Vaillant aroSTOR VWL B 200/5 UK, aroSTOR VWL B 270/5 UK Operating Instructions Manual

Operating instructions

aroSTOR

VWL B 200/5 UK

VWL B 270/5 UK

GB, IE

Publisher/manufacturer
Vaillant GmbH

Berghauser Str. 40 D-42859 Remscheid
Tel. [phone] Fax [phone]
[e-mail] www.vaillant.de

Contents

2 Operating instructions aroSTOR 0020285064_00

Contents

1 Safety ............................................ 4

1.1 Intended use .................................. 4

1.2 Danger caused by improper

operation........................................ 4

1.3 Risk of death caused by

escaping refrigerant ....................... 4

1.4 Risk of death due to changes
to the product or the product

environment ................................... 5

1.5 Risk of burns caused by touching

hot surfaces ................................... 5

1.6 Risk of being scalded by hot

drinking water ................................ 5

1.7 Preventing the risk of injury from
freezing as a result of touching

refrigerant ...................................... 5

1.8 Risk of injury and material
damage due to maintenance and
repairs carried out incorrectly or

not carried out at all ....................... 6

1.9 Risk of damage from corrosion

caused by unsuitable room air....... 6

1.10 Dangers of modifying product

surroundings .................................. 6

1.11 Frost damage due to insufficient

room temperature .......................... 6

1.12 Avoid environmental damage

caused by escaping refrigerant...... 7

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..................... 8

3.1 Product design ............................... 8

3.2 Overview of the control

elements ........................................ 8

3.3 Displayed symbols ......................... 9

3.4 Type designation and serial

number........................................... 9

3.5 Information on the data plate ......... 9

3.6 CE marking .................................. 10

3.7 Hot Water Association ................. 10

4 Function...................................... 10

4.1 Operating concept ....................... 10

4.2 Switching on the product ............. 10

4.3 Setting the language.................... 11

4.4 Setting the time............................ 11

4.5 Domestic hot water temperature

setting .......................................... 11

4.6 Additional domestic hot water
temperature setting when a
photovoltaic installation is

connected .................................... 11

4.7 Programming operating times...... 12

4.8 Setting the holiday mode ............. 13

4.9 Setting the boost mode................ 13

4.10 Setting limp home mode .............. 13

4.11 Activating the anti-legionella

function ........................................ 13

4.12 Frost protection function .............. 13

5 Troubleshooting ........................ 14

5.1 Detecting and rectifying faults...... 14

6 Maintenance and care ............... 14

6.1 Maintenance ................................ 14

6.2 Caring for the product .................. 14

6.3 Checking the condensate

discharge pipe and tundish.......... 14

7 Decommissioning...................... 14

7.1 Temporarily decommissioning

the product................................... 14

7.2 Permanently decommissioning

the product................................... 14

8 Recycling and disposal............. 14

8.1 Arranging disposal of

refrigerant .................................... 15

9 Guarantee and customer

service ........................................ 15

9.1 Guarantee.................................... 15

Appendix ............................................... 16

A Troubleshooting ........................ 16

Contents

0020285064_00 aroSTOR Operating instructions 3

B Optimising energy

consumption .............................. 17

B.1 Using a low tariff and a control

cable connection.......................... 17

B.2 Using a low tariff without a

control cable connection .............. 18

B.3 Operating with a fixed electricity

tariff.............................................. 19

C End user level – overview ......... 20

1 Safety

4 Operating instructions aroSTOR 0020285064_00

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 product is intended for hot
water generation.

Intended use includes the fol­lowing:

– observance of the operating

instructions included for the
product and any other install­ation 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 supervi­sion or instruction concerning
use of the product in a safe way
and understand the hazards in­volved. 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 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 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 ap­plicable documents, particu­larly the "Safety" section and
the warnings.

▶ Only carry out the activities

for which instructions are
provided in these operating
instructions.

1.3 Risk of death caused by
escaping refrigerant

The product contains R 290
refrigerant.

R 290 is an inflammable refri­gerant.

When refrigerant escapes, there
is a risk of explosion.

Safety 1

0020285064_00 aroSTOR Operating instructions 5

▶ If possible, open doors and

windows fully and ensure
adequate ventilation.

▶ Do not use naked flames (e.g.

lighters, matches).

▶ Do not smoke.
▶ Do not use any electrical

switches, mains plugs, door­bells, telephones or other
communication systems in
the building.

