Stiebel Eltron WWK222H 220L Heat Pump Hot Water System User Manual

OPERATION AND INSTALLATION

DHW heat pump

» WWK222

» WWK222H

» WWK 302

» WWK 302 H

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CONTENTS

SPECIAL INFORMATION

OPERATION

1. General information ��4

1.1 Safety instructions �� 4

1.2 Other symbols in this documentation �� 4

1.3 Units of measurement �� 4

2. Safety �� 4

2.1 Intended use �� 4

2.2 General safety instructions �� 5

2.3 Test symbols �� 6

3. Appliance description ��6

3.1 Heat pump operating principle �� 6

3.2 DHW heating �� 6

3.3 Appliance operation outside the application limits �� 7

3.4 Frost protection �� 7

3.5 Minimum runtime and minimum pause time �� 7

3.6 Connection of an external signal transmitter �� 8

4. Settings ��8

4.1 Emergency shutdown �� 8

4.2 Weatherproof cover �� 8

4.3 Display and operating controls �� 9

4.4 Adjusting the settings�� 10

4.5 "Rapid heat-up" button �� 13

5. Cleaning, care and maintenance �� 14

5.1 Protective anode and battery change �� 14

6. Troubleshooting �� 14

INSTALLATION

7. Safety �� 17

7.1 General safety instructions �� 17

7.2 Instructions, standards and regulations �� 17

8. Appliance description �� 17

8.1 Standard delivery �� 17

8.2 Required accessories �� 17

8.3 Additional accessories �� 17

8.4 Incorrect use �� 17

9. Preparation �� 17

9.1 Transport �� 17

9.2 Storage �� 18

9.3 Installation site �� 18

9.4 Siting the appliance �� 19

10. Installation �� 20

10.1 Water connection �� 20

10.2 Condensate drain �� 21

10.3 Electrical connection �� 22

10.4 Assembling the appliance �� 24

11. Commissioning �� 25

11.1 Initial start-up �� 25

11.2 Recommissioning �� 25

12. Settings �� 26

13. Appliance shutdown �� 28

14. Troubleshooting �� 28

14.1 Fault codes �� 29

14.2 Resetting the safety pressure limiter �� 30

14.3 WWK222H/ WWK 302H : Resetting the high limit

safety cut-out �� 30

14.4 Motor overload relay �� 30

15. Maintenance �� 30

15.1 Removing the appliance cover �� 30

15.2 Removing the casing ring �� 31

15.3 Cleaning the evaporator �� 31

15.4 Draining the cylinder �� 31

15.5 Descaling the electric emergency/booster heater �� 32

15.6 Valves �� 32

15.7 Condensate drain �� 32

15.8 Replacing the power cable �� 32

15.9 Fitting the casing ring �� 32

15.10 Protective anode and battery change �� 32

15.11 Fitting the appliance cover �� 33

16. Speciﬁcation �� 34

16.1 Dimensions and connections �� 34

16.2 Wiring diagram �� 36

16.3 Fault conditions �� 37

16.4 Data table �� 38

16.5 Standardised output data �� 39

GUARANTEE

ENVIRONMENT AND RECYCLING

SPECIAL INfORmATION

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SPECIAL INfORmATION

- The appliance may be used by children over 8

years of age and persons with reduced physical,

sensory or mental capabilities or a lack of ex-

perience 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.

- Observe all applicable national and regional reg-

ulations and instructions.

- Observe the minimum clearances (see chap-

ter "Installation/ Preparations/ Siting the

appliance").

- Observe the requirements concerning the instal-

lation room (see "Speciﬁcation/ Data table").

- The appliance is supplied with a ﬂexible power

cable without plug. In the case of a permanent

connection, the appliance must be able to be sep-

arated from the power supply by an isolator that

disconnects all poles with at least 3mm contact

separation. Contactors, circuit breakers or fuses

can be used for this. This type of isolator must be

installed in the ﬁxed electrical installation accord-

ing to the regulations. For Australia: Ensure that

the appliance can be separated from the power

supply by a suitable isolator. Contactors, circuit

breakers, fuses or general purpose power plugs

can be used for this. This type of isolator must be

installed according to the electrical installation

regulations.

- Observe the safety measures to prevent contact

with dangerously high contact voltage.

- Observe the fuse protection required for the ap-

pliance (see chapter "Speciﬁcation/ Data table").

- If the power cable is faulty, replace it with a new

one. The power cable must only be replaced (for

example if damaged) by a qualiﬁed contractor.

- The appliance is pressurised. During the heat-up

process, expansion water will drip from the safety

valve.

- Activate the valves at least every 6months to pre-

vent them from becoming blocked, e.g. by limes-

cale deposits.

- Drain the appliance as described in chapter "In-

stallation/ Maintenance and cleaning/ Draining

the cylinder".

- A T&P valve or a cold water expansion control

valve, or both, must be installed. Observe all ap-

plicable national and regional regulations and

instructions.

- The maximum pressure in the cold water supply

line must be at least 20% below the lowest re-

sponse pressure of all installed safety valves. Oth-

erwise a pressure reducing valve is required. If

this is the case, install a pressure reducing valve

in the cold water supply line. The pressure reduc-

ing valve must be set to 540kPa if a safety valve

is installed; otherwise to 700kPa.

- Fit the drain pipe of the safety valve with a con-

stant fall in a room free from the risk of frost.

- Size the drain pipe so that water can drain off un-

impeded when the safety valve is fully opened.

- The safety valve drain aperture must remain open

to atmosphere.

OPERATION

General information

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OPERATION

1. General information

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

for both users 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 these

instructions to a new user if required.

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.

f 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

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-seri-

ous or minor injury.

1.2 Other symbols in this documentation

Note

General information is identiﬁed by the adjacent symbol.

f Read these texts carefully.

Symbol Meaning

Material losses

(appliance damage, consequential losses and environmen-

tal pollution)

Appliance disposal

f This symbol indicates that you have to do something. The ac-

tion you need to take is described step by step.

 These symbols show you the software menu level (in

this example level3).

1.3 Units of measurement

Note

All measurements are given in mm unless stated oth-

erwise.

2. Safety

2.1 Intended use

The purpose of this appliance is to heat domestic hot water within

the application limits stated in the chapter "Speciﬁcation/ Data

table".

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

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

mestic 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 inappro-

priate. Observation of these instructions and of the instructions

for any accessories used is also part of the correct use of this

appliance.

OPERATION

Safety

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2.2 General safety instructions

The appliance should only be operated once it is fully installed

and all safety equipment has been ﬁtted.

WARNING Injury

The appliance may be used by children over 8 years of

age and persons with reduced physical, sensory or men-

tal 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.

WARNING Electrocution

Contact with live components presents a threat to life.

Damage to the cable insulation or to individual compo-

nents may result in a risk to life.

f If there is damage to the insulation, switch off the

power supply and arrange a repair.

All work on the electrical installation must be carried

out by a qualiﬁed contractor.

WARNING Burns

The water in the DHW cylinder can be heated to temper-

atures in excess of 60°C. There is a risk of scalding at

outlet temperatures in excess of 43°C.

Caution must be exercised when coming into contact

with the outﬂowing water.

WARNING Burns

Touching hot components can lead to burns.

f When working on hot components, always wear

protective working clothing and safety gloves.

The pipework connected to the DHW outlet of the appli-

ance can reach temperatures in excess of 60°C.

WARNING Burns

The appliance is ﬁlled with refrigerant at the factory.

In the event of refrigerant escaping due to a leak, avoid

coming into contact with the refrigerant or inhaling the

released vapours. Ventilate the rooms affected.

WARNING Electrocution

Never operate the appliance when the casing is open or

without a cover.

CAUTION Injury

If objects are left on the appliance, noise emissions may

increase due to resulting vibrations, and the objects

could fall and cause injury.

f Never place any objects on top of the appliance.

Material losses

At the factory, the appliance is ﬁtted with rechargeable

batteries that ensure the power supply to the impressed

current anode in the case of a power failure.

In order for the impressed current anode to protect the

DHW cylinder in the appliance against corrosion, the ap-

pliance must not be disconnected from the power supply

for more than 16hours if the DHW cylinder is ﬁlled with

water and the impressed current anode is not separately

connected to a continuous power supply.

If regular interruptions to the power supply are not an-

ticipated, the batteries will not require any maintenance.

Replace the batteries for the impressed current anode

every three years in the following cases:

- The impressed current anode is not separately con-

nected to a continuous power supply and a switch-

ing contact regularly interrupts the power supply to

the appliance.

- The security of supply is inadequate.

Failure to observe this point puts the appliance at risk

of damage.

Never use batteries that cannot be charged. Only re-

chargeable nickel metal hydride batteries (NiMH) are

permissible.

Batteries may be damaged in the appliance. Without a

power supply, the impressed current anode and the cyl-

inder would not be protected against corrosion.

Material losses

Ensure that the appliance, water pipes and safety valves

are free from the risk of frost. If you disconnect the ap-

pliance from the power supply, it is no longer protected

against frost.

Material losses

Never cover the appliance. Covering the air intake or air

discharge leads to a reduced air supply. If the air supply

is restricted, the operational reliability of the appliance

cannot be guaranteed.

Material losses

Only operate the appliance when the DHW cylinder has

been ﬁlled. The appliance is equipped with boil-dry pro-

tection to prevent operation if the DHW cylinder is not

completely full of water.

Material losses

Heating liquids other than potable water is not permitted.

Material losses

Keep the appliance installation site free from air contam-

inated with oil or salt (chloride) and corrosive or explo-

sive substances. Avoid contaminating the installation site

with dust, hairspray or substances containing chlorine

or ammonia.

OPERATION

Appliance description

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Material losses

Operating the appliance outside the application limits

(see chapter "Speciﬁcation/ Data table") is not permitted.

The appliance may be damaged if operated continuously

outside the application limits.

Note

The appliance is pressurised. During the heat-up process,

expansion water will drip from the safety valve.

f If water continues to drip when heating is complet-

ed, please inform your qualiﬁed contractor.

2.3 Test symbols

See type plate on the appliance.

3. Appliance description

This appliance enables DHW to be supplied efﬁciently to several

draw-off points using renewable energy. The appliance extracts

heat from the ambient air. This heat is used, along with additional

electrical energy, to heat up the water in the DHW cylinder. The

amount of electrical energy and time required to heat up the DHW

depend on the temperature of the air drawn in and the tempera-

ture of the water in the cylinder. When the air intake temperature

drops, the heating output of the heat pump is reduced and the

heat-up time is extended.

In the case of indoor installation, the air inside the installation

room can be cooled by 1°C to 3°C due to heat extraction. The

appliance also extracts moisture from the air, which turns into

condensate. The condensate is removed from the appliance via

the condensate drain.

The appliance has an electronic control unit with LC display. The

display shows parameters of interest, such as the top hot water

temperature, mixed hot water volume, etc. It also indicates when

the unit is idle, heating or engaged in defrosting, as well as the

presence of errors and faults. Subject to the power supply and

your draw-off patterns, the water is heated automatically to the

selected set temperature.

External signal transmitters can be integrated via the built-in con-

tact input, e.g. a photovoltaic system to make use of solar power

generated on site.

When a DHW draw-off point is opened, the hot water is pushed

out of the appliance by the inﬂow of cold water.

The heat pump drive unit is located in the upper section of the

appliance. The DHW cylinder is located in the lower section of the

appliance. To protect against corrosion, the DHW cylinder is coated

internally with special enamel and is additionally equipped with

an impressed current anode.

Available amount of DHW

The appliance's nominal maximum available amount of DHW is

designed for the recommended number of users with average

user behaviour.

3.1 Heat pump operating principle

A closed circuit within the appliance contains refrigerant (see

"Speciﬁcation/ Data table"). This refrigerant evaporates at low

temperatures. In the evaporator, which extracts heat from the

air drawn in, the refrigerant changes from a liquid into a gas-

eous state. A compressor draws in the gaseous refrigerant and

compresses it. This increase in pressure raises the refrigerant

temperature. This requires electrical energy.

The energy (motor heat) is not lost, but reaches the downstream

condenser together with the compressed refrigerant. There, the

refrigerant transfers heat to the DHW cylinder. An expansion valve

then reduces the still prevalent pressure and the cyclical process

starts again.

3.2 DHW heating

D0000050335

1 Cylinder top sensor

2 Integral sensor

The appliance is equipped with two temperature sensors.

- The cylinder top sensor captures the water temperature in

the upper section of the cylinder.

- The integral sensor is a temperature sensor afﬁxed over the

entire cylinder height. The integral sensor determines the

average cylinder temperature.

The appliance display indicates the temperature in the upper sec-

tion of the cylinder, which is captured by the cylinder top sensor.

The appliance control unit uses the average cylinder temperature

captured by the integral sensor.

DHW heating is started when the available mixed water volume

decreases to the percentage of the maximum mixed water volume

set in the "Charge level" parameter.

The temperature captured by the cylinder top sensor may still

correspond to the set temperature.

OPERATION

Appliance description

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For information on the heat-up time, see chapter "Speciﬁcation".

The calculation of the available mixed water volume is based on

the average cylinder temperature. The mixed water volume is

only calculated if the water temperature in the upper section of

the cylinder is higher than 40°C.

DHW is normally heated by the heat pump of the appliance (see

chapter "Speciﬁcation/ Data table").

Note

If the appliance has been isolated from the power supply

during operation, the compressor will only restart after

the pressure inside the refrigerant circuit has been equal-

ised. Pressure equalisation can take several minutes.

WWK 222 H | WWK 302 H : Electric emergency/booster heater

When the temperature in the upper section of the DHW cylinder

drops 12K below the selected set temperature, the appliance

automatically switches on the electric emergency/booster heater.

When the temperature in the upper section of the DHW cylinder

rises 2K above the selected set temperature, the appliance switch-

es off the electric emergency/booster heater.

