STIEBEL ELTRON WPL 33 HT Operation And Installation

OPERATION AND INSTALLAT ION

Air | water heat pump

» WPL 33 HT

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 ���������������������������������������4

3.1 Function ___________________________________________________________ 5

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

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

6. Troubleshooting ����������������������������������������������5

INSTALLATION

7. Safety ���������������������������������������������������������� 6

7.1 General safety instructions ____________________________________ 6

7.2 Instructions, standards and regulations ____________________ 6

7.3 Operation of the appliance in buildings with
combustion equipment _________________________________________ 6

8. Appliance description ���������������������������������������6

8.1 Standard delivery ________________________________________________ 6

8.2 Required accessories ___________________________________________ 6

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

9.1 Sound emissions _________________________________________________ 7

9.2 Minimum clearances ____________________________________________ 7

9.3 Preparation of the installation site ___________________________ 8

9.4 Electrical installation____________________________________________ 9

9.5 Buffer cylinder __________________________________________________ 10

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

10.1 Transport _________________________________________________________ 10

10.2 Outdoor installation ____________________________________________ 10

10.3 Indoor installation ______________________________________________ 11

10.4 Heating water connection _____________________________________ 11

10.5 Oxygen diffusion ________________________________________________ 11

10.6 Filling the heating system ____________________________________ 12

10.7 Minimum flow rate _____________________________________________ 12

10.8 Setting the flow rate on the heating side __________________ 12

10.9 Heat meter _______________________________________________________ 13

10.10 High limit safety cut-out for underfloor heating
systems ___________________________________________________________ 13

10.11 Condensate drain _______________________________________________ 13

10.12 Checking the condensate drain ______________________________ 14

10.13 Second heat generator ________________________________________ 14

11. Electrical connection ��������������������������������������� 14

11.1 General ___________________________________________________________ 14

11.2 Cable routing for outdoor installation ______________________ 14

11.3 Cable routing for indoor installation _______________________ 14

11.4 Making the electrical connections ___________________________ 15

12. Fitting casing parts ���������������������������������������� 15

12.1 Fitting the casing sections for outdoor installation ______ 15

12.2 Fitting casing parts for indoor installation ________________ 16

13. Routing the air hoses �������������������������������������� 16

13.1 Fitting the air hoses ____________________________________________ 17

13.2 Insulating the wall outlets ____________________________________ 18

14. Commissioning ��������������������������������������������� 18

14.1 Checks before commissioning________________________________ 18

14.2 Settings ___________________________________________________________ 19

15. Appliance shutdown ��������������������������������������� 19

15.1 Standby ___________________________________________________________ 19

15.2 Power interruption _____________________________________________ 20

16. Troubleshooting �������������������������������������������� 20

16.1 Elements on the IWS HT _______________________________________ 20

16.2 Resetting the high limit safety cut-out _____________________ 21

16.3 Fan noise _________________________________________________________ 21

17. Maintenance ������������������������������������������������ 22

17.1 Clean condensate pan and drain ____________________________22

18. Specification ������������������������������������������������ 24

18.1 Dimensions and connections _________________________________ 24

18.2 Wiring diagram _________________________________________________ 26

18.3 Output diagrams ________________________________________________ 28

18.4 Data table ________________________________________________________ 29

GUARANTEE

ENVIRONMENT AND RECYCLING

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SPECIAL INFORMATION

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.

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

 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.

- 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 isolation from the mains supply, parts
of the appliance may remain live for up to 2 min­utes since the capacitors still have to discharge
into the inverter.

- Never interrupt the power supply, even outside
the heating season. The system's active frost pro­tection is not guaranteed if the power supply is
interrupted.

- 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.

1.2.2 Symbols, type of risk

Symbol Type of risk

!

1.2.3 Keywords

KEYWORD Meaning

DANGER Failure to observe this information will result in serious

WARNING Failure to observe this information may result in serious

CAUTION Failure to observe this information may result in non-seri-

Injury

Electrocution

injury or death.

injury or death.

ous or minor injury.

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OPERATION

Safety

1.3 Other symbols in this documentation

Note

General information is identified by the adjacent symbol.

