Vaillant VWL 57/5 IS, VWL 77/5 IS, VWL 75/5 AS, VWL 105/5 AS, VWL 125/5 AS Operating, Installation And Maintenance Instructions

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en Operating instructions en Installation and maintenance

instructions

Hydraulic station

VWL 57 ... 127/5 IS

Publisher/manufacturer Vaillant GmbH

Berghauser Str. 40

D-42859 Remscheid

Tel. +492191 18 0

Fax +492191 18 2810

[email protected]

www.vaillant.de

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en Operating instructions ....................................... 1

en Installation and maintenance instructions...... 14

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Contents

0020257319_02 Hydraulic station Operating instructions 1

Operating instructions

Contents

1 Safety .................................................................... 2

1.1 Action-related warnings ......................................... 2

1.2 Intended use .......................................................... 2

1.3 General safety information .................................... 2

2 Notes on the documentation .............................. 4

2.1 Observing other applicable documents ................. 4

2.2 Storing documents................................................. 4

2.3 Validity of the instructions...................................... 4

3 Product description............................................. 4

3.1 Heat pump system ................................................. 4

3.2 Design of the product............................................. 4

3.3 Control elements.................................................... 4

3.4 Control panel ......................................................... 5

3.5 Description of the symbols .................................... 5

3.6 Functional description of buttons........................... 5

3.7 Type designation and serial number ..................... 5

3.8 CE marking ............................................................ 6

3.9 Fluorinated greenhouse gases .............................. 6

3.10 Safety devices ....................................................... 6

4 Operation.............................................................. 6

4.1 Basic display.......................................................... 6

4.2 Operating concept ................................................. 6

4.3 Menu display.......................................................... 6

4.4 Starting up the product .......................................... 7

4.5 Checking the filling pressure in the heat pump

circuit ..................................................................... 8

4.6 Setting the heating flow temperature..................... 8

4.7 Setting the domestic hot water temperature .......... 8

4.8 Switching off the product's functions ..................... 8

5 Care and maintenance ........................................ 8

5.1 Caring for the product............................................ 8

5.2 Maintenance .......................................................... 9

5.3 Reading maintenance messages .......................... 9

5.4 Checking the system pressure .............................. 9

6 Troubleshooting .................................................. 9

6.1 Reading fault messages ........................................ 9

6.2 Detecting and eliminating faults............................. 9

7 Decommissioning................................................ 9

7.1 Temporarily decommissioning the product............ 9

7.2 Permanently decommissioning the product........... 9

8 Recycling and disposal ....................................... 9

8.1 Disposing of the product and the accessories....... 9

8.2 Arranging disposal of refrigerant ......................... 10

9 Guarantee and customer service..................... 10

9.1 Guarantee............................................................ 10

Appendix ............................................................................11

A Troubleshooting ................................................ 11

B Overview of the end user operating level ....... 11

Index ...................................................................................13

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1 Safety

2 Operating instructions Hydraulic station 0020257319_02

1 Safety

1.1 Action-related warnings

Classification of action-related warnings

The action-related warnings are classified in accordance with the severity of the possible danger using the following warning signs and signal words:

Warning symbols and signal words

Danger!

Imminent danger to life or risk of severe personal injury

Danger!

Risk of death from electric shock

Warning.

Risk of minor personal injury

Caution.

Risk of material or environmental damage

1.2 Intended use

There is a risk of injury or death to the user or others, or of damage to the product and other property in the event of improper use or use for which it is not intended.

The product is the indoor unit of an air-towater heat pump with split construction.

The product uses the outdoor air as a heat source and can be used to heat a residential building and for domestic hot water generation.

The product is intended exclusively for domestic use.

The intended use only allows for these product combinations:

Outdoor unit Indoor unit

VWL ..5/5 AS ... VWL ..8/5 IS ...

VWL ..7/5 IS ...

Intended use includes the following:

– observance of the operating instructions

included for the product and any other installation components

– compliance with all inspection and main-

tenance conditions listed in the instructions.

This product can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the product in a safe way and understand the hazards involved. Children must not play with the product. Cleaning and user maintenance work must not be carried out by children unless they are supervised.

Any other use that is not specified in these instructions, or use beyond that specified in this document, shall be considered improper use. Any direct commercial or industrial use is also deemed to be improper.

Caution.

Improper use of any kind is prohibited.

1.3 General safety information

1.3.1 Danger caused by improper operation

Improper operation may present a danger to you and others, and cause material damage.

▶ Carefully read the enclosed instructions

and all other applicable documents, particularly the "Safety" section and the warnings.

▶ Only carry out the activities for which in-

structions are provided in these operating instructions.

1.3.2 Risk of death due to changes to the product or the product environment

▶ Never remove, bridge or block the safety

devices.

▶ Do not tamper with any of the safety

devices.

▶ Do not damage or remove any tamper-

proof seals on components.

▶ Do not make any changes:

– The product itself – The water and electricity supply lines – to the expansion relief valve – to the drain pipework – to constructional conditions that may

affect the operational reliability of the product

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Safety 1

0020257319_02 Hydraulic station Operating instructions 3

1.3.3 Risk of injury and material damage due to maintenance and repairs carried out incorrectly or not carried out at all

▶ Never attempt to carry out maintenance

work or repairs on your product yourself.

▶ Faults and damage should be immediately

rectified by a competent person.

▶ Adhere to the maintenance intervals spe-

cified.

1.3.4 Risk of material damage caused by frost

▶ Ensure that the heating installation always

remains in operation during freezing conditions and that all rooms are sufficiently heated.

▶ If you cannot ensure the operation, have a

competent person drain the heating installation.

1.3.5 Risk of injury from freezing caused by touching refrigerant

The product is delivered with an operational filling of R410A refrigerant. Escaping refrigerant may cause freezing if the exit point is touched.

▶ If refrigerant escapes, do not touch any

components of the product.

▶ Do not inhale any vapours or gases that

escape from the refrigerant circuit as a result of leaks.

▶ Avoid skin or eye contact with the refriger-

ant.

▶ In the event of skin or eye contact with the

refrigerant, seek medical advice.

1.3.6 Risk of chemical burns caused by brine fluid

The brine fluid ethylene glycol is harmful to health.

▶ Avoid contact with the skin and eyes. ▶ Always wear gloves and protective

goggles.

▶ Do not inhale or swallow. ▶ Observe the safety data sheet that accom-

panies the brine fluid.

1.3.7 Risk of injury from burns caused by touching refrigerant pipes

The refrigerant pipes between the outdoor unit and the indoor unit may become extremely hot during operation. There is a risk of burns.

▶ Do not touch any uninsulated refrigerant

pipes.

1.3.8 Risk of malfunctions caused by incorrect power supply

The power supply must remain within the specified limits so that the product does not malfunction:

– Single-phase: 230 V (+10/-15%), 50 Hz – Three-phase: 400 V (+10/-15%), 50 Hz

1.3.9 Risk of environmental damage caused by escaping refrigerant

The product contains the refrigerant R410A. This refrigerant must not be allowed to escape into the atmosphere. R410A is a fluorinated greenhouse gas covered by the Kyoto Protocol, with a GWP of 2088 (GWP = Global Warming Potential). If this gas escapes into the atmosphere, its impact is 2088 times greater than the natural greenhouse gas CO2.

Before the product is disposed of, the refrigerant that is contained in it must be completely drained into a suitable vessel so that it can then be recycled or disposed of in accordance with regulations.

▶ Ensure that only an officially certified com-

petent person with appropriate protective equipment carries out installation or maintenance work or any other form of intervention on the refrigerant circuit.

▶ Arrange for the refrigerant that is contained

in the product to be recycled or disposed of by a certified competent person in accordance with the regulations.

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2 Notes on the documentation

4 Operating instructions Hydraulic station 0020257319_02

2 Notes on the documentation

2.1 Observing other applicable documents

▶ You must observe all operating instructions enclosed with

the system components.

2.2 Storing documents

▶ Keep this manual and all other applicable documents

safe for future use.

2.3 Validity of the instructions

These instructions apply only to:

Product Outdoor unit

VWL 57/5 IS VWL 35/5 AS

VWL 55/5 AS

VWL 77/5 IS VWL 75/5 AS

VWL 127/5 IS VWL 105/5 AS

VWL 125/5 AS

3 Product description

3.1 Heat pump system

Design of a typical heat pump system with split technology:

1 2

1 Heat pump | Outdoor

unit

2 eBUS line

3 System control (op-

tional)

4 Control for the indoor

unit

5 Heat pump | Indoor unit

6 Refrigerant circuit

3.2 Design of the product

1 Optional installation site

for the system control

2 Reset button

3 Control elements

3.3 Control elements

reset

120

kWh/d

3 2 1

1 System control (optional

accessory)

2 Reset button

3 Control elements

4 Display

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Product description 3

0020257319_02 Hydraulic station Operating instructions 5

3.4 Control panel

120

kWh/d

reset

1 Displays the daily envir-

onmental energy yield

2 Display of the current

assignment of the righthand selection button

3 Left- and right-hand

selection buttons

and button

5 Reset button

6 Access to the menu for

additional information

7 Display of the current

configuration of the lefthand selection button

8 Displays the symbols

for the current operating status of the heat pump

9 Display

3.5 Description of the symbols

If you do not press any buttons within one minute, the light goes out.

Symbol Meaning Explanation

Compressor power

– Not filled: Compressor not in

operation

– Partially filled: Compressor in

operation. Partial load mode.

– Fully filled: Compressor in

operation. Full load mode.

bar

Filling pressure in the heating circuit

The dashed lines show the permitted range.

– Displayed statically: Filling

pressure in the permitted range

– Displayed flashing: Filling

pressure outside of the permitted range

Noise reduction mode

– Operation with reduced

sound emissions

Symbol Meaning Explanation

Electric back-up heater

– Displayed flashing: Electric

back-up heater in operation

– Displayed together with the

"Heating mode" symbol: Electric back-up heater active for heating mode

– Displayed together with

the "Domestic hot water generation" symbol: Electric back-up heater active for domestic hot water mode

eco mode – Energy-saving domestic hot

water mode

Heating mode – Heating mode active

Domestic hot water generation

– Domestic hot water mode

active

Cooling mode – Cooling mode active

F. X X X

Fault condition – Appears instead of the basic

display, may be an explanatory plain text display

3.6 Functional description of buttons

The two selection buttons are soft keys, meaning that they can be assigned different functions.

Button Meaning

– Cancelling the change to a set value or

activating an operating mode

– Calling up a higher selection level in the

– Confirming a set value or activating an oper-

ating mode

– Calling up a lower selection level in the

Calling up the additional functions

– Navigating between individual menu items – Increasing or decreasing the chosen set

value

Adjustable values flash in the display.

You must always confirm a change to a value. Only then is the new setting saved. You can press to cancel a process at any time. If you do not press any buttons for longer than 15 minutes, the display returns to the basic display.

3.7 Type designation and serial number

The type designation and serial number are on the data plate.

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4 Operation

6 Operating instructions Hydraulic station 0020257319_02

3.8 CE marking

The CE marking shows that the products comply with the basic requirements of the applicable directives as stated on the data plate.

The declaration of conformity can be viewed at the manufacturer's site.

3.9 Fluorinated greenhouse gases

The product contains fluorinated greenhouse gases in a hermetically sealed device. As specified in the technical specifications from the manufacturer, the tested leak rate for the electrical switchgear is less than 0.1% per year.

3.10 Safety devices

3.10.1 Frost protection function

The frost protection function for the system is controlled using the product itself or using the optional system control. If the system control fails, the product guarantees limited frost protection for the heating circuit.

3.10.2 Low-water pressure protection

This function continuously monitors the pressure of the heating water in order to prevent a possible loss of heating water.

3.10.3 Freeze protection

This function prevents the outdoor unit's evaporator from freezing when the heat source temperature drops below a certain value.

The outlet temperature of the heat source is constantly measured. If the outlet temperature of the heat source falls below a certain value, the compressor temporarily switches off and displays a status message. If this fault occurs three times in a row, it is switched off and a fault message is displayed.

3.10.4 Pump blocking protection

This function prevents the pumps for heating water from sticking. The pumps, which were out of operation for 23 hours, are switched on for 10–20 seconds, one after the other.

3.10.5 Hot gas thermostat in the refrigerant circuit

The hot gas thermostat shuts down the heat pump if the temperature in the refrigerant circuit is too high. Following a waiting period, the heat pump attempts to start once more. After three failed start attempts in succession, a fault message is displayed.

– Max. refrigerant circuit temperature: 135 ℃

– Waiting period: 5 minutes (after the first occurrence) – Waiting period: 30 minutes

(after the second and every further occurrence)

The fault counter is reset if both of the following conditions are met:

– Heat requirement without switching off prematurely

– 60 minutes of uninterrupted operation

3.10.6 Safety cut-out (SCO) in the heating circuit

If the temperature in the heating circuit of the internal electric back-up heater exceeds the maximum temperature, the safety cut-out shuts down the electric back-up heater as a securing measure. After it is triggered, the safety cut-out must be replaced.

– Max. heating circuit temperature: 95 ℃

4 Operation

4.1 Basic display

120

kWh/d

The displays shows the basic display with the current status of the product. The daily energy yield (1) is displayed in the centre of the display.

If you press a selection button, the activated function is displayed in the display.

As soon as a fault message is present, the basic displays switches to the fault message.

4.2 Operating concept

The product has two operating levels.

The operating level for the end user shows the most important information and offers setting options which do not require any special prior knowledge.

The operating level for the competent person is reserved for the competent person and is protected by a code.

You can find further information in the operating instructions for the indoor unit.

4.3 Menu display

Xxxx Xxxxxxxxxxx

Xxxx Xxxxxxx

Xxxxxxxxxx

xxxxxx Xxxxxxx

1 Scroll bar

2 Current assignment of

the selection buttons

3 Selection level list

entries

4 Selection level

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Operation 4

0020257319_02 Hydraulic station Operating instructions 7

Note

Path details at the start of a section specify how to access this function, e.g. Menu ¬ Information ¬

Contact data.

4.4 Starting up the product

4.4.1 Opening the isolator devices

1. Ask the competent person who installed the product to explain to you where these isolator devices are located and how to handle them.

2. If installed, open the service valves in the heating installation's flow and return.

3. Open the cold-water isolation valve.

4.4.2 Switching on the product

Note

The product does not have an on/off switch. The product is switched on and ready for operation as soon as it is connected to the power grid.

1. Ensure that the product casing is properly installed.

2. Use the partition that is installed on-site (e.g. fuses or power switches) to switch on the product.

◁ The "basic display" appears in the product's operat-

ing display.

◁ The basic display appears on the system control

display.

4.4.3 Adjusting the target cylinder temperature

Danger! Risk of death from legionella.

Legionella multiply at temperatures below 60 °C.

▶ Have a competent person inform you

about the measures that should be taken to protect against Legionella in your installation.

▶ Do not set any water temperatures below

60 °C without consulting the competent person first.

Danger! Risk of death from legionella!

If you decrease the cylinder temperature, the risk of legionella spreading increases.

▶ Activate the anti-legionella times in the

system control and set them.

In order to achieve energy-efficient domestic hot water generation predominantly from the energy extracted from the environment, the factory setting for the desired domestic hot water temperature must be adjusted on the system control.

▶ To do this, adjust the target cylinder temperature (De-

sired DHW circuit temperature) to between 50 and

55 °C.

◁ Depending on the source of energy obtained from the

environment, domestic hot water outlet temperatures of between 50 and 55 °C are reached.

4.4.4 Yield indicator

You can use this function to display the environmental energy yield as a cumulative value for a period of a day, a month and the total for the heating, domestic hot water generation and cooling modes.

You can displays the working figure for a period of a month and the total for the heating and domestic hot water generation modes. The working figure is the ratio of thermal energy generated to the operating current used. Monthly values may vary considerably since, for example, in the summer only domestic hot water generation is used. A large number of factors influence this estimate, e.g. the type of heating installation (direct heating mode = low flow temperature or indirect heating mode via buffer cylinder = high flow temperature). This figure may therefore deviate by up to 20%.

The working figures only record the power consumption of internal components, not of external components such as external heating circuit pumps, valves, etc.

4.4.5 Displaying the Live Monitor

Menu → Live Monitor

You can use the Live Monitor to view the current status of the product.

4.4.6 Displaying the building circuit pressure

Menu → Live Monitor→ Building circuit pressure

You can use this function to display the current filling pressure in the heating installation.

4.4.7 Reading the operating statistics

Menu → Information → Heating op. hours

Menu → Information → DHW operating hours

Menu → Information → Cooling op. hours

Menu → Information → Total operating hours

You can use this function to display the operating hours for heating mode, for domestic hot water mode, for cooling mode and for overall operation.

4.4.8 Setting the language

1. Select OK twice to confirm the set language.

2. If you want to set another language, press and hold and at the same time.

3. Also press the reset button for a short time.

4. Press and hold

and until the display shows the

language setting.

5. Select the required language by pressing

or .

6. Press (OK) to confirm your selection.

7. Once you have set the correct language, press (OK)

again to confirm this.

4.4.9 Set display contrast

Menu → Basic settings → Display contrast

▶ You can set the contrast here.

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5 Care and maintenance

8 Operating instructions Hydraulic station 0020257319_02

4.4.10 Serial number and article number

Menu → Information → Serial number

The product's serial number is displayed.

The article number is found in the second line of the serial number.

4.4.11 Contact details for the competent person

Menu → Information → Contact data Phone number

If the competent person has entered their telephone number during the installation, you can read it here.

4.5 Checking the filling pressure in the heat pump circuit

Note

To avoid operating the installation with insufficient water volume and to prevent possible damage associated with this, the product is fitted with a pressure sensor and a digital pressure display.

To ensure that the heating installation operates properly, the filling pressure must be between 0.1 MPa and 0.15 MPa (1.0 bar and 1.5 bar) when the heating installation condition is cold.

If the heating installation extends over several storeys, a higher filling pressure may be required for the heating installation. Ask a competent person for details.

Note

If the pressure falls below 0.07 MPa (0.7 bar), message M32 appears.

If the pressure rises above 0.07 MPa (0.7 bar), message M32 goes out.

In addition, the symbol is displayed after approx. one minute.

If the filling pressure of the heating installation falls below 0.05 MPa (0.5 bar) for longer than one minute, fault message F.22 and the current filling pressure appear alternately in the display.

If the blocking time has elapsed or if the filling pressure of the heating installation rises above

0.05 MPa (0.5 bar), fault message F.22 goes out.

1. Use Menu Live Monitor Water pressure to display the

filling pressure in the heat pump circuit.

2. If the pressure drops frequently, identify and eliminate

the reason for the pressure loss of heating water. Inform a competent person of this.

4.6 Setting the heating flow temperature

▶ See the table in the appendix.

Overview of the end user operating level

4.7 Setting the domestic hot water temperature

▶ See the table in the appendix.

Overview of the end user operating level

4.8 Switching off the product's functions

4.8.1 Frost protection function

Caution. Risk of material damage due to frost.

The frost protection function cannot guarantee circulation through the entire heating installation. Under certain circumstances, there is therefore a risk of frost to certain parts of the heating installation, which may cause damage.

▶ During a period of frost, ensure that the

heating installation remains in operation and that all rooms are sufficiently heated, even when you are away.

To ensure that the frost protection devices are permanently ready for operation, you must leave the system switched on.

