Vaillant VWS 36/4.1 230V geoTHERM Brine/Water Heat Pump Instruction Manual

Vaillant VWS 36/4.1 230V geoTHERM Brine/Water Heat Pump

Product Description

The geoTHERM VWS 36/4.1 230V is a heat pump product manufactured by Vaillant GmbH. The product has safety devices to ensure safeoperation, and it is designed to function efficiently. The product comes with a data plate and CE label for easy identification. There are product stickers that provide additional information about the product.

Set-up

Before installing the heat pump, ensure that the packaging is removed, and the scope of delivery is checked. Select an appropriate installation site with minimum clearances specified in the manual. Use the mounting template to wall- mount the product with proper dimensions. Remove the front and side casing, and transport locks as required.

Hydraulics Installation

The hydraulics installation should be carried out as specified in the manual. Ensure that the heating circuit meets the requirements, and connect the heat pump to the heating circuit and brine circuit. Route the drain pipework of the expansion relief valve and fill and purge both heating and brine circuits.

Electrical Installation

The electrical installation should be carried out as specified in the manual. Route eBUS lines, open the electronics box, and follow the wiring diagrams provided.

Maintenance Instructions

Maintenance of the heat pump should be carried out regularly as specified in the manual. This includes checking safety devices, cleaning filters, and inspecting electrical connections. Any repairs or replacements should only be carried out by authorized personnel.

Safety

It is essential to follow all safety instructions provided in the manual. This includes action-related warnings and general safety information. The product should only be used for its intended use and in compliance with regulations, directives, laws, and standards.

Notes on the Documentation

It is important to observe all other applicable documents and store them safely. The instructions provided are valid at the time of publication.

Installation and maintenance instructions

geoTHERM
VWS 36/4.1 230V
Publisher/manufacturer Vaillant GmbH Berghauser Str. 40 D-42859 Remscheid Tel. +492191180 Fax +492191182810 info@vaillant.de www.vaillant.de

3

Safety

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 General safety information
1.2.1 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 instructions are provided in these operating instructions.
1.2.2 Risk caused by inadequate qualifications
Applicability: Not for Russia and Kazakhstan
OR Not for Russia
OR Not for Kazakhstan
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
Observe all instructions that are included with the product.
Proceed in accordance with current technology.
Observe all applicable directives, standards, laws and other regulations.
1.2.3 Risk of death due to lack of safety devices
The schematic drawings included in this document do not show all safety devices required for correct installation.
Install the necessary safety devices in the system.
Observe the applicable national and international laws, standards and guidelines.
1.2.4 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:
Unplug the mains plug. Or disconnect the product from the power
supply by switching off all power supplies (electrical partition with a contact 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 capacitors have discharged. Check that there is no voltage.
1.2.5 Danger due to malfunctions
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 damage that may affect safety.
Install the control in a location where it is not covered by furniture, curtains, or other objects.
If room temperature modulation is activated, be aware that, in the room where the control is mounted, all the radiator valves must be fully open.

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Installation and maintenance instructions geoTHERM 0020250181_00

Safety 1

Do not use the products’ free terminals as supporting terminals for other wiring.
At lengths of over 10 m, 230 V connection cables must be laid separately from sensor or bus lines.
1.2.6 Preventing the risk of injury from corrosive 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.
1.2.7 Preventing the risk of injury due to scalding from hot and cold components
Particularly in the refrigeration circuit, the components of the heat pump can reach high temperatures or extremely low temperatures.
Do not touch any uninsulated pipelines in any part of the heating installation.
Do not remove any casing sections. Do not touch the compressor, as it can
become extremely hot during operation. If the components have reached the envir-
onmental temperature, you can start work.
1.2.8 Risk of injury due to the heavy weight of the product
Make sure that the product is transported by at least two people.
1.2.9 Preventing the risk of injury from freezing as a result of touching refrigerant
The product is delivered with an operational filling of R410A refrigerant. This is a chlorine-free refrigerant which does not affect the Earth’s ozone layer. R410A is neither a fire hazard nor an explosion risk. 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 refrigerant.
In the event of skin or eye contact with the refrigerant, seek medical advice.
1.2.10 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 building circuit lines are cold, which means that condensate may also 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.
1.2.11 Material damage due to additives in the heating water
Unsuitable frost or corrosion protection agents may damage seals and other components of the heating circuit, and may therefore also cause water leaks.
Only add approved frost and corrosion protection agents to the heating water.
1.2.12 Damage to the building caused by missing isolator devices
Missing isolator devices may lead to damage to the building.
Install the isolator devices that are required in accordance with the installation standards.
1.2.13 Frost damage due to an unsuitable installation site
Frost poses a risk of damage to the product and the whole heating installation.
Even if rooms, or the whole flat, are not in use for certain periods, the heating must remain in operation.
Frost protection and monitoring devices are only active while the product is connected to the power supply. The product must be connected to the power supply.

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1 Safety

The heat pump itself does not have a frost protection function. For smooth operation of the refrigeration circuit, a minimum room temperature of 7 °C must be maintained. If the room temperature falls below 7 °C, this may lead to frost damage on the heat pump.
1.2.14 Frost damage caused by insufficient room temperature
If the room temperature is set too low in individual rooms, it cannot be ruled out that sections of the heating installation might be damaged by frost.
If you are going to be away during a cold period, ensure that the heating installation remains in operation and that the rooms are sufficiently heated.
You must observe the frost protection instructions.
1.2.15 Frost damage as a result of a power cut
If the power supply is cut, it is possible that parts of the heating installation may become damaged by frost.
If you want to use an emergency power generator to maintain the operational readiness of the product during a power cut, note the following:
Make sure that the technical values of this emergency power generator (frequency, voltage, earthing) match those of the power grid.
1.2.16 Material damage due to unsuitable installation surface
The installation surface must be even and have sufficient load-bearing capacity to support the operating weight of the product. An uneven installation surface may cause leaks in the product. If the installation surface does not have sufficient load-bearing capacity, the product may become detached and fall off. There is a risk of death if the connections are subject to leaks.
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.

1.2.17 Risk of material damage caused by using an unsuitable tool
Use the correct tool to tighten or loosen threaded connections.
1.2.18 Product fault as a result of incorrect system pressure
To avoid operating the system with too little water and thus prevent resulting damage, note the following:
Check the system pressure of the heating installation at regular intervals.
The system pressure instructions must be observed.
1.2.19 Avoid environmental damage caused by escaping refrigerant
The product contains R 410 A refrigerant. The 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 officially certified competent persons with appropriate protective equipment carry out maintenance work on the refrigerant circuit or access it.
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.
1.3 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 brine-to-water heat pump is designed for use as a heat generator for closed heating installations. The product is intended exclusively for domestic use as a heat generator for closed central heating installations. Operating the product outside the operating limits res-

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Installation and maintenance instructions geoTHERM 0020250181_00

ults in the product being switched off by the internal control and safety devices.
Intended use includes the following:
­ observance of accompanying operating, installation and maintenance instructions for the product and any other system components
­ installing and fitting the product in accordance with the product and system approval
­ compliance with all inspection and maintenance conditions listed in the instructions.
Intended use also covers installation in accordance with the IP class.
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.
1.4 Regulations (directives, laws, standards)
Observe the national regulations, standards, guidelines and laws.

Safety 1

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Notes on the documentation

2 Notes on the documentation
2.1 Observing other applicable documents
You must observe all the operating and installation in-
structions included with the system components.

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 succession, the unit is permanently shut down and displays a fault message.

2.2 Storing documents
Pass these instructions and all other applicable docu-
ments on to the system operator.

2.3 Validity of the instructions
These instructions apply to products with the following type designations and article numbers only:

Type designation VWS 36/4.1 230 V

Art. no. 0010022462

You can find the 10-digit article number for the heat
pump on the plate that is located behind the front flap. The seventh to sixteenth digits of the serial number on the data plate form the article number.

Product description

3.1 Safety devices
3.1.1 Frost protection function
The frost protection function for the system is controlled via the system control. If the system control fails, the heat pump guarantees limited frost protection for the heating circuit.
3.1.2 Protection against low heating water pressure
This function continuously monitors the pressure of the heating water in order to prevent a possible loss of heating water.
An analogue pressure sensor switches off the heat pump if the water pressure drops below the minimum pressure. It switches the heat pump on again if the water pressure reaches the operating pressure.
­ Minimum heating water pressure: 0.05 MPa ( 0.50 bar)
­ Heating water operating pressure: 0.07 MPa ( 0.70 bar)
3.1.3 Brine pressure detector
The brine loss protection system continuously monitors the fluid pressure in the environment circuit in order to prevent a possible shortage of fluid.
An analogue pressure sensor switches off the heat pump if the fluid pressure drops below the minimum pressure. It switches the heat pump on again if the fluid pressure reaches the operating pressure.
­ Minimum brine fluid pressure: 0.05 MPa ( 0.50 bar) ­ Brine fluid operating pressure: 0.07 MPa ( 0.70 bar)

3.1.5 Pump- and valve-blocking protection system
This function prevents the pumps for heating water and brine and all diverter valves from sticking. The pumps and the valves, which were out of operation for 23 hours, are switched on for 10 – 20 seconds, one after the other.
3.1.6 High-pressure pressure switch in the refrigeration circuit
The high-pressure pressure switch shuts down the heat pump if the pressure in the refrigeration circuit is too high.
If the pressure in the heat pump’s refrigeration circuit exceeds the maximum pressure, the high-pressure pressure switch temporarily shuts down the heat pump. Following a waiting period, another attempt is made to start the heat pump. After eleven failed start attempts in succession, a fault message is displayed.
­ Max. refrigeration circuit pressure: 4.15 MPa (g) (41.50 bar (g))
­ 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
3.1.7 Pressure sensor in the heating circuit and brine circuit
The heating circuit and brine circuit each have a pressure sensor which measures the actual pressure.
The pressure can be read in the heat pump’s display. If the pressure in either of the circuits falls below the minimum operating pressure, a fault message is shown in the heat pump’s display.
­ Heating water operating pressure: 0.07 MPa ( 0.70 bar)
­ Brine fluid operating pressure: 0.07 MPa ( 0.70 bar)

3.1.4 Freeze protection
This function prevents the evaporator from freezing when the heat source temperature drops below a certain value.

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Installation and maintenance instructions geoTHERM 0020250181_00

3.2 Design and functionality of the product

3.2.1 Design

19

1

2

18

17 16 15 14

13 3
12 4

5

11

Product description 3
1 2 3 4
5 6 7 8
9

1 Removable hood 2 Front casing 3 Operating panel
7

10

1 Condenser

2 Compressor outlet

temperature sensor

4 Plate with serial number 3 Rotary piston com-

on the rear

pressor

5 Front flap

4 High-pressure pressure switch

5 High-pressure sensor

6 Relay PCB

7 Heating pump

8 Flow rate sensor

9 Switch box

10 Heating circuit expansion relief valve

11 Brine circuit pressure sensor
12 Brine mixer
13 Brine pump
14 Refrigerant collector
15 Low-pressure sensor
16 Electronic expansion valve
17 Compressor inlet temperature sensor
18 Evaporator
19 Purging valves

6

5

43

1 Cable feedthrough for electrical connections
2 Heating return
3 Heating flow
4 Expansion relief valve drain hose

2

1

5 From the heat pump to the heat source (cold brine)
6 From the heat source to the heat pump (hot brine)
7 Data plate

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3 Product description

3.2.2 Functionality 3.2.2.1 Heat pump

8

9

10

7

6

3 21

4 5

Information on the data plate
B0/W35
B0/W55
Volt Hz W IP

Meaning
Heating output at a brine temperature of 0 °C and heating flow temperature of 35 °C Heating output at a brine temperature of °C and heating flow temperature of 55 °C Mains voltage
Mains frequency
Power consumption
Protection class
Information on disposal

Reading the operating and installation instructions

1 Heating pump
2 Condenser
3 Filter element
4 Electronic expansion valve
5 Printed circuit board

6 Evaporator 7 Brine pump 8 Brine mixer 9 Rotary compressor 10 Intermediate heat ex-
changer

The product is a brine-to-water heat pump and uses geothermal energy as a heat source.
The heat pump consists of the following separate circuits which are coupled with one another by means of heat exchangers. These circuits are:

­ The brine circuit, which extracts the thermal energy from the ground or the ground water and transfers this to the refrigeration circuit
­ The refrigerant circuit, which is used to bring the thermal energy from the ground to a usable, higher temperature level and deliver it to the heating circuit
­ The heating circuit, which is used to heat up the living rooms

3.4 Explanation of product stickers

Symbol on the sticker

Meaning Heating flow connection

Heating return connection

Connection from the heat source to the heat pump (hot brine)
Connection from the heat pump to the heat source (cold brine)
Brine heat source

3.3 Information on the data plate The data plate is mounted on the underside of the product.

Information on the data plate Serial no.
P max I max

Meaning
Unique unit identification number Measuring voltage of the compressor, pumps and controls
Maximum rated power Maximum in-rush current Refrigerant type, fill quantity, permissible rated overpressure

3.5 CE label
The CE label shows that the products comply with the basic requirements of the applicable directives as stated on the identification plate. The declaration of conformity can be viewed at the manufacturer’s site.