 Read these texts carefully.

Symbol Meaning

!

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

tion you need to take is described step by step.

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

Appliance disposal

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.

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 inappro­priate. Observation of this document is also part of the correct
use of the unit.

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.

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.

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 deviates from the test conditions defined in the first
paragraph of this section, 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.

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 within the applica­tion limits listed 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-do-

WARNING Injury

!

 For safety reasons, only operate the appliance with

the casing closed.

2.3 Test symbols

See type plate on the appliance.

3. Appliance description

The appliance is an air|water heat pump that operates as a heat­ing heat pump. Heat is extracted from the outdoor air at a low
temperature level, and is then transferred to the heating water at
a higher temperature. The heating water can be heated up to a
flow temperature of 75 °C.

With the appropriate accessories, this appliance may be installed
internally or externally.

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

Operational characteristics:

- Suitable for underfloor and radiator heating systems

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

- Corrosion-protected, external casing made from zinc-plated
sheet steel plus powder-coated finish.

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OPERATION

Settings

- Comprises all components and safety equipment required for
operation.

- Filled with non-combustible safety refrigerant.

Note

To control the heating system, you will need the heat
pump manager “WPM”.

3.1 Function

Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side. The now evaporated refrigerant is
compressed with one or two compressors. This process requires
electrical energy. Now, the refrigerant is at a higher temperature
level and transfers the heat drawn from the air via an additional
heat exchanger (condenser) to the heating system. 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 defrosting process
collects in the defrost pan and is drained off via a hose.

Material losses

!

In 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 the in­formation in the WPM instruction manual and the BUFF­ER OPERATION parameter in the SETTINGS/ STANDARD
SETTING menu.
Otherwise the heating water freezes under 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.

4. Settings

The appliance is controlled by the heat pump manager WPM and
does not require any special operator actions.

 Please observe the heat pump manager operating and instal-

lation instructions.

5. Maintenance and care

Material losses

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

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”.

Material losses

Keep the air discharge and intake apertures free from
snow and leaves.

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).

6. Troubleshooting

Fault Cause Remedy

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

Water is leaking
from the appli­ance.

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

Outdoor installa­tion: Condensate
is collecting on
the outside of the
appliance.

The fan runs
when the
compressor is
switched off.

The appliance
produces rhyth­mic scraping or
grinding noises.

No power at the appli­ance.

The condensate drain
may be blocked.

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

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

The appliance is sited
in a damp room. Damp
rooms are those where
humidity in the air is
high. They may, forex­ample, be used for drying
laundry.

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

The heat pump is extract­ing heat from the outdoor
air to heat the building.
This can cause the hu­midity in the outdoor air
to accumulate as dew or
frost on the cooled heat
pump casing. This is not
a defect.

At outside temperatures
below 10°C, the fan is
regularly started at the
lowest speed when the
compressor is idle. This
prevents the evaporator
and fan from freezing
or icing up due to water
draining off. At tempera­tures above the freezing
point, the time between
two defrost cycles is in­creased, thereby improv­ing overall efficiency.

Ice has formed on the air
grille, on the fan blades
or in the air routing.

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.

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

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.

A change in weather conditions
should no longer cause conden­sation to form on the appliance.

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.

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

Call your qualified contractor
(see chapter “Installation/ Trou­bleshooting/ Fan noises”).

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INSTALLATION

Safety

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, notify your qualified contractor. To
facilitate and speed up your request, provide the number from the
type plate. The type plate is located at the front top, on the right
or left hand side of the casing.

Sample type plate

Montageanweisung beachten! Dichtheit geprüft!

1 Number on the type plate

*xxxxxxxxxxxxxxxxxx*

Made in Germany

1

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.

7.3 Operation of the appliance in buildings with

26_03_01_1736

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 allow for a supply air valve in the
installation room in this particular case to prevent any further
increase in the negative pressure in the installation 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

For outdoor installation the appliance offers additional frost pro­tection of the heating water pipes. The integral frost protection
circuit starts the circulation pump in the heat pump circuit auto­matically at +8 °C condenser temperature, and thereby ensures
circulation in all water-filled sections. The heat pump is started
automatically no later than when the temperature inside the buffer
cylinder drops below +5 °C.

