Vaillant geoTHERM VWS User manual

For the heating engineer
Installation instructions
geoTHERM
Heat pump VWS/VWW
GB

Contents
Installation instructions geoTHERM VWS/VWW 0020051574_012
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 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
2.3.1 Component groups - VWS....................................... 8
2.3.2 Component groups - VWW...................................... 9
2.4 General notes on operating modes and
functions...................................................................... 9
3 Safety instructions and regulations .............. 10
3.1 Safety instructions ................................................... 10
3.2 Regulations, rules, guidelines ............................... 11
3.3 Coolants....................................................................... 11
4 Assembly and installation............................... 12
4.1 Accessories................................................................. 12
4.2 Requirements of the installation site .................. 12
4.3 Dimensions and clearances.................................... 13
4.4 Assembly/Installation at a glance ........................ 14
4.5 Preparatory work in the installation area .......... 14
4.6 Requirements of the heating circuit.................... 15
4.7 Check the scope of delivery................................... 16
4.8 Transporting the heat pump.................................. 16
4.9 Installing the heat pump ......................................... 18
4.10 On-site installation.................................................... 18
4.10.1 Assembly of the heating system........................... 19
4.10.2 Assembly, brine circuit............................................ 19
4.10.3 Assembly of the well system (VWW only) .......... 20
4.11 Fitting the VRC DCF outside temperature
sensor........................................................................... 21
4.12 Installing the VR 80/VR 90 remote control
unit................................................................................ 21
4.13 Installing the VR 60 mixer module....................... 21
5 Filling the heating and heat source systems 21
5.1 Filling the heating circuit ........................................ 21
5.2 Filling the brine circuit (VWS only)....................... 22
5.3 Well system (VWW only) ......................................... 23
6 Electrical installation....................................... 24
6.1 Safety and installation information...................... 24
6.2 Regulations pertaining to electrical
installations ................................................................ 24
6.3 Electronic switchbox ................................................ 25
6.4 Connecting the power supply ................................ 25
6.4.1 Unblocked mains supply (electrical plan 1)......... 26
6.4.2 Dual circuit feed (electrical plan 2 and 3) .......... 28
6.5 Controller PCB at a glance..................................... 30
6.6 Wiring the controller PCB ....................................... 31
6.6.1 Connecting the VR 10 standard sensor............... 31
6.6.2 Direct heating operation (Hydraulic plan 1) ....... 32
6.6.3 Mixer circuit with buffer cylinder
(Hydraulic plan 2)...................................................... 33
6.6.4 Direct heating operation and domestic
hot water cylinder (Hydraulic plan 3).................. 34
6.6.5 Mixer circuit with buffer cylinder and
domestic hot water cylinder
(Hydraulic plan 4) ..................................................... 36
6.6.6 Mixer circuit with buffer cylinder, domestic
hot water cylinder and external passive
cooling (hydraulic plan 10)...................................... 37
6.7 Connecting the DCF receiver................................. 38
6.8 Connecting accessories........................................... 38
6.8.1 Installing the VR 80/VR 90 remote control
unit................................................................................ 39
6.8.2 Connecting further mixer circuits ........................ 39
6.8.3 Connecting vrnetDIALOG........................................ 40
6.9 Connecting an external boiler ............................... 41
6.10 Fitting the cladding and the operating panel .... 41
7 Start-up.............................................................. 43
7.1 General points regarding start-up........................ 43
7.2 Controller operation................................................. 44
7.2.1 Familiarising yourself with the controller........... 44
7.2.2 Calling up the screens ............................................. 44
7.3 Carrying out the initial commissioning ............... 45
7.4 Bleeding the brine circuit. ..................................... 46
7.5 Bleeding the heating circuit................................... 46
7.6 Handing the system over to the operator.......... 46
8 Controller........................................................... 47
8.1 Operating modes and functions............................ 47
8.2 Automatic auxiliary functions................................ 47
8.3 Settable auxiliary functions.................................... 48
8.3.1 Auxiliary functions in the Operator Level .......... 48
8.3.2 Auxiliary functions in the Code Level.................. 48
8.3.3 Auxiliary functions via vrDIALOG ......................... 49
8.4 Description of the controller.................................. 49
8.4.1 Possible system circuits.......................................... 49
8.4.2 Energy balance controller ...................................... 49
8.4.3 Buffer cylinder charging principle ........................ 50
8.4.4 Resetting to factory settings................................. 50
8.4.5 Controller structure ................................................. 50
8.5 Operator level sequence diagram ........................ 51
8.6 Code level sequence diagram................................ 52
8.7 Displays in the operator level................................ 54
8.8 Displays in the code layer....................................... 59
8.9 Installer Menu ............................................................ 67
8.10 Parameters that can be set with
vrDIALOG 810/2 ............................................................. 69
9 Inspection and maintenance ........................... 71
9.1 General notes............................................................. 71
9.2 Inspection work to be performed ......................... 71
9.3 Servicing and repairs ............................................... 71
9.4 Test operation and restarting................................ 72