Another way to protect the heating installation and the product from frost for very long switch-off periods is to drain them completely.

▶ Consult a competent person about this.

4.8.2 Switching off heating mode (Summer mode)

▶ Observe the instructions for the system control.

4.8.3 Switching off domestic hot water generation

▶ Observe the instructions for the system control.

5 Care and maintenance

5.1 Caring for the product

▶ Clean the casing with a damp cloth and a little solvent-

free soap.

▶ Do not use sprays, scouring agents, detergents, solvents

or cleaning agents that contain chlorine.

Page 11

Troubleshooting 6

0020257319_02 Hydraulic station Operating instructions 9

5.2 Maintenance

Applicability: Except Great Britain

An annual inspection and biennial maintenance of the product carried out by a competent person is a prerequisite for ensuring that the product is permanently ready and safe for operation, reliable, and has a long service life. The inspection may require maintenance to be carried out earlier, depending on the results.

Applicability: Great Britain

An annual inspection of the product carried out by a competent person is a prerequisite for ensuring that the product is permanently ready and safe for operation, reliable, and has a long working life.

5.3 Reading maintenance messages

If the

symbol is shown in the display, the product requires maintenance work or the product is in restricted mode (comfort protection). The product is not in fault mode; it continues to operate.

▶ Consult a competent person.

Condition: Lhm. 37 is displayed

The product is in Comfort protection mode. The product has detected a permanent fault and continues to run with restricted comfort.

5.4 Checking the system pressure

1. Check the filling pressure of the heating installation

every day for a week after initial start-up and maintenance work, and then twice a year.

– Min. heating circuit operating pressure: ≥ 0.07 MPa

(≥ 0.70 bar)

2. If the filling pressure is too low, inform your competent

person so that they can refill the heating water.

6 Troubleshooting

6.1 Reading fault messages

Fault messages have priority over all other displays and are shown on the display instead of the basic display. If several faults occur at the same time, these are displayed alternately for two seconds each.

Depending on the type of fault, the system can work in limp home mode in order to maintain the heating mode or domestic hot water generation.

F.723 Building circuit: Pressure too low

If the filling pressure falls below the minimum pressure, the heat pump will be switched off automatically.

▶ Inform your competent person so that he can top up the

heating water.

F.1120 Heating rod: Phase failure

If the electric back-up heater is defective, the anti-legionella function is not guaranteed.

▶ Inform your competent person so that they can rectify the

fault and reset the internal circuit breaker.

6.2 Detecting and eliminating faults

▶ If problems occur whilst operating the product, you can

carry out certain checks with the aid of the table. Troubleshooting (→ Page 11)

▶ If the product is not functioning correctly, even though

you have checked the points listed in the table, contact a competent person.

7 Decommissioning

7.1 Temporarily decommissioning the product

▶ Use the partition that is installed on-site (e.g. fuses

or power switches) to disconnect the product from the power supply.

7.2 Permanently decommissioning the product

▶ Have a competent person permanently decommission

and dispose of the product.

8 Recycling and disposal

▶ The competent person who installed your product is re-

sponsible for the disposal of the packaging.

If the product is labelled with this mark:

▶ In this case, do not dispose of the product with the

household waste.

▶ Instead, hand in the product to a collection centre for

waste electrical or electronic equipment.

If the product contains batteries that are labelled with this mark, these batteries may contain substances that are hazardous to human health and the environment.

▶ In this case, dispose of the batteries at a collection point

for batteries.

8.1 Disposing of the product and the

accessories

Do not dispose of the product or the accessories with household waste.

▶ Ensure that the product and all accessories are disposed

of properly.

▶ Observe all valid regulations.

Page 12

9 Guarantee and customer service

10 Operating instructions Hydraulic station 0020257319_02

8.2 Arranging disposal of refrigerant

The product is filled with R410A refrigerant which must not be released into the atmosphere.

▶ Refrigerant must only be disposed of by a qualified com-

petent person.

9 Guarantee and customer service

9.1 Guarantee

Applicability: Great Britain

Vaillant provides a full parts and labour guarantee for this appliance for the duration as shown on the enclosed registration card which must be fully completed and returned within 30 days of installation. All appliances must be installed by a suitably competent person fully conversant and in accordance with all current regulations applicable to the appliance type installation. In the case of gas appliances the Gas Safety (Installation and Use) Regulations 1998, and the manufacturer’s instructions. In the UK competent persons approved at the time by the Health and Safety Executive undertake the work in compliance with safe and satisfactory standards. Installers should also be fully conversant with and competent with all necessary electrical and building regulations that may apply to the installation.

In addition all unvented domestic hot water cylinders must be installed by a competent person to the prevailing building regulations at the time of installation (G3). All appliances shall be fully commissioned in accordance with our installation manual and Benchmark commissioning check list (this will be included within the installation manual). These must be signed and given to the user for safe keeping during the hand over process. Installers should also at this time advise the user of the annual servicing requirements and advise of appropriate service agreement.

Terms and conditions do apply to the guarantee, details of which can be found on the registration card included with this appliance. In order to qualify for guarantee after one year the appliance must be serviced in accordance with our installation manual servicing instructions. The benchmark service history should be completed. Note - all costs associated with this service are excluded from this guarantee.

Failure to install and commission this appliance in compliance with the manufacturer’s instructions will invalidate the guarantee (this does not affect the customer’s statutory rights).

Page 13

Appendix

0020257319_02 Hydraulic station Operating instructions 11

Appendix

A Troubleshooting

Problem Possible cause Remedy

No domestic hot water, heating remains cold; product does not start up

Building power supply switched off Switch on building power supply

Domestic hot water or heating set to "off"/domestic hot water temperature or target temperature set too low

Ensure that domestic hot water mode and/or heating mode is activated in the system control.

Set the domestic hot water temperature in the system control to the required value.

Air in the heating installation Purging the radiators

If the problem occurs again: Inform the competent person

Domestic hot water mode without any problems; heating does not start

No heat requirement via the control Check the timer programme on the control and

correct if necessary

Check the room temperature and, if required, correct the target room temperature (→ Control operating instructions)

B Overview of the end user operating level

Setting level Values Unit Increment, select Default setting Setting

Min. Max.

Basic display → Right-hand selection button

Room temperature setpoint * Current value ℃

Manual cooling demand*

Basic display → Left-hand selection button

Domestic hot water cylinder target temperature*

Current value ℃

Domestic hot water cylinder actual temperature

Current value ℃

Yield indicator →

Energy yield: Day, Heating Cumulative value kWh

Energy yield: Day, Domestic hot water

Cumulative value kWh

Energy yield: Day, Cooling Cumulative value kWh

Energy yield: Month, Heating Cumulative value kWh

Working figure: Month, Heating Cumulative value

Energy yield: Total, Heating Cumulative value kWh

Working figure: Total, Heating Cumulative value

Energy yield: Month, Cooling Cumulative value kWh

Working figure: Month, Cooling Cumulative value

Energy yield: Total, Cooling Cumulative value kWh

Working figure: Total, Cooling Cumulative value

Energy yield: Month, Domestic hot water

Cumulative value kWh

Working figure: Month, Domestic hot water

Cumulative value

Energy yield: Total, Domestic hot water

Cumulative value kWh

Working figure: Total, Domestic hot water

Cumulative value

Total energy consumption Cumulative value kWh

Live Monitor →

Current status message(s) Current value

*If no system control is installed, the menu item is displayed in the product's control panel.

Page 14

Appendix

12 Operating instructions Hydraulic station 0020257319_02

Setting level Values Unit Increment, select Default setting Setting

Min. Max.

Building circuit pressure Current value bar

Heating circuit flow rate Current value l/h

Switch-on delay Outdoor unit Current value min

Switch-on delay Indoor unit Current value min

Flow temp. setpoint Current value ℃

Current flow temp. Current value ℃

Energy integral Current value °min

Cooling capacity Current value kW

Electrical power consumption Current value kW Total power consump-

tion of the heat pump without any external components connected (as supplied).

Compressor modulation Current value

Air inlet temperature Current value ℃

Immersion heater power Current value kW

External current anode status Current value

Outdoor temperature Current value ℃

Information →

Contact data Phone number

Serial number Permanent value

Operating hours total Cumulative value h

Hours heating Cumulative value h

DHW operating hours Cumulative value h

Cooling op. hours Cumulative value h

Basic settings →

Language Current language Languages available for

selection

02 English

Display contrast Current value 1 25

15 40

Resets →

No entries available

*If no system control is installed, the menu item is displayed in the product's control panel.

Page 15

Index

0020257319_02 Hydraulic station Operating instructions 13

Index

Article number .......................................................................8

Battery ...................................................................................9

Brine fluid .............................................................................. 3

Building circuit pressure ........................................................ 7

CE marking............................................................................ 6

Comfort protection mode ....................................................... 9

Competent person contact details......................................... 8

Control................................................................................... 8

Cylinder charging .................................................................. 8

Decommissioning..................................................................9

Display............................................................................... 4–5

Disposal.................................................................................9

Documents ............................................................................ 4

Domestic hot water generation

Deactivate........................................................................ 8

Domestic hot water temperature

Setting..............................................................................8

Environmental energy yield ................................................... 7

Fault message .......................................................................9

Filling pressure in the heat pump circuit................................ 8

Filling pressure of the heating installation ............................. 9

Freeze protection .................................................................. 6

Frost ...................................................................................... 3

Frost protection function .................................................... 6, 8

Heating flow temperature .................................................... 8

Setting (without a control)................................................8

Heating installation

Draining ...........................................................................8

Heating mode (combination product)

Deactivate........................................................................ 8

Hot gas thermostat ................................................................6

Intended use.......................................................................... 2

Language ..............................................................................7

Maintenance...................................................................... 3, 9

Maintenance message .......................................................... 9

Menu .....................................................................................6

Operating concept ................................................................. 6

Operator control elements ................................................. 4–5

Pressure in the heat pump circuit .......................................... 8

Product

Disposing......................................................................... 9

Switching on .................................................................... 7

Pump blocking protection ...................................................... 6

Recycling............................................................................... 9

Repair.................................................................................... 3

Restricted mode ....................................................................9

Safety cut-out ........................................................................6

Serial number .................................................................... 4, 8

Setting the display contrast ................................................... 7

Summer mode .......................................................................8

System pressure ................................................................... 9

Troubleshooting.....................................................................9

Page 16

Contents

14 Installation and maintenance instructions Hydraulic station 0020257319_02

Installation and maintenance instructions

Contents

1 Safety .................................................................. 16

1.1 Action-related warnings ....................................... 16

1.2 Intended use ........................................................ 16

1.3 General safety information .................................. 16

1.4 Regulations (directives, laws, standards)............ 18

1.5 Benchmark........................................................... 18

2 Notes on the documentation ............................ 19

2.1 Observing other applicable documents ............... 19

2.2 Storing documents............................................... 19

2.3 Validity of the instructions.................................... 19

2.4 Further information .............................................. 19

3 Product description........................................... 19

3.1 Heat pump system ............................................... 19

3.2 Safety devices ..................................................... 19

3.3 Cooling mode....................................................... 20

3.4 Functions of the heat pump ................................. 20

3.5 Description of the product.................................... 20

3.6 Product overview ................................................. 20

3.7 Service valve ....................................................... 21

3.8 Information on the data plate ............................... 21

3.9 Connection symbols ............................................ 22

3.10 CE marking .......................................................... 22

3.11 Application limits .................................................. 22

3.12 Buffer cylinder...................................................... 23

4 Set-up.................................................................. 23

4.1 Unpacking the product......................................... 23

4.2 Checking the scope of delivery............................ 23

4.3 Selecting the installation site ............................... 23

4.4 Dimensions.......................................................... 24

4.5 Minimum clearances and installation

clearances ........................................................... 24

4.6 Wall-mounting the product................................... 24

4.7 Removing the front casing................................... 25

4.8 Removing the bottom casing ............................... 25

5 Hydraulics installation ...................................... 26

5.1 Carrying out the installation preparations ............ 26

5.2 Routing refrigerant pipes ..................................... 26

5.3 Connecting the refrigerant pipes ......................... 26

5.4 Checking the refrigerant pipes for tightness ........ 27

5.5 Installing the heating flow and heating return

for the domestic hot water cylinder ...................... 27

5.6 Installing the heating circuit connections ............. 27

5.7 Installing a drain on the expansion relief valve .... 27

6 Electrical installation......................................... 27

6.1 Preparing the electrical installation...................... 27

6.2 Opening the power supply PCB's electronics

box ....................................................................... 28

6.3 Establishing the power supply ............................. 28

6.4 Installing components for the energy supply

company lockout function .................................... 30

6.5 Limiting the power consumption .......................... 30

6.6 Menu functions without the optional system

control .................................................................. 30

6.7 Installing the system control in the electronics

box ....................................................................... 31

6.8 Opening the electronics box ................................ 31

6.9 Cable route .......................................................... 31

6.10 Connecting a limit thermostat for the

underfloor heating................................................ 31

6.11 Carrying out the wiring......................................... 32

6.12 Connecting the circulation pump ......................... 32

6.13 Actuating a circulation pump with an eBUS

controller.............................................................. 32

6.14 Connecting the domestic hot water cylinder ........ 33

6.15 Connecting the external prioritising diverter

valve (optional) .................................................... 33

6.16 Using the additional relays .................................. 33

6.17 Connecting cascades .......................................... 33

6.18 Sealing the power supply PCB ............................ 33

6.19 Checking the electrical installation ...................... 33

7 Start-up ............................................................... 33

7.1 Activating screed drying without the outdoor

unit and system control........................................ 33

7.2 Setting the prioritising diverter valve.................... 34

7.3 Checking and treating the heating water/filling

and supplementary water .................................... 34

7.4 Filling and purging the heating installation .......... 35

7.5 Purging ................................................................ 36

7.6 Starting up the product ........................................ 36

7.7 Running the installation assistants ...................... 36

7.8 Energy balance control ........................................ 36

7.9 Compressor hysteresis ........................................ 37

7.10 Enabling the electric back-up heater ................... 37

7.11 Setting the anti-legionella function....................... 37

7.12 Purging ................................................................ 37

7.13 Calling up the installer level ................................. 37

7.14 Restarting the installation assistants ................... 37

7.15 Calling up statistics .............................................. 37

7.16 Using check programmes .................................... 37

7.17 Carrying out the actuator test .............................. 37

7.18 Starting up the optional system control ............... 37

7.19 Display of the filling pressure in the heat pump

circuit ................................................................... 38

7.20 Preventing low water pressure in the heating

circuit ................................................................... 38

7.21 Checking function and leak-tightness.................. 38

8 Operation............................................................ 38

8.1 Operating concept of the product ........................ 38

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Contents

0020257319_02 Hydraulic station Installation and maintenance instructions 15

9 Adapting the unit to the heating

installation.......................................................... 38

9.1 Configuring the heating installation ..................... 38

9.2 Remaining feed head of the product ................... 38

9.3 Setting the flow temperature in heating mode

(with no control connected) ................................. 39

9.4 Instructing the end user ....................................... 39

10 Troubleshooting ................................................ 39

10.1 Contacting your service partner........................... 39

10.2 Displaying the Live Monitor (current product

status) .................................................................. 39

10.3 Checking fault codes ........................................... 39

10.4 Querying the fault memory .................................. 39

10.5 Resetting the fault memory.................................. 39

10.6 Using check programmes .................................... 39

10.7 Resetting parameters to factory settings ............. 39

10.8 Safety cut-out....................................................... 39

10.9 Preparing the repair work .................................... 40

11 Inspection and maintenance ............................ 40

11.1 Inspection and maintenance information............. 40

11.2 Procuring spare parts .......................................... 40

11.3 Checking maintenance messages....................... 40

11.4 Observing inspection and maintenance

intervals ............................................................... 41

11.5 Preparing for inspection and maintenance .......... 41

11.6 Checking the admission pressure of the

expansion vessel ................................................. 41

11.7 Checking and correcting the filling pressure of

the heating installation ......................................... 41

11.8 Checking the high-pressure switch-off ................ 41

11.9 Completing inspection and maintenance............. 41

12 Draining .............................................................. 41

12.1 Draining the product's heating circuit................... 41

12.2 Draining the heating installation .......................... 42

13 Decommissioning.............................................. 42

13.1 Temporarily decommissioning the product.......... 42

13.2 Permanently decommissioning the product......... 42

14 Recycling and disposal..................................... 42

14.1 Recycling and disposal ........................................ 42

14.2 Disposing of the product and accessories ........... 42

14.3 Disposing of the refrigerant ................................. 42

Appendix ............................................................................43

A Wiring diagram................................................... 43

B Control PCB ....................................................... 44

C Basic connection diagram for the energy

supply company lockout, shutdown via

connection S21 .................................................. 45

D Basic connection diagram for the energy

supply company lockout, shutdown via

partition .............................................................. 46

E Installer level overview...................................... 47

F Status codes ...................................................... 50

G Maintenance messages .................................... 52

H Comfort protection mode.................................. 53

I Fault codes......................................................... 53

J 5.4 kW back-up heater....................................... 57

K 8.54 kW back-up heater at 230 V ...................... 57

L 8.54 kW back-up heater at 400 V ...................... 58

M Inspection and maintenance work................... 58

N Characteristic values for the temperature

sensor, refrigeration circuit .............................. 58

O Characteristic values for the internal

temperature sensors, hydraulic circuit ........... 59

P Characteristic values for the VR10

internal temperature sensors, cylinder

temperature........................................................ 60

Q Characteristic values for the VRC DCF

outdoor temperature sensor............................. 61

R Technical data.................................................... 61

S Commissioning Checklist ................................. 65

Index ...................................................................................68

Page 18

1 Safety

16 Installation and maintenance instructions Hydraulic station 0020257319_02

1 Safety

1.1 Action-related warnings

Classification of action-related warnings

The action-related warnings are classified in accordance with the severity of the possible danger using the following warning signs and signal words:

Warning symbols and signal words

Danger!

Imminent danger to life or risk of severe personal injury

Danger!

Risk of death from electric shock

Warning.

Risk of minor personal injury

Caution.

Risk of material or environmental damage

1.2 Intended use

There is a risk of injury or death to the user or others, or of damage to the product and other property in the event of improper use or use for which it is not intended.

The product is the indoor unit of an air-towater heat pump with split technology.

The product is intended exclusively for domestic use.

The intended use only allows for these product combinations:

Outdoor unit Indoor unit

VWL ..5/5 AS ... VWL ..8/5 IS ...

VWL ..7/5 IS ...

Intended use includes the following:

– observance of accompanying operating,

installation and maintenance instructions for the product and any other system components

– installing and setting up the product in ac-

cordance with the product and system approval

– compliance with all inspection and main-

tenance conditions listed in the instructions.

Intended use also covers installation in accordance with the IP code.

Caution.

Improper use of any kind is prohibited.

1.3 General safety information

1.3.1 Risk caused by inadequate qualifications

The following work must only be carried out by competent persons who are sufficiently qualified to do so:

– Set-up – Dismantling – Installation – Start-up – Inspection and maintenance – Repair – Decommissioning

▶ Proceed in accordance with current tech-

nology.

1.3.2 Risk of injury due to the heavy weight of the product

▶ Make sure that the product is transported

by at least two people.

1.3.3 Risk of death due to lack of safety devices

The basic diagrams included in this document do not show all safety devices required for correct installation.

▶

Install the necessary safety devices in the installation.

▶ Observe the applicable national and inter-

national laws, standards and directives.

