STIEBEL ELTRON MEG 30 Operation and Installation

OPERATION AND INSTALLATION

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2 | WPF basic www.stiebel-eltron.com

CONTENTS

SPECIAL INFORMATION

OPERATION

1. General information ��3

1.1 Safety instructions �� 3

1.2 Other symbols in this documentation �� 4

1.3 Units of measurement �� 4

1.4 Standardised output data �� 4

2. Safety �� 4

2.1 Intended use �� 4

2.2 Safety information �� 4

2.3 Test symbols �� 4

3. Appliance description ��4

3.1 Energy saving tip �� 5

4. Operation ��5

4.1 Operation �� 6

4.2 Essential facts in brief �� 6

4.3 Adjustments at control level 1 �� 7

4.4 Overview of control level 2�� 7

4.5 Adjustments at control level 2 �� 8

4.6 Remote control FE7 �� 17

4.7 Remote control FEK �� 17

5. Maintenance and care �� 17

6. Troubleshooting �� 17

6.1 Other problems �� 17

INSTALLATION

7. Safety �� 18

7.1 General safety information �� 18

7.2 Instructions, standards and regulations �� 18

8. Appliance description �� 18

8.1 Mode of operation �� 18

8.2 Standard delivery �� 18

9. Preparations �� 18

9.1 General information �� 18

9.2 Electrical installation�� 19

9.3 Buffer cylinder �� 19

10. Mounting �� 19

10.1 Handling �� 19

10.2 Positioning �� 19

10.3 Removing the casing panels �� 20

10.4 Installing the heat source system �� 20

10.5 Heating water connection �� 22

10.6 Oxygen diffusion �� 22

10.7 Filling the heating system �� 22

10.8 Venting the heating system �� 22

10.9 Minimum ﬂow rate of heat sink for WPF 5-16 basic �� 23

10.10 Flow rate of heat sink for WPF 5-10 S basic �� 24

10.11 DHW heating �� 24

10.12 Electrical connection �� 24

10.13 Fitting the casing parts �� 28

10.14 installation �� 29

10.15 High limit safety cut-out for underﬂoor heating

systems STB-FB �� 29

10.16 Remote control FE7 �� 30

10.17 Remote control FEK �� 30

11. Commissioning �� 30

11.1 Checks before commissioning�� 30

11.2 Heating curve adjustment during commissioning �� 31

11.3 Operation and control �� 31

11.4 Taking the appliance out of use �� 31

11.5 Heat pump manager commissioning summary �� 32

11.6 Heat pump manager commissioning �� 34

11.7 WPMiw commissioning report �� 41

12. Settings �� 42

12.1 Standard settings �� 42

12.2 Heating and DHW programs �� 42

12.3 Appliance handover �� 42

13. Troubleshooting �� 43

13.1 Fault display �� 43

13.2 Resetting the high limit safety cut-out �� 44

13.3 Fault list parameter �� 45

14. Maintenance �� 45

15. Speciﬁcation �� 46

15.1 Connections ��46

15.2 Installation dimensions �� 47

15.3 Wiring diagram WPF 5 basic ��48

15.4 Wiring diagram WPF 7 basic | WPF 10 basic | WPF 13

basic | WPF 16 basic ��50

15.5 Wiring diagram WPF 5-10 S basic �� 52

15.6 Output diagrams WPF 5 basic �� 54

15.7 Output diagrams WPF 7 basic �� 56

15.8 Output diagrams WPF 10 basic ��58

15.9 Output diagrams WPF 13 basic �� 60

15.10 Output diagrams WPF 16 basic �� 62

15.11 Output diagrams WPF 5 S basic �� 64

15.12 Output diagrams WPF 7 S basic �� 65

15.13 Output diagrams WPF 10 S basic �� 66

15.14 Data table WPF 5-16 basic �� 67

15.15 Datentabelle WPF 5-10 S basic �� 69

15.16 Data table WPMiw �� 70

GUARANTEE

ENVIRONMENT AND RECYCLING

SPECIAL INFORMATION

General information

www.stiebel-eltron.com WPF basic | 3

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.

- The COOLING MODE parameter must only be set if

there is a suitable hydraulic circuit.

- The COOLING MODE parameter will only be

shown if a FEK or FE7 remote control is connect-

ed. The cooling mode is only possible in summer.

- Maintenance work, such as checking the electri-

cal safety, must only be carried out by a qualiﬁed

contractor.

- We recommend a regular inspection (to establish

the current condition of the system), and main-

tenance by a qualiﬁed contractor if required (to

return the system to its original 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.