3Installation instructions geoTHERM VWS/VWW 0020051574_01
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
Installation instructions, VPS buffer cylinder
No. 0020011995
Installation instructions, VPA multi-cylinder
No. 0020030713
Installation manual for vrnetDIALOG No. 839117
Installation manual for vrDIALOG No. 0020023003
Vaillant planning information, electric heat pump
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
10 Troubleshooting and diagnosis ....................... 72
10.1 Error messages on the controller......................... 72
10.2 Malfunctions of eBUS components ...................... 73
10.3 Displays in the error memory and under
"Warning message".................................................. 73
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
12.3 Vaillant Service.......................................................... 79
13 Technical data................................................... 80
13.1 Technical Data VWS ................................................. 80
13.2 Technical Data VWW................................................ 81
14 Start-up checklist............................................. 83
15 Reference........................................................... 85
Appendix ....................................................................... 88
Sensor characteristics.......................................................... 88
VRC-DCF outside temperature sensor............................. 89
Heat pump schematic - VWS.............................................. 90
Heat pump schematic - VWW............................................. 91
Circuit diagrams..................................................................... 92

Installation instructions geoTHERM VWS/VWW 0020051574_014
1.3 Applicability of the manual
These installation instructions apply exclusively to appli-
ances with the following part numbers:
Type name Article number
Brine/Water Heat Pumps
VWS 220/2 0010002797
VWS 300/2 0010002798
VWS 380/2 0010002799
VWS 460/2 0010002800
Water/Water Heat Pumps
VWW 220/2 0010002801
VWW 300/2 0010002802
VWW 380/2 0010002803
VWW 460/2 0010002804
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
With the CE mark, we confirm as equipment manufac-
turers that the appliances in the geoTHERM range satis-
fy the basic requirements of the following Directives:
- Electromagnetic Compatibility Directive (Council
Directive 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 Intended use
The Vaillant geoTHERM heat pumps are state-of-the-art
appliances which have been constructed in accordance
with recognised safety regulations. Nevertheless, 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 in-
tended.
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 (utility connection) of 0.1 ohms maximum.
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

5Installation instructions geoTHERM VWS/VWW 0020051574_01
2 Description of the appliance
2.1 Data badge
The geoTHERM heat pump has an identification plate
which is mounted on the front face of the magnetic
steel sheet. The type designation is located at the top of
the grey pillar frame.
R407 C
COP B0/W35 4,3
COP
B5/W55 3,3
B0/W35
B5/W55
3/N/PE 400V 50Hz
IP 20
Vaillant GmbH Remscheid / Germany
1/N/PE 230V 50Hz
3/N/PE 400V 50Hz
10 kW
10 kW
-- kW
99 A
< 44 A
4,1 kg
2,9 (29) MPa (bar)
21,6 kW
23,0 kW
VWS 220/2
Serial-No. 21054500100027970006000001N1
21054500100028300006000001N4
44 A
Fig. 2.1 Example of an identification plate
Explanation of the symbols on the identification plate
Rated voltage - compressor
Measuring voltage, controller +
heating circuit pump
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
44 A Start-up current with start-up cur-
rent limiter
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
.1027 CE mark
VDE/GS mark
VDE-EMC 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 geoTHERM VWS/VWW 0020051574_016
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 can be supplied from
different heat sources such as, e.g. geothermal heat
(geoTHERM VWS) or ground water (geoTHERM VWW).
3/4 Environmental energy 4/4 Heating energy
1/4 Electrical energy
Fig. 2.2 Using a geothermal heat source
Additional
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
EvaporatorCompressor
Expansion valve 2
1
3
4
Heating system
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

