Vaillant uniSTOR VIH GB /3 BES Series User manual

Installation and maintenance instructions
uniSTOR
VIH GB .../3 BES
GB, IE
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone] Fax [phone]
[email protected] www.vaillant.de

Contents
2Installation and maintenance instructions uniSTOR 0020221302_02
Contents
1 Safety .................................................................... 3
1.1 Action-related warnings ......................................... 3
1.2 Risk caused by inadequate qualifications.............. 3
1.3 Intended use .......................................................... 3
1.4 General safety information .................................... 3
1.5 Regulations (directives, laws, standards) .............. 4
2 Notes on the documentation .............................. 5
2.1 Observing other applicable documents ................. 5
2.2 Storing documents................................................. 5
2.3 Validity of the instructions...................................... 5
2.4 Benchmark............................................................. 5
3 Product description............................................. 5
3.1 Serial number ........................................................ 5
3.2 Information on the identification plate.................... 5
3.3 CE marking ............................................................ 5
3.4 Hot Water Association ........................................... 6
4 Set-up.................................................................... 6
4.1 Observing the requirements for the product's
installation site ....................................................... 6
4.2 Transport ............................................................... 6
4.3 Unpacking the product........................................... 7
4.4 Checking the scope of delivery.............................. 7
4.5 Product dimensions,slimline .................................. 7
4.6 Product dimensions, standard diameter ................ 8
5 Installation............................................................ 8
5.1 Setting up the unit horizontally .............................. 8
5.2 Hydraulic connection ............................................. 8
5.3 Electrical installation ............................................ 11
6 Start-up ............................................................... 13
6.1 Setting the immersion heater thermostat............. 13
6.2 Cold water inlet pressure..................................... 14
6.3 Filling and purging the product ............................ 14
6.4 Filling and purging the heating circuit .................. 14
7 Handing the product over to the end user ...... 14
8 Troubleshooting ................................................ 14
8.1 Detecting and eliminating faults........................... 14
8.2 Procuring spare parts .......................................... 14
9 Inspection and maintenance ............................ 14
9.1 Observing inspection and maintenance
intervals ............................................................... 14
9.2 Draining the product ............................................ 15
9.3 Checking the safety group's expansion relief
valve and the cylinder's expansion relief valve .... 15
9.4 Checking the pre-charge pressure of the
expansion vessel ................................................. 15
10 Decommissioning the product......................... 15
11 Customer service............................................... 15
Appendix ............................................................................ 16
A Detecting and eliminating faults ...................... 16
B Inspection and maintenance work –
Overview............................................................. 16
C Technical data.................................................... 16
D Commissioning Checklist................................. 19
Index ................................................................................... 22

Safety 1
0020221302_02 uniSTOR Installation and maintenance instructions 3
1 Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning signs and
signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Risk caused by inadequate
qualifications
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
1.3 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The product is intended as a system com-
ponent for domestic hot water generation and
storage for closed central heating installa-
tions.
Intended use includes the following:
–observance of accompanying operating,
installation and maintenance instructions
for the product and any other system com-
ponents
–installing and setting up the product in ac-
cordance with the product and system ap-
proval
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
Intended use also covers installation in ac-
cordance with the IP code.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document, shall be considered improper
use. Any direct commercial or industrial use
is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.4 General safety information
1.4.1 Risk of death due to lack of safety
devices
The basic diagrams included in this docu-
ment do not show all safety devices required
for correct installation.
▶Install the necessary safety devices in the
installation.
▶Observe the applicable national and inter-
national laws, standards and directives.
1.4.2 Risk of death from electric shock
There is a risk of death from electric shock if
you touch live components.
Before commencing work on the product:
▶Disconnect the product from the power
supply by switching off all power supplies
at all poles (electrical partition with a con-
tact gap of at least 3 mm, e.g. fuse or cir-
cuit breaker).
▶Secure against being switched back on
again.
▶Check that there is no voltage.
1.4.3 Risk of being burned or scalded by
hot components
▶Only carry out work on these components
once they have cooled down.

