Vaillant flexoTHERM exclusive VWF 57/4 230V User manual

en Installation and maintenance instructions
flexoTHERM exclusive
VWF 57 - 117/4 230V
0020213395_04 - 26.01.2023

2Installation and maintenance instructions 0020213395_04
Installation and maintenance
instructions
Contents
1 Safety .................................................................... 4
1.1 Intended use .......................................................... 4
1.2 General safety information .................................... 4
1.3 Regulations (directives, laws, standards) .............. 6
2 Notes on the documentation .............................. 7
2.1 Observing other applicable documents ................. 7
2.2 Storing documents................................................. 7
2.3 Validity of the instructions...................................... 7
3 System overview.................................................. 7
3.1 Heat pump system design ..................................... 7
3.2 Functionality........................................................... 7
3.3 Safety devices ....................................................... 9
4 Product description........................................... 10
4.1 Product design..................................................... 10
4.2 Information on the data plate............................... 10
4.3 Explanation of product stickers............................ 11
4.4 Type designation and serial number ................... 11
4.5 CE marking .......................................................... 11
4.6 Benchmark........................................................... 11
5 Set-up.................................................................. 11
5.1 Checking the scope of delivery............................ 11
5.2 Selecting the installation site ............................... 12
5.3 Dimensions .......................................................... 13
5.4 Minimum clearances............................................ 14
5.5 Transporting the heat pump ................................ 14
5.6 Installing the product............................................ 15
5.7 Removing the carrying straps.............................. 15
5.8 Removing the front casing................................... 15
5.9 Removing the casing top and side casings ......... 16
5.10 Removing the refrigerant circuit cover, if
required................................................................ 16
6 Carrying out the hydraulics installation.......... 17
6.1 Requirements for the heating circuit.................... 17
6.2 Connecting the heat pump to the heating
circuit ................................................................... 17
6.3 Connecting the heat pump to the brine circuit ..... 17
6.4 Hydraulic wiring in the system ............................. 18
7 Filling and purging the installation.................. 18
7.1 Filling and purging the heating circuit .................. 18
7.2 Filling and purging the brine circuit...................... 19
8 Electrical installation......................................... 21
8.1 Routing eBUS lines.............................................. 21
8.2 Opening the electronics box ............................... 21
8.3 Electronics box .................................................... 22
8.4 Establishing the power supply ............................. 22
8.5 Power supply PCB............................................... 24
8.6 Control PCB......................................................... 25
8.7 Connection terminals........................................... 26
8.8 Connecting the system control and
accessories to the electronics system ................. 26
8.9 Carrying out the wiring......................................... 26
8.10 Installing the VRC DCF........................................ 26
8.11 Installing optional accessories............................. 26
8.12 Connecting the circulation pump ......................... 26
8.13 Connecting the heat pump system to the
photovoltaic installation........................................ 26
8.14 Checking the electrical installation ...................... 27
8.15 Completing installation......................................... 27
9 Start-up ............................................................... 27
9.1 Operating concept ............................................... 27
9.2 Starting up the heat pump system....................... 27
9.3 Running the installation assistants ...................... 28
9.4 Calling up the installer level................................. 28
9.5 Changing the set language.................................. 28
9.6 Heating mode flow temperature control............... 29
9.7 Activating cooling mode....................................... 29
9.8 Calling up statistics.............................................. 29
9.9 Checking that the product works correctly........... 29
10 Adapting the unit to the heating
installation.......................................................... 29
10.1 Setting parameters .............................................. 29
10.2 Setting the high-efficiency pumps........................ 29
10.3 Setting the flow temperature in heating mode
(with no control connected) ................................. 31
10.4 Setting the flow temperature in cooling mode
(with no control connected) ................................. 31
10.5 Handing the product over to the end user ........... 31
11 Troubleshooting ................................................ 31
11.1 Displaying the Live Monitor (current product
status) .................................................................. 31
11.2 Checking fault codes ........................................... 32
11.3 Querying the fault memory .................................. 32
11.4 Resetting the fault memory.................................. 32
11.5 Restarting the installation assistant ..................... 32
11.6 Using check programmes.................................... 32
11.7 Carrying out the actuator test .............................. 32
11.8 Electric back-up heater circuit breaker ................ 32
12 Inspection and maintenance ............................ 32
12.1 Inspection and maintenance information............. 32
12.2 Procuring spare parts .......................................... 32
12.3 Checking maintenance messages....................... 33
12.4 Inspection and maintenance check-list................ 33
12.5 Checking and correcting the filling pressure of
the heating installation......................................... 33
12.6 Checking and correcting the brine circuit's
filling pressure...................................................... 33
12.7 Carrying out a restart and test operation ............. 33
13 Decommissioning.............................................. 34
13.1 Temporarily decommissioning the product.......... 34
13.2 Decommissioning the product ............................. 34
14 Recycling and disposal..................................... 34
14.1 Disposing of the brine fluid .................................. 34
14.2 Arranging disposal of refrigerant ......................... 34
15 Customer service............................................... 34
Appendix ............................................................................ 35
A Heat pump schematic........................................ 35

