Vaillant flexoTHERM VWF 5x User manual

For the operator
Operating instructions
flexoTHERM
VWF 5x - 19x/4
GB, IE
Operating instructions
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone]‑0 Fax [phone]‑28 10
[email protected] www.vaillant.de

Contents
2Operating instructions flexoTHERM 0020213396_00
Contents
1 Safety ............................................ 3
1.1 Action-related warnings ................. 3
1.2 General safety information............. 3
2 Notes on the documentation ...... 7
2.1 Observing other applicable
documents ..................................... 7
2.2 Storing documents......................... 7
2.3 Applicability of the instructions....... 7
3 System overview.......................... 7
3.1 Heat pump system design ............. 7
4 Product description..................... 8
4.1 CE label ......................................... 8
4.2 Safety devices ............................... 8
4.3 Serial number ................................ 9
4.4 Product design............................... 9
4.5 Opening the front flap .................... 9
4.6 Operator control panel ................. 10
4.7 Basic display................................ 10
4.8 Operating concept ....................... 11
4.9 Menu display................................ 11
4.10 Operating levels........................... 12
5 Operating.................................... 12
5.1 Starting up the product ................ 12
5.2 Adjusting the target cylinder
temperature ................................. 12
5.3 Yield indicator .............................. 12
5.4 Displaying the Live Monitor.......... 12
5.5 Displaying the building circuit
pressure....................................... 12
5.6 Displaying the environment
circuit pressure ............................ 12
5.7 Reading the operating
statistics ....................................... 12
5.8 Setting the language.................... 13
6 Maintenance and care ............... 13
6.1 Checking and maintaining ........... 13
7 Troubleshooting ........................ 13
7.1 Fault message ............................. 13
8 Decommissioning...................... 14
8.1 Switching off the heat pump ........ 14
8.2 Permanently decommissioning
the product................................... 14
8.3 Recycling and disposal ................ 14
9 Guarantee and customer
service ........................................ 14
9.1 Guarantee.................................... 14
9.2 Customer service......................... 15
Appendix ............................................... 16
A Overview of the operator's
operating level ........................... 16

Safety 1
0020213396_00 flexoTHERM Operating instructions 3
1 Safety
1.1 Action-related warnings
Classification of action-re-
lated warnings
The action-related warnings
are classified in accordance
with the severity of the pos-
sible danger using the following
warning signs and signal words:
Warning symbols and signal
words
Danger!
Imminent danger to life
or risk of severe personal
injury
Danger!
Risk of death from electric
shock
Warning.
Risk of minor personal
injury
Caution.
Risk of material or envir-
onmental damage
1.2 General safety
information
1.2.1 Intended use
There is a risk of injury or death
to the user or others, or of dam-
age to the product and other
property in the event of im-
proper use or use for which it
is not intended.
The system is intended exclus-
ively for domestic use.
The system is intended as a
heat generator with cooling
function for closed central heat-
ing installations and for hot wa-
ter generation. Operation of
the pump outside the applic-
ation limits results in the heat
pump being switched off by
the internal control and safety
devices.
Cooling mode with radiator
heating systems is not permit-
ted since radiators do not have
an adequate heat transfer sur-
face area.
Intended use includes the fol-
lowing:
–observance of the operating
instructions included for the
product and any other system
components
–compliance with all inspection
and maintenance conditions
listed in the instructions.
This product can be used by
children aged from 8 years
and above and persons with
reduced physical, sensory or
mental capabilities or lack of
experience and knowledge if
they have been given supervi-
sion or instruction concerning
use of the product in a safe way
and understand the hazards in-

1 Safety
4Operating instructions flexoTHERM 0020213396_00
volved. Children shall not play
with the product. Cleaning and
user maintenance shall not be
made by children without super-
vision. Children must not play
with the product. Cleaning and
user maintenance work must
not be carried out by children
unless they are supervised.
Any other use that is not spe-
cified in these instructions, or
use beyond that specified in this
document shall be considered
improper use. Any direct com-
mercial or industrial use is also
deemed to be improper.
Caution.
Improper use of any kind is
prohibited.
1.2.2 Danger caused by
improper operation
Improper operation may present
a danger to you and others, and
cause material damage.
▶Carefully read the enclosed
instructions and all other ap-
plicable documents, particu-
larly the "Safety" section and
the warnings.
1.2.3 Risk of death due to
explosive and flammable
materials
▶Do not use or store explosive
or flammable materials (e.g.
petrol, paper, paint) in the in-
stallation room of the product.
1.2.4 Risk of death due
to changes to the
product or the product
environment
▶Never remove, bridge or
block the safety devices.
▶Do not tamper with any of the
safety devices.
▶Do not damage or remove
any seals on components.
Only authorised competent
persons or customer services
may modify sealed compon-
ents.
▶Do not make any changes to:
–The product itself
–The product environment
–The brine fluid, air and elec-
tricity supply lines
–The drain line and expan-
sion relief valve for the heat
source circuit
–The constructional condi-
tions that may affect the
operational reliability of the
product
1.2.5 Risk of injury due to
chemical burns caused
by brine fluid
The brine fluid ethylene glycol is
harmful to health.
▶Avoid contact with the skin
and eyes.

