Vaillant geoTHERM exclusive Operating Manual
For the owner
Operating manual
geoTHERM exclusive
Heat pump with integrated domestic hot water cylinder
and additional cooling function
VWS
GB
Contents
Contents
General information ..................................................... 3
Data badge .............................................................................. 3
1 Notes on this manual ....................................... 3
1.2 Document storage .................................................... 3
1.3 Symbols used ............................................................. 4
1.4 Applicability of the manual ..................................... 4
2 Safety instructions .......................................... 4
2.1 Coolant ......................................................................... 4
2.2 Prohibition on alterations ....................................... 5
3 Information on installation and operation ..... 5
3.1 Intended use ............................................................... 5
3.2 Requirements of the installation site .................. 6
3.3 Cleaning and care .................................................... 6
3.4 Checking the operating condition of the heat
pump ............................................................................. 6
3.4.1 Filling pressure of the heating installation ......... 6
3.4.2 Filling level and filling pressure of the brine
circuit ........................................................................... 6
3.4.3 Accumulation of condensate (condensation
water) ........................................................................... 7
3.5 Energy saving tips .................................................... 7
3.5.1 General energy saving tips ..................................... 7
3.5.2 Economising by the correct use of the control
system .......................................................................... 7
3.6 Recycling and disposal ............................................ 8
3.6.1 Appliance ..................................................................... 8
3.6.2 Packaging .................................................................... 8
3.6.3 Coolant ......................................................................... 8
5.10 Troubleshooting and Diagnosis ............................. 25
5.10.1 Error messages on the Controller ........................ 25
5.10.2 Activating emergency mode .................................. 26
5.10.3 Errors/malfunctions that you can resolve ......... 26
5.10.4 Warnings ...................................................................... 26
5.10.5 Temporary malfunctions ......................................... 26
5.10.6 Fault-induced shutdown .......................................... 27
6 Warranty and customer service ..................... 28
6.1 Vaillant warranty....................................................... 28
6.2 Vaillant Service .......................................................... 28
7 Appendix ............................................................ 29
7.1 Technical data ............................................................ 29
7.2 Identification plate .................................................... 31
4 Equipment and functional description ........... 9
4.1 Principle of operation .............................................. 9
4.2 Mode of operation of the coolant circuit ............ 9
4.3 Automatic auxiliary functions ................................ 10
4.4 Design of the geoTHERM exclusive heatpump 11
5 Operation ........................................................... 13
5.1 Familiarising yourself with and operating the
controller ..................................................................... 13
5.1.1 Calling up the screens ............................................. 13
5.2 Setting menus and parameters ............................. 14
5.3 Controller description .............................................. 14
5.3.1 Possible system circuits .......................................... 14
5.3.2 Energy balance control ........................................... 15
5.3.3 Buffer cylinder charging principle ........................ 15
5.3.4 Resetting to factory settings ................................. 15
5.3.5 Control structure ...................................................... 15
5.3.6 Adjusting the energy saving functions ................ 15
5.4 Flow diagram .............................................................. 16
5.5 User level displays .................................................... 17
5.6 Special functions ....................................................... 23
5.7 Starting up the heat pump ..................................... 25
5.8 Shutting down the heat pump ............................... 25
5.9 Inspection .................................................................... 25
Operating Manual geoTHERM exclusive VWS 0020071929_002
General information
Notes on this manual 1
General information
The Vaillant geoTHERM exclusive heat pumps in this
manual are referred to in general as heat pumps and
are available in the following models:
Type name Article number
VWS 63/2 230V 0010007274
VWS 83/2 230V 0010007275
VWS 103/2 230V 0010007276
Table 0.1 Type designations and article numbers
The heat pumps state-of-the-art appliances
which have been constructed in accordance
with recognised safety regulations.
Conformity with the applicable standards has
been demonstrated.
'DACH' seal of approval
VDE seal and Tested Safety
1 Notes on this manual
The following information is intended to help you
throughout the entire documentation. Further documents apply in combination with this operating manual.
We accept no liability for any damage caused by failure to observe these instructions.
Other applicable documents
For the owner of the system:
Guarantee card No. 802922
For the heating engineer:
Installation instructions
geoTHERM exclusive No. 0020051614
Other applicable documents are all manuals that describe the operation of the heat pump, and the manuals
supplied with the accessories used.
1.2 Document storage
Store this operating manual and all related documents
in such a way that they are available whenever required.