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 these instructions on 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

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.

OPERATION

Safety

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1.2 Other symbols in this documentation

Note

General information is identiﬁed by the adjacent symbol.

 Read these texts carefully.

Symbol Meaning

Material losses

(appliance damage, consequential losses and environmen-

tal pollution)

Appliance disposal

 This symbol indicates that you have to do something. The ac-

tion you need to take is described step by step.

1.3 Units of measurement

Note

All measurements are given in mm unless stated oth-

erwise.

1.4 Standardised output data

Explanations to determine and interpret the speciﬁed standardised

output data

1.4.1 Standard: EN 14511

The output data speciﬁcally mentioned in text, diagrams and

technical datasheets has been determined in line with the test

conditions described in the standard shown in the heading of

this chapter.

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

the selected method deviates from the conditions described in the

standard shown in the heading of this chapter, any deviations can

have a considerable impact. Further factors that have an inﬂuence

on the test values are the measuring equipment, the system con-

ﬁguration, the age of the system and the ﬂow rates.

A conﬁrmation of the speciﬁed output data can only be obtained

if the conditions applicable to the relevant test match those of the

standard shown in the heading of this chapter.

2. Safety

2.1 Intended use

The appliance is designed to:

- heat rooms.

- heat DHW.

Observe the operating limits listed in chapter “Speciﬁcation”.

The appliance is intended for domestic use, i.e. h. it can be used

safely by untrained persons. 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 these instructions and of instructions for any

accessories used is also part of the correct use of this appliance.

Any changes or conversions to the appliance void any warranty.

2.2 Safety information

Observe the following safety information 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.

!

WARNING Injury

 For safety reasons, only operate the appliance with

the casing closed.

2.3 Test symbols

See type plate on the appliance.

3. Appliance description

The WPF is a heating heat pump designed as a ground source

heat pump. The heat pump extracts energy from the heat source

medium at a low temperature level. This extracted energy is then

transferred to the heating water at a higher level, enriched by

the electric 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.

Inside the WPF, a heating circuit pump and a three-way valve have

been integrated for diverting the ﬂow either to the heating circuit

OPERATION

Operation

www.stiebel-eltron.com WPF basic | 5

or the DHW circuit. DHW is heated by pumping the heating water,

which has been heated by the heat pump, 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 is undershot in mono mode

operation, the electric emergency/booster heater is activated to

safeguard heating operation and the provision of high DHW tem-

peratures. If the same thing happens in mono energetic operation,

the electric emergency/booster heater is activated as a booster

heater.

The equipment is regulated by an integral, weather-compensated

return temperature control (WPMiw heat pump manager).

The WPMiw also regulates the DHW heating to the required tem-

perature. DHW heating will be completed automatically by an

integral electric booster heater, if either the high pressure sensor

or the hot gas limiter of the heat pump responds during DHW

heating, subject to the ECO function being enabled. Subject to the

ECO function being enabled, the DHW heating will terminate and

the set DHW value overwritten with the actual DHW temperature

that has been achieved.

The WPMiw also controls the integral electric booster heater. No

other heat source can be switched.

3.1 Energy saving tip

- Heat pumps operate with particular economy and environ-

mental responsibility when they work with a maximum ﬂow

temperature of 35 °C. Low ﬂow temperatures can be achieved

by using area heating systems (e.g. underﬂoor heating or

wall heating systems).

- Size radiators so that the maximum required ﬂow tempera-

ture does not exceed 45 °C.

- Activating the control parameter “Pump cycling” can reduce

the power drawn by the circulation pump. In this connection,

refer to your local heating contractor.

- When activating the “DHW ECO” parameter, the heat pump

heats DHW exclusively on its own, i.e. without the additional

electric booster heater. In that case, the DHW temperature is

automatically limited to that value, which the heat pump can

actually achieve. If, for reasons of pasteurisation, you want to

heat the cylinder to 60 °C at least once every day, activate the

“PASTEURISATION” parameter. In this connection, refer to

your local heating contractor.

Summary of WPMiw functions

- RS 232 interface for adjustment and monitoring via a PC

- System expansion through the FEK and FE7 remote control

units

- Input of the system and heat pump frost protection limits

- At least 24 h power reserve for the clock

- Automatic pump kick-start

- Reset option

- Stored fault list with precise fault code indication, together

with date and time display

- Fast and precise fault diagnosis with a system analyser incl.

temperature scanning of heat pumps and peripherals without

additional equipment

- Factory settings for time switch programs for all heating and

DHW circuits

4. Operation

WPMiw heat pump manager

PRGPC Reset Auto

Raumtemp. 2

Raumtemp. 1

Warmwassertemp.