7Installation instructions geoTHERM VWS/VWW 0020051574_01
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 basin inside the unit (see
Fig. 2.7) and fed away underneath it. Drop formation
under the unit is thus possible.
2.3 Design of the heat pump
The Vaillant geoTHERM heat pump is available in the
versions listed below. The heat pump are, above all, dif-
ferent from each other in their output.
Type name Heating output (kW)
Brine/Water Heat Pumps (B0/W35)
VWS 220/2 21,6
VWS 300/2 29,9
VWS 380/2 38,3
VWS 460/2 45,9
Water-to-water heat pumps (W10/W35)
VWW 220/2 29,9
VWW 300/2 41,6
VWW 380/2 52,6
VWW 460/2 63,6
Table 2.2 Type summary
You can read the type designation of the heat pump
from the sticker (see Fig. 2.4, Item 1) on the pillar frame.
The heat pump is designed to implement all current
electrical supply tariffs.
2
3
1
4
Fig. 2.4 Front view VWS/VWW
Key to Fig. 2.4
1 Label with heat pump type designation
2 Operating panel
3 vrnetDIALOG mounting plate (behind the pillar cladding)
4 Serial number
Description of the appliance 2

Installation instructions geoTHERM VWS/VWW 0020051574_018
5
4
3
2
1
Fig. 2.5 Rear view VWS/VWW
Key to Fig. 2.5
1 Cable feedthrough for electrical connections
2 Heat source from the heat pump
3 Heat source to the heat pump
4 Heating return
5 Heating feed
2.3.1 Component groups - VWS
ABB A12-30-01ABB A12-30-01
L3L2L1
N
PE L3L2L1
N
PE L3L2L1
N
PE
L3L3L2 L1
NN
PE
L3L2L1 SS
N
PE L2 L1
L3
N
ABB A8-30-01
ABB A8-30-01
ABB A8-30-01
1
L L L L L 1 LN N N NN2N 2 1 2 1
LN
2345SCH678 ASB
N NAufZuLN121212121212
DCFOTAF
-
+
AufZu
ZH
NL
ZP
NL
SK2-P
NL
HK2-PH
K2VF2RF1VF1SPBUSDCF/AFEVU 1xZP
LP/UV1
ABB A12-30-01
5
4
6
7
9
8
1
3
2
Fig. 2.6 VWS - Front view, covers removed
Key to Fig. 2.6
1 Electronic switchbox (see Chap. 5.3)
2 Data badge
3 Compressor
4 Condensate pan
5 Fill/drain valve for brine circuit
6 Brine pump
7 Dryer cartridge
8 Evaporator
9 Condenser
hNote
As some components of geoTHERM heat
pumps (such as the heating circuit
pump, 3 way valves or electric auxiliary
heating) are not integrated into the unit,
they must be provided by the customer
and installed externally.
2 Description of the appliance

9Installation instructions geoTHERM VWS/VWW 0020051574_01
2.3.2 Component groups - VWW
ABBA12-30-01ABBA12-30-01
L3L2L1
N
PEL3L2L1
N
PEL3L2L1
N
PE
L3L3L2L1
NN
PE
L3L2L1SS
N
PEL2L1
L3
N
ABBA8-30-01
ABBA8-30-01
ABBA8-30-01
1
LLLLL1LN N N NN2 N 2 1 2 1
LN
2 3 45SCH678 ASB
N NAuf
ZuL N 121 2 1 21
21212
DCFOTAF
-+
Auf
Zu
ZH
NL
ZP
NL
SK2-P
NL
HK2-PHK2VF2RF1VF1 SPBUSDCF/AF EVU1xZPLP/UV1
ABBA12-30-01
5
6
4
7
9
8
1
3
2
Fig. 2.7 VWW - Front view, covers removed
Key to Fig. 2.7
1 Electronic switchbox (see Chap. 5.3)
2 Data badge
3 Compressor
4 Condensate pan
5 Fill/drain valve for heat source circuit
6 Flow monitor
7 Filter drying cartridge
8 Evaporator
9 Condenser
hNote
As some components of geoTHERM heat
pumps (such as the heating circuit
pump, 3 way valves or electric auxiliary
heating) are not integrated into the unit,
they must be provided by the customer
and installed externally.
2.4 General notes on operating modes and
functions
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 combined 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
Description of the appliance 2

