STIEBEL ELTRON WPC 04 Instruction Manual

OPERATION AND INSTALLATION
Brine |water heat pump
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CONTENTS
SPECIAL INFORMATION
OPERATION
1. General information _________________________________________4
1.1 Safety instructions����������������������������������������������� 4
1.2 Other symbols in this documentation ����������������������� 4
1.3 Units of measurement ������������������������������������������ 4
2. Safety__________________________________________________________4
2.1 Intended use������������������������������������������������������ 4
2.2 General safety instructions ������������������������������������ 4
2.3 Safety instructions����������������������������������������������� 4
2.4 Test symbols ������������������������������������������������������ 5
3. Appliance description _______________________________________5
3.1 Special features of the WPC...cool���������������������������� 5
4. Operation _____________________________________________________6
4.1 Controls������������������������������������������������������������ 6
4.2 Entering parameters �������������������������������������������� 7
4.3 Selecting operating modes ������������������������������������ 8
4.4 Picture symbols �������������������������������������������������� 8
5. Menu structure _______________________________________________9
5.1 INFO menu �������������������������������������������������������� 9
5.2 DIAGNOSIS menu ����������������������������������������������� 11
5.3 PROGRAMS menu ���������������������������������������������� 12
5.4 SETTINGS menu������������������������������������������������� 14
5.5 FE7 remote control ��������������������������������������������� 21
5.6 FEK remote control ��������������������������������������������� 21
5.7 Internet Service Gateway (ISG)������������������������������� 21
6. Maintenance and care _____________________________________ 22
7. Troubleshooting ____________________________________________ 22
7.1 Other problems ������������������������������������������������� 22
INSTALLATION
8. Safety________________________________________________________ 23
8.1 General safety instructions ����������������������������������� 23
8.2 Instructions, standards and regulations ������������������� 23
9. Appliance description _____________________________________ 23
9.1 Mode of operation���������������������������������������������� 23
9.2 Special features of the WPC...cool��������������������������� 23
9.3 Standard delivery����������������������������������������������� 23
9.4 Accessories������������������������������������������������������� 23
10. Preparations ________________________________________________ 23
10.1 Electrical installation������������������������������������������� 24
11. Installation__________________________________________________ 24
11.1 Transport ��������������������������������������������������������� 24
11.2 Siting �������������������������������������������������������������� 26
11.3 Opening the appliance����������������������������������������� 27
11.4 Installing the heat source system ��������������������������� 27
11.5 Heating water connection������������������������������������� 28
11.6 Oxygen diffusion������������������������������������������������ 28
11.7 Filling the heating system ������������������������������������ 29
11.8 Venting the heating system����������������������������������� 29
11.9 DHW connection ������������������������������������������������ 29
11.10 DHW circulation connection ���������������������������������� 30
11.11 Operation with buffer cylinder������������������������������� 30
11.12 Fitting the push-fit connectors������������������������������� 30
12. Power supply _______________________________________________ 31
12.1 General ����������������������������������������������������������� 31
12.2 Power supply ���������������������������������������������������� 31
12.3 Sensor installation���������������������������������������������� 33
12.4 FE7 remote control ��������������������������������������������� 34
12.5 FEK remote control ��������������������������������������������� 34
12.6 Uponor DEM WP module�������������������������������������� 34
12.7 Internet Service Gateway ISG ��������������������������������34
13. Commissioning _____________________________________________ 35
13.1 Checks before commissioning�������������������������������� 35
13.2 Heating curve adjustment during commissioning ������� 35
13.3 COMMISSIONING menu���������������������������������������� 36
13.4 WPM3i commissioning report�������������������������������� 39
14. Settings _____________________________________________________ 41
14.1 Standard settings ����������������������������������������������� 41
14.2 Heating and DHW programs���������������������������������� 41
14.3 Appliance handover �������������������������������������������� 41
15. Shutting down______________________________________________ 42
16. Troubleshooting ____________________________________________ 42
16.1 Fault display ����������������������������������������������������� 42
16.2 Fault message ��������������������������������������������������� 42
16.3 Resetting the high limit safety cut-out ��������������������� 43
16.4 Resetting the compressor high limit safety cut-out ����� 43
16.5 Fault table�������������������������������������������������������� 44
17. Maintenance ________________________________________________ 46
17.1 DHW cylinders��������������������������������������������������� 46
18. Specification ________________________________________________ 48
18.1 Dimensions and connections ���������������������������������48
18.2 Wiring diagram WPC 04 | WPC 04 cool | WPC 05 | WPC
05 cool ������������������������������������������������������������ 50
18.3 Wiring diagram WPC 07 | WPC 07 cool | WPC 10 | WPC
10 cool | WPC 13 | WPC 13 cool������������������������������� 52
18.4 Output diagrams WPC 04 | WPC 04 cool�������������������� 54
18.5 Output diagrams WPC 05 | WPC 05 cool�������������������� 56
18.6 Output diagrams WPC 07 | WPC 07 cool�������������������� 58
18.7 Output diagrams WPC 10 | WPC 10 cool�������������������� 60
18.8 Output diagrams WPC 13 | WPC 13 cool�������������������� 62
18.9 Data table WPC... ����������������������������������������������� 64
18.10 Data table WPC...cool ������������������������������������������ 66
GUARANTEE
ENVIRONMENT AND RECYCLING

Special information
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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 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 result-
ing risks. Children must never play with the ap-
pliance. Children must never clean the appliance
or perform user maintenance unless they are
supervised.
- Use a permanent connection to the power supply.
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 trou-
ble-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 tempera-
ture may be a maximum of 60°C.
- Cooling mode is only possible in conjunction with
the WPAC 1 cooling module. Set parameter COOL-
ING to ACTIVE COOLING. The COOLING parameter
will only be shown if a FEK or FE 7 remote control
is connected. Cooling mode is only possible in
summer mode.
- The air outlet in the knurled cap of the quick-ac-
tion air vent valve must not point towards the
MFG PCB. Close the quick-action air vent valve
again after venting.
- 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 system's current condition), and maintenance
by a qualified contractor if required (to return the
system to the desired condition).
- Never interrupt the power supply, even outside
the heating period. The system's active frost pro-
tection is not guaranteed if the power supply is
interrupted.
- There is no need to shut the system down in
summer. The heat pump manager has an auto-
matic summer/winter changeover.
DHW cylinders
- Regularly activate the safety valve to prevent
it from becoming blocked e.g. by limescale
deposits.
- Drain the DHW cylinder as described in the chap-
ter "Installation/ Maintenance/ Draining the
DHW cylinder".
- Install a type-tested safety valve in the cold water
supply line. For this bear in mind that, depending
on the static pressure, you may also need a pres-
sure reducing valve.
- The safety valve discharge aperture must remain
open to the atmosphere.
- Install the safety valve discharge pipe with a con-
stant fall to the discharge outlet.
- Size the discharge outlet so that water can drain
off unimpeded when the safety valve is fully
opened.