COP B0/W35 COP B0/W55

Output figure (coefficient of performance) at a brine temperature of 0 °C and heating flow temperature of 35 °C
Coefficient of performance at a brine temperature of 0 °C and heating flow temperature of 55 °C

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Installation and maintenance instructions geoTHERM 0020250181_00

Set-up

3.6 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.

4.3 Selecting the installation site
Select a dry room that is frost-proof throughout and
where the environmental temperature does not fall below 7 °C and does not exceed a maximum of 40 °C.
The installation room must have a minimum volume of
1.60 m³ at a refrigerant volume of 0.70 kg (R410A).
Ensure that the required minimum clearances can be
maintained.
Choose the installation site so that, where possible, vi-
brations that occur during operation are not transferred.
Ensure that the fastening is adapted to the circumstances
so that it can bear the weight of the heat pump.
­ Weight without packaging: 59 kg
In the case of walls with a mass per unit area of less than
200 kg/m2, lightweight construction walls and, in particular, dry-lined walls, use a mounting frame for the prewall installation of the heat pump in order to prevent vibrations and resulting noise emissions.
Secure the mounting frame to the wall only at floor and
ceiling level in order to minimise vibrations.
Ensure that cables can be easily routed (for brine, do-
mestic hot water and heating).
Use an open hopper for the drain hose on the expansion
relief valve in the heating circuit.
Ensure that there is an option to divert any condensate
that forms.

For more information visit www.centralheating.co.uk

4 Set-up
4.1 Removing the packaging
Carefully remove the packaging and padding without
damaging the parts of the product.
Note Remove the transport locks from the product only after it has been mounted on the wall or on the mounting frame.

4.2 Checking the scope of delivery
Check that the scope of delivery is complete.

Quantity Designation

1

Unit mounting bracket

1

Bag of small parts with fixing material

1

Heat insulation for the brine line

1

Heat pump

1

Installation set:

­ 4 x compression fitting ­ 2 x connection pipe (22 mm Cu) ­ 2 x seal with metal support ring for brine
circuit, ­ 2 x flat seal for heating circuit

1

Enclosed documentation

4.4 Transporting the heat pump
Warning. Risk of injury from lifting a heavy weight. The heat pump weighs 59 kg.
To prevent injuries, have several people
lift the heat pump.
Caution. Risk of damage due to improper transportation. Regardless of the mode of transport, the heat pump must never be tilted by more than 45°. Otherwise, this may lead to faults in the refrigerant circuit during subsequent operation. In the worst case scenario, this may lead to a fault in the whole system.
During transport, do not tilt the heat pump
by any more than the maximum angle of 45°.
1. Have two people lift the product on the frame. 2. Transport the product to the installation site.

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4 Set-up
3. Always transport the product as illustrated above. 4. Never transport the product as illustrated above.

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Installation and maintenance instructions geoTHERM 0020250181_00

4.5 Dimensions

440

426

Set-up 4

720 113
198

77 100

55 100

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4 Set-up
4.6 Minimum clearances
A

4.8 Wall-mounting the product
1

B 2
B

3

D C

The product is securely mounted on a wall.

Minimum clearance to the uniTOWER and domestic hot water cylinder

Minimum clearance to the MEH 60, MEH
61 and gas-fired wall-hung boiler

A

200 mm

B

300 mm

100 mm

C

500 mm

D

600 mm

Comply with the minimum clearances specified in order
to facilitate maintenance work.
If the product is mounted next to the uniTOWER accessory module, a clearance of 300 mm must be maintained.
If the product is mounted next to the MEH61/60 accessory module, a clearance of 100 mm must be maintained.

4.7 Using the mounting template
Note A mounting template is supplied with the product to aid wall mounting.

Danger! Risk of accidents as a result of insufficient load-bearing capacity of the fixing means.
If the fixing elements or wall do not have sufficient load-bearing capacity, the product may come loose and fall down. Brine fluid may leak from damaged lines.
When installing the product, ensure that
the fixing elements and the wall have sufficient load-bearing capacity.
Check the quality of the wall.
1. Use the minimum wall clearances ( Page 14) and the supplied mounting template to align the product.
2. Observe the requirements for the installation site ( Page 11).
3. Install the unit mounting bracket (1) on the wall or mounting frame using the rawl plugs and screws (2) provided.
4. Hang the product (3) on the unit mounting bracket from above using the hanging bracket.

1. Position the mounting template vertically over the installation site.
2. Attach the template to the wall, using tacks for example.
3. Mark the drill holes for the unit mounting bracket on the wall.

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Installation and maintenance instructions geoTHERM 0020250181_00

4.9 Removing the front casing
2

Hydraulics installation

4.11 Removing the transport locks
1. Remove the front casing as shown in the illustration. ( Page 15)
2. Remove the side casing. ( Page 15) 3. Remove the left- and right-hand transport locks (foam
pieces): ­ To the side below the refrigeration circuit platform. 4. Remove the transport lock (foam piece) from the front casing.

1
1. Undo the screw (1) on the underside of the product. 2. Push in the two retaining clips (2) on the underside of
the product so that the front casing is released. 3. Pull the front casing forwards at the bottom edge. 4. Lift the front casing up and out of the retainer. 4.10 Removing the side casing
3.

5 Hydraulics installation
Observe the relevant information about hydraulic installa-
tion in the appendix and in the system instructions.
5.1 Carrying out the hydraulics installation
Caution. Risk of damage caused by residue in the heating flow and return. Residue from the pipelines, such as welding beads, scale, hemp, putty, rust and coarse dirt, may be deposited in the heat pump and cause faults.
Flush the heating installation thoroughly
before connecting the heat pump in order to remove any possible residue.
Caution. Risk of damage caused by leaks. Mechanical stress on connection cables may cause leaks and damage to the product.
Avoid mechanical stress on connection
cables.

2. 1. 1. Remove both screws (1). 2. Pull the lower section of the side casing forwards. 3. Lift the side casing up to remove it.

1. Install the connection cables in accordance with the dimension and connection drawings.
2. Position the pipe brackets for securing the heating circuit and solar circuit piping so that they are not too close to the heat pump in order to prevent noise transmission.
Note The heat pump’s compressor has two-fold vibration insulation. This eliminates vibrations in the refrigeration circuit that are inherent in the system. However, under certain circumstances, residual vibrations may occur.
3. If required, instead of pipe brackets, use cold insulation brackets with additional rubber insulation and, in some cases, reinforced hoses (armoured rubber hoses).
4. To prevent excessive pressure losses on the heating water side, do not use stainless steel corrugated pipes.
5. Attach purging valves to the heating installation.

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15

5 Hydraulics installation

5.2 Requirements for the heating circuit
In heating installations that are equipped primarily with thermostatic or electrically controlled valves, a constant and sufficient flow through the heat pump must be ensured. Irrespective of which heating installation is selected, the minimum volume of circulating heating water (40% of the nominal volume flow, see the technical data table) must be guaranteed as the product does not have a bypass valve.
5.3 Connecting the heat pump to the heating circuit
Caution. Risk of damage from magnetite deposition.
In heating installations with steel pipes, static heating surfaces and/or buffer cylinder systems, magnetite may form where large volumes of water are involved.
Insert a magnetite filter to protect the
pump inside the product.
You must position the filter in direct prox-
imity to the return line to the heat pump.

1. Install the expansion relief valve hose in a frost-free environment and ensure that its routing ends in an open hopper where it is then visible.
2. Connect the heating flow to the heating flow connection of the heat pump.
3. Connect the heating return to the heating return connection of the heat pump.
4. Insulate all of the pipes in the heating circuit and the connections for the heat pump so that they are vapour diffusion-tight in order to prevent them from falling below the dew point in cooling mode.
5.4 Connecting the heat pump to the brine circuit

Caution. Risk of damage due to unsuitable frost and corrosion protection agents.
Unsuitable frost or corrosion protection agents may damage seals and other components and may therefore also cause leaks in the water outlet.
Only add permitted frost or corrosion pro-
tection agents to the heating water.
Observe the filling regulations.

A

1

B

1. Remove the blind caps (1) from the unit’s connections. These are no longer required and can be properly disposed of.
2. Connect the brine lines to the heat pump.
3. Connect the brine lines to connection “A” (hot brine) and “B” (cold brine) of the heat pump.
4. Install an automatic air separator in the brine circuit on the installation side.
5. Insulate all of the brine lines and the connections of the heat pump so that they are vapour diffusion-tight.

Caution.

5.5

In cooling mode, there is a risk of damage

caused by the temperature falling below

the dew point and by a build-up of con-

densation.

Radiator heating is not suitable for cooling mode with this product.

Ensure that the radiator heating is not
used for the cooling mode.

Routing the drain pipework of the expansion relief valve
Note The expansion relief valve for the heating installation is integrated into the product.

Warning. Risk of scalding caused by steam or hot water!
If there is overpressure, then steam and/or hot water is guided out via the drain hose of the expansion relief valve.
Have the hose end in such a way that
nobody is at risk when steam and/or hot water is drained.

1 1. Install a tundish for the expansion relief valve.

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Installation and maintenance instructions geoTHERM 0020250181_00

Hydraulics installation 5

­ Diameter of the tundish/discharge pipe: 32 mm ( 1.26 in)
2. Install the tundish in such a way that no cables or other electrical components can be damaged if there is a water leak.
­ The end of the line must be visible.

5.6 5.6.1

Filling and purging the heating circuit
Checking and treating the heating water/filling and supplementary water

Caution. Risk of material damage due to poor-quality heating water
Ensure that the heating water is of suffi-
cient quality.

Applicability: Great Britain

Total heating output

Water hardness at specific system volume1)

20 l/kW

20 l/kW 50 l/kW

50 l/kW

kW

ppm mol/ ppm mol/ ppm mol/ CaCO m³ CaCO m³ CaCO m³

< 50

< 300 < 3

200 2

2

0.02

50

200 2

to 200

150 1.5

2

0.02

200

150 1.5

2

0.02 2

0.02

to 600

600

2

0.02 2

0.02 2

0.02

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

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 magnet 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 during 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.

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 frost and cor-
rosion protection agents, 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.