▶ Leave the building immedi-

ately and ensure that others
do not enter the building.

1.4 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
– The water and electricity

supply lines

– to the expansion relief valve
– to the drain pipework
– to constructional condi-

tions that may affect the
operational reliability of the
product

1.5 Risk of burns caused by
touching hot surfaces

The outgoing lines and hy­draulic connections are hot dur­ing operation.

▶ Do not touch any hydraulic

connections.

▶ Do not touch any air inlets or

outlets.

1.6 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 60 °C. Young
children and elderly persons are
particularly at risk, even at lower
temperatures.

▶ Select the temperature so

that nobody is at risk.

1.7 Preventing the risk of
injury from freezing
as a result of touching
refrigerant

The product is delivered with an
operational filling of R 290 re­frigerant. This is a chlorine-free
refrigerant which does not affect
the Earth's ozone layer. Escap­ing refrigerant may cause freez­ing if the exit point is touched.

▶ If refrigerant escapes, do not

touch any components of the
product.

1 Safety

6 Operating instructions aroSTOR 0020285064_00

▶ Do not inhale any steam 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.

1.8 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.

1.9 Risk of damage from
corrosion caused by
unsuitable room air

Sprays, solvents, chlorinated
cleaning agents, paint, adhes­ives, ammonia compounds,
dust or similar substances
may lead to corrosion on the
product.

▶ Ensure that the air supply is

always free of fluorine, chlor­ine, sulphur, dust, etc.

▶ Ensure that no chemical sub-

stances are stored at the in­stallation site.

1.10 Dangers of modifying
product surroundings

Some types of installation and
conversion work in your home
can impair the way your product
operates.

▶ Consult your installer before

undertaking the work in ques­tion.

1.11 Frost damage due to
insufficient room
temperature

If the room temperature is set
too low in individual rooms, it
cannot be ruled out that sec­tions of the heating installation
might be damaged by frost.

The product may release cold
air into the room. This means
the room temperature can fall
below 0 °C.

▶ If you are going to be away

while the outside temperature
is low, ensure that the heating
installation remains in oper­ation and that the rooms are
sufficiently heated.

▶ You must observe the frost

protection instructions.

Safety 1

0020285064_00 aroSTOR Operating instructions 7

1.12 Avoid environmental
damage caused by
escaping refrigerant

The product contains R 290
refrigerant. The refrigerant must
not be allowed to escape into
the atmosphere.

Before the product is disposed
of, the refrigerant that is con­tained 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 equip­ment 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

8 Operating instructions aroSTOR 0020285064_00

2 Notes on the

documentation

2.1 Observing other applicable
documents

▶ You must observe all operating instruc-

tions enclosed with the system compon­ents.

2.2 Storing documents

▶ Keep this manual and all other applic-

able documents safe for future use.

2.3 Validity of the instructions

Validity: Great Britain

These instructions apply only to:

Unit – article number

aroSTOR VWL B 200/5 UK

0010024440

aroSTOR VWL B 270/5 UK

0010028218

3 Product description

The product operates at air temperatures
between -7 °C and +35 °C. Outside of this
temperature range, domestic hot water
generation is only possible when using an
additional power infeed (heating coil).

3.1 Product design

Validity: Great Britain

Validity: aroSTOR VWL B 200/5,

aroSTOR VWL B 270/5

1

2

3

4

5

1 Cold water inlet
2 Domestic hot

water outlet

3 Temperature

and pressure
expansion relief

valve
4 Air supply
5 Air removal

3.2 Overview of the control
elements

4

1

3

2

1 Menu button
2 On and off but-

ton

3 Button for setting

the time

4 Rotary knob

Product description 3

0020285064_00 aroSTOR Operating instructions 9

3.3 Displayed symbols

Sym­bol

Meaning

Compressor in operation

Fan in operation

Defrosting function active

Electric back-up heater in operation

Domestic hot water demand

ECO mode active

Frost protection mode active

Holiday mode active

Photovoltaic mode active

Display locked

Comfort mode active

Programming mode active

3.4 Type designation and serial
number

1

The type designation and serial number
are on the data plate (1).

3.5 Information on the data plate

Validity: Great Britain

OR aroSTOR VWL B 270/5

The data plate is mounted on the right­hand side of the product at the factory.