In the event of an appliance fault, the electric emergency/booster

heater can be activated in emergency heating mode, provided

a ﬂashing fault key is displayed. See chapter "Settings/ 'Rapid

heat-up' button/ Emergency heating mode".

In the event of a higher hot water demand on a single occasion,

use the "Rapid heat-up" button to activate the emergency/booster

heater manually for one-off heat-up in addition to the heat pump.

See chapter "Settings/ 'Rapid heat-up' button/ Rapid/comfort

heat-up".

3.3 Appliance operation outside the application

limits

f To guarantee fault-free operation of the appliance, make sure

you operate the appliance within its application limits (see

chapter "Speciﬁcation/ Data table").

3.3.1 Ambient temperatures below the application limit

Outside the application limits, the appliance blocks the compres-

sor from operating. This could lead to reduced DHW convenience.

If the appliance has an electric emergency/booster heater, the

appliance enables this when there is a demand for water heating

and the lower application limit has been undershot.

Low ambient temperatures may result in the formation of hoar

frost on the evaporator depending on the air humidity and water

temperature.

Active defrosting

The appliance is equipped with active hot gas defrosting, which

allows quick defrosting of the evaporator when needed. During

defrosting, the appliance fan is disabled. The compressor con-

tinues to run. A solenoid valve routes the hot gas directly to the

evaporator. While this is happening, refrigerant ﬂow to the con-

denser is disabled by another solenoid valve.

In contrast to conventional defrosting methods, the appliance

guarantees that this defrosting takes place only when needed.

Note

Heat-up times are longer while the evaporator is defrost-

ing.

3.3.2 Ambient temperatures above the application limit

Outside the application limits, the appliance blocks the compres-

sor. This could lead to reduced DHW convenience. If the appliance

has an electric emergency/booster heater, the appliance enables

this when there is a demand for water heating and the upper

application limit has been exceeded.

3.4 Frost protection

The appliance activates the frost protection function if the integral

sensor in the DHW cylinder captures a temperature below 8°C.

The appliance then heats the water by means of the heat pump

and the electric emergency/booster heater. The heat pump and

electric emergency/booster heater switch off when the tempera-

ture captured by the integral sensor reaches 16°C.

3.5 Minimum runtime and minimum pause time

Material losses

When operating with external switching devices that

can interrupt the power supply to the appliance, such

as time switches, energy management systems or home

automation systems, the following conditions must be

adhered to:

- The minimum ON time is 60 minutes.

- The minimum pause time following a shutdown is

20 minutes.

- The appliance should not be switched on/off more

than 10 times per day.

- The breaking capacity of the switching actuator must

meet the fuse protection requirements (see chapter

"Speciﬁcation/ Data table").

Material losses

If you disconnect the appliance from the power supply, it

is no longer protected against frost.

OPERATION

Settings

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Material losses

At the factory, the appliance is ﬁtted with rechargeable

batteries that ensure the power supply to the impressed

current anode in the case of a power failure.

In order for the impressed current anode to protect the

DHW cylinder in the appliance against corrosion, the ap-

pliance must not be disconnected from the power supply

for more than 16hours if the DHW cylinder is ﬁlled with

water and the impressed current anode is not separately

connected to a continuous power supply.

If regular interruptions to the power supply are not an-

ticipated, the batteries will not require any maintenance.

Replace the batteries for the impressed current anode

every three years in the following cases:

- The impressed current anode is not separately con-

nected to a continuous power supply and a switch-

ing contact regularly interrupts the power supply to

the appliance.

- The security of supply is inadequate.

Failure to observe this point puts the appliance at risk

of damage.

Never use batteries that cannot be charged. Only re-

chargeable nickel metal hydride batteries (NiMH) are

permissible.

Batteries may be damaged in the appliance. Without a

power supply, the impressed current anode and the cyl-

inder would not be protected against corrosion.

3.6 Connection of an external signal transmitter

Note

This type of connection must only be carried out by a

qualiﬁed electrician.

External signal transmitters can be integrated via the built-in

contact input, e.g. a PV system to take advantage of electricity

generated on site.

The appliance has a second set temperature preselected at the

factory. This is activated when there is an external switching sig-

nal. Set temperature2 takes priority over the standard set tem-

perature while there is an external switching signal. Following

a one-off activation (signal is present for at least 1minute), set

temperature2 applies for at least 20minutes and takes priority

over set temperature1.

You can change set temperature2 on the appliance (see chapter

"Settings/ Settings/ Set temperature2").

4. Settings

Material losses

Optimum operation is achieved with the factory default

settings.

Any changes to these are strongly discouraged as they

may affect output, service life and compliance with reg-

ulations.

4.1 Emergency shutdown

In the event of an emergency, carry out the following steps:

f Disconnect the appliance from the power supply at the fuse

in the domestic distribution board or by unplugging the

power plug.

f Shut off the cold water supply.

4.2 Weatherproof cover

The programming unit is equipped with a weatherproof cover to

protect it from the elements.

D0000093597

f Carefully ﬂip up the lid of the weatherproof cover.

Two detents are provided so that you do not have to keep hold

of the lid.

To close, carefully press the lid onto the appliance until the locking

tabs at the sides lock in place.

OPERATION

Settings

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4.3 Display and operating controls

Note

15seconds after every operation, the appliance automat-

ically reverts to the default display (mixed water volume)

and saves the set value.

D000003788

1 Mixed water volume display (litres|40°C)/

Display of actual temperature in upper cylinder section/

Set temperature display1/

Set temperature display2/

Fault code display

2 "Plus" button

3 "Minus" button

4 "Rapid heat-up" button

5 "Menu" button

Symbols

Symbol Description

Mixed water volume: The currently available mixed water volume at

40°C and at 15°C cold water temperature is shown.

Set temperature adjustment: Subject to intake temperature and

hot gas temperature, the appliance may temporarily reduce the set

temperature to the actual value captured by the integral sensor. The

appliance displays the "Set temperature adjustment" symbol and

blocks DHW heating until the actual temperature captured by the

integral sensor is 6K below the temporary set temperature. DHW

heating is then re-enabled and the originally selected set tempera-

ture is applied again.

Actual temperature: The current actual temperature is shown. The

actual temperature indicates the temperature in the upper section

of the DHW cylinder and therefore largely corresponds to the outlet

temperature.

Set temperature

External signal transmitter: Set temperature2 is the DHW tempera-

ture to which the appliance regulates if an external signal transmit-

ter is connected and active.

Standby: The symbol flashes if the appliance PCB and load (com-

pressor) are supplied with power separately. This connection option

is required if the appliance is to be operated via switchable sockets

in an energy management system, for example (see chapter "Electri-

cal connection").

Electric emergency/booster heater: This symbol indicates the pres-

ence of a demand on this component. This symbol being displayed

does not necessarily mean that the electric emergency/booster

heater is running.

Heat pump: This symbol indicates the presence of a demand on this

component. This symbol being displayed does not necessarily mean

that the compressor is running.

Defrost active

Service/fault: Notify your qualified contractor if the "Service/fault"

symbol appears on the display. Continuous illumination of the

symbol indicates that the fault is not preventing appliance opera-

tion. A flashing "Service/fault" symbol indicates that water is not

being heated and it is essential you notify your qualified contractor.

Switching the appliance to emergency mode is a special case. The

electric emergency/booster heater will then heat the water despite

the flashing "Service/fault" symbol.

The "Electric emergency/booster heater" and "Heat pump" sym-

bols are displayed when there is a demand for these appliance

components. These symbols being displayed does not necessarily

mean that the electric emergency/booster heater and the heat

pump are running. Example: The appliance is in rapid/comfort

heat-up mode. The electric emergency/booster heater switches off

when the temperature in the upper cylinder section has reached

65°C. The heat pump has not yet heated the lower section to 65°C

and the rapid/comfort heat-up function has therefore not been

terminated yet. The electric emergency/booster heater symbol is

displayed until the rapid/comfort heat-up function has terminated.

OPERATION

Settings

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4.4 Adjusting the settings

The default display shows the mixed water volume.

The "Menu" button allows you to call up

all information and adjustment options in

sequence. The relevant symbol appears.

 Menu

 Mixed water volume display

 Actual temperature display

 Set temperature 1

 Set temperature 2

 Fan speed

 Air intake temperature display

 Enable the “Runtime-dependent rapid

heat-up” function

In appliances with no electric

emergency/booster heater, this

parameter has no function.

 Time set for the “Runtime-dependent

rapid heat-up” function

In appliances with no electric

emergency/booster heater, this

parameter has no function.

 Change units

 Charge level

 Fault code

 E fault code

 Advanced menu (with service plug only)

 Integral sensor offset

 Set the cylinder volume

 Compressor lockout due to evaporator

fault

 Clear high pressure lockout

 Clear low pressure lockout

 Temperature of evaporator fins

 Number of times hot gas temperature

sensor was triggered

 Number of defrost faults

 Number of low pressure triggers

 Number of high pressure triggers

 Hot gas temperature switching value

 Fan lead time

 Integral sensor replacement

 Set value limit

Menu

 Mixed water volume display

The currently available mixed water

volume at 40°C and at 15°C cold water

temperature is shown.

"--L" is shown if less than 10l mixed

water is currently available.

DHW demand for Mixed water volume at 40°C

Bath 120-150 l

Shower 30-50l

Washing hands 2-5l

The mixed water volume that can be achieved depends on the

cylinder size and the set temperature selected.

 Actual temperature display

In the "Mixed water volume" menu, press

"Menu" once to access the "Actual tem-

perature" menu.

The "Actual temperature" symbol ap-

pears.

The current actual temperature is shown.

The actual temperature is the tempera-

ture in the upper section of the DHW cyl-

inder, and therefore largely corresponds

to the outlet temperature.

 Set temperature1

Note

For hygiene and other reasons, only change this value if

instructed by Stiebel Eltron representative..

Set temperature1 is the DHW temperature to which the appliance

regulates if no external signal transmitter is connected and active.

Factory setting

Set temperature 1 °C 61

In the "Actual temperature" menu, press

"Menu" once to access the "Set temper-

ature1" menu.

The set temperature1 symbol appears.

You can change the value using the "Plus"

and "Minus" buttons. Setting range: 61

- 65 °C

OPERATION

Settings

www.stiebel-eltron.com WWK222-302 H | 11

Note

Another way to adjust set temperature1 is to press the

"Plus" or "Minus" buttons from within the default display

(mixed water volume).

Frost protection

Only frost protection remains active if you

set the set temperature to below 20°C

using the "Minus" button. The display

shows "--°C".

 Set temperature2

Note

For hygiene reasons, do not set a DHW temperature of

less than 61°C.

Set temperature2 is the DHW temperature to which the appliance

regulates if an external signal transmitter is connected and active.

In the "Set temperature1" menu, press

"Menu" once to access the "Set tempera-

ture2" menu. The "External signal trans-

mitter" symbol appears.

You can change the value using the "Plus"

and "Minus" buttons. Setting range: 61

- 65 °C

Operation with external signal transmitter

Material losses

See "Permissible voltage range for external signal trans-

mitters" in chapter "Speciﬁcation/data table".

As standard, these appliances are designed to allow you to allo-

cate a separate, individual set DHW temperature to a connected

external signal transmitter, such as a PV system or an economy

tariff transmitter. This set temperature2 is activated if the termi-

nal connected to the external signal transmitter receives a signal

(see chapter "Electrical connection/ External signal transmitter

connection option"). While activated, set temperature2 replaces

the standard set DHW temperature ("Set temperature1").

 Air intake temperature display

An "A" appears as the air intake temper-

ature symbol.

The current air intake temperature is

displayed.

The air intake temperature is displayed

only while the appliance fan is running. If

it is not possible to establish an air intake

temperature, two dashes are shown.

 Enabling the "Runtime-dependent rapid heat-up" function

Note

In appliances with no electric emergency/booster heater,

this parameter has no function.

Note

Only use the runtime-dependent quick heat-up if instruct-

ed by a Stiebel Eltron representative.

Enabling this function is likely to impact the efﬁciency of

the product and may lead to unnecessary higher energy

consumption and operational costs.

The appliance offers a runtime-dependent rapid heat-up option.

If the selected set temperature is not reached by the heat pump

after a user deﬁned period, the appliance switches on the electric

emergency/booster heater in parallel to back up the heat pump

(subject to this function being enabled).

Once the set value has been reached, the electric emergency/

booster heater remains inactive until the set time has elapsed

again following a heat demand. This function is disabled at the

factory.

This function is set in two stages. First enable the function and set

the runtime in the second parameter.

The tHE0 setting disables the runtime-

dependent rapid heat-up function. This

function is enabled via setting tHE1. The

function is disabled at the factory.

Switch between the tHE0 and tHE1 set-

tings using the "Plus" and "Minus" but-

tons. The tHE1 setting allows the electric

emergency/booster heater to cut in if the

set temperature is not reached after expi-

ry of the runtime selected below.

OPERATION

Settings

12 | WWK222-302 H www.stiebel-eltron.com

 Time set for the "Runtime-dependent rapid heat-up"

function

Note

In appliances with no electric emergency/booster heater,

this parameter has no function.

To avoid increased power consumption, only reduce the facto-

ry-set time for runtime-dependent rapid heat-up if necessary. See

chapter "Speciﬁcation/ Appliance parameters".

Set the runtime using the "Plus" and

"Minus" buttons. After the set number of

hours, the appliance checks whether the

set temperature has been reached. If this

is not the case, the appliance switches on

the electric emergency/booster heater.

thE1

tE08

thE0

D0000052266

1 "Heat pump" symbol

2 "Electric emergency/booster heater" symbol

tHE0 Runtime-dependent rapid heat-up disabled

tHE1 Runtime-dependent rapid heat-up enabled

tE08 Adjustable number of hours (e.g. 8 in this case) during

which heating is only provided by the heat pump

 Change units

You can select whether the temperatures and the volume details

are displayed in SI units or US units. If you select 1, the values are

displayed in degrees Celsius and litres. If you select 0, the values

are displayed in degrees Fahrenheit and gallons.

