Vaillant aroTHERM VWL 55/3 A 230 V User manual

Operating instructions
aroTHERM
VWL 55/3 A 230 V
VWL 85/3 A 230 V
GB
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone] Fax [phone]
[email protected] www.vaillant.de

Contents
2Operating instructions aroTHERM 0020218065_01
Contents
1 Safety ............................................ 3
1.1 Action-related warnings ................. 3
1.2 Intended use .................................. 3
1.3 General safety information............. 4
2 Notes on the documentation ...... 8
2.1 Observing other applicable
documents ..................................... 8
2.2 Storing documents......................... 8
2.3 Validity of the instructions .............. 8
3 Product description..................... 9
3.1 Design of the heat pump
system ........................................... 9
3.2 Type designation and serial
number......................................... 10
3.3 Overview of the control
elements of the VWZ AI heat
pump control interface module .... 10
3.4 Digital Information and Analysis
System (DIA) ............................... 10
3.5 CE marking .................................. 11
4 Operation.................................... 11
4.1 Operating concept ....................... 11
4.2 Basic display................................ 12
4.3 Operating levels........................... 12
4.4 Menu display................................ 12
4.5 Live Monitor (status codes).......... 13
4.6 Displaying the building circuit
pressure....................................... 13
4.7 Reading the operating
statistics ....................................... 13
4.8 Displaying contact data................ 13
4.9 Displaying the serial number
and article number ....................... 13
4.10 Setting the display contrast.......... 13
4.11 Setting the language.................... 13
4.12 Switching the product on/off ........ 13
4.13 Operating noises.......................... 14
4.14 Activating frost protection ............ 14
4.15 Setting the target feed
temperature in heating mode....... 14
4.16 Setting a room thermostat or
weather compensator .................. 14
4.17 Checks and maintenance
carried out by the operator........... 14
4.18 Temporarily decommissioning
the product................................... 15
5 Care and maintenance .............. 15
5.1 Caring for the product .................. 15
5.2 Maintenance ................................ 15
6 Troubleshooting ........................ 15
6.1 Reading the fault message .......... 15
6.2 Detecting and rectifying faults...... 16
7 Decommissioning...................... 17
7.1 Permanently decommissioning
the product................................... 17
8 Recycling and disposal............. 17
8.1 Recycling and disposal ................ 17
8.2 Arranging disposal of
refrigerant .................................... 17
9 Guarantee and customer
service ........................................ 17
9.1 Guarantee.................................... 17
9.2 Customer service......................... 18

Safety 1
0020218065_01 aroTHERM 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 follow-
ing 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 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 product is intended for use
as a heat generator in closed
central heating installations.
Operation of the pump outside
the application limits results in
the heat pump being switched
off by the internal control and
safety devices.
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-
volved. 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-

1 Safety
4Operating instructions aroTHERM 0020218065_01
mercial or industrial use is also
deemed to be improper.
Caution.
Improper use of any kind is
prohibited.
1.3 General safety
information
1.3.1 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.
▶Only carry out the activities
for which instructions are
provided in these operating
instructions.
1.3.2 Risk of death due to
explosions and
scaldings from brine
fluid
The brine fluid ethylene and
propylene glycol is extremely
flammable, both as liquid and
steam. A potentially explosive
combination of steam/air may
form.
▶Keep away from heat, sparks,
naked flames and hot sur-
faces.
▶Prevent steam/air mixtures
from forming. Keep brine fluid
vessels closed.
▶Observe the safety data sheet
that accompanies the brine
fluid.
1.3.3 Risk of death due to lack
of safety devices
A lack of safety devices (e.g.
expansion relief valve, expan-
sion vessel) can lead to poten-
tially fatal scalding and other in-
juries, e.g. due to explosions.
▶Have your competent person
check that all required isolator
devices are present in your
heating installation.
1.3.4 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 tamper-proof seals on
components.
▶Do not make any changes:
–The product itself
–To the supply lines
–On the drain pipework
–On the expansion relief
valve for the heat source
circuit

