STIEBEL ELTRON WPE-I 33 H 400 Premium Instruction Manual

OPERATION AND INSTALLATION
Ground source heat pump
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CONTENTS
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������4
1.1 Relevant documents_____________________________________________ 4
1.2 Safety instructions_______________________________________________ 4
1.3 Other symbols in this documentation _______________________ 4
1.4 Units of measurement __________________________________________ 4
1.5 Standardised output data ______________________________________ 4
2. Safety����������������������������������������������������������5
2.1 Intended use______________________________________________________ 5
2.2 Safety instructions_______________________________________________ 5
2.3 Test symbols ______________________________________________________ 5
3. Appliance description ���������������������������������������5
4. Operation �����������������������������������������������������5
5. Maintenance and care ���������������������������������������6
6. Troubleshooting ����������������������������������������������6
6.1 Other problems __________________________________________________ 6
INSTALLATION
7. Safety����������������������������������������������������������6
7.1 General safety instructions ____________________________________ 6
7.2 Instructions, standards and regulations ____________________ 6
8. Appliance description ���������������������������������������6
8.1 Standard delivery________________________________________________ 6
8.2 Accessories________________________________________________________ 7
9. Preparation ���������������������������������������������������7
9.1 Sound emissions_________________________________________________ 7
9.2 Minimum clearances____________________________________________ 7
9.3 Preparation of the installation site___________________________ 8
9.4 Wall outlet_________________________________________________________ 8
9.5 Preparing the electrical installation _________________________ 9
10. Installation����������������������������������������������������9
10.1 Transport __________________________________________________________ 9
10.2 Siting _______________________________________________________________ 9
10.3 Removing the casing parts ___________________________________ 10
10.4 Installing the heat source system ___________________________ 10
10.5 Flow and return connection __________________________________ 10
10.6 Oxygen diffusion________________________________________________ 11
10.7 Filling the heating system ____________________________________ 11
10.8 DHW heating_____________________________________________________ 12
10.9 Operation with buffer cylinder_______________________________ 12
11. Electrical connection��������������������������������������� 12
11.1 General ___________________________________________________________ 12
11.2 Checks before electrical connection ________________________ 13
11.3 Access to the terminal area___________________________________ 13
11.4 Terminal area____________________________________________________ 13
11.5 Dynamic allocation _____________________________________________ 13
11.6 Electrical connection___________________________________________ 13
11.7 Sensor installation______________________________________________ 13
11.8 High limit safety cut-out for STB-FB area heating
system ____________________________________________________________ 14
11.9 Internet Service Gateway ISG ________________________________ 14
11.10 Internal bus connection _______________________________________ 14
12. Charging the brine circuit ��������������������������������� 14
12.1 Mixing ratio ______________________________________________________ 14
12.2 Charging the brine circuit_____________________________________ 14
12.3 Check the brine concentration _______________________________ 15
13. Commissioning ��������������������������������������������� 15
13.1 Checks before commissioning________________________________ 15
13.2 Manual test of connected components _____________________ 16
13.3 Checking for unusual noises__________________________________ 16
13.4 Connecting to the internet ____________________________________ 16
13.5 Locking commissioning mode________________________________ 16
13.6 Heating curve adjustment during commissioning _______ 16
13.7 Appliance handover ____________________________________________ 17
14. Shutting down the system �������������������������������� 17
15. Troubleshooting �������������������������������������������� 17
15.1 BM card status display_________________________________________ 17
15.2 Fault message ___________________________________________________ 17
15.3 Fault table________________________________________________________ 17
16. Maintenance ������������������������������������������������ 18
17. Decommissioning ������������������������������������������ 18
18. Specification ������������������������������������������������ 18
18.1 Approximate current strength values_______________________ 18
18.2 Dimensions and connections _________________________________ 20
18.3 Wiring diagram _________________________________________________ 21
18.4 Output diagrams ________________________________________________ 22
18.5 Data table ________________________________________________________ 30
19. Appendix���������������������������������������������������� 32
19.1 Fault table________________________________________________________ 32
19.2 Commissioning checklist ______________________________________ 34
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 physi-
cal, 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. Cleaning and
user maintenance must not be carried out by
children without supervision.
- 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 discon-
nects 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.
- In dual mode operation, return water from
the second heat generator may flow through
the heat pump. Please note that the return
water temperature may be a maximum of
65°C.
- The appliance can be used for active and pas-
sive cooling. This however, is only possible in
conjunction with a suitable hydraulic circuit.
- Only qualified contractors may perform main-
tenance work, such as electrical safety checks.
- We recommend a regular inspection (to es-
tablish the current condition of the system),
and maintenance by a qualified contractor if
required (to return the system to its intended
condition).
- Following isolation from the mains supply,
parts of the appliance may remain live. This
is because the condensers on the inverter
still have to discharge. When the condensers
have discharged, the LEDs on the inverter stop
flashing.
- Do not perform a hard reset of the appliance
by unscrewing the fuse. This may damage the
appliance.
- Never interrupt the power supply, even out-
side the heating season. The system's active
frost protection is not guaranteed if the power
supply is interrupted.
- There is no need to shut the system down in
summer. The programming unit has an auto-
matic summer/winter changeover.