Press the "Menu" button until "SI" ap-

pears on the display.

Using the "Plus" and "Minus" buttons, set

whether the display should use SI units

(1) or US units (0).

Charge level

Increasing this value increases the minimum available amount of

DHW. The effect corresponds to a virtual shift of the temperature

sensor downwards. This results in a faster recovery at the expense

of higher energy consumption and reduced efﬁciency. Reducing

this value has the opposite effect and results in a longer recovery

at the expense of DHW availability.

DHW heating is started when the available mixed water volume

decreases to the percentage of the maximum mixed water volume

set in the "Charge level" parameter.

Factory setting

Charge level WWK 222 (H) % 56

Charge level WWK 302 (H) % 64

The displayed mixed water volume is based on a mixed water

temperature of 40°C. At water temperatures below 40°C (±1K),

the mixed water volume is not calculated or displayed.

A further start condition, which overlaps with the charge level

start conditions, is the reduction of the temperature captured by

the cylinder top sensor to 6K below the active set temperature.

Press the "Menu" button until an "L" fol-

lowed by a number appears on the dis-

play.

You can change the value using the "Plus"

and "Minus" buttons. Setting range: 30

- 100 %

Material losses

Do not change this parameter unless instructed by a Stie-

bel Eltron representative.

 Fault code

If the "Service/fault" symbol is illuminat-

ed or ﬂashes, you can call up the fault

code using the "Menu" button. This menu

remains disabled if no fault has arisen.

See chapter "Troubleshooting/ Fault codes".

 E fault code

A fault code preceded by E appears if the fault relates to the re-

frigerant circuit.

OPERATION

Settings

www.stiebel-eltron.com WWK222-302 H | 13

4.5 "Rapid heat-up" button

Note

In appliances with no electric emergency/booster heater,

this button only allows you to clear the high pressure/low

pressure lockout. You cannot start rapid/comfort heat-up

or emergency heating mode.

Note

To start rapid/comfort heat-up with the "Rapid heat-up"

button, the start screen must be displayed.

Press the "Rapid heat-up" button for two

seconds.

The heat pump and electric emergency/

booster heater symbols appear.

4.5.1 Rapid/comfort heat-up

Normally, the "Rapid heat-up" button is used to activate the rapid/

comfort heat-up function, which enables you to cover an unex-

pectedly high DHW demand without changing any of the appli-

ance's standard settings.

If rapid/comfort heat-up is activated manually by pressing the rel-

evant button, the heat pump and the electric emergency/booster

heater will start once in parallel, irrespective of the selected set

temperature, and will remain active until the DHW temperature

in the cylinder has reached 65°C. To save energy, the electric

emergency/booster heater switches off sooner, once a temper-

ature of 65°C has been achieved in the upper cylinder section

(rapid heat-up).

The rapid/comfort heat-up function remains active until a tem-

perature of 65°C has been achieved in the entire DHW cylinder

(comfort heat-up). The appliance then automatically switches back

to the previously set parameters.

Note

The electric emergency/booster heater and heat pump

symbols are displayed until the rapid/comfort heat-up

function has terminated.

Note

To end rapid/comfort heat-up, press the "Rapid heat-up"

button for two seconds.

4.5.2 Emergency mode

If the appliance is faulty, you can use emergency mode to activate

the electric emergency/booster heater.

Following a DHW demand, the appliance measures the temper-

ature rise every 15minutes. If the temperature rise was <0.25°C

within the 15minute period, this is recorded by a counter. If the

temperature rise did not reach >0.25°C in any 15minute period

over 13hours, the compressor shuts down. The fault key ﬂashes

on the display and a fault code indicates that the appliance is not

heating the water.

Press the "Rapid heat-up" button for two

seconds.

The "Electrical emergency/booster heat-

er" symbol appears. The "Service/fault"

symbol ﬂashes.

After the "Rapid heat-up" button has been pressed, the indicated

fault code increments by a value of 256, as the fault codes are

added together (see fault code table in chapter "Troubleshooting").

The fault key continues to ﬂash. The electric emergency/booster

heater is activated.

The current set temperature (set temperature1 or set tempera-

ture2) is ignored.

In emergency heating mode, the appliance operates with a ﬁxed

set temperature. In the upper cylinder section, the DHW is heated

up to 65°C by the electric emergency/booster heater.

Following one-off enabling of this function by means of the "Rapid

heat-up" button, this function remains enabled for 7days.

Following 7days of emergency operation the electric emergency/

booster heater is disabled. The fault code shown on the display

decreases by256.

If you press the "Rapid heat-up" button again for two seconds

within the 7days of emergency heating mode, the 7-day runtime

for emergency heating mode will restart.

If the 7-day runtime for emergency heating mode has expired,

you can restart emergency heating mode for a further 7days by

pressing "Rapid heat-up".

Pressing the "Rapid heat-up" button only enables emergency

mode if a fault with fault code8 occurred previously. In standard

mode, pressing the "Rapid heat-up" button only triggers one-off

heat-up of the DHW cylinder.

Emergency mode is no longer active after an interruption to the

power supply. The appliance tries again to heat with the heat

pump.

You can avoid having to wait until the temperature increase time

has elapsed (see chapter "Speciﬁcation") by starting manual emer-

gency heating mode.

Manual emergency heating mode

If a fault has occurred and no fault code is displayed, you can

activate emergency heating mode.

Keep the "Plus" and "Minus" buttons

pressed. In addition, press the "Menu"

button and keep all three buttons pressed

for 5seconds.

The "Electrical emergency/booster heat-

er" symbol appears. The "Service/fault"

symbol ﬂashes.

OPERATION

Cleaning, care and maintenance

14 | WWK222-302 H www.stiebel-eltron.com

5. Cleaning, care and maintenance

WARNING Electrocution

- Only clean the exterior of the appliance.

- Never open the appliance.

- Do not insert objects through the grille into the in-

terior of the appliance.

- Never spray the appliance with water.

- Never spray water into the appliance.

WARNING Injury

Maintenance work, such as checking electrical safety,

must only be carried out by a qualiﬁed contractor.

Appliance

components

Care and maintenance tips

Casing Use a damp cloth to clean the casing sections. Never use

abrasive or corrosive cleaning agents.

Air intake

grille/ air dis-

charge grille

Clean the air intake grille and air discharge grille every six

months. Cobwebs or other dirt could obstruct the air supply to

the appliance.

DHW cylinder

The DHW cylinder is equipped with a maintenance-free im-

pressed current anode to protect it against corrosion. In order

for the impressed current anode to protect the DHW cylinder

in the appliance against corrosion, the appliance must not be

disconnected from the power supply for more than 16hours

if the DHW cylinder is filled with water and the impressed

current anode is not separately connected to a continuous

power supply.

Electric emer-

gency/booster

heater

Have the electric emergency/booster heater descaled from

time to time. This will extend the service life of the electric

emergency/booster heater.

Safety equip-

ment

Activate the valves at least every 6months to prevent them

from becoming blocked, e.g. by limescale deposits.

Evaporator Have the evaporator regularly checked by a qualified contrac-

tor.

Condensate

drain

Undo the condensate drain. Check that the condensate drain

is clear and remove any dirt from the "Condensate drain"

connection.

5.1 Protective anode and battery change

The appliance is equipped with a maintenance-free impressed

current anode that protects the cylinder from corrosion when it

is connected to the power supply. At the factory, the appliance is

ﬁtted with rechargeable batteries that ensure the power supply

to the impressed current anode in the case of a power failure.

The appliance power supply must not be interrupted for more

than 16hours.

If the power supply is regularly interrupted by a switching contact

or the security of supply is inadequate, the batteries of the im-

pressed current anode must be replaced every three years. Failure

to comply may result in damage to the appliance.

If regular interruptions to the power supply are not anticipated

and there is security of supply, no maintenance of the batteries

is required and the appliance is maintenance-free in this regard.

6. Troubleshooting

Problem Cause Remedy

No hot water

is available.

No power at the appliance. Check that the appliance is con-

nected to the power supply.

A fuse in the distribution board

has blown.

Check whether the fuses in your

distribution board have blown.

Contact a qualified contractor if

the fuse blows again after the

appliance is connected to the

power supply.

The air intake or air discharge

of the appliance is blocked.

Check the air intake grille and

air discharge grille for dirt.

Remove any dirt (see chapter

"Maintenance and care"). Ensure

that the supply and extract air

flow are unimpeded.

Outside the application lim-

its, the appliance blocks the

compressor. This could lead to

reduced DHW convenience.

No action required. The appli-

ance will restart the compressor

automatically within the appli-

cation limits.

The DHW cylinder is not com-

pletely filled.

The appliance restarts automati-

cally when the DHW cylinder has

been filled.

After DHW was drawn off pre-

viously, the appliance was not

able to fully heat up the cylin-

der content.

No action required. Let the ap-

pliance complete the heat-up

process.

The safety pressure limiter has

responded 5times in 5hours.

Notify a qualified contractor. The

appliance can only be unlocked

with a service programming

unit.

The com-

pressor is

operational,

but the fan

is off.

If the appliance is in defrost

mode, it may take up to an

hour for the fan to switch on

again.

No action required. However, if

this continues for more than one

hour, please consult a qualified

contractor.

A safety valve

is dripping.

The appliances are under

water mains pressure. During

the heat-up process, expan-

sion water drips from a safety

valve.

If water continues to drip when

heating is completed, please in-

form your qualified contractor.

The conden-

sate drain

drips.

The surface temperature of the

evaporator is lower than the

dew point temperature of the

ambient air. Condensate forms.

This is normal. No action re-

quired. The amount of conden-

sate depends on the humidity

level of the ambient air.

For indoor

installation:

The room

temperature

drops too

low.

Operation of the appliance can

cause the room temperature to

fall by 1 to 3°C. If the room tem-

perature falls by more than 5°C,

check the room size (see chapter

"Specification/ Data table").

Increasing the room size by

opening a door to another room

will remedy this.

The “Service/

fault” symbol

is continu-

ously illumi-

nated.

See chapter “Fault codes”.

Notify a qualified contractor.

A continuously illuminated

"Service/fault" symbol indicates

that a fault has occurred, but

the heat pump is heating nev-

ertheless.

The "Service/

fault" symbol

flashes and

the water

does not heat

up.

See chapter “Fault codes”.

It is imperative that you notify a

qualified contractor quickly. A

flashing "Service/fault" symbol

indicates that a fault has oc-

curred and the heat pump is no

longer heating.

The "Defrost"

symbol is

shown.

The appliance is in defrost

mode.

No action required.

The “Heat

pump”

symbol is

flashing.

There is a heat demand, but

the compressor is locked out.

No action required. The com-

pressor restarts automatically

after the compressor lockout

time has elapsed. The symbol

stops flashing automatically.

OPERATION

Troubleshooting

www.stiebel-eltron.com WWK222-302 H | 15

Problem Cause Remedy

The “Electric

emergency/

booster heat-

er” symbol is

flashing.

A temperature controller has

switched off the electric emer-

gency/booster heater during

rapid heat-up.

No action required. The appli-

ance continues the rapid heat-up

process using the heat pump.

The symbol stops flashing when

the controller re-enables the

electric emergency/booster

heater. The symbol goes out

when the temperature through-

out the DHW cylinder reaches

the set rapid heat-up temper-

ature.

The “Electric

emergency/

booster heat-

er” symbol

is illumi-

nated but

the electric

emergency/

booster

heater is not

operational.

The "Electric emergency/

booster heater" symbol is

illuminated when there is a

demand. The internal control-

ler of the electric emergency/

booster heater may have

ended electric heating. A pos-

sible cause may be a fault in

the electric emergency/booster

heater. A possible cause may

be that the high limit safety

cut-out has responded.

Have a qualified contractor

check whether the controller of

the electric emergency/boost-

er heater is set correctly. The

controller must be turned fully

anti-clockwise. Have a qualified

contractor check the high limit

safety cut-out.

Fault code

You can call up a fault code if the "Service/fault" symbol is ﬂashing

or continuously illuminated on the display.

Repeatedly press the "Menu" button until

the fault code is shown after set temper-

ature2.

Fault code appears

Fault description Remedy

Continu-

ously on

The cylinder top sensor is faulty. The

actual temperature display switch-

es from the cylinder top sensor to

the integral sensor. The appliance

continues to heat without any loss

of comfort. The mixed water volume

cannot be calculated and is displayed

as "- -".

Notify a qualified con-

tractor.

Continu-

ously on

The integral sensor is faulty. In the

event of a faulty integral sensor, the

integral sensor is set to the value

of the cylinder top sensor, and the

mixed water volume is calculated

using this value. The appliance con-

tinues to heat with a reduced start

hysteresis.

A mixed water volume is still cal-

culated, based on the assumption

that the cylinder top temperature is

reached throughout the DHW cyl-

inder.

Notify a qualified con-

tractor.

Flashing

The cylinder top sensor and the inte-

gral sensor are faulty. The appliance

no longer delivers heat.

Notify a qualified con-

tractor.

Fault description Remedy

Flashing

The appliance has ascertained that

the DHW cylinder has not been heat-

ed within the maximum temperature

increase time, despite there being a

demand.

You can temporarily

continue to use the

appliance by pressing

the "Rapid heat-up" key

to activate emergency

heating mode. See chap-

ter "Appliance descrip-

tion/ Emergency mode".

Continu-

ously on

A short circuit of the impressed

current anode has occurred or the

protective anode is faulty.

Immediately notify a

qualified contractor, as

the appliance is not pro-

tected against corrosion

if the impressed current

anode is faulty.