OPERATION
General information
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OPERATION
1. General information
The chapters "Special Information" and "Operation" are intended
for both the user 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 the instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
!
KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
 Steps to prevent the risk are listed.
1.1.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
1.1.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous or minor injury.
1.2 Other symbols in this documentation
Note
General information is identified by the symbol shown
on the left.
 Read these texts carefully.
Symbol Meaning
Material losses
(appliance and consequential losses, environmental pol-
lution)
Appliance disposal
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.3 Units of measurement
Note
All measurements are given in mm unless stated oth-
erwise.
2. Safety
2.1 Intended use
The appliance is designed for:
- heating rooms
- DHW heating
Observe the operating limits listed in chapter "Specification".
This appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in a non-do-
mestic 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 these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.
2.2 General safety instructions
2.3 Safety instructions
- 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.
- The qualified contractor is responsible for adherence to all
currently applicable instructions 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.
!
!

OPERATION
Appliance description
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!
WARNING Injury
The appliance may be used by children aged 8 and up and
persons with reduced physical, sensory or mental capa-
bilities 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 resulting risks. Children must never play with the
appliance. Children must never clean the appliance or
perform user maintenance unless they are supervised.
Note
Do not change any system-specific settings at the control
unit. Your contractor has set the control unit to match
the local conditions for your building and your individual
requirements. The system-specific parameters are pro-
tected by a code to prevent unintentional modifications.
The parameters that serve to adapt the appliance to your
personal requirements are not protected by a code.
CE designation
The CE designation shows that the appliance meets all essential
requirements according to the:
- Electromagnetic Compatibility Directive
- Low Voltage Directive
2.4 Test symbols
See type plate on the appliance.
3. Appliance description
The appliance is a heating heat pump suitable for operation as a
brine/water 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,
augmented by the electric energy drawn by the compressor. The
heating water is heated to a flow temperature of up to 60 °C,
depending on the heat source temperature.
A heating circuit pump and a multi function assembly (MFG) with
safety assembly and 3-way diverter valve have been integrated
in the appliance for directing the flow either to the heating circuit
or the DHW circuit. 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.
The appliance is equipped with an electric emergency/booster
heater (DHC). If the dual mode point can no longer be maintained
in mono mode operation, the electric emergency/booster heater
is activated to safeguard heating operation and the provision of
high DHW temperatures. In mono energetic operation the electric
emergency/booster heater is then activated as a booster heater.
The appliance is regulated by an integral, weather-compensated
return temperature controller (WPM3i heat pump manager).
The WPM3i also regulates the DHW heating to the required tem-
perature. If either the high pressure sensor or the hot gas limiter
of the heat pump responds during DHW heating, then DHW heating
will automatically be completed by an integral electric emergency/
booster heater, subject to the DHW learning function being disa-
bled. If the DHW learning function is enabled, DHW heating will
cease and the set DHW value is overwritten with the actual DHW
temperature achieved.
The WPM3i also controls the integral electric emergency/booster
heater. No further heat generator can be switched.
3.1 Special features of the WPC...cool
An additional heat exchanger and 3-way diverter valve for chang-
ing over between heating and cooling are integrated into the
WPC...cool.
To cool the living space, the brine is pumped though the additional
heat exchanger, where heat is extracted from the heating water
to be released into the cooler zones underground.
The compressor does not run during cooling.

OPERATION
Operation
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4. Operation
4.1 Controls
26�04�01�0309
1
3
24
WEDNESDAY 12.JUN 13 10:23 TIME
OUTSIDE TEMPERATURE
ACTUAL DHW TEMP
27.0 °C
35.0 °C
28.0 °C
ACTUAL RETURN TEMP
ECO MODE
1 Display
2 MENU key
3 Scroll wheel
4 OK key
You control the system with the programming unit of the heat
pump manager. Use the scroll wheel and the MENU and OK keys
to navigate through the menu structure.
4.1.1 Display
The programming unit display shows the current state of the sys-
tem and provides messages and information.
Start screen
WEDNESDAY 12.JUN 13 10:23 TIME
OUTSIDE TEMPERATURE
ACTUAL DHW TEMP
27.0 °C
35.0 °C
28.0 °C
ACTUAL RETURN TEMP
ECO MODE
26�04�01�0292
1
2
3
4
1 Date and time
2 Temperature display
3 Operating mode
4 System status picture symbols
The start screen is divided into four sections. The top field displays
the date and time. The field below displays the outside tempera-
ture along with the actual DHW temperature and the actual return
temperature. The third section is for selecting and displaying the
operating modes. In the fourth section, picture symbols indicate
the current system state.
Activation
If the scroll wheel and keys/fields are not used for 5minutes,
the programming unit is locked.
WEDNESDAY 12.JUN 13 10:23 TIME
OUTSIDE TEMPERATURE
ACTUAL DHW TEMP
27.0 °C
35.0 °C
28.0 °C
ACTUAL RETURN TEMP
ECO MODE
To activate please
press MENU for 3 s.
.
26�04�01�0292
 Press MENU for 3 seconds to activate the programming unit.
Selection indicator
An indicator shows the current position within the menu structure
at all times. The currently selected menu item is indicated by a
dark background. The current menu level is indicated at the top
of the display.
4.1.2 Scroll wheel
26�04�01�0329
The scroll wheel consists of a touch-sensitive sensor. To the left
and right of it there is one key each. All required appliance func-
tions are controlled and checked with the scroll wheel and the
keys.
Note Sensor responsiveness
Wearing gloves, wet hands or a damp programming unit
impede the recognition of your touch and the execution
of the action you require.
Your contractor can set the sensitivity to touch using the TOUCH
SENSITIVITY parameter under MAIN MENU / COMMISSIONING.

