STIEBEL ELTRON WPL 09 ICS classic, WPL 09 IKCS classic, WPL 17 ICS classic, WPL 17 IKCS classic Operation And Installation

OPERATION AND INSTALLATION

Air | water heat pump

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CONTENTS

SPECIAL INFORMATION

OPERATION

1. General information �����������������������������������������3

1.1 Relevant documents_____________________________________________ 3

1.2 Safety instructions _______________________________________________ 3

1.3 Other symbols in this documentation _______________________ 4

1.4 Units of measurement __________________________________________ 4

1.5 Standardised output data ______________________________________ 4

2. Safety ���������������������������������������������������������� 4

2.1 Intended use ______________________________________________________ 4

2.2 Safety instructions _______________________________________________ 4

2.3 Test symbols ______________________________________________________ 4

3. Appliance description ���������������������������������������5

3.1 Function ___________________________________________________________ 5

4. Settings �������������������������������������������������������5

5. Maintenance and care ���������������������������������������5

6. Troubleshooting ����������������������������������������������6

INSTALLATION

7. Safety ���������������������������������������������������������� 7

7.1 General safety instructions ____________________________________ 7

7.2 Instructions, standards and regulations ____________________ 7

7.3 Operation of the appliance in buildings with
combustion equipment _________________________________________ 7

8. Appliance description ���������������������������������������7

8.1 Standard delivery ________________________________________________ 7

8.2 Required accessories ___________________________________________ 7

8.3 Additional accessories __________________________________________ 7

9. Preparation ���������������������������������������������������7

9.1 Sound emissions _________________________________________________ 7

9.2 Minimum clearances ____________________________________________ 8

9.3 Preparing the installation location ___________________________ 9

9.4 Wall outlet _________________________________________________________ 9

9.5 Preparing the electrical installation ________________________ 11

9.6 Buffer cylinder __________________________________________________ 12

10. Installation �������������������������������������������������� 12

10.1 Transport _________________________________________________________ 12

10.2 Siting ______________________________________________________________ 13

10.3 Flow and return connection __________________________________ 13

10.4 Fitting the push-fit connectors _______________________________ 13

10.5 Heating water connection _____________________________________ 14

10.6 Oxygen diffusion ________________________________________________ 14

10.7 Second heat generator ________________________________________ 14

10.8 Condensate drain and overpressure valve _________________ 15

10.9 Checking the condensate drain ______________________________ 15

10.10 Temperature controller for underfloor heating systems 15

10.11 Filling the heating system ____________________________________ 15

10.12 Venting the heating system ___________________________________ 16

10.13 Minimum flow rate _____________________________________________ 16

10.14 Flow rate on the heating side ________________________________ 16

11. Electrical connection ��������������������������������������� 17

11.1 Terminal area ____________________________________________________ 17

12. Fitting the appliance casing ������������������������������� 19

12.1 Fitting the cover panels _______________________________________ 19

12.2 Fitting the side panels _________________________________________ 20

12.3 Fitting the front panel _________________________________________20

13. Routing the air hoses �������������������������������������� 21

13.1 Connection with air routing accessory
LSWP315AWGSet _____________________________________________ 21

13.2 Connection with quick-fit adaptor ZSA315 ________________22

14. Commissioning ��������������������������������������������� 22

14.1 Checks to be carried out before commissioning the
heat pump manager ___________________________________________ 22

14.2 Commissioning the heat pump manager __________________ 22

14.3 Initial start-up ___________________________________________________ 22

15. Appliance shutdown ��������������������������������������� 23

15.1 Standby mode ___________________________________________________ 23

15.2 Power interruption _____________________________________________ 23

16. Appliance handover ���������������������������������������� 23

17. Troubleshooting �������������������������������������������� 23

17.1 Control elements on the IWS _________________________________ 24

17.2 Resetting the temperature controller _______________________ 25

17.3 Fan noise _________________________________________________________ 25

18. Maintenance ������������������������������������������������ 25

18.1 Cleaning the evaporator fins _________________________________ 25

18.2 Cleaning the condensate drain _______________________________ 26

19. Specification ������������������������������������������������ 28

19.1 Dimensions and connections _________________________________ 28

19.2 Wiring diagram _________________________________________________ 30

19.3 Output diagrams ________________________________________________ 33

19.4 Data table ________________________________________________________ 39

GUARANTEE

ENVIRONMENT AND RECYCLING

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SPECIAL INFORMATION | OPERATION

General information

SPECIAL INFORMATION

- The appliance may be used by children aged8
and older and persons with reduced physical,
sensory or mental capabilities or a lack of ex­perience and know-how, provided that they are
supervised or they have been instructed on how
to use the appliance safely and have understood
the potential risks. Children must never play with
the appliance. Children must never clean the ap­pliance or perform user maintenance unless they
are supervised.