Safety 1
0020213396_00 flexoTHERM Operating instructions 5
▶Always wear gloves and pro-
tective goggles.
▶Do not inhale or swallow.
▶Observe the safety data sheet
that accompanies the brine
fluid.
1.2.6 Preventing the risk of
injury from freezing
as a result of touching
coolant
The product is supplied with an
operational filling of R 410 A
refrigerant. Escaping coolant
may cause freezing if the exit
point is touched.
▶If coolant 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 coolant.
▶In the event of skin or eye
contact with the coolant, seek
medical advice.
1.2.7 Risk of injury and
material damage due to
maintenance and repairs
carried out incorrectly or
not carried out at all
▶Never attempt to carry out
maintenance work or repairs
on your product yourself.
▶Faults and damage should
be immediately rectified by a
competent person.
▶Adhere to the maintenance
intervals specified.
1.2.8 Risk of material damage
caused by frost
▶Ensure that the heating in-
stallation always remains in
operation during freezing con-
ditions and that all rooms are
sufficiently heated.
▶If you cannot ensure the op-
eration, have a competent
person drain the heating in-
stallation.
1.2.9 Avoid environmental
damage caused by
escaping coolant
The product contains R 410 A
refrigerant. The coolant must
not be allowed to escape into
the atmosphere. R410A is a
fluorinated greenhouse gas
covered by the Kyoto Protocol,
with a GWP of 2088 (GWP =
global warming potential). If
this gas escapes into the atmo-
sphere, its impact is 2088 times
greater than the natural green-
house gas CO2.
Before the product is disposed
of, the coolant that is contained
in it must be completely drained
into a suitable vessel so that

1 Safety
6Operating instructions flexoTHERM 0020213396_00
it can then be recycled or dis-
posed of in accordance with
regulations.
▶Ensure that only officially cer-
tified competent persons with
appropriate protective equip-
ment carry out maintenance
work on the refrigerant circuit
or access it.
▶Arrange for the refriger-
ant that is contained in the
product to be recycled or
disposed of by a certified
competent person in accord-
ance with the regulations.

Notes on the documentation 2
0020213396_00 flexoTHERM Operating instructions 7
2 Notes on the
documentation
2.1 Observing other applicable
documents
▶You must observe all operating instruc-
tions enclosed with the system compon-
ents.
2.2 Storing documents
▶Keep this manual and all other applic-
able documents safe for future use.
2.3 Applicability of the
instructions
These instructions apply only to:
Applicability: Great Britain
OR Ireland
Product
VWF 57/4
VWF 87/4
VWF 117/4
VWF 157/4
VWF 197/4
Applicability: Great Britain
OR Ireland
Product
VWF 57/4 230 V
VWF 87/4 230 V
VWF 117/4 230 V
3 System overview
3.1 Heat pump system design
A
B
A
B
The heat pump system consists of the
following components:
–Heat pump
–System controller (from VRC 700)
–Outside temperature sensor with DCF
receiver
–System sensor, if required
–With ground heat source: Ground
sensor

