Vaillant VIH S GB 210/2 S User manual

Instructions for commissioning, maintenance
and troubleshooting
For the competent person
GB, IE
Instructions for commissioning, maintenance and troubleshooting
Solar heating system
with auroSTOR
Solar hot water system

Table of contents
2Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
Table of contents
1 Notes on the documentation ................................3
1.1 Other applicable documents ................................... 3
1.2 Storing documents.....................................................3
1.3 Symbols used...............................................................3
1.4 Applicability of the instructions..............................3
1.5 Cylinder identification plate.....................................4
1.6 CE label .........................................................................4
1.7 Benchmark ...................................................................4
2 Safety instructions and regulations ..................4
2.1 Safety and warning information .............................4
2.1.1 Classification of action-related warnings .............4
2.1.2 Structure of warnings................................................4
2.2 Intended use ................................................................5
2.3 General safety instructions......................................5
2.4 Overview of EU standards........................................6
2.4.1 General information on solar heating system.....6
2.4.2 Cylinder and cylinder assembly ..............................7
2.5 Regulations for Great Britain................................... 7
2.5.1 Technical Guidance.....................................................7
2.5.2 Related documents..................................................... 7
2.5.3 Regulations for the prevention of accidents .......8
3 System description ..................................................8
3.1 Design and function of solar heating system......8
3.2 Electrical wiring......................................................... 10
3.3 Hot water temperature regulation ....................... 10
3.4 Heating control.......................................................... 10
4 Description of the components............................11
4.1 auroSTOR solar cylinder...........................................11
4.1.1 Safety devices.............................................................12
4.1.2 Cylinder operating elements...................................12
4.2 Solar fluid ....................................................................14
4.2.1 Properties of solar fluid...........................................14
4.2.2 Solar circuit frost and corrosion protection
system ..........................................................................14
4.2.3 Cylinder frost protection..........................................14
4.2.4 Safety data sheet for Vaillant solar fluid.............15
4.3 System configuration................................................17
4.3.1 Vaillant controllers and their basic functions.....17
4.3.2 Control functions .......................................................18
4.3.3 Technical data of the auroSTOR solar cylinder 20
4.3.4 Dimensions.................................................................22
5 Assembly ...................................................................23
5.1 Scope of delivery ......................................................23
5.2 Transporting the cylinder.......................................23
5.3 Requirements for installation site ........................23
6 Installation................................................................24
6.1 Installation sequence...............................................24
6.2 Installation of solar circuit piping.........................24
6.2.1 Piping material in the solar circuit.......................24
6.2.2 Layout of piping in the solar circuit.....................24
6.2.3 Realisation of solar circuit piping.........................25
6.2.4 Venting the solar circuit..........................................27
6.3 Pipes for the primary heating circuit ..................29
6.4 Installing hot water pipes .......................................29
6.5 Hot water thermostat mixer ..................................29
6.5.1 Installing the hot water thermostat mixer
(without secondary circulation line) ................... 30
6.5.2 Installing the hot water thermostat mixer
(with secondary circulation line).......................... 30
6.5.3 Setting the hot water thermostat mixer............ 30
6.6 Installation of cold mains inlet ...............................31
6.6.1 Pressure in cold mains inlet....................................31
6.6.2 Mounting the safety assembly ...............................31
6.6.3 Mounting the expansion vessel.............................32
6.6.4 Mounting the drain valve........................................32
6.6.5 Laying the pipes to the tundish ............................32
6.7 Installation of discharge pipe ................................32
6.7.1 Design of discharge pipe.........................................32
6.7.2 High drain ...................................................................34
6.8 Electrical installation ...............................................34
6.8.1 Options for combining control components ......34
6.8.2 Electrical connection of control components....36
6.8.3 Connecting up the electric immersion heater...37
6.8.4 Connection of the solar pump...............................38
6.8.5 Connecting up the solar yield temperature
sensor..........................................................................38
6.8.6 Installing the control components in accordance
with the connection wiring diagrams.......................40
7 Commissioning.........................................................52
7.1 Checking leak-tightness ..........................................52
7.2 Flushing the solar circuit with solar fluid...........53
7.3 Filling the solar circuit with solar fluid................53
7.4 Setting the flow rate in the solar circuit............ 54
7.5 Flushing the primary heating circuit ...................55
7.6 Water treatment........................................................55
7.7 Filling the cylinder................................................... 56
7.8 Filling the central heating system ........................57
7.9 Commissioning the gas-fired wall-hung boiler 58
7.10 Setting the hot water thermostat mixer............ 58
7.11 Filling in the commissioning report .................... 58
7.12 Handover to the operator...................................... 58

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 3
1 Notes on the documentation
The following instructions are intended to guide you
through the entire documentation.
Other documents apply in addition to these installation
instructions.
We do not accept liability for any claims or damages
resulting from failure to observe these instructions.
1.1 Other applicable documents
>When installing and maintaining the solar heating system,
you must observe all of the installation and maintenance
instructions for system components as well as those for
other accessories which are used in the system.
These installation and maintenance instructions are pro-
vided with the relevant system components and accesso-
ries.
1.2 Storing documents
>Pass these installation instructions and all other appli-
cable documents and, if necessary, any required tools to
the system operator.
The system operator will store these so that they are
available when required.
1.3 Symbols used
The symbols used in the text are explained below.
iSymbol that denotes useful tips and
information
>Symbol for a required action
1.4 Applicability of the instructions
These instructions apply for the following only:
Unit type Cylinder volume Article number
VIH S GB 210/2 S 210 litres 0020115422
VIH S GB 260/2 S 260 litres 0020115425
VIH S GB 310/2 S 310 litres 0020115428
Table 1.1 Applicability of the instructions
>The article number of the unit is displayed
on the identification plate.
Notes on the documentation 1
8 Inspection and maintenance...............................59
8.1 Checking the temperature/pressure
relief valve and expansion relief valve.................61
8.2 Checking the charge pressure
of the expansion vessel............................................61
8.3 Draining the cylinder ................................................61
9 Fault finding..............................................................62
10 Taking the cylinder out of service ................... 65
10.1 Temporarily taking the cylinder out of service 65
10.2 Permanently taking the cylinder
out of service............................................................ 65
11 Recycling and disposal......................................... 65
11.1 Cylinder disposal...................................................... 65
11.2 Disposal of packaging............................................. 65
12 Customer service and manufacturer's
guarantee.................................................................. 66
12.1 Vaillant service......................................................... 66
12.2 Vaillant guarantee ................................................... 66

4Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
1.5 Cylinder identification plate
The identification plate is attached to the cylinder
at the factory.
1.6 CE label
CE labelling shows that, based on the type overview, the
units comply with the basic requirements of the applica-
ble directives.
The CE declarations of conformity can be viewed at the
manufacturer's premises and can be supplied if neces-
sary.
1.7 Benchmark
iVaillant Ltd. supports the Benchmark Initia-
tive. You will find the Benchmark Logbook on
the last page of this instruction manual. It is
very important that this document be filled
out properly when installing, commissioning
and handing-over to the operator of the
installation. Installers should point out also
the service record section for completion fol-
lowing service calls to this appliance.
Benchmark places responsibilities on both
manufacturers and installers. The purpose is
to ensure that customers are provided with
the correct equipment for their needs, that it
is installed, commissioned and serviced in
accordance with the manufacturer’s instruc-
tions by competent persons approved at the
time by the Health and Safety Executive and
that it meets the requirements of the appro-
priate Building Regulations.
The Benchmark Checklist can be used to dem-
onstrate compliance with Building Regulations
and should be provided to the customer for
future reference.
Installers are required to carry out installa-
tion, commissioning and servicing work in
accordance with the Benchmark Code of Prac-
tice which is available from the Heating and
Hot water Industry Council who manage and
promote the Scheme.
Visit "www.central heating.co.uk" for more
information.
2 Safety instructions and regulations
2.1 Safety and warning information
When conducting installation and maintenance work,
observe the general safety instructions and the warning
notes which appear before each of the actions.
2.1.1 Classification of action-related warnings
The action-related warnings are classified in accordance
with the severity of the possible danger using the follow-
ing warning signs and signal words:
Warning sign Signal word Explanation
aDanger! Imminent danger to life or
risk of severe personal injury
eDanger! Risk of death from
electric shock
aWarning! Risk of minor
personal injury
bCaution! Risk of material or
environmental damage
2.1.2 Structure of warnings
Warning signs are identified by an upper and lower sepa-
rating line and are laid out according to the following
basic principle:
aSignal word!
Type and source of danger!
Explanation of the type and source of dan-
ger.
>Measures for averting the danger
1 Notes on the documentation
2 Safety instructions and regulations

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 5
2.2 Intended use
The Vaillant solar heating system has been constructed
using state-of-the-art technology in accordance with rec-
ognised safety regulations.
Nevertheless, there is still a risk of injury or danger of
death to the operator or others or of damage to the unit
and other property in the event of improper use or use
for which the unit is not intended.
These components of the Vaillant solar heating system
are not intended to be used by persons (including chil-
dren) with limited physical, sensory or mental capabili-
ties or insufficient experience and/or knowledge, unless
they are supervised by a person who is responsible for
their safety or have been instructed by this person on
how to use the unit.
Children must be supervised to ensure that they do not
play with the unit.
The purpose of the Vaillant solar heating system is to
provide a solar-supported hot water supply.
Vaillant auroSTOR VIH S GB 210/2 S, VIH S GB 260/2 S,
and VIH S GB 310/2 S solar cylinders are unvented, indi-
rectly heated domestic hot water cylinders for solar
heating systems designed for use with gas-fired wall-
hung boilers as per GB standards for hot water supply
systems. The cylinders work with the pressure of the
water supply line and do not need a cold water tank for
their supply.
They are used only to supply potable water heated up to
80ºC by means of a solar collector array. They may only
be used for this purpose. The cylinders can be used in
combination with a downstream gas-fired wall-hung
boiler for hot water production in accordance with
GB standards.
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.
The manufacturer/supplier is not liable for any claims or
damage resulting from improper use. The user alone
bears the risk.
Intended use includes the following:
– observance of accompanying operating, installation and
servicing instructions for Vaillant products as well as for
other parts and components of the system.
– compliance with all inspection and maintenance condi-
tions listed in the instructions.
Improper use of any kind is prohibited!
At the end of these instructions there is a commission-
ing report which you must fill in and hand over to the
operator.
All installers should have a current ID card and registra-
tion number. The cylinder must be installed by a compe-
tent person approved at the time by the Health and
Safety Executive to the prevailing standards, installation
book and building regulations at the time of installation.
2.3 General safety instructions
Installation, commissioning, and maintenance
Installation and adjustment as well as service, mainte-
nance and repair must be carried out by a competent
person approved at the time by the Health and Safety
Executive and be in accordance with the relevant
requirements of the Local Authority, Building Regula-
tions, Building Regulations (Scotland), Building Regula-
tions (Northern Ireland), and the bye-laws of the local
Water Undertaking.
All electrical wiring must be carried out by a competent
electrician and be in accordance with the current I.E.E.
Wiring Regulations.
>Make sure that the system has been planned in
accordance with technical regulations and all applicable
planning standards.
Risk of death due to lack of safety devices
A lack of safety devices (e.g. expansion relief valve,
expansion vessel) can lead to potentially fatal scalding
and other injuries, e.g. due to explosions.
The schematic drawings included in this document do
not show all safety devices required for correct installa-
tion.
>Install the necessary safety devices in the system.
>Inform the operator about the function and position of
the safety devices.
>Observe the applicable national and international laws,
standards and guidelines.
Safety information on the solar heating system
>Mount and operate the entire solar heating system in
accordance with the recognised technical regulations.
>Make sure that all valid health and safety regulations are
observed, especially for work on the roof. Always use fall
protection devices if there is a risk of falling. We recom-
mend the use of a Vaillant safety belt. Observe the acci-
dent prevention regulations of the professional associa-
tions.
>Earth the solar circuit for potential equalisation and to
protect against overvoltage. Attach earthing pipe clamps
to the solar circuit pipes and connect the clamps to a
potential equalisation bar using 16 mm2Cu cable.
Safety instructions and regulations 2

6Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
Cylinder safety information
Following an inspection, it was ascertained that this
product complies with the building regulations for closed
hot water cylinder systems and must not be changed or
rebuilt in any way.
>When replacing parts, only original replacement parts
from Vaillant Ltd. may be used.
The installation must be approved in accordance with
the building regulations.
>Installation plans must be disclosed to the relevant
authorities.
Important:
As stipulated in the manual "Handling Operations Regu-
lations 1992", the weight of the unit exceeds that which
should be lifted by one person alone.
Electric potential equalisation
If you use an electric immersion heater in the cylinder,
the external voltage may build up electrical potential in
the water which can result in the electrochemical corro-
sion of the electric immersion heater.
If the solar cylinder is connected with pipes made of
non-metallic materials and is not earthed, corrosion
damage can occur.
>Make sure that both the hot water and cold mains inlets
are connected to the earth line by means of
an earth cable directly on the cylinder.
>You must also make sure that the electric immersion
heater is connected to the earth line via the earthing ter-
minal.
Risk of scalding and damage from escaping hot or cold
water.
>If you use plastic pipes for the hot or cold water connec-
tion of the unit, you must only use pipes which are tem-
perature-resistant up to 95 °C under a pressure of 1.0
MPa (10 bar).
Improper use and/or the use of unsuitable tools may
result in damage (e.g. water leaks).
>Always use a suitable open-end wrench (spanner) to tigh-
ten or undo threaded connections. Do not use pipe wren-
ches, extensions, etc.
If the water does not satisfy the standards for water
quality in the UK with a maximum chloride content of
250 mg/l, this may result in corrosion damage to the
cylinder.
>Only use the cylinder to heat potable water.
Avoiding burns and scalds
>Install and replace collectors or collector parts on very
cloudy days. Only carry out installation work
in the early morning or in the evening on sunny days or
cover the collector.
>Fill and flush the solar heating system when the collec-
tors are cold. Cover the collectors while doing so.
If the solar heating system is in stagnation, hot steam
can escape from the expansion relief valve of the solar
pump unit, causing injury to persons. Escaping solar
fluid is visible in the collection canister.
>Connect the expansion relief valve to a collecting
container via a metal pipe.
>Position an air vent or an air separator system in such a
way that persons are not endangered by escaping steam.
>Install a hot water thermostat mixer in the system
to protect against scalding.
Preventing frost damage
You should not turn the gas-fired wall-hung boiler off
completely so that you can still use all of the safety
functions for your heating system. If you want to take
the unit out of operation for a relatively long period of
time in an unheated room at risk from frost, you must
completely drain the auroSTOR.
Avoiding damage caused by leaks
If there are leaks in the pipework, close off the cold
water stop valve on the safety assembly and notify a
competent person so that they can rectify the leaks.
Preventing damage due to unauthorised changes
to the unit
Changes to the supply lines, relief valve termination,
and expansion relief valve may only be carried out by
a competent person!
2.4 Overview of EU standards
2.4.1 General information on solar heating system
EN ISO 9488
Solar heating system and components, terminology
(ISO/DIS 9488; 1995)
EN 12975-1
Solar heating systems and components; Collectors,
Part 1: General requirements
EN 12975-2
Solar heating systems and components; Collectors;
Part 2: Testing methods
EN 1991-2-3
Eurocode 1 – Basis of design and actions on structures,
Part 2–3: Actions on structures - Snow loads
EN 12976-1
Solar heating systems and components;
Factory made systems - Part 1: General requirements
EN 12976-2
Solar heating systems and components;
Factory made systems - Part 2: Testing methods
2 Safety instructions and regulations

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 7
ENV 12977-1
Solar heating systems and components;
Custom built systems,
Part 1: General requirements
ENV 12977-2
Solar heating systems and components;
Factory made systems,
Part 2: Testing methods
ISO 9459-1: 1993
Solar heating – Domestic water heating systems – Part 1:
System rating procedures using indoor test methods
ISO/TR 10217
Solar energy; Water heating system; Guideline for mate-
rial selection with reference to internal corrosion
2.4.2 Cylinder and cylinder assembly
Pressure equipment directive 97/23/EC
Directive of the European Parliament and Council
of 29th May 1997 for the approximation of the laws
on pressure equipment of the Member States
EN 12977-3
Solar heating systems and components;
Custom built systems,
Part 3: Performance characterisation of domestic
hot water cylinders
EN 12897:2006
Water supply - specification for indirectly heated
unvented (closed) domestic hot water cylinders
EN 806-1
Specifications for installations inside buildings conveying
water for human consumption - Part 1: General
EN 1717
Protection against pollution of potable water installa-
tions and general requirements of devices to prevent
pollution by backflow
EN 60335-2-21
Safety of household and similar electrical appliances;
Part 2: Particular requirements for storage water heat-
ers (domestic hot water cylinders and hot water boilers)
(IEC 335-2-21: 1989 and supplements 1; 1990 and 2; 1990,
modified)
Lightning protection
ENV 61024-1
Protection of structures against lightning – Part 1:
General principles (IEC 1024-1: 1990; modified)
BS 6651: Code of practice for protection of structures
against lightning
2.5 Regulations for Great Britain
2.5.1 Technical Guidance
The system must be installed in accordance with all rele-
vant and applicable national regulations, and must be
installed to suit site conditions.
Observe all national regulations, including:
– Working at Heights Regulations 2005
– Health and Safety at Work Act 1974
– Electricity at Work Regulations 1989
– IEE Wiring Regulations BS 7671
– Lightning protection requirements
– Equipotential bonding of electrical installations.
2.5.2 Related documents
The installation of the solar system must be in accord-
ance with the relevant requirements of Health and
Safety Document No. 635 (The Electricity at Work Regu-
lations 1989), BS7671 (IEE Wiring Regulations) and the
Water Supply (Water Fitting) Regulations 1999, or The
Water Bylaws 2000 (Scotland). It should also be in
accordance with the relevant requirements of the Local
Authority, Building Regulations, The Building Regulations
(Scotland), The Building Regulations (Northern Ireland)
and the relevant recommendations of the following
British Standards:
BS EN 806: Specification for installations inside build-
ings conveying water for human consumption
BS 6700: Services supplying water for domestic use
within buildings and their curtilages.
BS. 5449 Forced circulation hot water central heating
systems for domestic premises. Note: only up to 45 kW.
BS. 6880 Low temperature hot water heating systems
of output greater than 45 kW.
Part 1 Fundamental and design considerations.
Part 2 Selection of equipment.
Part 3 Installation, commissioning and maintenance.
BS 6114: Expansion vessels using an internal diaphragm
for unvented hot water supply systems
BS. 4814 Specification for: Expansion vessels using an
internal diaphragm, for sealed hot water heating sys-
tems.
Unvented hot water systems must comply with building
regulation G section 3.
Safety instructions and regulations 2

8Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
2.5.3 Regulations for the prevention of accidents
When carrying out works such as solar installation work
it is necessary to do so in a safe and workman like man-
ner, taking due care of any aspects of the works that
could result in injuries to person in or about the building
as well as workers, passers by and the general public at
large. To that end these works must conform, but not be
limited to, the current regulations in force such as the
following
Health and Safety at Work act 1974
Work at Height Regulations 2005.
Electricity at Work Regulations 1989
All necessary Building Regulations.
Work should be preceded by a risk assessment covering
all aspects of health and safety risks, or training require-
ments that can reasonably be foreseen to be
associated with the work. All scaffolding in the UK, other
than prefabricated (zip-up) scaffold towers, must be
designed and constructed by a vetted contractor, and
have suitable kick boards, hand rails and where appro-
priate netting. Areas around the scaffolding should be
zoned off and marked with suitable warning signs to a
suitable distance to protect persons from falling objects.
Workers should have available and use personal protec-
tive equipment as necessary. This would include equip-
ment such as fall protection systems, safety gloves,
goggles, dust masks as well as any specialised equip-
ment that may be in use such as lifting and handling
equipment.
The completed works shall comply with all necessary
BS EN Standards and Codes of practice as well as Build-
ing control or planning requirements and be confirmed
where necessary by notification to building control or
the appropriate competence based notification body.
3 System description
3.1 Design and function of solar heating system
The solar heating system consists of four main compo-
nents:
– The collectors, which absorb the solar radiation and
make it useful
– The solar controller, which monitors, displays, and cont-
rols all system functions
– The solar pump unit, which is responsible for trans-
porting the solar heat
– The solar cylinder
The Vaillant solar heating system is a closed hydraulic
system in which heat is transferred to the cylinder via
the heat exchanger with the help of the system's special
heat transfer fluid.
On days when the solar radiation is not sufficient to heat
the hot water in the cylinder, the cylinder water must be
reheated using a heating system. This can take place
using a gas-fired wall-hung boiler or an electric immer-
sion heater.
2 Safety instructions and regulations
3 System description

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 9
6
7
9
2
C
D
411
3
10
1
BA
5
5
12
M
DHW
M
M
8
Fig. 3.1 System for solar hot water production
Key
1 Gas-fired wall-hung boiler
2 Cylinder
3 Two port motorised valve (230 V, supplied with cylinder)
4 Electric immersion heater
5 Two port motorised valve (230 V)
6 Collector (tube collector with top connections (example) or flat
collector with top and bottom connections)
7 Solar pump unit
8 Solar protection and expansion vessel (Combined unit)
9 Collection canister for solar fluid
10 Automatic air separator system
11 Hot water expansion vessel
12 Thermostat mixer
A Primary heater flow
B Primary heater return
C Solar flow
D Solar return
DHW Hot water
System description 3

10 Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
iThe collection canister for solar fluid collects
escaping solar fluid. The solar fluid must not
reach the drainage system.
iFor the supply and return lines in the solar cir-
cuit, use insulated stainless steel pipes, e.g. the
Vaillant Solar flexible pipe that is included in the
scope of delivery of a Vaillant Solar set. Alterna-
tively, you can also use copper pipes with press
fittings and suitable insulation. Soft solder con-
nections are not suitable for solar piping.
iIf a cylinder is fitted very high up in the building,
negative pressure may form in the cylinder.
Under such circumstances, the competent per-
son must decide whether an anti-vacuum valve
is required in order to prevent damage to the
cylinder. If, as a result of draining or thermal
contraction of the drinking water, the negative
pressure in the cylinder is too high, an anti-vac-
uum valve ensures pressure compensation as a
result of air flowing into the cylinder.
The collector(6) converts solar energy into heat and
transfers the heat energy to a frost-protected solar fluid.
Using the pipe system, the solar pump of the solar pump
unit (7) conveys the heat from the collector to the biva-
lent cylinder (2). The solar pump unit is controlled by
the solar controller.
The solar controller switches the solar pump on and off
as soon as the temperature difference between the col-
lector and cylinder exceeds or falls below the preset
value. If the solar energy is not sufficient for require-
ments, the controller activates the gas-fired wall-hung
boiler (1) to reheat the top third of the cylinder to the
set hot water temperature value. The water in the cylin-
der can also be reheated using the electric immersion
heater installed at the factory.
A solar expansion vessel compensates for pressure
fluctuations in the solar circuit.
A solar protection vessel protects the expansion vessel
from excessive temperatures in the solar circuit. We rec-
ommend installing a protection vessel.
All Vaillant solar sets contain a combined solar protec-
tion and solar expansion vessel (8).
3.2 Electrical wiring
If you use an eBUS-compatible Vaillant gas-fired wall-
hung boiler, you can use a Vaillant Control Centre for the
wiring.
If you are using a non-eBUS-compatible Vaillant gas-
fired wall-hung boiler or a third-party boiler, you can
use a standard cabling box.
Section 6.8 of these instructions describes the electrical
wiring of the system in detail.
3.3 Hot water temperature regulation
You can control the hot water temperature in the top
third of the cylinder using an auroMATIC VRS 560/2 or a
calorMATIC VRC470 with VR68/2 and VR61/2 or with a
separate hot water controller.
aDanger!
Risk of burns and scalds!
Water at a temperature of more than 60ºC
could be delivered to the hot water draw-off
points.
>Install a hot water thermostat mixer in
the hot water pipe to provide effective
scald protection.
>Set the hot water thermostat mixer to
less than 60ºC and check the tempera-
ture at
a hot water draw-off point.
3.4 Heating control
If you are using an eBUS-compatible Vaillant gas-fired
wall-hung boiler, you can control the heating using a
programmable Vaillant VRT room thermostat or a VRC
weather compensator.
If you are using a non-eBUS-compatible Vaillant gas-
fired wall-hung boiler or a third-party boiler, you can use
a Vaillant VRT30 room thermostat or one of the room
thermostats commonly available on the market.
3 System description

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 11
4 Description of the components
4.1 auroSTOR solar cylinder
1
2
3
4
5
1
2 3
4
5
67
9
8
10
13
11
12
16
17
3
19
23
24
25
26
15
22
20
21
18
14
Fig. 4.1 auroSTOR solar cylinder function elements
Key
1 Hot water draw off
2 Expansion relief valve (6.0 bar)
3 Pressure reducing valve (3.5 bar) with line strainer
4 Cold water inlet
5 Pressure-controlled cold water inlet
6 Connection for hot water expansion vessel
7 Cylinder connection
8 Hot water expansion vessel
9 Tundish
10 Cylinder drain valve
11 Solar return
12 Solar yield temperature sensor (Ertrag)
13 Cold water inlet
14 Solar circuit thermal cut-out (TCO), set to 80ºC, to be con-
nected with the solar pump in order to isolate this heat source
if there is a fault in the solar control.
15 Solar circuit cylinder dry pocket (SP2)
16 Solar flow
17 2-pole isolating switch for electric immersion heater
18 Electric immersion heater with thermostat and thermal cut-out
19 Return (gas-fired wall-hung boiler)
20 Primary heating circuit cylinder dry pocket (SP1)
21 Primary heating circuit thermal cut-out, set to 80ºC, to be con-
nected to the two port motorised valve in order to isolate the
primary heat source if a fault occurs.
22 Cylinder thermostat (20°C to 65°C)
23 Two port motorised valve
24 Flow line (gas-fired wall-hung boiler)
25 Secondary return
26 Temperature and pressure relief valve (90°C, 7 bar)
Description of the components 4

