Vaillant AROTHERM VWL ../2 A series User manual

For the operator
Operating instructions
aroTHERM
VWL ../2 A 230 V
GB
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 aroTHERM 0020151761_04
Contents
1 Safety ............................................ 3
1.1 Action-related warnings ................. 3
1.2 General safety information............. 3
1.3 Intended use .................................. 7
1.4 CE label ......................................... 8
2 Notes on the documentation ...... 9
2.1 Observing other applicable
documents ..................................... 9
2.2 Storing documents......................... 9
2.3 Applicability of the instructions....... 9
3 Product description................... 10
3.1 Design of the heat pump
system ......................................... 10
3.2 Type designation and serial
number......................................... 11
3.3 Overview of the operator control
elements of the VWZ AI heat
pump control module ................... 11
3.4 Digital Information and Analysis
System (DIA) ............................... 11
4 Operation.................................... 12
4.1 Operating concept ....................... 12
4.2 Basic display................................ 12
4.3 Operating levels........................... 13
4.4 Design of the menu...................... 13
4.5 Live Monitor (status codes).......... 13
4.6 Displaying the building circuit
pressure....................................... 14
4.7 Reading the operating
statistics ....................................... 14
4.8 Displaying contact data................ 14
4.9 Displaying the serial number
and article number ....................... 14
4.10 Setting the display contrast.......... 14
4.11 Setting the language.................... 14
5 Operation.................................... 14
5.1 Switching the product on/off ........ 14
5.2 Operating noises.......................... 15
5.3 Activating frost protection ............ 15
5.4 Setting the target feed
temperature in heating mode....... 15
5.5 Setting a room thermostat or
weather compensator .................. 15
5.6 Checks and maintenance
carried out by the operator........... 15
5.7 Having the product temporarily
decommissioned.......................... 16
6 Troubleshooting ........................ 16
6.1 Reading the fault message .......... 16
6.2 Detecting and rectifying faults...... 17
7 Decommissioning...................... 18
7.1 Having the product permanently
decommissioned.......................... 18
8 Recycling and disposal............. 18
8.1 Recycling and disposal ................ 18
8.2 Arranging disposal of coolant ...... 18
9 Guarantee and customer
service ........................................ 18
9.1 Guarantee.................................... 18
9.2 Customer service......................... 19

Safety 1
0020151761_04 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 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 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.
1.2.2 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.
1.2.3 Danger due to improper
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.
Only use the product in accord-
ance with the provisions.

1 Safety
4Operating instructions aroTHERM 0020151761_04
1.2.4 Preventing the risk of
injury from corrosive
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.
1.2.5 Preventing the risk of
injury due to scalding
from hot and cold
components
Particularly in the coolant 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.
1.2.6 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.
1.2.7 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
injuries, e.g. due to explosions.
▶Have your competent person
check that all required isolator
devices are present in your
heating installation.
1.2.8 Preventing the risk of
injury from freezing
as a result of touching
coolant
The product is delivered with
an operational filling of R410A
coolant. This is a chlorine-free
coolant which does not affect
the Earth's ozone layer. R410A
is neither a fire hazard nor an
explosion risk. 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 steam or
gases that escape from the
coolant circuit as a result of
leaks.

Safety 1
0020151761_04 aroTHERM Operating instructions 5
▶Avoid skin or eye contact with
the coolant.
▶In the event of skin or eye
contact with the coolant, seek
medical advice.
1.2.9 Danger due to
changes to the product
environment
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 changes to the product
environment.
Changes must not be made to
the following equipment:
–The heat pump
–The heat pump environment
–The drain line and expansion
relief valve for the heating
water
–The water and electricity sup-
ply lines
–The heat pump's condensate
drain pipework
–The structural conditions that
may affect the operational
safety of the product.
1.2.10 Risk of injury and
material damage due to
incorrect maintenance
or repairs
As a result of unauthorised in-
terference or tampering with the
product or parts of the system,
the operational safety of the
product can no longer be en-
sured and the guarantee there-
fore becomes void.
▶Never interfere or tamper with
the product or other parts of
the system.
▶Never try to carry out main-
tenance work or repairs on
the product yourself.
▶Do not damage or remove
any seals on components.
Only qualified competent
persons and factory service
personnel are authorised to
make modifications to sealed
components.
▶Have inspection and main-
tenance work carried out by a
competent person.
1.2.11 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.

1 Safety
6Operating instructions aroTHERM 0020151761_04
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.
1.2.12 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.
1.2.13 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
generator to maintain the oper-
ational 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.
1.2.14 Malfunction caused
by incorrect system
pressure
To avoid operating the system
with too little water and thus
prevent resulting damage, note
the following:
▶Check the system pressure
of the heating installation at
regular intervals.
▶You must observe the system
pressure instructions.
1.2.15 Malfunction due to
incorrect power supply
The power supply must remain
within the specified limits so that
the product does not malfunc-
tion:
–1 phase: 230 V (+10/-15%)
~50 Hz
–3 phases: 400 V (+10/-15%) 3
N ~50 Hz

Safety 1
0020151761_04 aroTHERM Operating instructions 7
1.2.16 Avoid environmental
damage caused by
escaping coolant
The product contains R410A
coolant. The coolant must not
be allowed to escape into the
atmosphere. R410A is a fluor-
inated greenhouse gas covered
by the Kyoto Protocol, with a
GWP of 1725 (GWP = Global
Warming Potential). If this gas
escapes into the atmosphere,
its impact is 1725 times greater
than the natural greenhouse
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
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 coolant circuit or
access it.
▶Arrange for the coolant con-
tained in the product to be
recycled or disposed of by
certified competent persons in
accordance with regulations.
1.3 Intended use
1.3.1 State-of-the-art
technology
The Vaillant aroTHERM heat
pump systems are construc-
ted using state-of-the-art tech-
nology in accordance with the
recognised safety rules and
regulations. However, 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.
1.3.2 User qualification
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.
1.3.3 Intended use
The Vaillant aroTHERM heat
pump is designed for use as a
heat generator for closed heat-
ing installations. Operation of

1 Safety
8Operating instructions aroTHERM 0020151761_04
the pump outside the applic-
ation limits results in the heat
pump being switched off by
the internal control and safety
devices.
1.3.4 Improper use
Any use which is not explicitly
mentioned in the section "Inten-
ded use" is deemed improper.
Any other or additional use
does not comply with the inten-
ded use. Any direct commercial
or industrial use is also deemed
to be improper.
1.3.5 Observing other
applicable documents
Intended use also includes the
observance of accompanying
operating, installation and ser-
vicing instructions for Vaillant
products as well as for other
parts and components of the
system.
1.3.6 Liability and secondary
clauses
The manufacturer/supplier is
not liable for any claims or dam-
age resulting from improper
use. The user alone bears the
risk.
Caution.
Improper use of any kind is
prohibited.
1.4 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 manufac-
turer's site.

Notes on the documentation 2
0020151761_04 aroTHERM Operating instructions 9
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 for the fol-
lowing heat pumps, hereinafter referred to
as the "product":
Type designation Art. no.
aroTHERM VWL
55/2 A 230 V
0010014566
aroTHERM VWL
85/2 A 230 V
0010011971
aroTHERM VWL
115/2 A 230 V
0010011972
aroTHERM VWL
155/2 A 230 V
0010014567
The product's article number is part of the
serial number (→Page 11).

3 Product description
10 Operating instructions aroTHERM 0020151761_04
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 module
–Additional hydraulic components, if required
–System controller
The heat pump can be operated by the VWZ AI heat pump control module. The exten-
ded operation of the heat pump is carried out by the system controller.