OPERATION
General information
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OPERATION
1. General information
The chapters "Special information" and "Operation" are intended
for appliance 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 Relevant documents
Operating instructions for the programming unit
Commissioning instructions for the programming unit
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.
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 environmen-
tal 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 oth-
erwise.
1.5 Standardised output data
Information on determining and interpreting the specified stand-
ardised output data
1.5.1 Standard: EN 14511, EN 14825
The output data specifically mentioned in text, diagrams and
technical datasheets has been calculated according to the test
conditions of the standard shown in the heading of this section.
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
this method deviates from the conditions defined in the norm
shown in the heading 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.
A confirmation of the specified output data can only be obtained
if the test conducted for this purpose is also performed in ac-
cordance with the conditions defined in the norm shown in the
heading of this section.
!
!

OPERATION
Safety
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2. Safety
2.1 Intended use
The appliance is designed for:
- Heating rooms
- Cooling rooms
- Heating of DHW
Observe the operating limits listed in chapter "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-
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 inappropri-
ate. Observation of these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.
2.2 Safety instructions
- Only recognised, qualified contractors may carry out the
electrical work and installation of the heating circuit.
- Work on the refrigerant circuit must only be carried out by
a recognised and qualified refrigeration engineer or by our
customer service engineer.
- 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 in-
stalled and all safety equipment has been fitted.
- Protect the appliance from dust and dirt during building
work.
- Have the high pressure switch checked annually by a quali-
fied contractor.
!
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 Injury
 For safety reasons, only operate the appliance with
the casing closed.
WARNING Injury
The system contains refrigerant. Refrigerant is heavier
than air. If refrigerant escapes from the appliance, it
sinks and displaces the air. There is risk of suffocation.
 Install the appliance only in rooms with adequate
ventilation.
WARNING Injury
In conjunction with naked flames, refrigerant forms a
toxic irritant gas. The gas can already be smelt at con-
centrations well below the permissible limit values.
 Leave the room until it has been adequately venti-
lated.
2.3 Test symbols
See type plate on the appliance.
3. Appliance description
The appliance is a heating heat pump suitable for use as a ground
source heat pump. The heat pump extracts energy from the heat
source medium at a low temperature level. This extracted energy
is then transferred to the heating water at a higher level, aug-
mented by the electric energy drawn by the compressor. Subject
to the heat source temperature, heating water can be heated up
to a flow temperature of 65°C.
If a DHW cylinder is integrated in the system, the appliance can
be used to heat DHW. To heat the DHW, the heating water that
has been heated by the heat pump is directed through an indirect
coil in the DHW cylinder, where it transfers its energy to the DHW.
An electric threaded immersion heater can be installed in the
buffer and DHW cylinder for use as a booster heater (see chap-
ter "Installation/ Appliance description/ Accessories/ Additional
accessories"). An external, second heat generator can also be in-
tegrated in the system as a booster heater.
The optional Internet Service Gateway ISG accessory allows the
system to be monitored via the internet.
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
A fan is installed at the top right-hand side of the appliance. The
fan is responsible for inverter cooling.
D0000094658
4. Operation
The heat pump is exclusively controlled via the programming unit.
Observe the instructions for the programming unit.

INSTALLATION
Maintenance and care
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5. Maintenance and care
!
Material losses
Only qualified contractors may perform maintenance
work, such as electrical safety checks.
A damp cloth is sufficient for cleaning all plastic and sheet metal
parts. Never use abrasive or corrosive cleaning agents.
We recommend a regular inspection (to establish the current con-
dition of the system), and maintenance by a qualified contractor if
required (to return the system to its intended condition).
6. Troubleshooting
Fault Cause Remedy
There is no hot water or
the heating system re-
mains cold.
The fuse/MCB has blown/
responded.
Check the fuses/ MCBs in
your fuse box/ distribu-
tion board.
6.1 Other problems
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your request, provide the number from
the type plate. The type plate is located at the top left on the
appliance cover.
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.
The appliance must be installed in a suitable room by a qualified
contractor in line with EN 60335-2-40. The installation room must
meet the requirements of EN378-3, sections 5.1-5.14.
The tested appliance conforms to IEC 61000-3-12.
8. Appliance description
If the heat demand of the heating system exceeds the heating
output of the heat pump, the booster heater covers the residual
heat demand.
If the hot gas function is used, the heat pump can be used to
achieve DHW temperatures over 60°C when heating without a
booster heater. The compressed refrigerant transfers the energy
absorbed by the compressor to the DHW in a hot gas heat ex-
changer. The refrigerant then flows into a second heat exchanger
in which the energy is transferred to the heating water.
The heat pump is not suitable for dry heating the screed.
8.1 Standard delivery
The following are delivered with the appliance:
- Outside sensor
- Immersion/ contact sensor
- Snap-on ferrite bead

INSTALLATION
Preparation
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8.2 Accessories
- Extension module EM 33-87
- Extension module in wall
mounted enclosure
EMW 33-87
- Hot gas set HG Set 33-87
- Remote control FE 33-87
- Instantaneous water cylinder SBS 601-1501W (SOL)
- Threaded immersion heater BGC2/60
- Flow switch (source side) FS-HP
- Room temperature sensor (for
cooling)
FEW
- Buffer cylinder (for cooling)
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
- Pressure hose SD 32-0.6 G
- Pressure hose SDB 40-0.8 G
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
- Pressure hose SD 40-0.8 G
- Pressure hose SDB 50-0.8 G
9. Preparation
Note
The appliance is designed for indoor installation, except
in damp areas.
9.1 Sound emissions
Note
For details regarding the sound power level, see the
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 emis-
sions.
 Never install the appliance directly below or next to a living
room or bedroom.
 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.
 Never install the appliance in the corner of the installation
room.
 Implement pipe outlets through walls and ceilings with an-
ti-vibration insulation.
 Use flexible supply lines.
 Secure the supply lines with structure-borne noise attenua-
tion on noise-sensitive walls.
 Ensure that the appliance feet are aligned.
9.2 Minimum clearances
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
≥500
≥500
≥300
≥500
≥1000
D0000082776
 Maintain the minimum clearances to ensure trouble-free op-
eration of the appliance and facilitate maintenance work.