1.3.4 Risk of death from electric shock

There is a risk of death from electric shock if you touch live components.

Before commencing work on the product:

▶ Disconnect the product from the power

supply by switching off all power supplies at all poles (electrical partition with a con-

Page 19

Safety 1

0020257319_02 Hydraulic station Installation and maintenance instructions 17

tact gap of at least 3 mm, e.g. fuse or circuit breaker).

▶ Secure against being switched back on

again.

▶ Wait for at least 3 minutes until the capa-

citors have discharged.

▶ Check that there is no voltage.

1.3.5 Risk of material damage due to an unsuitable installation surface

An uneven installation surface may cause leaks in the product.

▶ Make sure that the product is positioned

flush against the installation surface.

▶ Ensure that the installation surface has

sufficient load-bearing capacity to bear the operating weight of the product.

1.3.6 Risk of material damage due to malfunctioning

Not rectifying faults, changing the safety devices and failing to carry out maintenance can cause malfunctioning and pose safety risks during operation.

▶ Ensure that the heating installation is in a

technically perfect condition.

▶ Ensure that no safety or monitoring

devices have been removed, bridged or disabled.

▶ Immediately eliminate any faults and dam-

age that may affect safety.

1.3.7 Preventing the risk of injury from freezing as a result of touching refrigerant

The refrigeration circuit for the indoor unit is delivered with an operational filling of nitrogen in order to guarantee a check for tightness. The outdoor unit is delivered with an operational filling of R410A refrigerant. Escaping refrigerant may cause freezing if the exit point is touched.

▶ If refrigerant escapes, do not touch any

components of the product.

▶ Do not inhale any steam or gases that

escape from the refrigerant circuit as a result of leaks.

▶ Avoid skin or eye contact with the refriger-

ant.

▶ In the event of skin or eye contact with the

refrigerant, seek medical advice.

1.3.8 Risk of material damage caused by condensate inside the house

In heating mode, the lines between the heat pump and the heat source (environment circuit) are cold, which means that condensate may form on the lines in the house. In cooling mode, the lines in the building circuit are so cold that condensate may form if the temperature falls below the dew point. Condensate may lead to material damage, for example due to corrosion.

▶ Ensure that you do not damage the heat

insulation on the lines.

1.3.9 Risk of burns, scalds and frostbite due to hot and cold components

There is a risk of burns and frostbite from some components, particularly uninsulated pipelines.

▶ Only carry out work on the components

once they have reached environmental temperature.

1.3.10 Risk of being scalded by hot drinking

water

There is a risk of scalding at the hot water draw-off points if the hot water temperatures are greater than 50 °C. Young children and elderly persons are particularly at risk, even at lower temperatures.

▶ Select the temperature so that nobody is at

risk.

1.3.11 Risk of material damage due to

additional elements in the heating water

Unsuitable frost and corrosion protection agents may damage seals and other components of the heating circuit and may therefore also lead to leaks in the water outlet.

▶ Only add approved frost and corrosion

protection agents to the heating water.

1.3.12 Risk of material damage caused by

frost

▶ Do not install the product in rooms prone

to frost.

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1 Safety

18 Installation and maintenance instructions Hydraulic station 0020257319_02

1.3.13 Risk of material damage caused by using an unsuitable tool

▶ Use the correct tool.

1.3.14 Risk of environmental damage caused by refrigerant

The product contains a refrigerant with considerable GWP (GWP = Global Warming Potential).

▶ Ensure that the refrigerant does not es-

cape into the atmosphere.

▶ If you are a competent person who is qual-

ified to work with refrigerants, you must wear appropriate protective equipment when servicing the product, and access the refrigerant circuit, if required. Recycle or dispose of the product in accordance with the applicable regulations.

1.4 Regulations (directives, laws,

standards)

▶ Observe the national regulations, stand-

ards, directives, ordinances and laws.

1.5 Benchmark

Applicability: Great Britain

Vaillant is a licensed member of the Benchmark Scheme.

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer’s instructions by a competent person approved at the time by the Health and Safety Executive and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future reference.

Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme.

Benchmark is managed and promoted by the Heating and Hotwater Industry Council.

For more information visit www.centralheating.co.uk

Page 21

Notes on the documentation 2

0020257319_02 Hydraulic station Installation and maintenance instructions 19

2 Notes on the documentation

2.1 Observing other applicable documents

▶ Always observe all the operating and installation instruc-

tions included with the system components.

2.2 Storing documents

▶ Pass these instructions and all other applicable docu-

ments on to the end user.

2.3 Validity of the instructions

These instructions apply only to:

Product Outdoor unit

VWL 57/5 IS VWL 35/5 AS

VWL 55/5 AS

VWL 77/5 IS VWL 75/5 AS

VWL 127/5 IS VWL 105/5 AS

VWL 125/5 AS

2.4 Further information

▶ Scan the displayed code using your smartphone in order

to view further information about the installation.

◁ You are guided to installation videos.

3 Product description

3.1 Heat pump system

Design of a typical heat pump system with split technology:

1 2

1 Heat pump, outdoor unit

2 eBUS line

3 System control (op-

tional)

4 Control for the indoor

unit

5 Heat pump, indoor unit

6 Refrigerant circuit

3.2 Safety devices

3.2.1 Frost protection function

3.2.2 Low-water pressure protection

This function continuously monitors the pressure of the heating water in order to prevent a possible loss of heating water. If the water pressure falls below the minimum pressure, an analogue pressure sensor switches off the product and switches the other modules, where these exist, to standby mode. The pressure sensor switches the product on again if the water pressure reaches the operating pressure.

If the pressure in the heating circuit is ≤0.1 MPa (1 bar), a maintenance message appears below the minimum operating pressure.

– Min. heating circuit pressure: ≥ 0.05 MPa (≥ 0.50 bar) – Min. heating circuit operating pressure: ≥ 0.07 MPa

(≥ 0.70 bar)

3.2.3 Freeze protection

This function prevents the outdoor unit's evaporator from freezing when the heat source temperature drops below a certain value.

3.2.4 Pump blocking protection

This function prevents the pumps for heating water from sticking. The pumps, which were out of operation for

Page 22

3 Product description

20 Installation and maintenance instructions Hydraulic station 0020257319_02

23 hours, are switched on for 10–20 seconds, one after the other.

3.2.5 Safety cut-out (SCO) in the heating circuit

– Max. heating circuit temperature: 95 ℃

3.3 Cooling mode

Depending on the country, the product has the heating mode or heating and cooling mode function.

An optional accessory can be used to subsequently activate the cooling mode.

3.4 Functions of the heat pump

The heat pump has a closed refrigerant circuit in which refrigerant circulates.

In heating mode, cyclic evaporation, compression, liquefaction and expansion take in heat energy from the surroundings and transfer it to the building. In cooling mode, heat energy is extracted from the building and released into the environment.

3.4.1 Operating principle, heating mode

1 Evaporator (heat ex-

changer)

2 4-port diverter valve

3 Fan

4 Compressor

5 Expansion valve

6 Condenser (heat ex-

changer)

3.4.2 Operating principle, cooling mode

Applicability: Product with cooling mode

1 Condenser (heat ex-

changer)

2 4-port diverter valve

3 Fan

4 Compressor

5 Expansion valve

6 Evaporator (heat ex-

changer)

3.5 Description of the product

The product is the indoor unit of an air-to-water heat pump with split technology.

The indoor unit is connected to the outdoor unit via the refrigerant circuit.

3.6 Product overview

3.6.1 Product design

1 Unit mounting bracket 2 Expansion vessel

Page 23

Product description 3

0020257319_02 Hydraulic station Installation and maintenance instructions 21

3 Hydraulic block

4 Electronics box with

PCB

5 Indoor unit control

6 Electronics box (for

back-up immersion heater)

3.6.2 Design of the hydraulic block

4567

1 Condenser

2 Pressure sensor (heat-

ing circuit)

3 Expansion relief valve

4 Heating return

5 Heating flow

6 Domestic hot water

cylinder return

7 Domestic hot water

cylinder flow

8 Prioritising diverter

valve (heating circuit/cylinder charging)

9 Heating pump

10 Electric back-up heater

11 Service valve for filling

and creating a vacuum in the refrigerant circuit

12 Automatic air vent

3.6.3 Underside of the product

1 Drain for expansion

relief valve

2 Heating return

3 Heating flow

4 Domestic hot water

cylinder flow

5 Domestic hot water

cylinder return

6 Liquid pipe connection

7 Hot gas pipe connection

3.7 Service valve

At the service valve, you can test the vacuum, carry out pressure tests, and fill the refrigerant circuit.

3.8 Information on the data plate

The data plate is located on the rear of the electronics box.

Information Meaning

Serial no. Unique unit identification number

Nomenclature

VWL Vaillant, heat pump, air

5, 7, 12 Heating output in kW

7 Heating mode or cooling mode

/5 Unit generation

IS Indoor unit, split technology

230 V Electrical connection:

230 V: 1~/N/PE 230 V

400 V: 3~/N/PE 400 V

IP Protection class

Symbols

Compressor

Control

Refrigerant circuit

Heating circuit

Back-up heater

P max Rated power, maximum

I max Rated current, maximum

I In-rush current

Refrigerant circuit

MPa (bar) Permissible operating pressure (rel-

ative)

R410A Refrigerant, type

Page 24

3 Product description

22 Installation and maintenance instructions Hydraulic station 0020257319_02

Information Meaning

Refrigerant circuit

GWP Refrigerant, global warming poten-

tial

Heating circuit

MPa (bar) Permissible operating pressure

CE marking See section "CE marking"

3.9 Connection symbols

Symbol Connection

Heating circuit, flow

Heating circuit, return

Refrigerant circuit, hot gas pipe

Refrigerant circuit, liquid pipe

Domestic hot water cylinder, flow

Domestic hot water cylinder, return

3.10 CE marking

The CE marking shows that the products comply with the basic requirements of the applicable directives as stated on the data plate.

The declaration of conformity can be viewed at the manufacturer's site.

3.11 Application limits

The product works between a minimum and maximum outdoor temperature. These outdoor temperatures define the operating limits for the heating mode, domestic hot water mode and cooling mode. See Technical data (→ Page 61). Operating outside of the operating limits leads to the product switching off.

3.11.1 Heating mode

[-20;20]

[-20;43]

[20;55]

[-10;55]

[20;20]

-20 -15 -10 -5 0 5 10 15 20

A Outdoor temperature B Heating water temperat-

ure

3.11.2 DHW mode

[-20;43]

[35;62]

[-10;55]

[-20;5]

[2;62]

[20;5]

[43;55]

[43;10]

-20 -10 0 10 20 30 40 50

A Outdoor temperature B Domestic hot water

temperature

Page 25

Set-up 4

0020257319_02 Hydraulic station Installation and maintenance instructions 23

3.11.3 Cooling mode

Applicability: Product with cooling mode

[15;7]

[15;25]

[46;7]

[46;25]

0 1015202530354045

A Outdoor temperature B Heating water temperat-

ure

3.12 Buffer cylinder

Heating installations, which mainly consist of fan coils or radiators, usually contain a low volume of water. We recommend installing a buffer cylinder. In the case of two or more heating circuits in the system, a buffer cylinder or a low loss header should also be used as decoupling.

For the outdoor unit, it is important for the evaporator's deicing process that sufficient thermal energy can be provided.

Heat pump in the split system

Minimum installation volume For heating circuit with underfloor heating and fan coils

When the heating system is active in winter and the back-up heater is deactivated

When the heating system is active in winter and the back-up heater is active

3 kW and 5 kW output

40 l 15 l

7 kW output 55 l 20 l

10 kW and 12 kW output

150 l 45 l

Heat pump in the split system

Minimum installation volume For heating circuit with radiators

When the heating system is active in winter and the back-up heater is deactivated

When the heating system is active in winter and the back-up heater is active

3 kW and 5 kW output

100 l 20 l

7 kW output 130 l 30 l

10 kW and 12 kW output

250 l 50 l

4 Set-up

4.1 Unpacking the product

1. Remove the product from the packaging.

2. Remove the documentation.

3. Remove the protective film from all parts of the product.

4.2 Checking the scope of delivery

▶ Check that the scope of delivery is complete and intact.

Number Designation

Hydraulic station

Enclosed documentation

Bag with installation material

1 Selection lever for prioritising diverter valve

1 Filling device

1 5-pole 400 V connection cable

1 Adhesive strips for noise reduction

4.3 Selecting the installation site

▶ The installation site must be below 2000 metres above

sea level.

▶ Select a dry room that is frost-proof throughout and in

which the maximum installation height is not exceeded and the environmental temperature is neither above nor below the permitted range.

– Permissible environmental temperature: 7 … 25 ℃ – Permissible relative air humidity: 40 … 75 %

▶ Ensure that the installation room has the required min-

imum volume.

Heat pump R410A refri-

gerant filling volume

Minimum installation room volume

VWL 57/5 IS 1.5 kg 3.41 m³

VWL 77/5 IS 2.4 kg 5.45 m³

VWL 127/5 IS 3.6 kg 8.18 m³

Minimum installation room = refrigerant filling volume (kg)/practical limit value (kg/m³) (for R410A = 0.44 kg/m³)

▶ Ensure that the required minimum clearances can be

maintained.

▶ Observe the permissible height difference between out-

door unit and indoor unit. See the technical data in the appendix.

▶ When selecting the installation site, you must take into

consideration that when the heat pump is in operation, it will transfer vibrations to the walls.

▶ Ensure that the wall is even and offers sufficient load-

bearing capacity to bear the weight of the product.

▶ Ensure that pipes can be easily routed in an appropriate

way (domestic hot water side, heating side and refrigerant side).

▶ Do not install the product above another unit that may

damage it (e.g. above a cooker that produces water vapour and grease) or in a room with a high level of exposure to dust or in a corrosive environment.

▶ Do not install the product below a unit from which liquids

may flow.

Page 26

4 Set-up

24 Installation and maintenance instructions Hydraulic station 0020257319_02

4.4 Dimensions

440

220

184116 ,264,5

720

667

368136

87 101

350 2

143

207

4.5 Minimum clearances and installation clearances

A Min. 200 mm

B Min. 200 mm

C 1000 mm

D > 600 mm

▶ Provide sufficient clearance on both sides of the product

in order to facilitate access for maintenance and repair work.

▶ When using the accessories, observe the minimum clear-

ances/installation clearances.

▶ Ensure that no highly flammable parts come into contact

with the components as these may reach temperatures of over 80°C.

▶

Ensure that there is a minimum clearance between the highly flammable parts and the hot components.

– Minimum clearance: 200 mm

4.6 Wall-mounting the product

1. Cut the enclosed adhesive strips for noise reduction

into two equally sized pieces (3 cm x 3 cm).

2. Affix the adhesive strips to the product as shown in the

figure.

Page 27

Set-up 4

0020257319_02 Hydraulic station Installation and maintenance instructions 25

3. Check whether the wall has sufficient load-bearing capacity to bear the operating weight of the product.

4. Check if the supplied fixing material may be used for the wall.

Condition: The load-bearing capacity of the wall is sufficient, The fixing material is permitted for the wall

▶ Secure the unit mounting bracket to the wall as

described in the figure.

▶ Suspend the product on the unit mounting bracket from

above using the hanging bracket.

Condition: The load-bearing capacity of the wall is not sufficient

▶ Ensure that wall-mounting apparatus on-site has a suf-

ficient load-bearing capacity. Use individual stands or primary walling, for example.

▶ Do not wall-mount the product if you cannot provide

wall-mounting apparatus with a sufficient load-bearing capacity.

Condition: The fixing material is not permitted for the wall

▶ Wall-mount the product as described in the illustration

using the permitted fixing material provided on-site.

4.7 Removing the front casing

▶ Reinstall the components in the reverse order.

4.8 Removing the bottom casing

1. Hinge the electronics box forwards.

2. Open the electronics box and remove the top cover.

3. Remove the plug from the PCB.

4. Remove both screws as shown in the figure.

5. Pull out the electronics box towards the front.

6. Pull out the bottom casing towards the front.

7. Reinstall the components in the reverse order.

Page 28

5 Hydraulics installation

26 Installation and maintenance instructions Hydraulic station 0020257319_02

5 Hydraulics installation

Danger! Risk of scalding and/or risk of material

damage due to incorrect installation leading to escaping water.

Stresses in connection pipes can cause leaks.

▶ Install the connection pipes such that they

are free from mechanical stress.

Caution. Risk of material damage due to heat trans-

fer during soldering.

▶ Only solder connectors if the connectors

are not yet screwed to the service valves.

5.1 Carrying out the installation preparations

▶ Install the following components, preferably from the

manufacturer's accessories: – An expansion relief valve, a stopcock and a mano-

meter on the heating return

– A domestic hot water safety group and a stopcock on

the cold water supply

– A stopcock on the heating flow

▶ Check whether the volume of the installed expansion

vessel is sufficient for the heating system. If the volume of the installed expansion vessel is insufficient, install an additional expansion vessel, connected as close to the product as possible, in the heating return.

▶ Flush the heating installation through thoroughly before

connecting the product in order to remove any residue which could be deposited in the product and lead to damage.

▶ Check whether, when you open the catches on the refri-

gerant pipes, you can hear a hissing sound (caused by a factory-side excess pressure of nitrogen). If you do not find any excess pressure, check all of the screwed connections and pipes for leaks.

▶ For heating installations with solenoid valves or thermo-

statically controlled valves, install a bypass with bypass valve in order to guarantee a volume flow of at least 40%.

5.2 Routing refrigerant pipes

1. Observe the information on handling refrigerant pipes in the installation instructions for the outdoor unit.

2. Route the refrigerant pipes from the wall duct to the product.

3. Bend the pipes only once into their final position. Use a bending spring or another suitable bending tool to avoid kinks.

4. Secure the pipes to the wall using insulated wall brackets (cold insulation brackets).

5.3 Connecting the refrigerant pipes

Danger! Risk of injury and risk of environmental

damage due to escaping refrigerant.

Touching any escaping refrigerant may cause injury. Escaping refrigerant leads to environmental damage if it reaches the atmosphere.

▶ Only carry out work on the refrigerant cir-

cuit if you have been trained to do so.

1. Remove the flare nuts and the catches from the connections for the refrigerant pipes on the product.

◁ An audible hissing sound (escaping nitrogen) shows

that the refrigerant circuit in the product is leak-tight.

2. Apply a drop of flare oil to the outsides of the pipe ends in order to prevent the flare edge from breaking away when tightening screwed connections.

3. Connect the hot gas pipe (2). Use the product's flare nuts.

Caution. Risk of damage to the refrigerant pipes

caused by excessive tightening torque

▶ Note that the following torques only refer

to flanged connections. The torques for SAE connections are lower.

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Electrical installation 6

0020257319_02 Hydraulic station Installation and maintenance instructions 27

4. Tighten the flare nut.

Heating output

Pipe diameter Tightening torque

3 to 5 kW 1/2 " 50 … 60 Nm

7 to 12 kW 5/8 " 65 … 75 Nm

5. Connect the liquid pipe (1). Use the product's flare nuts.

6. Tighten the flare nut.

Heating output

Pipe diameter Tightening torque

3 to 5 kW 1/4 " 15 … 20 Nm

7 to 12 kW 3/8 " 35 … 45 Nm

5.4 Checking the refrigerant pipes for tightness

1. Check the refrigerant pipes for tightness (see the installation instructions for the outdoor unit).

2. Ensure that the heat insulation of the refrigerant pipes is still sufficient after installation.

5.5 Installing the heating flow and heating return

for the domestic hot water cylinder

▶ Install the heating return (1) and the heating flow (2) for

the domestic hot water cylinder in accordance with the relevant standards.

