Vaillant ecoTEC plus VU 6/6-5 OVZ Series User manual

For the operator
Operating instructions
ecoTEC plus
VU ..6/6-5 OVZ (H-GB)
GB, IE
Operating instructions
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone]‑0 Fax [phone]‑2810
[email protected] www.vaillant.de

Contents
2Operating instructions ecoTEC plus 0020239012_02
Contents
1 Safety ............................................ 3
1.1 Action-related warnings ................. 3
1.2 Intended use .................................. 3
1.3 General safety information............. 4
2 Notes on the documentation ...... 7
2.1 Observing other applicable
documents ..................................... 7
2.2 Storing documents......................... 7
2.3 Applicability of the instructions....... 7
3 Product description..................... 7
3.1 Serial number ................................ 7
3.2 Information on the identification
plate ............................................... 7
3.3 CE label ......................................... 8
3.4 Benchmark..................................... 8
3.5 Design of the product..................... 8
3.6 Operator control panel ................... 9
3.7 Operating concept ......................... 9
3.8 Basic display................................ 10
3.9 Operating levels........................... 10
3.10 Menu display................................ 10
4 Operation.................................... 10
4.1 Opening the isolator devices ....... 10
4.2 Opening and closing the front
flap ............................................... 11
4.3 Switching on the product ............. 11
4.4 Setting the language.................... 11
4.5 Setting the hot water
temperature ................................. 11
4.6 Setting the heating flow
temperature ................................. 11
4.7 Switching off heating mode
(Summer mode)........................... 12
4.8 Protecting the heating
installation against frost ............... 12
5 Detecting and rectifying
faults ........................................... 12
6 Calling up (Live Monitor)
status codes............................... 12
7 Care and maintenance .............. 13
7.1 Maintenance ................................ 13
7.2 Caring for the product .................. 13
7.3 Checking the condensate drain
pipework and tundish................... 13
7.4 Reading maintenance
messages .................................... 13
8 Decommissioning...................... 13
8.1 Temporarily decommissioning
the product................................... 13
8.2 Permanently decommissioning
the product................................... 13
9 Recycling and disposal............. 13
10 Guarantee and customer
service ........................................ 14
10.1 Guarantee.................................... 14
10.2 Customer service......................... 14
Appendix ............................................... 15
A Operator level –overview ......... 15
B Troubleshooting ........................ 15

Safety 1
0020239012_02 ecoTEC plus Operating instructions 3
1 Safety
1.1 Action-related warnings
Classification of action-re-
lated warnings
The action-related warnings
are classified in accordance
with the severity of the pos-
sible 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 envir-
onmental damage
1.2 Intended use
There is a risk of injury or death
to the user or others, or of dam-
age to the product and other
property in the event of im-
proper use or use for which it
is not intended.
The product is intended as a
heat generator for closed cent-
ral heating installations and for
hot water generation.
Intended use includes the fol-
lowing:
–observance of the operating
instructions included for the
product and any other system
components
–compliance with all inspection
and maintenance conditions
listed in the instructions.
This product can be used by
children aged from 8 years
and above and persons with
reduced physical, sensory or
mental capabilities or lack of
experience and knowledge if
they have been given supervi-
sion or instruction concerning
use of the product in a safe way
and understand the hazards in-
volved. Children must not play
with the product. Cleaning and
user maintenance work must
not be carried out by children
unless they are supervised.
Any other use that is not spe-
cified in these instructions, or
use beyond that specified in this
document shall be considered
improper use. Any direct com-
mercial or industrial use is also
deemed to be improper.
Caution.
Improper use of any kind is
prohibited.

1 Safety
4Operating instructions ecoTEC plus 0020239012_02
1.3 General safety
information
1.3.1 Installation by skilled
tradesmen only
The installation, inspection,
maintenance and repair of the
product, as well as the gas ratio
settings, must only be carried
out by a competent person.
1.3.2 Danger caused by
improper operation
Improper operation may present
a danger to you and others, and
cause material damage.
▶Carefully read the enclosed
instructions and all other ap-
plicable documents, particu-
larly the "Safety" section and
the warnings.
▶Only carry out the activities
for which instructions are
provided in these operating
instructions.
1.3.3 Risk of death from
escaping gas
What to do if you smell gas in
the building:
▶Avoid rooms that smell of
gas.
▶If possible, open doors and
windows fully and ensure
adequate ventilation.
▶Do not use naked flames (e.g.
lighters, matches).
▶Do not smoke.
▶Do not use any electrical
switches, mains plugs, door-
bells, telephones or other
communication systems in
the building.
▶If it is safe to do so, close the
emergency control valve or
the main isolator.
▶If possible, close the gas isol-
ator cock on the product.
▶Warn other occupants in the
building by yelling or banging
on doors or walls.
▶Leave the building immedi-
ately and ensure that others
do not enter the building.
▶Notify the gas supply com-
pany or the Emergency
Service Provider
[phone] by tele-
phone once you are outside
of the building.
1.3.4 Risk of death due to a
blocked or leaking flue
gas pipe
What to do if you smell flue gas
in the property:
▶Open all accessible doors
and windows fully to provide
ventilation.
▶Switch off the product.
▶Inform a competent person.

