STIEBEL ELTRON WPF 10 M Quick start guide

OPERATION AND INSTALLATION
BRINE | WATER HEAT PUMP
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CONTENTS
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������4
1.1 Further applicable 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 ���������������������������������������5
6. Troubleshooting ����������������������������������������������5
6.1 Other problems �������������������������������������������������� 5
INSTALLATION
7. Safety����������������������������������������������������������6
7.1 General safety instructions ������������������������������������ 6
7.2 Regulations, standards and instructions�������������������� 6
8. Appliance description ���������������������������������������6
8.1 Mode of operation����������������������������������������������� 6
8.2 Standard delivery������������������������������������������������ 6
9. Preparations ��������������������������������������������������6
9.1 General information��������������������������������������������� 6
9.2 Electrical installation�������������������������������������������� 7
9.3 Buffer cylinder ��������������������������������������������������� 7
10. Preparing for installation �����������������������������������7
10.1 Transport ���������������������������������������������������������� 7
10.2 Positioning �������������������������������������������������������� 7
10.3 Removing the casing panels����������������������������������� 8
10.4 Installing the heat source system ���������������������������� 8
10.5 Heating water connection�������������������������������������� 9
10.6 Safety temperature controller for underfloor heating
system ������������������������������������������������������������ 10
10.7 Power supply ���������������������������������������������������� 10
10.8 Fitting casing components������������������������������������ 13
11. Commissioning ��������������������������������������������� 13
11.1 Checks prior to commissioning the heat pump
manager ���������������������������������������������������������� 14
11.2 Commissioning the heat pump manager ������������������ 14
11.3 Heating curve adjustment ������������������������������������ 14
11.4 Appliance handover �������������������������������������������� 14
11.5 Operation and control ����������������������������������������� 14
12. Shutting down���������������������������������������������� 14
13. Maintenance and cleaning �������������������������������� 15
14. Troubleshooting �������������������������������������������� 15
14.1 IWS controls ����������������������������������������������������� 15
15. Specification ������������������������������������������������ 16
15.1 Connections and dimensions��������������������������������� 16
15.2 Wiring diagram WPF 10 M | WPF 13 M | WPF 16 M ������ 18
15.3 Wiring diagram WPF 7 MS | WPF 10 MS ������������������� 20
15.4 Output diagrams WPF 7 MS ���������������������������������� 22
15.5 Output diagrams WPF 10 M | WPF 10 MS ������������������ 24
15.6 Output diagrams WPF 13 M����������������������������������� 26
15.7 Output diagrams WPF 16 M����������������������������������� 28
15.8 Data table �������������������������������������������������������� 30
WARRANTY
ENVIRONMENT AND RECYCLING

SPECIAL INFORMATION
ENGLISH
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SPECIAL INFORMATION
- The appliance may be used by children aged 8
and up and persons with reduced physical, sen-
sory or mental capabilities or a lack of experi-
ence provided that they are supervised or they
have been instructed on how to use the appliance
safely and have understood the resulting risks.
Children must never play with the appliance. Chil-
dren must never clean the appliance or perform
user maintenance unless they are supervised.
- Only use a permanent connection to the power
supply. The appliance must be able to be sepa-
rated from the power supply by an isolator that
disconnects all poles with at least 3mm contact
separation.
- Maintain the minimum clearances to ensure trou-
ble-free operation of the appliance and facilitate
maintenance work.
- Maintenance work, such as checking the electri-
cal safety, must only be carried out by a qualified
contractor.
- We recommend an annual inspection (to establish
the current condition of the system), and service
by a contractor if required (to return the system
into its original condition).
- The heat pump power supply must not be inter-
rupted, even outside the heating season. Other-
wise the system is at risk from frost.
- The heat pump manager automatically switches
the heat pump to summer or winter mode.
- If the heat pump and frost protection are com-
pletely switched off, drain the system on the
water side.

