STIEBEL ELTRON wpf 20, wpf 35, wpf 40, wpf 27, wpf 52 Operation And Installation

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OPERATION ANd INsTAllATION

BRINE | WATER HEAT PUMPs

» WPf 20 » WPf 27 » WPf 35 » WPf 40 » WPf 52 » WPf 66 » WPf 27 HT

CONTENT

SPECIAL INFORMATION _____________________________________________3

OPERATION __________________________________________________________4

1. General information ��4

1.1 Safety information �� 4

1.2 Other symbols in this documentation �� 4

1.3 Units of measurement �� 4

1.4 Heat pump output data �� 4

2. Safety �� 4

2.1 Correct use �� 4

2.2 Safety instructions �� 4

2.3 CE designation �� 4

3. Device description ��5

3.1 Operational characteristics �� 5

3.2 Function �� 5

4. Control ��5

5. Maintenance and care ��5

6. Other problems ��5

INSTALLATION _______________________________________________________6

7. Safety �� 6

7.1 General safety instructions �� 6

7.2 Instructions. standards and regulations �� 6

8. Device description ��6

8.1 WPF 20 | 27 �� 6

8.2 WPF 35 | 40 | 52 | 66 �� 7

8.3 WPF 27 HT �� 7

9. Standard delivery ��8

9.1 Accessories �� 8

10. Installation ��8

10.1 Transport �� 8

10.2 Positioning �� 8

10.3 Installation of the heat pump system �� 9

10.4 Installation of the heat consumer system �� 10

10.5 Fitting the casing parts �� 12

10.6 Removing the casing parts �� 13

10.7 Power supply �� 14

10.8 Modules �� 14

11. Commissioning �� 16

11.1 Operation and control �� 16

12. Maintenance �� 16

13. Troubleshooting �� 17

13.1 DIP switch (heat pump) �� 17

13.2 DIP switch (BA) �� 17

13.3 LEDs ________________________________________________________ 17

14. Speciﬁcation �� 18

14.1 Water and brine connection �� 18

14.2 Wiring diagrams for heat pump WPF 20 | 27 �� 19

14.3 Wiring diagrams for heat pump WPF WPF 35 | 40 �� 20

14.4 Wiring diagrams for heat pump WPF WPF 52 | 66 �� 21

14.5 Wiring diagrams for heat pump WPF WPF 27 HT �� 22

14.6 Output diagrams WPF 20 �� 24

14.7 Output diagrams WPF 27 �� 26

14.8 Output diagrams WPF 27 HT �� 28

14.9 Output diagrams WPF 35 �� 30

14.10 Output diagrams WPF 40 �� 32

14.11 Output diagrams WPF 52 �� 34

14.12 Output diagrams WPF 66 �� 36

14.13 Data table �� 38

WARRANTY ENVIRONMENT AND RECYCLING _________________________________ 43

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SPECIAL INFORMATION

- 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 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.

- 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 trouble-free operation of the appliance and facilitate maintenance work.

- At the WPM II. set parameter source in the commissioning list to "Ethylene glycol". otherwise the frost stat would stop the heat pump at temperatures below 7 °C.

- Maintenance work, such as checking the electrical 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 protection 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 automatic summer/winter changeover.

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OPERATION

GENERAL INFORMATION | SAFETY

OPERATION

1. General information

The chapter entitled “Operation” is intended for appliance users and contractors.

The chapter entitled “Installation” is intended for contractors.

Note

Read these instructions carefully before using the appliance and retain them for future reference. Pass on the instructions to a new user if required.

1.1 Safety information

1.1.1 Structure of safety information

KEYWORD Type of risk Here, possible consequences are listed that may result from non-observation of the safety information.

f Steps to prevent the risk are listed.

1.1.2 Symbols, type of risk

Symbol Type of risk

Injury

Electrocution

1.4 Heat pump output data

Information regarding the measuring method and interpretation of the heat pump output data provided in these operating and installation instructions:

The output data provided in the text and diagrams of these operating and installation instructions has been calculated according to the standardised measuring conditions of EN14511.

Please note that these standardised measuring conditions do not always wholly match the local on-site conditions of the individual system user. The discrepancy may be signiﬁcant, depending on the measuring method selected, i.e. the degree of deviation of the selected method, from the conditions stipulated in EN14511. Further factors that may have an inﬂuence on the measured values are the measuring equipment, the system conﬁguration, the age of the system and the ﬂow rates.

It is only possible to conﬁrm the output data provided in these operating and installation instructions for a speciﬁc heat pump if the measurement used for test purposes was taken under identical conditions and parameters, i.e. in accordance with EN14511.

