological design of energy related products (ErP).

PEO 18/21/24 PEO 27

233991 233992

Manufacturer STIEBEL ELTRON STIEBEL ELTRON

Load profile S S

Energy efficiency class A A

Annual power consumption kWh 477 481

Energy conversion efficiency % 39 39

Default temperature setting °C 60 60

Sound power level dB(A) 15 15

Special information on measuring efficiency Data at Pmax. None

www.stiebel-eltron.com PEO 18/21/24 | PEO 27| 17

ENGLISH

GUARANTEE | ENVIRONMENT AND RECYCLING

15.8 Data table

PEO 18/21/24 PEO 27

233991 233992

Electrical data

Rated voltage V 380 400 415 380 400

Rated output kW 16.2/19/21.7 18/21/24 19.4/22.6/25.8 24.4 27

Rated current A 27.6/29.5/33.3 29/31/35 30.1/32.2/36.3 37.1 39

MCB/fuse rating A 32/32/35 32/32/35 32/32/40 40 40

Phases 3/PE 3/PE

Frequency Hz 50/60 50/60 50/- 50/60 50/60

Specific resistance ρ

15

≥ (at ϑcold ≤25°C) Ω cm 900 900 1000 900 900

Specific conductivity σ

15

≤ (at ϑcold ≤25°C) μS/cm 1111 1111 1000 1111 1111

Specific resistance ρ

15

≥ (at ϑcold ≤45°C) Ω cm 1200 1200 1300 1200 1200

Specific conductivity σ

15

≤ (at ϑcold ≤45°C) μS/cm 833 833 770 833 833

Max. mains impedance at 50Hz Ω 0.284 0.270 0.260 0.254 0.241

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 45 45

Values

Max. permissible inlet temperature °C 60 60

On l/min >2.5 >2.5

DHW delivery l/min 9.4/11.0/12.6 14.2

Δϑ on delivery K 26 26

Hydraulic data

Nominal capacity l 0.4 0.4

Versions

Temperature setting range °C 30-60 30-60

Safety category 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 IP25 IP25

Dimensions

Height mm 485 485

Width mm 226 226

Depth mm 93 93

Weights

Weight kg 3.6 3.6

GUARANTEE

ENVIRONMENT AND RECYCLING

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 grant-

ed 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 aect warranties issued by any importers.

Environment and recycling

We would ask you to help protect the environment. After use,

dispose of the various materials in accordance with national

regulations.

18 | PEO 18/21/24 | PEO 27 www.stiebel-eltron.com

CONTENIDO | INDICACIONES ESPECIALES

INDICACIONES ESPECIALES

OPERACIÓN

1. Indicaciones generales �� 19

1.1 Instrucciones de seguridad�� 19

1.2 Otras marcas presentes en esta documentación ��19

1.3 Unidades de medida ��19

2. Seguridad �� 20

2.1 Utilización conforme a las prescripciones �� 20

2.2 Instrucciones generales de seguridad ��20

2.3 Sello de certiﬁcación �� 20

3. Descripción del aparato �� 20

4. Conﬁguración �� 21

5. Limpieza, conservación y mantenimiento �� 21

6. Resolución de problemas �� 21

INSTALACIÓN

7. Seguridad �� 22

7.1 Instrucciones generales de seguridad ��22

7.2 Directivas, normas y disposiciones ��22

8. Descripción del aparato �� 22

8.1 Ámbito de suministro ��22

9. Preparativos �� 22

9.1 Lugar de montaje �� 22

9.2 Instalación de agua ��23

10. Montaje �� 23

10.1 Montaje estándar ��23

10.2 Alternativas de montaje �� 26

10.3 Finalizar montaje �� 28

11. Puesta en marcha �� 28

11.1 Primera puesta en marcha �� 28

11.2 Nueva puesta en marcha �� 28

12. Puesta fuera de servicio �� 29

13. Localización y reparación de averías �� 29

14. Mantenimiento �� 30

15. Especiﬁcaciones técnicas �� 30

15.1 Dimensiones y conexiones ��30

15.2 Esquema de conexiones eléctricas ��31

15.3 Rendimiento de agua caliente ��31

15.4 Ámbitos de aplicación/ Tabla de conversión ��31

15.5 Pérdida de presión �� 32

15.6 Condiciones en caso de avería �� 32

15.7 Datos sobre el consumo energético �� 32

15.8 Tabla de especiﬁcaciones ��33

GARANTÍA

MEDIO AMBIENTE Y RECICLADO

INDICACIONES

ESPECIALES

- El aparato puede ser utilizado por niños a partir

de 8 años, así como por personas con capaci-

dades físicas, sensoriales o mentales limitadas,

o con falta de experiencia y conocimientos, solo

bajo la vigilancia de otra persona o si antes han

recibido instrucciones sobre el uso seguro del

aparato y han comprendido los peligros que

pueden derivarse. No deje que los niños jueguen

con el aparato. Las tareas de limpieza y manteni-

miento propias del usuario no deben ser realiza-

das por niños sin vigilancia.

- Peligro de escaldamiento: Los grifos/válvulas

pueden calentarse a más de 60°C.

- El aparato debe poder desconectarse omnipolar-

mente de la red eléctrica mediante una separa-

ción de al menos 3mm.

- Fije el aparato tal como se describe en el capítulo

"Instalación/ Montaje".

- Tenga en cuenta la presión máxima admisible

(consulte el capítulo "Especiﬁcaciones técnicas/

Tabla de especiﬁcaciones").