OPERATION
Operation
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Circular movement
Move one finger clockwise over the scroll wheel to move the indi-
cator downwards or to the right in the list, depending on how the
menu options are arranged. An anti-clockwise rotation moves the
selection indicator to the left or upwards in the list.
Alongside navigation within the menu structure, the scroll wheel
is also used to set parameters. Clockwise rotation increases the
values. Anti-clockwise rotation decreases values.
4.1.3 Keys
Note
Press the keys only briefly to initiate the required action.
If a key is touched for too long, the programming unit
does not respond.
MENU key
The MENU key has two functions:
- On the start screen, touch the MENU key to navigate to the
first of the 5 menu structure levels.
- Touching the MENU key while in the menu structure will re-
turn you to the previous menu level.
OK key
The OK key has four functions:
- On the start screen, touching the OK key will activate the
required operating mode previously selected with the scroll
wheel.
- Within the menu structure, touching the OK key confirms the
selected menu option and takes you to the next lower menu
level.
- If you are already at parameter level, touching the OK key
saves the currently set parameter.
- At every menu level, you will see the entry BACK. Selecting
BACK takes you to the next higher menu level.
If there is no user action for more than five minutes, no rotation
and neither MENU nor OK are pressed, the programming unit
display automatically jumps back to the start screen.
Any recent parameter changes which had not yet been confirmed
with OK are lost. The parameters retain the values previously
saved.
4.1.4 Contractor access
Note
Some menu options are protected by a code and can only
be viewed and adjusted by a qualified contractor.
4.2 Entering parameters
Parameters are changed by rotating the scroll wheel. To save the
new value, touch OK.
If you want to cancel the entry, touch MENU. The parameter re-
tains the previously saved value.
Example 1
Adjusting the set room temperature.
+
21.7
-
MAIN MENU
SETTINGS
°C SET ROOM TEMP COMFORT
26�04�01�0347
HEATING HC1
HEATING CIRCUIT 1
SET ROOM TEMP CO
21
To enter set temperatures, a number surrounded by a circle ap-
pears on the display. This indicates that you can change the value
by turning the scroll wheel.
Example 2
Setting the time and date.
15. 09 08:23
DAY MONTH YEAR Hour Minute
Jun
26�04�01�0296
MAIN MENU
SETTINGS
GENERAL
TIME/DATE
SET CLOCK
13
On activation, the selection indicator is over the position MONTH.
Confirm with OK. Set the current month with the scroll wheel and
confirm with OK. A calendar page is displayed. Move the indicated
field to the required day using the scroll wheel and confirm with
OK. The new value is saved when you confirm with OK. Set the
year, hours and minutes the same way.

OPERATION
Operation
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4.3 Selecting operating modes
When activating the start screen, the current operating mode is
displayed. If you want to select another operating mode, turn the
scroll wheel. This takes you through the list of possible operating
modes. The current choice (list entry) is shown in the shaded
selection field.
Note
To change the appliance to this new operating mode,
confirm with OK.
WEDNESDAY 12.JUN 13 10:23 TIME
OUTSIDE TEMPERATURE
ACTUAL DHW TEMP
27.0 °C
35.0 °C
28.0 °C
ACTUAL RETURN TEMP
26�04�01�0292
ECO MODE
Since navigation to a new operating mode is always made from the
currently enabled mode, you may need to move in an anti-clock-
wise direction. All operating modes, apart from DHW mode, apply
to both central heating and DHW.
Standby mode
Frost protection is activated for heating and DHW mode. The set
DHW value is fixed at 10°C, the set heating flow value is calculated
based on a set room value of 5°C.
Application: During prolonged periods of absence, e.g. holidays.
Programmed operation
Heating in line with the time switch program (applies to heating
circuits1 and2). Changeover between Comfort temperature and
ECO temperature.
DHW heating in line with the time switch program; changeover
between Comfort temperature and ECO temperature.
The remote control is only active in this operating mode.
Application: When DHW and central heating are required.
Comfort mode
The heating circuit (HC) is constantly held at the comfort tem-
perature (HC1 and HC2). DHW heating according to time switch
program.
Application: Low energy houses without setback mode.
ECO mode
The heating circuit is constantly held at the ECO temperature (ap-
plicable to HC1 and HC2). DHW heating according to time switch
program.
Application: During weekends away.
DHW mode
DHW heating according to time switch program. If a time program
is active, the water inside the DHW cylinder is heated to the set
comfort temperature. At all other times, the water is heated to
the set ECO temperature. Frost protection is activated for heating
operation.
Application: The heating season has ended; only DHW should be
provided (summer mode).
Emergency mode
In this operating mode, the heat pump is blocked. The BH stages
(electric booster stages) of the emergency/booster heater heat
according to the selected time program for heating and DHW op-
eration.
 Inform your contractor immediately.
4.4 Picture symbols
At the lower edge of the display, symbols provide information
about the current appliance operating status.
Heating circuit pump
The pump symbol is displayed when a heating circuit
pump is running.
Mixer circuit pump
The mixer symbol is displayed when a mixer circuit pump
is running.
Heat-up program
This symbol is displayed when the heat-up program is
running.
Electric emergency/booster heater
The electric emergency/booster heater has started up.
This occurs, for example, when the outside temperature
has fallen below the dual mode point.
Heating
The heating symbol is displayed when the appliance is
in heating mode.
DHW heating
This symbol indicates that the heat pump is heating DHW.
Compressor The symbol is displayed when the compressor is running.
Summer mode
The symbol is displayed when the appliance is in summer
mode.
Cooling The symbol is displayed when the appliance is in cooling
mode.

OPERATION
Menu structure
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5. Menu structure
After activating the programming unit, you can use the scroll
wheel to select other operating modes, or you can use the menu
key to jump to a level from which you can navigate to a specific
appliance parameter.
Level 1 Level 2
INFO SYSTEM
HEAT PUMP
DIAGNOSIS SYSTEM STATUS
HEAT PUMP STATUS
SYSTEM
INTERNAL CALCULATION
FAULT LIST
RELAY TEST SYSTEM
PROGRAMS HEATING PROGRAM
DHW PROGRAM
PARTY PROGRAM
HOLIDAY PROGRAM
HEAT-UP PROGRAM
SETTINGS GENERAL
HEATING
DHW
COOLING
COMMISSIONING ENTER CODE
LANGUAGE
SOURCE
HEATING
DHW
COMPRESSOR
EMERGENCY OPR
HEAT PUMP RESET
FAULT LIST RESET
SYSTEM RESET
5.1 INFO menu
In the INFO menu you can check comparisons of set and actual
values for temperatures, flow rates and pressures of the heating
system and the heat pump.
Note
Please note that actual and set values can only be dis-
played if the appropriate sensors are connected.
5.1.1 INFO SYSTEM
Level 3
ROOM TEMPERATURE
ACTUAL TEMPERATURE FE7
Actual room temperature for heating circuit 1 (HC1) or heating circuit
2 (HC2)
(is only displayed if the FE7 remote control is connected)
°C
SET TEMPERATURE FE7
Set room temperature for heating circuit 1 or heating circuit 2
(is only displayed if the FE7 remote control is connected)
°C
ACTUAL TEMPERATURE FEK
Actual room temperature for heating circuit 1 or heating circuit 2
(is only displayed if the FEK remote control is connected)
°C
Level 3
SET TEMPERATURE FEK
Set room temperature for heating circuit 1 or heating circuit 2
(is only displayed if the FE7 remote control is connected)
°C
REL HUMIDITY %
DEW POINT TEMPERATURE
Dew point temperature (is only displayed if the FEK remote control is
connected)
°C
HEATING
OUTSIDE TEMPERATURE °C
ACTUAL TEMPERATURE HC 1
Actual heating circuit temperature, heating circuit 1
°C
SET TEMPERATURE HC 1
Set heating circuit temperature, heating circuit 1 (HC1). With fixed
value control, the set fixed temperature is displayed.
°C
ACTUAL TEMPERATURE HC 2
Actual heating circuit temperature, heating circuit 2
°C
SET TEMPERATURE HC 2
Set heating circuit temperature, heating circuit 1 (HC1). With fixed
value control, the set fixed temperature is displayed.
°C
ACTUAL FLOW TEMPERATURE HP
Actual heat pump flow temperature
°C
ACTUAL FLOW TEMPERATURE BH
Actual flow temperature of electric emergency/booster heater
°C
ACTUAL RETURN TEMP °C
SET FIXED TEMPERATURE °C
ACTUAL BUFFER TEMPERATURE
Actual buffer cylinder temperature
°C
SET BUFFER TEMPERATURE
Set buffer cylinder temperature
°C
HEATING PRES bar
FLOW RATE l/min
SYST FROST PRO
System frost protection temperature
°C
DHW
ACTUAL TEMPERATURE
ACTUAL DHW TEMPERATURE
°C
SET TEMPERATURE
SET DHW TEMPERATURE
°C
FLOW RATE l/min
COOLING
ACTUAL TEMPERATURE FAN °C
SET TEMPERATURE FAN °C
ACTUAL TEMPERATURE AREA °C
SET TEMPERATURE AREA °C
ELECTRIC REHEATING
DUAL MODE TEMP HEATING
Heating dual mode point
°C
APPLICATION LIMIT HEATING
Heating application limit
°C
DUAL MODE TEMP DHW
DHW dual mode point
°C
APPLICATION LIMIT DHW
DHW application limit
°C
SOURCE
SOURCE TEMPERATURE °C
SOURCE TEMPERATURE MIN °C
SOURCE PRESSURE bar