- The connection to the power supply must be in
the form of a permanent connection. Ensure the
appliance can be separated from the power sup­ply by an isolator that disconnects all poles with
at least 3mm contact separation.

- Maintain the minimum clearances to ensure trou­ble-free operation of the appliance and facilitate
maintenance work.

- Maintenance work, such as checking the electri­cal safety, must only be carried out by a qualified
contractor.

- We recommend regular inspection (to establish
the current condition of the system), and main­tenance by a qualified contractor if required (to
return the system to its original condition).

- Following disconnection from the power supply,
parts of the appliance may remain energised
for 2 minutes until the inverter capacitors have
discharged.

- Never interrupt the heat pump power supply,
even outside of the heating season. Otherwise,
system frost protection is not guaranteed.

- The heat pump manager automatically switches
the heat pump to summer or winter mode.

- If the heat pump is completely switched off and
there is a risk of frost, drain the system on the
water side.

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 appli­ance and retain them for future reference.
Pass on the instructions to a new user if required.

1.1 Relevant documents

 Operating instructions for the WPM heat pump manager
 Commissioning instructions for the WPM heat pump

manager

 Operating and installation instructions for system

components

1.2 Safety instructions

1.2.1 Structure of safety instructions

!

KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.

 Steps to prevent the risk are listed.

1.2.2 Symbols, type of risk

Symbol Type of risk

Injury

Electrocution

1.2.3 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.

!

OPERATION

Safety

4 |WPL ICS classic | WPL IKCS classic www.stiebel-eltron.com

1.3 Other symbols in this documentation

Note

General information is identified by the adjacent symbol.

 Read these texts carefully.

Symbol Meaning

Material losses
(appliance damage, consequential losses and environmen­tal pollution)

Appliance disposal

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

tion you need to take is described step by step.

1.4 Units of measurement

Note

All measurements are given in mm unless stated oth­erwise.

1.5 Standardised output data

Information on determining and interpreting the specified stand­ardised output data.

1.5.1 EN 14511

The output data specifically mentioned in texts, diagrams and
technical datasheets has been calculated according to the test
conditions of the standard shown in the heading of this section.
However, there is a deviation from this norm in the output data for
air/water inverter heat pumps at source temperatures of > -7°C,
as this concerns partial load values. The associated percentage
weighting in the partial load range can be found in EN14825 and
EHPA quality label regulations.

Generally, the test conditions stated above will not fully match the
conditions found at the installation site of the system user.

Depending on the chosen test method and the extent to which
this method differs from the test conditions defined in the first
paragraph of this section, any deviations can be considerable.

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.

Confirmation of the specified output data can only be obtained if
the test conducted for this purpose is also performed in accord­ance with the test conditions defined in the first paragraph of this
section.

2. Safety

2.1 Intended use

The appliance is designed for central heating and cooling within
the application limits provided in the specification.

The appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in non-do­mestic environments, e.g. in small businesses, as long as it is
used in the same way.

Any other use beyond that described shall be deemed inappro­priate. Observation of these instructions and of the instructions
for any accessories used is also part of the correct use of this
appliance.

2.2 Safety instructions

Observe the following safety instructions and regulations.

- Only qualified contractors are permitted to carry out electri­cal work and the installation of the heating circuit.

- The qualified contractor is responsible for adherence
to all applicable regulations during installation and
commissioning.

- The appliance should only be operated once it is fully in­stalled and all safety equipment has been fitted.

- Protect the appliance from dust and dirt during building
work.

!

WARNING Injury
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 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. Children must never clean the ap­pliance or perform user maintenance unless they are
supervised.

!

WARNING Injury

 For safety reasons, only operate the appliance with

the casing closed.

2.3 Test symbols

See type plate on the appliance.

!

OPERATION

Appliance description

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3. Appliance description

The appliance is an air | water heat pump that oper­ates as a heating heat pump. The appliance extracts heat
from the outdoor air at a low temperature level and trans­fers it to the heating water at a higher temperature level.
The heating water can be heated up to a flow temperature of 60 °C.