Information on the
data plate

Meaning

aroSTOR VWL Type designation

B Cylinder type

270 Cylinder volume

Information on the
data plate

Meaning

/5 Unit version

UK Country-specific fea-

ture

COP Coefficient of per-

formance – heating

230 V (single-phase)
~ 50 Hz

Voltage and fre­quency of the
product's power
supply

P max Max. power con-

sumption

I max Max amperage of the

power supply circuit

IP... IP rating/protection

class

Total weight of the
empty product

Nominal capacity of
the cylinder
Max. pressure in the
domestic hot water
circuit
Max. temperature
in the domestic hot
water circuit

P

The refrigeration cir­cuit
Refrigerant type, fill
quantity, permissible
rated excess pres­sure
Nominal heat output
of the refrigeration
circuit

Max. air flow in the
heat pump

P Nominal heat output

of the electric back­up heater

Barcode with serial
number,
The 7th to 16th digits
of the serial number
form the article num­ber

Disposal of the pack­aging

4 Function

10 Operating instructions aroSTOR 0020285064_00

Information on the
data plate

Meaning

The cylinder con­tains a combustible
product

See instructions

3.6 CE marking

The CE marking shows that the products
comply with the basic requirements of the
applicable directives as stated on the data
plate.

The declaration of conformity can be
viewed at the manufacturer's site.

3.7 Hot Water Association

Vaillant is a full member of the Hot Water
Association and promotes the scheme
in association with its cylinder range.
Details are available on the web site
www.vaillant.co.uk

4 Function

4.1 Operating concept

You can use the three buttons to control
the product.

– You can press the menu button to ac-

cess the main menu.

– You can press the rotary knob to select

the menu items and confirm set values.
You can press the rotary knob to set
these values.

– You can use the clock button to set the

time.

The display switches off 180 seconds after
the last operation.

4.2 Switching on the product

1

1. Before starting up the product, ensure
that the plugs (1) have been removed
from the condensate discharge con­nection.

2. Ensure that the stopcock upstream of
the safety group at the cold water inlet
is open.

3. Before switching on the power supply,
ensure that the domestic hot water
cylinder is full.

4. Ensure that the product has been con­nected to the power supply.

5. Press the product's on/off button.

◁ The display switches on.
◁ A green LED lights up on the

display.

◁ The background lighting on the

display flashes and prompts you to
set the language.
– Turn the rotary knob to set the

language. Press the rotary knob
to confirm the selection.

◁ The unit only offers you the lan-

guage selection when it is switched
on for the first time. However, you
have the opportunity to change the
language setting. To do this, follow
the instructions in the section on set­ting the language. (→ Page 11)

◁ The heat pump only starts when

the cold water temperature is be-

Function 4

0020285064_00 aroSTOR Operating instructions 11

low the set water temperature and
when, according to the operating
programme, the switch-on time cor­responds to the heat-up time and
heating is permitted by the electricity
tariff.

◁ When the heat pump is running,

there is an air flow at the air inlet
and outlet.

Note

After the initial start-up, de­pending on the air intake tem­perature and cold water tem­perature, the heat pump re­quires 5 to 12 hours to reach a
temperature of 55 °C.

4.3 Setting the language

▶ If you want to change the current set-

ting, press the menu button.

▶ Turn the rotary knob until the display

shows the language setting.

▶ Press the rotary knob.
▶ Select the required language using the

rotary knob.

▶ Press the rotary knob to confirm.
▶ Press the menu button to return to the

original display.

4.4 Setting the time

▶ Press the clock button.
▶ Press the rotary knob to confirm.
▶ Turn the rotary knob to set the day.
▶ Press the rotary knob to confirm.
▶ Turn the rotary knob to set the month.
▶ Press the rotary knob to confirm.
▶ Turn the rotary knob to set the year.
▶ Press the rotary knob to confirm.
▶ Turn the rotary knob to set the hour.
▶ Press the rotary knob to confirm.
▶ Turn the rotary knob to set the minutes.
▶ Press the rotary knob to confirm.
▶ Press the menu button to return to the

original display.

4.5 Domestic hot water
temperature setting

1. Press the menu button.

2. Turn the rotary knob until the TEMP.

SETT. menu appears in the display.

3. Press the rotary knob.

4. Turn the rotary knob to set the re-

quired domestic hot water temperature
(TARG ET).

5. Press the rotary knob to confirm.

6. Press the menu button to return to the

original display.

4.6 Additional domestic hot water
temperature setting when
a photovoltaic installation is
connected

Note

If this function is activated in the
installer level, the settings can be
made.