Safety 1
0020239012_02 ecoTEC plus Operating instructions 5
1.3.5 Risk of death due to
explosive and flammable
materials
▶Do not use or store explosive
or flammable materials (e.g.
petrol, paper, paint) in the in-
stallation room of the product.
1.3.6 Risk of death due to lack
of safety devices
A lack of safety devices (e.g.
expansion relief valve, expan-
sion vessel) can lead to poten-
tially fatal scalding and other
injuries, e.g. due to explosions.
▶Ask a competent person
to explain how the safety
devices work and where they
are located.
1.3.7 Risk of death due
to changes to the
product or the product
environment
▶Never remove, bridge or
block the safety devices.
▶Do not tamper with any of the
safety devices.
▶Do not damage or remove
any seals on components.
▶Do not make any changes:
–The product itself
–to the gas, air, water and
electricity supplies
–to the entire flue gas install-
ation
–to the entire condensate
drain system
–to the expansion relief valve
–to the drain pipework
–to constructional condi-
tions that may affect the
operational reliability of the
product
1.3.8 Risk of corrosion
damage due to
unsuitable combustion
and room air
Sprays, solvents, chlorinated
cleaning agents, paint, adhes-
ives, ammonia compounds,
dust or similar substances may
lead to corrosion on the product
and in the air/flue pipe.
▶Ensure that the supply of
combustion air is always free
of fluorine, chlorine, sulphur,
dust, etc.
▶Ensure that no chemical sub-
stances are stored at the in-
stallation site.
1.3.9 Cabinet-type casing
Enclosing the product in cab-
inet-type casing requires
compliance with the applicable
design instructions.
▶Do not fit the casing on the
product yourself.
▶If you require cabinet-type
casing for the product, consult

1 Safety
6Operating instructions ecoTEC plus 0020239012_02
an approved heating special-
ist company.
1.3.10 Risk of material
damage caused by
frost
▶Ensure that the heating in-
stallation always remains in
operation during freezing con-
ditions and that all rooms are
sufficiently heated.
▶If you cannot ensure the op-
eration, have a competent
person drain the heating in-
stallation.
1.3.11 Risk of injury and
material damage due
to maintenance and
repairs carried out
incorrectly or not
carried out at all
▶Never attempt to carry out
maintenance work or repairs
on your product yourself.
▶Faults and damage should
be immediately rectified by a
competent person.
▶Adhere to the maintenance
intervals specified.

Notes on the documentation 2
0020239012_02 ecoTEC plus Operating instructions 7
2 Notes on the
documentation
2.1 Observing other applicable
documents
▶You must observe all operating instruc-
tions enclosed with the system compon-
ents.
2.2 Storing documents
▶Keep this manual and all other applic-
able documents safe for future use.
2.3 Applicability of the
instructions
These instructions apply only to:
Product article number
Article
number
Gas Coun-
cil Number
VU 126/6-5 OVZ
(H-GB) 0010021220 41-694-13
VU 156/6-5 OVZ
(H-GB) 0010021221 41-694-14
VU 186/6-5 OVZ
(H-GB) 0010021222 41-694-15
VU 246/6-5 OVZ
(H-GB) 0010021223 41-694-16
VU 306/6-5 OVZ
(H-GB) 0010021224 41-694-17
VU 356/6-5 OVZ
(H-GB) 0020015674 41-044-76
3 Product description
3.1 Serial number
The serial number is located on a plate be-
hind the front flap. The plate is in a plastic
fish plate. You can also display the serial
number in the display.
3.2 Information on the
identification plate
The identification plate is mounted on the
underside of the product in the factory.
The identification plate keeps record of
the country in which the product is to be
installed.
Information
on the identi-
fication plate
Meaning
Barcode with serial number
Serial number For quality control purposes;
3rd and 4th digits = year of
production
For quality control purposes;
5th and 6th digits = week of
production
For identification purposes;
7th to 16th digits = product
article number
For quality control purposes;
17th to 20th digits = place of
manufacture
ecoTEC plus Product designation
2H, G20
–2 kPa
(20 mbar)
Factory setting for type of
gas and gas connection
pressure
Cat. Gas-fired boiler category
Condensing
technology
Efficiency class of the boiler
in accordance with EC Dir-
ective 92/42/EEC
Type: Xx3(x) Permissible flue gas connec-
tions
PMS Maximum water pressure in
heating mode
PMW Maximum water pressure in
hot water handling mode
V/Hz Electrical connection
W Max. electrical power con-
sumption
IP Level of protection
Heating mode
Pn Nominal heat output range
in heating mode