Safety 1
0020218065_01 aroTHERM Operating instructions 5
–to constructional condi-
tions that may affect the
operational reliability of the
product
1.3.5 Risk of chemical burns
caused by brine fluid
The brine fluid ethylene glycol is
harmful to health.
▶Avoid contact with the skin
and eyes.
▶Always wear gloves and pro-
tective goggles.
▶Do not inhale or swallow.
▶Observe the safety data sheet
that accompanies the brine
fluid.
1.3.6 Preventing the risk of
injury due
to scalding from hot
and cold components
Particularly in the refrigerant cir-
cuit, the components of the heat
pump can reach high temperat-
ures or extremely low temperat-
ures.
▶Do not touch any uninsulated
pipelines in any part of the
heating installation.
▶Do not remove any casing
sections.
1.3.7 Risk of being scalded by
hot drinking water
There is a risk of scalding at
the hot water draw-off points
if the hot water temperatures
are greater than 50 °C. Young
children and elderly persons are
particularly at risk, even at lower
temperatures.
▶Select the temperature so
that nobody is at risk.
1.3.8 Risk of injury
from freezing caused
by touching refrigerant
The product is delivered with
an operational filling of R410A
refrigerant. Escaping refrigerant
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 refrigerant.
▶In the event of skin or eye
contact with the refrigerant,
seek medical advice.
1.3.9 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.

1 Safety
6Operating instructions aroTHERM 0020218065_01
▶Faults and damage should
be immediately rectified by a
competent person.
▶Adhere to the maintenance
intervals specified.
1.3.10 Frost damage due to an
unsuitable installation
site
Frost poses a risk of damage
to the product and the whole
heating installation.
▶You should therefore ensure
that the heating installation
always remains in operation
during freezing conditions and
that all rooms are sufficiently
heated.
Even if rooms, or the whole
dwelling, are not in use for cer-
tain periods, the heating must
remain in operation.
Frost protection and monitoring
devices are only active while
the product is connected to
the power supply. The product
must be connected to the power
supply.
1.3.11 Frost damage caused
by insufficient room
temperature
If the room temperature is set
too low in individual rooms, it
cannot be ruled out that sec-
tions of the heating installation
might be damaged by frost.
▶If you are going to be away
during a cold period, ensure
that the heating installation
remains in operation and that
the rooms are sufficiently
heated.
▶You must observe the frost
protection instructions.
1.3.12 Frost damage caused
by a power cut
During installation, your com-
petent person connected your
product to the power mains.
If the power supply is cut, it is
possible that parts of the heat-
ing installation may become
damaged by frost. If you want to
use an emergency power gen-
erator to maintain the opera-
tional readiness of the product
during a power cut, note the fol-
lowing:
▶Contact your competent per-
son for advice on installing an
emergency power generator.
▶Ensure that the technical val-
ues of this generator (fre-
quency, voltage, earthing)
match those of the power
mains.
1.3.13 Malfunction caused
by incorrect system
pressure
To avoid operating the system
with too little water and thus

Safety 1
0020218065_01 aroTHERM Operating instructions 7
prevent resulting damage, note
the following:
▶Check the system pressure
of the heating installation at
regular intervals.
▶You must observe the system
pressure instructions.
1.3.14 Risk of environmental
damage caused by
refrigerant
The product contains a refriger-
ant that must not be allowed to
escape into the atmosphere.
▶Ensure that a competent per-
son who is qualified to work
with refrigerants services the
product and, after decommis-
sioning, recycles or disposes
of it.
1.3.15 Avoid environmental
damage caused by
escaping refrigerant
The product contains the refri-
gerant R410A. The refrigerant
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 refrigerant that is con-
tained in it must be completely
drained into a suitable vessel so
that it can then be recycled or
disposed 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 refrigerant
contained in the product to
be recycled or disposed of by
certified competent persons in
accordance with regulations.

2 Notes on the documentation
8Operating instructions aroTHERM 0020218065_01
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 Validity of the instructions
These instructions apply only for the fol-
lowing heat pumps, hereinafter referred to
as the "product":
Type designation Art. no.
aroTHERM VWL
55/3 A 230 V
0010019758
aroTHERM VWL
85/3 A 230 V
0010019759
The product's article number is part of the
serial number (→Page 10).

Product description 3
0020218065_01 aroTHERM Operating instructions 9
3 Product description
3.1 Design of the heat pump system
M
e
The heat pump system consists of the following components:
–Heat pump
–VWZ AI heat pump control interface module
–Additional hydraulic components, if required
–System control
The heat pump can be operated by the VWZ AI heat pump control interface module.
The extended operation of the heat pump is carried out by the system controller.
The product contains fluorinated greenhouse gases in a hermetically sealed device.