Installation instructions geoTHERM VWS/VWW 0020051574_0110
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 presetta-
ble period
- Cooling mode
The cooling mode allows you to use the heat pump for
cooling.
A number of components for the passive cooling oper-
ation must be installed on the customer side. For in-
formation and selection of components, refer to the
planning information for the electric heat pump sup-
plied by Vaillant.
- Screed floor drying
For drying out screed floors
- Fixed value controlling
For setting a fixed flow temperature
- Anti-Legionella function
Kills germs in the cylinder and in the pipes
- Fast test
Testing function for maintenance
- Remote maintenance
Diagnostics and setting via vrDIALOG or vrnetDIALOG
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.
If the heating water hardness is above 3,0 mmol/l
(21,05 °e) it should be softened. You can use the
Vaillant ion exchanger (Art. No. 990 349) for this. Ob-
serve the enclosed instructions for use.
aCaution! For VWW only:
Risk of damage to the heat pump.
The incoming ground water must be
checked for quality to ensure that no
damage occurs to the suction well, pipes
or evaporator.
2 Description of the appliance
3 Safety instructions and regulations

11Installation instructions geoTHERM VWS/VWW 0020051574_01
3.2 Regulations, rules, guidelines
Pay particular attention to the local specifications, pro-
visions, regulations and guidelines on the following
when setting up, installing and operating the heat pump:
- electrical connection
- supply system operator
- water distribution company
- geothermal energy utilisation
- integration of heat sources and heating installations
- energy conservation
- hygiene
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 unit contains R 407 C coolant. The
coolant must not be allowed to escape
into the atmosphere. R 407 C is a fluori-
nated, chlorine-free greenhouse gas that
has been included in 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
Vaillant is used.
Safety instructions and regulations 3

Installation instructions geoTHERM VWS/VWW 0020051574_0112
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. 6.9.
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 80 and 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).
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 VPS buffer cylinder is used as an intermediate cyl-
inder for heating water and can be installed between
the heat pump and the heating circuit. It provides the
necessary to bridge over the power company blocking
periods.
VPA combination cylinder
The Vaillant VPA combination cylinder can be fed from
various energy sources and is used for heating both
heating water and DHW.
Other accessories
- Heat transfer fluid
- Filling pump
- Safety assembly and tundish
- Expansion vessel for the heating circuit
4.2 Requirements of the installation site
- Choose a dry room that is generally frost-proof.
- You should not install the unit near heat sources or
combustible materials.
- The floor must be level and sufficiently stable to be
able to bear the weight of the heat pump, together
with the DHW cylinder and possibly buffer tank.
- It must be possible to install suitable pipe conduits
(for heat source, DHW and heating).
- A connection for the condensate drain must be pro-
vided.
- When choosing the installation site, bear in mind that
when operating, the heat pump can transmit vibra-
tions to the floor or nearby walls.
- To achieve the best possible sound attenuation, we
recommend that pipe lead-throughs in walls and ceil-
ings are insulated against structure-borne noise.
- 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 installa- tion space [m3]
VWS 220/2
VWW 220/2 4.1 4.3 13,2 13.9
VWS 300/2
VWW 300/2 5,99 19,3
VWS 380/2
VWW 380/2 6,7 21,6
VWS 460/2
VWW 460/2 8,6 27,7
Table 4.1 Minimum installation space
4 Assembly and installation

13Installation instructions geoTHERM VWS/VWW 0020051574_01
4.3 Dimensions and clearances
304110 110
141
1099
760
1200
760
1100
915
Fig. 4.1 Dimensions and clearances
Assembly and installation 4

Installation instructions geoTHERM VWS/VWW 0020051574_0114
500 mm
250 mm
600 mm
600 mm
600 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.
- Transport the heat pump to the installation area.
- Position and align the heat pump in the intended as-
sembly location.
- 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").
• Drill at least two core holes, taking the dimensions of
the unit and connections into account (see Fig. 4.3,
Pos. 1).
• Each pipe from the heat source requires its own bore
hole.
• Special pipe feedthroughs must be used if there is a
risk of ground water penetration (follow the manufac-
turer'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.
A connection for the condensate drain must be provid-
ed.
• 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).
4 Assembly and installation

15Installation instructions geoTHERM VWS/VWW 0020051574_01
160
470
Fig. 4.4 Ideal installation dimensions of flexible hoses
• The installation site and pipe installation planning
for the geoTHERM heat pump should ensure that the
flexible connection hoses supplied for the purposes of
vibration isolation can be connected as shown in
Fig. 4.4.
4.6 Requirements of the heating circuit
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. This is guaranteed by professionally
installed buffer cylinder.
Assembly and installation 4