INSTALLATION
Preparation
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WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
≥500≥300
≥500≥500
≥1000
D0000082777
 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".
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.
- When installing the appliance in a boiler room together with
other heating equipment, ensure that the operation of other
heating equipment will not be impaired.
- Load bearing floor (for the weight of the appliance, see chap-
ter "Specification/ Data table").
 Install the appliance, ideally on an external wall.
 Ensure that the substrate is level, even, solid and permanent.
 Install the appliance on a concrete floor with a thickness of at
least 100mm or on another base with corresponding charac-
teristics.
 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
9.4 Wall outlet
9.4.1 General
 Always ensure there is enough space for the other supply
lines in the wall outlets (see chapter "Specification/ Dimen-
sions and connections").
 Route the brine lines through separate wall outlets.
 Provide thermal insulation on the brine lines in accordance
with applicable regulations.
9.4.2 Wall outlets above ground
 Establish wall outlets in the building wall with a slight fall to
the outside (minimum inclination: 1cm every 30cm).
 Insert the wall outlets with a slight fall.
 Seal the space between the wall and wall outlet with mortar.
 Route the brine lines through the wall outlets.
 Seal the space between the brine line and wall outlet with a
suitable sealant (e.g. well foam). Ensure the brine lines are
centred in the wall outlets.

INSTALLATION
Installation
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9.4.3 Wall outlets below ground
!
Material losses
 Use waterproof wall outlets below the highest
groundwater level.
A
C
D
B
D0000082870
1
2
1
3
3
4
1 Wall outlet
2 Brine line
3 Mortar
4 Sealant
 Establish wall outlets in the building wall with a slight fall to
the outside (minimum inclination: 1cm every 30cm).
 Insert the wall outlets with a slight fall.
 Cut off the wall outlet from the top downwards at an angle to
the building wall.
 Seal the space between the wall and wall outlet with mortar.
 Route the brine lines through the wall outlets.
 Seal the space between the brine line and wall outlet with a
suitable sealant (e.g. well foam). Ensure the brine lines are
centred in 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 dis-
connects all poles with at least 3mm contact separation.
This requirement can be met by using contactors, circuit
breakers, fuses/MCBs, etc.
Note
The specified voltage must match the mains power sup-
ply. Observe the type plate.
 Use cables with the relevant cross-sections. Observe the ap-
plicable national and regional regulations.
Electrical data is provided in chapter "Specification/ Data table".
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.
A DC residual current can block type A RCDs.
 Ensure that the appliance power supply is discon-
nected from the distribution board.
10. Installation
10.1 Transport
Note
The WPE-I59 and WPE-I87 are designed for transport
with a forklift truck or similar.
 Secure the appliance during transport to prevent it
from falling off.
 Transport the appliance in its packaging in an upright posi-
tion to protect it against damage.
 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 it must only be tilted on one of
its longitudinal sides.
The longer the appliance is tilted, the greater the distribution
of refrigerant oil inside the system.
- Storage and transport at temperatures below -20°C and
above +50°C are not permissible.
10.2 Siting
 Remove the packaging material.
 Lift the appliance off the pallet with a forklift truck.
 Position the appliance on the prepared substrate.
 Maintain the minimum clearances.
 Level the appliance horizontally by adjusting the feet.

INSTALLATION
Installation
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10.3 Removing the casing parts
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
1.
2.
3.
D0000082844
 Undo the closure on the top cover.
 Pull the top of the front panel forwards.
 Remove the front panel by lifting it upwards.
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
3.
2.
1.
D0000082845
 Undo the two closures on the top cover.
 Pull the top of the front panel forwards.
 Remove the front panel by lifting it upwards.
10.4 Installing the heat source system
Note
Engineer the heat source system for the appliance ac-
cording to the technical guides.
Note
The output data specified in the data table (see "Specifi-
cation/ Data table") refer to ethylene glycol. These details
will vary as a result of different viscosity and thermal
conductivity properties.
Permitted brine:
Part number
MEG 10 Heat transfer medium as concentrate on
an ethylene glycol base
231109
MEG 30 Heat transfer medium as concentrate on
an ethylene glycol base
161696
PG 10 Heat transfer medium as concentrate on a
polypropylene glycol base
236307
PG 30 Heat transfer medium as concentrate on a
polypropylene glycol base
236306
10.4.1 Connection
 Thoroughly flush the pipework with brine before connecting
the heat pump to the heat source circuit. Foreign bodies,
such as rust, sand and sealant, can impair the operational
reliability of the heat pump.
 Place a filter (maximum mesh size 0.7mm) in the heat source
flow.
 Install the heat source flow and heat source return with all
the necessary components.
 Insulate the heat source flow and heat source return against
vapour diffusion to prevent the formation of condensate.
 Size the diaphragm expansion vessel according to the manu-
facturer's instructions. The maximum operating pressure of
the heat source is 6bar.
 Check for leaks.
10.5 Flow and return connection
10.5.1 Heating water quality
Carry out a fill water analysis before filling the system. This may,
for example, be requested from the relevant water supply utility.
!
Material losses
To avoid damage as a result of scaling, it may be neces-
sary to soften or desalinate the fill water. Always observe
the fill water limits specified in the "Specification / Data
table" chapter.
 Recheck these limits 8-12 weeks after commission-
ing and as part of the annual system maintenance.
Note
With a conductivity > 1000μS/cm, desalination treatment
is recommended in order to avoid corrosion.