1 Safety
4Installation and maintenance instructions uniSTOR 0020221302_02
1.4.4 Risk of material damage caused by
using an unsuitable tool
▶Use the correct tool.
1.4.5 Risk of material damage caused by
frost
▶Do not install the product in rooms prone
to frost.
1.4.6 Risk of injury due to the heavy weight
of the product
▶Make sure that the product is transported
by at least two people.
1.5 Regulations (directives, laws,
standards)
▶Observe the national regulations, stand-
ards, directives, ordinances and laws.

Notes on the documentation 2
0020221302_02 uniSTOR Installation and maintenance instructions 5
2 Notes on the documentation
2.1 Observing other applicable documents
▶Always observe all the operating and installation instruc-
tions included with the system components.
2.2 Storing documents
▶Pass these instructions and all other applicable docu-
ments on to the end user.
2.3 Validity of the instructions
These instructions apply only to:
Product article number
VIH GB 120/3 BES 0010019209
VIH GB 150/3 BES 0010019210
VIH GB 180/3 BES 0010019211
VIH GB 200/3 BES 0010019212
VIH GB 250/3 BES 0010019213
VIH GB 300/3 BES 0010019214
2.4 Benchmark
Vaillant is a licensed member of the Benchmark Scheme.
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 instructions by a competent person approved
at the time by the Health and Safety Executive and that it
meets the requirements of the appropriate Building Regu-
lations. The Benchmark Checklist can be used to demon-
strate compliance with Building Regulations and should be
provided to the customer for future reference.
Installers are required to carry out installation, commission-
ing and servicing work in accordance with the Benchmark
Code of Practice which is available from the Heating and
Hotwater Industry Council who manage and promote the
Scheme.
Benchmark is managed and promoted by the Heating and
Hotwater Industry Council.
For more information visit www.centralheating.co.uk
3 Product description
3.1 Serial number
1
You can find the serial number on the data plate (1), which is
located on the cylinder below the electronics box.
3.2 Information on the identification plate
The identification plate is attached to the product at the fact-
ory.
The identification plate keeps record of the country in which
the product is to be installed.
This product meets the requirements of standard EN
12897:2006.
3.3 CE marking
The CE marking shows that the products comply with the
basic requirements of the applicable directives as stated on
the declaration of conformity.
The declaration of conformity can be viewed at the manufac-
turer's site.

4 Set-up
6Installation and maintenance instructions uniSTOR 0020221302_02
3.4 Hot Water Association
Vaillant is a full member of the Hot Water Association and
promotes the scheme in association with its cylinder range.
Details are available on the web site www.vaillant.co.uk
4 Set-up
4.1 Observing the requirements for the
product's installation site
Caution.
Material damage due to frost
If the water in the system freezes, there is
a risk of damage to the domestic hot water
cylinder.
▶Install the cylinder in a dry, permanently
frost-free room.
Caution.
Material damage due to escaping water
In the event of damage, water may escape
from the cylinder.
▶Select the installation location so that, in
the event of damage, large volumes of
water can be drained safely (e.g. into a
floor drain).
Caution.
Material damage due to high load
When filled, the cylinder may damage the
ground on which it stands due to its weight.
▶Take into consideration the weight of the
filled cylinder and the load-bearing capa-
city of the floor.
▶If required, reinforce the installation area.
Select a sensible installation site and take into consideration
the routing of the pipework system.
Install the cylinder as close as possible to the heat generator
in order to minimise heat losses.
Set up the product in a suitable location in a room and, when
doing so, pay attention to the following points:
–Plan the installation of the tundish (→Page 9).
–The installation surface must be even and have sufficient
load-bearing capacity to support the operating weight of
the product.
–The installation site must be frost-free.
–Install the product in such a way that the thermostat and
immersion heater can be accessed easily.
–Leave sufficient space around the product for installing,
maintaining and replacing the expansion vessel.
To prevent heat losses, the pipework system must have heat
insulation in accordance with the applicable energy-saving
regulations.
4.2 Transport
Caution.
Risk of material damage caused by incor-
rect transport.
The components attached to the cylinder
must not be used to transport the cylinder.
Otherwise there is a risk that the cylinder
could malfunction.
▶Do not use the components attached to
the cylinder to transport it.
Always transport the unit as illustrated above.
Never transport the unit while it is horizontal.