Installation instructions geoTHERM VWS/VWW 0020051574_0116
4.7 Check the scope of delivery
ABB A12-30-01ABBA12-30-01
L3L2L1
N
PEL3L2L1
N
PEL3L2L1
N
PE
L3L3L2L1
NN
PE
L3L2L
1SS
N
PEL2L1
L3
N
ABB A8-30-01
ABB A8-30-01
ABBA8-30-01
1
LLL L L 1 LN N NNN2N2 1 21
LN
2 3 4 5 SCH678ASB
NNAuf
ZuLN
12 121212 121 2
DCFOTAF
-
+
Auf
Zu
ZH
NL
ZP
NL
SK2-P
NL
HK2-PHK2VF2RF1VF1SPBUSDCF/AFEVU1xZP
LP/UV1
ABBA12-30-01
3
2
1
6
5
4
7
8
9
10
11
12
Fig. 4.5 Checking the supplied material
For key, see Table 4.2.
The heat pump is supplied in four packing units.
hNote
Before installing the heat pump, the in-
staller must perform a visual inspection
for possible transport damage.
• Check the heat pump and the separately packaged op-
erating console for any transport damage.
Pos. Amount Description
1 1 Heat pump
2 2 Side cladding panels
3 1 Operating console, pillar cover
4 1 6 litre brine expansion tank, max. 3 bar, fixing
material
5 1 VRC-DCF outside temperature sensor
6 4 VR 10 sensors
7 1 Control cable for vrnetDIALOG
8 4 Flexible connecting hoses (600 mm long, with
1 1/2" internal thread fitted on heating/heat
source side)
9 1 Expansion relief valve for brine circuit, 1/2",
3 bar
10 4 Installation instructions, operating manual
11 8
2
4
2
2
Seals for heating circuit connecting hoses (grey)
and heat source circuit (yellow/green)
M6 flat-headed screws for fitting the operating
console to the frame (plus one spare screw)
Flat-headed screws for fixing side cladding to
frame
Self-tapping screws for the operating console
frame (incl. one spare screw)
Self-tapping screws for fastening the vrnetDIA-
LOG unit
12 4 Front and rear cladding panels
Table 4.2 Scope of delivery
The frame for the operating console is already fastened
to the heat pump casing on delivery.
4.8 Transporting the heat pump
• Carefully remove the packaging and padding, taking
care not to damage any parts of the unit.
dDanger!
Risk of injury!
The heat pump is too heavy to be lifted
by persons during transportation. You
should therefore only use one of the
specified transportation methods.
aCaution!
Risk of damage!
Regardless of the mode of transport, the
heat pump must never be tilted by more
than 45°. Otherwise it can cause mal-
functions in the coolant circuit during
later operation, which in the worst case
can lead to a failure of the whole sys-
tem.
The heat pump may only be transported using the fol-
lowing methods (see Fig. 4.6):
- Forklift truck
- Lifting trolley
4 Assembly and installation

17Installation instructions geoTHERM VWS/VWW 0020051574_01
ABBA12-30-01ABBA12-30-01
L3L2L1
N
PEL3L2L1
N
PEL3L2L1
N
PE
L3L3L2L1
NN
PE
L3L2L1SS
N
PEL2L1
L3
N
ABBA8-30-01
ABBA8-30-01
ABBA8-30-01
1
LLLLL1L
NNNNN2N2121
LN
2345SCH 678ASB
NN
Auf
Zu
LN121212121212
DCFO
TAF
-
+
Auf
Zu
ZH
N
L
ZP
N
L
SK2-P
N
L
HK2-PHK2VF2RF1VF1SPBUSDCF/AFEVU1xZP
LP/UV1
ABBA12-30-01
Fig. 4.6 Authorised and unauthorised means of transportation
Assembly and installation 4