2. Safety

2.1 Correct use

The appliance is designed for central heating within the application limits given in the speciﬁcation.

This appliance is designed for domestic use. It can be safely operated by untrained personnel. The appliance can also be used in a non-domestic environment, e.g. in a small business, as long as it is used in the same way.

Any other use beyond that described shall be deemed inappropriate. Observation of this document is also part of the correct use of the unit. Any changes or conversions to the appliance void any warranty.

1.2 Other symbols in this documentation

Symbol

Note

Notes are bordered by horizontal lines above and below the text. General information is identiﬁed by the symbol shown on the left.

f This symbol indicates that you have to do something. The

action you need to take is described step by step.

Damage to the appliance and environment

f Read these texts carefully.

1.3 Units of measurement

Note

All measurements are given in mm unless stated otherwise.

2.2 Safety instructions

Observe the following safety information and instructions.

The electrical installation and installation of the refrigerant circuit must only be carried out by a recognised. qualiﬁed contractor or by qualiﬁed Stiebel Eltron customer service engineers.

The recognised contractor is responsible for adherence to all currently applicable instructions during installation and commissioning.

Operate this device only if it is fully installed and all safety equipment is ﬁtted.

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OPERATION

DEVICE DESCRIPTION | CONTROL | MAINTENANCE AND CARE

Danger to life through electrocution!

Never spray the device with water or other liquids.

Risk of damage!

Prior to maintenance work. isolate the device from its power supply.

DANGER Injury

he 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 resulting risks. Children must never play with the appliance. Children must never clean the appliance or perform user maintenance unless they are supervised.

2.3 CE designation

The CE designation shows that the device meets all the essential requirements:

- Electrical Compatibility Directive (2004/108/EC)

- Low Voltage Directive (2006/95/EC)

- Pressure Equipment Directive (97/23/EC)

The rating plate is located at the back of the heat pump.

5. Maintenance and care

Risk of damage!

Maintenance work. such as checking the electrical safety. must only be carried out by a qualiﬁed electrician. Protect the equipment from dust and dirt ingress during building work.

A damp cloth is sufﬁcient for cleaning all plastic and sheet steel parts. Do not use abrasive or corrosive cleaning agents!

6. Other problems

Check the fuse/circuit breaker in your fuse box. If it has blown/ tripped. replace/reset the fuse/MCB. Notify your local contractor if the fuse/MCB blows/trips again.

If you cannot remedy the fault, notify your qualiﬁed contractor. To facilitate and speed up your enquiry, please provide the serial number from the type plate.

Sample type plate

*xxxxxxxxxxxxxxxxxx*

3. Device description

3.1 Operational characteristics

The WPF is a heating heat pump designed as brine/water heat pump. The heat pump extracts energy from the heat source medium. i.e. brine. at a low temperature level. This extracted energy is then transferred to the heating water at a higher level. enriched with the energy drawn by the compressor. Subject to the heat source temperature. the heating water can be heated up to a ﬂow temperature of 60 °C.

With heat pump type WPF HT. subject to the heat source temperature. the heating water can be heated to a flow temperature of up to 75 °C.

A modular operation is possible with the WPF.

3.2 Function

The heat source medium (brine) enters the heat pump evaporator. There. heat is extracted from the medium. so it exits the heat pump at a lower temperature.

The energy made useful through the heat pump is transferred to the heating water inside the condenser.

Then. the heating water transfers its energy to the heating circuit.

4. Control

The heat pump is exclusively controlled by the heat pump manager WPM II. Therefore. observe the instructions in the chapter Operation in the operating and installation instructions of the heat pump manager WPM II.

Montageanweisung beachten! Dichtheit geprüft!

1 Number on the type plate

Made in Germany

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INSTALLATION

SAFETY | DEVICE DESCRIPTION

INSTALLATION

7. Safety

Only qualified contractors should carry out installation. commissioning. maintenance and repair of the appliance.

7.1 General safety instructions

We guarantee trouble-free operation and operational reliability only if the original accessories and spare parts intended for the appliance are used.

7.2 Instructions. standards and regulations

Observe all applicable national and regional regulations and instructions.

8. Device description

8.1 WPF 20 | 27

1 Electrical terminals 2 Condenser 3 Fill & drain valve (heating) 4 Sight glass 5 Expansion valve 6 Fill & drain valve (brine) 7 Compressor 8 Evaporator

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INSTALLATION

DEVICE DESCRIPTION

8.2 WPF 35 | 40 | 52 | 66

1 Electrical terminals 2 Condenser 3 Fill & drain valve (heating) 4 Sight glass

8.3 WPF 27 HT

5 Expansion valve 6 Fill & drain valve (brine) 7 Compressor 8 Evaporator

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1 Electrical terminals 2 Condenser 3 Fill & drain valve (heating) 4 Sight glass

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5 Expansion valve 6 Fill & drain valve (brine) 7 Compressor 8 Evaporator

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INSTALLATION

Standard delivery |

INSTALLATION

9. Standard delivery

Heat pumps are delivered in two shipping units.