The appliance is equipped with an electric emergency/booster
heater (DHC). To safeguard heating operation and the provision
of high DHW temperatures, the electric emergency/booster heat­er is activated as an emergency heater if the dual mode point
is undershot in mono mode operation. If the same happens in
mono energetic operation, the electric emergency/booster heater
is activated as a booster heater.

Additional features

- Suitable for underfloor and radiator heating systems

- Preferred for low temperature heating systems

- Still extracts heat from the outdoor air at –20°C outside
temperature

- Corrosion-protected, external casing made from hot-dipped
galvanised sheet steel plus stove-enamelled finish

- Comprises all components and safety equipment required for
operation

- Filled with non-combustible safety refrigerant

3.1 Function

3.1.1 Heating

Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side. The evaporated refrigerant is com­pressed by a compressor. This process requires electrical ener­gy. At this point, the refrigerant is at a higher temperature level.
A further heat exchanger (condenser) transfers the heat to the
heating circuit. The refrigerant then expands again and the cycle
restarts from the beginning.

At air temperatures below approx. + 7 °C, the humidity in the air
condenses as hoarfrost on the evaporator fins. This hoarfrost is
automatically defrosted. Water created by this process collects in
the defrost pan and is drained off via a hose.

!

Material losses

During the defrost cycle, the fan is switched off and the
heat pump circuit is reversed. The heat required for de­frosting is drawn from the buffer cylinder. For operation
without a buffer cylinder, observe chapter "Menu/ Menu
description/ SETTINGS/ HEATING/ STANDARD SETTING/
BUFFER OPERATION" in the WPM installation instructions.
This prevents damage to the heat pump as a result of
unfavourable conditions.

The heat pump automatically reverts to heating mode at the end
of the defrost cycle.

!

Material losses

In dual mode operation, return water from the second
heat generator may flow through the heat pump. Please
note that the return temperature must be no higher than
60 °C.

3.1.2 Cooling

!

Material losses

The heat pump is not suitable for continuous, year-round
cooling.

 Observe the application limits (see chapter "Specifi-

cation/ Data table").

!

Material losses

In cooling mode, condensate can form when the dew
point temperature is undershot.

 Take suitable measures to prevent the formation of

condensate.

Rooms are cooled by reversing the heat pump circuit. Heat is
extracted from the heating water. The evaporator transfers this
heat to the outdoor air.

Area cooling and fan cooling require the installation of the FET
remote control unit in a reference room to capture the relative hu­midity and the room temperature as part of dew point monitoring.

With fan cooling, it is also necessary to install a buffer cylinder.

Heat pump application limit

The heat pump is switched off if the outside temperature falls
below the selected lower application limit for cooling (LIMITCOOL­ING parameter).

4. Settings

The system is operated exclusively via the WPM heat pump man­ager.

 Observe the heat pump manager operating and commission-

ing instructions.

5. Maintenance and care

!

Material losses

Maintenance work, such as checking the electrical safety,
must only be carried out by a qualified contractor.

!

Material losses

 Keep the air discharge and intake apertures free

from snow and leaves.

A damp cloth is sufficient for cleaning all plastic and sheet metal
parts. Never use abrasive or corrosive cleaning agents.

 Protect the appliance from dust and dirt during building

work.

 Once a month, check that the condensate drain is work-

ing correctly (visual inspection). When doing so, check for
water collecting below or next to the appliance. See chapter
"Troubleshooting".

We recommend a regular inspection (to establish the current con­dition of the system), and maintenance by a qualified contractor if
required (to return the system to its original condition).

OPERATION

Troubleshooting

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6. Troubleshooting

Fault Cause Remedy

There is no hot
water or the
heating system
remains cold.

No power at the appli­ance.

Check the fuses/MCBs in your
distribution board. Replace the
fuses/reset the MCBs if required.
Notify your qualified contractor
if the fuses/MCBs blow/trip again
after switching the system back
on.

Water is leaking
from the appli­ance.

The condensate drain
may be blocked.

Call your qualified contractor
to have the condensate drain
cleaned out.

Condensate is
collecting on the
outside of the
appliance or on
the air hoses.

The drying out phase of
the building is not yet
complete.

