Vaillant uniSTOR Specification sheet

For the heating engineer
Operating and Installation Manual
uniSTOR, auroSTOR, geoSTOR
Bivalent DHW Cylinder for Solar Systems
DHW Cylinder for Heating Systems
DHW Cylinder for Heat Pumps
VIH S 300
VIH S 400
VIH S 500
VIH R 300
VIH R 400
VIH R 500
VIH RW 300
EXP

Contents
1 Notes on the documentation........................... 2
1.1 Storing the documents............................................ 2
1.2 Symbols used............................................................. 2
2 Description of the appliance ........................... 3
2.1 Construction and function...................................... 3
2.2 Conformity with Directives..................................... 3
2.3 Model overview.......................................................... 3
2.4 Identification plate.................................................... 3
3 Safety instructions and regulations .............. 3
3.1 Safety instructions ................................................... 3
3.2 Intended use............................................................... 4
3.3 Regulations and guidelines..................................... 4
4 Operation ........................................................... 4
4.1 Filling and draining the DHW cylinder ................. 4
4.2 Care .............................................................................. 5
4.3 Inspection and maintenance.................................. 5
5 Installation......................................................... 5
5.1 Installation location.................................................. 5
5.2 Dimensions.................................................................. 5
5.2.1 Tilting dimensions for VIH S, VIH R and
VIH RW......................................................................... 5
5.2.2 Unit and connection dimensions VIH S ............... 6
5.2.3 Unit and connection dimensions VIH R .............. 7
5.2.4 Unit and connection dimensions VIH RW ........... 8
5.3 Transport to the installation location.................. 9
5.3.1 Transport in the packaging .................................... 9
5.3.2 Transport without packaging................................. 9
5.3.3 Transport without cladding.................................... 10
5.3.4 Transport without insulation ................................. 11
5.3.5 Fitting the insulation and the casing ................... 11
5.4 Connecting the cylinder .......................................... 12
6 Start-up.............................................................. 13
6.1 Regulations................................................................. 13
7 Maintenance ...................................................... 13
7.1 Cleaning the internal tank ...................................... 13
7.2 Servicing the magnesium sacrificial anode........ 13
7.3 Replacement parts.................................................... 14
8 Recycling and disposal..................................... 14
8.1 Unit ............................................................................... 14
8.2 Packaging.................................................................... 14
9 Vaillant Customer Service and warranty...... 14
9.1 Vaillant customer service ....................................... 14
9.2 Manufacturer's warranty ........................................ 14
10 Technical data................................................... 15
10.1 Technical data for VIH S 300/400/500 and
VIH R 300/400/500 ................................................ 15
10.2 Technical data for VIH RW 300............................. 16
Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 020080043_002
Contents
1 Notes on the documentation
1 Notes on the documentation
The following instructions are intended to guide you
throughout the entire documentation. Further docu-
ments apply in combination with this installation instruc-
tions.
We accept no liability for any damage caused by non-
observance of these instructions.
Other applicable documents
When installing the cylinder, please observe all installa-
tion instructions for components of the system. These
manuals are included with the individual parts of the in-
stallation and ancillary components.
1.1 Storing the documents
Pass these installation instructions and all other applica-
ble documents and, if necessary, any required aids to
the system operator. Whose responsibility it is to ensure
the manuals and auxiliary material are available when-
ever required.
1.2 Symbols used
Take note of the safety information in this manual when
installing the equipment.
The symbols used in the manual are explained below:
dDanger!
Immediate risk of serious injury or death!
HDanger!
Danger of burning or scalding!
aCaution!
Potentially dangerous situation for the product
and environment!
hNote!
Useful information and instructions.
• Symbol for a necessary task

3Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
2 Description of the appliance
2.1 Construction and function
Vaillant VIH S 300/400/500 solar cylinders are used as
indirectly heated DHW cylinders for solar-assisted hot
water generation.
Vaillant VIH R 300/400/500 cylinders are indirectly
heated DHW cylinders.
Vaillant VIH RW 300 cylinders are indirectly heated
DHW cylinders intended specifically for heat pumps.
The cylinders and the pipe coils are enamelled on the
DHW side to ensure long service lives. Each tank has a
magnesium sacrificial anode for additional corrosion
protection. A maintenance-free external current anode
is available as an accessory.
The CFC-free EPS insulation provides the best thermal
insulation.
Furthermore, an electric heating element (accessory)
can be installed in the cylinders (except for the
VIH RW 300) to support post-heating, so that post-heat-
ing by the boiler can be completely dispensed with in
summer operation.
The heat is transferred by means of one (VIH R, RW) or
two (VIH S) welded-in coiled pipes.
The cylinder is connected to the water mains via the
cold water connection and to the draw-off points via the
hot water connection. If hot water is run from one of
the draw-off points, cold water will flow into the cylinder
where it is heated up to the temperature set on the cyl-
inder temperature controller.
VIH S only
In VIH S type solar cylinders, the heating takes place in
two separate circuits.
The solar heat exchanger is located in the lower, cold
area. The relatively low water temperatures in the bot-
tom area ensure optimum heat transfer from the solar
circuit to the storage water even if there is only a low
level of solar radiation.
In contrast to solar heating, the hot water is post-heat-
ed by the boiler or circulation water heater in the upper,
warmer zone of the cylinder. The standby volume for
post-heating is about a third of the cylinder volume.
2.2 Conformity with Directives
We confirm that our product is manufactured in accord-
ance with the EU Pressure Equipment Directive.
2.3 Model overview
The cylinders are available in the following sizes:
VIH S Cylinder volume
VIH S 300 289 litres
VIH S 400 398 litres
VIH S 500 484 litres
Table 1.1 VIH S model overview
VIH R Cylinder volume
VIH R 300 295 litres
VIH R 400 404 litres
VIH R 500 496 litres
Table 1.2 VIH R model overview
VIH RW Cylinder volume
VIH RW 300 285 litres
Table 2.3 VIH RW model overview
2.4 Identification plate
An identification plate has been fixed to the top of the
casing at the factory.
3 Safety instructions and regulations
Vaillant VIH S, VIH R and VIH RW cylinders are con-
structed using state-of-the-art technology in accordance
with recognised safety regulations. Nevertheless, there
is still a risk of injury or death to the user or others or
of damage to the unit and other property in the event of
improper use or use for which they are not intended.
aCaution!
The units may only be used to heat up drinking
water. Damage to the appliance due to corro-
sion cannot be excluded if the water does not
correspond to the specifications of the drinking
water ordinance.
3.1 Safety instructions
The VIH S 300/400/500 solar cylinders and
VIH R 300/400/500 and VIH RW 300 cylinders must be
installed by a qualified heating engineer, who is respon-
sible for compliance with existing regulations, rules and
directives.
We only honour the manufacturer’s warranty if the in-
stallation is performed by an approved qualified servic-
ing company which is also responsible for the inspec-
tion/maintenance of, and repairs and alterations to the
cylinders.
Safety valve and blow-off line
The water volume is increased each time the hot water
is heated in the cylinder, which is the reason why each
cylinder must be equipped with an expansion relief valve
and an exhaust line.
Description of the appliance 2
Safety instructions and regulations 3