3 Product description
10 Operating instructions aroTHERM 0020218065_01
3.2 Type designation and serial
number
1
1
The type designation and serial number
are on the data plate (1).
3.3 Overview of the control
elements of the VWZ AI heat
pump control interface module
1
2
3
1 Reset button
The reset button
is used to reset
the heat pump
faults and heat
pump accessory
faults.
2 Operating but-
tons
3 Display
3.4 Digital Information and
Analysis System (DIA)
The product is equipped with a Digital In-
formation and Analysis System (DIA sys-
tem). This system provides you with in-
formation about the product's operating
mode and helps you to eliminate faults.
The display lights up if you
–if you switch on the product or
–if you press a button in the DIA system
while the product is switched on. At first,
pressing this button does not trigger any
other function.
The light goes out after one minute if you
do not press any button.
50kWh/d
1
2
3
4
7
5
6
1 Display of the
daily energy
yield
2 Display of the
current configur-
ation of the right-
hand selection
button
3 Left- and right-
hand selection
buttons
4 Minus and plus
buttons

Operation 4
0020218065_01 aroTHERM Operating instructions 11
5 Access to the
menu for addi-
tional information
6 Display of the
current configur-
ation of the left-
hand selection
button
7 Display of the
symbols for the
active operat-
ing status of the
pumps
Heating mode:
–The symbol lights up permanently: Heat
requirement is present
–The symbol is not visible: Heating mode
is not active
Cooling mode:
–The symbol lights up permanently: Cool-
ing requirement is present
–The symbol is not visible: Cooling mode
is not active
Current power:
–The display shows the current heat
pump output.
Fault:
F.XXX
–Fault in the heat pump. Appears instead
of the basic display; a plain text display
explains the displayed fault code.
3.5 CE marking
The CE marking shows that the products
comply with the basic requirements of the
applicable directives as stated on the de-
claration of conformity.
The declaration of conformity can be
viewed at the manufacturer's site.
4 Operation
4.1 Operating concept
You can operate the product using the se-
lection buttons and the plus/minus buttons.
Both selection buttons have a soft key
function, i.e. their function can change.
By pressing :
–You can cancel the change to a set
value or the activation of an operating
mode
–You can go one selection level higher in
the menu.
By pressing :
–You can confirm a set value or the activ-
ation of an operating mode
–You can go one selection level lower in
the menu.
By pressing and at the same time:
–You can navigate to the menu.
By pressing or :
–You can scroll through the entries in the
menu
–You can increase or decrease a selec-
ted set value.
Adjustable values are always displayed as
flashing.
You must always confirm a change to a
value. Only then is the new setting saved.
You can press to cancel a procedure.
If you do not press any buttons for longer
than 15 minutes, the display returns to the
basic display.
Menu
Water pressure
Live Monitor
Information
Back Select
A highlighted object is indicated in the
display as light text on a dark background.

4 Operation
12 Operating instructions aroTHERM 0020218065_01
4.2 Basic display
50kWh/d
The displays shows the basic display with
the current status of the product. If you
press a selection button, the activated
function is displayed in the display.
You can switch back to the basic display
by:
–Pressing and thus exiting the selec-
tion levels
–Not pressing any button for longer than
15 minutes.
As soon as a fault message is present,
the basic displays switches to the fault
message.
4.3 Operating levels
The product has two operating levels.
The operating level for the operator shows
the most important information and offers
set-up options which do not require any
special prior knowledge.
The operating level for the competent per-
son is reserved for the competent person
only and is protected by a code. In this
level, the competent person can set sys-
tem-specific parameters.
4.4 Menu display
Xxxx
Xxxxxxxxxxx
Xxxx Xxxxxxx
Xxxxxxxxxx
xxxxxx Xxxxxxx
1
4
3
2
1 Scroll bar
2 Current assign-
ment of the se-
lection buttons
3 Selection level
list entries
4 Selection level
The menu is split into two selection levels.
Note
Path details at the start of a section
specify how to access this function,
e.g. Menu ¬Information ¬Con-
tact data.
4.4.1 End user level overview
Setting level Unit
Menu →Yield indicator→
Heating
Cooling
Menu →Live Monitor
Heating:
Compressor switch-off
Building circuit
Pressure
Flow temp. setpoint
Current flow temp.
Compressor
Modulation
Air inlet temperature
Cooling capacity
Menu →Information
Contact data
Serial number
Device specific number
Operating hours total
Hours heating

