Vaillant geoTHERM exclusive User manual

For the heating engineer
Installation instructions
geoTHERM exclusive
Heat pump with integrated domestic hot water cylinder
and additional cooling function
VWS
GB

Contents
Installation instructions for geoTHERM exclusive VWS 0020051614_002
Contents
Contents
1 Notes on the documentation........................... 3
1.1 Storage of the documents...................................... 3
1.2 Symbols used............................................................. 3
1.3 Applicability of the manual..................................... 4
1.4 CE label........................................................................ 4
1.5 Note to installers....................................................... 4
1.6 Intended use............................................................... 4
2 Description of the appliance ........................... 5
2.1 Data badge.................................................................. 5
2.2 Functional principle.................................................. 6
2.3 Design of the heat pump......................................... 7
2.4 General notes on operating modes and
functions...................................................................... 10
3 Safety instructions and regulations .............. 11
3.1 Safety instructions ................................................... 11
3.2 Regulations, rules, guidelines ............................... 12
3.3 Coolants....................................................................... 12
4 Assembly and installation............................... 13
4.1 Accessories................................................................. 13
4.2 Requirements of the installation site .................. 13
4.3 Dimensions and clearances.................................... 14
4.4 Assembly/Installation at a glance ........................ 15
4.5 Preparatory work in the installation area .......... 15
4.6 Requirements of the heating circuit.................... 16
4.7 Requirements for the domestic hot water
cylinder ....................................................................... 16
4.7.1 Cold water pipe pressure........................................ 16
4.7.2 Cold water piping...................................................... 17
4.7.3 Lines for primary circuit ......................................... 18
4.7.4 Laying of the discharge pipes................................ 18
4.7.5 High discharge point ................................................ 19
4.7.6 Drain valve.................................................................. 19
4.8 Scope of delivery ...................................................... 20
4.9 Unpacking the unit and checking the delivery .. 21
4.10 Transport of the heat pump................................... 21
4.10.1 Transport of the entire unit ................................... 21
4.10.2 Transport of the respective modules of the
heat pump................................................................... 22
4.11 Flap up the electric powered switch cabinet..... 23
4.12 Installing the heat pump ......................................... 24
4.13 On-site installation.................................................... 24
4.13.1 Assembly of the heating system........................... 25
4.13.2 Assembly of the brine circuit................................. 25
4.14 Fitting the VRC DCF outside temperature
sensor........................................................................... 26
4.15 Fitting the VR 90 remote control unit................. 26
4.16 Installing the VR 60 mixer module....................... 26
5 Filling the heating and heat source systems 27
5.1 Filling the heating circuit ........................................ 27
5.2 Filling of the brine circuit........................................ 28
5.3 Filling the DHW ciruit ............................................... 30
6 Electrical installation....................................... 31
6.1 Safety and installation information...................... 31
6.2 Regulations pertaining to electrical
installations ................................................................ 32
6.3 Electrical control box............................................... 32
6.4 Connecting the power supply ................................ 32
6.4.1 Unblocked mains supply (Electroplan 1).............. 33
6.4.2 Dual circuit feed, heat pump tariff
(Electroplan 2) ........................................................... 34
6.4.3 Dual circuit feed, special tariff (Electroplan 3) . 35
6.4.4 Connecting external components......................... 36
6.4.5 Simultaneous operation of the compressor
and the auxiliary heating ........................................ 36
6.5 Controller PCB at a glance..................................... 37
6.6 Wiring the controller PCB ....................................... 38
6.6.1 Connecting the VR 10 standard sensor............... 38
6.6.2 Shutting out of the heating circuit from the
cooling operation ...................................................... 38
6.6.3 Direct heating operation (Hydraulic plan 6) ...... 39
6.6.4 Mixer circuit with buffer cylinder
(Hydraulic plan 8) ..................................................... 40
6.7 Connecting the DCF receiver................................. 41
6.8 Connecting accessories........................................... 41
6.8.1 Installing the VR 90 remote control unit............ 41
6.8.2 Connecting further mixer circuits ........................ 42
6.8.3 Connecting vrnetDIALOG........................................ 42
6.9 Connecting an external boiler ............................... 43
6.10 Fitting the cladding and the operating panel .... 44
7 Start-up.............................................................. 46
7.1 General points regarding start-up........................ 46
7.2 Operating the controller ......................................... 46
7.2.1 Finding your way around the controller ............. 46
7.2.2 Calling up the screens ............................................. 47
7.2.3 Typical operating sequence on the operator
level .............................................................................. 47
7.3 Carrying out the initial commissioning ............... 47
7.4 Bleeding the brine circuit........................................ 48
7.5 Bleeding the heating circuit................................... 48
7.6 Handing the system over to the operator.......... 48
8 Controller........................................................... 49
8.1 Operating modes and functions............................ 49
8.2 Automatic auxiliary functions................................ 49
8.3 Settable auxiliary functions.................................... 50
8.3.1 Auxiliary functions in the Operator Level .......... 50
8.3.2 Auxiliary functions in the Code Level.................. 50
8.3.3 Auxiliary functions via vrDIALOG ......................... 51
8.4 Description of the controller.................................. 51
8.4.1 Possible system circuits.......................................... 51
8.4.2 Energy balance controller ...................................... 51
8.4.3 Charging principle buffer cylinder........................ 52
8.4.4 Resetting to factory settings................................. 52
8.4.5 Controller structure ................................................. 52
8.5 Operator level sequence diagram ........................ 53
8.6 Code level sequence diagram................................ 54