- Vacíe el aparato tal y como se describe en el ca-

pítulo "Instalación/ Mantenimiento/ Vaciado del

aparato".

OPERACIÓN

Indicaciones generales

www.stiebel-eltron.com PEO 18/21/24 | PEO 27| 19

ESPA ÑOL

OPERACIÓN

1. Indicaciones generales

Los capítulos "Indicaciones especiales" y "Operación" están dirigi-

dos al usuario del aparato y al profesional técnico especializado.

El capítulo "Instalación" está dirigido al profesional técnico espe-

cializado.

Nota

Lea atentamente estas instrucciones antes del uso y ar-

chívelas en un lugar seguro.

Si entrega este aparato a otros usuarios, no olvide incluir

las instrucciones.

1.1 Instrucciones de seguridad

1.1.1 Estructura de las instrucciones de seguridad

!

PALABRA DE ADVERTENCIA Tipo de peligro

Mediante este tipo de palabras se explican las posibles

consecuencias en caso de desobedecimiento de las ins-

trucciones de seguridad.

 Aquí se proponen las medidas necesarias para evitar

el peligro.

1.1.2 Símbolos, tipo de peligro

Símbolo Tipo de peligro

Lesión

Electrocución

Quemaduras

(quemaduras, escaldadura)

1.1.3 Palabras de advertencia

PALABRA DE

ADVERTENCIA

Significado

PELIGRO Indicaciones cuyo desobedecimiento tiene como consecuen-

cia lesiones graves o la muerte.

ADVERTENCIA Indicaciones cuyo desobedecimiento puede tener como con-

secuencia lesiones graves o la muerte.

PRECAUCIÓN Indicaciones cuyo desobedecimiento puede tener como con-

secuencia lesiones de gravedad media o baja.

1.2 Otras marcas presentes en esta documentación

Nota

Las indicaciones generales se señalizan mediante el sím-

bolo adyacente.

 Lea atentamente las indicaciones.

Símbolo Significado

Daños materiales

(daños en el aparato, indirectos, medioambientales)

Eliminación del aparato

 Este símbolo le indica que usted tiene que hacer algo. Se des-

criben paso a paso las medidas necesarias.

1.3 Unidades de medida

Nota

Si no se indica lo contrario, todas las dimensiones estarán

expresadas en milímetros.

!

OPERACIÓN

Seguridad

20 | PEO 18/21/24 | PEO 27 www.stiebel-eltron.com

2. Seguridad

2.1 Utilización conforme a las prescripciones

El aparato está previsto para utilizarse en un ámbito doméstico.

Personas no instruidas lo pueden manejar de forma segura. El

aparato puede utilizarse igualmente en ámbitos que no sean do-

mésticos, como en pequeñas empresas, siempre que se maneje

del mismo modo.

El aparato a presión sirve para calentar agua potable o para re-

calentar agua previamente calentada. El aparato puede alimentar

uno o varios puntos de dispensado.

Cualquier otro uso distinto al aquí previsto se considera un uso

indebido. Se considera uso previsto el cumplimiento de estas ins-

trucciones, así como las instrucciones de los accesorios utilizados.

2.2 Instrucciones generales de seguridad

PRECAUCIÓN Quemaduras

Los grifos/válvulas pueden calentarse durante el funcio-

namiento a más de 60°C.

A temperaturas de salida superiores a 43°C existe peligro

de escaldamiento.

PRECAUCIÓN Quemaduras

La temperatura del agua caliente puede ser distinta de la

temperatura de referencia ajustada en un funcionamiento

con agua precalentada; p. ej., un sistema de calefacción

solar.

!

ADVERTENCIA Lesiones

El aparato puede ser utilizado por niños a partir de 8

años, así como por personas con capacidades físicas, sen-

soriales o mentales limitadas, o con falta de experiencia

y conocimientos, solo bajo la vigilancia de otra persona

o si antes han recibido instrucciones sobre el uso seguro

del aparato y han comprendido los peligros que pueden

derivarse. No deje que los niños jueguen con el apara-

to. Las tareas de limpieza y mantenimiento propias del

usuario no deben ser realizadas por niños sin vigilancia.

En caso de que niños u otras personas con capacidades físicas, sen-

soriales o mentales limitadas utilicen el aparato, recomendamos

una limitación de temperatura permanente. La limitación puede

realizarla un profesional técnico especializado.

!

Daños materiales

El usuario debe proteger el aparato y los grifos/válvulas

frente a la formación de escarcha.

2.3 Sello de certiﬁcación

Véase placa de especiﬁcaciones técnicas en el aparato.

3. Descripción del aparato

El calentador instantáneo con regulación electrónica con adapta-

ción automática de la potencia mantiene constante la temperatura

de salida hasta el límite de rendimiento. Posteriormente, la tem-

peratura se selecciona mediante la grifería de dispensado.

Sistema de calefacción

El sistema de calefacción de cables desnudos tiene una capa de

plástico estanca a la presión. El sistema de calefacción es apto

para agua tanto pobre como rica en cal, ya que es resistente a

la acumulación de cal. El sistema de calefacción abastece agua

caliente de forma rápida y eﬁcaz.

Nota

El aparato está equipado con un sistema de detección de

aire que evita que se produzcan daños en el sistema de

calefacción. Si durante el funcionamiento entra aire en el

aparato, el aparato desconectará la potencia de calefac-

ción durante un minuto, con lo que protegerá el sistema

de calefacción.

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