Flashing

The appliance is not being operated

with a completely filled DHW cylin-

der. The appliance is not heating.

Fill the DHW cylinder of

the appliance. The fault

code disappears and the

appliance starts.

The anode current is interrupted. The

appliance is not heating.

Notify a qualified con-

tractor.

Continu-

ously on

The defrost temperature has not yet

been reached after the maximum

defrost time has lapsed. The com-

pressor is faulty.

The fault is reset auto-

matically once the evap-

orator temperature has

risen to the defrost end

temperature.

Notify a qualified con-

tractor.

128

Continu-

ously on

There is no communication between

the controller and the programming

unit. The most recently selected set

values are active. The appliance con-

tinues to heat.

Notify a qualified con-

tractor.

256

Flashing

Manually activated emergency mode

(only electric emergency/booster

heater active)

See chapter "Appliance

description/ Emergency

mode".

512 Flashing A fault has occurred in the refrigerant

circuit.

Notify a qualified con-

tractor.

If several faults occur, the fault codes are added together.

Example: If both the cylinder top sensor and the integral sensor

are faulty, the display shows fault code6 (=2+4).

Application scenarios for emergency heating mode

If the appliance shows fault code8, you can manually enable

emergency heating mode. If a different fault occurred previously,

but did not cause the appliance to shut down, the display may

show a fault code that is the result of several faults added together.

Listed below are the fault codes which will allow you to enable

emergency heating mode.

Fault code displayed

8 8

10 Fault code 8 + fault code 2

12 8+4

24 8+16

26 8+2+16

28 8+4+16

138 8+2+128

140 8+4+128

152 8+16+128

154 8+2+16+128

156 8+4+16+128

When the appliance is operating in emergency heating mode, the

fault code shown is incremented by 256.

OPERATION

Troubleshooting

16 | WWK222-302 H www.stiebel-eltron.com

E fault code

Fault description Remedy

E 1 Flashing The temperature sensor on the

air inlet is faulty.

Notify a qualified contractor.

E 2 Flashing The temperature sensor on the

evaporator is faulty.

Notify a qualified contractor.

E 4

Continu-

ously on

The hot gas temperature sensor

is faulty. The appliance con-

tinues to heat. To protect the

appliance, the (possibly higher)

set temperature is reduced to

the set value for setback.

Notify a qualified contractor.

E 16

Continu-

ously on

The high pressure switch has

responded. Compressor heating

mode is temporarily blocked.

Compressor heating mode will

continue as soon as the pres-

sure has normalised.

Wait until the pressure has

normalised.

E 32 Continu-

ously on

An electrical fault has occurred. Notify a qualified contractor.

E 64 Flashing Evaporator temperature < Mini-

mum evaporator temperature

Notify a qualified contractor.

E 128

Flashing

A permanent pressure switch

fault has occurred. A pressure

fault occurred multiple times

within a defined pressure fault

evaluation time.

Notify a qualified contractor.

Notifying a qualiﬁed contractor

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

Australia, contact us directly (1800153351). To facilitate and speed

up your enquiry, please provide the serial number from the type

plate (000000-0000-000000). The type plate can be found on the

left, above the "DHW outlet" connection.

Sample type plate

000000-0000-000000

D0000035352

1 Number on the type plate

INSTALLATION

Safety

www.stiebel-eltron.com WWK222-302 H | 17

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.

7.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations

and instructions.

Note

The installation of this appliance shall conform to the

Plumbing Code of Australia (PCA), and the New Zealand

Building Code.

Take note of the appliance type plate and chapter "Speciﬁcation".

8. Appliance description

8.1 Standard delivery

Note

The accessories are located in the corners of the pack-

aging. Remove the accessories before disposing of the

packaging.

D0000061574

1 Corners of the packaging

The following are delivered with the appliance:

- Condensate drain bend

- 2 straight pipe adaptors from G1 to G3/4

- T&P valve G1/2

- Reducer from R3/4 male thread to G1/2 female thread

8.2 Required accessories

Various safety assemblies are available that need to be selected

subject to the static pressure. These type-tested safety assemblies

protect the appliance against unacceptable excess pressure.

For Australia: Various safety assemblies are available to protect

the appliance against unacceptable excess pressure and limit the

DHW outlet temperature.

8.3 Additional accessories

- Condensate pump (if the condensate cannot be drained off

with a naturally occurring fall)

8.4 Incorrect use

The following are not permitted:

- Operating the appliance when the casing is open

- Filling the appliance with a refrigerant other than the one

detailed in chapter "Speciﬁcation/ Data table"

- Heating liquids other than potable water

Observe the list of requirements regarding the installation room

and non-permissible installation sites (see chapter "Installation

site").

9. Preparation

9.1 Transport

CAUTION Injury

f Observe the weight of the appliance.

f Use suitable transport aids (e.g. sack truck) and

enough personnel for transportation.

Material losses

The appliance has a high centre of gravity and low over-

turning moment.

f Safeguard the appliance against falling over.

f Only set the appliance down on an even base.

Material losses

The appliance casing is not designed to withstand strong

forces. Incorrect handling can lead to material losses of

considerable extent.

f Observe the information on the packaging.

Only remove the packaging shortly before installation.

Where possible, do not unpack the appliance until it has arrived

in the installation room.

For transport and handling leave the appliance in its packaging

and on the pallet. This enables brief horizontal transport and pro-

vides places to hold on to during transport.

If the appliance has to be unpacked before transportation, we

recommend using a sack truck. Pad the contact surfaces to avoid

damaging the appliance. Secure the appliance using a strap. Pad

the areas between the strap and the appliance, and avoid over-

tightening the strap. Where stairwells are narrow, you can carry

the appliance by the handles on the sack truck or trolley and the

foot of the appliance.

INSTALLATION

Preparation

18 | WWK222-302 H www.stiebel-eltron.com

Vehicular transport

Material losses

The appliance must generally be stored and transported

vertically.

On tarmac, asphalt, bitumen or otherwise paved roads you may

transport the appliance horizontally over a maximum distance of

160km. Strong shocks are not permissible.

Material losses

If transported horizontally, the appliance must always be

laid on the shaded side of the box.

The appliance must not remain in a horizontal position

for more than 24hours.

If the appliance was transported horizontally, leave it to

rest in a vertical position for at least one hour before

commissioning.

f Observe the information on the packaging.

D0000034797

1 Recessed grips

Transport from vehicle to installation room

The cardboard box has reinforced handholds (recessed grips). You

can use these recessed grips, as well as the pallet at the lower

end, to carry the appliance into the installation room. Take note

of the weight of the appliance and ensure sufﬁcient personnel

are available.

9.2 Storage

If it is necessary to store the appliance for a prolonged period

before installation, observe the following information:

- Only store the appliance in a vertical position. Never store

the appliance horizontally.

- Store the appliance in a location that is dry and largely

dust-free.

- Protect the appliance from coming into contact with aggres-

sive substances.

- Ensure the appliance is not subjected to shocks or vibrations.

9.3 Installation site

Material losses

Observe the following list of requirements regarding the

installation site.

- Install the appliance where it will be exposed as little as pos-

sible to strong direct wind, extreme rain, sun or snow, but

will still be well ventilated. Unhindered air intake and air dis-

charge must be possible. If necessary, protect the appliance

against the elements with a canopy, base and deﬂectors.

- The installation site must be free from ﬂammable, highly

combustible gases and substances, as well as high levels of

dust.

- The application limits for the heat pump and DHW cylinder

must be maintained (see chapter "Speciﬁcation/ Data table").

- The substrate of the installation site must be level and have

sufﬁcient load bearing capacity. Take note of the weight of

the appliance with a full DHW cylinder (see chapter "Speci-

ﬁcation/ Data table"). A ﬂoor with insufﬁcient load bearing

capacity is in danger of collapse. If the appliance is not level,

there may be a risk of appliance damage.

- In the case of indoor installation, the size of the installation

room must correspond to the application limits of the appli-

ance (see chapter "Speciﬁcation/ Data table").

- Observe the safety clearances and protection zones.

- Always leave sufﬁcient space to provide access for installa-

tion, maintenance and cleaning. Observe the minimum clear-

ances (see "Preparations/ Siting the appliance"). Otherwise,

the energy efﬁency may decrease and the service life may be

reduced.

- Never install the appliance in locations with aggressive at-

mospheres. Never draw off supply air from locations with

aggressive atmospheres. This may damage the appliance.

- Check for anything which may have adverse effects on the in-

stallation site or the air supply. This can decrease the energy

efﬁciency and reduce the service life, for example.

- Never install the appliance in close proximity to outdoor air

conditioning units. This can damage the fan, the compressor

or the evaporator, for example.

- Ensure the operation of other equipment in the installation

room is not impaired.

- To keep the water pipe lengths as short as possible, we

recommend installing the appliance close to the kitchen or

bathrooms.

- To prevent adverse effects from operating noise, do not in-

stall the appliance close to bedrooms.

INSTALLATION

Preparation

www.stiebel-eltron.com WWK222-302 H | 19

Examples of unacceptable

installations

Atmospheres containing am-

monia

Sewage works, pigsties

Substances which block the

evaporator

Air containing oil or fat, dust (cement, flour,

etc.). Note: If the air contains hairspray

(e.g. in hairdressing salons), the appliance

should be operated with shorter mainte-

nance intervals.

Saline environments Coastal installations (<200m from the

coast) can reduce component service life.

Atmospheres containing chlorine

or chloride

Swimming pools, salt works

Atmospheres containing thermal

water

Formaldehyde in the atmos-

phere

Certain wood-based materials (e.g. OSB

boards)

Certain insulating materials (e.g. foams

based on urea-formaldehyde (UF in-situ

foams))

Carboxylic acid in the atmos-

phere

Extract air from kitchens

Components of floor cleaners (e.g. vinegar

cleaner)

Air polluted with these substances can cause corrosion of copper

materials in the refrigerant circuit, especially the evaporator. This

corrosion can lead to failure of the appliance. Any damage to

the appliance caused in this way is not covered by the guarantee

conditions.

Note

The appliance output data is calculated according to the

relevant standards, using the intake temperature speci-

ﬁed in the data table. Below this temperature the appli-

ance efﬁciency and output decrease. The heat-up time

is extended.

Note

You can improve the efﬁciency of the appliance by utilis-

ing the waste heat from other appliances to heat the DHW

cylinder, e.g. boilers, tumble dryers or freezers.

If, for example, a tumble dryer releases dust at the in-

stallation site, the evaporator must be cleaned more

frequently.

Sound emissions

The sound emissions are louder on the air intake and air discharge

sides of the appliance than on the closed sides.

f Do not direct the air intake or air discharge towards

noise-sensitive rooms of the house, e.g. bedrooms.

Note

For details on sounds emissions, see chapter "Speciﬁca-

tion/ Data table".

9.4 Siting the appliance

f Carefully undo the cardboard packaging at the clips.

D0000034797

1 Cardboard packaging clips

The appliance is secured to the pallet with metal brackets and

screws. The metal brackets are hooked onto the feet underneath

the ﬂoor plate of the appliance.

D0000034798

1 Metal bracket ﬁxing screw

f Remove the ﬁxing screws of the metal brackets from the

pallet.

f Push the metal brackets a little towards the cylinder centre to

unhook them from the appliance feet.

f Pull the metal brackets out from underneath the appliance.

Material losses

Take note of the appliance's weight and centre of gravity.

f Slightly tip the appliance and carefully roll the appliance off

the pallet.

f Position the appliance in the ﬁnal installation site.

INSTALLATION

Installation

20 | WWK222-302 H www.stiebel-eltron.com

Material losses

The appliance must be positioned vertically to avoid

damage.

The appliance has height-adjustable feet below its base.

f Level the appliance horizontally using the height-ad-

justable feet.

D0000039043

9.4.1 Minimum clearances

f Maintain the minimum clearances.

≥150

≥350

≥400

≥500

D0000029620

10. Installation

WARNING Injury

Incorrect installation can lead to serious injury or ma-

terial losses.

Before any work, ensure sufﬁcient clearances for instal-

lation.

Handle sharp-edged components carefully.

10.1 Water connection

Material losses

Carry out all water connection and installation work in

accordance with regulations.

Material losses

The corrosion protection provided by the anode can only

be guaranteed when the electrical conductivity of the

potable water is within the limits stated in chapter "Spec-

iﬁcation/ Data table".

Cold water line

Galvanised steel, stainless steel, copper and plastic are approved

materials.

A safety valve is required.

DHW line

Stainless steel, copper and plastic pipework are approved.

Material losses

When using plastic pipework, observe the manufacturer's

data and chapter "Speciﬁcation/ Fault conditions".

f Thoroughly ﬂush the pipework before connecting the appli-

ance. Foreign bodies, such as abraded plastic or metal, rust,

sand or sealant can impair the operational reliability of the

appliance.

Material losses

To protect the connections against corrosion, the water

connection must be made with ﬂat gaskets. The use of

hemp on connections is not permissible.

INSTALLATION

Installation

www.stiebel-eltron.com WWK222-302 H | 21

c06

c01

D0000110400

f Connect the adaptor that is part of the standard delivery,

with the gaskets supplied, to cold water inletc01 and DHW

outletc06.

f Check the screw ﬁtting for tightness.

DHW circulation

DHW circulation is not permissible.

10.1.1 Safety equipment

A T&P valve or a cold water expansion control valve, or both, must

be installed. Observe local and regional regulations.

T&P valve ( 850 kPa )

D0000063547

1 2

1 T&P valve

2 Reducer from R3/4 male thread to Rp1/2 female thread

f If speciﬁed, install a type-tested T&P valve with reducer at

the "T&P valve" connection provided on the appliance.