3geoTHERM exclusive VWS 0020051614_00 installation instructions
1 Notes on the documentation
The following notes are intended as guidance through-
out the entire documentation.
Further documents apply in combination with this instal-
lation manual.
We accept no liability for any damage caused by fail-
ure to observe these instructions.
Other applicable documents
Buffer cylinder VPS installation instructions
no. 0020011995
Installation Manual for vrnetDIALOG no. 839117
The manuals for any accessories and controllers used
also apply.
1.1 Storage of the documents
Please pass this installation manual and all other valid
documents on to the owner of the installation in order
for him or her to store it so that it is available whenever
it is required.
1.2 Symbols used
Please observe the safety instructions in this installation
manual for the installation of the appliance.
dDanger!
Immediate risk of serious injury or
death!
eDanger!
Danger of death by electric shock!
HDanger!
Danger of burning and scalding!
aCaution!
Potentially dangerous situation for the
product and environment.
hNote!
Useful information and instructions.
• Symbol for a necessary task
Contents
Notes on the documentation 1
8.7 Displays in the operator level................................ 56
8.8 Displays in the code layer....................................... 61
8.9 Installer Menu ............................................................ 69
8.10 Parameters that can be set with vrDIALOG 810/2 71
9 Inspection and maintenance ........................... 73
9.1 Notes for maintenance............................................ 73
9.2 Carrying out the maintenance work .................... 73
9.3 Test operation and restarting................................ 73
10 Troubleshooting and diagnosis ....................... 73
10.1 Error messages on the controller......................... 73
10.2 Malfunctions of eBUS components ...................... 74
10.3 Displays in the error memory and under
"Warning message".................................................. 74
10.4 Temporary shut-down ............................................. 74
10.5 Blocking error ............................................................ 76
10.6 Other errors/malfunctions ..................................... 78
11 Recycling and disposal..................................... 79
11.1 Appliance..................................................................... 79
11.2 Packaging.................................................................... 79
11.3 Coolants....................................................................... 79
12 Warranty and customer service ..................... 79
12.1 Vaillant warranty....................................................... 79
12.2 Vaillant Service.......................................................... 79
13 Technical data................................................... 80
14 Start-up checklist............................................. 82
15 Reference........................................................... 84
Appendix ....................................................................... 87
Sensor characteristics.......................................................... 87
VRC-DCF outside temperature sensor............................. 88
Heat pump schematic........................................................... 89
Electrical circuit diagram .................................................... 90

Installation instructions for geoTHERM exclusive VWS 0020051614_004
1.3 Applicability of the manual
These installation instructions apply exclusively to appli-
ances with the following part numbers:
Type name Article number
VWS 63/2 230V GB 0010007274
VWS 83/2 230V GB 0010007275
VWS 103/2 230V GB 0010007276
Table 1.1 Type designations and article numbers
The part number of the equipment can be taken from
the identification plate.
1.4 CE label
As equipment manufacturer, we confirm with the CE
label that the units in the geoTHERM exclusive range
satisfy the basic requirements of the following guide-
lines:
– Electromagnetic Compatibility Directive (Council Di-
rective 89/336/EEC)
– Low voltage directive (73/23/EEC)
– EN 14511 (heat pumps with electrically-driven compres-
sors for heating, specifications for appliances for
space heating and for warming drinking water)
– EN 378 (safety and environmentally related specifica-
tions for refrigerating systems and heat pumps)
1.5 Note to installers
This product has been assessed and found to comply
with the requirements of the Building Regulations for
unvented hot water storage systems and must not be
altered or modified in any way.
The installation must be carried out by a competent per-
son and be accordance with the relevant requirements
of the Local Authority, Building Regulations, Building
Regulations (Scotland), Building Regulations (Nothern
Ireland), and the bye-laws of the of the local Water Un-
dertaking. The installion is subject to Building Regula-
tion approval, notify the Local Authorita of intention to
install. In the event of parts replacement, use only genu-
ine spare parts supplied by Vaillant Ltd.
1.6 Intended use
The Vaillant geoTHERM exclusive heat pumps are state-
of-the-art appliances which have been constructed in
accordance with recognised safety regulations. Never-
theless, there is still a risk of death or serious injury to
the user or others or of damage to the device and other
property in the event of improper use or use for which it
is not intended.
This unit is not intended for use by persons (including
children) having limited physical, sensory or mental ca-
pacities or who have inadequate experience and/or
knowledge, unless supervised by a person responsible
for their safety or who has been given instructions from
them as to how to operate the unit.
Children must be supervised to ensure that they do not
play with the unit.
The units are intended as heat generators for closed
hot-water central heating installations, for cooling oper-
ation and for hot water generation. Any other use or ex-
tended use is considered to be improper. The manufac-
turer or supplier is not liable for any resulting damage.
The user alone bears the risk.
The appliances are intended for operation on a power
supply network with a system impedance Zmax at the
transfer point (house connection) of 0.16 ohms maxi-
mum.
Intended use includes the observance of the installation
manual.
aCaution!
Any improper use is forbidden.
The appliances must be installed by a heating engineer,
who is responsible for adhering to the existing regula-
tions, rules and guidelines.
1 Notes on the documentation