Zeit / Datum

Ferien / Partyprog.

Info Temperaturen

Heizkurven

Heizprogramme

Warmwasserprog.

Inbetriebnahme

1456

3

2

ROOM TEMP HCI

26�03�01�0073

Room temp. 1

DHW temp.

Time / Date

Holiday / Party prog.

Info temperatures

Heating curves

Heating prog

DHW program

Start up

Room temp. 2

1 Rotary selector

2 Rotary selector Reset / Auto

3 Appliance menu

4 Programming key

5 Programming indicator

6 Optical interface RS 232

System status display

26�03�01�1572

9

8

7

6

5

4

3

2

1

10

ROOM TEMP HCI

1 Compressor 1

2 Buffer cylinder primary pump

3 Cooling (only with a suitable hydraulic circuit)

4 Electric emergency/booster heater (DHW heating)

5 Electric emergency/booster heater (heating)

6 DHW heating

7 Circulation pump, heating circuit 1 “radiator circuit”

8 Circulation pump, heating circuit 2 “mixer circuit”

9 Mixer close

10 Mixer open

OPERATION

Operation

6 | WPF basic www.stiebel-eltron.com

4.1 Operation

The operation is split over three control levels. Control levels 1

and 2 are accessible to users and contractors alike. Control level

3 is reserved for qualiﬁed contractors:

1. control level (control ﬂap closed)

This enables the adjustment of operating modes, such as standby

mode, programmed operation, constant day or setback mode, etc.

2. control level (control ﬂap open)

This enables system parameters, such as room temperatures, DHW

temperatures, heating programs, etc. to be adjusted.

3. control level (for contractors only)

This level is protected by a code and should only be used by a

contractor. Here, you can determine the speciﬁc details regarding

the heat pump and heating system.

4.2 Essential facts in brief

Settings

All settings follow the same pattern:

Opening the control ﬂap toggles the manager into programming

mode. An indicator symbol

is shown at the bottom of the dis-

play at system parameter Room temp. 1. Turning the rotary selec-

tor allows you to move the indicator to the system parameter

you want to change.

To change the system parameter, press

. Whenever the red in-

dicator above illuminates, you can modify the current value by

turning the rotary selector . Press the key again; the indicator

then extinguishes and the new set value has been saved. You can

modify further values for this parameter by pressing again, if

the red indicator has not been extinguished above . The pro-

gramming step can only be terminated when the red indicator

has extinguished.

Terminating the programming process

You can terminate the programming process after entering and sav-

ing the required parameter changes by closing the control ﬂap. If you

want to make further changes, turn the rotary selector

until the

display shows BACK, then press

. This will return you to the previ-

ous level. Closing the control ﬂap with illuminated indicator above

returns the manager into its original position. The modiﬁed

value will then not be saved.

Note

During commissioning, a system check will be imple-

mented, e.g. all sensors that are currently connected are

displayed upon request. Sensors not connected before

the system went ‚live‘ are not registered by the manager

and are therefore not displayed. The indicator symbol

skips such system parameters.

Example: The system parameters DHW TEMP and DHW PROGRAM

will be skipped if, during commissioning, the DHW cylinder sensor

was not connected. und Warmwasserprog. übersprungen. Values

for these parameters, therefore, cannot be programmed.

Display including all display elements

24

12

18

6

V

C

2 765431

13 12 11 10 9 8

26�03�01�0075

1 Heating times for central heating and DHW (black)

2 14-digit plain text display

3 Day mode for heating circuit 1

4 Compressor running

5 Switching time pairs for central heating and DHW operation

6 2. heat source running

7 Setback mode for heating circuit 1

8 DHW mode

9 Constant setback mode

10 Constant day mode

11 Automatic mode

12 Standby mode

13 Fault message (ﬂashing)

OPERATION

Operation

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4.3 Adjustments at control level 1

4.3.1 Operating modes

The operating modes are changed by turning rotary selector with

the control ﬂap closed.

Standby mode

Frost protection is activated for heating and DHW mode. The dis-

play indicates frost protection when the ﬂap is closed. The set

DHW value is ﬁxed at 10 °C, the set heating ﬂow value is calculated

based on a set room temperature of 5 °C.

Application: during holidays.

Automatic mode

Heating subject to time switch program (applies to heating circuits

1 and 2); changeover between day and setback temperatures. DHW

in accordance with a time switch program; changeover between

day and setback temperature, see point 4. In this operating mode,

an additional sun or moon symbol is displayed to indicate whether

heating circuit 1 is currently in day or setback mode. The remote

control is only active in this mode.