12 Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
The auroSTOR solar cylinder is available in three sizes:
210, 260, and 310 litres. The cylinder is made from stain-
less steel and is insulated with EPS with heat radiation
absorbers. The cylinder is supplied along with all
required cold and hot water control devices and a two
port motorised valve.
The cylinder works with the pressure of the water supply
line and does not need a cold water tank for its supply.
The cylinder has hot and cold water inlets with a diame-
ter of 22 mm. To enable the cylinder to work as well as
possible, a cold water supply with a dynamic pressure
and flow rate that are appropriate for the system is
required (¬section 6.6.1).
4.1.1 Safety devices
The cylinder is delivered with all safety and control
devices for the operation of the unvented domestic
hot water supply system:
– Temperature and pressure relief valve (90°C, 7 bar)
– Pressure reducing valve (3.5 bar) with line strainer
– Expansion relief valve (one-way valve, 6.0 bar)
– Solar circuit thermal cut-out, set to 80ºC, to be connec-
ted with the solar pump in order to isolate this heat
source if there is a fault in the solar control.
– Thermal cut-out for electric immersion heater
– Primary heating circuit thermal cut-out, set to 80ºC, to
be connected to the two port motorised valve in order to
isolate the primary heat source if a cylinder thermostat
fault occurs.
The thermal cut-out and other safety devices must
always be used.
4.1.2 Cylinder operating elements
1
2
3
4
5
1
6
5
7
8
2
3
4
Fig. 4.2 Cylinder operating elements
Key
1 Cover cap for reset button for primary heating circuit TCO
2 Primary heating circuit temperature controller
3 Electric immersion heater cover
4 Cover cap for reset button for solar circuit TCO
5 Solar circuit thermal cut-out (TCO)
6 Electric immersion heater
7 Cylinder thermostat
8 Primary heating circuit thermal cut-out
The following are pre-mounted at the factory for the
auroSTOR solar cylinder:
– Cylinder thermostat (7) and primary heating circuit ther-
mal cut-out (8)
– Electric immersion heater(6) with thermal cut-out and
cylinder thermostat
– Solar circuit thermal cut-out (5)
The cylinder must be properly wired in order to comply
with G3 building regulations.
4 Description of the components

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 13
3
3
3
1
2
3
4
Fig. 4.3 Connection diagram for solar pump
Key
1 Solar controller or solar module
2 Terminal strip for series circuit to solar pump via TCO solar
circuit
3 Solar pump
4 Solar circuit thermal cut-out
iYou must connect the solar pump to the solar
controller via the solar circuit thermal cut-out
(5) (¬section 6.8). The thermostat switches the
solar pump off if the hot water temperature in
the cylinder exceeds 80ºC. Set the maximum
cylinder temperature (MAXT 1)
to 75°C (factory setting) on the auroMATIC
VRS 560 solar controller.
Electric immersion heater
1
2
3
4
5
1
2
3
Fig. 4.4 Electric immersion heater operating elements
Key
1 Electric immersion heater temperature controller
2 Electric immersion heater TCO reset button
3 Electric immersion heater
The cylinder is equipped with an additional electric
immersion heater (3) with a heating output of 3 kW. The
electric immersion heater is located behind the top front
cladding. The electric immersion heater is designed for
use in unvented cylinders and has a thermostat with a
temperature controller (1) and a thermal cut-out (TCO)
with a reset button (2).
iIf you need to make a replacement, you must
use the correct electric immersion heater with a
thermal cut-out for overheating protection. The
seal of the electric immersion heater must also
always be replaced. Use only original replace-
ment parts from VaillantLtd.
Setting the hot water temperature
You can set the hot water temperature by pointing the
arrow on the temperature controller (1) of the electric
immersion heater to a number between 1 and 5. The fol-
lowing table contains the approximate hot water temper-
ature for each of the five settings.
Setting Hot water temperature
1 20°C
2 35°C
3 45°C
4 60°C
5 68°C
Table 4.1 Setting the hot water temperature
Description of the components 4

14 Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
4.2 Solar fluid
4.2.1 Properties of solar fluid
This information applies to Vaillant solar fluid
(20l canister: article number 302498 and 10l canister:
article number 302363).
Vaillant solar fluid is a ready-mixed frost and
corrosion protection agent, consisting of approximately
45% propylene glycol with anti-corrosion inhibitors and
55% water.
Vaillant solar fluid is extremely temperature-resistant
and can be used in conjunction with Vaillant tube collec-
tors and Vaillant flat collectors.
The solar fluid also has a high heat capacity.
The inhibitors provide reliable corrosion protection when
different types of metal are used (mixed installations).
bCaution!
Risk of damaging the collectors and
other system parts if unsuitable solar
fluid is used.
If you mix the solar fluid with water or
another liquid, frost and corrosion protec-
tion cannot be ensured.
>Never mix the solar fluid with water
or another liquid.
iDo not use any other frost protection agents or
inhibitors for the Vaillant solar heating system.
Only Vaillant's solar fluid is permitted for use
with the system.
Vaillant solar fluid is infinitely durable in hermetically
sealed containers.
It is not dangerous if it comes into contact with the skin.
Eye contact only causes minor irritations, you should
nevertheless immediately wash your eyes.
Pay attention to the safety data sheet
(¬section 4.2.4).
4.2.2 Solar circuit frost and corrosion protection
system
In order to reliably protect the solar heating system
from frost in winter, you must fill the entire system with
undiluted Vaillant solar fluid.
iFilling the solar heating system with Vaillant
solar fluid provides frost protection up to
approx. -28 ºC.
Even at outside temperatures of lower than
-28ºC, frost damage does not occur straight
away since the explosive effect of the water is
distributed. Check the frost protection effect
after filling the system and then once every year.
We recommend the Vaillant refractometer for quick and
simple checking. A classic Vaillant frost protection tester
can be used for this.
See the enclosed operating instructions.
4.2.3 Cylinder frost protection
If you want to put a cylinder out of operation where it
may be at risk from frost, you must drain it completely.
It is drained at the cold water inlet with a T-piece with
tap to be provided by the installer.
Any heat exchangers not filled with solar fluid in rooms
which are at risk of frost must also be completely
drained.
4 Description of the components