INSTALLATION
Installation
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Note
Suitable appliances for water softening and desalinating,
as well as for charging and flushing heating systems, can
be obtained via trade suppliers.
Note
If you treat the fill water with inhibitors or additives, the
same limits apply as for desalination.
 Avoid chemical and oil contamination.
10.5.2 Heating water connection
!
Material losses
Ensure the supply lines are not under tension, in order
to avoid leaks.
The heating system to which the heat pump is connected must be
installed by a qualified contractor in accordance with the water
installation diagrams that are part of the technical guides.
 Thoroughly flush the pipework before connecting the heat
pump. Foreign bodies, such as rust, sand and sealant, can
impair the operational reliability of the heat pump.
 Construct the heating flow and return from a heat-resistant
and corrosion-resistant material (e.g. copper).
 Install a dirt trap (maximum mesh size 0.7mm) in the heat-
ing return in the immediate vicinity of the appliance.
 Connect the heating system to the "heating flow" and "heat-
ing return" connections. Check for leaks.
 Ensure that the heating flow and return are connected cor-
rectly.
 Install air vent valves at the required positions.
 Install the heating circuit pump in the heating flow.
 Install a fill connector with a non-return valve.
 When sizing the heating circuit, observe the maximum avail-
able external pressure differential (see chapter "Specifica-
tion/ Data table").
 Provide thermal insulation in accordance with applicable
regulations.
10.5.3 Safety valve
 In heating systems with a sealed unvented diaphragm ex-
pansion vessel, install a pressure gauge and a safety valve
(min. 20DN) with a maximum opening pressure of 6bar.
 Ensure the connection pipe of the diaphragm expansion ves-
sel has a steady fall to the safety valve.
 Install the safety valve drain with a constant fall to the dis-
charge outlet. When installing the drain, never kink the drain
hose.
 Ensure that the safety valve drain is open to the outside and
free from the risk of frost.
 Size the discharge outlet so that water can drain off unim-
peded when the safety valve is fully opened.
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 per-
meable 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).
 With heating systems that are permeable to oxygen, separate
the heating system between the heating circuit and the buff-
er cylinder.
!
Material losses
The products of corrosion (e.g. rusty sludge) can set-
tle in the heating system components, which may re-
sult in a lower output or fault shutdowns due to reduced
cross-sections.
10.7 Filling the heating system
!
Material losses
Never switch on the power before filling the system.
10.7.1 Checks before filling
- Have the pipe connections been carried out according to the
water installation plans contained in the technical guides?
- Has the dirt trap been installed in the heating return?
- Has a diaphragm expansion vessel been installed?
- In heating systems with a sealed unvented diaphragm ex-
pansion vessel, have a safety valve and a pressure gauge
been installed?
- Has a fill connector with a non-return valve been installed?
10.7.2 Filling the heating system
!
Material losses
The pressure in the heating system must not exceed 6bar.
 Vent the heating system carefully.
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
D0000083982
1
1 Drain
 Fill the heating system via the drain.
 Fully open all radiator valves.