OPERATION
GENERAL INFORMATION
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OPERATION
1. General information
The chapter “Operation” is intended for appliance users and heat-
ing contractors.
The chapter “Installation” is intended for heating contractors.
Note
Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Further applicable documents
Operating and installation instructions of the WPM heat
pump manager
Operating and installation instructions of all other com-
ponents in the system
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-
serious or minor injury.
1.3 Other symbols in this documentation
Note
Notes are bordered by horizontal lines above and below
the text. General information is identified by the symbol
shown on the left.
 Read these texts carefully.
Symbol
Damage to the appliance and environment
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
Explanations to determine and interpret the specified standardised
output data.
1.5.1 Standard: EN 14511
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.
Further 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
ENGLISH
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2. Safety
2.1 Intended use
The appliance is designed for central heating within the applica-
tion limits given in the specification.
This appliance is designed for domestic use. It can be safely oper-
ated by untrained personnel. The appliance can also be used in a
non-domestic environment, e.g. in a small business, as long as it
is used in the same way.
Any other use beyond that described shall be deemed inappropri-
ate. Observation of this document is also part of the correct use
of the unit. Any changes or conversions to the appliance void any
warranty. The appliance is designed to heat buildings.
2.2 Safety instructions
Observe the following safety instructions and regulations.
- The electrical installation and installation of the heating cir-
cuit must only be carried out by a recognised, qualified con-
tractor or by our customer service engineers.
- Contractors are responsible for adherence to all currently ap-
plicable regulations during installation and commissioning.
- Operate the appliance only when fully installed and with all
safety equipment fitted.
- Protect the appliance from dust and dirt ingress during
building work.
!
WARNING Injury
The appliance may be used by children aged 8 and up
and persons with reduced physical, sensory or mental
capabilities or a lack of experience provided that they
are supervised or they have been instructed on how to
use the appliance safely and have understood the result-
ing risks. Children must never play with the appliance.
Children must never clean the appliance or perform user
maintenance unless they are supervised.
2.3 Test symbols
See type plate on the appliance.
3. Appliance description
The WPF...M is a heating heat pump designed to operate as a
ground source heat pump. The heat pump extracts energy from
the heat source medium, i.e. brine, at a low temperature level.
This extracted energy is then transferred to the heating water at a
higher level, enriched with the energy drawn by the compressor.
Subject to the heat source temperature, the heating water can be
heated up to a flow temperature of 60 °C.
Modular operation is feasible with the WPF..M.
4. Operation
The heat pump is exclusively controlled by the heat pump manager
WPM. Therefore, observe the instructions in chapter Operation,
in the operating and installation instructions of the heat pump
manager WPM.
5. Maintenance and care
!
Appliance and system damage
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 steel
parts. Never use abrasive or corrosive cleaning agents.
Protect the appliance from dust and dirt ingress during building
work.
6. Troubleshooting
Fault Cause Remedy
There is no hot water or
the heating system stays
cold.
The fuse/MCB has blown/
responded.
Check the fuse/MCB in
your fuse box/distribu-
tion panel.
6.1 Other problems
If you cannot remedy the fault, notify your heating contractor. To
facilitate and speed up your enquiry, please provide the serial
number from the type plate. The type plate is located on the front
at the top on the right or left hand side of the casing.
Sample type plate
Montageanweisung beachten! Dichtheit geprüft! Made in Germany
*xxxxxxxxxxxxxxxxxx*
1
26�03�01�1570
1 Number on the type plate