0020250181_00 geoTHERM Installation and maintenance instructions

17

5 Hydraulics installation

5.6.2 Filling/refilling the heating installation
1. Open all of the thermostatic valves on the heating installation and, if required, all other isolation valves.
2. Check all of the connections and the entire heating installation for leaks.
3. To remove air pockets from the heating installation, use a filling pump to rinse the heating installation. To do this, fill the heat pump via the return line and allow the water to flow out via the flow line.
5.7 Filling and purging the brine circuit
5.7.1 Mixing the brine fluid
The brine fluid consists of water mixed with a concentrated antifreeze. The brine fluids that may be used differ greatly from region to region. For more information, contact the responsible authorities.
Only ethylene glycol in the specified ratio is authorised by Vaillant as a brine fluid for operating the heat pump.
Alternatively, suitable ready-mixed fluids for heat pumps can be ordered from Vaillant.
Carefully mix ethylene glycol with water.
­ Ratio of ethylene glycol to water: 3:7
This results in an aqueous solution with 30% vol.
ethylene glycol.
The brine fluid is protected against frost.
­ Frost protection for the brine fluid: -16 … -14
Check the mixture ratio of the brine fluid.
­ Working materials: Refractometer
5.7.2 Filling the brine circuit

71

42a

69

65

33

67 61

37

62

48

63

66

29
A B

71 Expansion vessel
A From the heat source to the heat pump (hot brine)

B From the heat pump to the heat source (cold brine)

1. Install a dirt filter (33) in the pressure line. 2. Connect the filling pump’s pressure line to the isolation
valve (61). 3. Close the isolation valve (63). 4. Open the isolation valve (61). 5. Connect a hose, which leads to the brine fluid, to the
isolation valve (62). 6. Open the isolation valve (62).

Caution. Risk of material damage caused by an incorrect filling direction.
If you fill the brine pump against the direction of flow, this may lead to a turbine effect which can damage the pump’s electronics.
Ensure that the brine pump is filled in the
direction of flow.

7. Use the filling pump (67) to pour the brine fluid from the brine container (66) into the brine circuit. ­ Brine fluid: Ethylene glycol/water ratio: 3/7
8. If you choke the filling pump, you can reduce the air ingress into the brine circuit.
5.7.3 Purge the brine circuit
1. Start up the filling pump (67) in order to fill and rinse the brine circuit.
2. Allow the filling pump (67) to run for at least 10 minutes in order to fill and rinse the circuit sufficiently.
3. Then close the isolation valves (61) and (62) and switch off the filling pump (67).
4. Open and close the purging valves (69) on the heat pump and check whether air is still escaping.
5. Purge the heat pump completely in order to prevent its functioning from being impaired by air in the brine circuit.
6. Place a silicone hose (5 mm diameter) on the purging valves and catch the brine fluid in a bucket.
7. If required, repeat this rinsing process. 8. Open the isolation valve (63).
5.7.4 Building up pressure in the brine circuit
1. Use the filling pump (67) to pressurise the brine circuit.

29 Brine pump
33 Dirt filter
37 Automatic air separator
42a Expansion relief valve
48 Pressure gauge (optional)
61 Stop valve

62 Stop valve
63 Stop valve
65 Brine collecting container
66 Brine container
67 Filling pump
69 Purging screws

Note To operate the brine circuit without any problems, a filling pressure of 0.15 MPa (1.5 bar) is required. The expansion relief valve opens at 0.3 MPa (3 bar).
2. Read off the pressure on the manometer.

18

Installation and maintenance instructions geoTHERM 0020250181_00

Electrical installation

­ Brine circuit operating pressure: 0.15 MPa (1.50 bar)
3. Build up the pressure in the brine circuit by using the filling pump to top up the brine fluid by opening the isolation valve (61).
4. Open the isolation valve (62) to allow any excess pressure to escape if it is above the required filling pressure of 0.15 MPa (1.5 bar) and below the expansion relief valve’s operating pressure of 0.3 MPa (3 bar).
5. Check the brine circuit’s filling pressure in the heat pump’s DIA system.
6. If required, repeat the process. 7. Remove the two hoses from the valves (61) and (62). 8. Purge the system once more after starting up the heat
pump. 9. Pass the vessel with the remaining brine fluid on to the
end user to be stored.
6 Electrical installation
6.1 Carrying out the electrical installation
1. Observe the relevant information about electrical installation in the appendix and in the system instructions.
Danger! Risk of electric shock!
Touching live connections may cause serious personal injury.
Before carrying out electrical installation
work, always pull the product’s mains plug out of the earthed plug socket.
Secure the power supply against being
switched back on.
Danger! Risk of death from electric shock as a result 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.
The electrical installation must be carried
out by a suitably qualified competent person who is responsible for complying with the existing standards and directives.

Strip the cable ends to a maximum of
10 mm.
Take care to wire up correctly.
2. When electrically connecting the product, observe the technical connection conditions for connecting to the power supply network operator’s low-voltage network.
3. Route low-voltage wires, such as sensor lines, on-site in the building so that there is sufficient clearance to 230 V lines. Minimum clearance for the low-voltage wire and power supply cable at a line length of > 10 m: 25 cm.
4. To establish the power supply, plug the heat pump’s mains plug into a suitable earthed plug socket. You must observe the notes ( Page 24)on this. ­ Make sure that the earthed plug socket for the heat pump is individually fused. The earthed plug socket must be freely accessible at all times following installation.
Note If one of the product’s power supply cables is damaged, you must replace it with a special connection cable that is available from the manufacturer or customer service.
5. Observe the maximum line length of the sensor lines. ­ Max. length of the sensor line: 50 m (164 ft 1 in)
6.2 Routing eBUS lines 1. Route the eBUS lines in a star formation from a junction
box to the individual products. 2. If several conductors are connected, use connection
terminals. 3. Ensure that you do not route the eBUS lines parallel to
the power supply cables. ­ Piping diameter: 0.75 mm²
6.3 Opening the electronics box
3

Caution. Material damage caused by short circuit.
A maximum of 10 mm of the insulation may be removed from the ends of lines that carry mains voltage (230 V) for the connection to the 230 V terminal. If more insulation is removed, there is a risk of short circuits on the PCB if the cable has not been correctly secured to the 230 V terminal.

2. 1
2
1. Hinge the electronics box (1) forwards. 2. Undo the four clips on the rear cover (2) of the electron-
ics box from the brackets (3) on the electronics box at the rear and at the sides.

0020250181_00 geoTHERM Installation and maintenance instructions

19

6 Electrical installation
3. Hinge up the cover. 4. Note the components and accessories in the relevant
system instructions ( Page 51) that you have to connect in the electronics box.

20

Installation and maintenance instructions geoTHERM 0020250181_00

6.4 Wiring diagrams
230V~ NL

Electrical installation 6

34 1 2 5 6 78

1
X20
Relay PCB
Compressor

SRC

Operating

capacitor

X2

52

M

X18

X17 X19 X1A

X1B

X1C

X70

X700

230V~ 230V~ 230V~ 230V~ 230V~ 230V~

230V~

230V~

LBLA N L N L LO L N L N L N C R N

L LS

X100

6 5

-+

4

24= 24=

3

S20 S21 BUS

2

1

1 2 3 45 67 8 9 1 0 11 12 13 14 15 16
X24
7 8

1 12 34 5 67 8
X20

12 34
X25

X51

X30

Yellow Blue
SSM 2 GND & SSM 1 PWM2 PWM1

Brown Red

PWM1 SSM1
SSM2

GND PWM2

GND

Building

circuit pump

LN

Environ- L N mental

circuit pump

LN

LN

L L C ON L N L N L N

230V~ X1

230V~ 230V~

230V~ 230V~ 230V~ 230V~

X14 X700 X15

X13

X16

X1 1

X12

F1
Main PCB
3-way mixer
M

X40

10 9 8 7 6 543 21
X23

18 17 16 15 14 13 12 11 10 20 19 18 17 16 15 14 13 12 11 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1

X21

X22

p

High-pressure switch

Red Black Grey Yellow Orange

M Electronic expansion valve

Relay PCB

X700

Compressor safety relay

X70

Compressor

X1A

—

X1B

Power supply

X1C

Main PCB mains connection transfer

X17

Cooling active signal, thermostatic radiator valve

switch

X18

—

X19

—

X20

Main PCB control line

0020250181_00 geoTHERM Installation and maintenance instructions

21

6 Electrical installation

Main PCB F1 S20 S21 X1 X11 X12
X13 X14 X15

F2 T 4A/250 V fuse Contact thermostat connection (24 V=) — 230 V~ mains connection (main PCB) — Mains supply edge connector for the 2 in 7 additional module Environment circuit pump — —

X16 X20 – X25 X30 X40 X41
X51 X100 X700

Building circuit pump Internal electrical connections Diagnostics interface Control connection for 2 in 7 additional module DCF/AF edge connector (outdoor temperature sensor + DCF signal) AI display edge connector eBUS (e.g. VRC 700 control) Compressor safety relay

22

Installation and maintenance instructions geoTHERM 0020250181_00

Electrical installation 6

6.5 Connecting controls and accessories to the 13. Lay the lines correctly.

electronics

14. Use the strain reliefs to secure the cable in the elec-

Danger!

tronics box. 15. Close the electronics box. ( Page 23)

Risk of death from live connections!

There is a risk of death from electric shock

6.6 Closing the electronics box

when working in the heat generator’s elec-

tronics box.

3

Before working on the heat generator’s
electronics box, pull out the mains plug from the earthed plug socket.
Secure the power supply against being
switched back on.
Open the electronics box only when the
heat generator is disconnected from the power supply.

Caution. Risk of damage caused by incorrect installation.
Mains voltage at the incorrect plug terminals on the ProE system may destroy the electronics.
Do not connect a mains voltage to the
eBUS terminals (+/-).
1. Open the electronics box. ( Page 19) 2. Guide the connection cables of the components to be
connected (e.g. external components, outdoor temperature sensor) through the grommet on the underside of the product. 3. Use strain reliefs. 4. Shorten the connection cables as necessary. 5. Only strip a maximum of 3 cm from the outer sheathing of the flexible lines. 6. Ensure the inner conductor insulation is not damaged when stripping the outer sheathing. 7. Only strip inner conductors just enough to establish good, sound connections. 8. Fit the stripped ends of the conductors with crimp pin terminals to ensure a secure connection that is free from loose strands and to thus prevent short circuits. 9. Use a screwdriver to connect the ProE plug to the control’s connection cables.
Note Ensure that the conductors are securely fastened to the plug terminals of the ProE plug.
10. Connect the controls and accessories in accordance with the wiring diagrams in the appendix.
11. If you install the control in the product (depending on the basic system diagram, see appendix), remove the panel from the product and insert the control into the slot.
12. Plug the ProE plug into the relevant PCB slot of the heat pump’s main PCB.

1
2
1. Close the back wall (2) by pressing downwards on the electronics box (1).
2. Ensure that all four clips (3) audibly click into the brackets.
3. Fold the electronics box upwards. 4. Attach the casing. ( Page 23) 5. Attach the front casing. ( Page 24)
6.7 Checking the electrical installation
After the installation is complete, check the electrical
installation by checking that the established connections are secured correctly and are sufficiently insulated.
6.8 Completing installation 6.8.1 Checking the system pressure and leak-
tightness 1. After completing the installation, carry out a check of
the system. 2. Start up the heat pump in accordance with the relevant
operating instructions.
Checking the water pressure and checking for water leaks 3. Check the heating installation for leaks.
6.8.2 Attaching the casing to the heat pump 1. Hang the casing on the upper hooks for the heat pump. 2. Use two screws to secure the casing to the front side of
the heat pump.

0020250181_00 geoTHERM Installation and maintenance instructions

23

Start-up

6.8.3 Attaching the front casing to the heat pump
1. Place the front casing on the upper brackets. 2. Push the front casing onto the heat pump until the re-
taining clips snap into place on the front casing. To help you, you can also push the retaining clips upwards at the same time. 3. Secure the front casing by screwing in the screw on the underside of the heat pump.
6.8.4 Connecting the heat pump to the power supply
Danger! Risk of death from electric shock!
The product is fitted with a CEE 7/7 mains plug at the factory. There is a risk of death from electric shock if the mains plug is connected to an incompatible earthed plug socket.
If no suitable country-specific earthed plug
socket is available, use a country-specific adapter plug with a protection contact.

