Vaillant ecoTEC pro User manual

Operating instructions
For the operator
GB, IE
Operating instructions
ecoTEC pro
Gas fired wall hung high efficiency boiler

Table of Contents
2Operating instructions ecoTEC pro 0020129673_00
Table of Contents
1 Notes on the documentation .....................................3
1.1 Storing documents ..........................................................3
1.2 Symbols used....................................................................3
1.3 Applicability of the instructions...................................3
1.4 Identification plate........................................................... 3
1.5 CE label...............................................................................3
2 Safety.................................................................................4
2.1 Safety and warning information ..................................4
2.1.1 Classification of warnings..............................................4
2.1.2 Structure of warnings.....................................................4
2.2 Intended use......................................................................4
2.3 Basic safety instructions................................................5
3 Equipment and functional description.................... 7
3.1 Design ................................................................................. 7
3.2 Function..............................................................................7
3.2.1 Heating mode....................................................................7
3.2.2 Domestic hot water generation....................................7
4 Operation ..........................................................................8
4.1 Overview of the control elements ...............................8
4.2 Digital Information and Analysis System (DIA) ........8
4.3 Operating concept ...........................................................9
4.4 Basic display.................................................................... 10
4.5 Operating levels ............................................................. 10
5 Operation ..........................................................................11
5.1 Putting the boiler into service......................................11
5.1.1 Opening/closing the isolator devices..........................11
5.1.2 Switching on the boiler...................................................11
5.1.3 Checking the filling pressure of the heating
system................................................................................12
5.1.4 Filling the heating system ...........................................12
5.2 Setting the heating flow temperature.......................13
5.2.1 Setting the heating flow temperature without a
controller connected......................................................13
5.2.2 Using a controller to set the heating flow
temperature .....................................................................13
5.3 Domestic hot water generation...................................13
5.3.1 Setting the hot water temperature ............................14
5.3.2 Activating/deactivating Comfort mode.....................14
5.4 Setting a room thermostat or weather
compensator ....................................................................14
5.5 Switching off Heating mode (summer mode) ..........15
5.6 Temporarily shutting down the boiler .......................15
5.7 Protecting the heating system against frost ...........15
5.7.1 Activating the frost protection function...................15
5.7.2 Draining the heating system........................................16
6 Energy saving tips........................................................17
7 Troubleshooting .............................................................19
7.1 Reading fault messages ................................................19
7.2 Detecting and rectifying malfunctions.................... 20
7.3 Rectifying a water shortage....................................... 20
7.4 Resolving ignition faults................................................21
7.5 Maintenance message ...................................................21
8 Live monitor (current status of the boiler).........22
9 Service.............................................................................23
9.1 Servicing the boiler.......................................................23
9.2 Caring for your boiler ...................................................23
10 Decommissioning .........................................................24
10.1 Disposing of the boiler .................................................24
10.2 Disposing of the packaging .........................................24
11 Manufacturer's guarantee and works customer
services. ..........................................................................25
11.1 Factory guarantee..........................................................25
11.2 Vaillant Service...............................................................25
12 Glossary ..........................................................................26
Index ............................................................................................27
Brief operating instructions .....................................................31