Designation Part no.

Standard heat pump device Casing parts 223384

9.1 Accessories

Designation Part no.

Heat pump manager with wall mounting enclosure. WPMW II 185450 Heat pump manager as control panel mounted version. WPMS II 185451 Mixer module with wall mounting enclosure. MSMW 074012 Mixer module as control panel mounted version. MSMS 074011 Cylinder SBP 700 E 185459 Cylinder SBP 700 E SOL 185460 Kit WPVB 227760 Heating system remote control FE 7 185579 Contact sensor AVF 6 165341 Immersion sensor TF 6 165342 Heat transfer medium (concentrate) (10 litre can) 231109 Heat transfer medium (concentrate) (30 litre can) 161696

10. Installation

10.1 Transport

To protect the equipment against damage. transport it vertically inside its packaging. Storage and transport at temperatures below – 20 °C and in excess of + 50 °C are not permissible.

In the top of the frame are four holes for ﬁtting lifting eyes M 12 where the equipment can be lifted.

The casing parts are delivered in a separate package. and these are ﬁtted to the device at the place of installation.

≥500

≥1000

2 heat pumps may also be stacked.

f For this, use the WPVB joining set.

≥500

D0000019260

10.2 Positioning

10.2.1 General

Level the device horizontally by adjusting the equipment feet. To prevent the heat pump from being damaged by frost in case

of external installation. ﬁt and electrically connect the contact sensor AVF 6 into the heating return as frost protection. Electrical connection and sensor installation. see chapter "Power supply".

f Observe the minimum clearances.

2269

1154 1115

D0000020355

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INSTALLATION

10.2.2 External installation

We recommend foundations as base for the device.

Route all supply lines inside a conduit that is free from frost (protective pipe).

Protect the connection area at the back panel against all weather and solar inﬂuences.

10.2.3 Internal installation

The room where the WPF is to be installed must meet the following conditions:

- Load-bearing ﬂoor. For the weight of the WPF. see "Speciﬁcation".

- For a quiet heat pump operation on ﬂoating screeds. recess the screed and the anti-vibration insulation around the installation location

of the heat pump.

- The room must not be subject to a risk of explosions arising from dust. gases or vapours. Never allow the ﬂoor area and the volume of the installation room to be less than the minimum values listed in the table.

Typ Volume Floor area

WPF 20 14 m³ 5 m² WPF 27 | WPF 27 HT 16 m³ 7 m² WPF 35 23 m³ 9 m² WPF 40 23 m³ 9 m² WPF 52 28 m³ 11 m² WPF 66 33 m³ 13 m²

- When installing the WPF in a boiler room together with other heating equipment ensure. that the operation of other heating equipment will not be impaired.

10.2.4 Sound emission.

Never install the heat pump immediately below or adjacent to bedrooms. Insulate pipes through walls and ceilings against structure-borne noise transmission.

10.3 Installation of the heat pump system

26�03�01�0803

The layout of the connection material on the soruce side has to be done according to the evaporator and condensator materials (Technical Datas) to avoide corrosion.

Design the heat source system for the brine/water heat pump in accordance with Stiebel Eltron technical guides.

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

10.3.1 Circulation pump and required ﬂow rate

Use a circulation pump with compound-ﬁlled windings to supply the brine. to prevent an earth short circuit through condensation in the electrical part of the pump (cold water version).

Size the circulation pump in accordance with the system-speciﬁc conditions. i.e. nominal ﬂow rate and pressure drop must be taken into consideration (see "Speciﬁcation").

An adequate ﬂow rate must be safeguarded at every possible brine temperature. i.e.:

Size the nominal ﬂow rate at brine temperature 0 °C with a tolerance of + 10 %.

10.3.2 Connection and ﬁlling with brine

Prior to connecting the heat pump. check the heat source circuit for possible leaks. and ﬂush thoroughly.

Calculate the volume of the heat source circuit. You can obtain the brine volume inside the heat pump from the "Speciﬁcation" table.

The overall volume equals that of the required amount of brine that should be mixed from undiluted ethylene glycol and water. The chloride content of the water must not exceed 300 ppm.