Application: When DHW and central heating are required.

Constant day mode

The heating circuit is constantly held at the day temperature (ap-

plicable to heating circuit 1 and heating circuit 2). DHW in accord-

ance with a time switch program.

Application: Low energy houses without setback mode.

Constant setback mode

The heating circuit is constantly held at the setback temperature

(applicable to heating circuit 1 and heating circuit 2). DHW in

accordance with a time switch program.

Application: during weekends away.

DHW mode

DHW heating is regulated by a time switch program. If a time

program is enabled, the water inside the DHW cylinder is heated

to the set day temperature. At all other times, the water is heat-

ed to the set night temperature. Frost protection is activated for

heating operation.

Application: The heating season has ended; only DHW should be

generated.

Fault message (ﬂashing)

Indicates faults in the heat pump system.

Notify your local contractor

4.4 Overview of control level 2

To access control level 2,

 open the control ﬂap.

 Select the required parameter with the rotary selector.

The display shows the relevant parameter in plain text and an

arrow indicating the parameter’s location in the control level.

ROOM TEMP HC1

Here you can select the set room temperature for day and setback

mode for heating circuit 1.

ROOM TEMP HC2

Here you can select the set room temperature for day and setback

mode for heating circuit 2. The display ROOM TEMP2 will only be

displayed, if the mixer ﬂow sensor for heating circuit 2 has been

connected.

Note

The actual room temperature can also be scanned if the

FE7 or FEK remote control has been connected and allo-

cated to HC1 or HC2.

DHW TEMP

Here you can allocate a set day and night temperature to the

temperature inside the DHW cylinder.

TIME/DATE

Here you can adjust the time and summertime.

At the factory, summertime is set to begin on 25 March and to

end on 25 October.

HOLIDAY/PARTY

You can indicate the length of your holiday using the holiday pro-

gram menu (start date, end date). The heat pump system oper-

ates in setback mode for the selected period. Frost protection is

activated for the DHW cylinder.

The party program menu item allows you to extend the day mode

by a few hours.

Temperatures

Here you can scan the heat pump or heat pump system sensor

temperatures, comparing set with actual values, the heating curve

gap, etc.

HEATING CURVES

Here you can select a heating curve each for heating circuit 1

and heating circuit 2. The room temperature will only remain

constant, irrespective of the outside temperature, if the correct

heating curve has been selected for the relevant type of building.

Selecting the correct heating curve is therefore vitally important.

HEATING PROG

Here you can adjust associated heating programs for heating cir-

cuits 1 and 2.

OPERATION

Operation

8 | WPF basic www.stiebel-eltron.com

DHW PROGRAM

Here you select the times when the appliance will control DHW

heating using the set day value. At all other times, the appliance

controls DHW heating using the set night value.

COMMISSIONING

Note

The commissioning level (control level 3) may only be

altered by your contractor.

Here you need to determine the settings of control level 2 and the

system-speciﬁc parameters. These parameters are adjusted at

control level 3, access to which is protected by code.

Check all parameters in sequence, and enter all selected values

into the column (system value) provided in the commissioning

report.

4.4.1 Special features of the WPF in cooling mode

For the WPF in cooling mode, your qualiﬁed contractor selects

the room temperature for cooling mode at control level 3. Cooling

commences when the room temperature exceeds the set room

temperature.

Cooling terminates when the actual room temperature is 2 K lower

than the set room temperature.

Note

For cooling via cooling surfaces (underﬂoor heating or

wall heating systems), you also require the FEK remote

control. For cooling via fan-assisted convectors, you also

require the FEK or FE7 remote control.

Cooling via radiators would lead to moisture damage and

is therefore not permissible!

4.5 Adjustments at control level 2

To make any adjustments at control level 2, open the control ﬂap.

4.5.1 Room temperature HC 1

With menu item ROOM TEMP HC1, you can select the set room

temperature for day and setback mode for heating circuit 1. Chang-

ing this parameter results in a parallel offset of the heating curve.

The actual room temperature can also be scanned, as soon as the

FE7 or FEK remote control has been connected and allocated to

heating circuit 1.

ROOM TEMP HC1

SET ROOM T DAY

SET ROOM T NGT

ACTUAL ROOM T

BACK

ROOM TEMP HC1

OPERATION

Operation

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4.5.2 Room temperature, heating circuit 2

With menu item ROOM TEMP HC2, you can select the set room

temperature for day and setback mode for heating circuit 2. You

can change the room temperature, if you feel rooms are either

too hot or too cold. ROOM TEMP HC2 will only be displayed if the

mixer ﬂow sensor is connected.