You can store the documents inside the pillar cover.
If you move out or sell the appliance, pass on the documents to the buyer.
With the CE mark, we confirm as equipment manufacturers that the appliances in the geoTHERM exclusive
range satisfy the requirements of the Directive on Electromagnetic Compatibility (Council Directive 89/336/
EEC). The appliances meet the basic requirements of
the Low Voltage Directive (Council Directive 73/23/
EEC).
Furthermore, the appliances satisfy the requirements of
EN 14511 (Heat pumps with electrically-driven compressors, heating, specifications for appliances for space
heating and for warming drinking water) as well as EN
378 (safety and environmentally related specifications
for refrigerating systems and heat pumps).
Data badge
An identification plate is attached to the baseplate on
the inside of the geoTHERM exclusive heat pump. The
type designation is located at the top of the front cladding (see also Fig. 4.3, Item 1). In Chapter 7.2 of the Appendix there is a picture of an identification plate for
the benefit of technically-interested customers, and a
table explaining the symbols shown on it.
Fig. 1.1 Removing the pillar cover
3Operating Manual geoTHERM exclusive VWS 0020071929_00
1 Notes on this manual
2 Safety instructions
1.3 Symbols used
The following hazard classification symbols are used for
information, activities and energy saving tips in this operating manual.
Danger!
Immediate risk of serious injury or death
d
Danger!
Danger of burning and scalding!
H
Caution!
Potentially dangerous situation for the
a
product and environment.
Note!
Useful information and instructions.
h
This symbol points you to energy saving tips. You can
put this setting into effect by means of the heat pump
control system, among other things.
• Symbol for a necessary task
1.4 Applicability of the manual
This operating manual applies exclusively to units with
the following article numbers:
0010007274
0010007275
0010007276
The part number of your unit can be obtained from the
identification plate.
2 Safety instructions
Observe the following safety instructions and regulations when operating the heat pump:
• Take advantage of the extensive instruction in the operation of the heat pump provided by your specialist
technician.
• Carefully read through this operating manual.
• Only carry out activities that are described in this operating manual.
Danger!
Risk of burning as a result of contact
H
2.1 Coolant
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 neither a fire hazard nor an explosion risk.
a
with heat pump components!
High temperatures can appear on heat
pump components.
Do not touch any uninsulated pipes on
the heat pump.
Do not remove any of the cladding sections (apart from the pillar cover, see
Chap. 1.2).
Caution!
This appliance contains R 407 C coolant.
The coolant must not be allowed to escape 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.
d
h
Danger!
Risk of injury from freezing as a result
of contact with the R 407 C coolant!
Escaping coolant can cause freezing if
the exit point is touched:
Do not inhale gases or vapours emanating from leaks in the coolant circuit.
Avoid contact with the skin and eyes.
Note!
R 407 C presents no danger in normal
use and under normal conditions. With
improper use, however, it can cause injury and damage.
Operating Manual geoTHERM exclusive VWS 0020071929_004
Safety instructions 2
Information on the installation and operation 3
2.2 Prohibition on alterations
Danger!Inappropriate alterations can
cause injuries!
d
The prohibition applies to:
— geoTHERM exclusive heat pumps,
— the Vicinity of geoTHERM exclusive heat pumps,
— the Supply lines for water and power.
For alterations to the heat pump or its peripherals, you
must call on a qualified engineer.
• Do not damage or remove seals or locking devices on
components. Only suitably qualified heating engineer
or our customer service may remove sealed components.
Under no circumstances should you attempt to make changes or alterations to
the heat pump or other parts of the
heating and hot water system yourself.
3 Information on installation and
operation
Vaillant geoTHERM exclusive heat pumps are built using
state-of-the-art technology and according to standard
safety regulations and must be installed by a qualified
expert technician taking the applicable specifications,
regulations and guidelines into account.
Danger!
Risk to life as a consequence of using
d
3.1 Intended use
Vaillant heat pumps are built using state-of-the-art technology and according to standard safety rules and regulations. Nevertheless, there is still a risk of injury or
death to the user or others or of damage to the device
and other property in the event of im-proper 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 capacities 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 heaters for closed hot-water
central heating installations and for hot water generation. Any other use or extended use is considered to be
improper. The manufacturer or supplier is not liable for
any resulting damage. The user alone bears the risk.