The response pressure of the valve must be below or equal to the

permissible operating pressure of the DHW cylinder. The valve

protects the appliance against unacceptable excess pressure or

temperature. The diameter of the cold water supply line must not

be greater than the diameter of the valve.

f Ensure that the expansion water escaping from the valve can

drip into a drain, e.g. a funnel or tundish.

Ensure the drain cannot be shut off.

f Size the drain pipe so that water can drain off unimpeded

when the safety valve is fully opened.

f Ensure that the drain pipe of the safety valve is open to the

outside.

f Fit the drain pipe of the safety valve with a constant down-

ward slope and in a location free from the risk of frost.

Safety valve (cold water expansion control valve)

f If speciﬁed, install a type-tested 700kPa safety valve (expan-

sion control valve) in the cold water supply line.

The safety valve protects the appliance against unacceptable ex-

cess pressure. The diameter of the cold water supply line must not

be greater than the diameter of the safety valve.

f Ensure that the expansion water escaping from the safety

valve can drip into a drain, e.g. a tank or funnel.

Ensure the drain cannot be shut off.

f Size the drain pipe so that water can drain off unimpeded

when the safety valve is fully opened.

f Ensure that the drain pipe of the safety valve is open to the

outside.

f Fit the drain pipe of the safety valve with a constant fall in a

room free from the risk of frost.

10.1.2 Pressure reducing valve

The maximum pressure in the cold water supply line must be at

least 20% below the lowest response pressure of all installed T&P

valves. Otherwise a pressure reducing valve is required. If this is

the case, install a pressure reducing valve in the cold water supply

line. The pressure reducing valve must be set to 540kPa if a safety

valve is installed; otherwise to 700kPa.

10.1.3 Drain valve

f Install a suitable drain valve at the lowest point in the cold

water supply line.

10.1.4 Thermal insulation

f Insulate the DHW line and valves against heat loss and to im-

prove energy efﬁciency in accordance with locally applicable

regulations.

f Insulate the cold water supply line to prevent condensate

forming.

10.1.5 DHW outlet

WARNING Burns

The water in the DHW cylinder can be heated to temper-

atures in excess of 60°C. There is a risk of scalding at

outlet temperatures in excess of 43°C.

f Install a temperature limiter in all systems intended

for personal hygiene, e.g. balancing valve, thermo-

static mixing valve.

10.2 Condensate drain

Install a condensate drain hose in order to remove the condensate

which forms.

f Connect the condensate drain bend included in the standard

delivery to the "Condensate drain" connection.

INSTALLATION

Installation

22 | WWK222-302 H www.stiebel-eltron.com

f Connect a condensate drain hose to the condensate drain

bend.

A siphon must be installed to prevent aggressive gases from the

sewer entering the appliance. The condensate drain must be in-

stalled with an outlet that opens freely above the siphon.

Material losses

Ensure condensate cannot back up.

f Use a condensate drain hose with a diameter great-

er than the diameter of the condensate drain bend.

f Ensure the condensate drain hose is not kinked.

f Route the condensate drain hose with a continuous

fall.

The condensate drain must be open to atmosphere.

f Use a suitable condensate pump if there is insufﬁcient fall.

Take the building characteristics into account.

Condensate pan heater

Material losses

If the temperature at the installation site could continu-

ously fall below freezing (1-2 days) you should install

a condensate pan heater. The condensate pan heater is

not part of the standard delivery.

When the compressor is running, install a load-dependent relay

to switch on the condensate pan heater after a delay.

The condensate pan heater must have an external power supply.

10.3 Electrical connection

WARNING Electrocution

The appliance is supplied with a ﬂexible power cable

without plug. In the case of a permanent connection,

the appliance must be able to be separated from the

power supply by an isolator that disconnects all poles

with at least 3mm contact separation. Contactors, circuit

breakers or fuses can be used for this. This type of iso-

lator must be installed in the ﬁxed electrical installation

according to the regulations.

For Australia: Ensure that the appliance can be separated

from the power supply by a suitable isolator. Contac-

tors, circuit breakers, fuses or general purpose power

plugs can be used for this. This type of isolator must be

installed according to the electrical installation regu-

lations.

WARNING Electrocution

Carry out all electrical connection and installation work

in accordance with national and regional regulations.

WARNING Electrocution

Ensure that the appliance is connected to the earth con-

ductor.

WARNING Electrocution

Observe the safety measures to prevent contact with

dangerously high contact voltage.

WARNING Electrocution

Coming into contact with live components presents a

threat to life. Disconnect the appliance from the power

supply before carrying out work on its interior. Prevent

the power supply from being switched on while you are

working on the system.

WARNING Electrocution

Insufﬁcient earthing can lead to electrocution. Ensure

the appliance is earthed according to locally applicable

requirements.

WARNING Electrocution

If the power cable is faulty, replace it with a new one.

The power cable should only be replaced by a qualiﬁed

contractor.

Material losses

Install a residual current device (RCD).

Material losses

The speciﬁed voltage must match the mains voltage. Ob-

serve the type plate.

Material losses

Observe the fuse protection required for the appliance

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

Material losses

Never connect the appliance to the power supply before

the DHW cylinder is ﬁlled.

The appliance is supplied with a ﬂexible power cable without plug.

f If the power cable is not long enough, you may disconnect it

from the appliance and replace it with a longer, more suita-

ble cable. Alternatively, you may extend the cable as permit-

ted by regional and national regulations (e.g. with the use of

a junction box).

f When routing the new power cable, ensure waterprooﬁng

where it passes through the existing cable grommet. Connect

the cable properly inside the appliance.

10.3.1 Standard connection (without external signal transmitter)

GNYE

D0000050560

BN Brown

BU Blue

GNYE Green/yellow

INSTALLATION

Installation

www.stiebel-eltron.com WWK222-302 H | 23

10.3.2 Separate power supply to the impressed current anode

At the factory, the appliance is ﬁtted with rechargeable batteries

that ensure the power supply to the impressed current anode in

the case of a power failure. If regular interruptions to the power

supply are not anticipated, the batteries will not require any main-

tenance.

The rechargeable batteries for the impressed current anode must

be replaced every three years in the following cases:

- The impressed current anode is not separately connected to

a continuous power supply and a switching contact regularly

interrupts the power supply to the appliance.

- The security of supply is inadequate.

Failure to observe this point puts the appliance at risk of damage.

Replacing the batteries can be avoided by connecting the im-

pressed current anode separately to a continuous power supply.

This means the DHW cylinder continues to be protected against

corrosion if the rest of the appliance is switched off, e.g. by a

controlled power supply.

f Remove the appliance cover (see chapter "Cleaning and

maintenance/ Removing the appliance cover").

D0000056083

1 Strain relief

2 Terminal X0

f Prepare the cables in such a way that each cable terminates

with a wire ferrule.

f Push the cables through one of the cable entries in the appli-

ance casing.

f Route the cables through the strain relief.

f Remove the jumper which leads from X0/N to X0/2 in the de-

livered condition.

f Remove the jumper which leads from X0/L to X0/1 in the de-

livered condition.

GNYE

L1 / L2 / L3

D0000059152

A Power supply provided by power supply utility or energy

management system for switching the load (compressor)

B Power supply to impressed current anode and PCB

BN Brown

BU Blue

GNYE Green/yellow

f Connect the cables for the separate power supply to the im-

pressed current anode to X0/1 and X0/2.

Material losses

The power supply to the impressed current anode must

be ensured at all times.

10.3.3 Connection with external signal transmitter

Note

The appliance has a second, higher set temperature

which is preset at the factory. This is activated when there

is an external switching signal. Set temperature2 takes

priority over the standard set temperature while there is

an external switching signal.

An external signal transmitter for switching a separate set DHW

temperature (set temperature2) can be connected to terminal

X3/1-2. In the delivered condition, terminal X3/1-2 is not assigned.

If this terminal is connected at the voltage stated in the speciﬁca-

tion (see "Permissible voltage range, external signal transmitter")

(L to X3/1, N to X3/2), the appliance activates set temperature2.

Following a one-off activation (signal is present for at least 1min-

ute), set temperature2 applies for at least 20minutes. Set temper-

ature2 takes priority over set temperature1. When the relevant set

DHW temperature has been reached, the compressor switches off

and remains off for a minimum idle time of 20minutes.

The following diagram illustrates the connections by means of a

sample signal sequence from an external signal transmitter.

Example:

- Water temperature = 62 °C

- Set temperature1 = 61 °C

- Set temperature2 = 65 °C

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 t [min]

0 2

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 t [min]

D0000034613

A External signal

B Compressor

1 20 min. minimum runtime, set temperature2

2 20 min. minimum compressor idle time

Note

An external signal must be present for at least 60seconds

before the control unit responds to it. For example, this

will prevent a brief burst of sunshine from triggering a

heat-up process which, in the absence of further sun-

light, can no longer be covered using locally generated

PV power.

f Remove the appliance cover (see chapter "Cleaning and

maintenance/ Removing the appliance cover").

INSTALLATION

Installation

24 | WWK222-302 H www.stiebel-eltron.com

D0000056083

1 Strain relief

2 Terminal X3

f Prepare the cables in such a way that each cable terminates

with a wire ferrule.

f Push the cables through one of the cable entries in the appli-

ance casing.

f Route the cables through the strain relief.

f Connect the cables to X3.

Example 1: Power supply utility signal with its own phase

GNYE

L1 / L2 / L3

EVU

D0000059154

EVU Power supply utility

BN Brown

BU Blue

GNYE Green/yellow

Example 2: Photovoltaic signal via on-site relay and phase

routed outside the appliance

Note

The relay in the inverter must meet the following re-

quirements:

- Potential-free relay (240VAC / 24VDC, 1A) with

N/O contact

- Adherence to safety regulations and standards for

safety extra low voltage

- The switching output must be able to be pro-

grammed such that the relay contact closes or opens

if certain limits are exceeded or undershot (inverter

output level).

If necessary, check with the inverter manufacturer wheth-

er the product meets the stated criteria.

GNYE

D0000059155

1 Inverter (ﬂoating contact)

BN Brown

BU Blue

GNYE Green/yellow

The inverter power feed is usually located at a central distribution

point (e.g. in the main fuse box).

10.4 Assembling the appliance

Note

Reﬁt the appliance cover after completing your work. See

chapter "Maintenance and cleaning/ Fitting the appliance

cover").

INSTALLATION

Commissioning

www.stiebel-eltron.com WWK222-302 H | 25

11. Commissioning

WARNING Electrocution

Never operate the appliance when the casing is open or

without a cover.

11.1 Initial start-up

Note

Fill the DHW cylinder before switching on the power sup-

ply to the appliance.

The appliance is equipped with boil-dry protection to

prevent operation if the DHW cylinder is not completely

full of water.

Note

Following an interruption to the power supply, compres-

sor operation remains blocked for at least one minute.

The PCB delays the electrical start-up by one minute,

during which the appliance initialises. If the compres-

sor subsequently fails to start, it may be locked out by

additional safety devices (motor overload relay and high

pressure switch). This lockout should be cleared after 1

to 10 minutes.

11.1.1 Filling the DHW cylinder

Fill the DHW cylinder and vent the pipework by following the

procedure below:

f Close the drain valve.

f Open all DHW draw-off points and the shut-off valve in the

cold water supply.

f Close the DHW draw-off points as soon as water comes out

of them.

f Check the safety valve by leaving it open until water runs out.

11.1.2 Settings / function check

f Switch the power supply ON.

f Check the appliance function.

f Check the function of the safety assembly.

After completing the function check, reducing the set DHW tem-

perature helps to save energy.

f Establish the customer's comfort requirements and adjust

the set DHW temperature accordingly. For hygiene reasons,

do not set a DHW temperature of less than 61°C (see section

"Set temperature1" on page10 and "Set temperature2" on

page10). Also ensure compliance with the legislation in force

at the installation location.

11.1.3 Appliance handover

f Explain the appliance function to users and familiarise them

with how it works.

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

scalding.

f Make users aware of critical environmental factors and re-

quirements concerning the installation site.

f Inform users that water may drip from the safety valve dur-

ing the heat-up process.

f Please note that the appliance is not protected against frost

and corrosion when it is disconnected from the power sup-

ply. At the factory, the appliance is ﬁtted with rechargeable

batteries that ensure the power supply to the impressed cur-

rent anode in the case of a power failure. The batteries must

be replaced every three years if the power supply is regularly

interrupted by a switching contact or if there is inadequate

security of supply. We recommend a maintenance contract

for replacing the batteries.

f Hand over these operating and installation instructions to

users for safekeeping.

11.2 Recommissioning

Note

Following an interruption to the power supply, compres-

sor operation remains blocked for at least one minute.

The PCB delays the electrical start-up by one minute,

during which the appliance initialises.

If the compressor subsequently fails to start, it may be

locked out by additional safety devices (motor overload

relay and high pressure switch). This lockout should be

cleared after 1 to 10 minutes.

If the appliance is switched off due to an interruption to the power

supply, no speciﬁc measures for restarting are required once the

power supply has been restored.

If the "Rapid/comfort heat-up" function was active before the

power supply interruption, it is re-enabled with a set temperature

of 65°C once the power supply has been restored.

Emergency mode is not reactivated after an interruption to the

power supply.

INSTALLATION

Settings

26 | WWK222-302 H www.stiebel-eltron.com

12. Settings

Service menu

Material losses

Service menu settings shall only be accessed with prior

approval from Stiebel Eltron.

To unlock the service menu, you need to connect a service plug

or enter a code.

Accessing the service menu with a service plug

D0000060217

1 Slot X1

f Plug the service plug into slot X1 on the back of the program-

ming unit.

Accessing the service menu by entering a code

Press the "Menu" button for longer than

3s. The software version number of the

controller PCB appears.

Display Version number

301 3.1.00

To display the software version number

of the programming unit PCB, press the

"Plus" button.

Display Version number

-103 1.3.00

To go to code entry, press the "Minus"

button.