This condensate should no
longer form on the appliance
after the house is approx.two
years old, providing the room is
sufficiently well ventilated and
dehumidified.

The relative humidity in
the air is high (≥60%).

Condensation should no longer
form on the appliance once
the weather conditions have
changed.

The appliance is sited in a
damp room. Damp rooms
contain increased levels
of humidity, forexample
because they are used for
drying laundry.

Ensure that the room is ade­quately ventilated and dehumid­ified. If necessary, hang your
laundry in a different room.
Use a vented tumble dryer.
Please note that condenser tum­ble dryers do not reduce the level
of humidity in the air.

The air hoses are incor­rectly fitted or poorly
sealed.
Cold air is escaping.

Check that the air hoses are
correctly fitted and sealed. If
necessary, contact your qualified
contractor.

Note

Even when the condensate is draining away correctly, it
is not unusual for water to drip from the appliance onto
the floor.

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

Sample type plate

Montageanweisung beachten! Dichtheit geprüft!

Made in Germany

*xxxxxxxxxxxxxxxxxx*

26_03_01_1736

1

1 Number on the type plate

INSTALLATION

Safety

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INSTALLATION

7. Safety

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

7.1 General safety instructions

We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.

7.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations
and instructions.

The tested appliance conforms to IEC 61000-3-12.

7.3 Operation of the appliance in buildings with
combustion equipment

As the appliance can produce negative pressure in the installa­tion room, we recommend using a tightly sealing door between
the installation room and the living space containing combustion
equipment.

If, due to its use, the installation room is connected to the extract
air system, you must also make special arrangements for a supply
air vent in the installation room, to prevent any further increase in
the negative pressure in this room. The negative pressure created
by the appliance in the installation room is heavily influenced by
the pressure drop in the outdoor air line. For this reason, the
outdoor air line in particular should be as short as possible.

8. Appliance description

At +8°C condenser temperature, the integral frost protection cir­cuit automatically starts the heating circulation pump in the heat
pump circuit, thereby ensuring circulation in all water carrying
sections.

The heat pump starts automatically when the temperature in the
heat pump circuit drops below +5°C.

8.1 Standard delivery

- Base unit

- Outside temperature sensor AFPT

- 2x Immersion/contact sensor TAFPT

- Transport aid

- 4x Sliding block

WPL09IKCSclassic | WPL17IKCSclassic

- 2 dummy covers

8.2 Required accessories

If installing a new appliance

- 2x air routing accessory LSWP315AWGSet

The air routing accessory is available in different lengths (0.7-4m),
in silver (SR) or grey (GL), and as a version for light wells (L):

- LSWP315-0.7SAWGSRSet

- LSWP315-2SAWGSRSet

- LSWP315-3SAWGSRSet

- LSWP 315-4 S AWG SR set

- LSWP315-0.7SAWGGLSet

- LSWP 315-2 S AWG GL set

- LSWP315-3SAWGGLSet

- LSWP315-4SAWGGLSet

- LSWP315-0.7SAWGLSet

- LSWP315-2SAWGLSet

- LSWP 315-3 S AWG L set

- LSWP315-4SAWGLSet

If using existing air hoses and wall outlets AWG315

- 2x quick-fit adaptor ZSA315

8.3 Additional accessories

- Water softening fitting HZEA

- Condensate pump PK 10

- Internet Service Gateway ISG

- Remote control FET

- FE7 remote control

- TAF PT immersion/contact sensor

9. Preparation

9.1 Sound emissions

Take the following information into account when selecting the
installation location.

Note

The appliance is designed for indoor installation, except
in damp areas.

Note

For details regarding the sound power level, see chapter
"Specification / Data table".

- Never site the appliance on joist floors.
 Ensure that the entire appliance frame is in full contact

with the substrate. Uneven substrates can increase sound
emissions.

 Never install the appliance directly below or next to a living

room or bedroom.

 Ensure that the air intake and discharge apertures in external

walls are not directed towards the neighbouring windows of
living rooms or bedrooms.

INSTALLATION

Preparation

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 Implement pipe outlets through walls and ceilings with an-

ti-vibration insulation.

9.2 Minimum clearances

WPL09ICSclassic | WPL17ICSclassic

≥500

≥600

≥300

≥100

D0000065698

 Maintain the minimum clearances to ensure trouble-free op-

eration of the appliance and facilitate maintenance work.