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INSTALLATION
SAFETY
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free operation and operational reliability
only if the original accessories and spare parts intended for the
appliance are used.
7.2 Regulations, standards and instructions
Note
Observe all applicable national and regional regulations
and instructions.
8. Appliance description
8.1 Mode of operation
Environmental energy is extracted by the heat exchanger on the
heat source side (evaporator). Any energy extracted is transferred,
together with the energy drawn by the compressor drive, to the
heating water by a heat exchanger on the heating water side
(condenser). Subject to the heat load, the heating water can be
heated to +60°C. The DHW is heated via the internal indirect coil
inside the DHW cylinder.
8.2 Standard delivery
No other components are supplied with the appliance.
9. Preparations
9.1 General information
Note
The heat pump is designed for installation in interiors,
except in wet areas.
Never install the heat pump immediately below or adjacent to bed-
rooms. Insulate pipes through walls and ceilings against structure-
borne noise transmission.
The room in which the appliance is to be installed must meet the
following conditions:
- No risk from frost.
- Floor of load-bearing strength (for the equipment weight,
see specification).
- Horizontal, level and solid floor, as the equipment feet on the
heat pump are non-adjustable.
- For a quiet heat pump operation on floating screeds, recess
the screed and the anti-vibration insulation around the in-
stallation location of the heat pump.
1 432
26�03�01�0213
1 Concrete base
2 Impact sound insulation
3 Floating screed
4 Recess
- The room must not be subject to a risk of explosions arising
from dust, gases or vapours.
- The floor area of the installation room must be at least 3 m²,
and the room must provide a volume of at least 6 m³.
- When installing the heat pump in a boiler room together
with other heating equipment ensure, that the operation of
other heating equipment will not be impaired.

ENGLISH
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INSTALLATION
PREPARING FOR INSTALLATION
9.2 Electrical installation
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
Only use a permanent connection to the power supply.
The appliance must be able to be isolated from the power
supply by an isolator that disconnects all poles with at
least 3mm contact separation. This requirement can be
met by contactors, circuit breakers, fuses etc.
!
Appliance damage
The specified voltage must match the mains voltage. Ob-
serve the type plate.
Use the following cable cross-sections subject to their fuse pro-
tection:
Fuse protec-
tion
Cable cross-section
C 16 A 2.5 mm²
1.5 mm² with only two live wires and routing on a wall or
in an electrical conduit on a wall.
C 25 A 6.0 mm² when routing in a wall.
4.0 mm² when routing a multi core line on a wall or in an
electrical conduit on a wall.
Provide separate fuses/MCB for the two power circuits of the ap-
pliance and the control unit.
The electrical specifications are given in the “Data table”. You
require aJ-Y(St)2x2x0.8mm² cable for the BUS.
Note
Provide separate fuses for the two power circuits of the
appliance and the control unit.
9.3 Buffer cylinder
A buffer cylinder is recommended to ensure a trouble-free ap-
pliance operation.
The buffer cylinder not only provides hydraulic separation of the
flow in the heat pump and heating circuit.
10. Preparing for installation
10.1 Transport
 Transport the appliance in its packaging to protect it against
damage.
 Protect the appliance against heavy impact during handling.
- Only allow the appliance to be tilted during transport for a
short time to one of its longitudinal sides.
The longer the appliance is tilted, the greater the distribution
of refrigerant oil in the system.
- Storage and transport at temperatures below -20°C and in
excess of +50°C are not permissible.
10.2 Positioning
 Remove the packaging film and the top and side EPS
padding.
 Tilt the appliance backwards slightly and remove it from the
pallet.
 Position the appliance on the prepared substrate.
 Observe the minimum clearances (see chapter “Connections
and dimensions”).
≥500
≥50
≥500
≥500
≥1000
D0000019327
 Remove the six screws from the appliance plinth, and set
down the casing onto the floor.
6x
26�03�01�1573
!
Appliance damage
The casing must stand on the floor free of the refrigeration
unit. That means, the six plinth screws must not be refitted.