5geoTHERM exclusive VWS 0020051614_00 installation instructions
2 Description of the appliance
2.1 Data badge
In the case of geoTHERM exclusive heat pump, an iden-
tification plate is fixed inside to the bottom plate. The
type designation is located at the top of the grey pillar
frame.
R407 C
COP B0/W35 4,2
COP B5/W55 3,0
B0/W35
B5/W55
1/N/PE 230V 50Hz
IP 20
Vaillant GmbH Remscheid / Germany
1/N/PE 230V 50Hz
1/N/PE 230V 50Hz
6,8 kW
2,8 kW
2 / 4 kW
< 45 A
1,9 kg
2,9 (29) MPa (bar)
6,0 kW
6,3 kW
VWS 63/2 230 V
IT FR NO LV LT EE ES UK
Serial-No. 21054500100028300006000001N1
21054500100028300006000001N4
16 A
175 I
1 (10) MPa (bar)
Fig. 2.1 Example of an identification plate
Explanation of the symbols on the identification plate
Rated voltage - compressor
Rated voltage - pumps + controller
Rated voltage - auxiliary heating
Rated maximum power
Rated power - compressor, pumps
and controller
Rated power - auxiliary heating
Start-up current without start-up
current limiter
16 A Start-up current with start-up cur-
rent limiter
Service water tank capacity
Permissible rated overpressure
Coolant type
Filling quantity
Permissible rated overpressure
COP B0/W35 Performance figure at a brine tem- perature of 0 °C and a heating flow
temperature of 35 °C
COP B5/W55 Performance figure at a brine tem- perature of 5 °C and a heating flow
temperature of 55 °C
B0/W35 Heating output at a brine tempera- ture of 0 °C and a heating flow
temperature of 35 °C
B5/W55 Heating output at a brine tempera- ture of 5 °C and a heating flow
temperature of 55 °C
CE mark
VDE/GS mark
Read the Operating and Installation
Manual!
Humidity protection class
Ensure proper disposal at the end
of its useful life (not household
waste)
21054500100028300006000001N4
Serial Number
Table 2.1 Explanation of symbols
Description of the appliance 2

Installation instructions for geoTHERM exclusive VWS 0020051614_006
2.2 Functional principle
Heat pump systems consist of separate circuits in which
liquids or gases transport the heat from the heat source
to the heating system. As these circuits operate with
differing media (brine/water, coolant and heating
water), they are coupled to one another by means of
heat exchangers. In these heat exchangers the heat
passes from a medium at a high temperature to a medi-
um at a lower temperature.
The Vaillant geoTHERM heat pump is loaded with geo-
thermal energy as its heat source.
3/4 Environmental energy 4/4 Heating energy
1/4 Electrical energy
Fig. 2.2 Using a geothermal heat source
Auxiliary
heating Domestic hot water cylinder
Heating water circuit
Heat source circuit
Coolant circuit
Hot water
Cold water
Switching valve
Heating water pump
Condenser
Heat source
Brine pump
Evaporator
Compressor
Expansion valve 2
1
3
4
Heating
system
Cooling heat exchanger
Mixer valve
Diverter valve
Fig. 2.3 Principle of operation of the heat pump
The system consists of separate circuits which are cou-
pled to one another by means of heat exchangers.
These circuits are:
- The heat source circuit, by means of which the energy
from the heat source is transported to the coolant cir-
cuit.
- The coolant circuit, which releases its heat to the
heating water circuit by means of evaporation, com-
pression, liquefaction and expansion.
- The heating water circuit, which supplies the heating
and the hot water generation for the domestic hot
water cylinder.
The coolant circuit is connected by means of the evapo-
rator (1) to the environmental heat source, from which it
extracts thermal energy. At the same time, the physical
state of the coolant changes; it evaporates. The coolant
circuit is connected by means of the condenser (3) to
the heating system, to which it releases the heat again.
In so doing, the coolant becomes liquid again; it con-
denses.
As thermal energy can only pass from a body at a high-
er temperature to a body at a lower temperature, the
coolant in the evaporator must have a lower tempera-
ture than the environmental heat source. On the other
hand, the temperature of the coolant in the condenser
must be higher than that of the heating water in order
to be able to release the heat to it.
2 Description of the appliance

7geoTHERM exclusive VWS 0020051614_00 installation instructions
These different temperatures are produced in the cool-
ant circuit by means of a compressor (2) and an expan-
sion valve (4), which are situated between the evapora-
tor and the condenser. The coolant flows in vapour form
from the evaporator into the compressor, where it is
compressed. This causes the pressure and temperature
of the coolant vapour to rise sharply. After this process
it flows through the condenser, where it releases its
heat to the heating water by condensation. It flows as a
liquid to the expansion valve, where it expands signifi-
cantly and in so doing loses much of its pressure and
temperature. This temperature is now lower than that
of the brine which flows through the evaporator. The
coolant can thus take up more heat in the evaporator,
turning into vapour in the process and flowing to the
compressor. The cycle starts again.
If required, the electric auxiliary heating can be
switched in by means of the integrated controller.
To prevent the formation of condensate in the interior
of the unit, the pipes of the heat source circuit and the
coolant circuit are insulated. Should condensate appear,
however, it is collected in a pan inside the unit (see
Fig. 2.7) and fed away underneath it. Drop formation
under the unit is thus possible.
The Vaillant geoTHERM exclusive heat pumps are
equipped with an auxiliary cooling function in order to
provide for comfortable, cool room temperatures in the
living room at high outside temperatures during the
summer operation. For this purpose, additional compo-
nents are necessary in the heat pump hydraulics: an
auxiliary intermediate heat exchanger, an additional
mixer valve and an auxiliary diverter valve. In the case
of Vaillant heat pumps with cooling functions, the princi-
ple of "passive" cooling is applied, in which heat is
transported via an underfloor heating from the rooms
to the ground without compressor operation and there-
fore, without cold circuit operation. The heating circuit
water, which is colder than the room temperature ab-
sorbs heat from the room and is pumped via the heat
circulation pump into the intermediate heat exchanger.
The brine pump also conveys the colder brine from the
ground into the heat exchanger which is operated in the
counter flow principle. In the process, the warmer heat-
ing return emits heat to the colder brine circuit, so that
the brine which is heated to some degree is guided
again to the floor. The annealed heating flow circulates
again through the circuit of the underfloor heating
where the water can reabsorb heat from the surround-
ings. Thus, the circuit can start over again.
2.3 Design of the heat pump
A 175 litre domestic hot water cylinder is integrated in
the geoTHERM exclusive heat pump. The Vaillant
geoTHERM heat pump is available in the types listed
below. The heat pumps are, above all, different from
each other in their output.
Type name Heating output (kW)
Brine water heat pumps (S0/W35)
VWS 63/2 230V GB 6.0
VWS 83/2 230V GB 8,1
VWS 103/2 230V GB 10.5
Table 2.2 Type summary
You can read the type designation of the heat pump
from the sticker (see Fig. 2.5, Item 1) on the pillar frame.
The heat pump is designed to implement all current
electrical supply tariffs.
The heat pump is dismantled into two modules in order
to ease transport to the site of installation (see also
chapter 4.10):
– the domestic hot water cylinder module (1)
– the heat pump module (2)
Fig. 2.4 Dismountable module of the heat pump geoTHERM ex-
clusive
Description of the appliance 2