OPERATION
Menu structure
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5.1.2 INFO HEAT PUMP
Level 3
PROCESS DATA
HOT GAS TEMPERATURE
Compressor outlet temperature
°C
HIGH PRESSURE bar
LOW PRESSURE bar
AMOUNT OF HEAT
COMPRESSOR HEATING DAY
Amount of compressor heat generated in heating mode since 00:00
h of current day, in kWh.
kWh
COMPRESSOR HEATING TOTAL
Total amount of compressor heat generated in heating mode, in
MWh.
MWh
COMPRESSOR DHW DAY
Amount of compressor heat generated in DHW mode since 00:00 h
of current day, in kWh.
kWh
COMPRESSOR DHW TOTAL
Total amount of compressor heat generated in DHW mode, in MWh.
MWh
BH HEATING TOTAL
Total amount of heat generated by the electric emergency/booster
heater in heating mode, in MWh.
MWh
BH DHW TOTAL
Total amount of heat generated by the electric emergency/booster
heater in DHW mode, in MWh.
MWh
POWER CONSUMPTION
COMPRESSOR HEATING DAY
Electrical output of compressor in heating mode since 0:00 h today.
kWh
COMPRESSOR HEATING TOTAL
otal electrical output of compressor in heating mode.
MWh
COMPRESSOR DHW DAY
Electrical output of compressor in DHW mode since 0:00 h today.
kWh
COMPRESSOR DHW TOTAL
Total electrical output of compressor in DHW mode
MWh
RUNTIMES in hours
HEATING COMPRESSOR 1
Runtime of compressor 1 in heating mode.
Hours
DHW COMPRESSOR 1
Runtime of compressor 1 in DHW mode.
Hours
COOLING COMPRESSOR 1
Runtime of compressor 1 in cooling mode.
Hours
BH 1
Runtime of electric emergency/booster heater in booster stage 1.
Hours
BH 2
Runtime of electric emergency/booster heater in booster stage 2.
Hours
BH 1/2
Runtime of electric emergency/booster heater in booster stages 1
and 2.
Hours

OPERATION
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5.2 DIAGNOSIS menu
For heating system and heat pump troubleshooting and analysis,
you can query all important process data and bus subscribers
under DIAGNOSIS and carry out a relay test.
Note
The menu item RELAY TEST SYSTEM is protected by a
code and can only be accessed by a qualified contractor.
Level 2 Level 3 Level 4
SYSTEM STATUS BUFFER CHARGING PUMP
DHW VALVE
HTG CIRC PUMP
MIXER PUMP
MIXER OPEN
MIXER CLOSED
SOURCE PUMP
COOLING MODE
POWER BLOCKED
HEAT PUMP STATUS REM IDLE TIME in minutes
COMPRESSOR
BH 1
BH 2
SYSTEM BUS SUBSCRIBER SUBSCRIBER
SOFTWARE NO.
HEAT PUMP TYPE HEAT PUMP
INTERNAL CALCULATION INTERVAL
LIVE STAGES
FAULT LIST See fault table
RELAY TEST SYSTEM BUFFER CHARGING PUMP
DHW VALVE
HTG CIRC PUMP
MIXER PUMP
MIXER OPEN
MIXER CLOSED
BH 1
BH 2
BH 3
SOURCE PUMP
COOLING MODE
DRAIN HYD MFG
5.2.1 Fault list
The fault list provides an overview of the faults most recently
registered by the appliance. The fault list contains up to 20 fault
messages. The display, however, can show only 2. Turn the scroll
wheel to access the other entries in the fault list.
MAIN MENUDIAGNOSIS
FAULT LIST 1/1
01. SENSOR BREAK E 71
10:26 14.JUN 13
02. MIN SRCE TEMP
17:45 25.JUN 13
5.2.2 Fault message
If the appliance registers a fault, this is clearly displayed with the
message shown below.
COMFORT MODE
!FAULT
SENSOR BREAK E 71
TUESDAY 14.JUN 13 16:27 TIME
If more than one fault occurs, the most recent fault is always
shown. Notify your qualified contractor.
5.2.3 Relay test
All relay outputs of the controller can be individually switched
from here.