WPL09IKCSclassic | WPL17IKCSclassic

≥100

≥500≥300

≥600

D0000065699

 Maintain the minimum clearances to ensure trouble-free op-

eration of the appliance and facilitate maintenance work.

INSTALLATION

Preparation

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9.3 Preparing the installation location

 Observe chapter "Sound emissions".

!

Material losses

The installation room floor must be water resistant. Dur­ing appliance operation, the outdoor air releases up to
50l of condensate per day. If humidity levels in the in­stallation room are high, condensate may form on the
appliance and air hoses. If the condensate drain is not
installed correctly or if maintenance is not carried out
properly, water may leak out. We recommend installing
a drain in the floor of the installation room.

The room in which the appliance is to be installed must meet the
following conditions:

- No risk from frost

- The room must not be subject to a risk of explosions arising
from dust, gases or vapours.

- If installing the appliance in a plant room together with other
heating equipment, ensure that the operation of other heat­ing equipment will not be compromised.

- Minimum volume of the installation room. The minimum
volume of the installation room is assured if the minimum
clearances are observed.

- Load bearing floor (for the weight of the appliance, see chap­ter "Specification/ Data table").

 Ensure that the substrate is level, even, solid and permanent.
 For installation on floating screeds, make provisions for quiet

heat pump operation.

 Isolate the installation surface around the heat pump by

means of a recess. After completing the installation, seal the
recess with a waterproof, sound insulating material, suchas
silicone.

1 2 3 54

26_03_01_1466

1 Concrete base
2 Impact sound insulation
3 Floating screed
4 Floor covering
5 Recess

Note

For details of the dimensions and positions of the air
intake and discharge apertures, as well as the outlets for
hydraulic lines and power cables, see chapter "Specifica­tion/ Dimensions and connections".

9.4 Wall outlet

Note

The air duct connection on the wall outlet is oval. When
selecting the installation position for the wall outlet, note
how the connections on the appliance are arranged, to
ensure that the air hose will not have to be twisted.

 Observe the wall outlet installation instructions.

AWG315SRPremium | AWG315GLPremium

473

483

325-500

440

342

512

487

440

274

475

89

D0000068135

AWG315LPremium

479

473

325-500

440

342

509

477

440

274

475

89

D0000068596

INSTALLATION

Preparation

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9.4.1 WPL09ICSclassic | WPL17ICSclassic

 Select one of the possible installation versions.

Air routing with a shaft: Through an exterior wall | Through two external walls around a corner

≥

600

≥

600

≥

1000

≥

1000

≥100

≥

R170

≥500

≥2000

≥2000

≥1700

≥1125

≥

358

≥1700

≥2000

≥120

D0000069076

9.4.2 WPL09IKCSclassic | WPL17IKCSclassic

 Select one of the possible installation versions.

Air routing without a shaft: Through an exterior wall

≥2000

≥

100

≥

1000

≥1630

≥

R170

≥2000

≥120

≥1630

≥2000

≥450

D0000069077

INSTALLATION

Preparation

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Air routing without a shaft: Through two external walls around a corner

LSWP 315-0.7 S AWG SR Set LSWP 315-0.7 S AWG GL Set

236930 237762
Length m 0.7 0.7

≥450≥450

≥2000

≥1640

≥670

≥

1075

≥500≥450

≥2000

≥1640

≥1125

≥

670

D0000070724

9.4.3 Example: Installation with an air hose of 2m in length

≥

600

≥

1000

≥2000

1700

R170

500 300

1122

539

D0000073820

Note

If the distance from the back of the appliance to the wall
is less than the stated dimension, trim the air hose.
If the distance from the back of the appliance to the wall is
greater than the stated dimension, use a longer air hose.

 Observe chapter "Routing air hoses".

9.4.4 Insulating the brickwork

Ensure that no cold bridges form between the brickwork and the
wall outlets. Cold bridges can result in condensation forming in
the brickwork.

 If necessary, fit suitable insulation between the brickwork

and the wall outlets.

9.5 Preparing the electrical installation

WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.

WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. Ensure the appliance can be
separated from the power supply by an isolator that dis­connects all poles with at least 3mm contact separation.
This requirement can be met by using contactors, circuit
breakers, fuses/MCBs, etc.

!

Material losses

The specified voltage must match the mains voltage.

 Observe the type plate.

!