Installation instructions for geoTHERM exclusive VWS 0020051614_008
2
3
1
Fig. 2.5 Front view
Key to Fig. 2.5
1 Label with heat pump type designation
2 Operating panel
3 vrnetDIALOG mounting plate (behind the pillar cladding)
4
3
1
2
6
5
9
8
7
Fig. 2.6 Rear view
Key to Fig. 2.6
1 Hot water connection of domestic hot water cylinder
2 Cold water connection of domestic hot water cylinder
3 Heat source to the heat pump
4 Heat source from the heat pump
5 Heating return
6 Heating feed
7 Handle trough
8 Handle trough/cable duct electric terminal box
9 Ventilation of heating flow to the domestic hot water cylinder
2 Description of the appliance

9geoTHERM exclusive VWS 0020051614_00 installation instructions
Assemblies
1
2
3
4
6
5
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Fig. 2.7 Front view, covers removed
Key to Fig. 2.7
1 Conduit duct
2 Hot water cylinder
3 Electric powered switch cabinet
4 Controller printed circuit board (below the cover plate)
5 Safety thermostat STB for the auxiliary heating
6 Power supply connection
7 3-way changeover valve - cooling
8 3-way valve heating/cylinder charging
9 Electrical auxiliary heating
10 Brine mixing valve
11 Heating circuit pump
12 Charging and purging valve for heating circuit
13 Identification plate (fixed to the condensate tray)
14 Charging and purging valve for brine circuit
15 Heat exchanger cooling system
16 Compressor
17 Handle trough (on the rear side)
18 Expansion valve
19 Condensate tray
20 Brine pump
21 Evaporator
22 Condenser
Description of the appliance 2

Installation instructions for geoTHERM exclusive VWS 0020051614_0010
2.4 General notes on operating modes and func-
tions
There are five operating modes available for the heating
circuit and these can be used for time and temperature
control of the heat pump (see Chap. 8 "Control sys-
tem").
There are a further three operating modes available for
the integrated domestic hot water cylinder.
During start-up, you will tell the heat pump which of the
connection configurations listed in the appendix corre-
sponds to your installation by entering the number of
the corresponding hydraulic plan into the controller.
Thus all the operating parameters will be set to prede-
termined values, so that the heat pump can work opti-
mally. However, you can individually set and adapt the
operating modes and functions afterwards.
You will find all the information on operating modes,
auxiliary and special functions in Chapter 8, "Control
system".
The heat pump is equipped with numerous automatic
auxiliary functions to ensure trouble-free operation
(see also Chap. 8.2 "Automatic auxiliary functions"):
– Frost protection
Prevents the heating system from freezing
– Tank frost protection
Prevents the connected tanks from freezing
– Checking the external sensors
Checking the connected sensors during initial commis-
sioning using the basic hydraulic circuit that was en-
tered previously
– Protection against loss of heating water
Shuts down when there is a loss of heating water and
switches on again when there is sufficient water pres-
sure
- Protection against loss of brine
Shuts down if the brine pressure is too low and
switches on again when the pressure is sufficient
– Floor protection circuit
Overheating protection for the floor (important for
wooden floors)
– Pump blocking protection
Prevents seizing of pumps in the system
- Freeze protection function
Shuts down the compressor if the temperature of the
heat source falls below a predetermined value
Additionally, there are further settable auxiliary func-
tions available (see also Chap. 8.3 "Settable auxiliary
functions"):
– Timer programmes
To set the heating times for each heating circuit
– Holiday programming
Programming of two holiday periods with date entry
and set-back temperature
– Party function
Carries the heating and hot water times forward to
the next shut-off point
– Energy saving function
Lowers the flow setpoint temperature for a adjustable
period
– Screed floor drying
For drying out screed floors
– Fixed value controlling
Sets a fixed flow temperature
– Anti-Legionella function
Kills germs in the tank and in the pipes
– Quick test
Test function for maintenance
– Remote maintenance
Diagnostics and setting via vrDIALOG or
vrnetDIALOG
–Cooling function
Cooling of the living rooms during the summer opera-
tion
2 Description of the appliance