The actual room temperature can also be scanned, as soon as the

FE7 or FEK remote control has been connected and allocated to

heating circuit 2.

ROOM TEMP HC2

SET ROOM T DAY

SET ROOM T NGT

ACTUAL ROOM T

BACK

ROOM TEMP HC2

4.5.3 DHW temperature

With parameter 9, you can allocate a set day and night tempera-

ture to the temperature inside the DHW cylinder.

DHW TEMP

SET DHW T DAY

SET DHW T NGT

ACTUAL DHW T

BACK

DHW TEMP

OPERATION

Operation

10 | WPF basic www.stiebel-eltron.com

4.5.4 Time and date

You can adjust the time and summertime with the TIME/DATE

menu item.

At the factory, summertime is set to begin on 25 March and to

end on 25 October.

TIME/DATE

SET CLOCK

TIME

YEAR

MONTH

DAY

SET CLOCK

BACK

TIME/DATE

4.5.5 Holiday and party program

In HOLIDAY MODE, the heat pump system runs in setback mode

and frost protection for DHW heating is enabled. Holiday mode

is displayed when the ﬂap is closed. For the start of the holidays,

the year, month and day are entered; also enter the year, month

and day for the end of the holidays. The start time is 0:00 h on the

ﬁrst day of the holidays. The end time is 24:00 h on the day the

holiday ends. After the holiday period has expired, the heat pump

system operates again in accordance with the previous heating

and DHW program.

In PARTY MODE, you can extend the day mode for central heating

by a few hours. This is displayed with the ﬂap closed.

HOLIDAY/PARTY

HOLIDAY

YEAR START

MONTH START

DAY START

YEAR END

OPERATION

Operation

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MONTH END

DAY END

HOLIDAY

BACK

HOLIDAY/PARTY

4.5.6 Temperatures

Under menu item TEMPERATURES, you can scan values of the heat

pump or heat pump system.

TEMPERATURES

OUTSIDE

BACK

TEMPERATURES

Actual or set temperatures will not be displayed if the correspond-

ing sensor is not connected.

Example:

Compressor heat amount in heating mode since 0:00 h today in

KWh.

HEAT AMOU DAY kwh

OPERATION

Operation

12 | WPF basic www.stiebel-eltron.com

INFO WPM Meaning

external Outside temperature

ACT ROOM T FE7 Actual room temperature for heating circuit 1 (HC1) or heating circuit 2 (HC2) (will only be displayed if the FE7 remote control is connected)

SET ROOM T FE7 Set room temperature for heating circuit 1 or heating circuit 2 (will only be displayed if the FE7 remote control is connected)

REL HUMIDITY Relative humidity

DEW POINT TEMP Dew point temperature

SET DHW TEMP Set DHW temperature

ACTUAL RTRN T Actual heat pump return temperature - heating circuit 1

SET RTRN TEMP Set heat pump return temperature for heating circuit 1 (HC1). Fixed temperature is displayed for fixed temperature control

ACTUAL MIXER T Actual mixer flow temperature - heating circuit 2

SET MIXER TEMP Set mixer flow temperature - heating circuit 2

FIXED VALUE Set fixed temperature for heating circuit 1

SET BUFFER T Set buffer temperature (highest set value of heating circuits H1 and H2 (H3 if MSM is installed). Fixed temperature will be displayed for

set-value control)

ACTUAL FLOW T Actual heat pump flow temperature

SET FLOW HTG Set central heating flow temperature

ACTUAL SRCE T Actual heat source temperature

SET SRCE TEMP Minimum source temperature

DUAL-MODE HTG Dual-mode point - central heating

DUAL-MODE DHW Dual-mode point - DHW

HEAT LIMIT Limit temperature - central heating

DHW LIMIT Limit temperature - DHW

SYST FROST PRO System frost protection temperature

HOT GAS TEMP Compressor outlet temperature

HIGH PRESSURE HIGH PRESSURE

LOW PRESSURE Low pressure

HEAT AMOU DAY Compressor heat amount in heating mode since 0:00 h today.

TTL HEAT AMOU Total compressor heat amount in heating mode.

HEAT AMOU DAY Compressor heat amount in DHW mode since 0:00 h today.

TTL HEAT AMOU Total compressor heat amount in DHW mode.

