Vaillant aroTHERM VWL 85/2 User manual

For the operator
Instructions for use
aroTHERM
VWL 85/2; VWL 115/2
UK
Instructions for use
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Telefon [phone]‑0 Telefax 021 91 18‑28 10
[email protected] www.vaillant.de

Contents
2Instructions for use aroTHERM 0020151761_00
Contents
1 Safety .................................................................... 4
1.1 Action-related warnings ......................................... 4
1.2 General safety information .................................... 4
1.3 Intended use .......................................................... 9
1.4 CE label ............................................................... 10
2 Notes on the documentation ............................ 11
2.1 Observing other applicable documents ............... 11
2.2 Storing documents............................................... 11
2.3 Applicability of the instructions ............................ 11
3 Product description........................................... 12
3.1 Design of the heat pump system ......................... 12
3.2 Type designation and serial number ................... 14
3.3 Overview of the operator control elements of
the VWZ AI heat pump control module................ 14
3.4 Digital Information and Analysis System (DIA).... 14
4 Operation............................................................ 16
4.1 Operating concept ............................................... 16
4.2 Basic display........................................................ 17
4.3 Operating levels................................................... 17
4.4 Design of the menu.............................................. 18
4.5 Live Monitor (status codes) ................................. 19
4.6 Displaying the building circuit pressure ............... 19
4.7 Reading the operating statistics .......................... 19
4.8 Displaying contact data........................................ 19
4.9 Displaying the serial number and article
number................................................................. 19
4.10 Setting the display contrast ................................. 19
4.11 Setting the language............................................ 20
5 Operation............................................................ 20
5.1 Switching the product on/off ................................ 20
5.2 Activating frost protection .................................... 20
5.3 Setting the target feed temperature in heating
mode.................................................................... 20
5.4 Setting a room thermostat or weather
compensator ........................................................ 20
5.5 Checks and maintenance carried out by the
operator ............................................................... 21
5.6 Having the product temporarily
decommissioned.................................................. 21
6 Troubleshooting ................................................ 22
6.1 Reading the fault message.................................. 22
6.2 Detecting and rectifying faults ............................. 23
7 Decommissioning.............................................. 24
7.1 Having the product permanently
decommissioned.................................................. 24
8 Recycling and disposal..................................... 24
8.1 Disposing of the packaging ................................. 24
8.2 Disposing of the product and accessories........... 24
8.3 Arranging disposal of coolant .............................. 24

Contents
0020151761_00 aroTHERM Instructions for use 3
9 Guarantee and customer service..................... 24
9.1 Guarantee............................................................ 24
9.2 Customer service................................................. 25
Index ....................................................................................26

1 Safety
4Instructions for use aroTHERM 0020151761_00
1 Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
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 environmental
damage
1.2 General safety information
1.2.1 Danger due to incorrect handling
▶Read through these instructions carefully.
▶When using the product, observe the gen-
eral safety information and warnings.
▶When using the product, observe all applic-
able national regulations .
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 surfaces.
▶Prevent steam/air mixtures from forming.
Keep brine fluid vessels closed.
▶Observe the safety data sheet that accom-
panies the brine fluid.

Safety 1
0020151761_00 aroTHERM Instructions for use 5
1.2.3 Danger due to improper 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.
Only use the product in accordance with the
provisions.
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 protective
goggles.
▶Do not inhale or swallow.
▶Observe the safety data sheet that accom-
panies the brine fluid.
1.2.5 Preventing the risk of injury due
to scalding from hot and cold
components
Particularly in the coolant circuit, the compon-
ents of the heat pump can reach high temper-
atures or extremely low temperatures.
▶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 Safety
6Instructions for use aroTHERM 0020151761_00
1.2.7 Risk of death due to lack of safety
devices
A lack of safety devices (e.g. expansion relief
valve, expansion 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 heat pump is delivered with an oper-
ational 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 com-
ponents of the heat pump.
▶Do not inhale any steam or gases that es-
cape from the coolant 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.
1.2.9 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 supply lines
–The heat pump's condensate drain pipe-
work