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INSTALLATION
PREPARING FOR INSTALLATION
10.3 Removing the casing panels
When removing the front cover ensure that the cables that con-
nect the heat pump manager to the control panel are not torn off.
The same applies to the earth connection which connects the front
cover to the casing electrically.
2x
4x
26�03�01�1574
10.4 Installing the heat source system
Design the heat source system for the ground source heat pump
in accordance with the technical guides.
Approved brine:
- Heat transfer medium as concentrate on an ethylene glycol
base, part no: 231109
- Heat transfer medium as concentrate on an ethylene glycol
base, part no: 16 16 96
10.4.1 Circulation pump and required flow rate
Use a circulation pump with compound-filled windings to supply
the brine, to prevent an earth short circuit through condensate in
the electrical part of the pump (cold water version).
Size the circulation pump in accordance with the system-specific
conditions, i.e. nominal flow rate and pressure drop must be taken
into consideration (see “Specification”).
An adequate flow rate must be safeguarded at every possible
brine temperature, i.e.:
Nominal flow rate at a brine temperature of 0°C with a tolerance
of +10 %.
10.4.2 Connection and filling with brine
Prior to connecting the heat pump, check the heat source circuit
for possible leaks, and flush thoroughly.
Calculate the volume of the heat source circuit. You can determine
the brine volume inside the heat pump under specific operating
conditions from the following table (see “Specification”).
The overall volume equals that of the required amount of brine
that should be mixed from undiluted ethylene glycol and water.
The chloride content of the water must not exceed 300 ppm.
Mixing ratio
The brine concentration varies when using a geothermal collector
or a geothermal probe as a heat source.
The mixing ratio can be found in the table below.
Ethylene glycol Water
Geothermal probe 25 % 75 %
Geothermal collector 33 % 67 %
Filling the brine circuit
Fill the brine circuit via the drain.
1
26�03�01�1606
1 Drain, brine side
After filling the system with brine and prior to commissioning,
open the drain until brine runs out of it. No water must remain in
the pipe run to the drain.

ENGLISH
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INSTALLATION
PREPARING FOR INSTALLATION
Check the brine concentration:
 Determine the density of the ethylene glycol/water mixture,
e.g. with a hydrometer.
Using the actual density and temperature, you can check the actual
concentration in the diagram.
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]
Note
The quoted details refer to ethylene glycol (see "Speci-
fication").
Thermally insulate all brine pipes with diffusion-proof material.
To prevent the transmission of noise, connect the heat source
circuit to the heat pump with flexible pressure hoses.
10.4.3 Checking the heat source flow rate
The heat source flow rate is set via the temperature differential of
the heat source circuit.
 Calculate the temperature differential. For this, operate the
appliance in heating mode or DHW mode.
Max. temperature differential of heat source circuit
6
1
2
5
4
3
2
1
-5 0 5 10 15 20
84�03�01�0017
Y Max. temperature differential [K]
X Source inlet temperature [°C]
1 Heating flow 35 °C
2 Heating flow 50 °C
Note
At the WPM II, the source parameter in the commissioning
report must be set to “ethylene glycol” otherwise the frost
stat will stop the heat pump at temperatures below 7 °C.
Note
You can check the source outlet temperature on the heat
pump manager display under system menu item TEM-
PERATURES.
10.5 Heating water connection
The heat pump heating system must be installed by a qualified
contractor in accordance with the water installation drawings that
are part of the technical documents.
 Thoroughly flush the pipework before connecting the heat
pump. Foreign bodies, such as welding pearls, rust, sand,
sealant etc. can impair the operational reliability of the heat
pump.
 Connect the heat pump on the hot water side. Check for
tightness.
Ensure the correct connection of the heating flow and return.
Provide thermal insulation in accordance with applicable regula-
tions.
For sizing the heating circuit, note the maximum available external
pressure differential.
10.5.1 Oxygen diffusion
!
Appliance damage
In underfloor heating systems, avoid open heating sys-
tems or the installation of steel pipes in conjunction with
plastic pipes that are permeable to oxygen.
Steel components such as internal cylinders, steel heating ele-
ments or steel pipes, can corrode as a result of oxygen diffusion in
open vented heating systems, of if plastic pipes that are permeable
to oxygen are used in underfloor heating systems.