Connection symbols (→ Page 22)

5.6 Installing the heating circuit connections

1. Install the filling device on the product's heating return using the seal provided.

2. Install the return (1) and the flow (2) for the heating circuit in accordance with the relevant standards.

Connection symbols (→ Page 22)

5.7 Installing a drain on the expansion relief

valve

1. Install a drain hose (1) on the expansion relief valve.

2. Install the expansion relief valve hose in a frost-free environment and ensure that its routing ends in an open drain where it is then visible.

3. Ensure that escaping water does not endanger any people or electronic components.

6 Electrical installation

6.1 Preparing the electrical installation

Danger! Risk of death from electric shock as a res-

ult of an improper electrical connection!

An improper electrical connection may negatively affect the operational safety of the product and result in material damage or personal injury.

▶ Only carry out the electrical installation if

you are a trained competent person and are qualified for this work.

Page 30

6 Electrical installation

28 Installation and maintenance instructions Hydraulic station 0020257319_02

1. Observe the technical connection conditions for connecting to the energy supply company's low-voltage network.

2. Use the data plate to determine whether the product requires a 1~/230V or a 3~/400V electrical connection.

3. The product is preconfigured for the unblocked 1~/230V connection.

4. Determine whether the power supply for the product should be set up with a single-tariff meter or a dual-tariff meter.

5. Ensure that the nominal voltage of the single-phase network is 230 V (+10%/-15%) and the nominal voltage of the 3-phase network is 400 V (+10–15%).

6. Connect the product using a fixed connection and a partition with a contact gap of at least 3 mm (e.g. fuses or power switches).

7. Use the data plate to determine the product's rated current. Derive the suitable cable cross-sections for the electrical wires from this. The requirements for the cables can be found in from (→ Page 28) to (→ Page 29).

8. In each case, take into consideration the (on-site) installation conditions.

9. Ensure that the nominal voltage of the power grid corresponds to that of the product's main power supply cabling.

10. Make sure that access to the power supply is always

available and is not covered or blocked.

11. If the local power supply network operator requires that

the heat pump is controlled using a blocking signal, install a corresponding contact switch as prescribed by the power supply network operator.

6.2 Opening the power supply PCB's electronics

box

1. Remove the front casing. (→ Page 25)

2. Hinge the electronics box forwards.

3. Detach the four clips, on the left and the right, from the brackets.

6.3 Establishing the power supply

1. Remove the front casing. (→ Page 25)

2. Open the power supply PCB's electronics box.

(→ Page 28)

3. Guide the power supply cable (3) and other power supply cables (230 V) (4) through the central unit opening and into the product.

4. Guide the eBUS cable (1) and other low-voltage connection cables (24 V) (2) through the left-hand unit opening and into the product.

5. Guide the power supply cables through the strain relief (1) to the terminals on the power supply PCB.

6. Connect the power supply cable to the corresponding terminals.

7. Secure the power supply cable in the strain reliefs.

6.3.1 1~/230V single power supply

Caution. Risk of material damage due to high con-

nected voltage.

With excessive mains voltages, electronic components may be damaged.

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Electrical installation 6

0020257319_02 Hydraulic station Installation and maintenance instructions 29

▶ Ensure that the mains voltage is in the

permissible range.

12345

X300X310X311

1. Install a separate type B residual-current circuit breaker for the product.

2. Note the specifications on the sticker on the electronics box.

3. Use a 3-pole power supply cable with a conductor cross-section of 4 mm2and a temperature resistance of

90 °C.

4. Remove the cable jacket until there is only 30 mm left.

5. Connect the power supply cable to L1, N, PE, as shown.

6. Use the strain relief clamp to secure the cable in place.

7. Observe the instructions on connecting a dual-tariff supply; see (→ Page 30).

6.3.2 1~/230V dual power supply

Caution. Risk of material damage due to high con-

nected voltage.

With excessive mains voltages, electronic components may be damaged.

▶ Ensure that the mains voltage is in the

permissible range.

12345

X300X310X311

341

1. Install a separate type B residual-current circuit breaker for the product.

2. Note the specifications on the sticker on the electronics box.

3. Use a 3-pole power supply cable (low tariff) with a conductor cross-section of 4 mm2and a temperature resist-

ance of 90 °C. Use a 3-pole power supply cable (high tariff) with a conductor cross-section of 0.75 mm2and a

temperature resistance of 90 °C.

4. Remove the cable jacket until there is only 30 mm left.

5. Connect the power supply cable, as shown.

6. Use the strain relief clamp to secure the cable in place.

7. Observe the instructions on connecting a dual-tariff supply; see (→ Page 30).

6.3.3 3~/400V single power supply

Caution. Risk of material damage due to high con-

nected voltage.

With excessive mains voltages, electronic components may be damaged.

▶ Ensure that the mains voltage is in the

permissible range.

12345

L1L2L3

X300X310X311

1. Install a separate type B residual-current circuit breaker for the product.

2. Note the specifications on the sticker on the electronics box.

3. Use a 5-pole power supply cable with a conductor cross-section of 2.5 mm2and a temperature resistance

of 90 °C.

4. Remove the cable jacket until there is only 70 mm left.

5. Remove the jumper from between connections L1 and L2.

6. Connect the power supply cable to L1, L2, L3, N, PE, as shown.

7. Observe the instructions on connecting a dual-tariff supply; see (→ Page 30).

6.3.4 3~/400V dual power supply

Caution. Risk of material damage due to high con-

nected voltage.

With excessive mains voltages, electronic components may be damaged.

Page 32

6 Electrical installation

30 Installation and maintenance instructions Hydraulic station 0020257319_02

▶ Ensure that the mains voltage is in the

permissible range.

12345

X300X310X311

L1L2L3

1. Install a separate type B residual-current circuit breaker for the product.

2. Note the specifications on the sticker on the electronics box.

3. Use a 5-pole power supply cable (low tariff) with a conductor cross-section of 2.5 mm2and a temperature res-

istance of 90 °C. Use a 3-pole power supply cable (high tariff) with a conductor cross-section of 0.75 mm2and a

temperature resistance of 90 °C.

4. Remove the cable jacket until there is only 70 mm left for the 5-pole cable, and only 30 mm left for the 3-pole cable.

5. Remove the jumper from between connections L1 and L2.

6. Connect the power supply cable, as shown.

7. Observe the instructions on connecting a dual-tariff supply; see (→ Page 30).

6.4 Installing components for the energy supply

company lockout function

The heat generation of the heat pump can be switched off intermittently. It is switched off by the energy supply company and usually with a ripple control receiver.

Option 1: Actuating connection S21

▶ Connect a 2-pole control cable to the relay contact (po-

tential-free) for the ripple control receiver and to the connection S21, see appendix.

Note

In the event of control via connection S21, the energy supply does not have to be disconnected on-site.

▶ In the system control, set whether the back-up heater,

the compressor or both should be blocked.

▶ Set the parametrisation for connection S21 in the system

control.

Option 2: Disconnect the power supply with contactor

▶ Upstream of the indoor unit, install a contactor into the

power supply for the low tariff.

▶ Install a 2-pole control cable. Connect the control output

for the ripple control receiver to the control input for the contactor.

▶ Undo the lines to plug X311, which were installed at the

factory, and remove these along with plug X310.

▶ Connect an unblocked power supply to X311. ▶ Connect the power supply that is switched by the con-

tactor to X300, see appendix.

Note

When the energy supply (for the compressor or back-up heater) is switched off via the tariff contactor, S21 is not connected.

6.5 Limiting the power consumption

The electrical power for the back-up heater on the product and the compressor for the outdoor unit can be limited. You can set the maximum output in the product's display.

6.6 Menu functions without the optional system control

If no system control is installed and this has been confirmed in the installation assistant, the following additional functions are displayed in the indoor unit's control panel:

– End user level

– Room temperature setpoint – Screed drying activ. – Target cylinder temp. – Domestic hot water cylinder temp. – Manual cooling activation

– Installer level

– Heat curve – Summer sw.-off temp. – Heating biv. point – DHW bivalence point – Heating alt. point – Max. flow temperature – Min. flow temperature – Heating mode activ. – DHW activation – Cyl. charg. hysteresis – Limp home mode Immersion heater: Heating/DHW – Cooling target flow – Screed drying day

If the system control has been retroactively removed or a defect is present, you must restart the installation assistant and confirm the function without a system control in order to obtain the additional functions in the indoor unit's control panel.

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Electrical installation 6

0020257319_02 Hydraulic station Installation and maintenance instructions 31

6.7 Installing the system control in the electronics box

1. Remove the cover from the electronics box.

2. Connect the DIF cable – laid out ready – to the system

control or to the radio receiver.

3. If you are using a radio receiver, use the mobile base

station.

4. If you are using the wired system control, use the sys-

tem control.

5. Consult the instructions for the system control for in-

formation on coupling the mobile base station and the system control.

6.8 Opening the electronics box

1. Remove the front casing. (→ Page 25)

2. Hinge the electronics box

(1) forwards.

3. Detach the four clips (3), on the left and the right, from the brackets.

6.9 Cable route

24V / eBUS

▶ Route the 24 V cable and the eBUS cable through the

left-hand strain reliefs on the electronics box.

6.10 Connecting a limit thermostat for the

underfloor heating

Condition: If you are connecting a limit thermostat for underfloor heating:

230V

▶ Route the 230 V cable through the right-hand strain re-

liefs on the electronics box.

▶ Pull out the S20 plug for the bypass line at terminal

X100 on the control PCB.

▶ Connect the limit thermostat to plug S20.

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6 Electrical installation

32 Installation and maintenance instructions Hydraulic station 0020257319_02

6.11 Carrying out the wiring

Danger! Risk of death from electric shock!

Continuous voltage is present at power supply terminals L1, L2, L3 and N:

▶ Switch off the power supply. ▶ Check that there is no voltage. ▶ Secure the power supply against being

switched back on.

Danger! Risk of injury and material damage

caused by incorrect installation.

Mains voltage at incorrect terminals and plug terminals may destroy the electronics.

▶ Ensure that the mains voltage is correctly

disconnected from the safety extra-low voltage.

▶ Do not connect any mains voltage to ter-

minals BUS, S20, S21, X41.

▶ Only connect the power supply cable to

the terminals that are marked for the purpose.

Note

There is a safety extra-low voltage (SELV) at connections S20 and S21.

Note

If the energy supply company lockout function is used, connect a potential-free normally open contact with a breaking capacity of 24 V/0.1 A to connection S21. You must configure how the connection works in the system control. (For example, if the contact is closed, the electric back-up heater is blocked.)

1. Route the sensor and bus lines into the product through

the rear of the product (→ Page 28).

Note

The cables must fit through the corresponding grommet.

2. At lengths of 10 m or more, mains voltage connection cables must be laid separately from sensor or bus lines. Minimum clearance for the extra low-voltage wire and power supply cable at a line length of > 10 m: 25 cm. If this is not possible, use shielded lines. Lay the shielding on one side of the sheet for the product's electronics box.

3. Shorten the connection cables according to requirements.

30 mm

≤

4. To prevent short circuits if a strand accidentally comes loose, only strip the outer sheathing of flexible lines to a maximum of 30 mm.

5. Ensure the inner conductor insulation is not damaged when stripping the outer sheathing.

6. Only strip inner conductors just enough to establish good, sound connections.

7. To avoid short circuits resulting from loose individual wires, fit conductor end sleeves on the stripped ends of the conductors.

8. Screw the respective plug to the connection cable.

9. Check whether all conductors are inserted mechanically securely in the terminals of the plug. Remedy this if necessary.

10. Plug the plug into the associated PCB slot.

11. Use the strain reliefs (1).

6.12 Connecting the circulation pump

1. Carry out the wiring. (→ Page 32)

2. Route the 230 V connection cable for the circulation pump from the right and into the control PCB's electronics box.

3. Connect the 230 V connection cable to the plug from slot X11 on the control PCB and plug it into the slot.

4. Connect the connection cable for the external button using terminals 1 (0) and 6 (functional drawing) on the X41 edge connector, which is supplied with the control.

5. Plug the edge connector into slot X41 on the control PCB.

6.13 Actuating a circulation pump with an eBUS

controller

1. Ensure that the circulation pump is correctly parametrised in the system control.

2. Select a hot water programme (preparation).

3. Parametrise a circulation programme in the system control.

◁ The pump runs during the time period specified in

the programme.

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Start-up 7

0020257319_02 Hydraulic station Installation and maintenance instructions 33

6.14 Connecting the domestic hot water cylinder

1. Connect the temperature sensor (VR10) for the domestic hot water cylinder to the corresponding connection for cable harness X22 on the control PCB.

2. If an external current anode is installed in the domestic hot water cylinder, connect it to X313 or X314 on the power supply PCB.

◁ The connection plug is included in the bag of small

parts.

6.15 Connecting the external prioritising diverter

valve (optional)

▶ Connect the external prioritising diverter valve to X14 on

the control PCB. – The connection to a permanently live phase "L" with

230 V and to a switched phase "S" is available. Phase "S" is actuated by an internal relay and releases 230 V.

6.16 Using the additional relays

▶ If required, consult the installation diagram handbook

that is contained in the scope of delivery for the system control and the handbook for the optional module.

6.17 Connecting cascades

▶ If you want to use cascades (max. seven units), you must

connect the eBUS line to contact X100 via the VR32b bus coupler (accessory).

6.18 Sealing the power supply PCB

1. Tighten all of the screws on the strain relief clamps.

2. Close the cover for the electronics box on the power supply PCB.

3. Hinge the electronics box back up.

6.19 Checking the electrical installation

▶ After the installation is complete, check the electrical in-

stallation to ensure that the connections that have been established are secured properly and are sufficiently insulated.

7 Start-up

7.1 Activating screed drying without the outdoor

unit and system control

Caution. Risk of damage to the product caused by

impermissible purging

Without purging the heating circuit, the system may become damaged.

▶

If the screed drying is activated without a system control, purge the system manually. No automatic purging takes place.

Screed drying.

– You can use this function to "dry heat" freshly laid screed

in accordance with the construction regulations, accord-

ing to a defined time and temperature schedule, without having a system control or the outdoor unit connected.

When screed drying is activated, all the selected operating modes are interrupted. The function controls the flow temperature of the controlled heating circuit according to a preset programme, regardless of the outdoor temperature.

The display shows the target flow temperature. You can manually set the current day.

Days after starting the function

Target flow temperature for this day [°C]

1 25

2 30

3 35

4 40

5 45

6–12 45

13 40

14 35

15 30

16 25

17–23 10 (frost protection function,

pump in operation)

24 30

25 35

26 40

27 45

28 35

29 25

The day is always changed at 00:00, irrespective of when the function starts.

After a mains Off/On, screed drying starts with the last active day.

The function ends automatically when the last day of the temperature profile has elapsed (day = 29) or if you set the start day to 0 (day = 0).

7.1.1 Activating the screed drying

1. Press the reset button.

2. When restarting the display, press and hold the

but-

ton until the language selection opens.

3. Set the required language. (→ Page 36)

4. Press the

button in order to select the power supply

for the back-up boiler. – 230 V

5. Press the

button in order to select the output of the

back-up boiler.

6. Press the

button in order to select the start day for

the screed drying.

◁ The screed drying is started and the display shows

the current flow temperature and the right-hand status bar shows the system pressure.

▽ In the current programme, the current status mes-

sages for the system can be called up in the display.

▶ Press the

and buttons in order to display

the status messages.

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7 Start-up

34 Installation and maintenance instructions Hydraulic station 0020257319_02

▽ The settings for the function can be changed in the

current programme.

▶ Return to the programme steps in order to

change the settings or the current day.

◁ If the screed drying has not been run successfully

by day 29, the display shows the message Screed drying ending.

▽ If a fault occurs during screed drying, the display

shows the message Fault.

▶ Select a new start day for the screed drying or

interrupt the process.

7.2 Setting the prioritising diverter valve

1. Install the selection lever from the bag of small parts on the prioritising diverter valve.

MAN

AUTO

90°

2. If you want to manually set the prioritising diverter valve, press the knob (1) and turn it 90° clockwise.

◁ You can now turn the selection lever (2) to the re-

quired position.

Note

The notch (3) along the selection lever displays the selected mode.

For example: If the notch along the selection lever is pointing clockwise: The heating circuit is selected.

3. If you want to actuate the heating circuit, turn the selection lever to "Heating circuit".

4. If you want to actuate the domestic hot water cylinder, turn the selection lever to "Domestic hot water cylinder".

5. If you want to actuate the heating circuit and the domestic hot water cylinder, turn the selection lever to "Heating circuit/domestic hot water cylinder".

7.3 Checking and treating the heating water/filling and supplementary water

Caution. Risk of material damage due to poor-qual-

ity heating water

▶ Ensure that the heating water is of suffi-

cient quality.

▶ Before filling or topping up the installation, check the

quality of the heating water.

Checking the quality of the heating water

▶ Remove a little water from the heating circuit. ▶ Check the appearance of the heating water. ▶ If you ascertain that it contains sedimentary materials,

you must desludge the installation.

▶ Use a magnetic rod to check whether it contains mag-

netite (iron oxide).

▶ If you ascertain that it contains magnetite, clean the in-

stallation and apply suitable corrosion-protection measures, or fit a magnetic filter.

▶ Check the pH value of the removed water at 25 °C. ▶ If the value is below 8.2 or above 10.0, clean the installa-

tion and treat the heating water.

▶ Ensure that oxygen cannot get into the heating water.

Checking the filling and supplementary water

▶ Before filling the installation, measure the hardness of the

filling and supplementary water.

Treating the filling and supplementary water

▶ Observe all applicable national regulations and technical

standards when treating the filling and supplementary water.

Provided the national regulations and technical standards do not stipulate more stringent requirements, the following applies:

You must treat the heating water in the following cases:

– If the entire filling and supplementary water quantity dur-

ing the operating life of the system exceeds three times the nominal volume of the heating installation, or

– If the guideline values listed in the following table are not

met, or

– If the pH value of the heating water is less than 8.2 or

more than 10.0.

Applicability: Great Britain

Total heating output

Water hardness at specific system volume

≤ 20 l/kW

> 20 l/kW ≤ 50 l/kW

> 50 l/kW

ppm

CaCO₃

mol/m³ppm

CaCO₃

mol/m³ppm

CaCO₃

mol/

m³

< 50 < 300 < 3 200 2 2 0.02

> 50 to ≤ 200

200 2 150 1.5 2 0.02

> 200 to ≤ 600

150 1.5 2 0.02 2 0.02

> 600 2 0.02 2 0.02 2 0.02

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Start-up 7

0020257319_02 Hydraulic station Installation and maintenance instructions 35

Total heating output

Water hardness at specific system volume

≤ 20 l/kW

> 20 l/kW ≤ 50 l/kW

> 50 l/kW

ppm

CaCO₃

mol/m³ppm

CaCO₃

mol/m³ppm

CaCO₃

mol/

m³

1) Nominal capacity in litres/heating output; in the case of multiboiler systems, the smallest single heating output is to be used.

Applicability: Great Britain

Caution. Risk of material damage if the heating

water is treated with unsuitable additives.