To go from the software version num-

ber of the controller PCB directly to code

entry, press the "Minus" button.

To go to the code digit check, press the

"Rapid heat-up" button. The currently

active digit ﬂashes.

Set the ﬁrst digit using the "Plus" and

"Minus" buttons.

To set the next digit, press the "Rapid

heat-up" button.

To conﬁrm the code after entering all

digits, press the "Rapid heat-up" but-

ton.

 Service menu

 Integral sensor offset

 Set the cylinder volume

 Compressor lockout due to evaporator fault

 Clear high pressure lockout

 Clear low pressure lockout

 Temperature of evaporator fins

 Number of times hot gas temperature sensor was triggered

 Number of defrost faults

 Number of low pressure triggers

 Number of high pressure triggers

 Hot gas temperature switching value

 Fan lead time

 Integral sensor replacement

 Set value limit

The parameters in this menu are reserved for qualiﬁed contrac-

tors.

 Integral sensor offset

You can manually calibrate the integral sensor with the value set.

This should only be done after the DHW cylinder has been fully

heated up, without any DHW being drawn-off.

Example: The conﬁgured, active set temperature is 55°C. The

integral sensor of the appliance checks when the set temperature

is reached. If the compressor switches off after heat-up, check the

actual temperature (detected by the cylinder top sensor) using the

programming unit. If the actual temperature is 60°C, for example,

set the integral sensor offset to 5K.

Cylinder top sensor temperature = integral sensor temperature

+ offset

Press the "Menu" button until "lo" ap-

pears on the display.

You can change the value using the "Plus"

and "Minus" buttons. Setting range: -5 - 5

 Set the cylinder volume

The cylinder size is required for accurate calculation of the mixed

water volume. You can switch the cylinder size between 200 and

300l using the "Plus" and "Minus" buttons.

If the PCB has been replaced, you will need to set the cylinder size.

If you see the value 9999 in the cylinder size parameter, you must

select a suitable cylinder size for the appliance.

INSTALLATION

Settings

www.stiebel-eltron.com WWK222-302 H | 27

 Compressor lockout due to evaporator fault

This menu item is only displayed if there is a compressor lockout

due to fault code E 64. You can clear the lockout by pressing the

"Rapid heat-up" button or performing a power ON reset.

 Clear high pressure lockout

The appliance will be locked out if the high pressure sensor re-

sponds 5 times within 5 hours.

To clear the high pressure lockout, press

the "Rapid heat-up" button.

 Clear low pressure lockout

The appliance will be locked out if the low pressure sensor re-

sponds 5 times within 5 hours. This menu item allows you to clear

the lockout.

Note

Currently appliances are built without low pressure sen-

sors.

f If this lockout arises, check the jumper on the PCB (X0/L –

X1/6 – A1/X2/ND).

To clear the low pressure lockout, press

the "Rapid heat-up" button.

 Temperature of evaporator ﬁns

The temperature measured by a sensor

on the evaporator ﬁns is displayed here.

 Number of times hot gas temperature sensor was

triggered

The counter indicates how often the hot gas temperature has ex-

ceeded the set hot gas temperature switching value during heat-

up.

To reset the counter to 0, press the "Rapid

heat-up" button.

 Number of defrost faults

The number of defrost faults is displayed here. A defrost fault

occurs if the temperature for terminating defrosting, as measured

at the temperature sensor between the evaporator ﬁns, has not

been reached within the speciﬁed time frame.

To reset the counter to 0, press the "Rapid

heat-up" button.

 Number of low pressure triggers

To reset the counter to 0, press the "Rapid

heat-up" button.

 Number of high pressure triggers

To reset the counter to 0, press the "Rapid

heat-up" button.

 Hot gas temperature switching value

Material losses

Factory default setting: 105 °C

Only a service technician is permitted to change his pa-

rameter in line with factory instructions.

If the set hot gas temperature switching value is exceeded, the hot

gas temperature counter increments and the set temperature is

temporarily reduced to the temperature captured by the integral

sensor.

Press the "Menu" button until "h" appears

on the display.

You can change this value using the "Plus"

and "Minus" buttons. Setting range: 100

- 120 °C

INSTALLATION

Appliance shutdown

28 | WWK222-302 H www.stiebel-eltron.com

Example: The set temperature is 65°C. At an actual temperature

of 61°C, for example due to a critical intake temperature, the

appliance detects an unacceptably high hot gas temperature. The

appliance temporarily reduces the set temperature to 61°C. The

appliance shuts down. Once the charge level has been under-

shot (this refers to the currently applicable set value, i.e. 61°C

and not 65°C), and when the hot gas temperature has dropped

again, the compressor restarts and operates with the original set

temperature (65°C). The set temperature is reduced again if the

appliance cannot reach this set temperature because the hot gas

temperature was previously too high.

 Fan lead time

Material losses

Factory default setting: 30s

Only a service technician is permitted to change his pa-

rameter in line with factory instructions.

The set value speciﬁes the number of seconds the fan runs before

the compressor is enabled.

Press the "Menu" button until "u" appears

on the display.

You can change this value using the

"Plus" and "Minus" buttons.

 Replacement sensor

If the integral sensor is faulty, switch this parameter to replace-

ment sensor operation using the "Plus" button.

When replacement sensor operation is active, fault 4 is perma-

nently hidden. The default display shows the cylinder top temper-

ature instead of the mixed water volume.

IE0 Standard mode

IE1 Replacement sensor active

 Set value limit

If set value limiting is active, the lower end of the setting range

for the set value is limited to 61°C. If set value limiting is inactive,

the set value can be adjusted to any value within the applicable

range (see Set value1/Set value2).

Lt 0 Standard mode

Lt1 Set value limiting active

13. Appliance shutdown

Material losses

If you disconnect the appliance from the power supply, it

is no longer protected against frost or corrosion.

f Only disconnect the appliance from the power sup-

ply for longer periods if you are also draining the

DHW cylinder. See chapter "Maintenance/ Draining

the appliance".

The appliance can only be switched off by interrupting the power

supply.

f Disconnect the appliance from the power supply at the fuse

in the distribution board or by unplugging the power plug if

the appliance is connected to a socket.

14. Troubleshooting

WARNING Electrocution

Troubleshooting must only be carried out by a qualiﬁed

contractor. Prior to all work on the appliance, isolate it

from the power supply.

Material losses

If you disconnect the appliance from the power supply, it

is no longer protected against frost or corrosion.

f Only disconnect the appliance from the power sup-

ply for longer periods if you are also draining the

DHW cylinder.

f For work inside the appliance, remove the appliance cover

(see chapter "Cleaning and maintenance/ Removing the ap-

pliance cover").

f If necessary, remove the upper section of the casing jacket

(see chapter "Maintenance and cleaning/ Removing the cas-

ing ring").

Note

Reﬁt the casing ring after completing the work. See chap-

ter "Maintenance and cleaning/ Fitting the casing ring").

Note

Reﬁt the appliance cover after completing your work. See

chapter "Maintenance and cleaning/ Fitting the appliance

cover").

Note

Following an interruption to the power supply, compres-

sor operation remains blocked for at least one minute

while the appliance initialises.

If the compressor subsequently fails to start, it may be

blocked by additional safety devices (motor overload

relay, high pressure switch). This lockout can last be-

tween 1 and 10minutes.

INSTALLATION

Troubleshooting

www.stiebel-eltron.com WWK222-302 H | 29

Fault Cause

f Remedy

No hot water is

available.

The impressed current

anode is faulty.

Replace the impressed current

anode.

The compressor

is switched off

unexpectedly.

The application limits

have been exceeded or

undershot.

No action required.

Excessive pressure in the

refrigerant circuit. The

safety pressure limiter

has responded 5times in

5hours. The compressor

has been switched off.

Eliminate the cause of the

increased pressure in the

refrigerant circuit. Wait ap-

prox.5-15minutes for the appli-

ance to equalise the pressure.

The appliance lockout can only be

cleared using a service program-

ming unit.

The heating

output of the

appliance has

reduced.

An inadequate air flow

across the evaporator is a

possible cause.

Check whether the fan is dirty.

Check whether the evaporator is

dirty. Ensure that the supply and

extract air flow are unimpeded.

14.1 Fault codes

Fault description Remedy

Contin-

uously

The cylinder top sensor is

faulty. The actual tempera-

ture display switches from

the cylinder top sensor to the

integral sensor. The appliance

continues to heat without any

loss of comfort. The mixed

water volume cannot be

calculated and is displayed

as "- -".

Check that the plug is seated

correctly.

Measure the resistance of the

sensor and compare it with the

resistance table.

Install the replacement sensor.

Contin-

uously

The integral sensor is faulty.

In the event of a faulty inte-

gral sensor, the integral sen-

sor is set to the value of the

cylinder top sensor, and the

mixed water volume is calcu-

lated using this value. The ap-

pliance continues to heat with

a reduced start hysteresis.

A mixed water volume is

still calculated, based on the

assumption that the cylinder

top temperature is reached

throughout the DHW cylinder.

Check that the plug is seated

correctly.

Measure the resistance of the

sensor and compare it with the

resistance table.

Install the replacement sensor. In

the service menu, use parameter

"IE" to switch to standby mode.

Flash-

ing

The cylinder top sensor and

the integral sensor are faulty.

The appliance no longer de-

livers heat.

Check that the plug is seated

correctly.

Measure the resistances of the

sensor and compare them with

the resistance table.

Install the replacement sensor. In

the service menu, use parameter

"IE" to switch to standby mode.

Fault description Remedy

Flash-

ing

The appliance has ascertained

that the DHW cylinder has not

been heated within the max-

imum temperature increase

time, despite there being a

demand.

Check if a DHW circulation line

is installed and whether it is in-

sulated. The total output loss is

greater than the heating output of

the appliance.

Check if a DHW circulation pump

is installed and whether it is con-

trolled according to temperature

or time. If necessary, install a

corresponding control unit.

Check the refrigerant circuit for

leaks.

Contin-

uously

A short circuit of the im-

pressed current anode has

occurred or the protective

anode is faulty.

Check the cables and relevant

plug-in connections of the im-

pressed current anode according

to the connection diagram and

replace faulty cables.

Check the impressed current

anode in the heating element/

anode assembly and replace if

necessary.

Flash-

ing

The appliance is not being

operated with a completely

filled DHW cylinder. The ap-

pliance is not heating.

Fill the DHW cylinder of the appli-

ance. The fault code disappears

and the appliance starts.

The anode current is inter-

rupted. The appliance is not

heating.

Check the contacts of the im-

pressed current anode.

Contin-

uously

The defrost temperature has

not yet been reached after the

maximum defrost time has

elapsed. The compressor is

not working.

Check the position of the evapora-

tor sensor in the evaporator.

The temperature of the intake

air is below the lower appli-

cation limit.

Wait for higher ambient tempera-

tures. Ensure that the application

limit is not undershot.

128

Contin-

uously

There is no communication

between the controller and

the programming unit. The

most recently selected set val-

ues are active. The appliance

continues to heat.

Check that the plug is seated cor-

rectly and replace the connecting

cable if necessary.

Replace the programming unit

PCB.

256

Flash-

ing

Manually activated emergen-

cy mode (only electric emer-

gency/booster heater active)

See chapter “Appliance descrip-

tion/ Emergency mode”.

E 1 Flash-

ing

The temperature sensor on

the air inlet is faulty.

Check that the plug is seated

correctly.

Measure the resistance of the

sensor and compare it with the

resistance table.

Replace the sensor.

E 2 Flash-

ing

The temperature sensor on

the evaporator is faulty.

Check that the plug is seated

correctly.

Measure the resistance of the

sensor and compare it with the

resistance table.

Replace the sensor.

E 4

Contin-

uously

The hot gas temperature

sensor is faulty. The appliance

continues to heat. To protect

the appliance, the (possibly

higher) set temperature is

reduced to the set value for

setback.

Check that the plug is seated

correctly.

Measure the resistance of the

sensor and compare it with the

resistance table.

Replace the sensor.

INSTALLATION

Maintenance

30 | WWK222-302 H www.stiebel-eltron.com

Fault description Remedy

E 16

Contin-

uously

The high pressure switch

has responded. Compressor

heating mode is temporarily

blocked. Compressor heating

mode will continue as soon as

the pressure has normalised.

No action required.

After consultation with the cus-

tomer, reduce the set temperature

if required. Increase the charge

level with the programming unit.

Check the offset of the integral

sensor to the cylinder top sensor

and adjust if necessary.

Check the high pressure switching

point and replace the high pres-

sure switch if necessary.

E 32

Contin-

uously

An electrical fault has oc-

curred.

A1/X2 : Check whether the power

supply has been interrupted. Then

reset the fault with the corre-

sponding menu option.

E 64

Flash-

ing

Evaporator temperature <

Minimum evaporator tem-

perature

Check whether the evaporator is

clogged with deposits. If required,

clean the evaporator with clear

water without cleaning agents or

other additives.

Check whether air can flow freely

through the appliance.

Check whether the fan is blocked

or faulty. Replace the fan if nec-

essary.

Check the function and setting of

the expansion valve.

Check whether the appliance has

defrosted.

128

Flash-

ing

A permanent pressure switch

fault has occurred. A pressure

fault occurred multiple times

within a defined pressure

fault evaluation time.

Check the relevant fault counter

and look up the corresponding

fault code remedy: E16 (high

pressure), E32 (electrical wiring

fault). Once the cause of the fault

has been eliminated, clear the

fault code in menu item "Hd 1"

by pressing the "Rapid heat-up"

button.

14.2 Resetting the safety pressure limiter

The safety pressure limiter responds in the event of unacceptably

high pressure in the refrigerant circuit. If the safety pressure lim-

iter responds 5 times in 5 hours, compressor operation is blocked.

f Eliminate the cause of the increased pressure in the refriger-

ant circuit.

f Wait approx.5-15minutes for the appliance to equalise the

pressure.