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INSTALLATION
PREPARING FOR INSTALLATION
The products of corrosion, e.g. rusty sludge, can settle inside the
heat pump condenser and result in a lower output by reducing
the cross-section, or in a shutdown being activated by the high
pressure switch.
10.5.2 Second external heat generator
For dual mode heating systems, always connect the heat pump
into the return of the second heat generator (e.g. oil boiler).
High heating water temperature: In dual mode heating systems,
the return water from the second heat generator can flow through
the heat pump, immediately after it has been switched off, with
a max. temperature of 60 °C. The temperature may be 70 °C no
sooner than ten minutes after the heat pump has been shut down.
10.5.3 Filling the heating system
Fill the heating system via the drain valve.
26�03�01�1606
1
1 Drain, heating side
Water quality
A fill water analysis must be available prior to charging the sys-
tem. 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. The fill water
limits specified in chapter "Specification / Data table"
must always be observed.
 Recheck these limits 8-12 weeks after commission-
ing and as part of annual system maintenance.
Note
With conductivity of >1000μS/cm, desalination treatment
is recommended in order to avoid corrosion.
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 as for desalination apply.
10.5.4 Venting the heating system
 Vent the pipework thoroughly.
10.6 Safety temperature controller for underfloor
heating system
!
Material losses
In case of failure, in order to prevent an excessively high
flow temperature in the underfloor heating system, we
generally recommend the use of a safety temperature
controller to limit the system temperature.
10.7 Power supply
Note
Observe the heat pump manager operating and instal-
lation instructions
Only qualified electricians must carry out the installation in ac-
cordance with these instructions.
Permission to connect the appliance may need to be obtained from
your local power supply utility.
 Observe chapter “Preparing the electrical installation”.
DANGER Electrocution
Before any work, isolate the appliance from the power
supply at the control panel.
Note
The terminals are located in the appliance control panel.
Note
If the appliance is sealed, observe chapter “Removing
the casing parts”.
Use appropriate cables in accordance with local regulations for
all connections.
 Open the control panel’s cover flap. To do so, remove the fix-
ing screws on the side at the top of the control panel.
 Route all connecting cables and sensor leads through the en-
tries provided at the top of the back panel (see chapter “Con-
nections and dimensions”).
 Route all cables and leads through the strain relief fittings.
 Connect cables according to the following diagrams.
 Then check the function of the strain relief fittings.
Note
When closing the appliance, observe chapter “Fitting the
casing parts”.

ENGLISH
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INSTALLATION
PREPARING FOR INSTALLATION
10.7.1 Electrical connection WPF (three-phase)
Terminals X3: Appliance and brine pump
26�03�01�1595
Heat pump power supply (compressor)
L1, L2, L3, N, PE (3/N/PE~400 V 50 Hz)
!
Please note:
The compressor must only rotate in one direction. Change
the direction of rotation by interchanging two phases, if
the fault NO POWER appears in the WPM display when
the compressor starts.
Brine pump power supply
L1, L2, L3, N, PE (3/N/PE~400 V 50 Hz)
After connecting all electrical cables, refit and seal the cover over
the mains terminal strip.
Terminals X4: Control
26�03�01�1596
Mains supply: L, N, PE (1/N/PE ~230 V 50 Hz )
Terminals X2: Low voltage
26�03�01�1597
H BUS high
L BUS Low
BUS ground
“ + “ BUS “ + “
Sensor No function
Circulation pumps
Connect the circulation pumps in accordance with the specifica-
tions in the technical guides.
!
Appliance damage
If external high efficiency circulation pumps are used,
never switch these directly.
Use an external relay with a breaking capacity of at least
10 A/250 V AC.