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 15
4.2.4 Safety data sheet for Vaillant solar fluid
1) Name of substance/preparation and company
details:
1a) Trade name:
Vaillant ready-mixed solar fluid
1b) Use:
Heat transfer fluid for solar heating systems
1c) Company:
Vaillant GmbH
Berghauser Str. 40
42859 Remscheid, Germany
Tel. [phone], Fax [phone]
1d) Emergency information:
your local poison information centre
(see directory assistance or telephone directory).
2) Possible dangers:
2a) Special danger indications for people and the
environment: Not required!
3) Composition/information on ingredients:
3a) Chemical nature:
Aqueous solution of 1.2-propylene glycol
(CAS no.: 57-55-6) with corrosion inhibitors.
3b) Hazardous ingredients:
1,1’-iminodipropan-2-ol
content (w/w): > 1 % - < 3 %, CAS no.: 110-97-4
EC no.: 203-820-9, hazard symbol: Xi
INDEX no: 603-083-00-7, R phrases: 36
If hazardous ingredients are named, the wording for
the hazard symbols and R phrases will be
provided in Point 16.
4) First aid measures:
4a) General information:
Remove dirty clothes.
4b) After inhalation:
Discomfort after inhaling fumes/aerosol:
fresh air, help from a doctor.
4c) After skin contact:
Wash off with water and soap.
4d) After contact with the eyes:
Thoroughly rinse out with running water
for at least 15 minutes with the eyes open.
4e) After swallowing:
Rinse mouth and drink lots of water.
4f) Information for the doctor:
Treatment of symptoms (decontamination,
vital function), no specific antidote known.
5) Firefighting measures:
5a) The product is not flammable. Surrounding fire can be
combated with sprayed water, dry extinguishers, alco-
hol-resistant foam, and carbon dioxide (CO2).
5b) Special dangers: Fumes which are detrimental to
health. Formation of smoke/mist. The specified subs-
tances/substance groups may be released in the event
of a fire.
5c) Special protection equipment: Wear a breathing appa-
ratus which is independent of the circulating air in the
event of a fire.
5d) Further information: The dangers depend on the bur-
ning substances and the fire conditions. Polluted fire
water must be disposed of according
to local official regulations.
6) Measures in the case of accidental release:
6a) Precautions to protect persons:
No particular measures required.
6b) Measures to protect the environment:
Contaminated water/fire water must be withheld.
It must not be discharged into bodies of water without
being pre-treated first (in a biological waste water
treatment plant).
6c) Cleaning/collection procedure:
Contain any escaped material and cover with large
quantities of sand, soil, or another absorbing material;
then sweep enthusiastically to promote absorption.
Fill the mixture into containers or plastic bags and
take away for disposal.
Wash away small amounts (splashes) with large quan-
tities of water. For large quantities, pump out the pro-
duct, collect it up and take it away for disposal. If lar-
ger quantities may have entered the drainage system
or water bodies, contact the responsible water autho-
rities.
7) Handling and storage:
7a) Handling:
No particular measures required.
7b) Fire and explosion protection:
No particular measures required.
7c) Storage:
Containers must be closed so that they are airtight
and stored in a dry location.
Galvanised storage containers must not be used.
Description of the components 4

16 Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
8) Exposure prevention and personal protective equip-
ment:
8a) Personal protective equipment:
Breathing protection: Breathing protection
if vapours/aerosols are released.
Hand protection: chemical-resistant protective gloves
(EN 374).
Recommended: Nitrile rubber (NBR), protection class
6.
Owing to the large variety of types, observe the
manufacturers' operating instructions.
Eye protection: Safety glasses with lateral protection
(framed glasses) (EN 166)
8b) General protection and hygiene measures:
The usual precautions for working with chemicals
must be observed.
9) Physical and chemical properties:
Form: Liquid.
Colour: Fluorescent red.
Smell: Product-specific.
Freezing point: Approx. -25ºC (ASTM D 1177)
Solidification point: Approx. -31ºC (DIN 51583)
Boiling point: >100ºC (ASTM D 1120)
Flashpoint: N/A
Lower explosion limit: 2.6 vol% (propylene glycol)
Upper explosion limit: 12.6 vol% (propylene glycol)
Ignition temperature: N/A
Vapour pressure (20° C): 20 mbar
Density (20ºC): Approx. 1,030 g/cm3(DIN 51757)
Solubility in water: Completely soluble
Solubility in other solvents: Soluble in polar
solvents
pH value (20ºC): 9.0 - 10.5 (ASTM D 1287)
Viscosity (kinematic at 20ºC): Approx. 5.0 mm2/s (DIN
51562)
10) Stability and reactivity:
10a) Substances to be avoided:
Strong oxidants
10b) Hazardous reactions:
No dangerous reactions if the storage and handling
regulations/notes are observed
10c) Hazardous decomposition products:
No dangerous decomposition products if the storage
and handling regulations/notes are observed.
11) Toxicology information:
LD50/oral/rat: > 2000 mg/kg
Primary skin irritation (rabbits):
Non-irritant (OECD Directive 404).
Primary mucous membrane irritation (rabbits):
Non-irritant (OECD Directive 405).
11a) Additional information:
The product has not been checked. The statements
are derived from the properties of the individual com-
ponents.
12) Ecology information:
12a) Ecotoxicity:
Fish toxicity: Leuciscus idus/LC50 (96 h):
> 100 mg/l
Aquatic invertebrates: EC50 (48 h): > 100 mg/l
Aquatic plants: EC50 (72 h): > 100 mg/l
Micro-organisms/effect on activated sludge:
DEV-L2 > 1000 mg/l. If low concentrations are pro-
perly introduced into adapted biological waste water
treatment plants, no disturbances of the degradation
activity of activated sludge are to be expected.
12b) Assessment of aquatic toxicity:
The product has not been checked. The statements
are derived from the properties of the individual com-
ponents.
12c) Persistence and degradability:
Details regarding elimination:
OECD 301A test method (new version)
Analysis method: DOC acceptance
Degree of elimination: > 70 %
Assessment: easily biodegradable.
13) Information on disposal:
13a) Disposal:
When disposing of the fluid, you must observe all local
regulations, e.g. take the waste to a suitable dump or
incinerator. For quantities of less than
100 l, contact the local city cleaning department
or mobile environmental service.
13b) Contaminated packaging:
Uncontaminated packaging can be reused. Packaging
that cannot be cleaned must be disposed of in the
same way as the material.
14) Information on transport:
Not dangerous goods in terms of the transport
regulations.
(ADR RID ADNR IMDG/GGV, see ICAO/IATA)
15) Legislation:
15a) European Union legislation (labelling)/national
regulations:
EU Directive 1999/45/EC
(Dangerous Preparations Directive):
No labelling obligation
15b) Other legislation:
Water hazard class 1: Low hazard to water
(Germany, VwVwS of 17.05.1999).
4 Description of the components