11geoTHERM exclusive VWS 0020051614_00 installation instructions
3 Safety instructions and regulations
3.1 Safety instructions
The heat pump must be installed by an approved techni-
cian, who will be responsible for adhering to the existing
standards and regulations. We accept no liability for any
damage caused by failure to observe these instructions.
Find out the transport and operating weights of the heat
pump from the Technical Data and take heed of them
during transportation and installation. Pay particular at-
tention to Chap. 4.2, "Requirements of the installation
site", before assembly.
dDanger!
The coolant circuit is pressurised. Fur-
thermore, high temperatures can arise.
The appliance may only be opened and
serviced by Vaillant factory customer
service or by a qualified specialist tech-
nician. Work on the coolant circuit may
only be carried out by a qualified refrig-
eration engineer.
eDanger!
Risk of electric shock!
Always switch off all power supplies be-
fore carrying out any electrical installa-
tion or servicing work. Make sure that
they are secured against inadvertent
switching on again.
aCaution!
Risk of damage!
Do not add any antifreeze or corrosion
protection agents to the heating water,
as seals and other components can be
damaged as a result and this can lead to
water leaks.
You should soften the heating water if the water hard-
ness is above 3.0 mmol/l (21,05 °e). You can use the
Vaillant ion exchanger (Art. No. 990 349) for this pur-
pose. Observe the enclosed instructions for use.
aCaution!
Condensate formation!
geoTHERM exclusive heat pump must
not be operated in connection with a
buffer cylinder. The condensed water
that emerges during the cooling opera-
tion can damage the buffer cylinder via
corrosion.
aCaution!
Danger of falling below the dew point and
condensate formation!
· All the pipes of the heating circuit
must be insulated leak-proof against
vapour diffusion.
· Radiator heatings are not suitable for
the operation with a Vaillant heat
pump geoTHERM exclusive.
aCaution!
Damage of the cooling function by using
planar collector!
The insertion of a ground sensor is man-
datory during the operation of a Vaillant
heat pump with cooling function.
aCaution!
Danger of falling below the dew point and
condensate formation!
The heating flow temperature must not
be set too low in the cooling mode. Ade-
quate cooling function is also guaranteed
in a flowtemperature of 20 °C.
hNote!
Damage of the cooling function by closed
thermostatic radiator valves.
In the cooling mode, the thermostats
must be switched to "open" in order to
be able to guarantee an uninterrupted
circulation of annealed heating water in
the ground floor circuit.
Safety instructions and regulations 3

Installation instructions for geoTHERM exclusive VWS 0020051614_0012
3.2 Regulations, rules, guidelines
As part of the installation, commissioning and operation
of the heat pump and the DHW storage you must take
into account the current versions of the following regu-
lations or standards, along with any local directives or
guidelines that may apply.
– Electricity at work act.
– Health and safety at work act
– Relevant Utility supplier’s regulations.
– Water regulations and by-laws.
– Environment agency and local council requirements
regarding bore holes, water courses, or noise levels.
– Gas safety installation and use regulations concerning
any associated gas fired heat source used within the
heating system.
– Building regulations part “L” and directives concern-
ing energy saving
– Building regulations such as G3 covering Hygiene and
L8 Legieonella.
– COSHH regulations
– Other relevant bodies such as HETAS and OFTEC
3.3 Coolants
The heat pump is delivered with an operational filling of
R 407 C coolant. This is a chlorine-free coolant which
does not affect the Earth's ozone layer. R 407 C is nei-
ther a fire hazard nor an explosion risk.
However, maintenance work and interventions into the
coolant circuit may only be undertaken by an expert
technician with appropriate protective equipment.
dDanger!
R 407 C coolant!
Do not inhale gases or vapours emanat-
ing from leaks in the coolant circuit.
Risk to health! Avoid contact with the
skin and eyes. Escaping coolant can
cause freezing if the exit point is
touched! R 407 C coolant presents no
danger in normal use and under normal
conditions. With improper use, however,
it can cause injury and damage.
aCaution!
This appliance contains R 407 C coolant.
The coolant must not be allowed to es-
cape into the atmosphere. R 407 C is a
fluorinated greenhouse gas covered by
the Kyoto Protocol, with a GWP of 1653
(GWP = Global Warming Potential).
Before the appliance is disposed of, the
coolant it contains must be completely
drained into a suitable vessel so that it
can then be recycled or disposed of in
accordance with the regulations.
The relevant work in connection with the
coolant may only be carried out by offi-
cially certified specialists.
Draining or filling with new coolant (see
identification plate for quantity) may
only be carried out via the service
valves. All warranties become void if any
approved replacement coolant other
than the R 407 C recommended by Vail-
lant is used.
aDanger!
Danger of lack of tightness by using po-
tassium carbonate as brine lotion!
Insertion of potassium carbonate/water
as brine lotion is not allowed because it
can amount to interactions with the in-
stalled seal synthetic materials in the
brine mixing valve.
3 Safety instructions and regulations

13geoTHERM exclusive VWS 0020051614_00 installation instructions
4 Assembly and installation
4.1 Accessories
You can fit the following accessories to expand the heat
pump system. You can find more detailed information
on the installation of accessories in Chap. 5.9.
Information on potentially required accessories.
Please see the current price list.
Mixer module VR 60
With the mixer module, you can expand the control sys-
tem of the heating installation by two mixer circuits.
You can connect a maximum of six mixer modules.
VR 90 remote control unit
A separate remote control device can be connected for
the first eight heating circuits (heat zone 1 - heat
zone 8).
VR 10 standard sensor
Additional sensors may be required, e.g. as flow, return,
collector or cylinder sensors, depending on the configu-
ration of the system.
vrDIALOG 810/2
vrDialog is a communications unit with software and
connecting cable which enables you to carry out diagno-
sis, monitoring and parameter setting on the heat pump
from a computer.
vrnetDIALOG 840/2, 860/2
The vrnetDIALOG communications unit enables you to
carry out remote diagnosis, monitoring and parameter
setting on the heat pump from a computer over a tele-
phone connection or via an integrated GSM modem.
VPS heating water buffer cylinder
The buffer cylinder VPS functions as buffer store for
heating water and can be mounted between the heat
pump and the heating circuit. It provides the required
energy to bridge the cut-off times of the supply unit op-
erator (VNB)
4.2 Requirements of the installation site
Install the geoTEHRM heat pump with integrated domes-
tic hot water cylinder in a suitable position in the build-
ing and at the same time, pay attention to the following:
– Choose a dry room that is generally frost-proof. A
frost protection thermostat must be installed if neces-
sary.
– The floor must be level and sufficiently stable to be
able to bear the weight of the heat pump, together
with the DHW and possibly a buffer tank.
– Floor unevenness should be able to be levelled from
the adjustable feet of geoTHERM heat pump
– An appropriate water supply pipe can be connected
directly from the mains water stop valve of the build-
ing with the geoTHERM heat pump.
– It must be possible to install suitable pipe conduits
(for heat source, DHW and heating).
– The discharge pipe from the tundish must be installed
at a minimum slope of 1:200 and end at a safe and vis-
ible point, see section 4.7, "Requirements for the do-
mestic hot water cylinder".
– There must be enough room for the assembly, check-
ing and pressure build-up of the expansion vessel.
– When choosing the installation site, bear in mind that
when operating, the heat pump can transmit vibra-
tions to the floor or nearby walls.
– In accordance with DIN EN 378 T1, the minimum size
of the installation space for heat pumps, (Vmin), is cal-
culated as follows:
Vmin = G/c
G = coolant fill quantity in kg
c = practical limit in kg/m3
(for R 407C c = 0.31 kg/m3)
This yields the following minimum installation space:
Heat pump type Coolant fill
quantity [kg] Minimum installation space [m3]
VWS 63/2 230V GB 1.9 6.1
VWS 83/2 230V GB 2.2 7.1
VWS 103/2 230 V GB 2.05 6.6
Table 4.1 Minimum installation space
Assembly and installation 4