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INSTALLATION
PREPARING FOR INSTALLATION
10.7.2 Electrical connection WPF MS (single phase)
Terminals X3: Heat pump
D0000040629
Heat pump power supply (compressor)
L, N, PE
Power supply, heat pump with WPAB
R, RC, N, PE
After connecting all electrical cables, refit and seal the cover over
the mains terminal strip.
Terminals X4: Control
D0000040630
Mains supply: L, N, PE
Outputs:
S Control output for the WPAB
ON Compressor signal
Terminals X2: Low voltage
D0000040631
1 BUS High H
2 BUS Low L
3 BUS ground
4 and 5 Temperature sensors

ENGLISH
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INSTALLATION
COMMISSIONING
10.7.3 Electrical connection WPF MS (single phase) with WPAB
To limit the starting current of the WPF MS, the WPAB can be
installed in the domestic distribution board. The WPAB limits the
starting current to the values listed in the specification.
!
Please note:
When a WPAB is connected to the heat pump, remove the
jumper across R and RC at terminal X3.
!
Please note:
When connecting a WPAB, use the same phase for L (ter-
minal X3) of the compressor and L (terminal X4) of the
controller; protect the unit with an RCD.
Wire in accordance with the following diagram.
X3
M
1~ M1
S PC
R
RC
L1
S
ON
N
L R RCNX4 NONS
1
2 4
3
5
6
26�03�01�0256
3
1
2
1 WPAB
2 Heat pump
3 Power supply 1/N/PE 230V
10.7.4 Modules
When using a modular approach, connect the individual heat
pumps via terminal BUS 1, 2, 3. Ensure that High, Low and Ground
are correctly connected at the WPM as well as at the heat pump.
10.8 Fitting casing components
When fitting the casing parts, proceed as follows:
 Close the cover of the control panel.
 Secure the cover by firmly tightening the fixing screws with
serrated washers.
 Fit the cover to the appliance.
 After attaching the front cover, fix it to the side panels with
screws, as shown in the diagram. When attaching the front
cover, fit the tab with its screws and serrated washers. The
tab, screws and serrated washers can be found in the pack.
 When attaching the front cover, ensure the earth conductor is
correctly connected.
2x
4x
2x
26�03�01�1575
11. Commissioning
A contractor must commission the appliance, make all the set-
tings when commissioning the heat pump manager and instruct
the user.
Carry out commissioning in accordance with these installation
instructions, the operating and installation instructions for the
heat pump manager and the operating and installation instruc-
tions for the heat pump.
Our customer service can assist in the commissioning, which is
chargeable.
Where this appliance is intended for commercial use, the rules of
the relevant Health & Safety at Work Act may be applicable for
commissioning. For further details, check with your local authoris-
ing body (in Germany, for example, this is the TÜV).
After commissioning, complete the commissioning report that is
part of these instructions.