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_004
Water escapes from the blow-off line during heating
(Exception: an expansion tank for domestic water is
available).
The blow-off line must be fed to an appropriate drain
point where nobody can be put at risk.
Therefore do not block the expansion relief valve or the
blow-off line.
HDanger!
Danger of scalding due to hot water!
With the VIH S solar cylinder, the outlet tem-
peratures at the taps can be up to 85 °C.
Danger of frost!
The cylinder must be completely drained if its is to be
shut down for a long period of time in an unheated
room (e. g. winter holidays etc.).
Alterations
You must not make any alterations to the cylinder or its
control system, the water and electricity supply lines
(if installed), the blow-off line or the expansion relief
valve for the cylinder water.
Leaks
In the event of a leak in the hot water line area between
the cylinder and extraction point, please close the cold
water shut-off valve at the cylinder and have the leak
repaired by a suitably qualified heating engineer.
3.2 Intended use
Vaillant VIH S, VIH R and VIH RW cylinders are used
solely to supply households and industry with domestic
hot water at up to 85 °C in accordance with the drinking
water ordinance.
They may only be used for this purpose. Any improper
use is forbidden.
The cylinders must be used in combination with Vaillant
boilers and circulation water heaters.
VIH S solar cylinders must be used with the Vaillant
solar system.
The VIH RW 300 must be used with a geoTHERM heat
pump.
The cylinders can be integrated without problems into
any Vaillant or other water-based central heating instal-
lation, in which case this manual must be observed.
However, the VIH S and VIH R cylinders can also be sup-
plied with remote heat from a transfer station. In this
case, other performance data will have to be taken into
consideration.
This unit is not intended for use by persons (including
children) with physical, sensory or mental impairments
or who have inadequate experience and/or knowledge,
unless they are supervised by a person responsible for
their safety or have been given instructions by this per-
son regarding the operation of the unit.
Children must be supervised to ensure they do not play
with the unit.
Any other or additional use is considered to be improp-
er. The manufacturer or supplier is not liable for any re-
sulting damage. The user alone bears the risk.
Intended use includes observing the operating and in-
stallation manual and adhering to the care and inspec-
tion conditions.
aCaution!
Any improper use is forbidden.
3.3 Regulations and guidelines
Observe all applicable national regulations and guide-
lines.
Before the installation, check if there are further local
regulations.
4 Operation
The VIH S solar cylinder can be controlled by all Vaillant
solar controllers.
The VIH R cylinder can be combined with various con-
trollers and boilers.
The VIH RW cylinder is controlled by the heat pump con-
trollers.
In each case, the temperature of the water in the cylin-
der is set and read on the assigned control unit.
4.1 Filling and draining the DHW cylinder
Proceed as follows when putting your cylinder into serv-
ice (e. g. after switching off and draining the appliance
due to a long period of absence):
• Before heating water for the first time, open a hot
water draw-off point (tap) to check whether the vessel
is filled with water and that the stop valve in the cold
water supply pipe is not closed.
• Check that the heat source is ready for operation.
• Set the temperature for the water in the VIH cylinder
on the controller or on the boiler.
• You can read the temperature that has been reached
on the controller or on the boiler.
hNote!
When heating up for the first time or after long
shut-down breaks, the full output of the cylin-
der is only available after a waiting period.
3 Safety instructions and regulations
4 Operation

5Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
hNote!
For reasons of economy and hygiene, we re-
commend setting the cylinder temperature to
60 °C and to 55 °C on the VIH RW 300 heat
pump cylinder, owing to the low system tem-
peratures. This ensures the most efficient use
in terms of the energy saving law (EnEG) and
slows down the deposition of limescale in the
cylinder.
Proceed in the reverse sequence when taking the cylin-
der out of service and also drain the cylinder if neces-
sary (e.g. if there is a risk of frost).
dDanger!
Do not block the expansion relief valve or the
blow-off line - this could cause the overpres-
sure in the cylinder to build up to more than
10 bar.
4.2 Care
A damp cloth soaked with soap solution is all you need
to clean the outer parts of the cylinder.
To avoid damage to the casing of your appliance, please
do not use any abrasive or solvent cleaning agents (any
type of abrasive, petrol, etc.)
4.3 Inspection and maintenance
The prerequisite for permanent operational readiness,
reliability and a long service life is that regular inspec-
tions/maintenance work are performed on the cylinder
by the technician.
aCaution!
Never try to carry out maintenance work on
your appliance of your own accord. Use an ap-
proved qualified servicing company for this
work.
We recommend making a maintenance agreement with
an approved qualified servicing company.
dDanger!
The operational reliability of the appliance can
be impaired, resulting in damage to property or
personal injury, if inspections or maintenance
work are not carried out.
We recommend periodic de-scaling if the water is very
calcareous.
5 Installation
aCaution!
The appliance may only be installed and put
into service by a suitably qualified heating en-
gineer. The engineer also assumes responsibili-
ty for professional and approved installation
and initial commissioning.
A sign that reads as follows must be mounted near the
blow-off line for the expansion relief valve:
"For safety reasons, water escapes from the blow-off
line of the expansion relief valve while the cylinder is
heated. Do not block the line."
5.1 Installation location
The DHW cylinder should be installed in the immediate
vicinity of the heat source. Unnecessary heat losses can
be avoided as a result.
When choosing the installation site, take the weight of
the filled cylinder into account. Choose the installation
site for the cylinder so that the pipes on both the hot
water and the heating and solar side can be laid conven-
iently.
The DHW cylinder must be installed in a frost-protected
room.
To prevent energy losses, thermal insulation should be
fitted on all hydraulic pipes in accordance with the heat-
ing systems ordinance.
5.2 Dimensions
5.2.1 Tilting dimensions for VIH S, VIH R and
VIH RW
1894
1781
VIH 300
1683
1552
VIH 400
1952
1829
VIH 500
Fig. 5.1 Tilting dimensions for VIH S, VIH R and VIH RW
Operation 4
Installation 5