It is also considered as intended use to observe:
— the operating and installation instructions
— all other applicable documents
— adherence to the inspection and care conditions.
unqualified personnel!
Installation, inspection and repair may
only be carried out by a qualified engineer. In particular, working on the electrical components and on the coolant
circuit requires an appropriate qualification.
5Operating Manual geoTHERM exclusive VWS 0020071929_00
3 Information on the installation and operation
Danger!
Risk to life as a consequence of improper
d
3.2 Requirements of the installation site
The installation site must be dimensioned such that the
heat pump can be properly installed and maintained.
• Ask your heating engineer which currently applicable
national building regulations must be observed.
The installation site must be dry and generally frostproof.
3.3 Cleaning and care
Do not use any scouring or cleaning agents that could
damage the cladding.
h
3.4 Checking the operating condition of the heat
In contrast to heaters that operate using fossil fuels, no
complex maintenance work is necessary for the Vaillant
geoTHERM exclusive heat pump.
h
3.4.1 Filling pressure of the heating installation
The filling pressure of the heating installation should be
checked at regular intervals. The filling pressure of the
heating installation can be checked from the reading on
the heat pump controller (see sect. 5.5). It should be between 1 and 2 bar. If the water pressure falls below 0.5
bar, the heat pump will be shut down automatically and
an error message will be displayed.
use of the installation.
There is a risk of death or serious injury
to the user or third parties or of damage
to the device and other property in the
event of improper use or use for which it
is not intended.
Note!
Clean the exterior of your heat pump
with a damp cloth and a little soap.
pump
Note!
Have your installation checked regularly
by an expert technician company to ensure efficient operation of your heat
pump.
Caution!
Risk of damage from water escaping
a
h
3.4.2 Filling level and filling pressure of the brine
Check the brine level or pressure in the brine circuit at
regular intervals. The filling pressure of the brine circuit
("Pressure Heat Source"“) can be checked from the
reading on the heat pump controller (see sect. 5.5). It
should be between 1 and 2 bar. If the brine pressure falls
below 0.2 bar, the heat pump will be shut down automatically and an error message will be displayed.
a
a
If the filling level of the brine has fallen so far that it is
no longer visible in the expansion tank, you must have
the brine refilled.
from leaks in the system.
Close the cold water stop valve in the
event of leaks in the hot water pipework.
In the event of leaks in the heating installation switch off the heat pump to
avoid any further leaking.
Have the leaks repaired by an expert
technician.
Note!
The cold water stop valve is not part of
the heat pump scope of supply. It is fitted on site by your heating engineer. He
will explain the location and handling of
the component to you.
circuit
Caution!
Risk of damage from brine escaping from
leaks in the system.
In the event of leaks in the brine circuit
switch off the heat pump to avoid any
further leaking.
Have the leaks repaired by an expert
technician.
Caution!
The brine circuit must be filled with the
correct quantity of fluid; otherwise the
system can be damaged.
Operating Manual geoTHERM exclusive VWS 0020071929_006
Information on the installation and operation 3
Fig. 3.1 Filling level of the brine expansion tank
It is normal for the filling level of the brine to fall a little
in the first month after the start-up of the system. The
filling level can also vary depending on the temperature
of the heat source. However it should never sink so far
that it is no longer visible in the expansion tank.
Caution!
Danger of damage
a
3.4.3 Accumulation of condensate (condensation
The evaporator, the brine pumps and the pipes in the
heat source circuit, as well as some components in the
coolant circuit, are insulated in the interior of the heat
pump, so that no condensate can accumulate. If a small
amount of condensate does form, it falls into the condensate pan. The condensate pan is located on the inside, in the lower part of the heat pump. As a result of
the heat generated inside the heat pump, the condensate in the condensate pan evaporates. Small amounts
of the accumulating condensate can be drained off
under the heat pump. In small amounts, accumulating
condensate should not be seen as a fault in the heat
pump.
The brine circuit of your heat pump system must only be filled by authorised
technical personnel.
Check the filling level of the brine circuit
at regular intervals and inform your expert technician company if the filling
level in the brine expansion tank is too
low.
water)
3.5 Energy saving tips
Below you will find important tips to help you operate
your heat pump system in an energy and cost-saving
manner.
3.5.1 General energy saving tips
You can even save energy by your general behaviour:
— Ventilate correctly:
Do not leave windows or French windows tilted open,
but rather open the windows wide 3 or 4 times a day
for 15 minutes and turn down the thermostatic valves
or room thermostats while ventilating.