TTL HEAT AMOU Total heat amount of the electric booster heater in heating mode

TTL HEAT AMOU Total heat amount of the electric booster heater in DHW mode

OPERATION

Operation

www.stiebel-eltron.com WPF basic | 13

4.5.7 HEATING CURVES

The HTG CURVE menu item enables you to adjust one HTG CURVE

each for heating circuit 1 and 2.

Note: Your contractor will have set up a building and system-spe-

ciﬁc optimum heating curve for every heating circuit. It relates to

the heat pump return temperature for heating circuit 1 and to the

mixer ﬂow temperature for heating circuit 2.

When adjusting the heating curve on the heat pump manager, the

calculated set return or ﬂow temperature, which is subject to the

outside temperature and the set room temperature, will be shown

at the top of the display.

As soon as a temperature has been preselected via the ﬁxed tem-

perature parameter at control level 3, heating circuit 1 will be

hidden, and the display will show FIXED VALUE with the relevant

temperature.

Adjusting the heating curve

C26�03�01�1068

1 32

4

5

6

1 32

1 Relative to an outside temperature of +20 °C

2 Relative to an outside temperature of 0 °C

3 Relative to an outside temperature of -20 °C

4 Day mode

5 Heating circuit 1

6 Setback mode

HEATING CURVES

BACK

OPERATION

Operation

14 | WPF basic www.stiebel-eltron.com

Heating curve diagram

One heating curve can be adjusted for heating circuit 1 and heating

circuit 2 respectively.

At the factory, heating curve 0.6 is set up for heating circuit 1 and

heating curve 0.2 for heating circuit 2.

These heating curves relate to a set room temperature of 20 °C.

1,5

2

1,2

1

0,6

0,4

0,2

2,53

20

18

16

14

12

10

8

6

4

2

0

-2

-4

-6

-8

-10

-12

-14

-16

-18

-20

100

80

60

40

20

0,8

26�03�01�1300

Y Heating circuit 1, heat pump return temperature [°C]

Heating circuit 2, heat pump ﬂow temperature [°C]

X Outside temperature [°C]

Adjustment of programmed changeover between day and

setback mode

The ﬁgure shows a standard heating curve with a slope of 0.8, rel-

ative to a set room temperature for day mode of 20°C. The bottom

curve is setback mode. The set room temperature is reduced to 15

°C for setback mode. The heating curve is shifted down parallel

to the original curve.

20

18

16

14

12

10

8

6

4

2

0

-2

-4

-6

-8

-10

-12

-14

-16

-18

-20

70

60

50

40

30

20

1

2

26�03�01�1301

Y Return/ﬂow temperature [°C]

X Outside temperature [°C]

1 Day mode

2 Setback mode

Adapting a heating curve

Example:

During spring and autumn, the temperature of a building’s heating

system is too low at an outside temperature between 5 °C and

15°C, despite open radiator valves, but is OK at outside tempera-

tures of ≤ 0 °C. This problem can be remedied with a parallel offset

and a simultaneous reduction of the heating curve.

Prior to this adjustment, heating curve 1.0 was adjusted, relative

to a set room temperature of 20 °C. The dotted line indicates the

modiﬁed heating curve at 0.83 and a modiﬁed set room temper-

ature at 23.2 °C.

20

18

16

14

12

10

8

6

4

2

0

-2

-4

-6

-8

-10

-12

-14

-16

-18

-20

70

60

50

40

30

20

26�03�01�1302

Y Return/ﬂow temperature [°C]

X Outside temperature [°C]

OPERATION

Operation

www.stiebel-eltron.com WPF basic | 15

4.5.8 HEATING PROG

The HEATING PROG parameter enables you to determine when and

how often the appliance heats to the set day values for heating

circuit 1 and 2. At all other times, the appliance heats to the set

night temperature. You will have already selected the set values

under menu item ROOM TEMP HC1/2.

You can adjust your heating system as follows:

- for each individual day of the week (Monday, ..., Sunday)

- Monday to Friday (Mo – Fr)

- Saturday and Sunday (Sa – Su)

- the whole week (Mo – Su)

You can adjust three switching time pairs (I, II, III) for each of

these options.

Example:

For heating circuit 1, your heating system should provide heat

daily from Monday to Friday at two different times, i.e. from 05:30

h until 08:30 h as well as from 14:00 h until 22:00 h. For the

weekend, your heating system should provide heat from 08:30 h

until 21:00 h.