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1 Concrete ceiling 2 Impact sound insulation 3 Floating screed 4 Recess

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INSTALLATION

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%

After ﬁlling the system with brine and prior to commissioning. open the ﬁll & drain valve until brine runs out of it. No water must remain in the pipe run to the ﬁll & drain valve.

10.3.3 Check the brine concentration:

f Determine the density of the ethylene glycol/water mixture,

e.g. with a hydrometer.

Using the actual density and temperature, you can check the actual concentration in the diagram.

1,10

1,09

1,08

1,07

1,06

1,05

1,04

1,03

1,02

1,01

1,00

0,99

0,98

-20 0 20 40 60 80 100

50 Vol.-%

X Temperature [°C] Y Density [g/cm³] A Frost protection [°C]

Note

The quoted details refer to ethylene glycol (see "Speciﬁcation").

10.3.4 Checking the ﬂow rate (during heat pump commissioning)

Check the ﬂow and return temperatures of the heat source. For this. determine the temperature differential by measuring the temperature under the thermal insulation on both ﬂow and return pipes of the heat pump.

The diagram shows the temperature spread at the nominal ﬂow rate.

-5 0 5 10 15 20

Y Temperature differential X Source inlet temperature 1 Brine = heating ﬂow 35 °C 2 Brine = heating ﬂow 50 °C

Risk of damage!

At the WPM II. set parameter source in the commissioning

list to "Ethylene glycol". otherwise the frost stat would stop the heat pump at temperatures below 7 °C. The source inlet temperature can be checked on the display of the WPM II under the Info Temp. system parameter.

10.4 Installation of the heat consumer system

The layout of the connection material on the heating side has to be done according to the evaporator and condensator materials (Technical Datas) to avoide corrosion.

Implement the heat consumer system (heating circuit) in accordance with current technical rules. For safety equipment in heating systems. consult the DIN EN 12828.

Ensure the correct connection of the heating ﬂow and return.

26�03�01�1914

Protect the heating water lines against frost and moisture (only in case of external installation). Protect ﬂow and return lines in external installations with an adequate amount of thermal insulation against frost and by routing them inside a conduit against moisture

Maintain the required insulation thickness in accordance with the Heating System Order [or local regulations].

The integral frost protection control (inside the heat pump). that automatically starts the circulation pump in the heat pump circuit at + 8 °C and thereby safeguards circulation in all water-bearing components. offers additional frost protection. The heat pump is started automatically no later than when the temperature inside the buffer cylinder drops below + 5 °C.

Prior to connecting the heat pump. check the heating system for leaks. ﬂush it thoroughly. ﬁll and carefully vent it.

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INSTALLATION

10.4.1 Oxygen diffusion

Risk of damage

In underfloor heating systems. avoid open heating

systems or the installation of steel pipes in conjunction with plastic pipes that are permeable to oxygen.

Steel components. such as radiators and pipes. can corrode if plastic underﬂoor heating system pipes. which are permeable to oxygen. are used.

The products of corrosion. e.g. rusty sludge. can settle inside the heat pump condenser and result in a lower output by reducing the cross-section. or in a shutdown being activated by the high pressure limiter.

10.4.2 Filling the heating system

Water quality

A ﬁll water analysis must be available prior to charging the system. This may, for example, be requested from the relevant water supply utility.

Material losses

To avoid damage as a result of scaling, it may be necessary to soften or desalinate the ﬁll water. The ﬁll water limits speciﬁed in chapter "Speciﬁcation / Data table" must always be observed.

f Recheck these limits 8-12 weeks after

commissioning and as part of annual system maintenance.

10.4.6 Second external heat source

For dual-mode heating systems. always connect the heat pump into the return of the second heat source (e.g. oil ﬁred boiler).

High heating water temperature: In dual-mode heating systems. the return water from the second heat source can ﬂow through the heat pump. immediately after it has been switched off. with a max. temperature of 60 °C. The temperature may be 70 °C no earlier than ten minutes after the heat pump has been shut down.

10.4.7 Heat meter

Observe the additional pressure drop when installing heat meters on the heating side. The sieves inside the heat meters are easily blocked by dirt particles in the heating circuit. further increasing the pressure drop.

Note

With conductivity of >1000μS/cm, desalination treatment is recommended in order to avoid corrosion.

Note

Suitable appliances for water softening and desalinating, as well as for charging and ﬂushing heating systems, can be obtained via trade suppliers.

Note

If you treat the ﬁll water with inhibitors or additives, the same limits as for desalination apply.