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 17
16) Other information
Complete wording for hazard symbols and R phrases
if stated in "Hazardous ingredients"
in section 3: Xi: Irritant. R36: Irritates the eyes.
All information which has been changed since the last
edition is identified by means of a vertical slash on
the left-hand side of the passage in question.
In such cases, the information shown in older editions
loses its validity.
The safety data sheet is intended to communicate the
most important physical, safety-related, toxicological,
and ecological information to be observed when wor-
king with chemicals and preparations and to provide
recommendations for safe use and/or storage, hand-
ling, and transport. No liability is assumed for damage
in connection with the usage of this information or
the usage, application, adaptation or processing of the
products described here. This does not apply as long
as we, our statutory agents or assistants are liable in
the event
of intention or gross negligence. No liability is assu-
med for indirect damage.
This information has been compiled to the best of our
knowledge and conscience according to our current
state of knowledge. No guarantee can be made for
product properties.
17) Valid as of: 01.01.2009
Created by: Vaillant GmbH.
4.3 System configuration
The Vaillant solar heating system enables various sys-
tem configurations and control types in accordance with
the connection wiring diagrams 1 to 6 (¬section 6.8).
iSingle-channel eBUS controllers are not suitable
for this system configuration.
Wiring
If you use an eBUS-compatible Vaillant gas-fired wall-
hung boiler, you can use one of the Vaillant Control Cen-
tres to wire the system.
For all other gas-fired wall-hung boilers, you can use a
standard cabling box.
4.3.1 Vaillant controllers and their basic functions
VRS560/2 solar controller
The auroMATIC 560/2 solar controller is a differential
temperature-controlled control set for solar-aided hot
water production with demand-controlled primary heat-
ing for Vaillant gas-fired wall-hung boilers.
The control set is a fully equipped system for solar heat-
ing systems with a collector array and cylinder.
If a solar yield temperature sensor (VR 10, supplied with
controller) is connected, the solar yield can be recorded.
Control Centre
A Vaillant Control Centre provides a system solution
which allows the Vaillant dual-channel eBUS controller
(low-voltage) to be used in the English market with
valves and domestic hot water cylinders with conven-
tional 230 V cylinder thermostats.
The Control Centre sends the information on the heat
requirement of the cylinder to the Vaillant ecoTEC gas-
fired wall-hung boiler. The gas-fired wall-hung boiler
decides whether a hot water requirement needs to be
met and sends a signal to control the 230 V valves via
the Control Centre.
The gas-fired wall-hung boiler can thus hold different set
temperature values for heating mode and for hot water
handling.
A Control Centre can be used to integrate commonly
available 230 V S plan or Y plan components into the
Vaillant eBUS system.
VRC weather compensator
(VRC430, VRC430f, VRC470, VRC470f)
A VRC controller controls the solar heating system in a
weather-compensated and time-dependent manner with
or without hot water production/a circulation pump in
conjunction with a Vaillant gas-fired wall-hung boiler
with an eBUS interface and the Vaillant VR68/2 solar
module.
Solar module VR 68/2
The VR68/2 solar module integrates a solar heating sys-
tem into the control concept of a VRC controller. In con-
junction with a VRC controller , various solar heating
system configurations can be implemented and the solar
yield recorded. You can combine the VR68/2 solar mod-
ule with a VR61/2 mixer module in a solar heating sys-
tem.
VR 61/2 mixer module
The VR61/2 mixer module is a system component which
controls a cylinder charging circuit or circulation pump
in conjunction with a VRC controller.
You can use the VR 61/2 mixer module to control a solar
heating system for the heating of potable water in conjunc-
tion with a VRC controller and the VR68/2 solar module.
Description of the components 4

18 Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
4.3.2 Control functions
Hot water temperature control
The hot water temperature in the top half of the cylinder
can be controlled in one of the following ways:
– Vaillant auroMATIC VRS 560/2 solar controller or
– using one of the Vaillant Control Centre‘s with the Vail-
lant dual-channel eBUS controller
– Vaillant VRC weather compensator with VR 61/2 mixer
module and VR68/2 solar module or
– using the cylinder thermostat in conjunction with a timer.
If you are using a controller by a third-party manufac-
turer, you use this controller to adjust the hot water
temperature. In this case, the Vaillant controller (e.g.
auroMATIC 560/2) acts only as a solar controller and
only controls the temperatures for solar water heating.
Solar circuit control system
The solar circuit can be controlled in one of the follow-
ing ways:
VRS560/2
(connection wiring diagrams 1, 2, 3, 4, and 6,
¬section6.8)
The lower cylinder sensor (SP 2) and the solar yield
temperature sensor are connected up to the VRS 560/2.
The solar pump is controlled via the VRS560/2.
VRC with VR 68/2
(connection wiring diagram 5, ¬ section 6.8)
The lower cylinder sensor (SP 2) and the solar yield
temperature sensor are connected up to the VR68/2.
The solar pump is controlled via a VRC.
1
230 V~
3A
C
D
B
4
2
6
SP 1
SP 2
7
Kol 1
5
Fig. 4.5 Temperature differential control of solar pump
Key
1 Solar controller or solar module
2 Gas-fired wall-hung boiler
3 Solar cylinder
4 Solar circuit thermal cut-out
5 Solar yield temperature sensor
6 Solar pump
7 Solar pump unit
Kol 1 Collector sensor for flow line collector temperature
SP1 Cylinder sensor for upper cylinder temperature
(primary heating circuit/standby section)
SP2 Cylinder sensor for lower cylinder temperature (solar circuit)
A Primary heater flow
B Primary heater return
C Solar flow
D Solar return
Temperature differences, not absolute temperature val-
ues, are important for the operation of solar heating
systems. For this reason, solar heating systems are con-
trolled via temperature differential controllers.
Integrated temperature sensors record the temperature
difference between the collector and the cylinder.
If the temperature difference (Kol 1–SP2) is larger than
7K, the solar heating system's solar pump is switched on.
If the temperature difference (Kol 1–SP2) is smaller
than 3K, the solar heating system's solar pump is
switched off.
4 Description of the components

Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02 19
Primary heating circuit control system
The primary heating circuit can be controlled in one
of the following ways:
Vaillant dual-channel eBUS controller with Vaillant
Control Centre (connection wiring diagrams 1 and 2,
¬section 6.8)
Important:
Terminals NTC and CYL. of the Vaillant Control Centre
may not be connected at the same time.
– Option 1: The upper cylinder sensor NTC is connected to
terminal NTC of the Vaillant Control Centre.
The recharging of the cylinder is controlled via the eBUS
controller. Here, the cylinder temperature is measured
using the cylinder sensor NTC. The temperature is com-
pared with the target value programmed in the eBUS
controller and the cylinder is reheated if necessary.
– Option 2: The cylinder thermostat is connected
up to terminal CYL. of the Vaillant Control Centre.
The recharging of the cylinder is triggered via the cylin-
der thermostat. If the actual value falls below the target
temperature set on the cylinder thermostat, the cylinder
thermostat is shut. The closing of the cylinder thermo-
stat is registered by the Vaillant Control Centre and
passed onto the eBUS controller.
The eBUS controller releases the recharging of the
cylinder for the programmed primary heating times:
The primary heating device activates and the Vaillant
Control Centre switches the zone valves into the correct
position for the recharging of the cylinder.
The required zone valve position differs depending
on whether the S plan is being used:
– S plan: Valve CH closed, valve DHW open.
VRS560/2
(connection wiring diagrams 3 and 4, ¬section6.8)
The upper cylinder sensor is connected to the terminal
SP1 of the VRS560/2.
The output EP of the VRS 560/2 is connected to the
input CYL. of the Vaillant Control Centre.
The recharging of the cylinder is controlled via the
VRS 560/2. Here, the sensor SP1 measures the cylinder
temperature. The temperature is compared with the pro-
grammed target value in the VRS560/2.
Within the primary heating times programmed in the
VRS560/2, the contact EP is closed if the actual value
falls below the target temperature for the cylinder.
The closing of the contact EP is registered by the
Vaillant Control Centre and the recharging of the cylin-
der is triggered: The primary heating device activates
and the Vaillant Control Centre switches the zone valves
into the correct position for the recharging of the cylin-
der.
The required zone valve position differs depending
on whether the S plan is being used:
– S plan: Valve CH closed, valve DHW open.
Vaillant dual-channel eBUS controller with VR68/2
(connection wiring diagram 5, ¬section 6.8)
The upper cylinder sensor is connected to the terminal
SP1 of the VR68/2.
The recharging of the cylinder is controlled via the eBUS
controller, which is connected with the VR68/2 and
VR61/2 via eBUS. The zone valves are switched via the
VR61/2 (valve DHW open, heating circuit valve closed).
VRS560/2 in conjunction with non-eBUS-compatible
controllers (connection wiring diagram 6, ¬section6.8)
The upper cylinder sensor is connected to the terminal
SP1 of the VRS560/2.
The output EP of the VRS560/2 is connected to the
wiring of the S plan via the cylinder thermostat.
Important:
The target temperature on the cylinder thermostat must
be set to the maximum temperature!
The recharging of the cylinder is controlled via the
VRS 560/2. Here, the sensor SP1 measures the cylinder
temperature. The temperature is compared with the pro-
grammed target value in the VRS560/2.
Within the primary heating times programmed in the
VRS560/2, the contact EP is closed if the actual value
falls below the target temperature for the cylinder.
The switching signal is coupled into an S plan and the
recharging of the cylinder is triggered.
Room heating control
The room heating can be controlled in one of the follow-
ing ways:
Vaillant dual-channel eBUS controller with Vaillant
Control Centre (connection wiring diagrams 1, 2, 3,
and 4, ¬section 6.8)
The room heating is controlled by the Vaillant
eBUS controller.
The actuation of the valves (S plan plan)
is controlled by the Vaillant Control Centre.
Vaillant dual-channel eBUS controller with VR61/2
(connection wiring diagram 5, ¬section 6.8)
The room heating is controlled by the Vaillant eBUS
controller.
The actuation of the valves (S plan plan) is controlled by
the VR61/2.
Programmable timer and room thermostat
(connection wiring diagram 6, ¬section6.8)
The room heating is controlled using a programmable
timer and a room thermostat.
The actuation of the valves (S plan) is realised
via the programmable timer and DHW timer.
Description of the components 4

20 Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
4.3.3 Technical data of the auroSTOR solar cylinder
Unit VIH S GB 210/2 S VIH S GB 260/2 S VIH S GB 310/2 S
Total capacity litres 210 260 310
Actual capacity litres 209,4 254,4 297,2
Hot water capacity (upper coil) litres 104,8 142,0 144,2
Hot water capacity (solar coil) litres 203,3 246,1 271,1
Dedicated solar volume litres 104,6 112,4 153,0
Maximum supply pressure to pressure reducing valve MPA (bar) 1,2 (12)
Rated pressure of cylinder MPA (bar) 0,7 (7)
Maximum operating pressure of heating coil MPA (bar) 0,35 (3,5)
Maximum operating pressure of solar coil MPA (bar) 0,6 (6)
Operating pressure MPA (bar) 0,35 (3,5)
Pressure limiting valve MPA (bar) 0,35 (3,5)
Expansion relief valve MPA (bar) 0,6 (6)
Temperature and pressure relief valve °C,
MPA (bar) 90, 0,7 (7)
Charge pressure of hot water expansion vessel MPA (bar) 0,4 (4)
Maximum temperature of heating circuit °C 85
Maximum temperature of potable hot water °C 85
Maximum temperature of solar fluid °C 85
Standing heat loss kW/24 h 1,98 2,15 2,35
Heat up time according to EN 12897 mins 20 27 28
Recovery time (70% capacity) mins 15 20 21
Primary heat exchanger performance kW 16,7 16,5 16,0
Flow rate for primary heat exchanger performance l/min 23,3
Primary heat exchanger pressure drop mbar 79 78 79
Primary heat exchanger volume Liter 2,37
Primary heat exchanger surface area m20,5
Heat up time according to EN 12897 (solar) min 32 40 49
Solar heat exchanger performance kW 19,7 19,5 17,2
Flow rate for solar heat exchanger output l/min 23,3
Solar heat exchanger pressure drop mbar 97 95 98
Solar heat exchanger volume Liter 2,94
Solar heat exchanger surface area m20,62
Dimensions
Height mm 1593 1843 2153
Height with hot water draw off mm 1625 1875 2185
Topple measure mm 1680 1918 2217
Diameter mm 554,5
Depth mm 633
Net weight kg 40 43 50
Weight (full) kg 249 298 347
Connections
Cold water inlet 22 mm unprofiled pipe (crimp joints)
Hot water draw off 22 mm unprofiled pipe (crimp joints)
Balanced pressure cold water outlet 22 mm unprofiled pipe (crimp joints)
Secondary return 15 mm unprofiled pipe (crimp joints)
Primary heater flow 22 mm unprofiled pipe (crimp joints)
Primary heater return 22 mm unprofiled pipe (crimp joints)
Solar flow 22 mm unprofiled pipe (crimp joints)
Solar return 22 mm unprofiled pipe (crimp joints)
Primary heating circuit cylinder dry pocket size mm 8
Solar circuit cylinder dry pocket size mm 8
Tab. 4.2 Technical data for auroSTOR solar cylinder
4 Description of the components