Set-up 4
0020221302_02 uniSTOR Installation and maintenance instructions 7
4.3 Unpacking the product
1. Remove the product from its box.
2. Remove the protective film from all of the product's
components.
Caution.
Risk of material damage caused by un-
packing incorrectly.
The components could become damaged
when unpacking the product.
▶Carefully unpack the product.
3. Remove the product from its box.
4. Remove the protective film from all of the product's
components.
4.4 Checking the scope of delivery
▶Check that the scope of delivery is complete.
Quant-
ity
Designation
1 Domestic hot water cylinder
1 Enclosed documentation
1 Expansion vessel
4.5 Product dimensions,slimline
Validity: VIH GB 120/3 BES
OR VIH GB 150/3 BES
Ø 435
172
546
476
512
AB
C
Dimensions (mm)
A B C
VIH GB
120/3 BES 1,427 1,398 1,162
VIH GB
150/3 BES 1,642 1,613 1,377

5 Installation
8Installation and maintenance instructions uniSTOR 0020221302_02
4.6 Product dimensions, standard diameter
Validity: VIH GB 180/3 BES
OR VIH GB 200/3 BES
OR VIH GB 250/3 BES
OR VIH GB 300/3 BES
90°
265
154
706
Ø 595
694
A
B
C
D
Dimensions (mm)
A B C D
VIH GB 180/3
BES 1,165 840 495 380
VIH GB 200/3
BES 1,265 940 495 380
VIH GB 250/3
BES 1,535 1,210 495 380
VIH GB 300/3
BES 1,745 1,420 495 380
5 Installation
5.1 Setting up the unit horizontally
▶Align the product vertically by adjusting the adjustable
feet.
5.2 Hydraulic connection
Caution.
Risk of damage caused by heat transfer
when welding.
The heat that is transferred during welding
may damage the cylinder and its components
as well as the connection seals.
▶Protect the product and its components.
▶Do not weld the connection pieces if these
have been screwed into the pipe fittings.
Caution.
Risk of material damage by drilling
through the product.
The product may be damaged by drilling
work.
▶Do not drill through the product.
Caution.
Risk of material damage to the cylinder.
If an unvented hot water cylinder is fitted at
a high level (eg, loft space), potential dam-
age to the cylinder may occur if the correct
method of draining is not followed.
▶In certain circumstances and at the dis-
cretion of the installer, install a WRAS ap-
proved automatic air vent on the hot water
outlet at the highest point.

Installation 5
0020221302_02 uniSTOR Installation and maintenance instructions 9
5
3
2
1
4
6
7
8
9
10
11
1 Heat generator heating
return
2 Tundish
3 Safety assembly
4 Cold water inlet
5 Temperature and pres-
sure expansion relief
valve
6 Domestic hot water
outlet
7 Cylinder heating inlet
8 Heating circuit heating
flow
9 2-port motorised valve
10 Heat generator heating
flow
11 Drain valve
5.2.1 Connecting the product to the heating circuit
1. Connect the product to the heating circuit.
–Minimum diameter of the copper pipe: ≥22 mm
2. Ensure that the distance between the heat generator
and the product is as small as possible in order to pre-
vent heat losses.
5.2.2 Installing an expansion vessel
1. Install the expansion vessel close to the product.
2. Install a pipe at the expansion vessel and connect the
terminal to the safety group.
5.2.3 Connecting the installation's cold water
supply
▶Connect the cold water inlet to the safety group.
5.2.4 Installing a discharge pipe
≤ 600 mm
≥ 300 mm
D2
2
1
D1
1 Temperature and pres-
sure expansion relief
valve
2 Tundish
The drain connections of the temperature and pressure re-
lief valve and the expansion relief valve must be connected
to the supplied tundish via 15-mm-thick copper pipes. The
tundish must be installed vertically, as close to the cylinder
as possible and with a maximum clearance of 600 mm from
the connection of the temperature and pressure relief valve.
It must be installed in the same room as the cylinder, but at
a sufficient distance from electrical components. The drain
pipes from the temperature and pressure relief valve and
from the expansion relief valve can be connected above the
tundish using a T-piece. The drain pipe from the 22 mm con-
nection of the tundish must consist of copper pipes with a
diameter of at least 22 mm and be connected to a safe and
visible drainage point. The vertical section of pipe beneath
the tundish must be at least 300 mm long before any bends
or diversions in the line. If the total resistance of the drain
pipework exceeds the values in the following table, you must
increase the diameter of the pipework. When installing the
drain pipework, comply with the standards, directives and
laws that are applicable in your country.
Size of
the outlet
valve
Minimum
diameter
of the
discharge
pipe D1
Minimum
diameter
of the dis-
charge
pipe from
the tun-
dish D2
Maximum
permiss-
ible res-
istance,
inform-
ation
on the
length of
a straight
pipe
Resist-
ance per
elbow or
bend
1/2" 15 mm
22 mm
28 mm
35 mm
9 mm
≤18 m
≤27 m
0.8 m
1.0 m
1.4 m
3/4" 22 mm
28 mm
35 mm
42 mm
≤9 m
≤18 m
≤27 m
1.0 m
1.4 m
1.7 m
1" 28 mm
35 mm
42 mm
54 mm
≤9 m
≤18 m
≤27 m
1.4 m
1.7 m
2.3 m
Sample calculation
The following example corresponds to a temperature and
pressure relief valve G1/2 with a drain pipe (D2) with four 22
mm elbows and a length of 7 m from the tundish to the drain-