Installation instructions geoTHERM VWS/VWW 0020051574_0118
4.9 Installing the heat pump
ABB
0-10 mm
Fig. 4.7 Adjusting the feet
• Pay attention to the minimum wall clearances when
installing the heat pump (see Fig. 4.2).
• Align the heat pump horizontally by adjusting the feet.
4.10 On-site installation
aCaution!
Flush the heating system thoroughly be-
fore connecting the appliance!
By doing that, residue such as welds,
cinder, hemp, putty, rust, rough dust and
similar substances are removed from the
pipes. Otherwise such substances can be
deposited in the appliance and cause
damage.
aCaution!
To prevent leaks, take care that no me-
chanical stresses are created on the
connection lines!
- The pipework installation must be carried out in ac-
cordance with the dimensional and connection draw-
ings in Fig. 4.1.
- The installation must be performed by a specialist fit-
ter.
- The applicable regulations must be observed during
the installation.
hNote
Air in the heating installation leads to
impaired operation and reduces the heat-
ing output. Fit bleed valves as required.
3
4
2
1
Fig. 4.8 Fitting the supply lines
Key to Fig. 4.8
1 Heating feed
2 Heating return
3 Heat source to the heat pump
4 Heat source from the heat pump
r
Fig. 4.9 Handling of flexible connection pipes
aCaution!
Danger of water escaping!
The flexible connecting hoses supplied
must not be twisted, buckled or
stretched. Observe the minimum radius
for elbows of 300 mm.
hNote
The supplied connecting hoses are in-
tended to isolate vibrations and must be
installed at the heat pump as otherwise
vibrations may occur in the hydraulic
system. Observe the clearance from the
wall (Fig. 4.1) and Fig. 4.4.
4 Assembly and installation

19Installation instructions geoTHERM VWS/VWW 0020051574_01
4.10.1 Assembly of the heating system
aCaution!
Risk of damage!
In order to be able to clear any possible
overpressure, the heat pump must be
connected to an expansion vessel and an
expansion relief valve, at least DN 20
with a maximum opening pressure of
3 bar (not supplied).
HDanger!
Risk of scalding!
The blow-off line on the expansion relief
valve must be the size of the valve's
outlet aperture and be installed in a
frost-free environment. It must remain
constantly open. It must be fitted in
such a way that persons are not endan-
gered by hot water or steam when it
blows off.
We recommend the installation of a
Vaillant safety assembly and tundish.
• Fit the heating flow and return lines with all compo-
nents.
• Insulate all the pipes.
4.10.2 Assembly, brine circuit
• Install the heat source pipes and all their associated
components.
49
61
49
61
58
57
65
42a
5858
Collector 33
Fig. 4.10 VWS heat source circuit
42a
57 65
1
Fig. 4.11 Fitting the brine expansion tank
Key to Fig. 4.11
1 Line, heat source/heat pump
42a Expansion relief valve
57 Brine expansion tank
65 Brine collecting tank
Assembly and installation 4

Installation instructions geoTHERM VWS/VWW 0020051574_0120
hNote
The brine expansion tank has a capacity
of approx. 6 litres and is therefore ade-
quate for brine circuits up to a maximum
of 1900 litres.
If a flat collector is used the capacity of
the brine expansion tank supplied will
not be sufficient. If the annual tempera-
ture fluctuation in the soil is greater
than 8 K, the brine will expand by more
than 6 litres which means that in this
case the customer will need to select a
larger brine expansion tank. A larger ex-
pansion tank will also be required if the
overall quantity of brine in the system
exceeds 1900 litres.
aCaution!
The screw couplings on the brine expan-
sion tank must be sealed with hemp.
Sealing with, e.g., teflon tape can lead to
leaks in the brine circuit.
42a
Fig. 4.12 Installing the expansion relief valve
Ø 150 mm
Ø 10 mm
Rp 1/2
57
Fig. 4.13 Mounting the brine expansion tank on the wall
• Fit the bracket for the brine expansion tank to the
wall using the wall plug and the screw.
• Unfasten the pre-assembled connection pieces from
the brine expansion tank (57).
• Wind hemp into the outer threads of the connection
pieces.
• Fit the first connection piece to the 3bar expansion
relief valve (42a) enclosed with the heat pump.
• Using the second connection piece, fit the brine ex-
pansion tank (57) from the accessory kit to the pipe
(1) running from the heat source to the heat pump.
• Fix the brine expansion tank with the bracket.
• Fit the connection piece with the expansion relief
valve to the brine expansion tank.
• Fit the brine collecting tank (65) to the expansion re-
lief valve (42a) at zero pressure.
The brine collecting tank must not be completely
closed, as otherwise the functioning of the expansion
relief valve is not guaranteed.
• Provide all the pipes with vapour-proof thermal insula-
tion. The accessory kit contains the insulating mat
provided for the thermal insulation of the connection
plate.
4.10.3 Assembly of the well system (VWW only)
With water as the heat source, the well system is in
most cases implemented with a suction and injection
well. The customer-side well pump (immersion pump)
should be fitted in the suction well. In so doing, follow
the installation and assembly instructions for the im-
mersion pump. See Chap. 6.4. for the electrical connec-
tions of the immersion pump
4 Assembly and installation