Installation and maintenance instructions
For the competent person
Installation and maintenance instructions
ecoTEC pro
VUW
GB, IE
Table of contents
BEFORE PROCEEDING - ENSURE BOILER IS
CORRECT FOR GAS GROUP SUPPLIED!
i
Table of contents
1 Notes on the documentation .....................................4
1.1 Storing documents ..........................................................4
1.2 Symbols used ....................................................................4
1.3 Applicability of the instructions ...................................4
1.4 Identification plate ...........................................................4
1.5 CE label ...............................................................................4
1.6 Benchmark ......................................................................... 5
1.7 Type overview ...................................................................5
2 Safety .................................................................................6
2.1 Safety and warning information ..................................6
2.1.1 Classification of warnings ..............................................6
2.1.2 Structure of warnings .....................................................6
2.2 Intended use ......................................................................6
2.3 Basic safety instructions ................................................6
2.4 Important information regarding
propane-fired boilers .......................................................7
2.5 General requirements .....................................................7
2.5.1 Related documents ..........................................................7
2.5.2 Installation site .................................................................8
2.5.3 Gas supply .........................................................................9
2.5.4 Air supply ...........................................................................9
2.5.5 Compartment ventilation ...............................................9
2.5.6 Electrical supply ...............................................................9
2.5.7 Water supply Combination boilers ...............................9
2.5.8 Water circulation system................................................9
2.5.9 Pressure relief valve ...................................................... 10
2.5.10 Venting ............................................................................. 10
3 Description of the appliance ......................................11
4 Installation ......................................................................12
4.1 Accessories .......................................................................12
4.1.1 Controller ..........................................................................12
4.1.2 Installation and operation .............................................12
4.2 Scope of delivery ............................................................12
4.2.1 Unpacking the boiler ......................................................12
4.2.2 Checking the scope of delivery ...................................12
4.2.3 Disposing of the packaging ..........................................13
4.3 Transporting the appliance ..........................................13
4.4 Requirements for the installation site .......................15
4.4.1 Required minimum clearances/
installation clearances ...................................................15
4.4.2 Using installation templates .........................................15
4.5 Dimension drawing and connection
measurements .................................................................16
4.6 Wall-mounting the boiler ...............................................17
4.7 Removing/fitting the front casing ..............................17
4.8 Removing/fitting the side panel ................................. 18
5 Gas installation ..............................................................19
5.1 Preparing for installation ..............................................19
5.2 Connecting the gas pipe ...............................................19
6 Hydraulic installation ................................................ 20
6.1 Preparing for installation ............................................ 20
6.2 Connecting the hot and cold water ............................21
6.3 Connecting the heating flow and heating return....21
6.4 Low loss header ..............................................................21
6.5 Connecting the condensate discharge pipework ....21
6.6 Connecting the discharge pipe to the expansion
relief valve on the boiler ..............................................22
7 Flue gas installation ...................................................23
7.1 Air/flue gas duct .............................................................23
7.2 Flue termination .............................................................24
8 Electrical installation .................................................26
8.1 Preparing for installation .............................................26
8.2 Opening/closing the electronics box .........................26
8.3 Establishing the mains connection ............................26
8.4 Connecting the controller ............................................27
8.4.1 Fitting the controller .....................................................27
8.4.2 Connecting controllers to the electronic system ...28
8.5 Connecting additional components via VR 40 –
connecting a "2 in 7" multi-functional module ......28
8.6 Connection wiring diagram .........................................29
9 Operation ....................................................................... 30
9.1 Overview of the read-off and setting options ........ 30
9.2 Calling up the installer level ....................................... 30
10 Commissioning ...............................................................31
10.1 Switching on the boiler ..................................................31
10.2 Using test programs .......................................................31
10.3 Preparing the heating water .......................................32
10.4 Read off the filling pressure ........................................32
10.5 Filling and purging the heating installation ............32
10.5.1 Filling the heating installation ....................................32
10.5.2 Purging the heating system ........................................33
10.5.3 Flushing the system for the first time ("cold") ......33
10.6 Avoiding low water pressure .......................................33