INSTALLATION
Electrical connection
12|WPE-I H 400 Premium www.stiebel-eltron.com
 Bleed all the radiators.
 Fill the heating system via the drain.
 Repeat this process until there is no more air left in the heat-
ing system.
 Check the heating system for leaks.
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
D0000083956
1
1 Drain
 Fill the heating system via the drain.
 Fully open all radiator valves.
 Bleed all the radiators.
 Fill the heating system via the drain.
 Repeat this process until there is no more air left in the heat-
ing system.
 Check the heating system for leaks.
10.8 DHW heating
For DHW heating, a DHW cylinder with an internal indirect coil is
required (see chapter "Installation/ Appliance description/ Ac-
cessories").
 Thoroughly flush the pipework before connecting the heat
pump. Foreign bodies, such as rust, sand and sealant, can
impair the operational reliability of the heat pump.
10.8.1 DHW heating without hot gas technology
 Connect the heat pump DHW flow and heat pump DHW re-
turn from the DHW cylinder via a diverter valve to the heating
flow and heating return.
 Observe the hydraulic diagrams in the technical guides.
10.8.2 DHW heating with hot gas technology
 Connect the heat pump DHW flow and heat pump DHW re-
turn from the DHW cylinder to the hot gas DHW flow optional
and hot gas DHW return optional.
 Observe the hydraulic diagrams in the technical guides.
10.9 Operation with buffer cylinder
 Install the supplied flow sensor on the buffer outlet.
 Connect the flow sensor to the control panel.
11. Electrical connection
11.1 General
WARNING Electrocution
 Before working on the appliance, isolate it from
the power supply at the control panel.
Following isolation from the mains supply, parts of the
appliance may remain live. This is because the condens-
ers on the inverter still have to discharge. When the
condensers have discharged, the LEDs on the inverter
stop flashing.
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
 Connect the power cable only to the intended ter-
minal.
 Do not use any other terminals.
WARNING Electrocution
The inverter has a high fault current and must be earthed.
 Ensure there is a good connection between the
earth cable and the earthing contact. The cross-sec-
tion of the earth conductor must be designed
according to the maximum operating current (see
chapter "Specification/ Data table").
!
Material losses
The power cables must not be connected via a regularly
switching contactor. If an externally controlled shutdown
is necessary (e.g. by the power supply utility), this must
be performed via the "PSU/Smart Grid 1" contact. When
the contact is enabled, the heat pump will switch off with-
in a short period in a controlled manner.
Note
The heating system needs to be filled before making the
electrical connection (see chapter "Heating water con-
nection").
Connection work must only be carried out by a qualified contractor
and in accordance with these instructions.
You must have permission to connect the appliance from the rel-
evant power supply utility (PSU).
 Follow the instructions in the chapter "Preparation/ Prepar-
ing the electrical installation".
 Use appropriate electric cables in accordance with local reg-
ulations for the connections.
 Only connect the appliance to a supply system with a
short-circuit capacity greater than the values listed in the
table.
Heat pump Short-circuit capacity [MVA]
WPE-I 33 H 400 Premium 2.1
WPE-I 44 H 400 Premium 2.1
WPE-I 59 H 400 Premium 2.4
WPE-I 87 H 400 Premium 3.2

INSTALLATION
Electrical connection
www.stiebel-eltron.com WPE-I H 400 Premium|13
11.2 Checks before electrical connection
 Does the appliance have adequate fuse protection?
 Has the outside temperature sensor been positioned correct-
ly? Observe chapter "Sensor installation".
11.3 Access to the terminal area
The terminals are located inside the appliance control panel, be-
hind the front fascia.
 Remove the front panel of the appliance (see chapter "Instal-
lation/ Removing the casing parts").
 Remove the three screws on the cover panel.
 Pivot the cover panel to the side.
11.4 Terminal area

D0000083954
1
2
3
4
5
6
7
1 Cable entry
2 Space for extension module EM3 (optional)
3 BM card (internal heat pump control unit)
4 Transformer
5 EMV filter
6 Fuse protection
7 Terminal X1
11.5 Dynamic allocation
The BM card allows you some configurations. You can assign some
connections on the BM card differently. The connections that are
changeable can be recognised by the little boxes in the wiring
diagram. Please note that the connections can only be used for
the specified optional functions.
 Connect the corresponding component to the required con-
nection.
 Mark any changes made on the wiring diagram in the appli-
ance.
 Deactivate the factory-set function on the programming unit.
 Activate the new function on the programming unit.
11.6 Electrical connection
Note
In order to prevent failures in the electromagnetic field,
attach the supplied snap-on ferrite bead outside the con-
nection area on the bus cable.
Note
If the power cables do not fit through the cable entries,
use the supplied cable entries which can be cut to size.
11.6.1 Routing power cables
 Route the power cables from above through the cable entries
and into the appliance.
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
 Remove the cable entries in the control panel.
 Route the power cables through the apertures in the control
panel.
 Feed the cable entries over the power cables.
 Push the cable entries securely back into the apertures.
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
 Route the power cables through the cable entries in the con-
trol panel.
11.6.2 Power supply
X1 Heat pump
L1, L2, L3, N, PE
 Connect the power cable to the terminal.
11.6.3 Additional components
Note
 If you want to install a mixer, use one with a control
voltage of 10V.
 Connect the power cables for the other components accord-
ing to the wiring diagrams (see chapter "Specification/ Wir-
ing diagram" and "Appendix").
11.7 Sensor installation
Outside temperature sensor
The temperature sensors have a significant influence on the func-
tion of your heating system. Therefore ensure sensors are correctly
seated and well insulated.
When the sensor cable is laid in a pipe, the pipe must be sealed
to prevent escaping air.
Install the outside temperature sensor on a north or north-eastern
wall. Minimum clearances: 2.5m above the ground, and 1m to