1. Press the menu button.

2. Turn the rotary knob until the T°PV

ECO menu appears in the display.

3. Press the rotary knob.

4. Turn the rotary knob to set the desired

domestic hot water temperature, which
is generated using the electrical energy
from the photovoltaic installation.

◁ T°PV ECO: The heat pump heats

the water in the domestic hot water
cylinder up to a temperature above
the normal domestic hot water tem­perature.

◁ T°PV MAX: The heat pump and

immersion heater heat the water in
the domestic hot water cylinder to a
temperature above parameter T°PV
ECO.

4 Function

12 Operating instructions aroSTOR 0020285064_00

Note

When the photovoltaic install­ation generates electricity, the
domestic hot water temperature
setting is automatically adjus­ted.

5. Press the rotary knob to confirm.

6. Press the menu button to return to the
original display.

4.7 Programming operating times

You can optimise the product's energy
consumption (kWh) by programming the
operating hours. Consider the following
points when creating such a programme:

– Electricity tariff tiers (low-/high-tariff peri-

ods)

– Temperature of the drawn-in air (the

product is more efficient during the
warmest parts of the day)

– Check that the product is actuated by a

low-tariff cable

4.7.1 Programming the operating

times for the first day of the
week

▶ Hold down the clock button for

three seconds.

▶ Select the day using the rotary knob.
▶ Press the rotary knob.
▶ Press the rotary knob to create a new

programme for this day.

▶ Turn the rotary knob to set the end of

the first operating time.

▶ Press the rotary knob.
▶ Turn the rotary knob to set the comfort

level for the first operating time.

◁ F-P: Defrosting – the product pre-

vents freezing (water temperature of
at least +5 °C).

◁ ECO: Eco mode – the heat pump

heats the domestic hot water cylinder
to the set target temperature.

◁ COnF: Comfort mode – the heat

pump and the immersion heater heat

the domestic hot water cylinder to
the set target temperature.

▶ Press the rotary knob.
▶ Turn the rotary knob to set the end of

the second operating time.

▶ Press the rotary knob.
▶ Repeat these steps to set additional

operating times (up to seven per day).

▶ Turn the rotary knob to set the end of

the last operating time to its start time.

◁ The end of the operating time is

automatically displayed as 24:00.

▶ Press the rotary knob.
▶ Press the menu button to return to the

original display.

Note

Connecting a photovoltaic in­stallation can cause the product
to go into operation outside of
programmed time periods. The
relevant settings are made by
the competent person. If neces­sary, discuss the setting with
your competent person.

4.7.2 Programming the operating
times for additional days of the
week

▶ Hold down the clock button for

three seconds.

▶ Select the day using the rotary knob.
▶ Press the rotary knob.
▶ Turn the rotary knob to create a pro-

gramme for this day.

▶ You can copy the programme from the

previous day.

▶ If you want to copy the programme for a

different day, select COPY PROG..

▶ You can use MODI FY PR. to change a

copied programme.

▶ You can use SEE PROG. to check an

existing programme.

▶ Press the menu button to return to the

original display.

Function 4

0020285064_00 aroSTOR Operating instructions 13

4.8 Setting the holiday mode

This mode puts the product into standby
operation in which the frost protection
function remains active. This is a program­mable mode. A duration between 1 and 99
days can be programmed. When you con­firm the number of days (1 day = 24-hour
time period), the mode will be activated.

This mode temporarily suspends the set
time programming.

The mode ends automatically once
the set number of days has expired.
Throughout the holiday, the display shows
HOLI.RETUR. (return from holiday) and
the number of days remaining.

▶ Press the menu button.
▶ Turn the rotary knob until the HOLI

DAYS menu appears in the display.

▶ Press the rotary knob.
▶ Turn the rotary knob to set the required

number of days' holiday.

▶ Press the rotary knob.
▶ Press the menu button to return to the

original display.

▶ If you return from holiday earlier than

planned, repeat the steps described
above and set the number of days' holi­day to 0.

4.9 Setting the boost mode

This mode enables temporary simultan­eous operation of the back-up heater (im­mersion heater) and the heat pump, in
order to heat up the domestic hot water
more quickly. The symbol (back-up heater
in operation) flashes. If the set target tem­perature in the domestic hot water cylinder
is reached, the mode is automatically de­activated.

This mode is automatically deactivated at
most 24 hours after it was activated.