Material losses

Provide separate fuses/MCBs for the three power circuits,
i.e. those of the appliance, the control unit and the elec­tricemergency/booster heater.

INSTALLATION

Installation

12 |WPL ICS classic | WPL IKCS classic www.stiebel-eltron.com

!

Material losses

Provide common fuses/MCBs for the appliance control
cable and the heat pump manager.

 Use cables with the relevant cross-sections. Observe the ap-

plicable national and regional regulations.

MCB/fuse
rating

Assignment Cable cross-section

1x B 16 A

Compressor
(single phase)
WPL09ICSclassic
WPL09IKCSclassic

2.5 mm² for routing through a wall

1.5 mm² when routing on a wall or in an
electrical conduit on a wall

1x B 25 A

Compressor
(single phase)
WPL17ICSclassic
WPL17IKCSclassic

4.0 mm² when routing in a wall

2.5 mm² when routing above the surface

1x B 16 A Control unit 1.5 mm²
2x B 16 A Electric emergency/

booster heater

2.5 mm²

The electrical data can be found in the chapter "Specification". The
bus requires a J-Y (St) 2x2x0.8mm² cable.

Note

The appliance includes an inverter for the variable speed
compressor. In the event of a fault, inverters can cause DC
residual currents. If RCDs are provided, they must be type
B, AC/DC-sensitive, with 30mA fuse protection.
A DC residual current can block type A RCDs.

 Ensure that the appliance power supply is discon-

nected from the distribution board.

9.6 Buffer cylinder

!

Material losses

A buffer cylinder with diffusion-proof insulation is es­sential to enable cooling by means of fan convectors. The
emergency/booster heater must be connected.

Note

When providing cooling via an underfloor heating system
no buffer cylinder is required.

We recommend the use of a buffer cylinder to ensure trouble-free
appliance operation.

The buffer cylinder provides hydraulic separation of the volume
flows in the heat pump circuit and heating circuit, and also serves
as an energy source for defrosting.

 If operating the appliance without a buffer cylinder, observe

the details specified in chapter “Minimum flow rate with in­dividual room control via FET/ FE7 in systems without buffer
cylinder”.

Note

For operation without a buffer cylinder, we recommend
installing an electric emergency/booster heater (DHC).

 If you do not install an emergency/booster heater,

activate the WW LEARNING FUNCTION parameter in
the WPM heat pump manager for fault-free opera­tion.

10. Installation

10.1 Transport

If possible, transport the appliance to the installation site on the
non-returnable pallet. Alternatively, transport the appliance using
a sack truck, creeper board or tension belt, which can be posi­tioned around the left-hand adjustable feet as a carrying strap.

 When transporting the appliance, be aware of its centre of

gravity.

 Protect the appliance against heavy impact during transport.

- If the appliance needs to be tilted during transport, this
must only be for a short time and onto the r.h. side panel.
Ensure that the John Guest connectors point upwards during
transport.

- The longer the appliance is tilted, the greater the distribution
of refrigerant oil inside the system.

 Wait approximately 30minutes before starting the appliance

after it has been tilted.

 If possible, transport the appliance in its packaging.

!

Material losses

If the appliance is transported without packing and with­out using a pallet, its outer casing may be damaged.
To prevent this, remove the side and front panels (see
chapter "Fitting the appliance casing").

Note

You may need to remove the front panel to manoeuvre
the appliance through a door (see chapter "Fitting the
appliance casing").

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766

D0000073954

INSTALLATION

Installation

www.stiebel-eltron.com WPL ICS classic | WPL IKCS classic | 13

10.1.1 Transport using a transport aid

To facilitate transport, you can fit a transport aid to the r.h. side
panel of the appliance (see chapter "Appliance description/ Fur­ther accessories").

 Remove the r.h. side panel of the appliance (see chapter "Fit-

ting the appliance casing").

D0000073928

1

1 Transport aid

 Fit the transport aid to the appliance frame using the screws

provided.

 Tilt the appliance through about 45° onto its r.h. side.
 Lift the appliance carefully.
 Transport the appliance to the installation location.

10.2 Siting

Note

There are fixing screws at the bottom of the appliance
frame to secure the front and side panels.

 When siting the appliance, observe the air discharge

direction.

 Position the appliance on the prepared substrate.

D0000078840

 Push the sliding blocks supplied under the adjustable feet,

so the appliance can be moved more easily to the required
position.