Installation instructions for geoTHERM exclusive VWS 0020051614_0014
4.3 Dimensions and clearances
1800
600 0-10 1)
90
18
835
650
696
600
75
75
260
12 280
Fig. 4.1 Dimensions and clearances
1) Adjustable feet adjustable in height by 10 mm
4 Assembly and installation

15geoTHERM exclusive VWS 0020051614_00 installation instructions
300 mm
300 mm
600 mm
300 mm
300 mm
Fig. 4.2 Minimum clearances for installing the heat pump
4.4 Assembly/Installation at a glance
– Remove packing material.
– Remove transportation safety devices.
– If necessary, separate the domestic hot water cylinder
module and the heat pump module.
– Transport the heat pump to the installation room.
– If necessary, mount the domestic hot water cylinder
module and the heat pump module on top of each
other.
– Position and align the heat pump in the intended as-
sembly location.
– Tilt up the electric powered switch cabinet
– Connect the on-site piping.
– Carry out the electrical installation.
– Fill the heating circuit.
– Fill the heat source circuit.
– Fit the cladding.
– Fit the operating console.
– Carry out the initial commissioning.
– Fill out the start-up checklist.
– Hand over system to the user and familiarise him with
it.
4.5 Preparatory work in the installation area
1
1
23
3
Fig. 4.3 Preparatory work in the installation area
• Make sure that the substrate is sufficiently stable (see
Chap. 4.2 "Requirements for the installation site“).
• Make at least two bore holes, bearing in mind the di-
mensions of the unit and its connections (1).
• Each pipe from the heat source requires its own bore
hole.
• Special pipe fairleads must be used if there is a risk of
ground water penetration (follow the manufacturer's
instructions).
• Take account of the distances to the core barrels for
the rest of the installation.
• Pass the heat source pipes (2) from the outside into
the installation area.
• Lay the heat source pipes (2) centrally in the bore
holes (1) to facilitate all-round thermal insulation.
• Seal the annular gap (1) as shown with foam insulation
(e.g. PE foam) (3).
• Insulate the heat source pipes in cellar areas against
vapour diffusion, as condensation will otherwise accu-
mulate (pipe temperature can be as low as -15 °C).
Assembly and installation 4

Installation instructions for geoTHERM exclusive VWS 0020051614_0016
4.6 Requirements of the heating circuit
aCaution!
Danger of falling below the dew point and
condensate formation!
All the pipes of the heating circuit must
be insulated leak-proof against vapour
diffusion.
Radiator heatings are not suitable for
the operation with a Vaillant heat pump
geoTHERM exclusive.
aCaution!
Danger of falling below the dew point and
condensate formation!
The heating flow temperature must not
be set too low in the cooling mode. Ade-
quate cooling function is also guaranteed
in a flowtemperature of 20 °C.
The heat pump is only suitable for connection to a
closed central heating installation. To ensure trouble-
free operation, the central heating installation must
have been installed by authorised specialists in compli-
ance with the applicable regulations.
A heat pump is suited to low temperature heating sys-
tems. The system must therefore be designed for low
flow temperatures (ideally around 30 to 35 °C). Further-
more, it must be ensured that power company outages
are bridged over.
EN 12828 requires the following the heating system in-
stallation:
– a filling valve, in order to fill the heating system with
water or be able to drain the water,
– a diaphragm expansion vessel in the return line of the
heating circuit,
– an overpressure safety valve (opening pressure 3 bar)
with pressure gauge (safety group) in the flow line of
the heating circuit, immediately after the appliance,
– an air/dirt separator in the return line of the heating
circuit.
To avoid energy losses in accordance with the Energy
Saving Order (EnEV) and to protect against freezing, all
connection lines must be provided with thermal insula-
tion.
The pipes must be dirt free - if necessary, flush them
thoroughly before filling.
aCaution!
Risk of damage!
Do not add any antifreeze or corrosion
protection agents to the heating water,
as seals and other components can be
damaged as a result and this can lead to
water leaks.
In hydraulic installations that are predominantly
equipped with thermostatically or electrically controlled
valves, it is necessary to ensure a constant, adequate
flow through the heat pump. Regardless of the choice of
heating system, the nominal flow rate of heating water
must be ensured.
4.7 Requirements for the domestic hot water
cylinder
4.7.1 Cold water pipe pressure
The performance of unvented domestic hot water cylin-
der depends on the available water pipe pressure and
the percolation rate. In order to attain the optimal
power of the integrated domestic hot water cylinder of
the geoTHERM heat pump, an appropriate cold water
pipe must be available, i.e. the measured static line
pressure must be at least 2.0 bar. A corresponding flow
rate of at least 20 - 25 l/min should be available.
hNote!
The mains water pressure is reduced
during periods of high water consump-
tion. Make sure that the measurements
are carried out this time.
Example:
The available percolation rate of mixed water of 40 °C
is 25 l/ min (15 l/min hot water of 60 °C from the do-
mestic hot water cylinder with 10 l/min cold water of
10 °C) if the measured static cold water line pressure is
2 bar and the available percolation rate is 30 l/min.
The domestic hot water cylinder operates satisfactorily
as well during a water line pressure below 2 bar, but at
a reduced percolation rate. The unvented domestic hot
water cylinder should not be installed if the water line
pressure is below 1 bar. You can obtain information on
alternative hot water supply systems from Vaillant Ltd.
To keep the friction losses at a minimum, a minimum di-
ameter of 22 mm is recommended for the cold water
pipe in the building; however, a satisfactory power can
still be obtained with a 15 mm line.
4 Assembly and installation