— Do not block the radiators to ensure that heated air
can circulate in the room.
— Use a ventilation system with heat recovery.
The optimum exchange of air in the building is always
guaranteed by the use of a ventilation system with
heat recovery (windows no longer need to be opened
for ventilation purposes). If necessary, the air flow can
be matched to your individual requirements with the
ventilation unit's remote control.
— Check that windows and doors are airtight: Keep shut-
ters and blinds closed at night, so that as little heat as
possible is lost.
— If a VR 90 remote control unit is installed as an acces-
sory, do not obstruct it with furniture, etc., so that it
can measure the circulating room air unhindered.
— Think when using water, for example, take a shower
instead of a bath, promptly renew the seals on drip-
ping taps.
3.5.2 Economising by the correct use of the
control system
Further economies can be made by the correct use of
the control system on your heat pump.
The heat pump control system helps you to make savings by:
— Correct selection of the heating flow temperature:
Your heat pump controls the heating flow tempera-
ture depending on the room temperature you have
set. Therefore select a room temperature that is just
sufficient for your comfort, for example 20 °C. Every
degree over and above that means an increase in en-
ergy consumption of around 6 % per annum.
7Operating Manual geoTHERM exclusive VWS 0020071929_00
3 Information on the installation and operation
— For floor heating use heating curves of < 0.4. For radi-
ator heating, we recommend that they are laid out to
manage with a maximum flow temperature of 50 °C
at the lowest outside temperature; this corresponds to
heating curves of < 0.7.
— An appropriate setting of the hot water temperature:
Only heat hot water as much as is required for con-
sumption. Any further heating results in unnecessary
power consumption, and hot water temperatures of
more than 60 °C also lead to increased lime scale pro-
duction. We recommend that hot water generation be
achieved without the electric auxiliary heating; by this
method, the maximum hot water temperature is de-
termined by the high pressure cut-out in the heat
pump cooling circuit. This cut-out corresponds to a
maximum hot water temperature of approx. 58 °C.
— Setting of individually suited heating times.
— Select the correct operating mode:
For the times that you are asleep or away, we recom-
mend that you switch the heating to set-back mode.
— Heat uniformly:
By means of a meaningfully constructed heating pro-
gramme, you can arrange for all the rooms in your
house to be uniformly heated in accordance with your
pattern of use.
— Set the thermostatic valves:
You can adjust the room temperature to suit your in-
dividual requirements and ensure effective operation
of your heating installation using the thermostatic
valves in combination with a room temperature regu-
lator (weather compensator).
— The operating times of the circulation pump can thus
be optimally matched to the actual need.
— Consult a qualified engineer. He will adjust your heat-
ing installation to suit your personal requirements.
— These and more energy saving tips are provided in
Chap. 5.5. Descriptions of the controller settings and
their energy-saving potential are provided here.
Caution!
Environmental hazard due to improper
a
3.6.1 Appliance
at the end of their useful life.
As this heat pump is not covered by the law regarding
the marketing, return and environmentally friendly disposal of electrical and electronic equipment (ElektroG in
Germany), free disposal at a municipal collection point is
not provided.
3.6.2 Packaging
Leave the disposal of the transport packaging to the
qualified servicing company which installed the appliance.
3.6.3 Coolant
The Vaillant heat pump is filled with R 407 C coolant.
d
disposal!
The disposal of coolant must only be by
qualified specialists.
If your heat pump is identified with this symbol, it does not belong in your household
waste at the end of its useful life. In this case,
make sure that the Vaillant appliance and any
accessories present are properly disposed of
Danger!
Risk of injury from freezing as a result
of contact with the R 407 C coolant!
Escaping coolant can cause freezing if
the exit point is touched.
Do not inhale gases or vapours emanating from leaks in the coolant circuit.
Avoid contact with the skin and eyes.
The disposal of coolant must only be by
qualified specialists.
3.6 Recycling and disposal
Most of the raw materials used to manufacture your
heat pump and all its accessories and associated transport packaging can be recycled, and thus have no place
in your household waste.
Note!
Please observe the applicable national
h
legal regulations.
Make sure the old appliance and any accessories are disposed of properly.
h
Note!
R 407 C presents no danger in normal
use and under normal conditions. With
improper use, however, it can cause injury and damage.