INSTALLATION
Charging the brine circuit
14|WPE-I H 400 Premium www.stiebel-eltron.com
the side of windows and doors. In high buildings, install the out-
side temperature sensor between the second and third floor. The
outside temperature sensor should be freely exposed to the ele-
ments but not placed in direct sunlight. Never mount the outside
temperature sensor above windows, doors or air ducts. Do not
install the outside temperature sensor on reflective metal panels.
Immersion/ contact sensor
This sensor is required when using a mixer circuit.
Sensor resistance values
Temperature in °C Pt1000 sensor
Resistance in Ω
- 30 882
- 20 922
-10 961
01000
10 1039
20 1078
25 1097
30 1117
40 1155
50 1194
60 1232
70 1271
80 1309
90 1347
100 1385
110 1423
120 1461
11.8 High limit safety cut-out for STB-FB area
heating system
!
Material losses
In order to prevent excessively high flow temperatures
in the area heating system causing damage in the event
of a fault, install a high limit safety cut-out to limit the
system temperature.
11.9 Internet Service Gateway ISG
The Internet Service Gateway ISG enables you to operate the heat
pump within your local home network and via the internet when
you are away. The ISG is not supplied with power by the heat
pump.
 Observe the ISG operating instructions.
11.10 Internal bus connection
The jumpers on the BM card in the appliance are fitted at the
factory.
If a bus connection is used, the communication system requires
termination.
 Observe the EM extension module operating and installation
instructions.
12. Charging the brine circuit
Note
 Observe the regional and national regulations before
filling with heat transfer medium.
Calculate the volume of the heat source circuit. The brine volume
of the heat pump under operating conditions can be found in the
data table (see chapter "Specification").
The overall volume is equal to the required amount of brine made
by mixing undiluted glycol and water. The chloride content of the
water must not exceed 300ppm.
12.1 Mixing ratio
The brine concentration varies depending on whether a geother-
mal collector or a geothermal probe is used as the heat source.
For the mixing ratio see the table below.
Ethylene glycol Water
Geothermal probe 25 % 75 %
Geothermal collector 33 % 67 %
Propylene glycol Water
Geothermal probe 27.5% 72.5%
Geothermal collector 36.5% 63.5%
12.2 Charging the brine circuit
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
D0000083983
1
1 Drain
 Fill the brine circuit via the drain.
 Vent the brine circuit.

INSTALLATION
Commissioning
www.stiebel-eltron.com WPE-I H 400 Premium|15
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
D0000083956
1
1 Drain
 Fill the brine circuit via the drain.
 Vent the brine circuit.
12.3 Check the brine concentration
 Determine the density of the glycol/water mixture, e.g. with
a hydrometer.
Using the actual density and temperature, you can check the actual
concentration in the diagram.
Note
The quoted output data relates to ethylene glycol (see
"Specification").
1,10
1,09
1,08
1,07
1,06
1,04
1,03
1,02
1,01
1,00
0,99
0,98
-20 0 20 40 60 80 100
50 Vol.-%
0
1,05
40
33
30
25
20
10
A
26_03_01_1914
X Temperature [°C]
Y Density [g/cm³]
A Frost protection [°C]
13. Commissioning
!
Material losses
Do not operate the appliance until the heating system, the
heat source system and the hot water boiler have been
filled and vented to the correct pressure.
Note
The sensor in the heating flow and the outside sensor
must be connected so that the appliance can calculate
the required heating output.
Note
Class A messages prevent the appliance from starting.
 Identify the faults in displayed messages.
A qualified contractor must commission the appliance, make all
the settings in the programming unit, and instruct the user.
Carry out commissioning in accordance with these operating and
installation instructions and the programming unit instructions.
Our customer support can assist with commissioning, which is a
chargeable service. Observe the commissioning checklist in the
appendix of these operating and installation instructions.
Where this appliance is intended for commercial use, the regu-
lations of the relevant operational safety legislation may apply
during commissioning. For further details, check your local au-
thorising body.
13.1 Checks before commissioning
Before commissioning, check the points detailed below.
13.1.1 Heating system
- Have you filled the heating system to the correct pressure?
- Have you vented the heating system?
!
Material losses
In the case of area heating systems, observe the maxi-
mum system temperature.
13.1.2 Heat source
!
Material losses
Never use the heat pump to dry the screed by means of
the underfloor heating system.
- Have you filled the brine circuit to the correct pressure?
- Have you vented the brine circuit?
13.1.3 Temperature sensor
- Have you correctly connected and positioned the sensors?
Sensor
Outside sensor T35
Flow sensor T33
13.1.4 Power supply
- Have you correctly connected the power supply?

INSTALLATION
Commissioning
16|WPE-I H 400 Premium www.stiebel-eltron.com
13.2 Manual test of connected components
Note
Certain menu items are protected by a code. The code set
at the factory is 607080.
Note
A hand is displayed when the manual test is activated.
 Call up the "Manual test" menu in the programming unit (see
chapter "Controller menu/ Settings/ Manual test" in the pro-
gramming unit commissioning instructions).
 Activate the manual test.
 Observe the following information.
Note
Deactivate the menu item "Manual test" after carrying
out the different tests.
13.2.1 Mandatory tests
Heating circuit pump
 In the "Manual test" menu, select the heating circuit pump
test.
 Start the pump via the menu.
 Check whether the pump is running.
- Listen.
- Place your hand on the pump.
- Listen for air noises.
 Vent the heating system if necessary (see chapter "Installa-
tion/ Filling the heating system").
 Stop the pump via the menu.
Brine pump
!
Material losses
The pressure in the heat source system must not exceed
6bar.
 In the "Manual test" menu, select the brine pump test.
 Start the pump via the menu.
 Check whether the pump is running.
- Listen for air noises.
- Check the pressure in the brine circuit with an on-site pres-
sure gauge.
 Vent the brine circuit if required (see chapter "Charging the
brine circuit").
 Stop the pump via the menu.
Heating circuit pump
 In the "Manual test" menu, select the heating circuit pump
test.
 Start the pump via the menu.
 Check whether the pump is running.
- Listen for air noises.
 Vent the heating system if necessary (see chapter "Installa-
tion/ Filling the heating system").
 Stop the pump via the menu.
Compressor
 In the "Manual test" menu, select the compressor test.
 Select the compressor stage to be tested.
 Check that no unusual noises can be heard.
 Check if the hot gas line gets hot.
 Check the other compressor stages.
 Stop the compressor via the menu.
13.2.2 Optional tests
The additional tests displayed in the "Manual test" menu are op-
tional.
13.3 Checking for unusual noises
Under adverse circumstances, supply lines and the way they are
routed can cause noise and vibrations, which are increased at
certain compressor and pump speeds.
 Test the operation of the appliance in heating and DHW mode
across the entire speed range of the compressor and pumps.
 Make sure there are no unusual noises near the appliance
and in other parts of the building.
 If required, install anti-vibration mounts and sound-absorb-
ing pipe clamps near the appliance.
 If the unusual noises continue occurring, you can block or
adjust the problematic speeds of the compressor and the
pumps in the controller.
13.4 Connecting to the internet
The connection required to connect to the internet can be found
behind the front panel below the controller unit.
 Remove the front panel (see chapter "Installation/ Removing
the casing parts").
 Connect a router to the terminal.
 Observe the commissioning instructions for the programming
unit and the operating and installation instructions for the
Internet Service Gateway (ISG).
13.5 Locking commissioning mode
After commissioning, leave the programming unit in safe mode.
 Press the open lock on the screen. Confirm the selection. A
closed lock appears on the left of the menu window.
13.6 Heating curve adjustment during
commissioning
The efficiency of a heat pump decreases as the flow temperature
rises. Therefore adjust the heating curve with care. A heating
curve that is set too high leads to the zone or thermostatic valves
closing and the minimum flow rate required for the heating circuit
may not be achieved.
The following steps will help you to adjust the heating curve cor-
rectly:

INSTALLATION
Shutting down the system
www.stiebel-eltron.com WPE-I H 400 Premium | 17
 Fully open thermostatic or zone valves in a lead room (e.g.
living room or bathroom).
We do not recommend installing thermostatic or zone valves
in the lead room.
 At different outside temperatures (e.g. -10 °C and +10 °C),
adjust the heating curve so the required temperature is
achieved in the lead room.
13.7 Appliance handover
Explain the appliance function to users and familiarise them with
how it works.
Note
Hand over these operating and installation instructions to
users for safe-keeping. All information in these instruc-
tions must be closely observed. The instructions provide
information on safety, operation, installation and main-
tenance of the appliance.
14. Shutting down the system
If the system is to be taken out of use, set the programming unit
to standby. This retains the safety functions designed to protect
the system (e.g. frost protection).
There is no need to shut the system down in summer. The pro-
gramming unit has an automatic summer/winter changeover.
!
Material losses
Never interrupt the power supply, even outside the heat-
ing season. The system's active frost protection is not
guaranteed if the power supply is interrupted.
!
Material losses
Observe the temperature application limits and the min-
imum circulation volume on the heat consumer side (see
chapter "Specification/ Data table").
!
Material losses
If the heat pump is completely switched OFF and there is
a risk of frost, drain the system on the water side.
15. Troubleshooting
WARNING Electrocution
 Isolate the appliance from the power supply when
carrying out any work.
Following isolation from the mains supply, parts of the
appliance may remain live. This is because the condens-
ers on the inverter still have to discharge. When the
condensers have discharged, the LEDs on the inverter
stop flashing.
!
Material losses
 Do not perform a hard reset of the appliance by un-
screwing the fuse. This may damage the appliance.
15.1 BM card status display
LEDs are arranged on the BM card (internal heat pump control
unit) which display the current control status.
The two individual LEDs show the communication status.
LED Meaning
RX (receiver) illumi-
nates
The control is processing a mes-
sage or responding to a message
that was sent to the inverter.
TX (transmitter) illumi-
nates
The control is responding to a mes-
sage.
The four LEDs show the control status.
LED Meaning
1 2 3 4
x Standard condition
x ○ ○ ○ Safety stop
The compressor is blocked.
x x x x Update mode
The heat pump profile cannot be configured.
- - - - Frost protection
Not assigned
x Flashing
○ illuminates
15.2 Fault message
If the appliance registers a fault, this is displayed clearly on the
programming unit.
15.2.1 The heat pump is not running
The wrong heat pump is set on the programming unit.
 Check the set model in the "Process data/ Version informa-
tion" menu.
 Have the service engineer set the correct heat pump.
The heat pump is in standby mode.
 Change the system setting to standard operation.
The blocking time for the power supply utility (PSU) is applied.
 Wait for the blocking time to elapse. The heat pump will au-
tomatically start up again.
There is no heat demand.
 Under the menu item "Process data/ Operating data/ Calcu-
lated demand (heating)", check if there is a heating demand.
There may be an incorrect fuse protection rating.
 See chapter "Specification/ Data table".
Note
The heat pump can only be restarted after the fault has
been removed and deleted from the message list.
15.3 Fault table
See the appendix for an overview of possible faults.