7.2 Starting up the heat pump
Plug the mains plug into an earthed plug socket. The display shows the basic display.
7.3 Running through the installation assistant The installation assistant is launched when the heat pump is switched on for the first time. You must confirm the launching of the installation assistant. Once confirmed, all heating demands from the heat pump are blocked. This status remains until the installation assistant is completed or cancelled.
7.3.1 Setting the language
Set the required language.
7.3.2 Setting the freeze protection
Applicability: Ground/brine environment circuit type
If required, change the temperature. It is set to -7 °C at
the factory. ­ Freeze protection: -13 … 4

Danger! Risk of fire caused by an incompatible earthed plug socket. The product is fitted with a CEE 7/7 mains plug at the factory. There is a risk of fire if the mains plug is connected to an incompatible earthed plug socket.
If no suitable country-specific earthed plug
socket is available, use a country-specific adapter plug with a protection contact.
After completing all of the other installation steps, plug
the mains plug into a suitable earthed plug socket.
7 Start-up
Observe the relevant information about starting up the
unit in the system instructions.
7.1 Heat pump operating concept The operating concept and operation of the heat pump is described in the operating instructions for the heat pump.

7.3.3 Purging the building circuit
Start the check programme P.05 in order to purge
( Page 29) the building circuit.

7.3.4 Purging the environment circuit
Start the check programme P.06 in order to purge
( Page 29) the environment circuit.

7.3.5 Telephone number for the competent person

You can store your telephone number in the appliance menu.

The operator can display it in the information menu. The tele-

phone number can be up to 16 digits long and must not con-

tain any spaces. If the telephone number is shorter, end the

entry after the last digit by pressing the right-hand selection

button

.

All of the digits to the right will be deleted.

7.3.6 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.

7.1.1 Overview of the installer level menu structure

Installer level overview ( Page 32)

24

Installation and maintenance instructions geoTHERM 0020250181_00

Adapting the unit to the heating installation

7.4 Calling up Live Monitor (checking status codes)
Menu Live Monitor
­ You can use this function to call up the status code of the heat pump, which provides you with information about the current operating condition of the heat pump (Status display ( Page 28)).
7.5 Calling up the installer level
1. Press and at the same time. ­ Menu Installer level
2. Set the value 17 (code) and confirm by pressing .

7.7 Calling up statistics
Menu Installer level Test menu Statistics
­ You can use this function to call up the statistics for the heat pump.
7.8 Checking that the product works correctly
1. Start up the product in accordance with the relevant operating instructions.
2. Navigate to Menu Installer level Test programmes Check programmes.
3. Check the heating mode using P.01. 4. Check the cooling mode using P.02.

7.6 Heating mode flow temperature control
For economical and fault-free operation of a heat pump, it is important to regulate the start of the compressor. The startup of the compressor is the point at which the highest loading occurs. Using the energy balance control, it is possible to minimise the number of heat pump start-ups without having to forgo the convenience of a comfortable room environment. As with other weather-compensated heating controls, the control determines a target flow temperature by recording the outdoor temperature using a heating curve. The energy balance calculation is made on the basis of this target flow temperature and the actual flow temperature ­ the difference per minute is measured and added up:
1 degree minute [°min] = 1 K temperature difference in the course of 1 minute
The heat pump starts up at a defined heat deficit (under the menu item Configuration Compressor starts at) and only switches off again when the supplied heat is equal to the heat deficit. The larger the preset negative numerical value, the longer the periods for which the compressor operates or does not operate.
As an additional condition, if there is a deviation of more than 7 K between the actual flow temperature and the target flow temperature, the compressor is directly switched on and switched off. The compressor always starts immediately if a heating demand only just arises from the control (e.g. due to a time period or switching from gas-fired product operation to heat pump mode).
Time conditions for compressor operation
When operating the compressor, the following shall always apply:
­ Minimum running time: 2 minutes ­ Minimum rest period: 5 minutes ­ Minimum time from start to start: 20 minutes

8 Adapting the unit to the heating installation

8.1 Adapting the unit to the heating installation
The installation assistant is launched when the heat pump is switched on for the first time.
If you have already filled the heating installation and terminated the installation assistant, but want to set the most important system parameters again, you can also call up the Configuration menu item.
Menu Installer level Configuration

8.2 Heat pump setting parameters
To individually adjust the heat pump, you can adjust certain parameters in the Configuration menu.
Menu Installer level Configuration

Parameter Explanation

Language

Select the required language here.

Contact data

As a competent person, you can enter your telephone number here. The end customer can read this number in the menu Information.

Compressor starts at

Heat deficit at which the compressor is started in heating mode. See section “Heating mode flow temperature control”.

Comp. hysteresis

Additional condition for switching the compressor on and off. See section “Heating mode flow temperature control”

Max. rem. feed head

Limiting the product’s remaining feed head in the building circuit. If the value is reduced, the pump speed is limited as far as necessary in order to prevent the remaining feed head from being exceeded.

Conf. build cir. pump

Switching between automatic mode (flow rate regulation with operation- dependent target values) and fixed value mode (1-100%). The fixed value mode should only be selected if the installation does not permit automatic mode.

Boiler supp. set p.

Flow rate target value for controlling the internal building circuit pump in the event that the gasfired boiler is used for the mixing circuit and the pump also runs in the heat pump. Only in conjunction with the VWZ ZK accessory.

Enviro. pump set p.

Target fixed value for the environment circuit pump. This setting is used to adapt to the installed environment circuit (e.g. ground probe or ground collector).

0020250181_00 geoTHERM Installation and maintenance instructions

25

8 Adapting the unit to the heating installation

Parameter Freeze protection
Enable emergency mode
Software version

Explanation
Minimum outlet temperature from the heat pump into the environment circuit at which operation is stopped in order to prevent the brine from freezing.
If “On” is selected here and no control is connected (e.g. due to a defect), it is possible to adjust a target flow value and select an operating mode in the basic menu in order to operate the heat pump in limp home mode.
The version number for the main PCB (HMU xxxx) and the display (AI xxxx) are shown here alternately.

Additional setting data is listed in the appendix.

8.3 Setting the high-efficiency pumps
8.3.1 Setting the building circuit pump
Automatic mode At the factory, the nominal volume flow is automatically achieved by volume flow regulation. This volume flow regulation allows for efficient operation of the heating pump because the pump speed is adjusted to the hydraulic resistance of the system. Vaillant recommends that you retain this setting.
Manual operation
[ mbar ] 700

600

500

400 300

5 K /460 l/h (VWS)

200 100

0

30

40

50

60

70

80

90

100 [ % ]

Menu Installer level Configuration Building circuit pump conf.
If you do not want to operate the pump in automatic mode, you can set the manual mode in the Configuration menu. The diagram shows how setting the pump actuation affects the remaining feed head at nominal volume flow for a temperature spread of 5 K on the heating side.
Setting the maximum differential pressure in the building circuit If the differential pressure in the building circuit is not permitted to exceed a maximum value, this limit can be set in the Configuration menu within the range of 0.02 to 0.07 MPa (0.2 to 0.7 bar).
Menu Installer level Configuration Max. remaining feed head
8.3.2 Setting the environment circuit pump
If the heat source temperature spread lies below 2 K due to low pressure losses (large pipe cross-sections, low drilling depth) in continuous operation, you can adjust the pump output. The following diagram shows how setting the pump ac-

tuation affects the remaining feed heads at nominal volume flows for a heat source temperature spread of 3 K.

[ mbar ] 700

600

500

400 300

3K / 620 l/h (VWS)

200

100

0

30

40

50

60

70

80

90

100 [ % ]

The default setting for the environment circuit pump is 75%.

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

1. Activate manual operation.

­ Menu Installer level Configuration Enable

limp home mode

2. Press the right-hand selection button

(” “).

The display shows the flow temperature in heating
mode.

3. Use the minus button

or plus button

to change the flow temperature in heating

mode.

­ Max. heating mode flow temperature: 55 (131.0 )

4. Confirm the change by pressing the right-hand selection

button

(“OK”).

8.5 Setting the flow temperature in cooling mode (with no controller connected)

1. Activate manual operation.

­ Menu Installer level Configuration Enable limp home mode

2. Press the right-hand selection button twice.

(” “)

The display shows the value of the flow temperature
in cooling mode.

3. Use the minus button

or plus button

mode.

to change the flow temperature in cooling

4. Confirm the change by pressing the right-hand selection

button

(“OK”).

Note
At the factory, the target flow temperature can be set between 20 °C and 16 °C in cooling mode.

26

Installation and maintenance instructions geoTHERM 0020250181_00

Inspection and maintenance 9

8.6 Handing the product over to the end user
Explain to the end user how the safety devices work and
where they are located.
Inform the end user how to handle the product. In particular, draw attention to the safety information
which the end user must follow.
Inform the end user of the necessity to have the product
maintained according to the specified intervals.
Pass all of the instructions and documentation for the
product to the end user for safe-keeping.

9 Inspection and maintenance

9.1 Inspection and maintenance check-list
The following table shows the inspection and maintenance work that must be carried out at specific intervals.

No. Work
1 Check the general condition and leak-tightness of the heat pump.
2 Check the pressure in the heating circuit and, if required, top up the heating water.
3 Check the volume and concentration of the brine fluid and the pressure in the brine circuit.
4 Check the condensate discharge of the heat pump for blockages and remove any dirt or blockages.
5 Check that the expansion vessel in the heating circuit operates correctly.
6 Check the heat pump for leaks in the brine and heating circuit and eliminate these leaks, if required.

Inspection (every year, within 24 months at the latest) x
x
x
x
x
x

Maintenance (every two years)
x x
x
x
x
x

9.2 Observing inspection and maintenance intervals
Danger! Risk of damage and personal injury as a result of neglected and improper inspection and maintenance.
Inspection and maintenance work must only be carried out by a competent person.
Carry out the inspection and maintenance
work described on a regular basis and to a professional standard.

Danger! Risk of electric shock!
Touching live connections may cause serious personal injury.

Always switch off all power supply lines
for the heat pump and all components involved before carrying out any electrical installation or maintenance work.
Check that there is no voltage. Secure the power supply against being
switched back on.
9.3 Preparing for inspection and maintenance
9.3.1 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 reverse of these instructions.
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the product.
9.3.2 General inspection and maintenance information
Inspection
The inspection is intended to determine the actual condition of the respective product and compare it with the target condition. This is done by measuring, checking and observing.
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.
9.3.3 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.
( Page 28)
Carry out the maintenance work that is listed in the table.
Maintenance messages ( Page 35)
Conditions: 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.
If the temperature sensor for the building circuit outlet, environment circuit inlet or environment circuit outlet fails, the product continues to run with replacement values.
To determine which component is defective, read the
fault memory. ( Page 28)

0020250181_00 geoTHERM Installation and maintenance instructions

27

Troubleshooting

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.
9.4 Cleaning the product
Caution. Risk of material damage caused by unsuitable cleaning agents.
Do not use sprays, scouring agents, de-
tergents, solvents or cleaning agents that contain chlorine.
Clean the casing and operator control elements with a
damp cloth and a little solvent-free soap.
9.5 Checking and correcting the filling pressure of the heating installation
If the filling pressure falls below the minimum pressure, a fault message is shown in the display.
­ Minimum heating water pressure: 0.05 MPa ( 0.50 bar)
Top up the water to start up the heat pump again. (See
section: Filling the system ( Page 18)).
If you notice frequent drops in pressure, determine and
eliminate the cause.
9.6 Checking and correcting the filling pressure in the brine circuit
If the filling pressure falls below the minimum pressure, the heat pump is automatically shut down and a fault message is shown in the display.
­ Minimum brine fluid pressure: 0.05 MPa ( 0.50 bar)
Top up the brine fluid to start up the heat pump again.
(See section: Filling the brine circuit ( Page 18)). ­ Brine fluid operating pressure: 0.1 … 0.2 MPa (1.0
… 2.0 bar)
If you notice frequent drops in pressure, determine and
eliminate the cause.
9.7 Carrying out a restart and test operation
Warning. Risk of injury due to hot and cold components. The heat pump must only be started up after all the casing sections have been installed.
Before starting up the unit, fit all of the
casing sections for the heat pump.
1. Start up the heat pump system.