OPERATION
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12 | WPC | WPC cool www.stiebel-eltron.com
5.3 PROGRAMS menu
All set times for heating, DHW, holiday and party modes can be
adjusted here, in addition, the heat-up program can be started.
Level 2 Level 3 Level 4
HEATING PROGRAM HEAT CIRCUIT 1
HEAT CIRCUIT 2
DHW PROGRAM
PARTY PROGRAM HOURS
HOLIDAY PROGRAM HOLS BEGINNING
HOLIDAYS ENDING
HEAT-UP PROGRAM ON / OFF LOW END TEMPERA-
TURE
TEMP. RISE PERIOD
MAXIMUM TEMPERA-
TURE
MAX TEMPERATURE
DURATION
RISE PER DAY
5.3.1 HEATING PROGRAM
In the menu item HEATING PROGRAM you can determine when
and how often the appliance heats to the set comfort values for
heating circuit1 and heating circuit2. At all other times, the appli-
ance heats to the set ECO value. You can adjust the set values under
menu item SETTINGS / HEATING / HEAT CIRCUIT1 or HEAT CIR-
CUIT2. Below is an explanation of how to define a time program.
First, select the days on which you want to enable the HEATING
function:
+
-
26�04�01�0301
Monday
Mon
MAIN MENU
PROGRAMS
HEATING PROGRAM
HEAT CIRCUIT 1
You can set your heating system as follows:
- For each individual day of the week (Monday - Sunday)
- Monday to Friday (Mon - Fri)
- Saturday and Sunday (Sat - Sun)
- The whole week (Mon - Sun)
Monday is initially offered.
 Turn the scroll wheel to select another day or group of days.
 Confirm your selection with OK.
You can now set three switching time pairs. The three switching
time pairs are shown on the display, to the right of the clock. A
switching time pair comprises the start time and end point, at
which the appliance returns to its previous state.
07:00 - 20:00
- -:- - - - -:- -
- -:- - - - -:- -
26�04�01�0299
MONDAY
MAIN MENU
PROGRAMS
HEATING PROGRAM
HEAT CIRCUIT 1
In this example, only one switching time pair has so far been
programmed. For switching time pairs 2 and 3, short dashes are
displayed instead of times. These switching time pairs are still
empty. Select one of the free switching time pairs with OK to reach
the level where you can set the associated start and end time.
Pressing OK brings up the display shown below. Set the required
time with the scroll wheel.
End
- -:- - - -:- -
H H
Start
26�04�01�0302
MAIN MENU
PROGRAMS
HEATING PROGRAM
HEAT CIRCUIT 1
Times can be entered in intervals of 15 minutes. You can set 16:30
or 16:45 h, but not 16:37 h. Confirm your entry with OK.
Periods around midnight
Assume, for example, you want heating mode to be enabled from
22:00 h for four hours every Wednesday evening. This means the
period does not expire until the next day, Thursday, at 02:00 h.
Since the day ends at 00:00, two switching time pairs are necessary
for the required program. First, program the period 22:00 to 00:00
h for Wednesday, then 00:00 to 02:00 h for Thursday.
5.3.2 DHW PROGRAM
In the menu item DHW PROGRAM you can determine the times
during which DHW heating with the set comfort value should take
place. At all other times, DHW is heated to the set ECO value. You
can select the set values under menu item SETTINGS/DHW/DHW
TEMPERATURES.
You can set your DHW heating as follows:
- For each individual day of the week (Monday - Sunday)
- Monday to Friday (Mon - Fri)
- Saturday and Sunday (Sat - Sun)
- The whole week (Mon - Sun)
You can set three switching time pairs for each of these options.
Exception: If you want to heat DHW from 22:00 h until 06:00 h the
following day you will need two switching time pairs.
Example:

OPERATION
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You would like to heat DHW twice daily, from 22:00 h until 06:00 h
the following day, and then from 08:00 h until 09:00 h.
As the day begins at 00:00 h, programming for this example must
again start at 00:00 h.
- The first switching time pair runs from 00:00 h until 06:00 h.
- The second switching time pair runs from 08:00 h until 09:00
h.
- The third switching time pair runs from 22:00 h until 24:00 h.
5.3.3 PARTY PROGRAM
In the party program you can extend the comfort mode for heating
by a few hours.
5.3.4 HOLIDAY PROGRAM
In the holiday program, the heat pump system runs in ECO mode
and frost protection for DHW heating is enabled.
For both the start and end of the holiday, enter the year, month
and day. The start time is 0:00 h on the first day of the holiday. The
end time is 24:00 h on the day the holiday ends. After the holiday
period has expired, the heat pump system switches back to the
previous heating and DHW program.
5.3.5 HEAT-UP PROGRAM
Note
The menu item HEAT-UP PROGRAM is protected by a
code and can only be accessed and set by a qualified
contractor.
Heat-up program for underfloor heating systems
Never use the heat pump for drying screed, as this places an
excessive demand on the heat source and may cause it to be
damaged. Use the electric emergency/booster heater for the
heat-up program. For this, set LOWERAPPLIMITHEATING and
DUALMODETEMPHEATING parameters to 30°C and start the
heat-up program.
Emergency mode cannot be enabled in the heat-up program.
There are a total of 6 parameters for the heat-up program. These
6 parameters can be adjusted in sequence as soon as the heat-up
program is activated. The program is started with the HEAT-UP
PROGRAM parameter and with the setting ON. The system then
heats to the selected low end temperature. The low end temper-
ature is held for the set period (parameter TEMPRISEPERIOD).
After expiry of this period, the system heats to the maximum low
end temperature (parameter MAXIMUMTEMPERATURE) using an
increase K/day (parameter RISEPERDAY) and holds this maxi-
mum temperature for the selected time (parameter MAXTEM-
PERATURE DURATION). The system subsequently returns to the
low end temperature using the same steps as for heat-up. This
concludes the heat-up program. As soon as 2 heating circuits
are operational, both will be operated in line with the heat-up
program (operation with buffer cylinder and mixer circuit). Direct
heating circuit1 (buffer circuit with return sensor) adopts the
set values of the heat-up program. Since this is regulated via the
return sensor, the actual temperature inside the buffer cylinder is
higher at the heating flow. The mixer (heating circuit 2) regulates
the temperature back down to the set values selected in the heat-
up program (low end temperature and maximum temperature).
1
7
4 5
3
2
84�03�01�0038
6
Y Temperature
X Time
1 Maximum temperature
2 Low end temperature
3 Low end temperature duration
4 Increase K/day
5 Maximum temperature duration
6 Start
7 End
Please note that only the mixer circuit pump is running when
operating with 2 heating circuits.
If only direct heating circuit 1 is operational, the return sensor is
again used for control. As the actual temperature inside the buffer
cylinder is higher at the heating flow, this configuration results in
5 K being deducted from the set heat-up program values (low end
and maximum temperatures).
The summer logic is disabled whilst the heat-up program runs.