HEATING PROG

MON–FRI

HEATING START

HEATING STOP

HEATING CIRC

HEATING START

HEATING STOP

HEATING START

SAT–SUN

HEATING START

HEATING STOP

HEATING START

SAT–SUN

BACK

OPERATION

Operation

16 | WPF basic www.stiebel-eltron.com

BACK

HEATING PROG

4.5.9 DHW programs

The DHW PROGRAM parameter enables you to select the times

when the appliance will control DHW heating using the set day

value. At all other times, the appliance controls DHW heating using

the set night value. You will have already selected the set values

under system parameter DHW TEMP. bereits eingestellt.

You can adjust your DHW heating as follows:

- for each individual day of the week (Monday, ..., Sunday)

- Monday to Friday (Mo – Fr)

- Saturday and Sunday (Sa – Su)

- the whole week (Mo – Su)

You can adjust three switching time pairs (I, II, III) for each of

these options.

Exception: You will need two switching time pairs, if you want to

heat DHW from 22:00 h until 06:00 h the following day.

Example:

You want to heat up DHW daily at two different times, i.e. from

22:00 h until 06:00 h the following day, and then from 08:00 h

until 09:00 h.

The day begins at 00:00 h; therefore begin programming for this

example at 00:00 h. The ﬁrst switching times pair runs from 00:00

until 06:00 h. The second switching time pair runs from 08:00

until 09:00 h. The third switching times pair runs from 22:00 h

until 23:59 h.

DHW PROGRAM

MON–SUN

DHW START

DHW STOP

DHW START

DHW STOP

DHW START

DHW STOP

MON–SUN

BACK

DHW PROGRAM

OPERATION

Maintenance and care

www.stiebel-eltron.com WPF basic | 17

4.6 Remote control FE7

PIC00000609

With the FE7 remote control, the following options are available:

- changing the set room temperature for heating for heating

circuit 1 or 2 by ± 5 °C.

- changing the operating mode.

It offers the following controls:

- one rotary selector for changing the set room temperature

- one rotary selector with the following positions

-

Automatic mode

-

Constant setback mode

-

Constant day mode

Note

The remote control is only active when the WPMiw is in

automatic mode.

4.7 Remote control FEK

Note

In cooling mode, the WPF requires the FEK for area cool-

ing systems, e.g. underﬂoor heating systems, chilled

ceilings, etc. Apart from the room temperature, it also

determines the dew point temperature to prevent con-

densation.

PIC00000704

With the FEK remote control, the following options are available:

- changing the set room temperature for heating for heating

circuit 1 or 2 by ± 5 °C.

- changing the operating mode.

It offers the following controls:

- one rotary selector for changing the set room temperature

- one “Away” button

- one “Info” button

- one key to select the following operating modes:

-

Standby mode

-

Automatic mode

-

Constant day mode

-

Constant setback mode

Note

The parameters heating curve, room temperature and

heating program are not shown at the WPMiw heat pump

manager if the FEK is pre-selected for a speciﬁc heating

circuit.

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.

We recommend a regular inspection (to establish the current con-

dition of the system), and maintenance by a qualiﬁed contractor if

required (to return the system to its original condition).

6. Troubleshooting

Fault Cause Remedy

There is no hot water or

the heating system stays

cold.

The fuse/MCB has blown/

has 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*

26�03�01�1736

1

1 Number on the type plate

INSTALLATION

Safety

18 | WPF basic www.stiebel-eltron.com

INSTALLATION

7. Safety

7.1 General safety information

- Only qualiﬁed contractors should carry out installation, com-

missioning, maintenance and repair of the appliance.

- We guarantee trouble-free operation and operational relia-

bility only if the original accessories and spare parts intend-

ed for the appliance are used.

7.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations

and instructions.

7.2.1 Electrical installation

!

Appliance damage

The speciﬁed voltage must match the mains voltage. Ob-

serve the type plate.

WARNING electrocution

Carry out all electrical connection and installation work

in accordance with national and regional regulations.

DANGER Electrocution

Before any work, isolate the appliance from the power

supply at the control panel.

WARNING electrocution

Only use a permanent connection to the power supply.

The appliance must be able to be separated from the

power supply by an isolator that disconnects all poles

with at least 3mm contact separation. This requirement

can be met by contactors, isolators, fuses etc.

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.

The electric booster heater (internal HS 2) starts if the high pres-

sure sensor or the hot gas limiter responds during DHW heating.

In addition it can cover any residual heat demand, if the heating

system demand exceeds the heat pump output.

8.2 Standard delivery

Delivered with the appliance:

- 1 outside temperature sensor AFS 2

9. Preparations

9.1 General information

Note

The appliance is designed for internal installation, except

in wet areas.

 Never install the appliance directly below or next to

bedrooms.

 Protect pipe transitions through walls and ceilings with an-

ti-vibration insulation.