Notes on the documentation
Operating instructions ecoTEC pro 0020129673_00 3
1
1 Notes on the documentation
The following instructions are intended to guide you
throughout the entire documentation. Other documents
apply in addition to these operating instructions.
We accept no liability for any damage caused by failure to
observe these manuals.
Other applicable documents
When operating the ecoTEC pro, you must observe all oper-
ating instructions that are included with other components
of your system.
Further instructions for all accessories and controllers used
also apply.
The benchmark check list for starting up gas-fired boilers
(contained in the installation instructions) must be com-
pleted by the competent person present during the commis-
sioning and must be passed on to the system operator.
After reading through these instructions, if you have any
questions regarding the operation of the boiler, please con-
tact your recognised approved heating specialist company
or Vaillant‘s technical department.
In these instructions, the heating specialist company and
competent person approved by the Health and Safety Exec-
utive will be abbreviated as the heating specialist company
and skilled tradesman.
1.1 Storing documents
>Store these operating instructions and all other applica-
ble documents in such a way that they are available
whenever required.
>If you move out or sell the house, pass on the documents
to the relevant person as well.
1.2 Symbols used
The symbols used in the text are explained below: Symbols
for identifying dangers are also used in these operating
instructions (¬Section2.1.1).
iSymbol that denotes useful tips and infor-
mation
>Symbol for a required action
1.3 Applicability of the instructions
These operating instructions apply exclusively to appliances
with the following article numbers:
Boiler Type designation Article number
ecoTEC pro 24 (VUW GB 246/5-3) 0010011689
ecoTEC pro 28 (VUW GB 286/5-3) 0010011690
ecoTEC pro 28 (VUW GB 286/5-3) (LPG) 0010011718
1.1 Type overview
To find out the article number of your boiler, refer to the
identification plate.
1.4 Identification plate
The identification plate of your Vaillant ecoTEC pro boiler is
attached at the factory to the underside of your boiler.
The seventh to sixteenth digits of the serial number on the
identification plate represent the article number.
The serial numbers are also located on a plate, which is
stuck behind the front flap on the underside of the boiler in
a plastic fish plate (¬ Fig. 3.1 Item 2).
1.5 CE label
The CE label shows that the boilers comply
with the basic requirements of the applicable
directives as stated on the identification plate.
iVaillant Ltd. supports the Benchmark Initiative.
A benchmark checklist for commissioning gas-
fired boilers is attached to these installation
instructions. It is very important that this docu-
ment be filled out properly when installing, com-
missioning and handing-over to the operator of
the installation.

4Operating instructions ecoTEC pro 0020129673_00
a
Safety
a2
2 Safety
2.1 Safety and warning information
>When operating your boiler, take account of the general
safety instructions and the warning notes that appear
before each action.
2.1.1 Classification of warnings
The warning notes are classified in accordance with the
severity of the possible danger using the following warning
signs and signal words:
Warning signs Signal
word
Explanation
aDanger!
Immediate 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 environ-
mental damage
2.1 Meaning of warning signs and signal words
2.1.2 Structure of warnings
Warning signs are identified by an upper and lower separat-
ing 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
2.2 Intended use
The Vaillant ecoTEC pro boilers are state-of-the-art appli-
ances which have been constructed in accordance with rec-
ognised safety regulations. Nevertheless, there is still a risk
of injury or death to the operator or others or of damage to
the boiler and other property in the event of improper use
or use for which it is not intended.
This boiler is not intended for use by persons (including
children) having limited physical, sensory or mental capaci-
ties or who have inadequate experience and/or knowledge,
unless supervised by a person responsible for their safety
or who has been given instructions from them as to how to
operate the boiler.
Children must be supervised to ensure that they do not
play with the boiler.
The boiler is intended as a heater for closed hot water/cen-
tral heating installations and for hot water generation.
The use of the ecoTEC pro in vehicles, such as mobile
homes and caravans, is not classed as intended use. Units
that are not classed as vehicles are those that are installed
in a fixed and permanent location and that do not have any
wheels (fixed installation).
Any other use, or use beyond that specified, shall be con-
sidered as improper use. Any direct commercial or indus-
trial use is also deemed to be improper.
The manufacturer or supplier is not liable for any damage
resulting from such use. The user alone bears the risk.
Intended use includes the following:
– observing the included operating, installation and main-
tenance instructions for the Vaillant product and any
other parts and components of the system
– installing and fitting the appliance in accordance with the
boiler and system approval
– complying with all of the inspection and maintenance
conditions listed in the instructions.
Caution!
Any misuse is forbidden.