OPERATION
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5.4 SETTINGS menu
Here you can select all system-specific parameters for heating, cooling and DHW modes as well as general settings such as the time.
Note
Some menu options are protected by a code and can only be viewed and adjusted by a qualified contractor.
Level 2 Level 3 Level 4 Level 5
GENERAL TIME / DATE TIME
YEAR
MONTH
DAY
SETTING SUMMER TIME DAY BEGINNING
DAY ENDING
CONTRAST
BRIGHTNESS
TOUCH SENSITIVITY
TOUCH ACCELERATION
HEATING HEAT CIRCUIT 1 SET ROOM TEMP COMFORT
SET ROOM TEMP ECO
HEATING CURVE RISE
HEATING CURVE
HEAT CIRCUIT 2 SET ROOM TEMP COMFORT
SET ROOM TEMP ECO
HEATING CURVE RISE
HEATING CURVE
STANDARD SETTING BUFFER OPERAT
SUMMER MODE OUTSIDE TEMPERATURE
BUILDING HEAT BUFFER
MAXIMUM RETURN TEMP
MAXIMUM FLOW TEMP
MIXER DYNAMICS
MAXIMUM MIXER TEMPERATURE
FIXED VALUE OPERATION
HEATING CIRCUIT OPTIMAL
FROST PROTECT
REMOTE CONTROL FE7 HEATING CIRC PRESELECTION
ROOM INFLUENCE
ROOM CORRECTION
PUMPCYCLES ON / OFF
ELECTRIC REHEATING DUAL MODE TEMP HEATING
LOWER APP LIMIT HEATING
DHW DHW TEMPERATURES SET DHW TEMP COMFORT
SET DHW TEMP ECO
STANDARD SETTING DHW HYSTERESIS
DHW LEARNING FUNCTION
DHW CORRECTION
COMBI CYLINDER
PASTEURISATION ON / OFF
ELECTRIC REHEATING DUAL MODE TEMP DHW
LOWER APP LIMIT DHW

OPERATION
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COOLING COOLING ON / OFF
COOLING MODE PASSIVE COOLING / ACTIVE COOLING
ACTIVE COOLING AREA COOLING SET FLOW TEMPERATURE
FLOW TEMP HYSTERESIS
SET ROOM TEMPERATURE
DYNAMIC
FAN COOLING SET FLOW TEMPERATURE
FLOW TEMP HYSTERESIS
SET ROOM TEMPERATURE
DYNAMIC
PASSIVE COOLING AREA COOLING SET FLOW TEMPERATURE
FLOW TEMP HYSTERESIS
SET ROOM TEMPERATURE
FAN COOLING SET FLOW TEMPERATURE
FLOW TEMP HYSTERESIS
SET ROOM TEMPERATURE
5.4.1 GENERAL
TIME / DATE
Here you can set the time, year, month and day.
SETTING SUMMER TIME
Here you can adjust the settings for summer time.
Summer time is factory set to begin on 25March and to end on
25October.
CONTRAST
Here you can adjust the display contrast.
BRIGHTNESS
Here you can adjust the display brightness.
TOUCHSENSITIVITY and TOUCH ACCELERATION
A code is required for this adjustment.
5.4.2 HEATING
HEAT CIRCUIT 1 and HEAT CIRCUIT 2
SET ROOM TEMP COMFORT and SET ROOM TEMP ECO
Here you can select the set room temperatures for comfort mode
and ECO mode as well as the heating curve rise for heating circuit1
and heating circuit2.
Changing the set room temperature results in a parallel shift of
the heating curve.
As soon as the FE7 remote control has been connected and allo-
cated to heating circuit 1, the actual room temperature can also
be scanned.
As soon as the FE7 or FEK remote control has been connected
and allocated to heating circuit2, the actual room temperature
can also be scanned.
The display HEAT CIRCUIT2 only appears if the mixer flow sensor
for heating circuit2 has been connected.
HEATING CURVE RISE
The menu item HEATING CURVE RISE enables you to set one heat-
ing curve each for heating circuits1 and 2.
Note: Your contractor will have set a building and system-specific
optimum heating curve for every heating circuit. For heating cir-
cuit 1 the curve relates to the heat pump return temperature, for
heating circuit 2 to the mixer flow temperature.
When you adjust the heating curve on the heat pump manager, the
calculated set return or flow temperature, subject to the outside
temperature and the set room temperature, will be shown at the
top of the display.
As soon as you have preselected a temperature in menu SETTINGS
/ HEATING / STANDARD SETTING under parameter FIXED VALUE
OPERATION, heating curve 1 is hidden from view and the display
showsSETFIXED TEMPERATURE with the relevant temperature.

OPERATION
Menu structure
16 | WPC | WPC cool www.stiebel-eltron.com
HEATING CURVE
Adjustment of programmed changeover between Comfort and
ECO mode
The figure shows the diagram with the set heating curve relating
to a set room temperature for comfort mode. The second, dashed
line relates to a set room temperature for ECO mode.
60
40
20
0
1
2
20 15 10 5 0 -5 -10 -15 -20
26�03�01�1915
Y Return / flow temperature [°C]
X Outside temperature [°C]
1 Comfort mode
2 ECO mode
Adapting a heating curve
Example:
With heating systems, the temperature in a building during the
transitional periods (spring and autumn) is too low when outside
temperatures are between 5 °C and 15°C, despite open radiator
valves, but is OK at outside temperatures ≤ 0°C. This problem can
be remedied with a parallel shift and a simultaneous reduction
of the heating curve.
Heating curve 1.0 was initially adjusted relative to a set room tem-
perature of 20 °C. The dotted line indicates the modified heating
curve at 0.83 and a modified set room temperature of 23.2°C.
60
40
20
0
20 15 10 5 0 -5 -10 -15 -20
26�03�01�1916+
Y Return / flow temperature [°C]
X Outside temperature [°C]
STANDARD SETTING
BUFFER OPERAT
When using a buffer cylinder, set this parameter to ON.
SUMMER MODE
Parameter SUMMER MODE enables you to define the point at
which the heating system is to switch to summer mode. Summer
mode can be switched on or off. There are 2 adjustable parameters
for this function.
-Parameter OUTSIDE TEMPERATURE:
Outside temperature adjustable from 10 °C to 30 °C
-Parameter BUILDING HEAT BUFFER
This parameter lets you choose whether an average outside tem-
perature should be determined, according to the type of building.
You can choose from 3 settings.
Setting "1": Minor insulation towards outside temperatures (aver-
aging over a 24 h period), e.g.for timber construction with rapid
heat transfer.
Setting "2": Moderate insulation towards outside temperatures
(averaging over a 48 h period), e.g. brick construction with thermal
insulation and average heat transfer.
Setting "3": Strong insulation towards outside temperatures (aver-
aging over a 72 h period). House with slow heat transfer.
If the determined outside temperature is ≥ than the selected out-
side temperature, both heating circuits (if installed) enter summer
mode; reverse hysteresis –1 K.
With fixed-value control, summer mode is disabled for heating
circuit 1.
MAXIMUM RETURN TEMP
Setting range 20 °C to 55 °C.
If the temperature at the return sensor reaches this set value dur-
ing heating operation, the heat pump is immediately switched
off. This safety function prevents the high pressure switch from
responding. No fault message is issued when this value is reached.
During DHW operation the return temperature is not scanned.
MAXIMUM FLOW TEMP
Maximum heat pump flow temperature for central heating
Setting range 20 °C to 65°C.
This setting limits the flow temperature of the heat pump and the
electric emergency/booster heater in heating mode.
MIXER DYNAMICS
Mixer runtime
Setting range 60 to 240
You can use this setting to adapt the mixer characteristics. The
setting 60 to 240 means 6 K to 24 K control deviation.