Operating Manual geoTHERM exclusive VWS 0020071929_008
Equipment and functional description 4
4 Equipment and functional
description
4.1 Principle of operation
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 medium at a lower temperature.
The Vaillant geoTHERM exclusive heat pump uses geothermal energy as its heat source.
1/4 Electrical energy
3/4 Environmental energy 4/4 Heating energy
4.2 Mode of operation of the coolant circuit
Cold water
Heating
system
Auxiliary
Umschaltventil
Heizkreispumpe
3
Condenser
Expansion valve
Evaporator
4
Brine pump
Heat source
Fig. 4.2 Operating principle of the heat pump
heating
Diverter valve
2
Compressor
1
Mixer valve
Cooling heat exchanger
Coolant circuit
Heat source circuit
Hot water
Domestic hot water cylinder
Heating water circuit
Fig. 4.1 Using a geothermal heat source
The system consists of separate circuits which are coupled 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 generator for the domestic hot
water cylinder.
The coolant circuit is connected by means of the evaporator (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 condenses.
As thermal energy can only pass from a body at a higher temperature to a body at a lower temperature, the
coolant in the evaporator must have a lower temperature 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.
9Operating Manual geoTHERM exclusive VWS 0020071929_00
4 Equipment and functional description
These different temperatures are produced in the coolant circuit by means of a compressor (2) and an expansion valve (4), which are situated between the evaporator 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 significantly and in so doing loses much of its pressure and
temperature. This temperature is now lower than that
of the outside air 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 and fed
away underneath it. Drop formation under the unit is
thus possible.
geoTHERM exclusive heat pumps by Vaillant are
equipped with an auxiliary cooling function that ensures
a comfortably cool living environment in the summer
when outside temperatures are high. Vaillant heat
pumps with a cooling function utilise the principle of
"passive" cooling which means that the heat is removed
from the rooms and absorbed by the soil via an underfloor heating system, for example. The heating water
absorbs the heat from the rooms during this process
and transfers it via the special switching technology on
the inside of the heat pump to the colder brine which
then transfers the heat to the soil.
4.3 Automatic auxiliary functions
Frost protection
Your controller is equipped with a frost protection function. This function ensures that your heating installation
is protected from frost in all operating modes.
If the outside temperature falls below a value of +3 °C, a
minimum temperature of 5 °C is automatically programmed for each heating circuit.
Cylinder frost protection
This function starts automatically when the actual temperature of the cylinder falls below 10 °C. The cylinder is
then heated to 15 °C. This function is also active in the
"Off" and "Auto" operating modes, regardless of the
timer programmes.
Checking the external sensors
The sensors required are determined by the basic hydraulic circuit arrangement specified during commissioning. The heat pump constantly checks automatically
that all sensors are installed and functioning.
Protection from loss of heating water
A pressure sensor recognises a potential loss of water
and switches the heat pump off if the water pressure is
below 0.5 bar gauge pressure. The pressure sensor
switches the heat pump on again when the water pressure rises above 0.7 bar gauge pressure.
Pump seizing and valve seizing protection
To prevent the sticking of the heating, circulation and
brine pump or of the hot water diverter valve UV1, the
pumps and the valve, which have not been in operation
for 24 hours, are switched on every day for approx.
20 sec.
Protection against loss of brine
An analogue pressure sensor monitors possible low
brine pressure and switches the heat pump off if the
brine pressure is ever less than 0.2 bar on the pressure
gauge and error 91 is displayed on the error memory.
The heat pump switches on again when the brine pressure rises above 0.4 bar gauge pressure.
If the brine pressure drops below 0.6 bar on the pressure gauge for more than one minute a warning appears
in menu
Floor protection circuits in all hydraulic systems
without buffer cylinders (with hydraulic plan 6)
If the heating flow temperature in the underfloor heating circuit measured by sensor VF2 continuously exceeds a value of (max. HK temp. + compressor hysteresis + 2 K, default setting: 52 °C) for more than 15 minutes, the heat pump switches off with error message
F.72 (see Chap. When the heating flow temperature falls
below this value again and the error has been reset the
heat pump switches back on.
The maximum heating flow temperature can be changed
via vrDIALOG with the "Maximum heating circuit temperature" parameter.
a
1.
Caution!
Danger of damage to the floor.
Set the value for the floor protection circuit ensuring that it is not high enough
to damage the floor as a result of excessively high temperatures.
Operating Manual geoTHERM exclusive VWS 0020071929_0010
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