Operating instructions ecoTEC pro 0020129673_00 5
aSafety a
2
2.3 Basic safety instructions
>Observe the following safety instructions at all times.
Installation and adjustment
The boiler must only be installed by a suitably qualified
competent person. The existing regulations, rules and
guidelines must be observed when doing so.
He is also responsible for inspection, maintenance and
repairs to the boiler, and alterations to the gas volume set-
ting.
Procedure in case of gas smell in buildings
Installation errors, damage, handling, an unauthorised
installation site or similar can cause gas to escape and
result in a risk of poisoning and explosion. If there is a smell
of gas in the building, proceed as follows:
>Avoid rooms that smell of gas.
>If possible, open doors and windows fully and ensure
adequate ventilation.
>Avoid the use of naked flames (e.g. lighters, matches).
>Do not smoke.
>Do not use any electrical switches, mains plugs, door-
bells, telephones or other intercommunication systems in
the building.
>Close the gas meter isolator device or the main isolator
device.
>If possible, close the gas isolator cock on the boiler
(¬ Section 5.1.1).
>Warn other occupants in the building by calling out or
banging on doors or walls.
>Leave the building.
>If you can actually hear gas leaking, leave the building
immediately and ensure that others do not enter the
building.
>Alert the police and fire brigade once you are outside
the building.
>Use a telephone outside the building to inform the emer-
gency service department of the gas supply company.
National phone number for gas emergencies:
0800 111 999
What to do in an emergency if you smell flue gas
Installation errors, damage, handling, an unauthorised
installation site or similar can cause flue gas to escape and
result in a risk of poisoning. If there is a smell of flue gas in
the building, proceed as follows:
>Open all accessible doors and windows fully and ensure
adequate ventilation.
>Switch the boiler OFF.
>Inform a heating specialist company.
Explosives and highly flammable substances
The risk of explosion arises from the flammable mixture of
gas and air. Take note of the following:
>Do not use or store explosive or highly flammable sub-
stances (e.g. petrol, paper, paint) in the same room as the
boiler.
Preventing scalding
There is a danger of scalding at the hot water draw-off
points if the hot water temperatures are greater than 60 °C.
Young children and elderly persons are particularly at risk,
even at lower temperatures.
>Select the temperature so that nobody is at risk.
Preventing material damage due to unauthorised
changes to the appliance.
Take note of the following:
>Never interfere or tamper with the boiler or other parts
of the heating installation.
>Never try to carry out maintenance work or repairs on
the boiler yourself.
>Do not damage or remove any seals on components.
Only recognised heating specialist companies are author-
ised to alter sealed components.
Material damage caused by corrosion
To prevent corrosion on the boiler and also on the flue sys-
tem, note the following:
>Do not use sprays, solvents, chlorinated cleaning agents,
paint, adhesives or similar substances in the vicinity of
the boiler.
Under adverse circumstances these substances can cause
corrosion, even in the flue system.
Preventing frost damage
If there is a power cut, or if the room temperature is set too
low in individual rooms, it cannot be ruled out that sections
of the heating installation might be damaged by frost.
>If you are going to be away during a cold period, make
sure the heating installation remains in operation and
that the rooms are sufficiently heated.
>Always observe the information on frost protection pro-
vided in ¬ Section 5.7.
Even if rooms, or the whole dwelling, are not in use for cer-
tain periods, the heating must remain in operation.
Caution!
Frost protection and monitoring devices are only active
while the boiler is connected up to the power supply. The
boiler must be connected to the power supply. The boiler
must be switched on. You can see from symbols in the dis-
play that the boiler is switched on.