OPERATION
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The scan rate is 10 s and the minimum on time for the mixer is
0.5 s. The mixer does not respond in the dead zone of ±1 K from
the set value.
Example for the setting 100 = 10 K
The control deviation (set mixer temperature – actual mixer tem-
perature) is 5K. The mixer opens for 5 s, then pauses for 5 s and
starts again.
The control deviation (set mixer temperature – actual mixer tem-
perature) is 7.5 K. The mixer opens for 7.5 s, then pauses for 2.5
s and starts again.
The smaller the control deviation, the shorter the mixer on time
and the longer the pauses.
A reduction of the MIXER DYNAMIC value with the control devi-
ation unchanged increases the on duration and reduces pauses.
Example for setting 100 and a current control deviation of 5 K.
5 K of 10 K = 50% = on duration
Example: Control deviation
± 1 K
4
3
26�03�01�1067
1
2
1 Setting 100 = control deviation 10 K
2 Control deviation 5 K
3 Control deviation in K
4 On time in %
MAXIMUM MIXER TEMPERATURE
Setting range 20 °C to 90°C.
This setting limits the flow temperature of the mixer circuit. For
example, if a higher set flow temperature is calculated from the
mixer circuit data, the max. set mixer flow temperature will be
used to control and regulate to this value.
FIXED VALUE OPERATION
The heat pump return is regulated to the set fixed value. The
switching time program will then be ignored. The various posi-
tions of the program selector will then only affect the mixer circuit
(if installed). When the program selector is set to standby and a
fixed temperature has been selected the frost protection is acti-
vated and the compressor is switched off. Summer logic remains
disabled with fixed temperature control. This means that the heat-
ing circuit pump is not switched off for the direct heating circuit.
HEATING CIRCUIT OPTIMAL
When an Uponor DEM-WP module is connected, the heating curve
is dynamically optimised for the heat demand of individual rooms.
This involves modifying the preset heating curve by up to 50%
of its original value.
The parameter HEATINGCIRCUITOPTIMAL is only displayed when
the buffer operation parameter is set to "OFF" and neither a mixer
sensor nor an FE7 remote control are connected.
The parameter HEATINGCIRCUITOPTIMAL can be set to "ON" or
"OFF". The default value is "OFF".
This parameter may only be set to "ON" when an Uponor DEM WP
module is connected.
This function is only active in comfort mode, ECO mode and pro-
grammed operation.
FROST PROTECT
To protect the heating system from frost, start the heating circuit
pumps at the selected frost protection temperature; the reverse
hysteresis is 1K.

OPERATION
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REMOTE CONTROL FE7
This menu item is only displayed when the FE7 remote control is
connected.
HEATING CIRC PRESELECTION
The FE7 remote control can be selected for both heating circuits.
This parameter lets you choose which heating circuit the remote
control is to act on. Depending on the remote control preselection,
the actual room temperature can be checked under INFO / SYSTEM
/ROOM TEMPERATURE.
ROOM INFLUENCE
Standard setting 5 adjustable from ---- via 0 to 20 Dashes (----)
in the display:
With the FE7 remote control connected, the room temperature
sensor only serves to record and display the actual room temper-
ature; it has no influence on the actual control. The remote control
can be used to adjust the room temperature for heating circuit 1
or 2 by ± 5 °C in automatic mode only. This set value adjustment
applies to the current heating time, not to the setback time.
At the same time, the setting "0 to 20" serves to control the room
temperature-dependent night setback. This means that the heat-
ing circuit pump is switched off at the point of changeover from the
heating into the setback phase. It remains off until the actual room
temperature falls below the set room temperature. After this, the
system continues to regulate in weather-compensated mode.
If you want the room temperature to be taken into account, set
the room temperature sensor influence to a value > 0. The room
sensor influence has the same effect as the outside temperature
sensor has on the return temperature, except that the effect is 1
to 20 times greater, depending on the factor set.
-Room temperature-dependent return / flow temperature
with weather compensation
With this type of control, a control cascade is formed from both
weather-compensated and room temperature dependent return/
flow temperature control. This means that the weather-compen-
sated return/flow temperature control sets a default return/flow
temperature that is corrected by the overriding room temperature
control in accordance with the following formula:
∆ϕR= (ϕRSOLL − ϕRIST) * S * K
Because a substantial proportion of the control is already han-
dled by the weather-compensated control, the room temperature
sensor compensation factor K can be set lower than with pure
room temperature control (K=20). The figure indicates the control
method with the set factor K=10 (room influence) and a heating
curve S=1.2.
-Room temperature control with weather-compensation
This type of control offers two main benefits:
Incorrectly set heating curves are corrected by the room sensor
influence K; whilst the smaller factor Kmeans the control unit
works in a more stable manner.
However, observe the following for all control units with room
temperature sensor influence:
- The room temperature sensor must capture the room tem-
perature accurately.
- Open doors and windows greatly affect the control result.
- All radiator valves in the lead room must be fully open at all
times.
- The temperature inside the lead room affects the entire heat-
ing circuit.
If you want the room temperature to be taken into account, set the
room temperature sensor influence to a value > 0.
20
30
40
20
50
60
70
80
90
1917 18 21 22 23 24 25
0
10
0
20 -20
15 10 5-5 -10 -15
Y
X 1
Y
X 2
1
1
1
2
3
4
5
26�03�01�1917
Y Flow temperature [°C]
X 1 Room temperature [°C]
X 2 Outside temperature [°C]
1 Room temperature sensor influence at K = 10 and S = 1.2
and control deviation +/- 2K
2 Heating curve S = 1.2
3 Weather-compensated set flow temperature at ϕA= - 10
°C
4 Weather-compensated set flow temperature at ϕA= 0 °C
5 Weather-compensated set flow temperature at ϕA= + 10
°C
ROOM CORRECTION
You can use this parameter to calibrate the measured room tem-
perature.
PUMPCYCLES
-Heating circuit pump control
The PUMP CYCLES parameter only applies to the direct heating
circuit1, i.e. for heating circuit pump 1.
This parameter can be switched ON or OFF. In the OFF position,
the heating circuit pump will not cycle. It will operate constantly.
It is only switched off in summer mode.
As soon as you set the parameter to ON, the heating circuit pump
will be switched in line with a fixed temperature curve for the
outside temperature.
The heating circuit pump start pulse is always 5minutes.
The heating circuit pump for heating circuit 1 always starts with
each heat pump start. The pump runs on for 5 minutes after the
heat pump has been shut down. This is where the start-up dura-
tion is brought to bear, e.g.at an outside temperature of 5°C, the
pump starts 3 times per hour for 5minutes respectively.