10.7 Fill and purge the hot water system .........................33
10.8 Filling the condensate trap ..........................................33
10.9 Checking the gas setting............................................. 34
10.9.1 Factory setting ............................................................... 34
10.9.2 Checking for tightness of the flue gas
installation and flue gas recirculation ..................... 34
10.9.3 Checking the gas flow rate ......................................35
10.9.4 Checking the gas inlet working pressure .................35
2 Installation and maintenance instructions ecoTEC pro 0020129672_05
Table of contents
10.10 Carrying out a full function test.................................36
10.10.1 Checking the heating mode ........................................37
10.10.2 Checking the hot water generation ...........................37
10.11 Final flush of the heating system ("hot") ................37
11 Adapting the boiler to the heating installation 38
11.1 Diagnosis codes – Overview ....................................... 38
11.1.1 Setting the heating partial load ................................ 42
11.1.2 Setting pump overrun time and pump operating
mode ................................................................................ 42
11.1.3 Setting the maximum flow temperature ................. 42
11.1.4 Setting the return flow temperature control ......... 42
11.1.5 Burner anti-cycling time .............................................. 42
11.1.6 Setting the maintenance interval ............................. 43
11.1.7 Setting the by-pass valve ............................................ 43
11.2 Handing over the boiler to the operator .................44
12 Inspection and maintenance ................................... 45
12.1 Inspection and maintenance intervals ..................... 45
12.1.1 General inspection and maintenance instructions 45
12.1.2 Safety instructions .......................................................46
12.1.3 Checking the CO/CO
ratio and the CO2
2
concentration ................................................................. 46
12.1.4 Adjusting the CO
concentration (or the air ratio) .47
2
12.2 Inspection and maintenance work steps ................. 49
12.2.1 Filling the boiler and the heating installation ........ 50
12.2.2 Draining the boiler ........................................................ 50
12.2.3 Draining the entire heating installation ..................50
12.3 Carrying out maintenance work ................................ 50
12.3.1 Removing the compact thermal module ................. 50
12.3.2 Cleaning the heat exchanger .......................................51
12.3.3 Checking the burner ......................................................51
12.3.4 Cleaning the condensate trap .....................................52
12.3.5 Cleaning the filter in the cold water inlet ................52
12.3.6 Installing the compact thermal module ...................53
12.3.7 Checking the charge pressure of the expansion
vessel ................................................................................53
12.4 Checking the gas flow pressure ................................ 54
12.4.1 Checking CO
content .................................................. 54
2
13.2.8 Resetting the fault memory ....................................... 55
13.2.9 Overview of fault codes ............................................... 56
13.3 Running test programs .................................................57
13.4 Resetting parameters to factory settings ................57
14 Replacing components .............................................. 58
14.1 Preparing for and completing replacement work . 58
14.1.1 Preparing for replacement work ............................... 58
14.1.2 Completing replacement work ................................... 58
14.2 Replacing the burner ...................................................58
14.3 Replacing the fan or the gas valve ........................... 59
14.4 Replacing the expansion vessel................................. 59
14.5 Replacing the heat exchanger ................................... 60
14.6 Replacing the PCB and/or the display .......................61
14.6.1 Replacing either the display or the PCB ...................61
14.6.2 Replacing the PCB and the display at the same
time ....................................................................................61
15 Decommissioning .........................................................62
15.1 Temporarily shutting down the boiler ......................62
15.2 Taking the boiler permanently out of service ........62
15.3 Disposing of the boiler .................................................62
16 Guarantee and customer service ............................62
16.1 Factory guarantee ..........................................................62
16.2 Vaillant Service ...............................................................62
17 Technical data ...............................................................63
18 Glossary ......................................................................... 64
19 Appendix ........................................................................ 65
20 Benchmark Log Book ................................................. 66
21 EC declaration of conformity .................................. 68
Index .......................................................................................... 69
13 Troubleshooting ........................................................... 54
13.1 Contact Vaillant Service Solutions
(0870 6060 777) .......................................................... 54
13.2 Performing diagnostics ............................................... 54
13.2.1 Calling up Live Monitor (status codes) .................... 54
13.2.2 Status codes – Overview ............................................. 54
13.2.3 Status codes – Overview ............................................. 55
13.2.4 Service messages ......................................................... 55
13.2.5 Calling up diagnosis levels .......................................... 55
13.2.6 Reading off the fault codes ........................................ 55
13.2.7 Querying the fault memory ........................................ 55
3Installation and maintenance instructions ecoTEC pro 0020129672_05
Notes on the documentation
1
1 Notes on the documentation
The following instructions are intended to guide you
throughout the entire documentation. Further documents
apply in combination with these installation and maintenance instructions.