6Operating instructions ecoTEC pro 0020129673_00
a
Safety
a2
Caution!
>Under no circumstances should you add frost protection
agents (or other additives, e.g. jointing compounds, cor-
rosion protection agents, etc.) to the heating water with-
out first consulting your qualified skilled tradesman. Oth-
erwise, this could result in damage to seals and dia-
phragms as well as noises during heating mode. Vaillant
assumes no liability for this or any consequential dam-
age.
Another way to protect the heating system and the boiler
from frost is to drain them. In doing so, you must ensure
that the heating system and boiler are completely drained.
>Contact your approved heating specialist company for
advice on this.
Maintaining operation with an emergency power
generator in the event of a power cut
Your recognised heating specialist company connected your
boiler to the power mains during installation.
If the power supply is cut, it is possible that parts of the
heating installation may become damaged by frost.
If you want to maintain the operation of the boiler during a
power cut using an emergency power generator, take note
of the following:
>Make sure that the technical values of this generator
(frequency, voltage, earthing) match those of the power
mains.
>Contact your approved heating specialist company for
advice on this.
Changes to the surroundings of the boiler
You must not make any changes to the surroundings of the
boiler:
>Never shut down the safety devices.
>Do not tamper with any of the safety devices.
>Do not make any changes:
– to the boiler
– to the gas, air, water and electricity supply lines,
– to the entire flue system,
– to the entire condensate drain system,
– to the expansion relief valve or the drain line and
– constructional conditions that could affect the opera-
tional reliability of the boiler
Cupboard Installation
>If you require your boiler to be fitted into a kitchen type
cupboard then please consult your approved heating
specialist company. Under no circumstances must you
enclose your boiler yourself.
Enclosing the appliance in a cupboard requires compliance
with the special design instructions. This is to ensure all
necessary access is available for all necessary future
service requirements.
What to do if there are leaks in the hot water pipes
Take note of the following:
>In the event of leaks, immediately close the cold water
stop valve in the domestic hot water pipework between
the boiler and the draw-off points.
>Have the leak repaired by your approved heating special-
ist company.
With Vaillant ecoTEC pro boilers, the cold water stop valve
is not included in the scope of delivery of your boiler.
>Ask your approved heating specialist company where
they fitted the cold water stop valve.
Preventing damage caused by low system pressure
in the heating installation
To prevent the heating installation being used when the
amount of water is too low and to therefore prevent any
subsequent damage that may be caused by this, note the
following:
>Check the filling pressure of the heating installation at
regular intervals.
>Always observe the information on filling pressure pro-
vided in ¬ Section 5.1.3.
Requirements for the installation site
It is not necessary to keep a clearance between the boiler
and combustible materials or components since, at the
nominal heat output of your boiler, the temperature on the
surface of the casing is always lower than the maximum
permissible temperature of 85°C.

Equipment and functional description
Operating instructions ecoTEC pro 0020129673_00 7
3
3 Equipment and functional description
3.1 Design
1
2
3.1 Front view of the ecoTEC pro
Key
1 Controls
2 Plate with serial number on the rear
3.2 Function
Your Vaillant ecoTEC pro is a gas-fired wall-hung high-effi-
ciency boiler, which generates heat for heating and/or
domestic hot water generation.
3.2.1 Heating mode
In heating mode, the boiler heats the hot water and sends it
through the radiators or underfloor heating of your home
(heating circuit). The hot water pumped into the heating cir-
cuit exits the boiler at a specific heating flow temperature,
emits its heat into the rooms and flows back into the boiler
once cooled to return temperature. The heating water is
then heated again.
3.2.2 Domestic hot water generation
When you open a hot water valve (sink, shower, bath, etc.),
the boiler operates automatically and supplies hot water at
a temperature set by you.
When you close the hot water tap. the boiler automatically
stops producing hot water.
If you have activated Comfort mode, the boiler supplies you
with hot water at the requested temperature without you
having to wait for the water to heat up.
iTo prevent unnecessary energy loss, do not set
the temperature higher than is required.

Operation
8Operating instructions ecoTEC pro 0020129673_00
4
4 Operation
4.1 Overview of the control elements
50
1234
5
4.1 ecoTEC pro operator control elements
1On/off button for switching the boiler on or off
2Controller (accessory)
The Digital Information and Analysis System consists
of:
3Reset button to clear certain faults
4Operating buttons
5Display
4.2 Digital Information and Analysis System
(DIA)
The ecoTEC pro boiler is equipped with a digital information
and analysis system (DIA system). It consists of a display
showing symbols and 5 operation buttons. This system pro-
vides information on the operating status of your boiler and
helps you deal with problems.
The display lights up,
– if you switch the boiler on or
– if you press a button for the DIA system when it is
switched on. At first, pressing this button does not trig-
ger any other function.
The light automatically switches off after one minute if you
do not press any button.
50
1
2
3
4
8
7
6
5
4.2 DIA system with possible symbol displays
1Display of the present heating flow temperature, the
filling pressure of the heating system, the operating
mode or a fault code
2Display of the current configuration of the right-hand
selection button (after switching on the boiler and in
the basic display: = heating)
3Left and right-hand selection buttons
4Minus and plus button
5Chimney sweep mode (for chimney sweeps only)
6Access to status of the boiler (Live monitor)
7Display of the current configuration of the left-hand
selection button (after switching on the boiler and in
the basic display: = hot water generation)
8Display of the symbols for the active operating status