8.1 Standard delivery

The following are delivered with the appliance:

- Type plate

8.2 Required accessories

You require the following accessories to operate the heat pump:

- WPM3 heat pump manager

- Remote control

- Buffer cylinder

- Contact sensor

- Immersion sensor

6 | WPL 33 HT www.stiebel-eltron.com

INSTALLATION

Preparation

- Accessory for external installation WPL 33 HT

- Accessory for indoor installation WPL 33 HT

9. Preparation

9.1 Sound emissions

The appliance is louder on the air intake and air discharge sides
than on the two enclosed sides. Take the following information
into account when selecting the installation location.

Note

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

9.1.1 Sound emissions for external installation

- Lawn areas and shrubs help reduce the spread of noise.

- Noise propagation can also be reduced through dense pali­sades or similar.

 Ensure that the entire appliance frame is in full contact

with the substrate. Uneven substrates can increase sound
emissions.

 Ensure that the air intake direction is the same as the dom-

inant wind direction. Air should not be drawn in against the
wind.

 Ensure that the air intake and air discharge are never direct-

ed towards noise-sensitive rooms of the house, e.g.bed­rooms, or neighbouring houses.

 Avoid installation on large, echoing floor areas, e.g.tiled

floors.

 Avoid installation between reflective building walls. Reflect-

ing building walls can increase the noise level.

9.1.2 Acoustic emissions for internal installation

- 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.

 Isolate the installation surface. See chapter “Preparing the

installation location/ Indoor installation”.

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

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

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

ti-vibration insulation.

9.2 Minimum clearances

9.2.1 Outdoor installation

≥700

≥500

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

eration of the appliance and facilitate maintenance work.

 Never install the appliance in a recess. Two sides of the ap-

pliance must remain exposed.

 In order to prevent air "short circuits", maintain the minimum

clearances in the case of surrounding structures and in par­ticular in the case of cascades. Maintain the flow rate on the
heat source side (see chapter "Specification / data table").

Material losses

!

Please note that both the flow of outdoor air into the
appliance, and the flow of exhaust air from the appliance
must be unimpeded.
If the air intake and discharge of the appliance are ob­structed by surrounding objects, this may cause a thermal
short circuit.

 Ensure that the appliance is not fully enclosed by objects

such as buildings, walls or fences.

If the air discharge side of the appliance faces the wall of a house,
the cool air from the air discharge may cause condensate to form
on this wall.

Material losses

!

The air flow rate through the appliance must not fall
below the minimum level. If the air flow rate falls below
the minimum level, trouble-free operation of the appli­ance is not guaranteed.

 Ensure that the minimum air flow rate is maintained

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

≥2000

≥500

≥1000

D0000019241

91_00_00_0036

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INSTALLATION

Preparation

9.2.2 Indoor installation

≥500

≥500

≥300

≥500

Example: Foundations with recess

1

1390

70

270

4

d01d02

2

50150

1 Air discharge
2 Air intake
3 Main wind direction
4 Entry supply lines
d01 Heat pump flow
d02 Heat pump return

 Ensure that the foundations offer an adequate recess.

Example: Installation on foundations

3

800

D0000023464

≥1000

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

eration of the appliance and facilitate maintenance work.

9.3 Preparation of the installation site

 Observe chapter “Sound emissions”.
 Observe chapter “Minimum clearances”.
 Ensure that the appliance is accessible from all sides.
 Ensure that the substrate is level, even, solid and permanent.

9.3.1 Outdoor installation

WARNING Injury

!

The discharged cold air can cause condensation to be
formed in the vicinity of the air outlet.

 Ensure that no risk of slipping due to wet conditions

or ice formation occurs on adjacent footpaths and
driveways at low temperatures.

 Provide a recess (space) in the base to enable supply pipes/

cables to be routed into the appliance from below.

Note

To facilitate connection to the appliance, we recommend
using flexible supply pipes/cables in the case of outdoor
installation.