OPERATION
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0 10 20 30 40 50 60
< -10
-10
-5
0
5
10
Y
2
1
84�03�01�0039
Y Outside temperature in °C
X Time in minutes
1 Pause
2 Pump run time
-Pump kick
To prevent the pumps seizing up, for example over summer, the
pumps are switched on for 10 seconds after every 24 hour period
of inactivity. This applies to all pumps.
-Heating circuit pump control with FE7 / FEK remote control
connected
In conjunction with the FE7 or FEK remote control, the switching
condition
ϕACTUAL room >ϕSET room + 1K
causes the respective heating circuit pump to be switched off,
while the mixer moves to CLOSE. This only applies if the room
sensor influence is set to K > 0. Reverse switching is subject to
the following condition:
ϕACTUAL room >ϕSET room
The summer mode is also effective for the respective heating cir-
cuit when operating with a FE7 or FEK remote control.
ELECTRIC REHEATING
DUAL MODE TEMP HEATING
Dual mode temperature of the heat pump for heating operation
Below this outside temperature, the electric emergency/booster
heater is switched on for heating operation, subject to load.
LOWER APP LIMIT HEATING
Heat pump application limit
The heat pump is switched off if the outside temperature drops
below the selected lower application limit for heating.
The electric emergency/booster heater alone provides central
heating.
5.4.3 DHW
DHW TEMPERATURES
SET DHW TEMP COMFORT and SET DHW TEMP ECO
Here you can select the set DHW temperatures for Comfort and
ECO mode.
STANDARD SETTING
DHW HYSTERESIS
This is where you determine the switching hysteresis for DHW
heating.
- Starting DHW heating at the set DHW temperature minus the
hysteresis value.
DHW LEARNING FUNCTION
Setting OFF
When heating DHW, the system automatically adjusts itself to the
required DHW temperature (self-learning function).
The electric emergency/booster heater will be added as a booster
stage as soon as the heat pump is shut down in DHW mode via
the HP sensor or via the hot gas temperature limit (130 °C). If the
flow temperature of 70°C is achieved in this operating mode,
DHW heating will be terminated, and the set DHW temperature is
overwritten with the actual DHW temperature.
Setting ON
As soon as the heat pump is shut down in DHW mode via the HP
sensor or the hot gas temperature limit (130 °C), DHW heating is
terminated and the set DHW temperature will be overwritten with
the current actual DHW temperature. This operating mode saves
energy, as DHW is exclusively heated by heat pump.
DHW CORRECTION
The DHW temperature is measured in the bottom third of the
cylinder. The DHW outlet temperature is approx.3K higher than
the measured temperature. This deviation is corrected and can be
calibrated if necessary.
COMBI CYLINDER
As soon as you set the parameter to ON, the heating circuit pumps
are switched off during DHW heating.
(Only in conjunction with the SBS instantaneous water cylinder)
PASTEURISATION
The DHW cylinder is heated daily at 01:00 h to 60 °C if pasteurisa-
tion has been enabled. Pasteurisation only takes place when the
electric emergency/booster heater is connected.

OPERATION
Menu structure
20 | WPC | WPC cool www.stiebel-eltron.com
ELECTRIC REHEATING
DUAL MODE TEMP DHW
Dual mode temperature of the heat pump for DHW heating.
Below this outside temperature, the electric emergency/booster
heater is switched on for DHW heating, subject to load.
LOWER APP LIMIT DHW
Lower application limit of the heat pump for DHW heating.
The heat pump is switched off at outside temperatures below the
selected lower DHW application limit.
The electric emergency/booster heater alone provides DHW heat-
ing.
5.4.4 COOLING
The appliance is designed for DHW and central heating. Passive
cooling is possible in conjunction with the WPC cool. In the de-
livered condition, the COOLING parameter is set to OFF. Active
cooling mode is only possible in conjunction with the WPAC 2
cooling module.
COOLING
On / OFF
COOLING MODE
PASSIVE COOLING / ACTIVE COOLING
ACTIVE COOLING
AREA COOLING
-FLOW TEMPERATURE
-FLOW TEMP HYSTERESIS
-SET ROOM TEMPERATURE
-DYNAMIC
FAN COOLING
-FLOW TEMPERATURE
-FLOW TEMP HYSTERESIS
-SET ROOM TEMPERATURE
-DYNAMIC
PASSIVE COOLING
AREA COOLING
-FLOW TEMPERATURE
-FLOW TEMP HYSTERESIS
-SET ROOM TEMPERATURE
FAN COOLING
-FLOW TEMPERATURE
-FLOW TEMP HYSTERESIS
-SET ROOM TEMPERATURE
!
Appliance and system damage
You must not enable the COOLING parameter without a
cooling module.
WPC 04 - 16 with WPAC 2 cooling module
!
Appliance and system damage
Set the COOLING parameter to ACTIVE COOLING.
Note
The COOLING parameter will only be shown if an FEK or
FE7 remote control is connected. Cooling mode is only
possible in summer mode.
The WPC with the WPAC 2 cools in 2 stages:
Stage 1 (source pump)
Heat is extracted from the heating circuit and is passed to the
heat source system.
Stage 2 (source pump + compressor)
In addition, the refrigerant circuit extracts heat from the heating
circuit and transfers it to the heat source system.
DHW heating
DHW heating always has priority. As long as the actual tempera-
ture has not dropped below the set flow or room temperature, ac-
tive cooling continues even during DHW heating, and any extracted
heat is transferred to the DHW. If there is no cooling demand, DHW
is conventionally heated via the heat source system.
Cooling mode with the FE7
The FE7 remote control is not equipped with dew point monitor-
ing. It can therefore only be used in conjunction with fan convec-
tors with condensate drain. The cooling mode parameter must
be set to FAN.
Cooling mode with the FEK
The FEK remote control is equipped with dew point monitoring,
and can therefore be used with area heating systems (e.g. under-
floor/wall heating systems, etc.). The COOLING parameter must be
set to AREA COOLING. The set flow temperature is compared with
the captured dew point temperature, so the actual temperature
never drops below the dew point. When using fan convectors
with the FEK remote control, set the COOLING parameter to FAN
COOLING.
In the COOLINGparameter, you can select the following cooling
modes for the FE7 and the FEK:
- Room temperature
Cooling mode starts when the selected room temperature is
exceeded (output COOLING=230 V).
Cooling mode is stopped when the actual room temperature
drops 2K below the set temperature. (output COOLING=0 V)