Operation
Operating instructions ecoTEC pro 0020129673_00 9
4
Displayed symbols
Flame:
Permanently on: Correct burner operation; burner
on
Display of the current filling pressure of the heating
system (bar graph display).
The filling pressure must be in the mid range
between the two dotted lines.
Permanently on: The filling pressure is within the
permitted range.
Flashing: The filling pressure is outside of
the permitted range (¬ Sec-
tion 5.1.3).
Heating mode active
Permanently on: Heating mode heat requirement
Flashing: Burner on in heating mode
Hot water generation active
Permanently on: In draw-off mode before burner is
on
Flashing: Burner on in draw-off mode
Comfort mode active
Permanently on: Comfort mode is activated
Flashing: Comfort mode is active,
burner on
Maintenance required. In the "Live monitor", you
can read further information about the reason for
the service (¬ Section 8).
Additional symbols:
Summer mode active
Heating mode is switched off
Burner anti-cycling time is active
This function is used to prevent frequent on/off
operations, and therefore contributes to prolonging
the life of your boiler.
The symbol also appears if the boiler is in a waiting
period.
F.X X
Fault in the boiler. Appears instead of the basic dis-
play (¬ Section 4.4).
Example: F.10
4.3 Operating concept
You can operate the boiler using the selection buttons and
the plus/minus buttons.
Both selection buttons have a soft key function. This means
that their function may change.
45
4.3 Display after pressing the left-hand selection button
If, forexample, you press the left-hand selection button in
the basic display (¬ Section 4.4),the current function
switches from " " (domestic hot water temperature) to
"" (Back).
With the left-hand selection button :
– you can navigate directly to set the domestic hot water
temperature
– you can cancel the change to a set value or the activa-
tion of an operating mode
With the right-hand selection button :
– you can navigate directly to set the heating flow temper-
ature, to the precise value of the water pressure of the
heating system and to activate Comfort mode
– you can confirm a set value or the activation of an oper-
ating mode

Operation
10 Operating instructions ecoTEC pro 0020129673_00
4
With both selection buttons at the same time
+ :
– you can display the current status of the boiler
With the minus button or the plus button
:
– you can increase or decrease a selected set value
Adjustable values are always displayed as flashing.
You must always confirm a change to a value. Only then is
the new setting saved.
You always have the option to cancel the change to a set-
ting or the reading of a value by pressing the left-hand
selection button.
iIf you do not press any buttons for more than 15
minutes, the display returns to the basic display.
Changes that are not confirmed will not be
applied.
4.4 Basic display
50
4.4 Basic display
In the normal operating status, you can see the basic dis-
play in the display. The basic display shows the current sta-
tus of the boiler. If you press a selection button, the rele-
vant activated function is displayed in the display. If the dis-
play becomes dark, the light is first switched on by the first
press of the button. In this case, to trigger the button func-
tion, you must press the button again.
You can switch back to the basic display by:
– pressing the left-hand selection button and exiting the
selection levels
– not pressing any button for longer than 15 minutes.
Changes that are not confirmed will not be applied.
If there is a fault, a fault message will be shown instead of
the basic display.
From the basic display, you can directly change and read
the most important settings and information by pressing
the selection buttons.
The functions that are available depend on whether a con-
troller is connected to the boiler.
4.5 Operating levels
The boiler has two operating levels.
Operating levels for the operator
The operating level for the operator offers you the most
frequently used setting options that do not require any spe-
cial prior knowledge and displays the most important infor-
mation.
Operating level for the heating engineer
The operating level for the heating engineer must only be
operated with expertise and is therefore protected by a
code. This level is used by the skilled tradesman to adjust
the parameters for the boiler to the heating system.