17geoTHERM exclusive VWS 0020051614_00 installation instructions
4.7.2 Cold water piping
243
B
1
A
Fig. 4.4 Safety assembly
Key to Fig. 4.4
A Cold water connection
B Cylinder connection
1 Expansion relief valve
2 Pressure limiting valve with line strainer
3 Hot water expansion tank connection
4 Balanced pressure cold water connection
• When installing the valves, make sure they are aligned
in such a way that the 15 mm connection of the expan-
sion relief valve (figure 4.5) can be connected to the
tundish.
• Install the discharge pipe of the expansion relief valve
(figure 4.4) with a constant outward inclination. The
drain pipe must end in a safe and visible point where
there is no risk of freezing.
aCaution!
Risk of bursts for the domestic hot
water cylinder due to overpressure!
The outlet of the expansion relief valve
may not be covered or closed.
• Control the expansion relief valve (figure 4.4 item 1)
regularly to avoid calcification.
• Connect the domestic hot water cylinder to the cylin-
der connection (figure 4.4 item B).
To ensure an optimum performance of the domestic hot
water cylinder, especially during installations in which
the pressure-controlled cold water connection (fig-
ure 4.4 item B) is used, copper pipes with a diameter of
at least 22 mm should be used for the pipe from the
main stop valve of the building to the domestic hot
water cylinder.
• Install the drain valve in the cold water pipe at the
lowest point between the domestic hot water cylinder
and the safety group
• Install the assembled safety group in the cold water
pipe in a suitable location next to the domestic hot
water cylinder. Make sure there is sufficient space for
maintenance and the connection of the discharge pipe
from the expansion relief valve.
If the discharge pipes are all together, the expansion re-
lief valve may not be installed more than 500 mm away
from the temperature and pressure compensating valve.
aCaution!
Danger of bursting for the domestic hot
water cylinder!
No stop valve should be installed be-
tween the safety group and the cylinder.
The Vaillant geoTHERM heat pump with integrated do-
mestic hot water cylinder is supplied with an external
hot water expansion vessel (ADG).
Connect this expansion vessel to the installed safety as-
sembly as follows:
• Bolt the expansion vessel via the connection intended
for this purpose (figure 4.4 item 3) directly onto the
safety group or
• Connect the expansion vessel to the water control
pack with a copper pipe or an appropriate hose. Make
sure the expansion vessel is supported sufficiently.
Use the supplied mounting bracket if the expansion ves-
sel is to be mounted on the wall.
• Establish (if necessary) the connection to the cold
water connection with pressure compensation of the
safety group (figure 4.4 item B).
hNote!
In areas with high water pressure (4 bar
or more), a bath or shower mixer valve
can also be connected to the balanced
pressure cold water connection (figure
4.4 item 5) of the safety group. This is
to ensure that the pressure of the hot
and cold water supply to the mixer valve
is about the same. The cold water supply
for all other connections should be in-
stalled by means of a T piece to the do-
mestic hot water cylinder in front of the
safety group in the cold water pipe.
Assembly and installation 4

Installation instructions for geoTHERM exclusive VWS 0020051614_0018
4.7.3 Lines for primary circuit
The lines for the primary circuit of the Vaillant heat
pump geoTHERM to the domestic hot water cylinder un-
iSTOR should be made of copper and should have a min-
imum diameter of 22 mm.
Lines with bigger diameters must possibly be used if the
distance between the heat pump and the cylinder is too
big. It is not necessary to design a circulation pump for
these lines because the Vaillant is equipped with heat
pump via an integrated circulation pump.
4.7.4 Laying of the discharge pipes
The discharge connections of the temperature/pressure
compensation valve as well as of the safety valve must
be connected via 15 mm copper pipes with the supplied
drain hopper. The tundish should be installed vertically
as close to the appliance as possible and within 500 mm
of the temperature and pressure relief outlet. It must be
positioned away from any electricl components an din-
stalled in the same space as the geoTHERM eclusive, so
that it is vislible to the user. The discharge pipe from
the temperature-/pressure compensation valve and
from the safety valve can be joined via a T piece above
the tundish.
The drain pipe from the 22-mm connection of the
tundish must be laid to a safe and visible outlet with
copper pipe with at least 22 mm diameter.
A vertical line section which is at least 300 mm long
must be below the tundish, before the line reaches a
curve. If the total drag of the drain pipe exceeds the val-
ues specified in table 4.2 below, the line diameter must
be increased. During the installation of the drain pipe,
the G3 specification must be observed.
The cylinder relief valve connections should not to be
used for any other purpose.
Minimum diame-
ter of the drain-
pipe from the
tundish
Maximum permissi-
ble total drag, con-
veyed as a straight
length of pipe (with-
out elbows or deflec-
tions)
Resistance as a
result of every
elbow and deflec-
tion respectively
22 mm up to 9 m 0.8 m
28 mm up to 18 m 1.0 m
35 mm up to 27 m 1.4 m
Table 4.2 Maximum permissible tube length
Examples:
22-mm drainpipe with 4 elbows and 7 m length of
tundish up to the drain:
Resistance for 4 elbows
0.8 m each = 3.2 m
Resistance for discharge pipe = 7.0 m
Total resistance = 10.2 m
The total resistance of the drain pipe is more than
the permissible maximum value (9 m) for 22-mm
pipe. Base your calculations therefore on the next
largest pipe diameter.
28-mm drainpipe with 4 elbows and 7 m length of the
tundish up to the drain:
Resistance for 4 elbows
1.0 m each = 4.0 m
Resistance for discharge pipe = 7.0 m
Total resistance = 11.0 m
The total drag of the drain pipe is lower than that for
the 28 mm lines permissible maximum value (18 m);
thus, this line diameter is suitable.
metal discharge pipe from
temperature relief valve to
tundish
metal discharge pipe
from tundish with
continuous fall
tundish
discharge below
fixed grating
fixed grating
trapped
gully
safety device
(e. g. temperature
relief valve
ventil)
500 mm
minimum
300 mm
minimum
Fig. 4.5 Typical drainage installation
Water which is almost boiling may escape from the dis-
charge pipe in the event of an error.
4 Assembly and installation