Unsuitable additives may cause changes in the components, noises in heating mode and possibly subsequent damage.

▶ Do not use any unsuitable antifreeze and

corrosion inhibitors, biocides or sealants.

No incompatibility with our products has been detected to date with proper use of the following additives.

▶ When using additives, follow the manufacturer's instruc-

tions without exception.

We accept no liability for the compatibility of any additive or its effectiveness in the rest of the heating system.

Additives for cleaning measures (subsequent flushing required)

– Adey MC3+ – Adey MC5 – Fernox F3 – Sentinel X 300 – Sentinel X 400

Additives intended to remain permanently in the installation

– Adey MC1+ – Fernox F1 – Fernox F2 – Sentinel X 100 – Sentinel X 200

Additives for frost protection intended to remain permanently in the installation

– Adey MC ZERO – Fernox Antifreeze Alphi 11 – Sentinel X 500

▶ If you have used the above-mentioned additives, inform

the end user about the measures that are required.

▶ Inform the end user about the measures required for frost

protection.

7.4 Filling and purging the heating installation

1. Flush the heating installation thoroughly prior to filling.

2. Open all of the thermostatic valves on the heating installation and, if required, all other isolation valves.

3. If no domestic hot water cylinder is connected, seal the product's cylinder flow and cylinder return connection with on-site plugs.

4. Check all of the connections and the entire heating installation for leaks.

5. Switch the prioritising diverter valve to manual operation (→ Page 34) and turn the selection lever to "Heating circuit/domestic hot water cylinder".

◁ Both valves are open and the filling procedure is

improved since the air in the system can escape.

◁ The heating circuit and the spiral immersion heater

for the domestic hot water cylinder are filled at the same time.

6. Connect a filling hose to the filling device (1).

7. To do this, unscrew the screw cap from the filling device and secure the free end of the filling hose to here.

8. Open the purging screw (2) on the automatic air vent (1) in order to purge the product.

9. Open the filling device.

10. Open the heating water supply slowly.

11. Purge the highest radiator or underfloor heating circuit

and wait until the circuit is completely purged.

◁ The water must escape from the purging valve

without bubbles.

12. Fill with water until the manometer (on-site) shows that

the heating installation has reached a pressure of approx. 1.5 bar.

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7 Start-up

36 Installation and maintenance instructions Hydraulic station 0020257319_02

Note

If you fill the heating circuit at an external location, you must install an additional manometer to check the pressure in the installation.

13. Close the filling device.

14. Then check the heating installation pressure again (if required, repeat the filling procedure).

15. Remove the filling hose from the filling device and screw the screw cap back on.

16. Set automatic mode for the prioritising diverter valve again (→ Page 34).

◁ When the product starts up, the diverter valve auto-

matically moves to the "Heating circuit" outlet position.

7.5 Purging

1. Open the automatic air vent.

2. Start the purge programme for the building circuit P06

using: Menu Installer level 17 Test menu Check pro- grammes Purge building circuit P06.

3. Allow the P06 function to run for 15 minutes.

◁ The programme runs for 15 minutes. For 7.5

minutes of that time, the prioritising diverter valve is at the "heating circuit" position. The prioritising diverter valve then switches to the "domestic hot water cylinder" position for 7.5 minutes.

4. Once both purge programmes have finished, check

whether the pressure in the heating circuit is 1.5 bar.

◁ Top up with water if the pressure is below 1.5 bar.

7.6 Starting up the product

Caution. Risk of material damage in the event of

frost.

If the installation is switched on when there is ice in the lines, the installation may be mechanically damaged.

▶ You must observe the frost protection

instructions.

▶ Do not switch the installation on when

there is a risk of frost.

Note

The product does not have an on/off switch. The product is switched on as soon as it is connected to the power grid.

1. Use the partition that is installed on-site (e.g. fuses or

power switches) to switch on the product.

◁ The display shows the basic display. ◁ The basic display appears on the system control

display.

◁ The system's products start up. ◁ The heating and domestic hot water demand are

activated by default.

2. When you start up the heat pump system for the first time after electrical installation, the installation assistants for the system components will start automatically. Set the required values on the control panel of the indoor unit first, then on the optional system control and the other system components.

7.7 Running the installation assistants

The installation assistant is launched when the product is switched on for the first time. It provides direct access to the most important check programmes and configuration settings for starting up the product.

Menu → Installer level → 17 → Configuration.

Confirm the launch of the installation assistant. All heating and domestic hot water demands are blocked whilst the installation assistant is active.

To access the next item, confirm by pressing Next in each case.

If you do not confirm the launch of the installation assistant, it is closed 10 seconds after you switch on the unit and the basic display then appears.

7.7.1 Setting the language

▶

Press OK twice to confirm the set language and to avoid unintentionally changing it.

▽ If you have accidentally set a language that you do

not understand:

▶ You can change the language as follows: ▶ Menu → Basic settings → Language. ▶ Select the required language. ▶ Confirm the selection by pressing OK.

7.7.2 Telephone number for the competent person

You can store your telephone number in the product menu.

The end user can display it in the information menu. The telephone number can be up to 16 digits long and must not contain any spaces. If the telephone number is shorter, end the entry after the last digit by pressing

All of the digits to the right will be deleted.

7.7.3 Ending the installation assistant

▶ Once you have run through the installation assistant suc-

cessfully, confirm by pressing

◁ The installation assistant will close and will not launch

again when the product is next switched on.

7.8 Energy balance control

The energy balance is the integral from the difference between the flow temperature actual value and target value, which is added up every minute. If the set heat deficit (WE =

-60°min in heating mode) is reached, the heat pump starts.

If the supplied heat volume corresponds to the heat deficit (integral = 0°min), the heat pump is switched off.

The energy balancing is used for heating and cooling mode.

Page 39

Start-up 7

0020257319_02 Hydraulic station Installation and maintenance instructions 37

7.9 Compressor hysteresis

The heat pump is switched on and off via the compressor hysteresis for heating mode and also for energy balancing. When the compressor hysteresis is above the target flow temperature, the heat pump is switched off. When the hysteresis is below the target flow temperature, the heat pump starts up again.

7.10 Enabling the electric back-up heater

On the system control, you can select whether the electric back-up heater is to be used for heating mode, domestic hot water mode or both modes. Set the maximum output for the electric back-up heater at the indoor unit's control panel here.

▶ Activate the internal electric back-up heater with one of

the following output levels.

▶ Ensure that the maximum output for the electric back-up

heater does not exceed the output of the fuse protection for the household electricity system (for rated currents, see Technical Data).

Note

Otherwise, the home's internal circuit breaker may trigger if, when there is insufficient heat source output, the electric back-up heater that is not derated is switched on.

▶

You can find the output levels for the electric back-up heater in the tables in the appendix.

5.4 kW back-up heater (→ Page 57)

8.54 kW back-up heater at 230 V (→ Page 57)

8.54 kW back-up heater at 400 V (→ Page 58)

7.11 Setting the anti-legionella function

▶ Set the anti-legionella function using the system control.

To ensure sufficient legionella protection, the electric backup heater must be activated.

7.12 Purging

You can use the installation assistant to run through the purging programmes.

▶ To do this, read the purging section. (→ Page 36)

7.13 Calling up the installer level

1. Press

and at the same time.

2. Navigate to Menu → Installer level and confirm by

pressing

(OK).

3. Set the value 17 (code) and confirm by pressing

7.14 Restarting the installation assistants

You can restart the installation assistant at any time by calling it up in the menu.

Menu → Installer level → Start inst. assistant.

7.15 Calling up statistics

Menu → Installer level → Test menu → Statistics

You can use this function to call up the statistics for the heat pump.

7.16 Using check programmes

You can call up the check programmes via Menu → Installer level → Test menu → Check programmes.

You can activate various special functions in the product by using various check programmes.

If the product is in error condition, you cannot start any check programmes. You can detect an error condition by the fault symbol shown in the left bottom corner of the display. You must first reset.

To end the check programmes, you can press Cancel at any time.

7.17 Carrying out the actuator test

Menu → Installer level → Test menu → Sensor/actuator test

You can check that the components of the heating installation are functioning correctly using the sensor/actuator test. You can actuate more than one actuator at a time.

If you do not select anything to change, you can have the current control values for the actuators and the sensor values displayed.

You can find a list of the sensor characteristic values in the appendix.

Characteristic values for the temperature sensor, refrigeration circuit (→ Page 58)

Characteristic values for the internal temperature sensors, hydraulic circuit (→ Page 59)

Characteristic values for the VRC DCF outdoor temperature sensor (→ Page 61)

7.18 Starting up the optional system control

The following work for starting up the system was carried out:

– The system control and the outdoor temperature sensor

have been installed and wired.

– Start-up of all system components (except for the system

control) is complete.

Follow the installation assistant and the operating and installation instructions for the system control.

Page 40

8 Operation

38 Installation and maintenance instructions Hydraulic station 0020257319_02

7.19 Display of the filling pressure in the heat pump circuit

The product has a pressure sensor in the heating circuit and a digital pressure display.

▶ Select Menu Live Monitor to display the filling pressure

in the heat pump circuit.

◁ To ensure that the heat pump circuit works correctly,

the filling pressure must be between 1 bar and 1.5 bar. If the heating installation extends over several storeys, higher filling pressures may be required to avoid air entering the heating installation.

7.20 Preventing low water pressure in the heating circuit

▶ Remove the front casing and read the water pressure on

the product's manometer.

▶ Check whether the pressure is between 1 and 1.5 bar.

◁ If the pressure in the heating circuit is too low, add

more water using the pre-installation jig's filling device.

7.21 Checking function and leak-tightness

Before you hand the product over to the end user:

▶ Check that the heating installation (heat generator and

system) and the domestic hot water pipes are leak-tight.

▶ Check whether the drain pipework for the purging con-

nections has been installed correctly.

8 Operation

8.1 Operating concept of the product

The operating concept and the display and setting options of the end user level are described in the operating instructions.

9 Adapting the unit to the heating

installation

9.1 Configuring the heating installation

The installation assistant is launched when the product is switched on for the first time. When the installation assistant is complete, you can further adjust the parameters of the installation assistant, for example, in the Configuration menu.

To adjust the water flow rate generated by the heat pump to match the specific installation, you can set the maximum available pressure for the heat pump in the heating and domestic hot water mode.

You can call up these two parameters via Menu → Installer level → Configuration.

The adjustment range is between 200 mbar and 900 mbar. The heat pump operates at its optimum level when the nominal flow can be achieved by setting the available pressure (Delta T = 5 K).

9.2 Remaining feed head of the product

The remaining feed head cannot be set directly. You can limit the remaining pump head in order to adjust the on-site pressure loss in the heating circuit.

The integrated pump attempts to reach the nominal volume flow.

9.2.1 VWL 57/5 remaining feed head at nominal volume flow

200

400

600

800

40 50 60 70 80 90 100

1 VWL 57/5,

3.5 kW/540 l/h

2 VWL 57/5, 5 kW/790 l/h

A Remaining feed head in

hPa (mbar)

B Pump output in %

9.2.2 VWL 77/5 remaining feed head at nominal volume flow

200

400

600

800

40 50 60 70 80 90 100

1 VWL 77/5,

7 kW/1020 l/h

A Remaining feed head in

hPa (mbar)

B Pump output in %

9.2.3 VWL 127/5 remaining feed head at nominal volume flow

200

400

600

800

40 50 60 70 80 90 100

1 VWL 127/5,

10 kW/1670 l/h

2 VWL 127/5,

12 kW/1850 l/h

A Remaining feed head in

hPa (mbar)

B Pump output in %

Page 41

Troubleshooting 10

0020257319_02 Hydraulic station Installation and maintenance instructions 39

9.3 Setting the flow temperature in heating mode (with no control connected)

1. Press

( ).

◁ The display shows the flow temperature in heating

mode.

2. Change the flow temperature in heating mode by press-

ing

or .

– Max. heating mode target flow temperature: 75 ℃

3. Confirm this change by pressing

(OK).

9.4 Instructing the end user

Danger! Risk of death from legionella.

Legionella multiply at temperatures below 60 °C.

▶ Ensure that the end user is familiar with

all of the Anti-legionella measures in order to comply with the applicable regulations regarding legionella prevention.

▶ Explain to the end user how the safety devices work and

where they are located.

▶ Inform the end user how to handle the product. ▶ Draw particular attention to the safety warnings, which

the end user must follow.

▶ Inform the end user that they must have the product

maintained in accordance with the specified intervals.

▶ Explain to the end user how to check the system's water

volume/filling pressure.

▶ Pass all of the instructions and documentation for the

product to the end user for safe-keeping.

10 Troubleshooting

10.1 Contacting your service partner

If you contact your service partner, please mention if possible:

– The fault code that is displayed (F.xx) – The status code (S.xx) that is displayed by the product in

the Live Monitor

10.2 Displaying the Live Monitor (current product status)

Menu → Live Monitor

Status codes in the display provide information on the product's current operating mode. These can be called up via the Live Monitor menu.

Status codes (→ Page 50)

10.3 Checking fault codes

The display shows a fault code F.xxx.

Fault codes have priority over all other displays.

Fault codes (→ Page 53)

If multiple faults occur at the same time, the display shows the corresponding fault codes for two seconds each in sequence.

▶ Eliminate the fault. ▶ To restart the product, press the reset button ( Operating

instructions).

▶ If you are unable to eliminate the fault and the fault re-

curs despite several reset attempts, contact Customer Service.

10.4 Querying the fault memory

Menu → Installer level Fault list

The product has a fault memory. You can use this to query the last ten faults that occurred in chronological order.

Display views:

– Number of faults that occurred – The fault currently selected with fault number F.xxx

▶ Use the

or button to display the last ten faults that

occurred.

10.5 Resetting the fault memory

1. Press Delete.

2. Confirm that you wish to clear the fault memory by pressing OK.

10.6 Using check programmes

You can also use the check programmes for troubleshooting. (→ Page 37)

10.7 Resetting parameters to factory settings

▶ Select Menu → Installer level → 17 → Resets to reset

all of the parameters at the same time and to restore the product to its factory settings.

10.8 Safety cut-out

The product has a safety cut-out.

If the safety cut-out has tripped, the cause must be eliminated and the safety cut-out replaced.

▶ See the "Fault codes" table in the appendix.

Fault codes (→ Page 53)

▶ Check the back-up heater for damage due to overheat-

ing.

▶ Check that the power supply for the power supply PCB is

working properly.

▶ Check the cabling for the power supply PCB. ▶ Check the cabling for the back-up heater. ▶ Check that all temperature sensors are working properly. ▶ Check that all other sensors are working properly. ▶ Check the pressure in the heating circuit. ▶ Check that the heating circuit pump is working properly. ▶ Check whether there is air in the heating circuit.

Page 42

11 Inspection and maintenance

40 Installation and maintenance instructions Hydraulic station 0020257319_02

10.8.1 Replace the safety cut-out

1. Disconnect the product from the power grid and protect it against being switched back on.

2. Remove the front casing.

3. Remove both screws (1) and remove the safety cut-out with the retainer from the product.

4. Remove all cables from the safety cut-out. Observe the closing mechanism for the cable duct.

5. Remove the safety cut-out from the retainer by undoing the two screws (2).

6. Undo the nuts on the upper side of the back-up heater and remove the temperature sensor.

7. Connect cables of the same colour to opposite sides of each other on the safety cut-out.

8. Install the new safety cut-out in reverse order.

10.9 Preparing the repair work

1. Switch off the product.

2. Disconnect the product from the power supply.

3. Secure the product against being switched back on again.

4. Remove the front casing.

5. Close the service valves in the heating flow and in the heating return.

6. Close the service valve in the cold water pipe.

7. Drain the product if you want to replace water-bearing components of the product.

8. Ensure that water does not drip on live components (e.g. the electronics box).

9. Use only new seals.

11 Inspection and maintenance

11.1 Inspection and maintenance information

11.1.1 Inspection

The inspection is intended to determine the actual condition of a product and compare it with the target condition. This is done by measuring, checking and observing.

11.1.2 Maintenance

Maintenance is required in order to eliminate any deviations between the actual condition and the target condition. This is normally done by cleaning, setting and, if necessary, replacing individual components that are subject to wear.

11.2 Procuring spare parts

The original components of the product were also certified by the manufacturer as part of the declaration of conformity. If you use other, non-certified or unauthorised parts during maintenance or repair work, this may void the conformity of the product and it will therefore no longer comply with the applicable standards.

We strongly recommend that you use original spare parts from the manufacturer as this guarantees fault-free and safe operation of the product. To receive information about the available original spare parts, contact the contact address provided on the back page of these instructions.

▶ If you require spare parts for maintenance or repair

work, use only the spare parts that are permitted for the product.

11.3 Checking maintenance messages

If the

symbol is shown in the display, the product requires maintenance work or the product is in comfort protection mode.

▶ To obtain further information, call up the Live Monitor. ▶ Carry out the maintenance work that is listed in the table.

Maintenance messages (→ Page 52)

Condition: Lhm.XX is displayed

The product is in Comfort protection mode. The product has detected a permanent fault and continues to run with restricted comfort.

▶ To determine which component is defective, read the

fault memory (→ Page 39).

Note

If a fault message is present, the product remains in comfort protection mode after it is reset. After the product is reset, the fault message is displayed first before the message Limp home mode (comfort protection) appears again.

▶ Check the component that is displayed and replace it.

Page 43

Draining 12

0020257319_02 Hydraulic station Installation and maintenance instructions 41

11.4 Observing inspection and maintenance intervals

▶ Use the "Inspection and maintenance work" table in the

appendix.

▶ Adhere to the minimum inspection and maintenance in-

tervals. Carry out all of the work that is mentioned.

▶ Carry out maintenance work on the product at an earlier

point if the results of the inspection that was carried out during previous maintenance make this necessary.

11.5 Preparing for inspection and maintenance

Observe the basic safety rules before carrying out inspection and maintenance work or installing spare parts.

▶ Switch off the product. ▶ Disconnect the product from the power supply. ▶ Secure the product against being switched back on

again.

▶ When working on the product, protect all electric com-

ponents from spraying water.

▶ Remove the front casing.

11.6 Checking the admission pressure of the expansion vessel

1. Close the service valves and drain the heating circuit.

(→ Page 41)

2. Measure the pre-charge pressure of the expansion ves-

sel (1) at the valve (2).

Result:

Note

The required pre-charge pressure of the heating installation may vary depending on the static pressure (0.1 bar per metre in height).

Pre-charge pressure is below 0.75 bar (±0.1 bar/m)

▶ Fill the expansion vessel with nitrogen. If nitrogen is

not available, use air.

3. Fill the heating circuit. (→ Page 35)

11.7 Checking and correcting the filling pressure of the heating installation

If the filling pressure falls below the minimum pressure, a maintenance message is shown on the display.

– Min. heating circuit pressure: ≥ 0.05 MPa (≥ 0.50 bar)

▶ Top up the heating water in order to start up the heat

pump again; Filling and purging the heating installation (→ Page 35).

▶ If you notice frequent pressure losses, determine and

eliminate the cause.

11.8 Checking the high-pressure switch-off

▶ Start check programme P.29 High pressure.

◁ The compressor starts and the flow rate monitoring

for the pump is deactivated.

▶ Block the heating circuit.

◁ The product is switched off by the high-pressure

switch-off.

11.9 Completing inspection and maintenance

Warning. Risk of burns due to hot and cold com-

ponents.