2. Check that the heat pump system is working without any problems.
10 Troubleshooting
10.1 Troubleshooting 10.1.1 Checking the status codes 10.1.1.1 Calling the Live Monitor Menu Live Monitor ­ You can call up status codes in the heat pump’s display
and these codes provide you with information about the current operating status of the heat pump. Status codes ( Page 35)
10.1.1.2 Status code meanings The status codes provide you with information about the current operating status of your product. If several operating statuses occur at the same time, the applicable status codes are displayed alternately, one after the other.
10.1.2 Querying the fault memory Menu Installer level Fault list The heat pump has a fault memory. You can use this to query the last ten faults that occurred in chronological order. If a DCF sensor is connected, the date on which the fault occurred is also displayed. You can only call up fault lists if faults have previously occurred.
Display views ­ Number of faults that occurred ­ The fault currently selected with fault number F.xxx You can find a list of the sensor characteristic values in the appendix. Sensor characteristics for the VR 10 external temperature sensor ( Page 39) Sensor characteristics for the internal temperature sensors ( Page 40) Sensor characteristic value for the VRC DCF outdoor temperature sensor ( Page 41)
10.1.3 Resetting the fault memory 1. Press (Delete). 2. Confirm that you wish to clear the fault memory by
pressing (OK).
10.1.4 Overview of fault codes You can find an overview of the fault codes in the appendix. You can find a list of the surface-mounted sensor resistances in the appendix.
10.1.5 Restarting the installation assistant You can restart the installation assistant any time by calling it up manually in the menu.

28

Installation and maintenance instructions geoTHERM 0020250181_00

Replacing components 11

Menu Installer level Start inst. assistant
10.1.6 Using check programmes Menu Installer level Test menu Check programmes You can use this function to start check programmes.
Note If the heat pump is in a fault state, you cannot start the check programmes.
You can press the left-hand selection button (Cancel) at any time to end the check programmes.
11 Replacing components

7. Ensure that water does not drip on live components (e.g. the electronics box).
8. Use only new seals and O-rings.
11.1.2 Completing the replacement work 1. Attach the casing. ( Page 23) 2. Attach the front casing. ( Page 24)
11.1.3 Replacing the PCB and/or the display
Danger! Risk of death from electric shock! Power supply terminals L and N remain live even if the heat pump is switched off.
Isolate the heat pump from the power grid
by pulling out the mains plug.

11.1 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 reverse of these instructions.
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the product.
11.1.1 Preparing for replacement work
Danger! Risk of death from electric shock!
Power supply terminals L and N remain live even if the heat pump is switched off.
Isolate the heat pump from the power grid
by pulling out the mains plug.

Caution. Risk of damage caused by incorrect repair work.
Using an incorrect replacement display may cause damage to the electronics.
Before replacing, check that the correct
replacement display is available.
Never use another replacement display.
Comply with the assembly and installation instructions
provided with the spare parts.
11.1.3.1 Replacing either the PCB or the display
1. Replace the PCB or display according to the assembly and installation instructions supplied.
If you are replacing only one of the two compon-
ents (PCB or display), the parameterization functions automatically. When the product is switched on, the new component adopts the previously set parameters from the unreplaced component.
2. Plug the plug into the new PCB. ­ When replacing the PCB

1. Decommission the heat pump.
Note When carrying out any repair work on the heat pump, make sure that you observe the following instructions for your own safety and to avoid material damage to the heat pump.

Note
Coding resistors are integrated into the plugs and these enable the unit type to be detected.

2. Disconnect the heat pump from the power grid.
3. Remove the front casing as shown in the illustration. ( Page 15)
4. Remove the side casing. ( Page 15)
5. Close the service valves in the heating flow and in the heating return.
6. Drain the heat pump if you want to replace water-carrying components in the heat pump.

0020250181_00 geoTHERM Installation and maintenance instructions

29

Decommissioning

11.1.3.2 Replacing the PCB and the display at the same time
Language 01 English

12 Decommissioning
12.1 Temporary decommissioning 12.1.1 Protecting the heat pump against frost
Observe the requirements for the installation site of the
heat pump ( Page 11).

Cancel

OK

1. Use the minus button

and the plus button

to select the required language, and con-

firm this by pressing the right-hand selection button

“OK”.

You then automatically access the installation as-
sistant.

2. Set the required values for the initial installation.

12.2 Permanently decommissioning
12.2.1 Recycling and disposal
Caution. Environmental hazard resulting from improper disposal.
Improper disposal of refrigerant can be harmful to the environment.
Ensure that refrigerant and brine fluid is
only disposed of by qualified competent persons.

11.1.4 Replacing the secondary PCB
1. Undo the fixing screw for the secondary PCB box. 2. Fold the secondary PCB box downwards. 3. Undo the connection cable. 4. Release the secondary PCB from the clips. 5. Insert the new secondary PCB and use the clips to se-
cure it in place. 6. Reconnect the connection cable to the secondary PCB.
11.1.5 Replacing pumps

Product Do not dispose of the product or any accessories in household waste.
Ensure that your old unit and any accessories are dis-
posed of properly.
Disposing of the product
If the product is identified with this symbol, it does not belong with the household waste at the end of its useful life.
Instead, take the product to a collection point for recyc-
ling electrical and electronic devices.
For more information on where to take used electrical and electronic devices, contact your town or district authorities, or a waste disposal company.

12.2.2 Disposing of the brine fluid
Danger! Risk of injury due to chemical burns!
1
The brine fluid ethylene glycol is harmful to health.
Avoid contact with the skin and eyes. Do not inhale or swallow. Always wear gloves and protective
goggles.
Observe the safety data sheet that ac-
companies the brine fluid.

1. Remove the insulating material from the pipelines in the Ensure that the brine fluid is disposed of in compliance

area of the pump.

with local regulations, for example, at an appropriate

2. Undo the cap nuts (1) from the pump connections.

waste site or waste incineration plant.

3. Install the new pump with new seals.

For smaller volumes, contact your local disposal com-

4. Install new vapour-diffusion-tight insulating material

pany.

around the pipelines.

12.2.3 Arranging disposal of refrigerant

The product is filled with R410A refrigerant.

30

Installation and maintenance instructions geoTHERM 0020250181_00

Refrigerant must only be disposed of by a qualified com-
petent person.
13 Customer service

Customer service

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31

Appendix

Appendix A Heat pump schematic

S22

S8

P

T

A1 S1
T

S2 T

S14 T

P S18
HE2
A12 (230 V) & A13 (PWM) S10
T

Sensors & Switches: – 8 x T – 4 x P sensor – 1 x P switch – 1 x V flow rate sensor
S11 T

Mesh filter

A1 A7 A10/ A11 A12/ A13 HE1 HE2 S1 S2 S3 S4

Compressor Electronic expansion valve Heating pump (relay and pulse-width modulation) Source pump (relay and pulse-width modulation) Condenser Evaporator Compressor inlet temperature sensor Compressor outlet temperature sensor High-pressure sensor High-pressure switch

P SW

S15

S4

S3

P

A7

S16

T

HE1

A10 (230 V) & A11 (PWM)

S13

P

T

Mesh filter

S17

S8

Source inlet temperature sensor

S10

Source outlet temperature sensor

S11

Temperature sensor of the electronic expansion

valve with HEX heat source

S13

Heating return temperature sensor

S14

Heating flow temperature sensor

S15

Heating circuit flow rate sensor

S16

Temperature sensor of the electronic expansion

valve with HEX heating

S17

Heating circuit pressure sensor

S18

Heat source pressure sensor

S22

Low-pressure sensor

B Installer level overview

Setting level
Installer level Enter code

Values

Unit

Min.

Max.

00

99

Increment, select

Default setting Setting

1 (competent person

00

code 17)

Installer level List of faults F.514 ­ F.7432)

Deleting

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

Environm. pump hours

Current value

h

1. Can only work in conjunction with the VWZ ZK accessory. 2) Fault lists (section 9.1) are only available, and can only be deleted, if faults have occurred.

32

Installation and maintenance instructions geoTHERM 0020250181_00

Setting level
Environm. pump starts Cooling mixer steps EEV steps VUV DHW switchings

Values

Unit

Min.

Max.

Current value

Current value

Current value

Current value

Increment, select

Installer level Test menu Check programmes P.01 Heating mode P.02 Cooling mode P.03 Hot water handling P.05 Purge building circuit P.06 Purge environment circuit P.07 Purge building and environment circuit

Select Select Select Select Select Select

Installer level Test menu Sensor/actuator test

T.01 Building circuit pump power 0

100

%

5, off

T.14 Env. circuit pump power

0

100

%

5, off

T.15 Cooling mixer position

0

100

%

5

T.33 Position of the electronic

0

100

%

5

expansion valve

T.45 Fault outlet

On, Off

T.48 Circulation pump

On, Off

T.49 Cooling relay active

On, Off

T.79 Flow temperature

-40.0

150.0

0.1

T.81 Return temperature

-40.0

150.0

0.1

T.82 Building circuit: Pressure

0

4.5

bar

0.1

T.83 Building circuit: Flow rate 0

1400

l/h

1

T.97 Environment circuit: Inlet

-40.0

150.0

0.1

temperature

T.98 Environment circuit: Outlet -40.0

150.0

0.1

temperature

T.121 Compressor outlet temper- -25.0

150.0

0.1

ature

T.122 Compressor inlet temper- -40.0

150.0

0.1

ature

T.125 EEV environment circuit

-40.0

150.0

0.1

temperature

T.126 EEV building circuit tem- -40.0

150.0

0.1

perature

T.127 High pressure

0.0

51.0

bar (abs)

0.1

T.128 Condensation temperature -52.0

70.0

0.1

T.129 Low pressure

0.0

22.0

bar (abs)

0.1

T.130 Evaporation temperature -52.0

70.0

0.1

T.131 Superheating target value 0.0

16.0

0.1

T.132 Superheating actual value 0.0

16.0

0.1

T.133 Subcooling actual value

0.0

99.0

0.1

T.134 High-pressure switch

Open, closed

T.146 Outside temperature

-60.0

45.0

0.1

1. Can only work in conjunction with the VWZ ZK accessory. 2) Fault lists (section 9.1) are only available, and can only be deleted, if faults have occurred.

Appendix
Default setting Setting
Closed

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33

Appendix

Setting level T.147 DCF status

Values

Unit

Min.

Max.

Increment, select
No DCF signal Validate DCF signal Valid DCF signal

Default setting Setting

Installer level Configuration Language

Current language

Contact data Compressor starts at Comp. hysteresis Max. rem. feed head Conf. heat. build. pump Conf. cool. build. pump Conf. DHW build. pump Reset anti- cycl. time Boiler supp. set p.1) Enviro. pump set p. Freeze protection Enable emergency mode Software version

Phone number

-999

0

3

15

200

700

1

100

1

100

1

100

0

120

300

1300

29

100

-14

5

°min mbar % % % min l/h %

Current value for the main PCB (HMU xxxx) and the display (AI xxxx)

01 Deutsch 02 English 03 Français 06 Nederlands 16 Norsk 18 Cestina 20 Slovenscina 27 Suomi 0-9 1 1 1 1, auto 1, auto 1, auto 1 20
1 1 On, Off

02 English
-60 7 700 Auto Auto Auto 0 1000 75 -7 Off

Installer level Resets Switch-on delay Statistics Factory settings

Yes, No

No

Yes, No

No

Yes, No

No

Installer level Start inst. assistant

Language

01 Deutsch 02 English 03 Français 06 Nederlands 16 Norsk 18 Cestina 20 Slovenscina 27 Suomi

Freeze protection

-13

4

1

Check programme

P.05 Purge building circuit
P.06 Purge environment circuit
P.07 Purge environment and building circuit

Contact data

Phone number

0-9

1. Can only work in conjunction with the VWZ ZK accessory. 2) Fault lists (section 9.1) are only available, and can only be deleted, if faults have occurred.

02 English -7

34

Installation and maintenance instructions geoTHERM 0020250181_00

Appendix

Setting level

Values

Unit

Increment, select

Min.

Max.

End the installation assistant?