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_006
5.2.2 Unit and connection dimensions VIH S
Ø b
D
B
M
L
K
J
I
H
G
F
E
t
C
A
3
4
5
6
7
8
9
10
11
1
2
Fig. 5.2 Unit and connection dimensions VIH S
Key to Fig. 5.2
1 Connection for heating element (G1 1/2)
2 Inspection opening (Ø120)
3 Hot water connection (R1)
4 Heating flow (R1)
5 Pocket for heating sensor (Ø12)
6 Heating return (R1)
7 Circulation connection (R3/4)
8 Solar flow (R1)
9 Pocket for solar sensor (Ø12)
10 Solar return (R1)
11 Cold water connection (R1)
Type Units VIH S 300 VIH S 400 VIH S 500
A mm 1775 1470 1775
B mm 279 308 308
C mm 1086 862.5 1062.5
D mm 500 650 650
E mm 1632 1301 1601
F mm 1546 1215 1515
G mm 1346 1065 1315
H mm 1196 965 1165
I mm 1086 862.5 1062.5
J mm 981 760 960
K mm 581 510 610
L mm 216 245 245
M mm 130 159 159
b mm 660 810 810
t mm 725 875 875
Table 5.1 VIH S unit dimensions
5 Installation

7Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
5.2.3 Unit and connection dimensions VIH R
Ø b
D
B
J
I
H
G
F
E
t
C
A
2
1
7
6
5
4
3
8
Fig. 5.3 Unit and connection dimensions VIH R
Key to Fig. 5.3
1 Connection for heating element (G1 1/2)
2 Inspection opening (Ø120)
3 Hot water connection (R1)
4 Circulation connection (R3/4)
5 Heating flow (R1)
6 Pocket for heating sensor (Ø12)
7 Heating return (R1)
8 Cold water connection (R1)
Type Units VIH R 300 VIH R 400 VIH R 500
A mm 1775 1470 1775
B mm 279 308 308
C mm 1086 862.5 1062.5
D mm 500 650 650
E mm 1632 1301 1601
F mm 1086 862.5 1062.5
G mm 981 760 960
H mm 581 510 610
I mm 216 245 245
J mm 130 159 159
b mm 660 810 810
t mm 725 875 875
Table 5.2 VIH R unit dimensions
Installation 5

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_008
5.2.4 Unit and connection dimensions VIH RW
Ø b
D
B
J
I
H
G
F
E
t
A
3
4
5
6
7
8
2
Fig. 5.4 Unit and connection dimensions VIH RW
Key to Fig. 5.4
2 Inspection opening (Ø120)
3 Hot water connection (R1)
4 Heating flow (R1)
5 Circulation connection (R3/4)
6 Pocket for heating sensor (Ø12)
7 Heating return (R1)
8 Cold water connection (R1)
Type Units VIH RW 300
A mm 1775
B mm 279
D mm 500
E mm 1632
F mm 1546
G mm 1086
H mm 581
I mm 216
J mm 130
b mm 660
t mm 725
Table 5.3 VIH RW unit dimensions
5 Installation

9Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
5.3 Transport to the installation location
The cylinder is delivered fully assembled.
You have various options for transport to the installa-
tion site.
– Complete in the packaging, if possible at the customer
side
– Without packaging, completely assembled, if the
transport route permits it
– Without casing or insulation, for narrow doorways or
to protect the casing
hNote!
To remove and refit the casing and insulation
takes 1 person approx. 10 minutes.
Note!
The installation can optionally be carried out
with or without the insulation / casing.
Note!
If necessary, use the transport aids from the
accessories.
aCaution!
Damage to the cylinder.
If the cylinder is brought to the installation lo-
cation on a trolley or carried there, pay atten-
tion to the insulation on the base of the cylin-
der. It must not be damaged.
5.3.1 Transport in the packaging
Fig. 5.5 Transport in the packaging, consisting of top and bot-
tom styrofoam pads and a cardboard sleeve carton
5.3.2 Transport without packaging
Fig. 5.6 Transport without packaging
Installation 5