4 Product description
8Operating instructions flexoTHERM 0020213396_00
–With air heat source: Air/brine col-
lector(s)
–With well water heat source: Groundwa-
ter module
There is an opportunity for active cooling
to take place via circulation reversal for the
heat sources air, ground and groundwater.
4 Product description
4.1 CE label
The CE label shows that the products
comply with the basic requirements of the
applicable directives as stated on the iden-
tification plate.
The declaration of conformity can be
viewed at the manufacturer's site.
4.2 Safety devices
4.2.1 Frost protection function
The frost protection function for the system
is controlled via the system controller. If
the system controller fails, the heat pump
guarantees limited frost protection for the
heating circuit.
4.2.2 Protection against low heating
water pressure
This function continuously monitors the
pressure of the heating water in order to
prevent a possible loss of heating water.
4.2.3 Brine loss protection system
The brine loss protection system continu-
ously monitors the fluid pressure in the
environment circuit in order to prevent a
possible shortage of fluid.
4.2.4 Freeze protection
This function prevents the evaporator from
freezing when the heat source temperat-
ure drops below a certain value.
The outlet temperature of the heat source
is constantly measured. If the outlet tem-
perature of the heat source falls below a
certain value, the compressor temporarily
switches off and displays a status mes-
sage. If this fault occurs three times in a
row, it is switched off and a fault message
is displayed.
4.2.5 Pump- and valve-blocking
protection system
This function prevents the pumps for heat-
ing water and brine and all diverter valves
from sticking. The pumps and the valves,
which were out of operation for 23 hours,
are switched on for 10 - 20 seconds, one
after the other.
4.2.6 High-pressure pressure switch
in the refrigeration circuit
The high-pressure pressure switch shuts
down the heat pump if the pressure in the
coolant circuit is too high. If the pressure
in the heat pump's refrigeration circuit ex-
ceeds the maximum pressure, the high-
pressure pressure switch temporarily shuts
down the heat pump. Following a waiting
period, another attempt is made to start
the heat pump. After three failed start at-
tempts in succession, a fault message is
displayed.
–Refrigeration circuit pressure max.: 4.60
MPa (g) (46.00 bar (g))
–Waiting period: 5 minutes (after the first
occurrence)
–Waiting period: 30 minutes
(after the second and every further oc-
currence)
The fault counter is reset if both of the
following conditions are met:
–Heat requirement without switching off
prematurely
–60 minutes of uninterrupted operation

Product description 4
0020213396_00 flexoTHERM Operating instructions 9
4.2.7 Hot gas thermostat in the
refrigeration circuit
The hot gas thermostat shuts down the
heat pump if the temperature in the refri-
geration circuit is too high. If the temperat-
ure in the heat pump's refrigeration circuit
exceeds the maximum temperature, the
hot gas thermostat temporarily shuts down
the heat pump. Following a waiting period,
another attempt is made to start the heat
pump. After three failed start attempts in
succession, a fault message is displayed.
–Max. refrigeration circuit temperature:
130 ℃
–Waiting period: 5 minutes (after the first
occurrence)
–Waiting period: 30 minutes
(after the second and every further oc-
currence)
The fault counter is reset if both of the
following conditions are met:
–Heat requirement without switching off
prematurely
–60 minutes of uninterrupted operation
4.2.8 Safety cut-out (SCO) in the
heating circuit
If the temperature in the heating circuit of
the internal auxiliary electric heating ex-
ceeds the maximum temperature, the SCO
shuts down the auxiliary electric heating as
a securing measure. Following a waiting
period, another attempt is made to start
the auxiliary electric heating. A fault mes-
sage is displayed that can only be reset by
pressing the Reset button or by switching
the heat pump off and on again.
–Max. heating circuit temperature: 85 ℃
4.3 Serial number
The serial number is located on a plate be-
hind the front flap. The 7th to 16th digits of
the serial number form the article number.
4.4 Product design
1
2
3
4
1
2
3
4
1 Front flap
2 Recessed
handle
3 Control elements
4 Plate showing
the serial num-
ber
4.5 Opening the front flap
1. Take hold of the recessed handle in
the front flap on the left- or right-hand
side.
2. Pull the recessed handle.

4 Product description
10 Operating instructions flexoTHERM 0020213396_00
4.6 Operator control panel
50 d
kWh
reset
1
2
3
4
6
7
8
9
5
1 Displays the
daily environ-
mental energy
yield
2 Display of the
current as-
signment of
the right-hand
selection button
3 Left- and right-
hand selection
buttons
4and but-
ton
5 Reset button
6 Access to the
menu for addi-
tional information
7 Display of the
current configur-
ation of the left-
hand selection
button
8 Displays the
symbols for the
current operat-
ing status of the
heat pump
9 Display
4.7 Basic display
50 d
kWh
Sym-
bol
Meaning Explanation
Compressor –Filled: Com-
pressor in op-
eration
–Not filled:
Compressor
not in
operation
bar
Current filling
pressure of the
heating system
The dashed lines
show the permit-
ted range.
–Permanently
on: Filling
pressure in
the permitted
range.
–Flashing:
Filling pres-
sure outside
the permitted
range.
Pumps –Left continu-
ously on: Brine
pump in oper-
ation
–Right con-
tinuously on:
Heating pump
in operation
Auxiliary electric
heating
–Flashing: Aux-
iliary electric
heating in op-
eration
–+ : Aux-
iliary electric
heating act-
ive for heating
mode
–+ : Aux-
iliary electric
heating active
for hot water
handling mode
Green iQ mode –Product
equipped with
energy-saving
technology