14 | WPF M WWW.STIEBEL-ELTRON.COM
INSTALLATION
SHUTTING DOWN
11.1 Checks prior to commissioning the heat pump
manager
!
Damage to the appliance and environment
Observe the maximum system temperature in underfloor
heating systems.
!
Damage to the appliance and environment
With an underfloor heating system, never use the heat
pump to dry the screed as this places such a high demand
on the heat source that the frost protection function may
respond.
 Check whether the heating system is charged to the correct
pressure and the quick-action air vent valve is open.
 Check whether the outside temperature sensor is correctly
placed and connected.
 Check whether the power supply is connected correctly.
 Check whether the connecting cable to the heat pump (BUS
cable) is connected correctly.
11.2 Commissioning the heat pump manager
Commission the heat pump manager and make all settings in ac-
cordance with the operating and installation instructions for the
heat pump manager.
11.3 Heating curve adjustment
The efficiency of a heat pump decreases as the flow temperature
rises. The heating curve should therefore be adjusted with care.
Heating curves that are set too high cause the zone valves and
thermostatic valves to close, which may lead to the minimum flow
rate required for the heating circuit not being achieved.
 Observe the WPM operating and installation instructions.
The following steps will help you to adjust the heating curve cor-
rectly:
- Fully open thermostatic or zone valves in a lead room (e.g.
living room and bathroom).
We do not recommend installing thermostatic or zone valves
in the lead room. Control the temperature for these rooms
via remote control.
- At different outside temperatures (e.g. –10°C and +10°C),
adjust the heating curve so the required temperature is set in
the lead room.
Standard values to begin with:
Parameter Underfloor heating system Radiator heating system
Heating curve 0.4 0.8
Control response time 515
Comfort temperature 20°C 20°C
If the room temperature in spring and autumn is too low (approx.
10 °C outside temperature), the value of parameter COMFORT TEM-
PERATURE must be raised in the heat pump manager menu under
SETTINGS / HEATING / HEATING CIRCUIT.
Note
If no remote control is installed, raising the parameter
“COMFORT TEMPERATURE” leads to a parallel offset of
the heating curve.
Increase the parameter “heating curve” if the room temperature
is not high enough when outside temperatures are low.
If the parameter “heating curve” has been raised, adjust the zone
valve or thermostatic valve in the lead room to the required tem-
perature at high outside temperatures.
!
Material losses
Never reduce the temperature in the entire building by
closing all zone or thermostatic valves, instead use the
setback programs.
When everything has been implemented correctly, the system
can be heated to its maximum operating temperature and vented
once again.
!
Material losses
With underfloor heating systems, observe the maximum
permissible temperature for the system.
11.4 Appliance handover
Explain the appliance function to users and familiarise them with
its operation.
Note
Hand over these operating and installation instructions
to the user for safe-keeping. Carefully observe all infor-
mation in these instructions. They provide information
on safety, operation, installation and maintenance of the
appliance.
11.5 Operation and control
!
Appliance and system damage
Never interrupt the power supply, not even outside the
heating season. The system’s active frost protection is not
guaranteed if the power supply is interrupted.
The system should not be switched off in summer. The heat pump
manager has an automatic summer / winter changeover.
12. Shutting down
If the system is taken out of use, set the heat pump manager to
standby. This way the safety functions that protect the system
remain enabled, e.g. frost protection.
!
Appliance and system damage
If the heat pump and frost protection are completely
switched off, drain the system on the water side.

ENGLISH
WWW.STIEBEL-ELTRON.COM WPF M | 15
INSTALLATION
MAINTENANCE AND CLEANING
13. Maintenance and cleaning
If heat meters are installed, clean their strainers frequently as
they block easily.
When the heat pump operation is impaired (high pressure lim-
iter trips) through deposits of corrosion by-products (rust sludge)
inside the condenser, only dissolving them by means of solvents
used by our service department will remove this problem.
14. Troubleshooting
Note
Please observe the heat pump manager operating and
installation instructions.
Note
The following inspection instructions may only be carried
out by a qualified contractor.
If you cannot locate the fault using the heat pump manager, use
the controls on the IWS.
 Open the control panel.
 Read the following sections on troubleshooting and carry out
the instructions.
14.1 IWS controls
The IWS (integral heat pump controller) helps you to troubleshoot
if the fault cannot be identified using the WPM.
3
4
1
2
BA
BA
26�03�01�1426
1 LEDs
2 Reset button
3 DIP switch (type WP)
4 DIP switch (BA)
14.1.1 Checking the “HP type” DIP switch on the IWS
 Check whether the “HP type”DIP switch (3) [marked WP-Typ]
is set as follows:
WP - Typ
ON
1 2 3 4
D0000057058
If the appliance is to be used as a module together with a further
WPF..M, the DIP switch must remain in the same position.
14.1.2 DIP switch “BA”
These DIP switches have no function.
14.1.3 LEDs
Red LED
Fault Cause “ Remedy
Appliance stops and
restarts after the idle
period has expired. Red
LED flashes.
Heat pump fault Check the fault message
in the WPM. Find the solu-
tion in the WPM instruc-
tions (fault list). Perform
an IWS reset (see WPM
instructions).
Appliance stops perma-
nently. Red LED illumi-
nates.
Five faults within two
hours compressor
runtime.
Check the fault message
in the WPM. Find the solu-
tion in the WPM instruc-
tions (fault list). Perform
an IWS reset (see WPM
instructions).
Green LED centre
The LED flashes during initialisation, and illuminates constantly
after the BUS address has been assigned successfully. Only then
is communication with the WPM established.
14.1.4 Reset button
If the IWS was incorrectly initialised, the settings can be reset with
this button. For this also observe the chapter “Reinitialising IWS”
in the heat pump manager operating and installation instructions.