There is a risk of burns from any uninsulated pipelines and from the electric backup heater.

▶ Before starting up the unit, install any cas-

ing sections that have been removed.

1. Start up the heat pump system.

2. Check that the heat pump system is working without

any problems.

12 Draining

12.1 Draining the product's heating circuit

1. Close the service valves in the heating flow and in the

heating return.

2. Remove the front casing. (→ Page 25)

3. Connect a hose to the filling device (1) and guide the

free end of the hose to a suitable drainage point.

Page 44

13 Decommissioning

42 Installation and maintenance instructions Hydraulic station 0020257319_02

4. Use manual actuation to move the prioritising diverter valve to the "Heating circuit/domestic hot water cylinder" position.

5. Open the stopcock on the filling device.

6. Open the automatic air vent.

7. Use the expansion relief valve to check whether the heating circuit has been completely drained.

◁ Residual hot water may escape from expansion

relief valve's drain.

12.2 Draining the heating installation

1. Connect a hose to the draining point of the installation.

2. Route the free end of the hose to a suitable drainage point.

3. Ensure that the installation's service valves are open.

4. Open the drain cock.

5. Open the purging valves on the radiators. Start from the highest radiator and then work from the top to the bottom.

6. Once the heating water has completely drained from the installation, close the purging valves on all the radiators and the drain cock again.

13 Decommissioning

13.1 Temporarily decommissioning the product

1. Switch off the disconnector (circuit breaker) to which the product is connected in the building.

2. Disconnect the product from the power supply.

13.2 Permanently decommissioning the product

1. Switch off the isolator (circuit breaker) to which the product is connected in the building.

2. Disconnect the product from the power supply.

Caution. Risk of material damage when extracting

refrigerant.

When extracting refrigerant, there is a risk of material damage caused by freezing.

▶ Ensure that heating water flows through

the indoor unit's condenser (heat exchanger) or it is completely drained when extracting refrigerant on the secondary side.

3. Extract the refrigerant.

4. Dispose of or recycle the product and its components.

14 Recycling and disposal

14.1 Recycling and disposal

Disposing of the packaging

▶ Dispose of the packaging correctly. ▶ Observe all relevant regulations.

14.2 Disposing of the product and accessories

▶ Do not dispose of the product or the accessories with

household waste.

▶ Dispose of the product and all accessories correctly. ▶ Observe all relevant regulations.

14.3 Disposing of the refrigerant

Warning. Risk of damage to the environment.

▶ Before the product is disposed of, have

the refrigerant which it contains completely drained into a suitable vessel so that it can then be recycled or disposed of in accordance with regulations.

Caution. Risk of damage caused by defrosting.

Draining off the refrigerant generates intense cooling of the indoor unit's plate heat exchanger, which may lead to the de-icing of the plate heat exchanger on the heating water side.

▶ Drain the indoor unit on the heating water

side in order to prevent damage.

▶ Ensure that, during the refrigerant draining

of the plate heat exchanger on the heating water side, there is sufficient flow-through.

▶ Ensure that the refrigerant is disposed of by a qualified

competent person.

Page 45

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 43

Appendix

A Wiring diagram

12345

321

X302

X300X310X311

X312

X314

X313

321

L1 L1S

L2S

L3S

L1 L1S

L2S

L3S

8765432

L3_6

L3_5

L2_4

L2_3

L1_2

L1_1

X301

X328

12116

2 3

1 Power supply PCB

2 For single power supply: 230 V bridge between

X311 and X310; for dual power supply: Replace the bridge at X311 with the 230 V connection

3 Earthing

4 [X300] Power supply connection

5 Earth wire to X1 on the control PCB

6 [X302] Safety cut-out

7 [X301] Back-up heater

8 [X328] Data connection to the control PCB

9 [X313] Power supply for the control PCB or the op-

tional VR 70/VR 71 or the optional external current anode

10 [X314] Power supply for the control PCB or the op-

tional VR 70/VR 71 or the optional external current anode

11 [X312] Power supply for the control PCB or the op-

tional VR 70/VR 71 or the optional external current anode

Page 46

Appendix

44 Installation and maintenance instructions Hydraulic station 0020257319_02

B Control PCB

X11

S20

S21

BUS

X21

X22

918

17 16 15 14 13 12 11 10

X28

127

11 10

919

18 17 16 15 14 13 12 11

X16

X13

X15

X14

X24

7 8

13 14 15 16

eBUS

6 5 4 3 2 1

X29

1 2

X100 / X106

X41

DCF

0 0

FB AF

1 Control PCB

2 [X51] Display edge connector

3 [X29] eBUS bus connection for the installed system

control

4 [X24] Coding resistor 3

5 [X24] Coding resistor 2

6 [X41] Edge connector (outdoor temperature sensor,

DCF, system temperature sensor, multi-function input)

7 [X106/S20] Limit thermostat

8 [X106/S21] ESCO contact

9 [X106/BUS] eBUS bus connection (outdoor unit,

VRC 700, VR 70 / VR 71 )

10 [X16] Internal heating pump

11 [X15] Internal prioritising diverter valve for heating

circuit/cylinder charging

12 [X11] Multi-function output 2: Domestic hot water

circulation pump

13 [X13] Multi-function output 1

14 [X14] Multi-function output: External back-up

heater/external prioritising diverter valve

15 [X1] 230 V supply for control PCB

16 Earth wire for the power supply PCB

17 [X28] Data connection to the power supply PCB

18 [X22] Immersion heater flow temperature sensor

19 [X22] Heating pump signal

20 [X22] Pressure sensor

21 [X22] Building circuit flow temperature sensor

22 [X22] Building circuit return temperature sensor

23 [X22] Domestic hot water cylinder temperature

sensor

24 [X21] Condenser outlet temperature sensor (EEV

outlet)

25 [X21] Condenser inlet temperature sensor

Page 47

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 45

C Basic connection diagram for the energy supply company lockout, shutdown via

connection S21

3~/400V

1~/230V

BUSS21 BUS

X106

L1L1 L2 L3 NLN

X300X311

X310

kWh

L1 L2 L3 NLN

X200

BUS

X206X210

X211

kWh

L1 L2 L3

5 5

BUSS21 BUS

X106

L1L1 L2 L3 NLN

X300X311

X310

L1 L2 L3 NL N

X200

BUS

X206X210

X211

3 3

1 2 3 4

78910

1 Meter/fuse box

2 Household electricity meter

3 Heat pump electricity meter

4 Ripple control receiver

5 Potential-free normally open contact, for actuating

S21, for the energy supply company lockout function

6 Disconnector (circuit breaker, fuse)

7 System control

8 Indoor unit, control PCB

9 Indoor unit, power supply PCB

10 Outdoor unit, PCB INSTALLER BOARD

Page 48

Appendix

46 Installation and maintenance instructions Hydraulic station 0020257319_02

D Basic connection diagram for the energy supply company lockout, shutdown via

partition

3~/400V 1~/230V

L1 L2 L3 NL N

X200

BUS

X206X210

X211

BUSS21 BUS

X106

L1L1 L2 L3 NLN

X300X311

X310

kWh

L1 L2 L3

kWh

L1 L2 L3 NLN

X200

BUS

X206X210

X211

BUSS21 BUS

X106

L1L1 L2 L3 NLN

X300X311

X310

5 5

3 3

1 2 3 4

78910

1 Meter/fuse box

2 Household electricity meter

3 Heat pump electricity meter

4 Ripple control receiver

5 Partition, for the energy supply company lockout

function

6 Disconnector (circuit breaker, fuse)

7 System control

8 Indoor unit, control PCB

9 Indoor unit, power supply PCB

10 Outdoor unit, PCB INSTALLER BOARD

Page 49

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 47

E Installer level overview

Setting level Values Unit Increment, select, ex-

planation

Factory setting Setting

Min. Max.

Installer level →

Enter code 00 99 1 (competent person

code 17)

Installer level → Fault list →

F.XX – F.XX

Current value

Installer level → Test menu → Statistics →

Compressor hours Current value h

Compressor starts Current value

Build. pump hours Current value h

Build. pump starts Current value

4-port valve hours Current value h

4-port valve sw. ops Current value

Fan 1: Hours Current value h

Fan 1: Starts Current value

Fan 2: Hours Current value h

Fan 2 starts Current value

EEV steps Current value

DHW PDV switch. ops Current value

Im. heater power cons. Current value kWh

Im. heater op. hours Current value h

Im. heater switch. ops Current value

No. switch. ops Current value

Installer level → Test menu → Check programmes →

P.04 Heating mode Select

P.06 Purge building circuit Select

P.11 Cooling mode Select

P.12 De-icing Select

P.27 Immersion heater Select

P.29 High pressure Select

Installer level → Test menu → Sensor/actuator test →

T.0.17 Fan 1 0 100 % 5 0

T.0.18 Fan 2 0 100 % 5 0

T.0.19 Condensate tray heater Off On On, Off

T.0.20 4-port valve Off On On, Off

T.0.21 Position: EEV 0 100 % 5 0

T.0.23 Heating coil compressor Off On On, Off

T.0.48 Air inlet temperature -40 90 ℃ 0.1

T.0.55 Compressor outlet temperature

-40 135 ℃ 0.1

T.0.56 Compressor inlet temperature

-40 90 ℃ 0.1

T.0.57 EEV outlet temperature -40 90 ℃

See the overview of fault codes: Fault lists are only available, and can only be deleted, if faults have occurred.

Page 50

Appendix

48 Installation and maintenance instructions Hydraulic station 0020257319_02

Setting level Values Unit Increment, select, ex-

planation

Factory setting Setting

Min. Max.

T.0.63 High pressure 0 42.5 bar (abs) 0.1

T.0.67 High-pressure switch Off On On, Off

T.0.85 Evaporation temperature -40 90 ℃ 0.1

T.0.86 Condensation temperature -40 70 ℃ 0.1

T.0.87 Overheating target value -40 90 K 0.1

T.0.88 Overheating actual value -40 90 K 0.1

to 20 K are normal operating parameters

T.0.89 Subcooling target value -40 90 K 0.1

T.0.90 Subcooling actual value -40 90 K 0.1

T.0.93 Compressor speed 0 120 Rotation/s 1

T.0.123 Temperature switch: Compressor outlet

Off On On, Off

T.1.01 Building circuit pump power

0 100 % 5, off Off

T.1.02 DHW prioritising diverter valve

Heating Domestic

hot water

Heating, Domestic hot water

Heating

T.1.40 Flow temperature -40 90 ℃ 0.1

T.1.41 Return temperature -40 90 ℃ 0.1

T.1.42 Building circuit: Pressure 0 3 bar 0.1

T.1.43 Building circuit: Flow rate 0 4000 l/h 1

T.1.44 Cylinder temperature -40 90 ℃ 0.1

T.1.46 Lockout contact S20 Closed Open Closed, Open Closed

T.1.59 Capacitor outlet temperature

-40 90 ℃ 0.1

T.1.69 Outdoor temperature -40 90 ℃ 0.1

T.1.70 System temperature -40 90 ℃ 0.1

T.1.71 DCF status Current value No DCF signal

Validate DCF signal

Valid DCF signal

T.1.72 Lockout contact S21 Closed Open Closed, Open Open

T.1.119 MO1 output Off On Off, On Off

T.1.124 Safety cut-out immersion heater

Closed Open Closed, Open Closed

T.1.125 MPI input Current value

T.1.126 MO2 output Off On Off, On Off

T.1.127 MO3 output Off On Off, On Off

Installer level → Configuration →

Language Current language Languages available for

selection

02 English

Contact details → Telephone number

Phone number 0–9

MO relay Fault signal

Ext. immersion heater

DHW 3WV

None

Compr.start heat. from −999 9 °min 1 −60

Compr.start cool. from 0 999 °min 1 60

Compressor hyster. 3 15 K Applies for heating

mode only:

See the overview of fault codes: Fault lists are only available, and can only be deleted, if faults have occurred.

Page 51

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 49

Setting level Values Unit Increment, select, ex-

planation

Factory setting Setting

Min. Max.

Max. rem. feed head 200 1100 mbar 10 1100

DHW mode 0 = ECO 1 = Nor-

mal

0, 1 0

Max. anti-cycl. time 0 9 h 1 5

Reset anti-cycl. time → Anti-cycl. time after pow. supp. switch-on

0 120 min 1 0

Im. heater outp. range External 9 kW 5 kW and 7 kW: 230 V

and 400 V: 1–6: 1 kW – 6 kW

12 kW, 230 V: 1–6: 1 kW – 6 kW

12 kW, 400 V: 1–9: 1 kW – 9 kW

6 or 9

Compr. current limit VWL 58/5 IS + VWL

78/5 IS: 13 - 16 A

VWL 128/5 IS: 20 - 25 A

Compr. noise reduct. 40 60 % 1 40

Soft modulation Off On Off, On On

Only for products with cooling:

Cooling technology

None Active

cooling

None, active cooling None

Software version Current value of the

control PCB (HMU indoor unit xxxx, HMU outdoor unit xxxx) and the display (AI xxxx)

xxxx.xx.xx

Installer level → Resets →

Statistics → Reset statistics? Yes, No No

Statistics → Reset fault? Yes, No No

Factory settings → Restore factory settings

Yes, No No

Installer level → Start inst. assistant →

Language Languages available for

selection

02 English

Syst. control avail.? Yes no Yes, No

Im. heater power supp. 230 V 400 V

Im. heater outp. range External 9 kW 5 kW and 7 kW: 230 V

and 400 V: 1–6: 1 kW – 6 kW

12 kW, 230 V: 1–6: 1 kW – 6 kW

12 kW, 400 V: 1–9: 1 kW – 9 kW

6 or 9

Cooling technology No cool-

ing

Active cooling

Compr. current limit 13 25 A 1

5 – 7 kW: 13 – 16 A 12 kW: 20 – 25 A

MO relay None, fault signal, ext.

immersion heater, DHW 3WV

None

Check program: Purge building circuit

Yes no Yes, No no

See the overview of fault codes: Fault lists are only available, and can only be deleted, if faults have occurred.

Page 52

Appendix

50 Installation and maintenance instructions Hydraulic station 0020257319_02

Setting level Values Unit Increment, select, ex-

planation

Factory setting Setting

Min. Max.

Contact details Telephone number

Phone number 0–9 Empty

End the installation assistant? Yes, back

See the overview of fault codes: Fault lists are only available, and can only be deleted, if faults have occurred.

F Status codes

Statuscode Meaning

S.34 Heating mode: Frost protection

If the measured outdoor temperature falls below XX °C, the temperature of the heating circuit's flow and return is monitored. If the temperature difference exceeds the set value, the pump and compressor are started without a heat demand.

S.100 Standby There is no heat demand or cooling demand. Standby 0: Outdoor unit. Standby 1: Indoor unit

S.101 Heating: Compressor shutdown

The heat demand is met, the demand is ended by the system control and the heat deficit is offset. The compressor is switched off.

S.102 Heating: Compressor blocked

The compressor is blocked for heating mode because the heat pump is outside of its operating limits.

S.103 Heating: Prerun The start conditions for the compressor in heating mode are checked. Start the other actuators for

heating mode.

S.104 Heating: Compressor active

The compressor works in order to meet the heat demand.

S.107 Heating: Overrun The heat demand is met, the compressor is switched off. The pump and fan overrun.

S.111 Cooling: Compressor shutdown

The cooling demand is met, the demand is ended by the system control. The compressor is switched off.

S.112 Cooling: Compressor blocked

The compressor is blocked for cooling mode because the heat pump is outside of its operating limits.

S.113 Cooling: Compressor mode prerun

The start conditions for the compressor in cooling mode are checked. Start the other actuators for cooling mode.

S.114 Cooling: Compressor active

The compressor works in order to meet the cooling demand.

S.117 Cooling: Compressor mode overrun

The cooling demand is met, the compressor is switched off. The pump and fan overrun.

S.125 Heating: Immersion heater active

The immersion heater is used in heating mode.

S.132 Domestic hot water: Compressor blocked

The compressor is blocked for domestic hot water mode because the heat pump is outside of the operating limits.

S.133 Domestic hot water: Prerun

The start conditions for the compressor in domestic hot water mode are checked. Start the other actuators for domestic hot water mode.

S.134 Domestic hot water: Compressor active

The compressor works in order to meet the domestic hot water demand.

S.135 Domestic hot water: Immersion heater active

The immersion heater is used in domestic hot water mode.

S.137 Domestic hot water: Overrun

The domestic hot water demand is met, the compressor is switched off. The pump and fan overrun.

S.141 Heating: Immersion heater shutdown

The heat demand is met, the immersion heater is switched off.

S.142 Heating: Immersion heater blocked

The immersion heater is blocked for heating mode.

S.151 Domestic hot water: Immersion heater shutdown

The domestic hot water demand is met, the immersion heater is switched off.

S.152 Domestic hot water: Immersion heater blocked

The immersion heater is blocked for domestic hot water mode.

S.173 Anti-cycling time for the energy supply company

The mains voltage supply is interrupted by the energy supply company. The maximum anti-cycling time is set in the configuration.

S.202 Check programme: Purging of building circuit active

The building circuit pump is actuated in cyclical intervals, alternately in heating mode and domestic hot water mode.

S.203 Actuator test active The sensor and actuator test is currently operating.

S.212 Connection fault: Control not recognised

System control was previously detected but the connection is broken. Check the eBUS connection to the system control. It can only be operated with the heat pump's additional functions.

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0020257319_02 Hydraulic station Installation and maintenance instructions 51

Statuscode Meaning

S.240 Compr. oil temp. too low, environment too cold

The compressor heating is switched on. The unit does not start up.

S.252 Fan unit 1: Fan blocked If the fan speed is 0 rpm, the heat pump is switched off for 15 minutes and then restarted. If the fan

does not start up after four unsuccessful restarts, the heat pump is switched off and the fault message F.718 is displayed.

S.255 Fan unit 1: Air inlet temp. too high

The compressor does not start because the outdoor temperature at the fan is above the operating limits. Heating mode: > 43 °C. Domestic hot water mode: > 43 °C. Cooling mode: > 46 °C.

S.256 Fan unit 1: Air inlet temp. too low

The compressor does not start because the outdoor temperature at the fan is below the operating limits. Heating mode: < -20 °C. Domestic hot water mode: < -20 °C. Cooling mode: < 15 °C.

S.260 Fan unit 2: Fan blocked If the fan speed is 0 rpm, the heat pump is switched off for 15 minutes and then restarted. If the fan

does not start up after four unsuccessful restarts, the heat pump is switched off and the fault message F.785 is displayed.

S.272 Building circuit: Remaining feed head limit active

The remaining feed head that is set under the configuration is reached.

S.273 Building circuit: Flow temperature too low

The flow temperature that is measured in the building circuit is below the operating limits.

S.275 Building circuit: Flow rate too low

Building circuit pump defective. All consumers in the heating system are closed. Flow rate is too low for recording with the volume flow sensor (< 120 l/h). The values fall below the specific minimum volume flows. Check that the dirt filter is permeable. Check the stopcocks and thermostatic valves. Ensure that the flow rate is at least 35% of the nominal flow rate. Check that the building circuit pump functions correctly.