The appliance lockout can only be cleared using a service pro-

gramming unit.

14.3 WWK222H/ WWK 302H : Resetting the high

limit safety cut-out

If the DHW cylinder is overheated, the high limit safety cut-out

switches off the electric emergency/booster heater to protect the

appliance.

D0000039352

1 Reset button for high limit safety cut-out

f Once the cause of the fault has been removed, press the reset

button of the high limit safety cut-out on the rod thermostat.

To do so, remove the appliance cover.

14.4 Motor overload relay

The motor overload relay will shut down the compressor if it is

overloaded because of excessive thermal load.

f Remove the cause.

After a short cooling period, the motor overload relay will restart

the compressor automatically.

15. Maintenance

WARNING Electrocution

Prior to all work on the appliance, isolate it from the

power supply.

15.1 Removing the appliance cover

D0000040621

f Undo the screw (Torx) that secures the programming/control

cover to the appliance.

f Push the programming/control cover upwards.

INSTALLATION

Maintenance

www.stiebel-eltron.com WWK222-302 H | 31

D0000040622

f Carefully remove the cover.

f A cable connects the operating controls to the appliance PCB.

If necessary, disconnect the plug at the back of the program-

ming/control cover to fully remove it.

f Undo the plug-in connection in the cable that runs to the

battery pack at the back of the cover.

f Carefully lift away the appliance cover and release the earth

cable that runs from the appliance control panel to the cover.

Note

Reﬁt the appliance cover after completing your work. See

chapter "Maintenance and cleaning/ Fitting the appliance

cover").

15.2 Removing the casing ring

Note

If you require more space to work inside the appliance,

you can remove the casing ring on the upper section of

the appliance.

D0000034803

1 Fixing screws on casing ring

The casing ring is fastened with screws.

f Undo the ﬁxing screws on the casing ring.

f Remove the condensate drain bend and pipe collar of the

drain. Turn anti-clockwise to release.

Material losses

Inside the appliance, an earth cable is connected to the

casing ring. Release the earth cable in order to be able

to remove the casing ring.

D0000034814

The casing ring overlaps along the joint. A tab on one end clips

into the recess at the other end of the casing ring.

f Ease the casing ring apart, until it can be removed or slid

downwards.

Note

Reﬁt the casing ring after completing the work. See chap-

ter "Maintenance and cleaning/ Fitting the casing ring").

15.3 Cleaning the evaporator

WARNING Injury

The evaporator consists of numerous sharp-edged ﬁns.

f Be careful when cleaning the evaporator and wear

protective clothing, especially safety gloves.

To keep the appliance performance levels as high as possible,

check and clean the appliance evaporator as often as necessary.

f Undo the screw that fastens the appliance cover to the top of

the programming/control cover.

f Remove the programming/control cover and the appliance

cover.

f Carefully clean the evaporator ﬁns. Only use water and a soft

brush for this. Never use acidic or alkaline cleaning agents.

15.4 Draining the cylinder

WARNING Burns

Hot water may escape when draining the DHW cylinder.

To drain the DHW cylinder, e.g. when shutting the appliance down,

proceed as follows.

f Isolate the appliance from the power supply.

f Close the shut-off valve in the cold water supply line.

The DHW cylinder is drained via the cold water supply line.

f Open the drain valve installed in the cold water supply line

(see chapter "Water connection"). If no drain valve has been

installed, undo the cold water supply line at the "Cold water

inlet" connection.

f To vent the system, undo the DHW line connected to the

"DHW outlet" connection.

Some residual water will remain in the bottom of the DHW cyl-

inder.

INSTALLATION

Maintenance

32 | WWK222-302 H www.stiebel-eltron.com

15.5 Descaling the electric emergency/booster

heater

Only descale the ﬂange of the emergency/booster heater after

disassembly. Never treat the inside of the DHW cylinder or the

impressed current anode with descaling agents. The electric

emergency/booster heater is screwed into the DHW cylinder of

the appliance at a central point at the top.

D0000039351

1 Electric emergency/booster heater with protective anode

15.6 Valves

Regularly check the valves in the system (safety valve, pressure

reducing valve, drain valve) to ensure the operational reliability

of the appliance. The amount of limescale deposits depends on

the local water quality.

f Check all valves in the system and remove limescale deposits.

f Replace the valves if necessary.

f Check the function of the valves.

15.7 Condensate drain

f Check whether the condensate drain is clear of obstructions.

Remove any dirt.

15.8 Replacing the power cable

WARNING Electrocution

The power cable must only be replaced (for example if

damaged) by a qualiﬁed contractor.

15.9 Fitting the casing ring

WARNING Electrocution

f Reconnect the earth cable to the casing ring.

D0000034814

f Fit the upper casing ring. The casing ring overlaps along the

joint. A tab on one end clips into the recess at the other end

of the casing ring.

f Secure the casing ring with screws.

f Fit the pipe collar of the condensate drain and the conden-

sate drain bend.

15.10 Protective anode and battery change

The appliance is equipped with a maintenance-free impressed

current anode that protects the cylinder from corrosion when it

is connected to the power supply. At the factory, the appliance is

ﬁtted with rechargeable batteries that ensure the power supply

to the impressed current anode in the case of a power failure.

The appliance power supply must not be interrupted for more

than 16hours.

If the power supply is regularly interrupted by a switching con-

tact or the security of supply is inadequate, the batteries of the

impressed current anode must be replaced every three years.

Failure to comply may result in damage to the appliance. If regular

interruptions to the power supply are not anticipated and there

is security of supply, no maintenance of the batteries is required

and the appliance is maintenance-free in this regard.

Material losses

Never use batteries that cannot be charged. Only re-

chargeable NiMH batteries are permissible.

Batteries may be damaged in the appliance. Without a

power supply, the impressed current anode and the cyl-

inder would not be protected against corrosion.

The batteries are secured at the back of the programming/control

cover.

INSTALLATION

Maintenance

www.stiebel-eltron.com WWK222-302 H | 33

D0000040621

f Undo the screw securing the cover.

f Carefully remove the cover so that the cables running from

the batteries to the impressed current anode in the appliance

are not pulled out.

D0000051618

1 Plug-in connection

f Undo the plug-in connection by pressing the catches on both

sides.

D0000075888

1 Battery compartment

f Carefully pull the battery compartment on the right-hand

side forward.

f Remove the battery compartment from the retainer.

f Open the battery compartment using a screwdriver.

f Replace the batteries (NiMH, type AAA ≥800mAh).

Material losses

Make sure that the batteries are inserted properly and

the right way round, because otherwise there will be no

corrosion protection in the event of interruptions to the

power supply.

f Close the battery compartment using a screwdriver.

f Push the battery compartment into the retainer.

f Reconnect it to the appliance with the plug-in connection.

15.11 Fitting the appliance cover

WARNING Electrocution

f Reconnect the earth cable to the appliance cover.

f Place the cover back on the appliance.

f Press the cover into the bead around the casing ring.

f Connect the cable linking the batteries with the internal con-

trol unit at the back of the programming/control cover.

f Connect the cable linking the programming unit to the PCB

inside the appliance at the back of the programming/control

cover.

f Insert the programming/control cover.

f Use the screw to secure the programming/control cover at

the top of the appliance.

INSTALLATION

Specication

34 | WWK222-302 H www.stiebel-eltron.com

16. Speciﬁcation

16.1 Dimensions and connections

16.1.1 WWK222 / WWK222H

1501

690

b01

1116

d45

g01g02

i43

30°

8-24

215

935

c01

c06 c13

D0000074176

WWK 222 WWK 222 H

b01 Entry electrical cables

c01 Cold water inlet Male thread G 1 G 1

c06 DHW outlet Male thread G 1 G 1

c13 T&P valve Female thread Rp 3/4 Rp 3/4

d45 Condensate drain Male thread G 3/4 G 3/4

g01 Air intake

g02 Air discharge

i43 Cover for manufacturing aperture

INSTALLATION

Specication

www.stiebel-eltron.com WWK222-302 H | 35

16.1.2 WWK302 / WWK302H

1502

1905

690

b01

d45

AAA A AA

30°

8-24

g01g02

i43

215

1290

c01

c06 c13

D0000074178

WWK 302 WWK 302 H

b01 Entry electrical cables

c01 Cold water inlet Male thread G 1 G 1

c06 DHW outlet Male thread G 1 G 1

c13 T&P valve Female thread Rp 3/4 Rp 3/4

d45 Condensate drain Male thread G 3/4 G 3/4

g01 Air intake

g02 Air discharge

i43 Cover for manufacturing aperture

INSTALLATION

Specication

36 | WWK222-302 H www.stiebel-eltron.com

16.2 Wiring diagram

WWK 222/302 (H)

aktive Abtauung / aktive Anode

active defrost / active anode

dégivrage active / anode active

X13

BNBK BU

BNBU

GNYE

X14

LL1

X19

X15

X18

L´

N´

X4 X11 X12 X10

X16

X23

X20

X22

X21X17

coat

cap

storage tank

BN BU

1 2

A B

storage tank

4,8 V

nur/only/seulement:

WWK 222/302 H

F 100 mA / 250 V

housing A3

D0000040539

INSTALLATION

Specication

www.stiebel-eltron.com WWK222-302 H | 37

A1 Electronic assembly (control unit)

A2 Electronic assembly (programming unit)

A3 Electronic assembly (electrical corrosion protection)

C1 Capacitor

C2 Battery pack

E1 Heating element

F1 High limit safety cut-out TSR

F2 Motor overload relay M1

F3 High pressure switch

F4 Fuse

F5 Fuse

G1 Impressed current anode

M1 Compressor

M2 Fan

N1 Thermostat TSR

R1 Resistor

S1 DIP switch (operating mode)

S2 DIP switch

T1 Temperature sensor cylinder top/int.

T2 Temperature sensor, hot gas

T3 Temperature sensor, air intake

T4 Temperature sensor, evaporator

V1 Solenoid valve (live in heating mode)

V2 Solenoid valve (live in defrost mode)

X0 Mains terminal

X1 Terminal

X3 Terminal

X4 Terminal, battery pack

16.3 Fault conditions

WARNING Burns

In the case of a fault, temperatures up to the high limit

safety cut-out limit can occur (see chapter "Speciﬁca-

tion/ Data table").

INSTALLATION

Specication

38 | WWK222-302 H www.stiebel-eltron.com

16.4 Data table

WWK 222 WWK 222 H WWK 302 WWK 302 H

231209 233209 231211 232905

Hydraulic data

Nominal capacity l 220 220 302 302

Application limits

DHW temperature with heat pump °C 61 61 61 61

Max. DHW temperature with heat pump °C 65 65 65 65

Max. DHW temperature with emergency/booster heater °C 65 65 65 65

High limit safety cut-out °C 92 92 92 92

Min./max. application limits of heat source for heat pump operation °C -5/+42 -5/+42 -5/+42 -5/+42

Min./max. application limits for cylinder ambient temperature °C -5/+55 -5/+55 -5/+55 -5/+55

Min. installation room volume (recirculation air mode, general domestic

use)

m³ 13 13 13 13

Max. permissible operating pressure, cold water/DHW MPa 0.85 0.85 0.85 0.85

Min./max. conductivity, potable water μS/cm 100-1500 100-1500 100-1500 100-1500

Annual Average Coefficient of Performance (Australia)

ACOP (AS/NZS 4234 | climate zone 2 | medium load) 3.94 3.94 3.58 3.58

Values

Temperature setting range, DHW °C 61-65 61-65 61-65 61-65

Type of anode

Maintenance-free

impressed current

anode

Maintenance-free

impressed current

anode

Maintenance-free

impressed current

anode

Maintenance-free

impressed current

anode

Air flow rate m³/h 550 550 550 550

Recommended number of users ≤ 4 ≤ 4 ≤ 6 ≤ 6

Energy data

DHW heating energy efficiency class (load profile), indoor air A+ (L) A+ (L) A (XL) A (XL)

Output data to EN 16147

Nominal DHW temperature (EN 16147) °C 61 61 61 61

Nominal load profile (EN 16147) L L XL XL

Heating output

Average heating output (A15 / W10-55) kW 1.6 1.6 1.6 1.6

Power consumption

Average power consumption of heat pump (A15 / W10-55) kW 0.5 0.5 0.5 0.5

Max. heat pump power consumption (excl. start-up) kW 0.65 0.65 0.65 0.65

Power consumption, emergency/booster heater kW 1.5 1.5

Max. power consumption, heat pump + emergency/booster heater kW 2.2 2.2

Electrical data

Rated voltage V 230 230 230 230

Power supply 1/N/PE 220-240 V

50/60 Hz

1/N/PE 220-240 V

50/60 Hz

1/N/PE 220-240 V

50/60 Hz

1/N/PE 220-240 V

50/60 Hz

Permissible voltage range, external signal transmitter ~ 220-240 V 50/60

~ 220-240 V 50/60

Max. operating current A 3.18 9.7 3.18 9.7

Max. starting current A 15.4 23.44 15.4 23.44

Fuse protection A C10 C16 C10 C16

Sound emissions

Sound power level (EN 12102) dB(A) 60 60 60 60

Average sound pressure level at 1m distance, free field dB(A) 45 45 45 45

Versions

IP rating IP24 IP24 IP24 IP24

Refrigerant R134a R134a R134a R134a

Refrigerant charge kg 0.85 0.85 0.85 0.85

Global warming potential of the refrigerant (GWP100) 1430 1430 1430 1430

equivalent (CO

e) t 1.216 1.216 1.216 1.216

Power cable length approx. mm 2000 2000 2000 2000

Dimensions

Height mm 1501 1501 1905 1905

Diameter mm 690 690 690 690

Height when tilted mm 1652 1652 2026 2026

Height when tilted incl. packaging mm 1895 1895 2230 2230

Packing unit dimensions height/width/depth mm 1740/740/740 1740/740/740 2100/740/740 2100/740/740

Weights

Weight, empty kg 120 120 135 135

INSTALLATION

Specication

www.stiebel-eltron.com WWK222-302 H | 39

WWK 222 WWK 222 H WWK 302 WWK 302 H

Connections

Condensate connection G 3/4 G 3/4 G 3/4 G 3/4

Safety valve connection Rp 3/4 Rp 3/4 Rp 3/4 Rp 3/4

Water connection G 1 (with adaptor

Rp 3/4 fem.)