Safety 1
0020151761_00 aroTHERM Instructions for use 7
–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 interference or
tampering with the product or parts of the
system, the operational safety of the product
can no longer be ensured and the guarantee
therefore becomes void.
▶Never interfere or tamper with the product
or other parts of the system.
▶Never try to carry out maintenance 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 maintenance 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 heat-
ing installation always remains in opera-
tion during freezing conditions and that all
rooms are sufficiently heated.
Even if rooms, or the whole dwelling, are not
in use for certain 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.
1.2.12 Frost damage caused by insufficient
room temperature
If the room temperature is set too low in indi-
vidual rooms, it cannot be ruled out that sec-
tions of the heating installation might be dam-
aged by frost.

1 Safety
8Instructions for use aroTHERM 0020151761_00
▶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 in-
structions.
1.2.13 Frost damage caused by a power
cut
During installation, your competent person
connected your product to the power mains.
If the power supply is cut, it is possible that
parts of the heating installation may become
damaged by frost. If you want to use an emer-
gency power generator to maintain the opera-
tional readiness of the product during a power
cut, note the following:
▶Contact your competent person for advice
on installing an emergency power gener-
ator.
▶Ensure that the technical values of this
generator (frequency, 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 Avoid environmental damage
caused by escaping coolant
The heat pump contains R410A coolant.
The coolant must not be allowed to escape
into the atmosphere. R410A is a fluorinated
greenhouse gas covered by the Kyoto Pro-
tocol, with a GWP of 1725 (GWP = Global
Warming Potential). If it escapes into the
atmosphere, its impact is 1725 times stronger
than the natural greenhouse gas CO2.
Before the heat pump is disposed of, the
coolant it contains must be completely
drained into a suitable vessel so that it can

Safety 1
0020151761_00 aroTHERM Instructions for use 9
then be recycled or disposed of in accordance
with the regulations.
▶Ensure that only officially certified com-
petent persons with appropriate protective
equipment perform maintenance work or
access the coolant circuit.
▶The coolant in the heat pump must only be
recycled or disposed of by certified com-
petent persons in accordance with the reg-
ulations.
1.3 Intended use
1.3.1 State-of-the-art technology
The Vaillant aroTHERM heat pump systems
are constructed using state-of-the-art techno-
logy 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 over
eight years old and also by persons with lim-
ited physical, sensory or mental capabilities
or insufficient experience and/or knowledge if
they are supervised or have been provided
with instructions on how to safely use the
product, and they understand the risks res-
ulting from using the product. 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 de-
signed for use as a heat generator for closed
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.

1 Safety
10 Instructions for use aroTHERM 0020151761_00
1.3.4 Improper use
Any use which is not explicitly mentioned in
the section "Intended use" is deemed im-
proper.
Any other or additional use does not comply
with the intended use. Any direct commer-
cial or industrial use is also deemed to be im-
proper.
1.3.5 Observing other applicable
documents
Intended use also includes the observance
of accompanying operating, installation and
servicing 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 damage resulting from improper
use. The user alone bears the risk.
Caution.
Improper use of any kind is prohibited.
1.4 CE label
CE labelling shows that, based on the
type overview, the products comply with the
basic requirements of the following directives.

Notes on the documentation 2
0020151761_00 aroTHERM Instructions for use 11
2 Notes on the documentation
2.1 Observing other applicable documents
▶You must observe all operating instructions enclosed with
the system components.
2.2 Storing documents
▶Keep this manual and all other applicable documents
safe for future use.
2.3 Applicability of the instructions
These instructions apply only for the following heat pumps,
hereinafter referred to as the "product":
Type designation Art. no.
aroTHERM VWL 85/2 A 230 V 0010011971
aroTHERM VWL 115/2 A 230 V 0010011972
The product's article number is part of the serial number
(→Page 14).

3 Product description
12 Instructions for use aroTHERM 0020151761_00
3 Product description
3.1 Design of the heat pump system
M
e
The heat pump system consists of the following components:

Product description 3
0020151761_00 aroTHERM Instructions for use 13
–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 extended operation of the heat pump is car-
ried out by the system controller.