D0000019242

4

3

5

1 2

6

A Depth of frost line
1 Heating flow
2 Heating return
3 Conduit for supply lines
4 Foundation
5 Gravel bed
6 Drainage pipe
7 Condensate drain
8 Power cable

 Also protect all supply lines/cables against humidity, damage

and UV radiation by means of a conduit.

 Allow the conduits for the supply lines to protrude slightly

above the foundations. Ensure that no water can enter the
conduits.

 Only use weather-resistant cables.

8

A

7

D0000070997

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INSTALLATION

Preparation

 Protect the flow and return lines against frost with sufficient

thermal insulation. The thermal insulation must be at least
twice as thick as the diameter of the pipe. Provide thermal
insulation in accordance with applicable regulations.

Note

When routing the condensate hose, observe chapter “In­stallation/ Condensate drain”.

9.3.2 Indoor installation

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 where the appliance is 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”).

 For installation on floating screeds, make provisions for quiet

heat pump operation.

1 2 3 54

 Isolate the installation surface around the heat pump by

means of a recess. After completing the installation, seal the
recess with a water-impervious and sound insulating materi­al, such as silicone for example.

Observe the following information:

- Connect the heating circuit flow and return lines via flexible
pressure hoses. Suitable pressure hoses are listed in chap­ter "Appliance description / Required accessories for indoor
installation".

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 / indoor installation".

9.4 Electrical installation

WARNING Risk of electrocution!
Carry out all electrical connection and installation work
in accordance with national and regional regulations.

WARNING Risk of electrocution!
Only use a permanent connection to the power supply.
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. 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.

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

plicable national and regional regulations.

MCB/fuse
rating

C 32 A Heat pump 10.0 mm²
B 16 A

B 16 A Control unit 1.5 mm²

The electrical specifications are given in the "Data table". You
require a J-Y (St) 2x2x0.8mm² cable as a BUS cable.

Assignment Cable cross-section

Electric emergen­cy/booster heater
(DHC)

2.5 mm²

Note

Provide separate fuses/MCBs for the 3 power circuits of
the appliance, the control unit and the electricemergen­cy/booster heater.

26_03_01_1466

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

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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 have to
be type B AC/DC-sensitive.
A DC residual current can block type A RCDs.

 Ensure that the appliance power supply is discon-

nected from the distribution board.

INSTALLATION

Installation

9.5 Buffer cylinder

A buffer cylinder is recommended 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.

 For operation without a buffer cylinder, observe the details

in chapter “Minimum flow rate with individual room control
via remote control in systems without buffer cylinder”.

10. Installation

10.1 Transport

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

gravity.

- The centre of gravity is in the area where the compressors
are located.

- Lifting slings for handling the standard appliance can be
hooked in anywhere on the bottom of the frame.

 Protect the appliance against heavy impact during transport.

10.2 Outdoor installation

 Pay attention to the air discharge direction.
 Position the standard appliance on the prepared substrate.

Material losses

Observe the torque of the flow meter (see chapter “Spec­ification/Data table”) when carrying out the following
procedure.

1

2

3

- If the appliance needs to be tilted during transport, this must
only be for a short time and it must only be titled on one of
its longitudinal sides. When transporting the appliance, en­sure the compressor is on the upper appliance side.

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

 Wait approx. 30 minutes before starting the appliance after it

has been tilted.

4

5
6

7

D0000071298

8

1 Connector
2 Union nut
3 Pipe bend, heating circuit return
4 Heating flow
5 Flow meter
6 Heating return
7 Entry supply lines
8 Condensate hose

 Undo the union nut from the heating flow.
 Turn the connector through approx. 30°.
 Retighten the union nut.
 Install the pipe bend for the heating circuit return (compo-

nent from "Accessories for outdoor installation").

 Install the pressure hoses and pipe bends for the heating

circuit flow and return (part of "Accessories for outdoor
installation").

 Route the water pipes and electrical cables into the appliance

from below through the knock-outs in the base.

D0000033981

10 | WPL 33 HT www.stiebel-eltron.com