10.4.3 Buffer cylinder

A buffer cylinder is recommended to ensure a trouble-free heat pump operation. The buffer cylinder provides hydraulic separation of the volume ﬂow in the heat pump circuit and the heating circuit. The ﬂow rate in the heat pump remains constant if. for example. the ﬂow rate in the heating circuit is reduced by thermostatic valves.

10.4.4 Circulation pump (cylinder primary pump)

When using a buffer cylinder. observe the pressure drop of the evaporator. of the connecting lines. bends. valves etc. in sizing the circulation pump to be installed.

10.4.5 Circulation pump (heating circuit pump)

Where no buffer cylinder is used. size the circulation pump on the heating side taking the condenser pressure drop into consideration. The ﬂow rate at DT = 10 K (see "Speciﬁcation") of the heat pump must be assured under all operating conditions of the heating system through the installation of an overﬂow valve.

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INSTALLATION

10.5 Fitting the casing parts

Fitting the plinth facia and control panel frame

3.2.

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f Hook the plinth facia 1 into the device frame and secure each with three screws f Position the covers 2 and secure each with two screws to the sides.

Fitting the side covers

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f Fix the guard plate 1 with four screws. The both in the front with the toothed locked washer. f Secure the control panel frame 2 with ﬁve screws.

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INSTALLATION

Fitting the side panels

f Hook the side panels 1 from the top into the slots and hooks

provided and secure with one screw each at the bottom of the control panel frame.

f Install sound insulation 2 in the control panel frame

Fit front panel

C26�03�01�0793

Fit centre cover

C26�03�01�0794

f Position the cover at the front of the device and push it back;

then secure it with two screws.

f Make the power supply before the centre cover and front

panel are ﬁtted.

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10.6 Removing the casing parts

f Hook the bottom of the front panel into the control panel

frame. pivot it towards the frame and secure with one screw on each side.

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The casing parts are removed in reverse order.

INSTALLATION

10.7 Power supply

Notify your local power supply utility of the electrical connection. Only qualiﬁed electricians must carry out the installation in

accordance with these instructions.

Danger to life through electrocution!

Before any work. isolate the equipment from the power supply at the control panel.

Observe VDE 0100 [or local regulations] and the regulations of your local power supply utility.

The heat pump must be able to be separated from the mains power supply by an additional isolator. that disconnects all poles with at least 3 mm contact separation. For this purpose. use contactors. main isolators. fuses. etc. on site.

The terminals are located above the control panel. Remove the lid to enable the equipment to be connected.

The following are connected at the terminals:

- the power supply of the IWS heat pump control unit

- the compressor power supply

- the brine pump power supply

- the BUS cable (J-Y (St) 2x2x0.8) Ensure that High. Low and Ground are correctly connected.

- the enable signal for the stand-alone operation at terminal X4/2. For this. remove the jumper between X4/L and X4/2.

The IWS (integral heat pump controller) is a PCB that is ﬁtted as standard into the heat pump control panel. The IWS controls the contactors of the compressors and the starting current limiter. receives the signal inputs for high pressure. low pressure and central faults and contains the BUS interface to the WPM II.

Use appropriate cables in accordance with local regulations for all connections. For this. observe the Electrical details in "Speciﬁcation" and the Electrical connection diagram.

Check the strain relief function. Observe the operating instructions for the WPM II heat pump

manager. Connect the circulation pump for the heat consumers in accordance

with the electrical connection diagram documentation.

In case of external installation. use only weather-proof connecting cables to VDE 0100 [or local regulations]. As a minimum requirement. use cables with rubber sheathing with the identiﬁcation 60245 IEC 57. Route all lines inside a conduit (protective pipe).

or the engineering

To prevent the heat pump from being damaged by frost in case of external installation or when installing it in a room that is not free from the risk of frost. ﬁt and electrically connect the contact sensor AVF 6 at the heating-return. The contact sensor is electrically connected at terminals X2/4 and X2/5.

The heating circuit pumps are started when the heating-return temperature falls to +8 °C. The reverse switching hysteresis is 4 K.

Sensor installation:

f Thoroughly clean the pipe. f Apply heat conducting paste A. f Secure the sensor with a tie.

STAND-ALONE operation

In emergencies. this heat pump can also operate without the heat pump manager (see troubleshooting).

Route all connecting cables and sensor leads through the apertures in the back panel.

10.8 Modules

When using a modular approach. connect the individual heat pumps via terminal BUS 1. 2. 3. Ensure that High. Low and Ground are correctly connected at the WPM II as well as at the heat pump.

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STIEBEL ELTRON wpf 20, wpf 35, wpf 40, wpf 27, wpf 52 Operation And Installation

Specifications and Main Features

Frequently Asked Questions

User Manual