This mode temporarily suspends the set
time programming.

▶ Press the menu button.

▶ Turn the rotary knob until the BOOST

menu appears in the display.

▶ Press the rotary knob.
▶ Turn the rotary knob to activate the

BOOST mode.

▶ Press the rotary knob.
▶ Press the menu button to return to the

original display.

4.10 Setting limp home mode

This mode enables a limp home mode for
cases where use of the heat pump is pre­vented (air pipes not yet connected, dust­intensive work in the product's vicinity…).
In this mode, energy savings cannot be
achieved by using the heat pump. It should
therefore be used in exceptional circum­stances and for a limited time period only.

▶ Press the menu button.
▶ Turn the rotary knob until the ELEC.

MODE menu appears in the display.

▶ Press the rotary knob.
▶ Turn the rotary knob to activate the limp

home mode.

▶ Press the rotary knob.
▶ Press the menu button to return to the

original display.

4.11 Activating the anti-legionella
function

The product has an anti-legionella func­tion. In doing so, the water in the domestic
hot water cylinder to a temperature
between 60 °C and 70 °C.

Consult your competent person to activate
or deactivate the anti-legionella function.

4.12 Frost protection function

Note

The product is protected by the
frost protection function. The hot
and cold water circuit is not protec­ted by the product.

5 Troubleshooting

14 Operating instructions aroSTOR 0020285064_00

5 Troubleshooting

5.1 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.

Troubleshooting (→ Page 16)

▶ Ensure that the product generally works

without any problems and that no fault
messages or alarms are displayed.

▶ If the product still does not function after

the fault has been rectified, contact your
competent person.

6 Maintenance and care

6.1 Maintenance

An annual inspection and maintenance
of the product carried out by a compet­ent person is a prerequisite for ensuring
that the product is permanently ready and
safe for operation, reliable, and has a long
working life.

6.2 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.

6.3 Checking the condensate
discharge pipe and tundish

The condensate discharge pipe and tun­dish must always be penetrable.

▶ Regularly check the condensate dis-

charge pipe and tundish for faults and,
particularly, for blockages.

You must not be able to see or feel any
obstructions in the condensate discharge
pipe and tundish.

▶ If you notice a fault, have it eliminated

by a competent person.

7 Decommissioning

7.1 Temporarily decommissioning
the product

▶ If, during long periods of absence, the

power supply to the dwelling and to the
product is interrupted, have the product
drained by your competent person or
have it sufficiently protected against
frost.

7.2 Permanently decommissioning
the product

▶

Have a competent person permanently
decommission the product.

8 Recycling and disposal

▶ The competent person who installed

your product is responsible for the dis­posal 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 elec­tronic equipment.

If the product contains batteries that
are labelled with this mark, these batteries
may contain substances that are hazard­ous to human health and the environment.

▶ In this case, dispose of the batteries at

a collection point for batteries.

Guarantee and customer service 9

0020285064_00 aroSTOR Operating instructions 15

8.1 Arranging disposal of
refrigerant

The product contains R 290 refrigerant.

▶ Refrigerant must only be disposed of by

qualified competent persons.

▶ Observe the general safety information.

9 Guarantee and customer

service

9.1 Guarantee

Validity: Great Britain, Vaillant

Vaillant provides a full parts and labour
guarantee for this appliance for the dura­tion 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 installa­tion. 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 Execut­ive 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 compet­ent person to the prevailing building regu­lations 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 installa­tion 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 guar­antee, details of which can be found on the
registration card included with this appli­ance. In order to qualify for guarantee after
one year the appliance must be serviced
in accordance with our installation manual
servicing instructions. The benchmark ser­vice history should be completed. Note ­all costs associated with this service are
excluded from this guarantee.

Failure to install and commission this ap­pliance in compliance with the manufac­turer’s instructions will invalidate the guar­antee (this does not affect the customer’s
statutory rights).

Appendix

16 Operating instructions aroSTOR 0020285064_00

Appendix
A Troubleshooting

Fault Cause Solution

The product no longer
works.

The power supply is interrupted. 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 re­established, the product
automatically starts up.
If a fault is still present,
contact your competent
person.

The set target temperature of the water
is reached.

Check the domestic hot
water temperature.

The product is switched off. Check whether the

product is switched on
and the green LED is lit
up.

The product is in holiday mode. Switch off holiday mode.