3 Product description
8Operating instructions ecoTEC plus 0020239012_02
Information
on the identi-
fication plate
Meaning
Pnc Nominal heat output range
in heating mode (condensing
technology)
P Nominal heat output range
in hot water handling mode
Qn Nominal heating load range
in heating mode
Qnw Nominal heating load range
in hot water handling mode
Tmax. Max. flow temperature
NOx NOx class for the product
Code (DSN) Specific product code
Read the instructions.
GC no. Gas council number
3.3 CE label
The CE label shows that the products
comply with the basic requirements of the
applicable directives as stated on the iden-
tification plate.
The declaration of conformity can be
viewed at the manufacturer's site.
3.4 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 Regulations.
3.5 Design of the product
1
2
3
1 Control elements 2 Plate with serial
number on the
rear
3 Front flap
The Benchmark Checklist can be used to
demonstrate compliance with Building
Regulations and should be provided to
the customer for future reference.
Installers are required to carry out
installation, commissioning 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

Product description 3
0020239012_02 ecoTEC plus Operating instructions 9
3.6 Operator control panel
50
1
9
8
7
6
2
3
4
1
5
1 Current heating
flow temperat-
ure, operating
mode, fault code
or additional in-
formation
2 Current assign-
ment of the right-
hand selection
button
3 Left- and right-
hand selection
buttons
4and but-
ton
5 Fault clearance
key
6 Maximum out-
put (only used
for Austria,
Germany and
Switzerland)
7 Access to the
menu for addi-
tional information
8 Current assign-
ment of the left-
hand selection
button
9 Active operating
status
3.6.1 Displayed symbols
Sym-
bol
Meaning Explanation
Burner operating
correctly
Burner on
Current burner
modulation rate
Sym-
bol
Meaning Explanation
Heating mode
active
–Permanently
on: Heating
mode heat
requirement
–Flashing:
Burner on in
heating mode
Maintenance re-
quired
Information on
the maintenance
message in the
"Live Monitor"
Summer mode
active
Heating mode is
switched off
Burner anti-cyc-
ling time is active
To avoid the
need for frequent
switching on and
off (increases the
product's working
life).
F. X X
Fault in the
product
Fault in the
product. Appears
instead of the
basic display.
3.7 Operating concept
Op-
erator
control
element
Meaning
–Cancelling the activation of an
operating mode
–Cancelling a change to a set
value
–Move up to next selection level
–Setting the heating flow tem-
perature
–Reading the system pressure
–Activating the comfort mode
–Activating the operating mode
–Confirm setting
–Move down to next selection
level

4 Operation
10 Operating instructions ecoTEC plus 0020239012_02
Op-
erator
control
element
Meaning
+
at the
same
time
Displaying the current product
status
or –Reducing or increasing the set
value
The selection buttons have a soft key func-
tion, i.e. their function can change.
If, for example, you press the left-hand
selection button in the basic display,
the current function switches from (hot
water temperature) to Back.
Adjustable values flash in the display.
You must always confirm a change to a
value. Only then is the new setting saved.
The display lights up when you switch the
product on or press a button.
If you do not press any button within one
minute, the display lighting goes out.
3.8 Basic display
50
The basic display shows the current condi-
tion of the product. If you press a selection
button, the activated function is displayed
in the display.
The functions that are available depend
on whether a controller is connected to the
product.
You can switch back to the basic display
by:
–Pressing to exit the selection levels
–Not pressing any button for longer than
15 minutes.
If there is an error message present, the
basic displays switches to the error mes-
sage.
3.9 Operating levels
The product has two operating levels.
–The end user level contains information
and setting options that you require as
the end user.
–The installer level is reserved for the
competent person. It is protected by
a code. Only competent persons may
change any settings in the installer
level.
3.10 Menu display
Menu
Live monitor
Information
Reset anti-cycl. time
Back Select
1
4
3
2
1 Scroll bar
2 Current assign-
ment of the
and buttons.
3 Selection level
list entries
4 Name of the se-
lection level
You can find an overview of the menu
structure in the appendix.
Operator level –overview (→Page 15)
4 Operation
4.1 Opening the isolator devices
1. Ask the competent person who in-
stalled the product to explain to you
where these isolator devices are loc-
ated and how to handle them.
2. Open the gas isolator cock fully.
3. Check that the heating installation flow
and return service valves are open, if
such service valves are installed.