Yes, back

1. Can only work in conjunction with the VWZ ZK accessory. 2) Fault lists (section 9.1) are only available, and can only be deleted, if faults have occurred.

Default setting Setting

Maintenance messages

Code M.32
M.34

Meaning Building circuit: Pressure low

Cause
­ Pressure loss in the building circuit due to leaks or air pockets
­ Building circuit pressure sensor is defective

Environment circuit: Pressure low

­ Pressure loss in the environment circuit due to leaks or air pockets
­ Environment circuit pressure sensor defective

Remedy
­ 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
­ Check the environment circuit for leaks, top up with medium (brine/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

D Status codes
Code Meaning Heat pump system S.34 Heating mode: Frost protection S.91 Service message: Demo mode S.100 Standby S.101 Heating: Compressor switched off S.102 Heating: Compressor blocked S.103 Heating: Flow S.104 Heating: Compressor active S.107 Heating: Overrun S.118 Cooling: Flow S.119 Cooling: Mixer active S.131 Hot water: Compressor shutdown S.132 Hot water: Compressor blocked S.133 Hot water: Flow S.134 Hot water: Compressor active S.137 Hot water: Overrun General S.201 Check program: Purging of env. circuit active S.202 Check program: Purging of building circuit active S.203 Actuator test active Communication S.211 Connection error: Display not detected S.212 Connection error: Control not detected

0020250181_00 geoTHERM Installation and maintenance instructions

35

Appendix

Code Meaning Environment circuit
S.242 Environment circuit: Outlet temperature too low S.246 Environment circuit: Pressure too low S.247 Env. circuit: Fault contact: Pump open Building circuit
S.272 Building circuit: Remaining feed heads limit active S.273 Building circuit: Flow temperature too low S.274 Building circuit: Pressure too low S.275 Building circuit: Flow rate too low S.276 Building cir.: Lockout contact S20 opened Refrigeration circuit
S.302 High pressure switch opened S.303 Compressor outlet temperature too high S.304 Evaporation temperature too low S.305 Condensation temperature too low S.306 Evaporation temperature too high S.308 Condensation temperature too high S.311 Environment cir. inlet temperature too low S.312 Building circuit inlet Return temperature too low S.313 Environment cir. inlet temperature too high S.314 Building circuit inlet Return temperature too high S.315 Compressor circuit breaker open S.316 WHB support active S.240 Oil temperature too low

E Fault codes

Code Meaning F.042 Sensor fault: Coding resistor 1 F.042 Sensor fault: Coding resistor 2 F.042 Sensor fault: Coding resistor 3 F.070 Invalid Device Specific Number
F.514 Temp. sensor fault: Compressor inlet F.517 Temp. sensor fault: Compressor outlet F.519 Sensor fault: Building circuit return temp. F.520 Temp. sensor fault: Building circuit flow F.532 Building circuit: Flow rate too low

Cause ­ Sensor not connected or sensor in-
put has short-circuited
­ Replacing the control PCB and display PCB
­ Sensor not connected or sensor input has short-circuited

Remedy
­ Check and, if required, replace the sensor (see sensor characteristic values in the appendix)
­ Replace the cable harness
­ Checking coding resistors 1 and 2
­ Disconnecting the product from the power supply and switching it back on again
­ Check and, if required, replace the sensor (see sensor characteristic values in the appendix)
­ Replace the cable harness

­ Stopcock was not opened
­ 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)

­ Check the stopcocks and thermostatic valves
­ Ensure that there is a minimum flow rate of 150 l/h
­ Check that the building circuit pump functions correctly

36

Installation and maintenance instructions geoTHERM 0020250181_00

Appendix

Code Meaning F.546 Sensor fault: High pressure F.583 Building circuit: Flow temperature too low
F.585 Sensor fault: Building EEV temp F.685 Connection error: Control not detected F.700 Temp. sensor fault: EEV environment cir. F.701 Temp. sensor fault: Environ. circuit inlet F.702 Temp. sensor fault: Environment cir. out F.703 Sensor fault: Low pressure F.704 Sensor fault: Building cir. pressure F.705 Sensor fault: Enviro. cir. pressure F.706 Sensor fault: Building flow rate F.710 Environment circuit: Outlet temperature too
low
F.714 Environment circuit: Pressure too low
F.715 Environment circuit: Fault contact, pump open

Cause

Remedy

­ Sensor not connected or sensor input has short-circuited

­ Check and, if required, replace the sensor (see sensor characteristic values in the appendix)
­ Replace the cable harness

­ The temperature sensor in the flow is ­ Checking the building circuit’s

defective

flow rate

­ Air in the building circuit

­ Check the quality of the plug contact on the PCB and on the cable harness

­ Check that the sensor is working correctly (measure the resistance using the sensor characteristic values, see appendix)

­ Replace the sensor

­ Purging the building circuit

­ Sensor not connected or sensor input has short-circuited

­ Check and, if required, replace the sensor (see sensor characteristic values in the appendix)
­ Replace the cable harness

­ The VRC 700 control was previously detected but the connection is broken

­ Check the eBUS connection to the VRC 700 control

­ Sensor not connected or sensor input has short-circuited

­ Check and, if required, replace the sensor (see sensor characteristic values in the appendix)
­ Replace the cable harness

­ Environment circuit pump defective
­ Temperature sensor for environment circuit outlet defective
­ Volume flow too low in the environment circuit
­ Air in the environment circuit

­ Check the environment circuit flow rate
­ Check the quality of the plug contact on the PCB and on the cable harness
­ Check that the sensor is working correctly (measure the resistance using the sensor characteristic values in the appendix)
­ Replace the sensor
­ Check the volume flow of the environment circuit pump (optimum spread of 3 K)
­ Purging the environment circuit

­ Pressure drop in the environment

­ Check the environment circuit for

circuit due to leakages or air pockets

leaks

­ Environment circuit pressure sensor ­ Top up the medium

defective

(brine/water), purge

­ Check the quality of the plug contact on the PCB and on the cable harness

­ Check that the pressure sensor works correctly

­ Replace the pressure sensor

­ The electronics of the high-efficiency ­ Switch the heat pump off for at

pump has detected a fault (e. g. dry

least 30 seconds (no current)

running, blockage, overvoltage, undervoltage) and switched the pump off as a securing measure.

­ Check the quality of the plug contact on the PCB
­ Check that the pump functions

correctly

­ Purging the environment circuit

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37

Appendix
Code Meaning F.723 Building circuit: Pressure too low
F.726 Compressor protector switch opened
F.730 Low pressure switch opened F.731 High pressure switch opened
F.732 Compressor outlet temperature too high
F.733 Evaporation temperature too low
F.734 Condensation temperature too low

Cause

Remedy

­ Pressure drop 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 works correctly
­ Replace the pressure sensor

­ Compressor overheated, e.g. as

­ Environmental temperatures fall

a result of operating outside of its

below 40 °C

application limits

­ Check the pressure difference

­ Maximum environmental temperature

during the start-up attempt

of 40 °C exceeded for the heat pump

­ Compressor blocked due to mechanical defect

­ Compressor blocked because the pressure difference is too high when switched on (> 3 bar)

­ Low-pressure switch input not bridged (X22-8 to X22-11)

­ Replace the cable harness

­ Refrigerant pressure too high. The integrated high-pressure switch tripped at 41.5 bar (g)
­ Insufficient energy output via the relevant capacitors

­ Purging the building circuit
­ Insufficient volume flow as a result of closing individual room controls in an underfloor heating system
­ Check the existing dirt filter for penetrability
­ Refrigerant flow rate too low (e.g. electronic expansion valve defective, filter blocked)

The compressor outlet temperature is

­ Check the low-pressure sensor,

above 115 °C:

compressor inlet sensor and

­ Application limits exceeded

compressor outlet sensor ­ Check the EEV (does the EEV

­ EEV does not work or does not open

move to the limit stop? Use the

correctly

sensor/actuator test)

­ Refrigerant volume too low

­ Check the refrigerant volume

(700 g)

­ Carry out a leak-tightness test

­ No flow rate in the environment circuit (heating mode)
­ Energy input too low in the environment circuit (heating mode) or building circuit (cooling mode)

­ Check the flow rate in the environment circuit
­ Check the dimensioning of the environment circuit (heating mode)
­ If the building circuit contains thermostatic valves, check that they are suitable for cooling mode (cooling mode)
­ Check the low-pressure sensor and compressor inlet sensor

­ Temperature in the building circuit (heating mode) or environment circuit (cooling mode) too low for compressor operation
­ 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, high-pressure sensor and low-pressure sensor
­ Check the refrigerant volume (700 g)
­ Leak-tightness test

38

Installation and maintenance instructions geoTHERM 0020250181_00

Appendix

Code Meaning F.735 Evaporation temperature too high
F.740 Environment cir. inlet temperature too low F.741 Building circuit inlet Return temperature too
low F.742 Environment cir. inlet temperature too high F.743 Building circuit inlet Return temperature too
high

Cause ­ Temperature in the environment cir-
cuit (heating mode) or building circuit (cooling mode) too high for compressor operation ­ Feed-in of external heat into the environment circuit
­ Inlet temperature in the environment circuit too low for the compressor to start
Heating: ­ VWS environment circuit inlet tem-
perature < -10 °C ­ Return temperature in the building
circuit too low for the compressor to start Heating: ­ Return temperature < 5 °C Cooling: ­ Return temperature < 7 °C ­ Inlet temperature in the environment circuit too high for the compressor to start Heating: ­ Environment circuit inlet temp. > 25 °C
­ Return temperature in the building circuit too high for the compressor to start
Heating: ­ Return temperature > 55 °C Cooling: ­ Return temperature > 35 °C

Remedy ­ Reduce or stop the external heat
that is entering ­ Check the de-icer (does it heat
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 inlet sensor and low-pressure sensor ­ Check the dimensioning of the environment circuit for VWS ­ Check the sensors
­ Check the sensors ­ Checking the cooling mixer
­ Check the environment circuit ­ Check the sensors ­ Checking the environment circuit
pump ­ Checking the cooling mixer ­ Checking the isolation valve
in the environment circuit (if present) ­ Check the sensors ­ Checking the heating pump ­ Checking the non-return flap (if present) ­ Checking the 2-zone set (if present)

F Sensor characteristics for the VR 10 external temperature sensor

Temperature (°C) -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20

Resistance (ohms) 87879 63774 46747 34599 25848 19484 14814 11358 8778 6836 5363 4238 3372

0020250181_00 geoTHERM Installation and maintenance instructions

39

Appendix

Temperature (°C) 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155

Resistance (ohms) 2700 2176 1764 1439 1180 973 807 672 562 473 400 339 289 247 212 183 158 137 120 104 92 81 71 63 56 50 44

G Sensor characteristics for the internal temperature sensors

Temperature (°C) -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45

Resistance (ohms) 332094 239900 175200 129287 96358 72500 55046 42157 32554 25339 19872 15698 12488 10000 8059,1 6534,7 5329,9 4371,7

40

Installation and maintenance instructions geoTHERM 0020250181_00

Appendix

Temperature (°C) 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150

Resistance (ohms) 3605,3 2988,7 2489,9 2084,4 1753,0 1480,9 1256,4 1070,3 915,5 786,4 678,1 586,8 509,5 443,9 388,1 340,3 299,3 264,0 233,6 207,2 184,3

H Sensor characteristic value for the VRC DCF outdoor temperature sensor

Temperature (°C) -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40

Resistance (ohms) 2167 2067 1976 1862 1745 1619 1494 1387 1246 1128 1020 920 831 740