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

following conditions:

- No risk from frost.

- The room must not be subject to a risk of explosions arising

from dust, gases or vapours.

- When installing the appliance in a boiler room together with

other heating equipment, ensure that the operation of other

heating equipment will not be impaired.

- The volume of the installation room should be at least

13.8m³.

- Load-bearing ﬂoor (for the weight of the internal unit, see

chapter „Speciﬁcation / Data table“).

 For installation on ﬂoating screeds, make provisions for quiet

heat pump operation.

 Isolate the mounting surface around the heat pump by re-

cesses. After completing the installation, seal these recesses

with a water-impervious and sound insulating material, such

as silicone for example.

1 2 3 54

26�03�01�1466

1 Concrete base

2 Impact sound insulation

3 Floating screed

4 Floor covering

5 Recess

INSTALLATION

Mounting

www.stiebel-eltron.com WPF basic | 19

9.2 Electrical installation

In accordance with VDE 0298-4, use the following cable cross-sec-

tions subject to their fuse protection:

Fuse/MCB

rating

Assignment Cable cross-section

C 16 A Compressor

(three phase)

2.5 mm²

B 16 A

Electric emergency/

booster heater (BH)

(three phase)

2.5 mm²

1.5 mm² with only two live cores and

routing on a wall or in an electrical con-

duit on a wall.

C 16 A

Compressor

WPF 5 S basic

(single phase)

1.5 mm² for open routing. Note the type

of routing!

2.5 mm² for routing through a

wall. Note the type of routing!

C 25 A

Compressor

WPF 7 S basic /

WPF 10 S basic

(single phase)

4.0 mm² for open routing. Note the type

of routing!

6.0 mm² for routing through a

wall. Note the type of routing!

C 35 A

Electric emergency/

booster heater (BH)

(single phase)

4.0 mm² when routing a multi core line

on a wall or in an electrical conduit on

a wall.

6.0 mm² for routing through a

wall. Note the type of routing!

B 16 A Control circuit fuse

(three phase)

1.5 mm²

C 16 A Control circuit fuse

(single phase)

1.5 mm²

The electrical data is given in the “Speciﬁcation” chapter.

Provide separate fuses for the two power circuits of the appliance

and the control unit.

9.3 Buffer cylinder

Note

In combination with the WPF 13 basic and the WPF 16

basic, it is absolutely imperative to use a buffer cylinder.

A buffer cylinder is recommended to ensure trouble-free appliance

operation.

The buffer cylinder provides hydraulic separation of the ﬂow rates

in the heat pump circuit and the heating circuit.

 When operating without a buffer cylinder, observe the details

speciﬁed in the chapter “Minimum ﬂow rate without buffer

cylinder”.

10. Mounting

10.1 Handling

 Transport the appliance in its packaging to protect it against

damage.

 Protect the appliance against heavy impact during transport.

- 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 “Dimensions

and connection”).

 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 from the refrig-

eration unit. D. h. That means, the six plinth screws must

not be reﬁtted.

INSTALLATION

Mounting

20 | WPF basic www.stiebel-eltron.com

10.3 Removing the casing panels

When removing the front cover ensure, that the cables, which

connect the heat pump manager with the control panel, are not

torn off.

The same applies to the earth connection which electrically con-

nects the front cover to the casing.

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.

10.4.1 Permitted 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: 161696

10.4.2 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, h. 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%.

10.4.3 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. The brine volume

of the heat pump under operating conditions can be found in the

data table (see chapter “Speciﬁcation”).

The overall volume is equal to the required amount of brine made

by mixing undiluted ethylene glycol and water. The chloride con-

tent of the water must not exceed 300 ppm.

Mixing ratio

The brine concentration varies when using a ground 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 %

Charging the brine circuit

Note

The WPF S series does not have a brine pressure switch.

Note

 Insulate the brine lines with diffusion-proof thermal

insulation.

Note

The brine pressure switch is bridged to the power supply

utility contact at the factory.

 To activate the brine pressure switch, remove the

jumper.

The brine/water heat pump is equipped with a brine pressure

switch in the brine circuit. The brine pressure switch prevents

brine getting into the ground if there is a leak in the brine circuit.

If the pressure in the brine circuit falls below 0.7bar, the brine

pressure switch turns the heat pump off. In order for the heat

pump to be enabled again, the pressure must be raised to at least

1.5bar while the heat pump is on standby.

To prevent the brine pressure switch turning the heat pump off

when there is no leak, charge the heat source side of the heat

pump during installation with a minimum pressure of >1.5bar.

 Fill the system according to the following curve.

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