5 Installation
10 Installation and maintenance instructions uniSTOR 0020221302_02
age point. According to the table, the maximum permiss-
ible resistance for a straight length of a 22-mm-thick cop-
per discharge pipe (D2) of a thermal expansion relief valve
G1/2 is 9.0 m. The resistance of the four 22 mm elbows,
which are each 0.8 m in length, must be subtracted from this,
i.e. a total of 3.2 m. The maximum permitted length is ac-
cordingly 5.8 m and is therefore below the current length of
7 m. The calculation must therefore be performed using the
second largest size. The maximum permissible resistance
for a straight length of a 28-mm-thick pipe (D2) of a thermal
expansion relief valve G1/2 is 18 m. The resistance of the
four 28 mm elbows, which are each 1.0 m in length, must be
subtracted from this, i.e. a total of 4.0 m. The maximum per-
mitted length is accordingly 14 m. As the current length is
7 m, a 28 mm copper pipe (D2) should be selected.
A suitable location for the discharge pipe terminal is, for
example, beneath a fixed mesh above the odour trap in a
soakaway with a siphon. Low drain pipework, for example
up to 100 mm above external surfaces (car parks, mead-
ows, etc.) can be used provided that it is protected by a wire
fence or something similar to prevent children from coming
into contact with the waste water and provided that the sys-
tem is not visible. Do not install any valves or stopcocks on
the drain pipework.
Make sure that the discharge pipe from the tundish to the
drain has a constant downward gradient of at least 1:200.
The discharge pipe for the heat generator expansion relief
valve can be connected to the horizontal discharge pipe for
the cylinder behind the tundish using a T-piece.
5.2.4.1 High-level drain
Installing the highest drain is permitted as long as this does
not present a danger to anyone in or outside the building at
the drain point. Examples of points to consider when decid-
ing whether a location is suitable for the highest drain:
–The possibility (taking the wind into account) that a per-
son might stay in the area where the water is drained
for a prolonged period of time, and, if this is the case,
whether the water is sufficiently cooled by that point to
pose no danger. The thermal conductivity of the material
surfaces, the climatic conditions, the installation location
and the drain pipework direction can, to different extents,
contribute to reducing the temperature of the water that is
being drained.
–The position of the windows and other openings.
–The probability of prams being under the drain opening.
–The resistance of the surface to hot water.
–The possibility of ice forming if water drains onto access
paths.
5.2.5 Installing the temperature sensor for the
immersion heater
Note
The temperature sensor is used to control the
immersion heater via a multi-functional module
or a control.
Validity: Except for VIH GB 120/3 BES
OR Except for VIH GB 150/3 BES
Condition: With a multi-functional module or control
▶Secure the temperature sensor.
Validity: VIH GB 120/3 BES
OR VIH GB 150/3 BES
Condition: With a multi-functional module or control
▶Secure the temperature sensor.