0020250181_00 geoTHERM Installation and maintenance instructions

41

Appendix

I Technical data

Technical data ­ General
Flow/return heating connections, boiler side Boiler-side flow/return heat source connections Product dimensions, width Product dimensions, height Product dimensions, depth Weight without packaging Weight with packaging Weight when ready for operation Heating circuit/compressor rated voltage Control circuit rated voltage Fuse type B, slow-blow Optional on-site residual-current circuit breaker In-rush current without in-rush current limiter Min. electrical power consumption for B-10/W20 Max. electrical power consumption for B20/W55 Max. electrical power consumption in continuous operation IP rating in accordance with EN 60529 Inner sound power level (LWi) in accordance with EN 12102; heating mode at B0/W35 Inner sound power level (LWi) in accordance with EN 12102; heating mode at B0/W45 Inner sound power level (LWi) in accordance with EN 12102; heating mode at B0/W55 Permissible ambient temperature Installation room at a refrigerant volume of 0.70 kg Installation site

VWS 36/4.1 230V 22 mm diameter 22 mm diameter
440 mm 720 mm 435 mm
59 kg 67 kg 66 kg 1/N/PE 230 V / 50 Hz 1/N/PE 230 V / 50 Hz 16 A RCB type A or RCB type B 23 A 0.6 kW 1 kW 4.7 A IP 20 41.1 dB(A) 43.6 dB(A) 44.7 dB(A) 7 … 40 1.6 m³ Interior/dry

Technical data ­ Source circuit
Min. brine fluid operating pressure
Max. brine fluid operating pressure
Nominal volume flow T 3 K for B0/W35 Min. source inlet temperature (hot brine) in heating mode Max. source inlet temperature (hot brine) in heating mode Brine content of the brine circuit in the heat pump Remaining feed head at max. T 3 K B0/W35 Electrical power consumption of the brine pump at B0/W35 T 3 K with an external pressure loss of 250 mbar in the source circuit Electrical power consumption of the brine pump Pump type Materials
Brine fluid type

VWS 36/4.1 230V 0.05 MPa (0.50 bar) 0.3 MPa (3.0 bar) 600 l/h -10 20 3.5 l 590 mbar 21 W

3 … 70 W

High-efficiency pump

­

Cu

­

CuZn alloy

­

Stainless steel

­

EPDM

­

Brass

­

Fe

Ethylene glycol 30% vol.

42

Installation and maintenance instructions geoTHERM 0020250181_00

Appendix

Technical data ­ Heating circuit
Minimum operating pressure
Maximum operating pressure
Min. heating mode flow temperature Max. heating mode flow temperature Min. cooling mode flow temperature Heating circuit water contents in the heat pump Nominal volume flow at B0 T 3 K / W35 T 5 K Nominal volume flow at B0 T 3 K / W55 T 8 K Max. remaining feed head B0 T 3 K / W35 T 5 K Max. remaining feed head at B0 T 3 K / W55 T 8 K Electrical power consumption of the heating pump Electrical power consumption of the heating pump at B0/W35 T 5 K for a 250 mbar external pressure loss in the heating circuit Permissible heating water condition
Pump type Materials

VWS 36/4.1 230V 0.05 MPa (0.50 bar) 0.3 MPa (3.0 bar) 20 60 16 3.5 l 470 l 250 l 400 mbar 680 mbar 4 … 63 W 21 W

Only add permitted frost or corrosion protection agents to the heating water if these are approved in the
installation instructions. Soften the heating water at water hardnesses from 3.0 mmol/l (16.8° dH) according
to Directive VDI 2035 sheet 1.

High-efficiency pump

­

Cu

­

CuZn alloy

­

Stainless steel

­

EPDM

­

Brass

­

Fe

Technical data ­ Refrigeration circuit
Refrigerant type Refrigerant content of the refrigerant circuit in the heat pump Global warming potential (GWP) in accordance with regulation (EU) no. 517/2014 CO equivalent Expansion valve design Permissible operating pressure (relative)
Compressor type Oil type Oil level

VWS 36/4.1 230V R410A 0.7 kg 2088 1.46 t
Electronic 4.15 MPa (41.50 bar) Rotary piston
FV50S 0.3 l

Technical data ­ Heat pump system performance data The following performance data is applicable to new products with clean heat exchangers.

Heating output B0/W35 T 5 K Power consumption B0/W35 T 5 K Effective power consumption B0/W35 T 5 K Coefficient of performance EN 14511 B0/W35 T 5 K Heating output B0/W45 Power consumption B0/W45 Effective power consumption B0/W45 T 8 K

VWS 36/4.1 230V 2.50 kW 0.70 kW 0.63 kW 4.00 2.30 kW 0.8 kW 0.74 kW

0020250181_00 geoTHERM Installation and maintenance instructions

43

Appendix

Coefficient of performance EN 14511 B0/W45 Heating output B0/W55 T 8 K Power consumption B0/W55 T 8 K Effective power consumption B0/W55 T 8 K Coefficient of performance EN 14511 B0/W55 T 8 K Cooling output B10/W18(22), passive

VWS 36/4.1 230V 3.10
2.20 kW 0.90 kW 0.88 kW
2.50 5 kW

Application limits for the heat pump: Heating (heat source = brine) ­ At the same volume flow rates in the heating circuit (T 5 K or T 8 K) and the brine circuit (T 3 K) as for the nominal
heat output test under standard nominal conditions. Operation of the pump outside the application limits results in the heat pump being switched off by the internal control and safety devices. ­ Application limits for the heat pump: Heating: ­ B-10/W20 ­ B-10/W55 ­ B-3/W60 ­ B20/W60 ­ B20/W20 ­ To be able to achieve the B-10/W20 and B-10/W55 operating limits, you must change the freeze protection in the
configuration from the factory setting to -13 °C.

J Basic hydraulic diagram

J.1 Basic hydraulic diagram 0020232108

2

Heat pump

3e

Circulation pump

44

5e

Hydraulic tower

8b

Potable water expansion relief valve

Installation and maintenance instructions geoTHERM 0020250181_00

8c

Safety group ­ drinking water connection

8e

Heating diaphragm expansion vessel

8f

Diaphragm expansion vessel ­ potable water

9a

Single-room temperature control valve (thermo-

static/motorised)

9d

Bypass valve

J.2 Basic hydraulic diagram 0020235577

Appendix

9h

Filling/draining cock

9j

Tamper-proof capped valve

12

System control

12k

Limit thermostat

12m

Outdoor temperature sensor

1c

Heating/domestic hot water back-up boiler

9d

Bypass valve

2

Heat pump

9h

Filling/draining cock

3e

Circulation pump

9j

Tamper-proof capped valve

5

Monovalent domestic hot water cylinder

10c

Non-return valve

8b

Potable water expansion relief valve

12

System control

8c

Safety group ­ drinking water connection

12k

Limit thermostat

8e

Heating diaphragm expansion vessel

12m

Outdoor temperature sensor

8f

Diaphragm expansion vessel ­ potable water

DHW

Cylinder temperature sensor

9a

Single-room temperature control valve (thermo-

static/motorised)

0020250181_00 geoTHERM Installation and maintenance instructions

45

Appendix
J.3 Basic hydraulic diagram 0020235580

1c

Heating/domestic hot water back-up boiler

2

Heat pump

3e

Circulation pump

5

Monovalent domestic hot water cylinder

8b

Potable water expansion relief valve

8c

Safety group ­ drinking water connection

8e

Heating diaphragm expansion vessel

8f

Diaphragm expansion vessel ­ potable water

9d

Bypass valve

9e
9h 9j 10c 12 12b 12m DHW MA

Domestic hot water generation prioritising diverter valve Filling/draining cock Tamper-proof capped valve Non-return valve System control Remote heat pump expansion module Outdoor temperature sensor Cylinder temperature sensor Multi-function output

46

Installation and maintenance instructions geoTHERM 0020250181_00

J.4 Basic hydraulic diagram 0020249867

Appendix

2

Heat pump

9h

Filling/draining cock

3e

Circulation pump

9j

Tamper-proof capped valve

5

Monovalent domestic hot water cylinder

10c

Non-return valve

8b

Potable water expansion relief valve

12

System control

8c

Safety group ­ drinking water connection

12b

Remote heat pump expansion module

8e

Heating diaphragm expansion vessel

12m

Outdoor temperature sensor

8f

Diaphragm expansion vessel ­ potable water

DHW

Cylinder temperature sensor

9d

Bypass valve

MA

Multi-function output

9e

Domestic hot water generation prioritising diverter

valve

0020250181_00 geoTHERM Installation and maintenance instructions

47

Appendix
J.5 Basic hydraulic diagram 0020185684

1

Heat generator

9c

Flow regulator valve

2

Heat pump

9h

Filling/draining cock

3e

Circulation pump

9j

Tamper-proof capped valve

5

Monovalent domestic hot water cylinder

10c

Non-return valve

8a

Expansion relief valve

10e

Line strainer with magnetite separator

8b

Potable water expansion relief valve

12

System control

8c

Safety group ­ drinking water connection

12g

eBUS bus coupler

8e

Heating diaphragm expansion vessel

12k

Limit thermostat

8f

Diaphragm expansion vessel ­ potable water

12m

Outdoor temperature sensor

9a

Single-room temperature control valve (thermo-

DHW

Cylinder temperature sensor

static/motorised)

Either the heat pump or the gas-fired boiler are active in heating mode. It is not possible to operate the units in parallel. The domestic hot water is only generated by the gas-fired boiler.

­ Connect the underfloor heating circuits directly to the heat pump.
­ Connect two limit thermostats to guarantee the underfloor heating protection function for the heat pump and the gas-fired boiler.
­ Ensure that a minimum circulation water volume (40% of the nominal volume flow) is guaranteed.
­ Install one of the supplied non-return flaps in the flow of both the heat pump and the gas-fired boiler. The flow direction is from the product towards the heating installation; the backflow to the product is blocked
­ If you have installed a low loss header between the heat pump and the heating installation, the VF2 system sensor in the flow of the low loss header must be attached to the heating installation.
­ Install the control in the living room.

48

Installation and maintenance instructions geoTHERM 0020250181_00

J.6 Basic hydraulic diagram 0020180635

Appendix

1

Heat generator

9c

Flow regulator valve

2

Heat pump

9d

Bypass valve

3e

Circulation pump

9h

Filling/draining cock

5

Monovalent domestic hot water cylinder

9j

Tamper-proof capped valve

7i

2-zone module

9k

3-port mixing valve

8a

Expansion relief valve

10c

Non-return valve

8b

Potable water expansion relief valve

12

System control

8c

Safety group ­ drinking water connection

12a

Remote control unit

8e

Heating diaphragm expansion vessel

12d

Expansion/wiring centre

8f

Diaphragm expansion vessel ­ potable water

12g

eBUS bus coupler

9a

Single-room temperature control valve (thermo-

12k

Limit thermostat

static/motorised)

9b

Zone valve

12m

Outdoor temperature sensor

Using a 2-zone set and the appropriate information in the VRC 700 system control also makes the parallel heating mode possible for parallel operation of different temperature levels in the heating system with the different heat generators.
For the parallel heating mode, the 2-zone kit (Vaillant accessory) must be installed. The heat pump, the gas-fired boiler and the required heating circuits are connected to the 2-zone kit. When using a 2-zone kit (Vaillant accessory), the two non-return flaps are not required.
­ Connect two limit thermostats to guarantee the underfloor heating protection function for the heat pump and the gas-fired boiler
­ Ensure that a minimum circulation water volume (40% of the nominal volume flow) is guaranteed. ­ Install the control in the living room.