19geoTHERM exclusive VWS 0020051614_00 installation instructions
HDanger!
Danger of scalding by withdrawing
water!
Make sure the discharge pipe ends at a
safe point inside or outside the building
(safe and visible), where there is no risk
of anyone coming in contact with hot
water.
A suitable point is, for example, under a fixed grating
above the trap of a trapped gully. Low discharge pipes,
for example up to 100 mm above external surfaces, such
as car and other parking spaces, grasslands etc., can be
used, provided they are secured by a wire fence or
something similar to prevent children from coming in
contact with the waste water, and as long as the system
is not visible. No valves or taps may be installed in the
discharge pipe.
• Make sure that the drain pipe from the tundish to the
drain has a steady gap of at least 1:200.
The discharge pipe from the pressure compensation
valve of Vaillant gas fired wall hung boiler can be con-
nected per T piece to the horizontal discharge pipe of
the domestic hot water cylinder.
4.7.5 High discharge point
The method illustrated in Fig. 4.6 is allowed, provided
no-one inside or outside the building is endangered by
the discharge point. The following points, for example,
should be taken into consideration for the decision on
whether a place is suitable as high discharge point:
– Possibility (considering the impact of wind), that
somebody is in the range of water that is flowing out
and if this is the case, whether the water is already
cooled down enough such that no danger is posed.
The thermal conductivity of the surface, the climatic
conditions and the location and alignment of the dis-
charge pipe may under certain circumstances have an
effect on the cooling down of the outflowing water
– The structure of the windows and other apertures.
– The likelihood that a baby carriage could be parked
beneath the drain.
– Resistance of the surface area against hot water.
– Possibility of ice formation if water is discharged on
the footpaths.
tundish
300 mm
minimum discharge pipe
metal hopper
head
Fig. 4.6 High discharge connection
4.7.6 Drain valve
The drain valve supplied with the geoTEHRM exclusive
has to be fitted in the cold water mains supply between
the geoTHERM exclusive and the cold water control
valves as low as possible.
10
2
8
9
45
3
6
Abb. 4.7 Control valve and drain valve
Legend
2 Expansion relief valve
3 Pressure limiting valve combined with strainer
4 Connection to expansion vessel
5 Balanced pressure cold water
6 Cold water mains inlet
8 Tundish
9 Cylinder drain point
10 Expansion vessel
We recommand to fit a hose pipe in the outlet of the
drain valve approximately 1 meter below the bottoom of
the geoTHERM exclusive (This can be acchieved by con-
necting suction hose to the outlet of the drain valve).
Assembly and installation 4

Installation instructions for geoTHERM exclusive VWS 0020051614_0020
4.8 Scope of delivery
1
5
4
3
2
8
7
6
9
10
11
13
12
14
15
16
17
Fig. 4.8 Checking the supplied material
For key, see Table 4.3.
The heat pump is delivered on a pallet, upright, in four
packing units.
• Check the heat pump and the separately packaged op-
erating console for any transport damage.
Pos. Amount Description
1 1 Heat pump
2 4 Lateral and upper cladding
3 1 Front cladding with frame
4 1 Operating console, pillar cover
52
2
12
3
3
2
Gaskets (yellow/green) for heating circuit elbow
unions
M6 flat-headed screws for fitting the operating
console to the frame (plus one spare screw)
M6 slotted pan head bolts for the assembly of the
lateral and the front cladding sections (plus two
spare bolts)
Sheet metal bolts for the assembly of the upper
cladding section (including 1 spare bolt)
Sheet metal bolts for the console terminal frame
(including 1 spare bolt)
Self-tapping screws for fastening the vrnetDIA-
LOG unit
6 4 VR 10 sensors
7 4 90° connection elbow with cap nuts
8 1 Control cable for vrnetDIALOG
9 1 Expansion relief valve for brine circuit, 1/2", 3 bar
10 1 Clamp for fastening the brine expansion tank
11 1 Bag of small parts for fastening the brine expan-
sion tank
14 2 Seals with metal support rings for heat source
circuit connection elbows
13 1 Insulation matting for heat source connection on
the rear wall
14 1 6 litre brine expansion tank, max. 3 bar
15 4 Installation instructions, operating manual,
quick-start guide,
quick installation instructions
16 1 VRC-DCF outside temperature sensor
17 2 GB guarantee card
Table 4.3 Scope of delivery
4 Assembly and installation