16 | WPF M WWW.STIEBEL-ELTRON.COM
INSTALLATION
SPECIFICATION
15. Specification
15.1 Connections and dimensions
510
926
960
85
170
340
425
100
176
680
382
f02
e01
f01
e02
c11
b02 b03
D0000016831
WPF 10 M WPF 13 M WPF 16 M WPF 7 MS WPF 10 MS
b02 Entry electrical cablesI
b03 Entry electrical cablesII
c11 Safety assembly
e01 Heating flow Male thread G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4
e02 Heating return Male thread G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4
f01 Heat source flow Male thread G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4
f02 Heat source return Male thread G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4 G 1 1/4

ENGLISH
WWW.STIEBEL-ELTRON.COM WPF M | 17
INSTALLATION
SPECIFICATION

18 | WPF M WWW.STIEBEL-ELTRON.COM
INSTALLATION
SPECIFICATION
15.2 Wiring diagram WPF 10 M | WPF 13 M | WPF 16 M
9
87
6
6
X2
K2
A2
A1
A2
A1
K1
6
6
K1 K2
1
5
4 3 2
L
11
2
-1
K2
Bus
12 10
9 8 7
-2
-2
-1
K1
H
3
1
N
5 4 3 2
3
4 5
L
A2
13
K2
14
14
K1
13
X1
1
2
X4
F2
> p
2
321
4
5
X23
X29
X35
X30
1
2
i
p
P1
P3
i
p
B5
T
12-18 V
1
2
1
A2
A1
K4
1
2
4
6
M1
M
3
K2
531
X3
K1
6
4
2
1 3 5
L1
L2 L3
X23
C
T1
S
T2
R
T3
N
R2 R3
R1
K4
6
4
2
1 3 5
X23
Z3
br
swws
br
swws
L1
L2 L3
N
3/N/PE AC 50Hz 400V
WP (Netz)
3/N/PE AC 50Hz 400V
Anschluss Solepumpe
1
2 3
54
6
7 8
3
2
1
Ext.Steuer.
4
5
6
Störung
L
N
PE
1
2
3
7 4
ON
1/N/PE AC 50Hz 230V
K4
LH
BUS
26�03�01�0238

ENGLISH
WWW.STIEBEL-ELTRON.COM WPF M | 19
INSTALLATION
SPECIFICATION
A2 Integral heat pump control unit IWS
B5 Hot gas temperature sensor
F2 High pressure switch
K1 Contactor – resistor jumper
K2 Contactor, compressor start
K4 Contactor, brine pump
M1 Compressor motor
P1 High pressure sensor
P3 Low pressure sensor
R1 Start-up resistance
R2 Start-up resistance
R3 Start-up resistance
X1 Terminals
X2 LV terminals
X3 Power terminals
X4 Control terminals
X23 Power supply earth block
X29 Plug-in connector IWS 12-PIN
X30 Plug-in connector IWS 3-PIN
X35 Plug-in connector IWS 6-PIN
Z3 EMI capacitors

20 | WPF M WWW.STIEBEL-ELTRON.COM
INSTALLATION
SPECIFICATION
15.3 Wiring diagram WPF 7 MS | WPF 10 MS
85�03�12�0006