3 Product description
14 Instructions for use aroTHERM 0020151761_00
3.2 Type designation and serial number
1
1
The type designation and serial number are on the identifica-
tion plate (1).
3.3 Overview of the operator control elements
of the VWZ AI heat pump control module
1
2
3
1 Fault clearance key
The fault clearance key is
used to reset the heat
pump faults and heat
pump accessory faults.
2 Operating buttons
3 Display
3.4 Digital Information and Analysis System
(DIA)
The product is equipped with a Digital Information and Ana-
lysis System (DIA system). This system provides information
on the operating status of the product and helps you to rectify
faults.

Product description 3
0020151761_00 aroTHERM Instructions for use 15
The display lights up
–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 trig-
ger any other function.
The light goes out after one minute if you do not press any
button.
DIA system operator control elements
50kWh/d
1
2
3
4
7
5
6

4 Operation
16 Instructions for use aroTHERM 0020151761_00
1 Display of the daily energy
yield
2 Display of the current
configuration of the right-
hand selection button
3 Left- and right-hand selec-
tion buttons
4 Minus and plus buttons
5 Access to the menu for
additional information
6 Display of the current
configuration of the left-
hand selection button
7 Display of the symbols for
the active operating 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: Cooling 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.
4 Operation
4.1 Operating concept
You can operate the product using the selection 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 activa-
tion of an operating mode
–You can go one selection level higher in the menu.
By pressing :
–You can confirm a set value or the activation of an operat-
ing 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 selected 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 proced-
ure. If you do not press any buttons for longer 15 minutes,
the display returns to the basic display.

Operation 4
0020151761_00 aroTHERM Instructions for use 17
Menu
Water pressure
Live Monitor
Information
Back Select
A highlighted object is indicated in the display as light text on
a dark background.
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 selection 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 import-
ant information and offers set-up options which do not require
any special prior knowledge.
The operating level for the competent person is reserved
for the competent person only and is protected by a code.
In this level, the competent person can set system-specific
parameters.

4 Operation
18 Instructions for use aroTHERM 0020151761_00
4.4 Design of the menu
Menu
Water pressure
Live Monitor
Information
Back Select
1
4
2
3
1 Scroll bar
(only appears if there are
more list entries than can
be shown at once on the
display)
2 Current configuration of
the right- and left-hand
selection buttons
(soft key function)
3 Selection level list entries
4 Name of the 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 ¬
Contact data.
4.4.1 Operator level overview
Setting level Unit
Menu →Yield indicator→
Heating
Cooling
Menu →Live Monitor
Heating:
Compressor switch-off
Building circuit
Pressure
Target flow temp.
Current flow temp.
Compressor
Modulation
Air inlet temperature
Cooling output
Menu →Information
Contact details
Serial number
Device specific number
Operating hrs. Total
Operating hrs. Heating

Operation 4
0020151761_00 aroTHERM Instructions for use 19
Setting level Unit
Operating hrs. Cooling
Menu →Basic settings →
Language 15
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 pressure 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 operating 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 displayed.
–The article number is found in the second line of the serial
number.
4.10 Setting the display contrast
Menu →Basic settings →Display contrast
–You can use this function to adjust the display contrast to
suit your needs.

5 Operation
20 Instructions for use aroTHERM 0020151761_00
4.11 Setting the language
If you want to set another language:
▶Press and hold and at the same time.
▶Also press the fault clearance key for a short time.
▶Press and hold and until the display shows the
language setting.
▶Select the required language by pressing or .
▶Press (OK) to confirm your selection.
▶Once you have set the correct language, press (OK)
again to confirm this.
5 Operation
5.1 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.
5.2 Activating frost protection
▶To prevent the product from freezing, ensure that the
product is switched on.
5.3 Setting the target feed temperature in
heating mode
The actual target flow temperature is automatically determ-
ined by the system controller (you can find further information
about this in the operating instructions for the system control-
ler).
5.4 Setting a room thermostat or weather
compensator
2
1
▶Set the room thermostat or the weather compensator (1)
and thermostatic radiator valves (2) as specified in the
relevant instructions for these accessories.