The air inlet temperature is below -7 °C
or above +35 °C.

Ensure that the domestic
hot water cylinder is
heated using the back­up energy sources (im­mersion heater). If the
air inlet temperature is
once again between -7 °C
or and +35 °C, the heat
pump restarts.

Time programming conflicts with the
high-tariff load relief.

Check the time program­ming.

A programmed operating time is pre­venting operation (ECO symbol is lit
up).

Check the set operating
times.

There is a hot water
shortage.

The domestic hot water volume, which
was used within a short space of time,
is larger than the volumetric capacity of
the domestic hot water cylinder.

Wait until the domestic
hot water cylinder is sup­plied with sufficient hot
water again.

The programmed operating time for
the heat pump is too short (at least 12
hours in a 24 hour period).

Set the operating time
so that the domestic hot
water cylinder is charged
for at least 12 hours in a
24 hour period.

The setting for the set target temperat­ure is too low

Increase the set target
temperature.

Time programming conflicts with the
high-tariff load relief.

Check the time program­ming.

Appendix

0020285064_00 aroSTOR Operating instructions 17

Fault Cause Solution

The condensate does not
drain off (water under­neath the product).

The condensate discharge hose is
partly or completely blocked

Check the condensate
discharge hose.

There is a kink in the condensate
discharge hose and this is forming a
trough.

The condensate discharge hose is not
installed.

Consult your competent
person.

The electric back-up
heater is not working.

The ESC contact or a programmed
operating time is preventing operation
(ECO symbol is lit up).

Check the time program­ming and consult your
competent person.

The safety cut-out for the electric back­up heater has been tripped as a result
of overheating (> 87 °C).

Consult your competent
person.

Other faults Consult your competent

person.

B Optimising energy consumption

B.1 Using a low tariff and a control cable connection

Settings made by the end user

Setting/function Particularly econom-

ical

Average For increased com-

fort

Target temperature 45 °C 55 °C 65 °C

Time programming None None None

Holiday mode For absences of

more than 24 hours

For absences of
more than 3 days

For absences of
over a week

Boost mode Never Occasionally Often

Settings made by the competent person

Setting/function Particularly econom-

ical

Average Particularly expens-

ive

Anti-legionella cycle No 7 (weekly) 1 (daily – not re-

quired)

Minimum temperature No 43 °C 43 °C

MAX. TIME function No Auto 4 hours

Load relief level for high­tariff periods (HT)

0 (Operation of the
immersion heater
and the heat pump
prevented during
high-tariff periods)

1 (Operation of the
immersion heater
prevented during
high-tariff periods)

2 (Deactivation of
the load relief cir­cuit)

*) Exception: The air temperature lies outside the range between -7 °C and +35 °C. In this case,
operation of the back-up heater is permitted.

Appendix

18 Operating instructions aroSTOR 0020285064_00

Overview of the operating
mode

– LT: Heat pump

and immersion
heater (where
applicable) heat
the domestic hot
water cylinder

– HT: The product

runs in frost pro­tection mode (at
least +5 °C)

– LT: Heat pump

and immersion
heater (where
applicable) heat
the domestic hot
water cylinder

– HT: Only the heat

pump heats the
domestic hot
water cylinder
*

Heat pump and
immersion heater
heat the domestic
hot water cylinder
without any time re­striction.

*) Exception: The air temperature lies outside the range between -7 °C and +35 °C. In this case,
operation of the back-up heater is permitted.

B.2 Using a low tariff without a control cable connection

Settings made by the end user

Setting/function Particularly econom-

ical

Average For increased com-

fort

Target temperature 45 °C 55 °C 65 °C
Time programming Low tariff (LT) →

ECO
High tariff (HT) →
Frost protection

Low tariff (LT) →
Comfort
High tariff (HT) up to
12:00 → ECO
High tariff (HT) after
12:00 → Frost pro­tection

Low tariff (LT) →
Comfort
High tariff (HT) up to
12:00 → Comfort
High tariff (HT) after
12:00 → ECO

Holiday mode For absences of

more than 24 hours

For absences of
more than 3 days

For absences of
over a week

Boost mode Never Occasionally Often

Settings made by the competent person

Setting/function Particularly econom-

ical

Average Particularly expens-

ive

Anti-legionella cycle No 7 (weekly) 1 (daily – not re-

quired)

Minimum temperature No 43 °C 43 °C

MAX. TIME function No 6 hours 4 hours

Load relief level for high­tariff periods (HT)

Invalid (factory set­ting to 1)

Invalid (factory set­ting to 1)

Invalid (factory set­ting to 1)

*) Exception: The air temperature lies outside the range between -7 °C and +35 °C. In this case,
operation of the back-up heater is permitted.