S.276 Building circuit: Lockout contact S20 open

Contact S20 is open at the heat pump's main PCB. Incorrect limit thermostat setting. Flow temperature sensor (heat pump, gas-fired boiler, system sensor) measures values that deviate downwards. Adjust the maximum flow temperature for the direct heating circuit via the system control (observe the upper switch-off threshold for the boilers). Adjust the set value for the limit thermostat. Check the sensor values

S.277 Building circuit: Pump fault

If the building circuit pump is inactive, the heat pump is switched off for 10 minutes and is then restarted. If the building circuit pump does not start up after three unsuccessful restarts, the heat pump is switched off and the fault message F.788 is displayed.

S.280 Freq. converter fault: Compressor

The compressor motor or wiring is defective.

S.281 Freq. converter fault: Mains voltage

There is overvoltage or undervoltage.

S.282 Freq. converter fault: Overheating

If the cooling of the frequency inverter is not sufficient, the heat pump is switched off for one hour and then restarted again. If the cooling is not sufficient after three unsuccessful restarts, the heat pump is switched off and the fault message F.819 is displayed.

S.283 De-icing time too long If the de-icing takes longer than 15 minutes, the heat pump is restarted. If the time for the de-icing is

still not sufficient after three unsuccessful restarts, the heat pump is switched off and the fault message F.741 is displayed. ► Check whether sufficient thermal energy is available from the building circuit.

S.284 De-icing flow temperature too low

If the flow temperature is below 5 °C, the heat pump is restarted. If the flow temperature is still not sufficient after three unsuccessful restarts, the heat pump is switched off and the fault message F.741 is displayed. ► Check whether sufficient thermal energy is available from the building circuit.

S.285 Compressor outlet temperature too low

Compressor outlet temperature is too low

S.286 Hot gas temperature switch open

If the hot gas temperature is above 119 °C +5 K, the heat pump is switched off for one hour and then restarted again. If the hot gas temperature has not fallen after three unsuccessful restarts, the heat pump is switched off and the fault message F.823 is displayed.

S.287 Fan 1: Wind Before starting, the fan rotates at a speed of 50 rpm or higher. This may be caused by a strong out-

side wind.

S.288 Fan 2: Wind Before starting, the fan rotates at a speed of 50 rpm or higher. This may be caused by a strong out-

side wind.

S.289 Current limit active The outdoor unit's power consumption is reduced, the compressor speed is reduced. The com-

pressor's operating current exceeds the limit value that is set under the configuration. (for 3 kW, 5 kW, 7 kW units: <16 A; for 10 kW, 12 kW units: <25 A)

S.290 Switch-on delay active The compressor's switch-on delay is active.

S.302 High-pressure switch open

If the pressure in the refrigerant circuit exceeds the operating limit, the heat pump is switched off for 15 minutes and is then restarted again. If the pressure remains too high after four unsuccessful restarts, the fault message F.731 is displayed.

S.303 Compressor outlet temperature too high

The operating characteristics have been exited. The heat pump is restarted.

S.304 Evaporation temperature too low

The operating characteristics have been exited. The heat pump is restarted.

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52 Installation and maintenance instructions Hydraulic station 0020257319_02

Statuscode Meaning

S.305 Condensation temperature too low

The operating characteristics have been exited. The heat pump is restarted.

S.306 Evaporation temperature too high

The operating characteristics have been exited. The heat pump is restarted.

S.308 Condensation temperature too high

The operating characteristics have been exited. The heat pump is restarted.

S.312 Building circuit: Return temperature too low

Return temperature in the building circuit too low for compressor to start. Heating: Return temperature < 5 °C. Cooling: Return temperature < 10 °C. Heating: Check that the 4-port diverter valve works correctly.

S.314 Building circuit: Return temperature too high

Return temperature in the building circuit too high for the compressor to start. Heating: Return temperature > 56 °C. Cooling: Return temperature > 35 °C. Cooling: Check that the 4-port diverter valve works correctly. Check the sensors.

S.351 Immersion heater: Flow temp. too high

The flow temperature at the immersion heater is too high. Flow temperature > 75 °C. The heat pump is switched off.

S.516 De-icing mode active The heat pump de-ices the outdoor unit's heat exchanger. The heating mode is interrupted. The max-

imum de-icing time is 16 minutes.

S.575 Frequency converter: Internal fault

An internal electronics fault is present on the outdoor unit's inverter PCB. If this occurs three times, fault message F.752 appears.

S.581 Connection fault: Frequency converter not recognised

Missing communication between the frequency converter and the outdoor unit's PCB. After this occurs three times, fault message F.753 appears.

S.590 Fault: 4-port valve position not correct

The 4-port diverter valve does not move fully to the heating or cooling position.

G Maintenance messages

Code Meaning Cause

Remedy

M.23 Status external current anode – External current anode not recog-

nised

– If required, check for a cable break

M.32 Building circuit: Pressure low – Pressure loss in the building circuit

due to leakages or air pockets

– Building circuit pressure sensor is

defective

– Check the building circuit for leaks,

top up with heating water and purge

– Check the plug contact on the PCB

and on the cable harness; check that the pressure sensor is working correctly and, if required, replace the pressure sensor

M.200 Building circuit 2: Low pressure – Pressure loss in the building circuit

due to leakages or air pockets

– Building circuit pressure sensor is

defective

– Check the building circuit for leaks,

top up with heating water and purge

– Check the plug contact on the PCB

and on the cable harness; check that the pressure sensor is working correctly and, if required, replace the pressure sensor

M.201 Sensor fault: Cylinder temperature – Cylinder temperature sensor defect-

ive

– Check the plug contact on the PCB

and on the cable harness; check that the sensor is working correctly and, if required, replace the sensor

M.202 Sensor fault: System temperature – System temperature sensor defective – Check the plug contact on the PCB

and on the cable harness; check that the sensor is working correctly and, if required, replace the sensor

M.203 Connection fault: Disp. not recog-

nised

– Display defective – Display not connected

– Check the quality of the plug contact

on the PCB and on the cable harness

– Replace the display, if required

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Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 53

H Comfort protection mode

Code Meaning Description Remedy

200 Sensor fault: Temp. air inlet Still possible to operate with existing,

functional outdoor temperature sensor

Replace the air inlet sensor

I Fault codes

In the event of faults which are caused by components in the refrigerant circuit, inform customer service.

Code Meaning Cause

Remedy

F.022 Water pressure too low – Pressure loss in the building circuit

due to leakages or air pockets

– Building circuit pressure sensor

defective

– Check the building circuit for leaks – Top up with water, purge – Check the quality of the plug contact

on the PCB and on the cable harness

– Check that the pressure sensor is

working correctly

– Replace the pressure sensor

F.042 Fault: Coding resistor – Coding resistor damaged or not set – Check that the coding resistor is

positioned correctly and, if required, replace it.

F.073 Sensor fault: Build. circ. pressure – The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.514 Sensor fault: Compr. inlet temp.

– The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.517 Sensor fault: Compr. outlet temp. – The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.519 Sensor fault: Building circuit re-

turn temp.

– The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.520 Sensor fault: Building circuit flow

temp.

– The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.526 Sensor fault: EEV outlet temp. – The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.546 Sensor fault: High pressure – Sensor not connected or sensor

input has short-circuited

– Check the sensor (e.g. using an in-

stallation aid), and replace if necessary

– Replace the cable harness

F.582 Fault: EEV – EEV is not connected correctly or

there is a cable break to the coil

– Check the plug connections and, if

required, replace the coil from the EEV

F.585 Sensor fault: Capac. outlet temp. – The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

F.718 Fan unit 1: Fan blocked – There is no confirmation signal stat-

ing that the fan is rotating

– Check the air route and, if required,

remove any blockages

F.729 Compressor outlet temperature

too low

– The compressor outlet temperature

is lower than 0 °C for more than 10 minutes or the compressor outlet temperature is lower than -10 °C even though the heat pump is in the operating characteristics.

– Checking the high-pressure sensor – Checking that the EEV is working

correctly

– Checking for condensate leaking

from the temperature sensor (undercooling)

– Check whether the 4-port diverter

valve is in the intermediate position

– Checking the refrigerant volume for

overfilling

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Appendix

54 Installation and maintenance instructions Hydraulic station 0020257319_02

Code Meaning Cause

Remedy

F.731 High-pressure switch open – Refrigerant pressure too high. The

integrated high-pressure switch in the outdoor unit has tripped at

41.5 bar (g) or 42.5 bar (abs)

– Insufficient energy output via the

condenser

– Purging the building circuit – Too low a volume flow as a result

of closing single room controls in an underfloor heating system

– Check that the dirt filter that is in

place is permeable

– Refrigerant flow rate too low (e.g.

electronic expansion valve defective, 4-port diverter valve is mechanically blocked, filter is blocked). Inform customer service.

– Cooling mode: Check the fan unit for

dirt

– Check the high-pressure switch and

high-pressure sensor

F.732 Compressor outlet temperature

too high

The compressor outlet temperature is above 130 °C:

– Application limits exceeded – EEV does not work or does not open

correctly

– Refrigerant volume too low (frequent

defrosting due to extremely low evaporation temperatures)

– Check the compressor inlet sensor

and outlet sensor

– Check the compressor outlet temper-

ature sensor (TT135)

– Check the EEV (does the EEV

move to the limit stop? Use the sensor/actuator test)

– Check the refrigerant volume (see

Technical data)

– Carry out a leak-tightness test – Check whether the service valves on

the outdoor unit are open.

F.733 Evaporation temperature too low – Insufficient air volume flow through

the outdoor unit's heat exchanger (heating mode) leads to an insufficient energy input in the environment circuit (heating mode) or building circuit (cooling mode)

– Refrigerant volume too low

– If the building circuit contains ther-

mostatic valves, check that they are suitable for cooling mode (check volume flow in cooling mode)

– Check the fan unit for dirt – Check the EEV (does the EEV

move to the limit stop? Use the sensor/actuator test)

– Check the compressor inlet sensor – Check the refrigerant volume

F.734 Condensation temperature too low – The temperature in the heating

circuit is too low, outside of the operating characteristics

– Refrigerant volume too low

– Check the EEV (does the EEV

move to the limit stop? Use the sensor/actuator test)

– Check the compressor inlet sensor – Check the refrigerant filling volume

(see technical data)

– Check whether the 4-port diverter

valve is in an intermediate position and is not correctly switched

– Checking the high-pressure sensor – Check the pressure sensor in the

heating circuit

F.735 Evaporation temperature too high – Temperature in the environment

circuit (heating mode) or building circuit (cooling mode) too high for compressor operation

– Feed-in of external heat into the

environment circuit due to increased fan speed

– Check the system temperatures – Check the refrigerant filling volume

for overfilling

– Check the EEV (does the EEV

move to the limit stop? Use sensor/actuator test)

– Check the sensor for the evaporation

temperature (depending on the position of the 4-port diverter valve)

– Check the volume flow in cooling

mode

– Check the air volume flow in heating

mode

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Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 55

Code Meaning Cause

Remedy

F.737 Condensation temperature too

high

– Temperature in the environment

circuit (cooling mode) or building circuit (heating mode) too high for compressor operation

– Feed-in of external heat into the

building circuit

– Refrigerant circuit overfilled – Insufficient flow rate in the building

circuit

– Reduce or stop the external heat

that is entering

– Check the back-up heater (heats

up even though it is off in the sensor/actuator test?)

– Check the EEV (does the EEV

move to the limit stop? Use the sensor/actuator test)

– Check the compressor outlet sensor,

compressor outlet temperature sensor (TT135) and high pressure sensor

– Check the refrigerant filling volume

for overfilling

– Check whether the service valves on

the outdoor unit are open.

– Check the air volume flow in cooling

mode for sufficient flow rate

– Checking the heating pump – Check the building circuit flow rate

F.741 Building circuit: Return temp. too

low

– During the de-icing, the return tem-

perature falls below 13 °C

– Ensure the minimum installation

volume is maintained; if required, install a series return cylinder

– The fault message is displayed until

the return temperature increases to above 20 °C.

– Activate the electric back-up heater

in the product's control panel and in the system control in order to increase the return temperature. The compressor is blocked while the fault message is present.

F.752 Fault: Frequency converter – Internal electronics fault on the in-

verter PCB

– Mains voltage outside of 70 V–282 V

– Check the integrity of the power sup-

ply cables and compressor connection cables

The plugs must audibly click into place.

– Check the cable – Check the mains voltage

The mains voltage must be between 195 V and 253 V.

– Check the phases – Replace the frequency converter, if

required

F.753 Connection fault: Freq. conv.

n.recogn.

– Missing communication between the

frequency converter and the outdoor unit's control PCB

– Check the integrity of the cable

harness and plug connection and, if required, replace them

– Check the frequency converter by

actuating the compressor safety relay

– Read the assigned parameters for

the frequency converter and check whether values are displayed

F.755 Fault: 4-port valve position not

correct

– Incorrect position of the 4-port di-

verter valve. If, in heating mode, the flow temperature is lower than the return temperature in the building circuit.

– The temperature sensor in the elec-

tronic expansion valve environment circuit displays an incorrect temperature.

– Check the 4-port diverter valve (is an

audible switching available? Use the sensor/actuator test)

– Check that the coil is positioned

correctly on the 4-port valve

– Check the cable harness and plug

connections

– Check the temperature sensor in the

electronic expansion valve environment circuit

F.774 Sensor fault: Air inlet temp. – The sensor is not connected or the

sensor input has short-circuited

– Check and, if required, replace the

sensor

– Replace the cable harness

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56 Installation and maintenance instructions Hydraulic station 0020257319_02

Code Meaning Cause

Remedy

F.785 Fan unit 2: Fan blocked – There is no confirmation signal stat-

ing that the fan is rotating

– Check the air route and, if required,

remove any blockages

F.788 Building circuit: Pump fault – The electronics system of the high-

efficiency pump has detected a fault (e.g. dry running, blockage, overvoltage, undervoltage) and has switched off and locked the pump.

– Switch the heat pump off for at least

30 seconds (no current)

– Check the quality of the plug contact

on the PCB

– Check that the pump functions cor-

rectly

– Purging the building circuit – Check that the dirt filter that is in

place is permeable

F.817 Freq. converter fault: Compressor – Defect in the compressor (e.g. short

circuit)

– Defect in the frequency converter – Connection cable to the compressor

is defective or loose

– Measure the winding resistance in

the compressor

– Measure the frequency converter

output between the three phases, (it must be > 1 kΩ)

– Check the cable harness and plug

connections

F.818 Freq. converter fault: Mains

voltage

– Incorrect mains voltage for operating

the frequency converter

– Shutdown via the energy supply

company

– Measure and, if required, correct the

mains voltage

The mains voltage must be between 195 V and 253 V.

F.819 Freq. converter fault: Overheating – Internal overheating of the frequency

converter

– Allow the frequency converter to cool

and restart the product

– Check the frequency converter's air

route

– Check that the fan is working cor-

rectly

– The maximum environmental tem-

perature of the outdoor unit (46 °C) has been exceeded.

F.820 Connection fault: Building circuit

pump

– Pump does not report any signal

back to the heat pump

– Check the cable to the pump for

defects and, if required, replace it

– Replace the pump

F.821 Sensor fault: Immers. heater flow

temp.

– The sensor is not connected or the

sensor input has short-circuited

– Both of the flow temperature sensors

in the heat pump are defective

– Check and, if required, replace the

sensor

– Replace the cable harness

F.823 Hot gas temperature switch open – The hot gas thermostat shuts down

the heat pump if the temperature in the refrigerant circuit is too high. Following a waiting period, the heat pump attempts to start once more. After three failed start attempts in succession, a fault message is displayed.

– Max. refrigerant circuit temperature:

130 °C

– Waiting period: 5 mins (after it first

occurs)

– Waiting period: 30 mins (after it

occurs a second time and any other time after that)

– The fault counter is reset if both of

the following conditions are met:

– Heat requirement without switch-

ing off prematurely

– 60 mins uninterrupted operation

– Check the EEV – Replace the dirt filter in the refrigera-

tion circuit, if required

F.825 Sensor fault: Capac. inlet temp. – Refrigerant circuit temperature

sensor (vapour-forming) not connected or the sensor input has shortcircuited

– Check and, if required, replace the

sensor and cable

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Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 57

Code Meaning Cause

Remedy

F.1100 Immersion heater: Safety cut-out

open

The safety cut-out on the electric backup heater is open due to:

– Insufficient volume flow or air in the

building circuit

– The immersion heater is operated

when the building circuit is not filled

– Immersion heater operation at flow

temperatures above 95 °C trips the safety fuse of the safety cut-out and requires that the fuse be replaced

– Feed-in of external heat into the

building circuit

– Check the circulation in the building

circuit pump

– If required, open the stopcocks – Replace the safety cut-out – Reduce or stop the external heat

that is entering

– Check that the dirt filter that is in

place is permeable

F.1117 Compressor: Phase failure – Defective fuse

– Incorrect electrical connections – Mains voltage too low – Compressor/low tariff power supply

not connected

– Blocked by energy supply company

for over three hours

– Check the fuse – Checking the electrical connections – Check the voltage at the heat pump

electrical connection

– Reduce energy supply company

anti-cycling time to under three hours

F.1120 Immersion heater: Phase failure – Electric back-up heater defective

– Poorly tightened electrical connec-

tions

– Mains voltage too low

– Check the electric back-up heater

and its power supply

– Check the electrical connections – Measure the voltage at the electrical

connection for the electric back-up heater

F.9998 Connection fault: Heat pump – eBUS cable not connected or con-

nected incorrectly

– Outdoor unit without supply voltage

– Check the connection pipes between

the power supply PCB and control PCB on the indoor and outdoor unit

J 5.4 kW back-up heater

Applies for products with a heat output of 5 kW and 7 kW

Internal control of the output levels

Power consumption Set value

0 0.0 kW

1 0.9 kW 1 kW

2 1.1 kW

3 1.7 kW

4 2.0 kW 2 kW

5 2.8 kW 3 kW

6 3.7 kW 4 kW

7 4.5 kW 5 kW

8 5.4 kW 6 kW

K 8.54 kW back-up heater at 230 V

Applies for products with a heat output of 12 kW

Internal control of the output levels at 230 V

Power consumption Set value

0 0.0 kW

1 0.7 kW 1 kW

2 1.2 kW

3 1.8 kW 2 kW

4 2.2 kW 3 kW

5 3.2 kW

6 3.8 kW 4 kW

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Appendix

58 Installation and maintenance instructions Hydraulic station 0020257319_02

Internal control of the output levels at 230 V

Power consumption Set value

7 4.7 kW 5 kW

8 5.4 kW 6 kW

L 8.54 kW back-up heater at 400 V

Applies for products with a heat output of 12 kW

Internal control of the output levels at 400 V

Power consumption Set value

0 0.0 kW

1 0.7 kW 1 kW

2 1.2 kW

3 1.8 kW 2 kW

4 2.3 kW

5 3.0 kW 3 kW

6 3.9 kW 4 kW

7 4.7 kW 5 kW

8 5.6 kW 6 kW

9 6.2 kW

10 7.0 kW 7 kW

11 7.9 kW 8 kW

12 8.5 kW 9 kW

M Inspection and maintenance work

# Maintenance work Interval

1 Checking the admission pressure of the expansion vessel Annually

2 Check that the prioritising diverter valve can move easily (visually/audibly) Annually

3 Checking the refrigerant circuit, removing rust and oil Annually

4 Checking the electronics boxes, removing dust from the ventilation slits Annually

5 Checking the vibration dampers on the refrigerant pipes Annually

N Characteristic values for the temperature sensor, refrigeration circuit

Sensors: TT125, TT135, TT610

Temperature (°C) Resistance (ohms)

-40 327344

-35 237193

-30 173657

-25 128410

-20 95862

-15 72222

-10 54892

-5 42073

0 32510

5 25316

10 19862

15 15694

20 12486

25 10000

Page 61

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 59

Temperature (°C) Resistance (ohms)

30 8060

35 6535

40 5330

45 4372

50 3605

55 2989

60 2490

65 2084

70 1753

75 1481

80 1256

85 1070

90 916

95 786

100 678

105 586

110 509

115 443

120 387

125 339

130 298

135 263

140 232

145 206

150 183

155 163

O Characteristic values for the internal temperature sensors, hydraulic circuit

Sensors: TT620 TT650

Temperature (°C) Resistance (ohms)

0 33400

5 25902

10 20247

15 15950

20 12657

25 10115

30 8138

35 6589

40 5367

45 4398

50 3624

55 3002

60 2500

65 2092

70 1759

75 1486

80 1260

85 1074

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Appendix

60 Installation and maintenance instructions Hydraulic station 0020257319_02

Temperature (°C) Resistance (ohms)

90 918

95 788

100 680

105 588

110 510

P Characteristic values for the VR10 internal temperature sensors, cylinder temper-

ature

Temperature (°C) Resistance (ohms)

-40 88130

-35 64710

-30 47770

-25 35440

-20 26460

-15 19900

-10 15090

-5 11520

0 8870

5 6890

10 5390

15 4240

20 3375

25 2700

30 2172

35 1758

40 1432

45 1173

50 966

55 800

60 667

65 558

70 470

75 397

80 338

85 288

90 248

95 213

100 185

105 160

110 139

115 122

120 107

125 94

130 83

135 73

140 65

145 58

150 51

Page 63

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 61

Q Characteristic values for the VRC DCF outdoor temperature sensor

Temperature (°C) Resistance (ohms)

-25 2167

-20 2067

-15 1976

-10 1862

-5 1745

0 1619

5 1494

10 1387

15 1246

20 1128

25 1020

30 920

35 831

40 740

R Technical data

Note

The following performance data is only applicable to new products with clean heat exchangers.