Operation 4
0020218065_01 aroTHERM Operating instructions 13
Setting level Unit
Cooling op. hours
Menu →Basic settings →
Language
Display contrast
Menu →Resets →
No sub-items
Available
4.5 Live Monitor (status codes)
Menu →Live Monitor
You can use the Live Monitor to display
the current status of the product.
4.6 Displaying the building circuit
pressure
Menu →Live Monitor →Building circuit
pressure
–You can display the current filling pres-
sure of the heating installation in digital
form.
4.7 Reading the operating
statistics
Menu →Information →Heating op.
hours
Menu →Information →Cooling op.
hours
Menu →Information →Total operating
hours
In each case, you can display the operat-
ing hours for the heating mode, the cooling
mode and the overall operation.
4.8 Displaying contact data
Menu →Information →Contact details
If your competent person has entered their
telephone number during the installation,
you can read this data under Contact
data.
4.9 Displaying the serial number
and article number
Menu →Information →Serial number
–The product's serial number is dis-
played.
–The article number is found in the
second line of the serial number.
4.10 Setting the display contrast
Menu →Default setting →Display con-
trast
–You can use this function to adjust the
display contrast to suit your needs.
4.11 Setting the language
If you want to set another language:
▶Press and hold and at the
same time.
▶Also press the reset button for a short
time.
▶Press and hold and until the
display shows the language setting.
▶Select the required language by press-
ing or .
▶Press (OK) to confirm your selection.
▶Once you have set the correct lan-
guage, press (OK) again to confirm this.
4.12 Switching the product on/off
▶Use a partition with a contact opening
of at least 3 mm (e.g. fuses or power
switches) to de-energise the product.

4 Operation
14 Operating instructions aroTHERM 0020218065_01
4.13 Operating noises
"Hhmmm..." (*)
"Ttsheeh...!"
"Eeee..."
“Clink!"
"Chug, chug,
chug,..."
"Whirr..." (*)
1
2
3
4
5
6
* Permanent oper-
ating noises
The noises listed do not constitute a fault
with the heat pump.
In various operating modes, the noises
come from the heat pump (Start, Thawing,
Stop).
4.14 Activating frost protection
▶To prevent the product from freezing,
ensure that the product is switched on.
4.15 Setting the target feed
temperature in heating mode
The actual target flow temperature is auto-
matically determined by the system con-
troller (you can find further information
about this in the operating instructions for
the system controller).
4.16 Setting a room thermostat or
weather compensator
2
1
▶Set the room thermostat or the weather
compensator (1) and thermostatic radi-
ator valves (2) as specified in the relev-
ant instructions for these accessories.
4.17 Checks and maintenance
carried out by the operator
The product switches off if the filling pres-
sure in the heating installation falls below
0.05 MPa (0.5 bar).
▶Top up with water.
4.17.1 Cleaning the product
▶Switch the product off before you clean
it.
▶Clean the product's casing with a damp
cloth and a little soap. Never use scour-
ing or cleaning agents which could
damage the casing or the control ele-
ments.

Care and maintenance 5
0020218065_01 aroTHERM Operating instructions 15
▶Do not clean the product with a high-
pressure cleaner.
▶At regular intervals, ensure that no
branches or leaves have gathered
around the product.
4.17.2 Checking the maintenance
plan
Danger!
Risk of injury and risk of ma-
terial damage due to neg-
lected or incorrect mainten-
ance and repairs.
Neglected or incorrect mainten-
ance work or repairs may lead
to personal injury or damage to
the product.
▶Never attempt to carry out
maintenance work or repairs
on the product.
▶Employ an authorised heat-
ing specialist company to
complete such work. We re-
commend making a mainten-
ance agreement.
Regular inspection/maintenance of your
product by a competent person is a pre-
requisite for ensuring that the system is
constantly ready and safe for operation,
reliable and has a long service life.
The maintenance intervals depend on the
local conditions and the use of the product.
▶Have wear parts that are relevant to
the function and safety replaced by a
competent person.
4.18 Temporarily decommissioning
the product
▶If, during long periods of absence, the
power supply to the flat and to the
product is interrupted, have the heating
system drained by your competent
person or have it sufficiently protected
against frost.
5 Care and maintenance
5.1 Caring for the product
▶Clean the casing with a damp cloth and
a little solvent-free soap.
▶Do not use sprays, scouring agents,
detergents, solvents or cleaning agents
that contain chlorine.
5.2 Maintenance
An annual inspection of the product carried
out by a competent person is a prerequis-
ite for ensuring that the product is perman-
ently ready and safe for operation, reliable,
and has a long working life.
6 Troubleshooting
6.1 Reading the fault message
Fault 01/3
Back
42
Coding resistor
Delete
Fault messages have priority over all other
displays and are shown instead of the ba-
sic display. If several faults occur at the
same time, these are each displayed al-
ternately for two seconds each.
▶If your product displays a fault mes-
sage, contact a competent person.
▶To find out more information about the
status of your product, call up the "Live
Monitor" (→Page 13).