0020250181_00 geoTHERM Installation and maintenance instructions

49

Appendix
J.7 Basic hydraulic diagram 0020235626

1

Heat generator

9j

Tamper-proof capped valve

2

Heat pump

9k

3-port mixing valve

3e

Circulation pump

10c

Non-return valve

3f

Heating pump

10e

Line strainer with magnetite separator

5

Monovalent domestic hot water cylinder

12

System control

7f

Decoupler module

12a

Remote control unit

8b

Potable water expansion relief valve

12d

Expansion/wiring centre

8c

Safety group ­ drinking water connection

12g

eBUS bus coupler

8e

Heating diaphragm expansion vessel

12k

Limit thermostat

8f

Diaphragm expansion vessel ­ potable water

12m

Outdoor temperature sensor

9a

Single-room temperature control valve (thermo-

DHW

Cylinder temperature sensor

static/motorised)

9h

Filling/draining cock

FS

Flow temperature sensor

SysFlow Cylinder temperature sensor

50

Installation and maintenance instructions geoTHERM 0020250181_00

K Wiring diagrams
K.1 Wiring diagram 0020232108

Appendix

2

Heat pump

3e

Circulation pump

5c

Combi cylinder (tank in tank)

12

System control

12k

Limit thermostat

12m

Outdoor temperature sensor

0020250181_00 geoTHERM Installation and maintenance instructions

51

Appendix
K.2 Wiring diagram 0020235577

1c

Heating/domestic hot water back-up boiler

2

Heat pump

3e

Circulation pump

12

System control

12k 12m DHW

Limit thermostat Outdoor temperature sensor Cylinder temperature sensor

52

Installation and maintenance instructions geoTHERM 0020250181_00

K.3 Wiring diagram 0020235580

Appendix

1c

Heating/domestic hot water back-up boiler

12

System control

2

Heat pump

12b

Remote heat pump expansion module

3e

Circulation pump

12m

Outdoor temperature sensor

9e

Domestic hot water generation prioritising diverter

DHW

Cylinder temperature sensor

valve

0020250181_00 geoTHERM Installation and maintenance instructions

53

Appendix
K.4 Wiring diagram 0020249867

2

Heat pump

12

System control

3e

Circulation pump

12b

Remote heat pump expansion module

9e

Domestic hot water generation prioritising diverter

12m

Outdoor temperature sensor

valve

DHW

Cylinder temperature sensor

54

Installation and maintenance instructions geoTHERM 0020250181_00

K.5 Wiring diagram 0020185684

Appendix

1

Heat generator

2

Heat pump

3e

Circulation pump

12

System control

12g 12k 12m DHW

eBUS bus coupler Limit thermostat Outdoor temperature sensor Cylinder temperature sensor

0020250181_00 geoTHERM Installation and maintenance instructions

55

Appendix
K.6 Wiring diagram 0020180635

1

Heat generator

2

Heat pump

3e

Circulation pump

5

Monovalent domestic hot water cylinder

7i

2-zone module

9b

Zone valve

9k

3-port mixing valve

12

System control

12d

Expansion/wiring centre

12g

eBUS bus coupler

12k

Limit thermostat

12m

Outdoor temperature sensor

FS

Flow temperature sensor/swimming pool sensor

56

Installation and maintenance instructions geoTHERM 0020250181_00

K.7 Wiring diagram 0020235626

Appendix

1

Heat generator

2

Heat pump

3e

Circulation pump

3f

Heating pump

9k

3-port mixing valve

12

System control

12a

Remote control unit

12d 12g 12m DHW FS SysFlow

Expansion/wiring centre eBUS bus coupler Outdoor temperature sensor Cylinder temperature sensor Flow temperature sensor/swimming pool sensor System temperature sensor

0020250181_00 geoTHERM Installation and maintenance instructions

57

Appendix
L Commissioning Checklist
Applicability: Great Britain
Benchmark Commissioning and Servicing Section
It is a requirement that the boiler is installed and commissioned to the completed in full.

www.centralheating.co.uk

© Heating and Hotwater Industry Council (HHIC)
58

Installation and maintenance instructions geoTHERM 0020250181_00

Appendix

GROUND SOURCE HEAT PUMP COMMISSIONING CHECKLIST

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.

Customer name: Address: Heat Pump Make and Model Heat Pump Serial Number Commissioned by (PRINT NAME): Company name: Company address:
%XLOGLQJ5HJXODWLRQV1RWL¿FDWLRQ1XPEHULIDSSOLFDEOH>@

Telephone number:
&HUWL¿HG2SHUDWLYH5HJ1R>@ Telephone number: Commissioning date:

CONTROLS – SYSTEM AND HEAT PUMP (tick the appropriate boxes)

Time and temperature control to heating

Room thermostat and programmer/timer Load/weather compensation

Time and temperature control to hot water

Cylinder thermostat and programmer/timer

+HDWLQJ]RQHYDOYHVLQFOXGLQJXQGHUÀRRUORRSV

Fitted

Hot water zone valves

Fitted

Thermostatic radiator valves

Fitted

+HDW3XPS6DIHW,QWHUORFN>@

Built In

2XWGRRU6HQVRU

Fitted

Automatic bypass to system

Fitted

Buffer Vessel Fitted

Yes

No

If YES

Programmable Roomstat

2SWLPXPVWDUWFRQWURO

Combined with Heat pump main controls

Not required

Not required

Not required

Provided

Not required

Not required

Volume:

Litres

ALL SYSTEMS 7KHKHDWLQJVVWHPKDVEHHQ¿OOHGDQGSUHVVXUHWHVWHG ([SDQVLRQYHVVHOIRUKHDWLQJLVVL]HG¿WWHG FKDUJHGLQDFFRUGDQFHZLWKPDQXIDFWXUHU¶VLQVWUXFWLRQV 7KHKHDWSXPSLV¿WWHGRQDVROLGVWDEOHVXUIDFHFDSDEOHRIWDNLQJLWVZHLJKW 7KHVVWHPKDVEHHQÀXVKHGDQGFOHDQHGLQDFFRUGDQFHZLWK%6DQGKHDWSXPSPDQXIDFWXUHU¶VLQVWUXFWLRQV What system cleaner was used? What inhibitor was used? Are all exposed external pipeworks insulated?

Quantity

Yes Yes Yes Yes
litres Yes

BORE HOLE/GROUND LOOPS

Bore Hole

Ground Loop

Length/Depth

7KHJURXQGORRSVERUHKROHSLSHVKDYHEHHQ¿OOHGDQGSUHVVXUHWHVWHGLQDFFRUGDQFHZLWKUHOHYDQW%ULWLVK6WDQGDUGV

,IPRUHWKDQRQHFROOHFWRUKDVEHHQXVHGKDVWKHVVWHPEHHQKGUDXOLFDOOEDODQFHG)ORZEDODQFLQJUHJXODWLQJYDOYHV¿WWHG DGMXVWHG”

Has the system been vented/de-aired?

$UHVVWHP¿OWHUV¿WWHG FOHDQ”

Is the system topped up to the correct level?

:DVWKHVVWHPFOHDQHG ÀXVKHGSULRUWRXVH”

Are isolating valves in their correct position

What system cleaner was used?

Qty

What antifreeze was used?

Qty

What temperature will the antifreeze protect to?

What inhibitor was used (if not included in Antifreeze)?

Qty

5HFRUGLQFRPLQJFROOHFWRUÀXLGWHPSHUDWXUH

5HFRUGRXWJRLQJFROOHFWRUÀXLGWHPSHUDWXUH

m Yes Yes Yes Yes Yes Yes Yes litres litres °C litres °C °C

CENTRAL HEATING MODE Measure and Record

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? Hot water has been checked at all outlets

Unvented

Vented

Thermal Store

Yes

+DYH7KHUPRVWDWLF%OHQGLQJ9DOYHVEHHQ¿WWHG”

Yes

Not Connected 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

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 7RFRQ¿UPVDWLVIDFWRUGHPRQVWUDWLRQDQGUHFHLSWRIPDQXIDFWXUHU¶VOLWHUDWXUH

1RWHV>@,QVWDOOHUVVKRXOGEHPHPEHUVRIDQDSSURSULDWH&RPSHWHQW3HUVRQV6FKHPH>@$OOLQVWDOODWLRQVLQ(QJODQGDQG :DOHVPXVWEHQRWL¿HGWR/RFDO$UHD%XLOGLQJ&RQWURO/$%&HLWKHUGLUHFWORUWKURXJKD&RPSHWHQW3HUVRQV6FKHPH$ %XLOGLQJ5HJXODWLRQV&RPSOLDQFH&HUWL¿FDWHZLOOWKHQEHLVVXHGWRWKHFXVWRPHU>@0DEHUHTXLUHGIRUVVWHPVFRYHUHG E*5HJXODWLRQV
© Heating and Hotwater Industry Council (HHIC)

www.centralheating.co.uk

0020250181_00 geoTHERM Installation and maintenance instructions

59

Appendix

SERVICE RECORD

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 Interval Record below, please ensure you have carried out the service as described in the manufacturer’s LQVWUXFWLRQV$OZDVXVHWKHPDQXIDFWXUHU¶VVSHFL¿HGVSDUHSDUWZKHQUHSODFLQJFRQWUROV

SERVICE 01
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

SERVICE 02
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 03
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 04
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 05
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 06
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 07
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 08
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 09
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature
SERVICE 10
Engineer name: Company name: Telephone No: 2SHUDWLYH,’1R Comments:

Date:

Signature

Signature

60

Installation and maintenance instructions geoTHERM 0020250181_00

Index

Index
B Brine circuit
Filling ………………………………………………………………….. 18 Purging ……………………………………………………………….. 18 C Casing Fitting ………………………………………………………………….. 23 CE label ……………………………………………………………………. 10 Check programmes Using…………………………………………………………………… 29 Comfort protection mode…………………………………………….. 27 Competent person……………………………………………………….. 4 Connection diagram …………………………………………………… 21 D Data plate …………………………………………………………………. 10 DCF sensor ………………………………………………………………. 28 Design Heat pump …………………………………………………………….. 9 Disposal……………………………………………………………………. 30 Documents …………………………………………………………………. 8 E Electricity ……………………………………………………………………. 4 F Fault list, deleting ………………………………………………………. 28 Fault memory Querying ……………………………………………………………… 28 Fault memory, deleting……………………………………………….. 28 Front casing Fitting ………………………………………………………………….. 24 Removing…………………………………………………………….. 15 Frost damage Heating installation …………………………………………………. 5 Preventing……………………………………………………………… 5 Functionality ……………………………………………………………. 10 Heat pump …………………………………………………………….. 9 H Handing over to the end user ………………………………………. 27 Heat pump Connecting…………………………………………………………… 16 Protecting against frost ………………………………………….. 30 Heating installation Filling ………………………………………………………………….. 18 I Installation assistant Restarting ……………………………………………………………. 28 Installation assistant, ending ……………………………………….. 24 Installer level, calling up ……………………………………………… 25 Instructions Validity ………………………………………………………………….. 8 Intended use……………………………………………………………….. 6 L Live Monitor Calling up……………………………………………………….. 25, 28 M Maintenance message, checking …………………………………. 27 P Packaging…………………………………………………………………. 11 Product Cleaning………………………………………………………………. 28

Q Qualification………………………………………………………………… 4 Querying
Fault memory……………………………………………………….. 28 R Recycling………………………………………………………………….. 30 Regulations ………………………………………………………………… 7 S Safety device………………………………………………………………. 4 Schematic drawing ………………………………………………………. 4 Scope of delivery
Checking……………………………………………………………… 11 Service message, checking…………………………………………. 27 Side casing
Removing…………………………………………………………….. 15 Spare parts………………………………………………………….. 27, 29 Starting
Installation assistant ……………………………………………… 28 Statistics
Calling up…………………………………………………………….. 25 Status codes……………………………………………………………… 28 System
Filling ………………………………………………………………….. 18 T Terminal connection diagram ………………………………………. 21 Tool …………………………………………………………………………… 6 Transport ……………………………………………………………………. 5 Transport locks
Removing…………………………………………………………….. 15 Treating the heating water…………………………………………… 17 U Using
Check programmes ………………………………………………. 29 V Voltage ………………………………………………………………………. 4 W Wall-mounting …………………………………………………………… 14 Wiring diagram ………………………………………………………….. 21

0020250181_00 geoTHERM Installation and maintenance instructions

61

0020250181_00

0020250181_00 30.05.2017

Supplier Vaillant Ltd. Nottingham Road Belper Derbyshire Telephone 03301003461 info@vaillant.co.uk www.vaillant.co.uk

DE56 1JT

© These instructions, or parts thereof, are protected by copyright and may be reproduced or distributed only with the manufacturer’s written consent.
We reserve the right to make technical changes.

References

• centralheating.co
• Installers First
• Heizung? Entdecken Sie innovative Heizungen | Vaillant

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