G 1 (with adaptor

Rp 3/4 fem.)

G 1 (with adaptor

Rp 3/4 fem.)

G 1 (with adaptor

Rp 3/4 fem.)

The output data refers to new appliances with clean heat ex-

changers.

Nominal data to EN16147 – heat pump for recirculation air

16.5 Standardised output data

Information on determining and interpreting the speciﬁed stand-

ardised output data

Standard: EN 16147

The output data speciﬁcally mentioned in text, diagrams and

technical datasheets has been determined in line with the test

conditions described in the standard shown in the heading of

this chapter.

Generally, these standardised test conditions will not fully meet

the conditions found at the installation site of the system user.

Depending on the chosen test method and the extent to which

the selected method deviates from the conditions described in

the standard shown in the heading of this chapter, any deviations

can have a considerable impact. Additional factors that have an

inﬂuence on the test values are the measuring equipment, the

system conﬁguration, the age of the system and the ﬂow rates.

A conﬁrmation of the speciﬁed output data can only be obtained

if the conditions applicable to the relevant test match those of the

standard shown in the heading of this chapter.

40 | WWK222-302 H www.stiebel-eltron.com

GUARANTEE | ENVIRONMENT AND RECYCLING

GUARANTEEGUARANTEE

ENVIRONMENT AND RECYCLINGENVIRONMENT AND RECYCLING

GUARANTEEGUARANTEE

ENVIRONmENT AND RECYCLINGENVIRONmENT 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.

www.stiebel-eltron.com WWK222-302 H | 41

WARRANTY

Warranty Stiebel Eltron Australia Only - According to national

regulations in Australia

Warranty for Heat Pumps – Models WWK 222, WWK 222 H,

WWK302 and WWK302H

Who gives the warranty

1. The warranty is given by Stiebel Eltron (Aust) Pty Ltd

(A.B.N.82066271083) of 294 Salmon Street, Port Mel-

bourne, Victoria, 3207 (“we”, “us” or “our”).

The warranty

2. This warranty applies to Stiebel Eltron Heat Pumps – Mod-

els WWK222, WWK222H, WWK302 and WWK302H (the

“unit”) manufactured after 1 July 2015.

3. Subject to the warranty exclusions we will repair or re-

place, at our absolute discretion, a faulty component in

your unit free of charge if it fails to operate in accordance

with its speciﬁcations during the warranty period.

4. If we repair or replace a faulty component to your unit

under this warranty, the warranty period is not extended

from the time of the repair or replacement.

5. The warranty period commences on the date of completion

of the installation of the unit. Where the date of completion

of installation is not known, then the warranty period will

commence 2 months after the date of manufacture.

6. The warranty period for a unit used for domestic purposes

is shown in the table below. Domestic purposes means

that the unit is used in a domestic dwelling.

Component Warranty period

Cylinder and condenser 5 years

Sealed refrigeration sys-

tem, including compres-

sor, evaporator, valves and

associated pipe work. All

other electrical componen-

try.

2 years

T&P relief valve 1 year

7. The warranty period for a unit used for commercial pur-

poses is shown in the table below. Commercial purposes

means that the unit is used for a non-domestic purpose

and includes but not limited to being used in a motel,

hotel, mining camp or nursing home.

Component Warranty period

Cylinder and condenser 2 years

Sealed refrigeration sys-

tem, including compres-

sor, evaporator, valves and

associated pipe work. All

other electrical componen-

try.

2 years

T&P relief valve 1 year

Your entitlement to make a warranty claim

8. You are entitled to make a warranty claim if:

8.1. you own the unit or if you have the owner’s consent to rep-

resent the owner of the unit;

8.2. you contact us within a reasonable time of discovering the

problem with the unit;

How you make a warranty claim

9. To make a warranty claim you must provide us with the

following information:

9.1. The model number of the unit;

9.2. A description of the problem with the unit;

9.3. The name, address and contact details (such as phone

number and e-mail address) of the owner;

9.4. The address where the unit is installed and the location

(e.g. at side of house);

9.5. The serial number of the unit;

9.6. The date of purchase of the unit and the name of the seller

of the unit;

9.7. The date of installation of the unit;

9.8. A copy of the certiﬁcate of compliance when the unit was

installed.

10. The contact details for you to make your warranty claim

are:

Name: Stiebel Eltron (Aust) Pty Ltd

Address: 294 Salmon Street, Port Melbourne,

Victoria, 3207

Telephone: 1800 153 351 (8.00am to 5.00pm AEST

Monday to Friday)

Contact person: Customer Service Representative

E-mail: service@stiebel.com.au

11. We will arrange a suitable time with you to inspect and

test the unit.

42 | WWK222-302 H www.stiebel-eltron.com

WARRANTY

Warranty exclusions

12. We may reject your warranty claim if:

12.1. The unit was not installed by a registered and qualiﬁed

plumber.

12.2. The unit was not installed and commissioned:

a) in Australia;

b) in accordance with the Operating and Installation

Guide; and

c) in accordance with the relevant statutory and local

requirements of the State or Territory in which the unit

is installed.

12.3. The unit has not been operated or maintained in accord-

ance with the Operating and Installation Guide.

12.4. The unit does not bear its original Serial Number or Rating

Label.

12.5. The unit was damaged by any or any combination of the

following:

a) normal fair wear and tear;

b) connection to an incorrect water supply, for example,

(but not limited to) connection to water from a bore,

dam or swimming pool;

c) connection to an incorrect power supply;

d) connection to faulty equipment, such as damaged

valves;

e) insufﬁcient air ﬂow;

f) foreign matter in the water supply, such as sludge or

sediment;

g) corrosive or acidic elements in the water supply,

where the Langelier Saturation Index (LSI) is outside

the range -1.0 < LSI < 0.8;

h) inappropriate current impressed anode;

i) inappropriate current impressed anode battery

maintenance;

j) accidental damage;

k) uncontrollable natural phenomena, including damage

by ﬂood, storm, ﬁre, lightning strike and the like;

l) excessive water pressure, negative water pressure

(partial vacuum) or water pressure pulsation;

m) ingress of vermin.

12.6. The unit was damaged before it was installed e.g. it was

damaged in transit.

12.7. An unauthorised person has modiﬁed, serviced, repaired

or attempted to repair the unit without our consent.

12.8. Non genuine parts other than those manufactured or ap-

proved by us have been used on the unit.

13. We may charge you:

13.1. for any additional transport costs if the unit is installed

more than 30kilometres from our closest authorised ser-

vice technician.

13.2. for the extra time it takes our authorised service technician

to access the unit for inspection and testing if it is not sited

in accordance with the Operating and Installation Guide

and not readily accessible for inspection.

13.3. for any extra costs of our authorised service technician to

make the unit safe for inspection.

www.stiebel-eltron.com WWK222-302 H | 43

NOTES

Deutschland

STIEBEL ELTRON GmbH & Co. KG

Dr.-Stiebel-Straße 33 | 37603 Holzminden

Tel. 05531 702-0 | Fax 05531 702-480

info@stiebel-eltron.de

www.stiebel-eltron.de

Verkauf Tel. 05531 702-110 | Fax 05531 702-95108 | info-center@stiebel-eltron.de

Kundendienst Tel. 05531 702-111 | Fax 05531 702-95890 | kundendienst@stiebel-eltron.de

Ersatzteilverkauf www.stiebel-eltron.de/ersatzteile | ersatzteile@stiebel-eltron.de

Irrtum und technische Änderungen vorbehalten! | Subject to errors and technical changes! | Sous réserve

d‘erreurs et de modifications techniques! | Onder voorbehoud van vergissingen en technische wijzigingen!|

Salvo error o modificación técnica! | Excepto erro ou alteração técnica | Zastrzeżone zmiany techniczne i

ewentualne błędy | Omyly a technické změny jsou vyhrazeny! | A muszaki változtatások és tévedések jogát

fenntartjuk! | Отсутствие ошибок не гарантируется. Возможны технические изменения. | Chyby a

technické zmeny sú vyhradené! Stand 9734

Australia

STIEBEL ELTRON Australia Pty. Ltd.

294 Salmon Street | Port Melbourne VIC 3207

Tel. 03 9645-1833 | Fax 03 9644-5091

info@stiebel-eltron.com.au

www.stiebel-eltron.com.au

Austria

STIEBEL ELTRON Ges.m.b.H.

Gewerbegebiet Neubau-Nord

Margaritenstraße 4 A | 4063 Hörsching

Tel. 07221 74600-0 | Fax 07221 74600-42

info@stiebel-eltron.at

www.stiebel-eltron.at

Belgium

STIEBEL ELTRON bvba/sprl

't Hofveld 6 - D1 | 1702 Groot-Bijgaarden

Tel. 02 42322-22 | Fax 02 42322-12

info@stiebel-eltron.be

www.stiebel-eltron.be

China

STIEBEL ELTRON (Tianjin) Electric Appliance

Co., Ltd.

Plant C3, XEDA International Industry City

Xiqing Economic Development Area

300385 Tianjin

Tel. 022 8396 2077 | Fax 022 8396 2075

info@stiebeleltron.cn

www.stiebeleltron.cn

Czech Republic

STIEBEL ELTRON spol. s r.o.

Dopraváků 749/3 | 184 00 Praha 8

Tel. 251116-111 | Fax 235512-122

info@stiebel-eltron.cz

www.stiebel-eltron.cz

Finland

STIEBEL ELTRON OY

Kapinakuja 1 | 04600 Mäntsälä

Tel. 020 720-9988

info@stiebel-eltron.fi

www.stiebel-eltron.fi

France

STIEBEL ELTRON SAS

7-9, rue des Selliers

B.P 85107 | 57073 Metz-Cédex 3

Tel. 0387 7438-88 | Fax 0387 7468-26

info@stiebel-eltron.fr

www.stiebel-eltron.fr

Hungary

STIEBEL ELTRON Kft.

Gyár u. 2 | 2040 Budaörs

Tel. 01 250-6055 | Fax 01 368-8097

info@stiebel-eltron.hu

www.stiebel-eltron.hu

Japan

NIHON STIEBEL Co. Ltd.

Kowa Kawasaki Nishiguchi Building 8F

66-2 Horikawa-Cho

Saiwai-Ku | 212-0013 Kawasaki

Tel. 044 540-3200 | Fax 044 540-3210

info@nihonstiebel.co.jp

www.nihonstiebel.co.jp

Netherlands

STIEBEL ELTRON Nederland B.V.

Daviottenweg 36 | 5222 BH 's-Hertogenbosch

Tel. 073 623-0000 | Fax 073 623-1141

info@stiebel-eltron.nl

www.stiebel-eltron.nl

New Zealand

Stiebel Eltron NZ Limited

61 Barrys Point Road | Auckland 0622

Tel. +64 9486 2221

info@stiebel-eltron.co.nz

www.stiebel-eltron.co.nz

Poland

STIEBEL ELTRON Polska Sp. z O.O.

ul. Działkowa 2 | 02-234 Warszawa

Tel. 022 60920-30 | Fax 022 60920-29

biuro@stiebel-eltron.pl

www.stiebel-eltron.pl

Russia

STIEBEL ELTRON LLC RUSSIA

Urzhumskaya street 4,

building 2 | 129343 Moscow

Tel. +7 495 125 0 125

info@stiebel-eltron.ru

www.stiebel-eltron.ru

Slovakia

STIEBEL ELTRON Slovakia, s.r.o.

Hlavná 1 | 058 01 Poprad

Tel. 052 7127-125 | Fax 052 7127-148

info@stiebel-eltron.sk

www.stiebel-eltron.sk

South Africa

STIEBEL ELTRON Southern Africa (PTY) Ltd

30 Archimedes Road

Wendywood

Johannesburg, 2090

Tel. +27 10 001 85 47

info@stiebel-eltron.co.za

www.stiebel-eltron.co.za

Switzerland

STIEBEL ELTRON AG

Industrie West

Gass 8 | 5242 Lupfig

Tel. 056 4640-500 | Fax 056 4640-501

info@stiebel-eltron.ch

www.stiebel-eltron.ch

Thailand

STIEBEL ELTRON Asia Ltd.

469 Moo 2 Tambol Klong-Jik

Amphur Bangpa-In | 13160 Ayutthaya

Tel. 035 220088 | Fax 035 221188

info@stiebeleltronasia.com

www.stiebeleltronasia.com

United Kingdom and Ireland

STIEBEL ELTRON UK Ltd.

Unit 12 Stadium Court

Stadium Road | CH62 3RP Bromborough

Tel. 0151 346-2300 | Fax 0151 334-2913

info@stiebel-eltron.co.uk

www.stiebel-eltron.co.uk

United States of America

STIEBEL ELTRON, Inc.

17 West Street | 01088 West Hatfield MA

Tel. 0413 247-3380 | Fax 0413 247-3369

info@stiebel-eltron-usa.com

www.stiebel-eltron-usa.com

A 313804-45063-9775

B 303643-45063-9775

4<AMHCMO=bdiaee>

Stiebel Eltron WWK222H 220L Heat Pump Hot Water System

Product's Documents

STIEBEL ELTRON New Zealand Operation and Installation

Specifications

Stiebel Eltron WWK222H Questions and Answers