Appendix

0020285064_00 aroSTOR Operating instructions 19

Overview of the operating
mode

– LT: Only the heat

pump heats the
domestic hot
water cylinder
*

– HT: The product

runs in frost pro­tection mode (at
least +5 °C)

– LT: Heat pump

and immersion
heater heat the
domestic hot
water cylinder

– HT up to 12:00:

The heat pump
supplements the
heating of the
domestic hot
water cylinder

– HT after 12:00:

The product runs
in frost protection
mode (at least
+5 °C)

– LT + HT up to

12:00: Heat
pump and immer­sion heater heat
the domestic hot
water cylinder

– HT after 12:00:

Only the heat
pump heats the
domestic hot
water cylinder
*

*) Exception: The air temperature lies outside the range between -7 °C and +35 °C. In this case,
operation of the back-up heater is permitted.

B.3 Operating with a fixed electricity tariff

Settings made by the end user

Setting/function Particularly econom-

ical

Average For increased com-

fort

Target temperature 45 °C 55 °C 65 °C

Time programming From 23:00 to

11:00: Frost
protection
From 11:00 to
23:00: ECO

No programming From 23:00 to

11:00: ECO
From 11:00 to
23:00: No program­ming

Holiday mode For absences of

more than 24 hours

For absences of
more than 3 days

For absences of
over a week

Boost mode Never Occasionally Often

Settings made by the competent person

Setting/function Particularly econom-

ical

Average Particularly expens-

ive

Anti-legionella cycle No 7 (weekly) 1 (daily – not re-

quired)

Minimum temperature No 43 °C 43 °C

MAX. TIME function No 6 hours 4 hours

Load relief level for high­tariff periods (HT)

Invalid (factory set­ting to 1)

Invalid (factory set­ting to 1)

Invalid (factory set­ting to 1)

*) Exception: The air temperature lies outside the range between -7 °C and +35 °C. In this case,
operation of the back-up heater is permitted.

Appendix

20 Operating instructions aroSTOR 0020285064_00

Overview of the operating
mode

– From 23:00

to 11:00: The
product runs in
frost protection
mode (at least
+5 °C)

– From 11:00 to

23:00: The heat
pump heats the
domestic hot
water cylinder
with improved
efficiency *

The heat pump
heats the domestic
hot water cylinder *.

– From 23:00 to

11:00: The heat
pump heats the
domestic hot
water cylinder
*

– From 11:00 to

23:00: The heat
pump heats the
domestic hot
water cylinder
with improved
efficiency. The
immersion heater
can be switched
on as required.

*) Exception: The air temperature lies outside the range between -7 °C and +35 °C. In this case,
operation of the back-up heater is permitted.

C End user level – overview

Validity: Vaillant

Setting level Values Unit Increment, select, explana-

tion

Default set­ting

Min. Max.

TEMP. SETT. →

TARG ET TARGET WA­TER TEMP.

30 to 65 ℃ ℃ 1 55

T°PV ECO TARG ET <

T°PV ECO <
T°PV MAX

℃ 1, if the photovoltaic installa-

tion is connected

60

T°PV MAX T°PV ECO <

65 °C

℃ 1, if the photovoltaic installa-

tion is connected

65

HOLI DAYS →

HOLI.RETUR. 0 99 Days 1 0

ELEC. MODE (VWL B 290/4) →

ELEC. MODE Yes, No No

BOIL. MODE (VWL BM 290/4) →

BOIL. MODE Yes, No No

BOOST →

BOOST Yes, No No

BA CK UP →

Appendix

0020285064_00 aroSTOR Operating instructions 21

Setting level Values Unit Increment, select, explana-

tion

Default set­ting

Min. Max.

BA CK UP ELEC.BACKP, BOIL.BACKP

ELEC.BACKP

LAN GUAGE →

LAN GUAGE 16 available languages EnG

INST.MENU →

0020285064_00 28.02.2019

Supplier

Vaillant Ltd.

Nottingham Road Belper 1 1 Derbyshire 1 1 DE56 1JT
Telephone [phone]
[e-mail] 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.

Subject to technical modifications.

0020285064_00