Technical data – General

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS

Product dimensions, width

440 mm 440 mm 440 mm

Product dimensions, height

720 mm 720 mm 720 mm

Product dimensions, depth

350 mm 350 mm 350 mm

Weight, without packaging

23 kg 24 kg 26.5 kg

Rated voltage

230 V (+10%/-15%),

50 Hz, 1~/N/PE

230 V (+10%/-15%),

50 Hz, 1~/N/PE

230 V (+10%/-15%),

50 Hz, 1~/N/PE

Rated voltage

400 V (+10%/-15%),

50 Hz, 3~/N/PE

400 V (+10%/-15%),

50 Hz, 3~/N/PE

400 V (+10%/-15%),

50 Hz, 3~/N/PE

Rated power, maximum

5.4 kW 5.4 kW 8.8 kW

Rated current, maximum

23.50 A (230 V), 14.50 A (400 V)

23.50 A (230 V) 14.50 A (400 V)

23.50 A (230 V), 14.00 A (400 V)

IP rating

IP 10B IP 10B IP 10B

Overvoltage category

II II II

Fuse type, characteristic C, slowblow, three-pole switching (disconnection of the three mains connection lines in one switching operation)

Design in accordance with the selected connection diagrams

Heating circuit connections

G 1" G 1" G 1"

Domestic hot water cylinder connections

G 1" G 1" G 1"

Page 64

Appendix

62 Installation and maintenance instructions Hydraulic station 0020257319_02

Technical data – Heating circuit

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS

Material in the heating circuit

Copper, copper-zinc

alloy, stainless steel,

ethylene propylene diene

monomer rubber, brass,

steel, composite

materials

Copper, copper-zinc

alloy, stainless steel,

ethylene propylene diene

monomer rubber, brass,

steel, composite

materials

Copper, copper-zinc alloy, stainless steel,

ethylene propylene diene

monomer rubber, brass,

steel, composite

materials

Permissible water composition

Without frost or corrosion

protection. Soften the

heating water at water

hardnesses from 3.0

mmol/l (16.8° dH)

according to Directive

VDI 2035 sheet 1.

Without frost or corrosion

protection. Soften the

heating water at water

hardnesses from 3.0

mmol/l (16.8° dH)

according to Directive

VDI 2035 sheet 1.

Without frost or corrosion

protection. Soften the

heating water at water

hardnesses from 3.0

mmol/l (16.8° dH)

according to Directive

VDI 2035 sheet 1.

Minimum operating pressure

0.05 MPa

(0.50 bar)

0.05 MPa

(0.50 bar)

0.05 MPa

(0.50 bar)

Maximum operating pressure

0.3 MPa

(3.0 bar)

0.3 MPa

(3.0 bar)

0.3 MPa

(3.0 bar)

Min. heating mode flow temperature

20 ℃ 20 ℃ 20 ℃

Max. heating mode flow temperature with compressor

55 ℃ 55 ℃ 55 ℃

Max. heating mode flow temperature with back-up heater

75 ℃ 75 ℃ 75 ℃

Min. cooling mode flow temperature

7 ℃ 7 ℃ 7 ℃

Max. flow temperature in cooling mode

25 ℃ 25 ℃ 25 ℃

Min. nominal volume flow with 3 kW outdoor unit

0.3 m³/h

Min. nominal volume flow with 5 kW outdoor unit

0.4 m³/h

Minimum nominal volume flow rate

0.55 m³/h

Nominal volume flow ΔT 5 K with 3 kW outdoor unit

0.54 m³/h

Nominal volume flow ΔT 5 K with 5 kW outdoor unit

0.79 m³/h

Nominal volume flow ΔT 5 K

1.02 m³/h

Nominal volume flow ΔT 5 K with 10 kW outdoor unit

1.70 m³/h

Nominal volume flow ΔT 5 K with 12 kW outdoor unit

1.80 m³/h

Nominal volume flow ΔT 8 K with 3 kW outdoor unit

0.3 m³/h

Nominal volume flow ΔT 8 K with 5 kW outdoor unit

0.4 m³/h

Nominal volume flow ΔT 8 K

0.55 m³/h

Nominal volume flow ΔT 8 K with 10 kW outdoor unit

1.13 m³/h

Nominal volume flow ΔT 8 K with 12 kW outdoor unit

1.18 m³/h

Remaining feed head ΔT 5 K with 3 kW outdoor unit

71 kPa

(710 mbar)

Remaining feed head ΔT 5 K with 5 kW outdoor unit

68 kPa

(680 mbar)

Remaining feed head ΔT 5 K

66 kPa

(660 mbar)

Remaining feed head ΔT 5 K with 10 kW outdoor unit

54 kPa

(540 mbar)

Page 65

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 63

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS

Remaining feed head ΔT 5 K with 12 kW outdoor unit

51.5 kPa

(515.0 mbar)

Remaining feed head ΔT 8 K with 3 kW outdoor unit

71 kPa

(710 mbar)

Remaining feed head ΔT 8 K with 5 kW outdoor unit

68 kPa

(680 mbar)

Remaining feed head ΔT 8 K

73 kPa

(730 mbar)

Remaining feed head ΔT 8 K with 10 kW outdoor unit

82 kPa

(820 mbar)

Remaining feed head ΔT 8 K with 12 kW outdoor unit

81 kPa

(810 mbar)

Min. volume flow during continuous operation at the operating limits with a 3 kW outdoor unit

0.3 m³/h

Min. volume flow during continuous operation at the operating limits with a 5 kW outdoor unit

0.4 m³/h

Min. volume flow during continuous operation at the operating limits

0.55 m³/h

Min. volume flow during continuous operation at the operating limits with a 10 kW outdoor unit

1.13 m³/h

Min. volume flow during continuous operation at the operating limits with a 12 kW outdoor unit

1.18 m³/h

Max. volume flow during continuous operation at the operating limits with a 3 kW outdoor unit

0.54 m³/h

Max. volume flow during continuous operation at the operating limits with a 5 kW outdoor unit

0.79 m³/h

Max. volume flow during continuous operation at the operating limits

1.08 m³/h

Max. volume flow during continuous operation at the operating limits with a 10 kW outdoor unit

1.7 m³/h

Max. volume flow during continuous operation at the operating limits with a 12 kW outdoor unit

1.8 m³/h

Pump type

High-efficiency pump High-efficiency pump High-efficiency pump

Energy efficiency index (EEI) of the pump

≤0.2 ≤0.2 ≤ 0.23

Technical data – Electrics

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS

Min. electrical power consumption of the heating pump

2 W 2 W 3 W

Max. electrical power consumption of the heating pump

60 W 60 W 100 W

Electrical power consumption of the heating pump at A7/35 Δ T 5 K with an external pressure loss of 250 mbar in the heating circuit

20 W 20 W 40 W

Technical data – Refrigerant circuit

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS

Material, refrigerant pipe

Copper Copper Copper

Length, refrigerant pipe, maximum

25 m 25 m 25 m

Page 66

Appendix

64 Installation and maintenance instructions Hydraulic station 0020257319_02

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS

Length, refrigerant pipe, minimum

3 m 3 m 3 m

Connection technology, refrigerant pipe

Flare connection Flare connection Flare connection

Outer diameter, hot gas pipe

1/2 " (12.7 mm) 5/8 " (15.875 mm) 5/8 " (15.875 mm)

Outer diameter, liquid pipe

1/4 " (6.35 mm) 3/8 " (9.575 mm) 3/8 " (9.575 mm)

Minimum wall thickness, hot gas pipe

0.8 mm 0.95 mm 0.95 mm

Minimum wall thickness, liquid pipe

0.8 mm 0.8 mm 0.8 mm

Refrigerant, type

R410A R410A R410A

Refrigerant, Global Warming Potential (GWP)

2088 2088 2088

Refrigerant, fill quantity

1.50 kg 2.39 kg 3.60 kg

Permissible operating pressure, maximum

41.5 bar 41.5 bar 41.5 bar

Compressor, type

Rotary piston Rotary piston Rotary piston

Compressor, oil type

Specific polyvinyl ether

(PVE)

Specific polyvinyl ether

(PVE)

Specific polyvinyl ether

(PVE)

Compressor, control

Electronic Electronic Electronic

Permissible height difference between outdoor unit and indoor unit

≤ 10 m ≤ 10 m ≤ 10 m

Page 67

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 65

S Commissioning Checklist

Applicability: Great Britain

Page 68

Appendix

66 Installation and maintenance instructions Hydraulic station 0020257319_02

This Commissioning Checklist is to be completed in full by the competent person who commissioned the heat pump and associated equipment as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.

Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.

AIR TO WATER HEAT PUMP COMMISSIONING CHECKLIST

Customer name: Telephone number:

Address:

Heat Pump Make and Model

Heat Pump Serial Number

Commissioned by (PRINT NAME): &HUWL¿HG2SHUDWLYH5HJ1R>@

Company name: Telephone number:

Company address:

Commissioning date:

%XLOGLQJ5HJXODWLRQV1RWL¿FDWLRQ1XPEHULIDSSOLFDEOH>@

CONTROLS - SYSTEM AND HEAT PUMP (tick the appropriate boxes)

Time and temperature control to heating

Room thermostat and programmer/timer Programmable Roomstat

Load/weather compensation 2SWLPXPVWDUWFRQWURO

Time and temperature control to hot water Cylinder thermostat and programmer/timer Combined with Heat pump main controls

+HDWLQJ]RQHYDOYHVLQFOXGLQJXQGHUÀRRUORRSV Fitted Not required

Hot water zone valves Fitted Not required

Thermostatic radiator valves Fitted Not required

+HDW3XPS6DIHW\,QWHUORFN>@ Built In Provided

2XWGRRU6HQVRU Fitted Not required

Automatic bypass to system Fitted Not required

Buffer Vessel Fitted Yes No If YES Volume: Litres

ALL SYSTEMS

7KHKHDWLQJV\VWHPKDVEHHQ¿OOHGDQGSUHVVXUHWHVWHG Yes

([SDQVLRQYHVVHOIRUKHDWLQJLVVL]HG¿WWHGFKDUJHGLQDFFRUGDQFHZLWKPDQXIDFWXUHU¶VLQVWUXFWLRQV Yes

7KHKHDWSXPSLV¿WWHGRQDVROLGVWDEOHVXUIDFHFDSDEOHRIWDNLQJLWVZHLJKW Yes

7KHV\VWHPKDVEHHQÀXVKHGDQGFOHDQHGLQDFFRUGDQFHZLWK%6DQGKHDWSXPSPDQXIDFWXUHU¶VLQVWUXFWLRQV Yes

What system cleaner was used?

What inhibitor was used? Quantity litres

Is the system adequately frost protected? Yes

OUTDOOR UNIT

Are all external pipeworks insulated? Yes

Is the fan free from obstacles and operational? Yes

Has suitable consideration been made for waste water discharge? Yes

CENTRAL HEATING MODE

Heating Flow Temperature °C Heating Return Temperature °C

DOMESTIC HOT WATER MODE Measure and Record:

Is the heat pump connected to a hot water cylinder? Unvented Vented Thermal Store Not Connected

Hot water has been checked at all outlets Yes +DYH7KHUPRVWDWLF%OHQGLQJ9DOYHVEHHQ¿WWHG" Yes Not required

ADDITIONAL SYSTEM INFORMATON

Additional heat sources connected: Gas Boiler 2LO%RLOHU Electric Heater Solar Thermal 2WKHU

ALL INSTALLATIONS

The heating, hot water and ventilation systems complies with the appropriate Building Regulations Yes

All electrical work complies with the appropriate Regulations Ye s

The heat pump and associated products have been installed and commissioned in accordance with the manufacturer’s instructions Yes

The operation of the heat pump and system controls have been demonstrated to the customer Yes

The manufacturer’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes

Commissioning Engineer’s Signature

Customer’s Signature

7RFRQ¿UPVDWLVIDFWRU\GHPRQVWUDWLRQDQGUHFHLSWRIPDQXIDFWXUHU¶VOLWHUDWXUH

1RWHV>@,QVWDOOHUVVKRXOGEHPHPEHUVRIDQDSSURSULDWH&RPSHWHQW3HUVRQV6FKHPH>@$OOLQVWDOODWLRQVLQ(QJODQGDQG :DOHVPXVWEHQRWL¿HGWR/RFDO$UHD%XLOGLQJ&RQWURO/$%&HLWKHUGLUHFWO\RUWKURXJKD&RPSHWHQW3HUVRQV6FKHPH$ %XLOGLQJ5HJXODWLRQV&RPSOLDQFH&HUWL¿FDWHZLOOWKHQEHLVVXHGWRWKHFXVWRPHU>@0D\EHUHTXLUHGIRUV\VWHPVFRYHUHG E\*5HJXODWLRQV

www.centralheating.co.uk

Page 69

Appendix

0020257319_02 Hydraulic station Installation and maintenance instructions 67

It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.

Service Provider

Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.

$OZD\VXVHWKHPDQXIDFWXUHU¶VVSHFL¿HGVSDUHSDUWZKHQUHSODFLQJFRQWUROV

SERVICE RECORD

SERVICE 01

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 03

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 05

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 07

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 09

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 02

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 04

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 06

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 08

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

SERVICE 10

Date:

Engineer name:

Company name:

Telephone No:

2SHUDWLYH,'1R

Comments:

Signature

Page 70

Index

68 Installation and maintenance instructions Hydraulic station 0020257319_02

Index

Actuator test ........................................................................37

Back-up heater .................................................................... 30

Basic diagram...................................................................... 16

Calling up, code layer.......................................................... 37

Calling up, installer level...................................................... 37

Calling up, statistics.............................................................37

CE marking.......................................................................... 22

Check programmes

Use ................................................................................37

Checking, electrical installation ........................................... 33

Checking, filling pressure, heating installation .................... 41

Checking, high-pressure switch-off .....................................41

Checking, maintenance message .......................................40

Checking, service message ................................................ 40

Circulation pump, connecting .............................................. 32

Code layer, calling up.......................................................... 37

Comfort protection mode ..................................................... 40

Competent person...............................................................16

Competent person telephone number................................. 36

Connecting, circulation pump .............................................. 32

Cylinder connection.............................................................27

Data plate ............................................................................ 21

Disposal, accessories.......................................................... 42

Disposal, packaging ............................................................42

Disposal, product................................................................. 42

Disposing of the packaging ................................................. 42

Documents .......................................................................... 19

Electric back-up heater........................................................ 37

Electrical installation, checking............................................ 33

Electricity .............................................................................16

Expansion relief valve ......................................................... 27

Fault codes ..........................................................................39

Fault list, deleting ................................................................39

Fault memory ...................................................................... 39

Fault memory, deleting ........................................................ 39

Fault symbol ........................................................................ 37

Filling and purging ...............................................................35

Filling pressure

Reading .........................................................................38

Filling pressure, checking, heating installation .................... 41

Flow temperature, setting, heating mode ............................ 39

Freeze protection ................................................................ 19

Frost .................................................................................... 17

Frost protection function ...................................................... 19

Heating circuit connections ................................................. 27

High-pressure switch-off...................................................... 41

Hot water temperature......................................................... 17

Inspection ............................................................................40

Inspection work ................................................................... 41

Installation assistant .......................................................... 36

Restart ........................................................................... 37

Installation assistant, ending ............................................... 36

Installation clearances.........................................................24

Installer level, calling up ...................................................... 37

Intended use........................................................................ 16

Language ............................................................................36

Live Monitor .........................................................................39

Low-water pressure protection ............................................ 19

Maintenance........................................................................ 40

Maintenance message, checking ........................................ 40

Maintenance work ...............................................................41

Minimum clearances ........................................................... 24

Operating concept ............................................................... 38

Operating mode................................................................... 39

Parameters

Reset .............................................................................39

Power supply .......................................................................28

Pre-charge pressure of expansion vessel

Checking........................................................................ 41

Preparing

Repair ............................................................................ 40

Product

Switching on .................................................................. 36

Pump blocking protection .................................................... 19

Qualification.........................................................................16

Refrigerant...........................................................................18

Regulations .........................................................................18

Remaining feed head of the product ................................... 38

Repair

Preparing ....................................................................... 40

Resetting

All parameters................................................................ 39

Risk of scalding ................................................................... 17

Safety cut-out ......................................................................20

Safety device .......................................................................16

Screed-drying function

Activating the screed-drying function............................. 33

Sensor test ..........................................................................37

Service message, checking................................................. 40

Service number, saving ....................................................... 36

Service partner .................................................................... 39

Setting, flow temperature, heating mode............................. 39

Spare parts ..........................................................................40

Starting

Installation assistant ......................................................37

Statistics, calling up ............................................................. 37

Status codes........................................................................ 39

Test menu ........................................................................... 37

Test operation ..................................................................... 41

Tool .....................................................................................18

Transport .............................................................................16

Treating the heating water...................................................34

Use

Check programmes .......................................................37

Page 71

Index

0020257319_02 Hydraulic station Installation and maintenance instructions 69

Voltage ................................................................................ 16

Weight ................................................................................. 24

Wiring .................................................................................. 32

Page 72

0020257319_02 12.11.2018

Supplier

Vaillant Ltd.

Nottingham Road

Belper 1 1 Derbyshire 1 1 DE56 1JT

Telephone 0330 100 3461

[email protected]

www.vaillant.co.uk

0020257319_02