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_0010
• Remove the top pad and the cardboard sleeve carton.
• Pull the cylinder on the bottom pad over the edge of
the pallet until you can break off the bottom pad at
the intended point with your foot.
• Position the hand cart in front of the pallet and load
the cylinder on to it.
5.3.3 Transport without cladding
1
Fig. 5.7 Removing the top cap and covers
• Remove the top cap from the cylinder.
• Pull the two covers (1) off the front of the cylinder.
300l variant:
1
Fig. 5.8 Releasing the jacket
• Unfasten the 6 screws (1) at the rear of the cylinder.
• Take the jacket in your hand and walk once round the
tank so that the jacket rolls up.
400l and 500l variants:
1
Fig. 5.9 Releasing the jacket
5 Installation

11Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
• On the rear of the cylinder, first unfasten the 3 plastic
screws (1) on one side only of the aluminium strip
(using, e.g., a coin).
• Grip the jacket by the aluminium rail and walk round
the cylinder with it so that you are holding the jacket
inside out in a droplet shape.
• Now unfasten the 3 plastic screws on the other alu-
minium rail, pull out the aluminium rail and clamp the
two ends together with the enclosed clip.
Fig. 5.10 Fastening the casing jacket with the clip
5.3.4 Transport without insulation
Fig. 5.11 Removing the insulation
• Using a knife, separate the adhesive film at the front
and rear joints.
• First remove one of the lower half shells by pulling it
to the side, then the other lower half shell.
• Depending on the size of the unit, now remove either
the upper half shells or the cover cap.
5.3.5 Fitting the insulation and the casing
To fit the insulation and the casing, proceed in the re-
verse order:
• Fit the casing from top to bottom and fix the insula-
tion sections with adhesive strips over the joint.
hNote!
The adhesive strips are on a paper backing at
the rear right hand side next to the joint.
Installation 5

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_0012
300l variant:
• Fit the casing as follows:
Lay the strip with the holes on the retaining pins and
screw it down securely.
400l and 500l variants:
• Fit the jacket by positioning an aluminium rail with the
holes on the locking pins and fastening it with the
plastic screws. To do this, you need only snap in the
screws, not turn them.
• After fastening the two aluminium rails, attach the
cover cap and the front covers.
hNote!
Check that the front covers are correctly seat-
ed, to prevent heat loss.
• Align the cylinder vertically with the adjustable feet.
5.4 Connecting the cylinder
VIH S:
Proceed as follows when installing the cylinder
(see Fig. 5.2):
• Connect the heating flow (4) and return (6) to the
cylinder.
• Connect the solar flow (8) and return (10) to the cylin-
der.
hNote!
Observe the enclosed solar system manual!
• Install the cold water pipe (11) with the necessary
safety devices:
If the water pressure at the installation location is less
than 10 bar, a proof-tested DN 25 safety group can be
used.
• Install a T-piece in the cold water pipe between the
cylinder connection and the safety group for draining
the cylinder.
• Install the hot water pipe (3) and, if necessary, the
secondary return (7).
VIH R:
Proceed as follows when installing the cylinder
(see Fig. 5.3):
• Connect the heating flow (5) and return (7) to the cyl-
inder.
• Install the cold water pipe (8) with the necessary safe-
ty devices:
If the water pressure at the installation location is less
than 10 bar, a proof-tested DN 25 safety group can be
used.
• Install a T-piece in the cold water pipe between the
cylinder connection and the safety group for draining
the cylinder.
• Install the hot water pipe (3) and, if necessary, the
secondary return (4).
VIH RW:
Proceed as follows when installing the cylinder
(see Fig. 5.4):
• Connect the heating flow (4) and return (7) to the cyl-
inder.
• Install the cold water pipe (8) with the necessary safe-
ty devices:
If the water pressure at the installation location is less
than 10 bar, a proof-tested DN 25 safety group can be
used.
• Install a T-piece in the cold water pipe between the
cylinder connection and the safety group for draining
the cylinder.
• Install the hot water pipe (3) and, if necessary, the
secondary return (5).
hNote!
As the use of a secondary return results in
standby losses, it should only be connected if
the hot water network is widely distributed.
If a secondary return is necessary, the circula-
tion pump must be fitted with a time switch in
accordance with the Heating Installation Ordi-
nance.
• Fit stainless steel caps to the unused connections, en-
suring they are pressure-tight.
• Carry out the electrical wiring if necessary.
hNote!
Connect all the supply lines with screw cou-
plings.
HDanger!
Risk of scalding!
Please note that a hot water thermostatic
mixer must not be installed in any secondary
return area that might be present, as the scald-
ing protection would no longer be guaranteed.
In such cases, install the hot water thermo-
static mixer downstream of the secondary re-
turn area.
5 Installation

13Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
1
2
3
4
6
7
5
Fig. 5.12 Installing the safety groups
Key to Fig. 5.12
1 Venting knob
2 Blow-off line
3 Stop valve
4 Stop valve with hand wheel
5 Test plug
6 Pressure gauge connection point
7 Backflow preventer
6 Start-up
Once installation is complete, the cylinder must be filled
on the heating and DHW sides. Proceed as follows to do
this:
• VIH S only: Fill the solar circuit (see System Manual).
• Fill the heating side via the boiler filling and draining
connection.
• Check the cylinder and system for leaks.
• Fill the DHW system via the cold water inlet and bleed
the system at a hot water draw-off point.
• Check the function and correct setting of all control
and monitoring devices.
• Program the timer or timer program, if present, on
the controller (define the start of the enable time for
cylinder charging).
• Put the boiler into operation.
• VIH S only: Put the solar system into operation.
6.1 Regulations
Observe all applicable national regulations and guide-
lines.
Before the installation, check if there are further local
regulations.
7 Maintenance
7.1 Cleaning the internal tank
Make sure the cleaning devices and cleaning agents are
in a hygienic condition, since the cleaning work is car-
ried out in the inner tank of the cylinder within the
drinking water area.
Proceed as follows when cleaning the inner tank:
• Drain the cylinder.
• Remove the flange cover on the cleaning eye.
• Clean the cylinder with a jet of water. If necessary,
loosen any deposits with a suitable tool e.g. a wood or
plastic scraper and flush them out.
hNote!
Ensure that the enamelling of the heating coil
and the inner tank is not damaged during the
cleaning work.
• Replace the flange cover with its associated gaskets
on the cleaning eye of the cylinder.
• Tighten the screws.
hNote!
You must replace any old or damaged seals.
• Fill the cylinder and check for leaks.
HDanger!
Risk of being scalded by hot water!
The blow-off line on the expansion relief valve
fitted to the DHW cylinder must remain open at
all times.
Check the function of the expansion relief valve
during servicing by venting it.
If this is not done, the possibility of the cylin-
der bursting cannot be ruled out!
7.2 Servicing the magnesium sacrificial anode
The cylinder is fitted with a magnesium sacrificial anode
which has an average service life of approx. 5 years.
To service the anode, the plastic cover must be re-
moved and the anode released with a 27 mm AF box
spanner or socket.
Visual inspection
• Remove the magnesium sacrificial anode (1) and check
it for erosion.
Installation 5
Start-up 6
Maintenance 7

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_0014
Fig. 7.1 Visual inspection of the magnesium sacrificial anode
The first check of magnesium sacrificial anode must be
carried out after 2 years. After that, the check must be
carried out annually.
If necessary, replace the sacrificial anode with a genuine
replacement magnesium sacrificial anode. You can use a
chain anode if there is little ceiling clearance.
Alternatively you can use a maintenance-free external
current anode.
7.3 Replacement parts
Any spare parts which might be required are itemised in
the respective valid spare parts catalogues.
Enquiries will be answered by the sales departments
and the manufacturer’s customer service.
8 Recycling and disposal
Both the cylinder and its transport packaging are made
primarily of recyclable raw materials.
8.1 Unit
Neither the DHW cylinder nor its accessories should be
disposed of as domestic waste. Make sure the old appli-
ance and any existing accessories are disposed of prop-
erly.
8.2 Packaging
The specialist company that installed the unit is respon-
sible for disposing of the transport packaging.
hNote!
Please observe the applicable national legal
regulations.
9 Vaillant Customer Service and
warranty
Permanent operational readiness, reliability and a long
service life of your DHW cylinder require regular inspec-
tion and maintenance by a heating engineer.
dDanger!
Never attempt to perform maintenance or re-
pairs on your water boiler by yourself. Use an
approved qualified servicing company for this
work. We recommend making a maintenance
agreement. The operational reliability of the de-
vice can be impaired, resulting in damage to
property or personal injury, if maintenance
work is not carried out.
9.1 Vaillant customer service
For advice on repairs for heating engineers, see the ad-
dress on the back page of this manual.
9.2 Manufacturer's warranty
We provide the owner of the unit with a manufacturer's
warranty under certain conditions; you can find out
what these are by contacting the address on the back
page of this manual.
7 Maintenance
8 Recycling and disposal
9 Vaillant Customer Service and warranty

15Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
10 Technical data
10.1 Technical data for VIH S 300/400/500 and
VIH R 300/400/500
Units VIH S VIH R
VIH S 300 VIH S 400 VIH S 500 VIH R 300 VIH R 400 VIH R 500
Nominal cylinder capacity l 300 400 500 300 400 500
Actual cylinder capacity l 289 398 484 295 404 496
Maximum operating pressure – cylinder bar 10 10 10 10 10 10
Maximum operating pressure - heating bar 10 10 10 10 10 10
Max. hot water temperature °C 85 85 85 85 85 85
Maximum hot water flow temperature °C 110 110 110 110 110 110
Standby energy loss kWh/d 1.9 2.1 2.3 1.8 2.0 2.2
Heating heat exchanger:
Heating area of the heat exchanger m20.7 0.7 1.0 1.6 1.5 2.1
Heating water capacity of the heat ex-
changer l 4.7 4.5 6.6 10.7 9.9 14.2
Pressure loss in the heat exchanger at
max. hot water demand mbar 11 11 16 75 75 125
Heating medium flow l/h 900 900 1250 2000 2000 2700
Initial hot water output at 45/10 °C1) l/10min 195 190 215 462 519 591
Continuous hot water output at a heat-
ing water temperature of 85/65 °C2) kW 20 21 29 46 46 62
Continuous hot water output at a heat-
ing water temperature of 85/65 °C2) l/h 491 516 712 1130 130 1523
Output characteristic figure1) NL2.0 3.5 4.7 11.0 15.0 19.0
Solar heat exchanger:
Heating area of the heat exchanger m21.6 1.5 2.1
Heating water capacity of the heat ex-
changer l 10.7 9.9 14.2
Pressure loss in the heat exchanger in
solar mode with solar fluid mbar < 10 < 10 < 10
Solar fluid flow l/h 200 300 500
Connections
Cold water and hot water connection Thread R1 R1 R1 R1 R1 R1
Secondary return connection Thread R3/4R3/4R3/4R3/4R3/4R3/4
Flow and return connections Thread R1 R1 R1 R1 R1 R1
Cylinder dimensions:
Width with casing mm 660 810 810 660 810 810
Depth with casing mm 725 875 875 725 875 875
Height mm 1775 1470 1775 1775 1470 1775
Outer diameter of tank without insula-
tion mm 500 650 650 500 650 650
Weight (incl. packaging and insulation) kg 150 169 198 125 145 165
Weight when filled and ready for opera-
tion kg 439 567 682 420 549 661
Table 10.1 Technical data for VIH S 300/400/500 and
VIH R 300/400/500
1) per DIN 4708, Part 3
2) Temperature difference between hot and cold water: 35 K
Technical data 10

Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_0016
10.2 Technical data for VIH RW 300
Units VIH RW 300
Nominal cylinder capacity l 300
Actual cylinder capacity l 285
Maximum operating pressure – cylinder bar 10
Maximum operating pressure - heating bar 10
Max. hot water temperature °C 85
Maximum hot water forward flow tem-
perature °C 110
Standby energy loss kWh/d 1.8
Heating heat exchanger:
Heating area of the heat exchanger m22.9
Heating water capacity of the heat ex-
changer l 17.5
Pressure loss in the heat exchanger at
max. hot water demand mbar 124
Heating medium flow l/h 2000
Initial hot water output at 10/45 °C and a
cylinder temperature of 60 °C l/10min 410
Continuous hot water output at 10/45 °C
and a heating water temperature of
60/50 °C kW 14
Continuous hot water output at 10/45 °C
and a heating water temperature of
60/50 °C l/h 345
Output characteristic figure NL–
Connections
Cold water and hot water connection Thread R1
Secondary return connection Thread R3/4
Flow and return connections Thread R1
Cylinder dimensions:
Width with casing mm 660
Depth with casing mm 725
Height mm 1775
Outer diameter of tank without insula-
tion mm 500
Weight (incl. packaging and insulation) kg 155
Weight when filled and ready for
operation kg 440
Table 10.2 Technical data for VIH RW 300
10 Technical data

0020080043_00 EXP 062009 - Subject to alterations