0020213395_04 Installation and maintenance instructions 3
B Circuit diagram .................................................. 37
C Power supply 1~/N/PE 230 V (wiring
diagram 1 = ).................................................. 38
D Power supply 3~/PE 230 V (wiring diagram
2 = ) ................................................................. 38
E Installer level overview...................................... 39
F Status codes –Overview .................................. 43
G Maintenance messages .................................... 45
H Fault codes......................................................... 45
I Characteristic values, external cylinder
temperature sensor ........................................... 51
J Characteristic values, internal temperature
sensors (refrigerant circuit).............................. 51
K Characteristic values for the VRC DCF
outdoor temperature sensor............................. 52
L Commissioning Checklist................................. 53
M Commissioning Checklist................................. 56
N Check conditions for determining the
performance data in accordance with EN
14511................................................................... 61
N.1 Building circuit (heat distribution side in
heating mode)...................................................... 61
O Technical data.................................................... 61
O.1 General ................................................................ 61
O.2 Brine heat source................................................. 63
O.3 Ground water heat source ................................... 65
P Rated currents = In[A]....................................... 67
Index ................................................................................... 69

4Installation and maintenance instructions 0020213395_04
1 Safety
1.1 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The heat pump system is intended exclus-
ively for domestic use.
The heat pump system is intended as a heat
generator with cooling function for closed
heating installations and for domestic hot wa-
ter generation. Operating the pump outside
the application limits results in the heat pump
being switched off by the internal control and
safety devices.
Cooling mode with radiator heating systems
is not permitted since radiators do not have
an adequate heat transfer surface area.
Intended use includes the following:
–observance of accompanying operating,
installation and maintenance instructions
for the product and any other system com-
ponents
–installing and setting up the product in ac-
cordance with the product and system ap-
proval
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
Intended use also covers installation in ac-
cordance with the IP code.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document, shall be considered improper
use. Any direct commercial or industrial use
is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.2 General safety information
1.2.1 Risk caused by inadequate
qualifications
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
1.2.2 Risk of injury due to the heavy weight
of the product
The product weighs over 50 kg.
▶Make sure that the product is carried by at
least two people.
▶Use suitable transport and lifting equip-
ment, in accordance with your job safety
analysis.
▶Use suitable personal protective equip-
ment: Gloves, safety footwear, protective
goggles, protective helmet.
1.2.3 Risk of death due to lack of safety
devices
The basic diagrams included in this docu-
ment do not show all safety devices required
for correct installation.
▶Install the necessary safety devices in the
installation.
▶Observe the applicable national and inter-
national laws, standards and directives.
1.2.4 Risk of death from electric shock
There is a risk of death from electric shock if
you touch live components.
Before commencing work on the product:
▶Disconnect the product from the power
supply by switching off all power supplies
at all poles (electrical partition in over-
voltage category III for full partition, e.g.
fuse or circuit breaker).
▶Secure against being switched back on
again.

0020213395_04 Installation and maintenance instructions 5
▶Wait for at least 3 minutes until the capa-
citors have discharged.
▶Check that there is no voltage.
1.2.5 Risk of burns due to hot and cold
components
There is a risk of burns from any uninsu-
lated pipelines and from the electric back-
up heater.
▶Only carry out work on the components
once they have reached environmental
temperature.
1.2.6 Risk of material damage due to an
unsuitable installation surface
An uneven installation surface may cause
leaks in the product.
If the installation surface does not have suffi-
cient load-bearing capacity, the product may
topple.
▶Make sure that the product is positioned
flush against the installation surface.
▶Ensure that the installation surface has
sufficient load-bearing capacity to bear the
operating weight of the product.
1.2.7 Risk of material damage due to
malfunctioning
Not rectifying faults, changing the safety
devices and failing to carry out maintenance
can cause malfunctioning and pose safety
risks during operation.
▶Ensure that the heating installation is in a
technically perfect condition.
▶Ensure that no safety or monitoring
devices have been removed, bridged or
disabled.
▶Immediately eliminate any faults and dam-
age that may affect safety.
1.2.8 Risk of injury from freezing caused
by touching refrigerant
The product is delivered with an operational
filling of R410A refrigerant. Escaping refri-
gerant may cause freezing if the exit point is
touched.
▶If refrigerant escapes, do not touch any
components of the product.
▶Do not inhale any vapours or gases that
escape from the refrigerant circuit as a
result of leaks.
▶Avoid skin or eye contact with the refriger-
ant.
▶In the event of skin or eye contact with the
refrigerant, seek medical advice.
1.2.9 Risk of material damage caused by
using an unsuitable tool
▶Use the correct tool.
1.2.10 Risk of material damage caused by
condensate inside the house
In heating mode, the lines between the heat
pump and the heat source (environment cir-
cuit) are cold, which means that condensate
may form on the lines in the house. In cooling
mode, the lines in the building circuit are so
cold that condensate may form if the temper-
ature falls below the dew point. Condensate
may lead to material damage, for example
due to corrosion.
▶Ensure that you do not damage the heat
insulation on the lines.
1.2.11 Risk of material damage caused by
frost
▶Do not install the product in rooms prone
to frost.
1.2.12 Risk of environmental damage
caused by refrigerant
The product contains a refrigerant with con-
siderable GWP (GWP = Global Warming Po-
tential).
▶Ensure that the refrigerant does not es-
cape into the atmosphere.
▶If you are a competent person who is qual-
ified to work with refrigerants, you must
wear appropriate protective equipment
when servicing the product, and access
the refrigerant circuit, if required. Recycle
or dispose of the product in accordance
with the applicable regulations.