6 Troubleshooting
16 Operating instructions aroTHERM 0020218065_01
6.2 Detecting and rectifying faults
This section shows all of the fault messages that can be rectified without seeking help
from the competent person in order to start up the product again.
Fault Cause Remedy
The product no longer
works.
The power supply has been disconnec-
ted
Ensure that there has
not been a power cut
and that the product is
correctly connected to
the power supply. When
the power supply is re-
established, the product
automatically starts up.
If a fault is still present,
contact your competent
person.
Noises (hissing, knocking,
humming)
If the heating demand stops, this may lead to bubbling and whistling
noises. These noises are caused by the refrigerant.
When the product starts up or stops, this may lead to creaking
noises. These noises are caused by the casing as it expands or
contracts when the temperature changes.
If the product is functioning, this may lead to humming noises.
These noises are caused by the compressor when the product is in
heating mode.
The product releases
steam.
In winter and during the thawing procedure, steam may escape
from the product. (The heat of the product melts the ice that has
formed.)
Other faults Consult your competent
person.
▶If the product still does not function after the fault has been eliminated, contact your
competent person.

Decommissioning 7
0020218065_01 aroTHERM Operating instructions 17
7 Decommissioning
7.1 Permanently decommissioning
the product
▶Have a competent person permanently
decommission the product.
8 Recycling and disposal
8.1 Recycling and disposal
▶The competent person who installed
your product is responsible for the dis-
posal of the packaging.
If the product is labelled with this
mark:
▶In this case, do not dispose of the
product with the household waste.
▶Instead, hand in the product to a collec-
tion centre for waste electrical or elec-
tronic equipment.
If the product contains batteries that
are labelled with this mark, these batteries
may contain substances that are hazard-
ous to human health and the environment.
▶In this case, dispose of the batteries at
a collection point for batteries.
8.2 Arranging disposal of
refrigerant
The product is filled with R410A refriger-
ant.
▶Refrigerant must only be disposed of by
an authorised competent person.
▶Observe the general safety information.
9 Guarantee and customer
service
9.1 Guarantee
Vaillant provides a full parts and labour
guarantee for this appliance for the dura-
tion as shown on the enclosed registration
card which must be fully completed and
returned within 30 days of installation. All
appliances must be installed by a suitably
competent person fully conversant and
in accordance with all current regulations
applicable to the appliance type installa-
tion. In the case of gas appliances the Gas
Safety (Installation and Use) Regulations
1998, and the manufacturer’s instructions.
In the UK competent persons approved at
the time by the Health and Safety Execut-
ive undertake the work in compliance with
safe and satisfactory standards. Installers
should also be fully conversant with and
competent with all necessary electrical and
building regulations that may apply to the
installation.
In addition all unvented domestic hot water
cylinders must be installed by a compet-
ent person to the prevailing building regu-
lations at the time of installation (G3). All
appliances shall be fully commissioned in
accordance with our installation manual
and Benchmark commissioning check list
(this will be included within the installa-
tion manual). These must be signed and
given to the user for safe keeping during
the hand over process. Installers should
also at this time advise the user of the an-
nual servicing requirements and advise of
appropriate service agreement.
Terms and conditions do apply to the guar-
antee, details of which can be found on the
registration card included with this appli-
ance. In order to qualify for guarantee after
one year the appliance must be serviced
in accordance with our installation manual
servicing instructions. The benchmark ser-
vice history should be completed. Note -

9 Guarantee and customer service
18 Operating instructions aroTHERM 0020218065_01
all costs associated with this service are
excluded from this guarantee.
Failure to install and commission this ap-
pliance in compliance with the manufac-
turer’s instructions will invalidate the guar-
antee (this does not affect the customer’s
statutory rights).
9.2 Customer service
To ensure efficient and reliable operation
of your boiler it is recommended that regu-
lar servicing is carried out by your service
provider.

0020218065_01 19.05.2020
Supplier
Vaillant Ltd.
Nottingham Road Belper Derbyshire DE56 1JT
Telephone [phone]
[email protected] www.vaillant.co.uk
© These instructions, or parts thereof, are protected by copyright and may be
reproduced or distributed only with the manufacturer's written consent.
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