 Observe minimum clearances (see chapter "Preparations/

Minimum clearances").

 Level the appliance vertically by turning the height-adjusta-

ble feet.

10.3 Flow and return connection

!

Material losses

In cooling mode, condensate can form when the dew
point temperature is undershot.

 Take suitable measures to prevent the formation of

condensate.

D0000069079

27

6

5

4

3

1

1 Manual air vent valve
2 "Safety valve drain" connection
3 "Heat exchanger flow" connection
4 "Heat exchanger return" connection
5 "Heating return" connection
6 "Heating flow" connection
7 Condensate drain outlet

 If only one return connection is used, seal off the one that is

unused.

Cooling with a buffer cylinder

 Install an immersion/contact sensor in the heating flow,

downstream of the buffer cylinder.

10.4 Fitting the push-fit connectors

Note

The plastic push-fit connectors are not suitable for instal­lation in the DHW line.

 Install the push-fit connectors only in the heating

circuit.

Material losses

Tighten the screw cap of the push-fit connector by hand.
Never use a tool.

Material losses

To ensure the push-fit connector is held securely, pipes
with a surface hardness>225HV (e.g. stainless steel)
must have a groove.

 Using a pipe cutter, cut a groove (depth ap-

prox.0.1mm) at a defined distance from the end of
the pipe.

- Pipe diameter 22mm: 17±0.5mm

- Pipe diameter 28mm: 27.5±0.5mm

How the push-fit connectors work

The push-fit connectors are equipped with a retainer with stain­less steel serrations and an O-ring for sealing. The push-fit con­nectors also have a "twist and secure" function. Simply turning
the screw cap by hand will secure the pipe in the connector and
push the O-ring against the pipe to seal it.

INSTALLATION

Installation

14 |WPL ICS classic | WPL IKCS classic www.stiebel-eltron.com

Making the push-fit connection

The connector must be in its relaxed position before the pipe is
inserted. In this position, there is a small gap between the screw
cap and main body.

26_03_01_0693

3

1

2

4

1 Retainer
2 Screw cap
3 Gap between screw cap and main body
4 Main body

26_03_01_0693

Pipe Ø 22 mm
Depth of insertion A 33,3 mm

!

Material losses

Pipe ends must be deburred.

 Always use a pipe cutter to trim pipes.

 Push the pipe past the O-ring into the push-fit connector

until it reaches the prescribed insertion depth.

 Tighten the screw cap by hand against main body as far as it

will go. This secures the push-fit connection.

Undoing the push-fit connection

If the push-fit connectors later need to be undone, proceed as
follows:

 Turn the screw cap anti-clockwise until there is a narrow gap

of approx. 2mm. Press the retainer back with your fingers
and hold on to it.

 Pull out the inserted pipe.

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10.5 Heating water connection

!

Material losses

The heating system to which the heat pump is connected
must be installed by a qualified contractor in accordance
with the water installation drawings that are part of the
technical guide.

 Before connecting the heat pump, flush the pipework thor-

oughly with suitable water. Foreign bodies, such as welding
pearls, rust, sand or sealant can impair the operational relia­bility of the heat pump.

 Connect the heat pump on the heating water side. Check for

tightness.

 Ensure that the heating flow and return are connected

correctly.

 Provide thermal insulation in accordance with applicable

regulations.

 When sizing the heating circuit, observe the internal pressure

differential (see chapter "Specification/ Data table").

The pressure hoses acting as anti-vibration insulation for direct
connection of the on-site pipework are integrated inside the ap­pliance.

10.6 Oxygen diffusion

!

Material losses

Do not use open vented heating systems. Use oxygen
diffusion-proof pipes in underfloor heating systems with
plastic pipework.

In underfloor heating systems with plastic pipes that are per­meable to oxygen and in open vented heating systems, oxygen
diffusion may lead to corrosion on the steel components of the
heating system (e.g. on the indirect coil of the DHW cylinder, on
buffer cylinders, steel radiators or steel pipes).

 In the case of oxygenation, separate the heating system be-

tween the heating circuit and the buffer cylinder.

!

Material losses

The products of corrosion (e.g.rusty sludge) can set­tle in the heating system components, which may re­sult in a lower output or fault shutdowns due to reduced
cross-sections.

10.7 Second heat generator

For dual mode systems, always connect the heat pump into the
return of the second external heat source, e.g. oil boiler.