INSTALLATION
Maintenance
18|WPE-I H 400 Premium www.stiebel-eltron.com
16. Maintenance
WARNING Electrocution
 Isolate the appliance from the power supply when
carrying out any work.
Following isolation from the mains supply, parts of the
appliance may remain live. This is because the condens-
ers on the inverter still have to discharge. When the
condensers have discharged, the LEDs on the inverter
stop flashing.
!
Material losses
 Do not perform a hard reset of the appliance by un-
screwing the fuse. This may damage the appliance.
We recommend a regular inspection (to establish the current con-
dition of the system), and maintenance if required (to return the
system to its original condition).
 Check the pressure in the brine circuit regularly. Never ex-
ceed the maximum pressure of 6bar.
 Check the pressure in the heating circuit at least twice a year.
Never exceed the maximum pressure of 6bar.
 Check the safety valve for correct function.
 Check the high pressure switch is working correctly.
 Check the DHW lines for leaks between the heat pump and
the draw-off points.
 Check the brine circuit for leaks.
 Check and clean the filters in the heating circuit and brine
circuit twice in the first year since commissioning. The main-
tenance interval can be extended in subsequent years.
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
 Ensure that the heat pump refrigerant circuit is tested once a
year for leaks, in accordance with EC DIRECTIVE 517/2014.
17. Decommissioning
!
Material losses
If the heat pump is completely switched OFF and there is
a risk of frost, drain the system on the water side.
18. Specification
18.1 Approximate current strength values
 Refer to the tables to find the estimated current intensity of
the appliance at a certain radiator flow and heat source tem-
perature.
18.1.1 WPE-I 33 H 400 Premium
Radi-
ator
flow
[°C]
Heat source temperature
[°C]
-10 -5 0 5 10 15 20
65 * * 15.0 25.2 25.2 25.1 25.0
60 *15.6 22.9 23.0 23.1 23.0 22.9
55 14.1 20.8 21.1 21.2 21.2 21.2 21.0
50 19.0 19.3 19.5 19.6 19.6 19.5 19.3
45 17.8 18.0 18.2 18.2 18.2 18.0 17.8
40 16.7 16.9 17.0 17.0 16.9 16.7 16.3
35 15.8 15.9 15.9 15.8 15.6 15.3 14.9
30 14.9 14.9 14.9 14.7 14.3 13.9 13.3
* No details
18.1.2 WPE-I 44 H 400 Premium
Radi-
ator
flow
[°C]
Heat source temperature
[°C]
-10 -5 0 5 10 15 20
65 * * 15.0 29.3 29.4 29.6 29.6
60 *29.1 29.3 29.5 29.8 30.1 30.2
55 26.6 26.8 27.0 27.3 27.6 27.8 27.9
50 24.6 24.9 25.1 25.4 25.6 25.8 25.8
45 22.9 23.2 23.4 23.7 23.8 23.9 23.8
40 21.5 21.7 21.9 22.1 22.2 22.1 21.9
35 20.1 20.3 20.5 20.6 20.6 20.4 20.0
30 18.9 19.0 19.1 19.1 19.0 18.6 18.0
* No details
18.1.3 WPE-I 59 H 400 Premium
Radi-
ator
flow
[°C]
Heat source temperature
[°C]
-10 -5 0 5 10 15 20
65 * * 22.5 39.0 39.3 39.6 39.8
60 *38.9 39.3 39.6 39.9 40.3 40.6
55 35.8 36.1 36.5 36.8 37.1 37.5 37.8
50 33.1 33.5 33.9 34.2 34.6 34.9 35.2
45 30.7 31.1 31.4 31.8 32.1 32.4 32.7
40 28.5 28.9 29.2 29.5 29.9 30.1 30.4
35 26.5 26.8 27.2 27.5 27.7 28.0 28.2
30 24.6 25.0 25.3 25.5 25.8 26.0 26.1
* No details

INSTALLATION
Specication
www.stiebel-eltron.com WPE-I H 400 Premium | 19
18.1.4 WPE-I 87 H 400 Premium
Radi-
ator
flow
[°C]
Heat source temperature
[°C]
-10 -5 0 5 10 15 20
65 * * 50.9 52.4 52.9 53.6 54.4
60 *52.0 52.4 52.8 53.4 54.2 55.2
55 47.4 47.9 48.3 48.8 49.2 49.8 50.6
50 44.0 44.5 44.9 45.3 45.7 46.1 46.7
45 41.1 41.7 42.0 42.3 42.5 42.8 43.1
40 38.6 39.1 39.4 39.6 39.7 39.7 39.8
35 36.3 36.8 37.1 37.1 37.0 36.8 36.6
30 34.1 34.6 34.7 34.6 34.3 33.8 33.3
* No details

INSTALLATION
Specication
20|WPE-I H 400 Premium www.stiebel-eltron.com
18.2 Dimensions and connections
WPE-I 33 H 400 Premium| WPE-I 44 H 400 Premium
1722
1662
692 803
118
256
423
466
576
138 238
202
412
529
565
656
183
423
f02
e01
e02 f01
d16 d15
b02
b03
D0000082779
WPE-I 33 H 400
Premium
WPE-I 44 H 400
Premium
WPE-I 59 H 400
Premium
WPE-I 87 H 400
Premium
b02 Entry electrical cables I
b03 Entry electrical cables II
d15 Hot gas DHW flow optional Diameter mm 28 28 28 28
d16 Hot gas DHW return optional Diameter mm 28 28 28 28
e01 Heating flow Diameter mm 35 35 42 42
e02 Heating return Diameter mm 35 35 42 42
f01 Heat source flow Diameter mm 42 42 54 54
f02 Heat source return Diameter mm 42 42 54 54
WPE-I 59 H 400 Premium| WPE-I 87 H 400 Premium
900
1742
1644
844
128
218
410
522
686
199
253
700
148 166
305
441
609
178
418
f02
e02
d15 e01
f01
d16
b02
b03
D0000082778