We accept no liability for any damage caused by nonobservance of these instructions.
Other applicable documents
> When installing the ecoTEC pro, follow all installation
instructions for the various parts and components of the
system without exception.
These installation instructions are enclosed with the various
system components as well as additional components.
> Also observe all the operating instructions included with
the system components.
1.1 Storing documents
> Pass these installation instructions and all other applica-
ble documents and, if necessary, any required aids to the
system operator.
The system operator should retain these instructions and
tools so that they are available when required.
1.2 Symbols used
The symbols used in the text are explained below:
Symbol that denotes useful tips and
information
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> Symbol for a required action
1.3 Applicability of the instructions
These installation instructions are only valid for boilers with
the following article numbers:
Boiler Type designation
ecoTEC pro 24 (VUW GB 246/5-3) 0010011689 47-044-44
Article
number
Gas
Council
Number
1.4 Identification plate
The identification plate of the Vaillant ecoTEC pro is
attached to the underside of the boiler in the factory.
The article number of the gas fired wall hung boiler can be
found in the serial number. The seventh to sixteenth numbers constitute the article number.
The serial number can also be found on the lift out badge
located at the bottom of the front casing of the boiler.
The serial number can also be shown on the display of the
boiler (¬ Operating instructions).
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.
– Directive 2009/142/EEC of the Commission with amend-
ments "Directive for Harmonisation of Legal Regulations
of the Member States for Gas Cosumption Appliances"
(Gas equipment directive)
– Directive 92/42/EEC of the Commission with amend-
ments "Directive Concerning the Efficiency of New Hot
Water Heating Boilers Fired by Liquid or Gaseous Fuels"
(Efficiency directive)
– Directive 2006/95/EC of the Council with amendments
"Directive Concerning Electrical Equipment for Use
Within Specific Voltage Limits" (Low voltage directive)
– Directive 2004/108/EC of the Council with amendments
"Directive Concerning Electromagnetic Compatibility"
The boilers comply with the type sample described in the
EC Type testing certificate.
PIN No. CE-0085CM0320
The boilers comply with the following standards:
– EN 483
– EN 625
– EN 677
– EN 55014
– EN 60335-1
– EN 60335-2-102
– EN 61000-3-2
– EN 61000-3-3
ecoTEC pro 28 (VUW GB 286/5-3) 0010011690 47-044-45
ecoTEC pro
1.1 Appliance types, article numbers and Gas Council Number
The article number of the boiler can be found on the identification plate.
28 (VUW GB 286/5-3)
(LPG)
0010011718 47-044-47
4 Installation and maintenance instructions ecoTEC pro 0020129672_05
1.6 Benchmark
Vaillant Ltd. supports the Benchmark Initiative.
You will find the Benchmark Logbook on the last pages of
this instruction manual. It is very important that this document be filled out properly when installing, commissioning,
and fully explained at hand over to the operator of the
installation. Installers should point out also the service
record section for completion following service calls to this
appliance.
Vaillant Ltd. is a licensed member of the Benchmark
Scheme which aims to improve the standards of installation
and commissioning of domestic heating and hot water systems in the UK and to encourage regular servicing to optimize safety, efficiency and performance. Benchmark is
managed and promoted by the Heating and Hot water
Industry Council.
> For more information visit www. centralheating .co .uk
Notes on the documentation
1
Vaillant supply a special self adhesive sticker on
top of the boiler for use in entering the serial
i
number details straight onto the commissioning
checklist found in the last pages of this document.
1.7 Type overview
Unit type
ecoTEC pro
24 (VUW GB 246/5-3)
28 (VUW GB 286/5-3)
1.2 Type overview
Designated country (designation in
accordance with
ISO 3166)
GB (Great Britain)
IE (Ireland)
GB (Great Britain)
IE (Ireland)
Approval
category
II
2H3P
II
2H3P
Installation and maintenance instructions ecoTEC pro 0020129672_05 5
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2
Safety
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2 Safety
2.1 Safety and warning information
> When installing the ecoTEC pro, take account of the
general safety instructions and the warning notes that
appear before all of the actions.
2.1.1 Classification of warnings
The warning notes are classified in accordance with the
severity of the possible danger using the following warning
symbols and signal words:
Warning
symbol
a
e
Signal
word
Danger!
Danger!
Warning. Risk of minor personal injury
Explanation
Immediate danger to life or
risk of severe personal
injury
Risk of death from electric
shock
a
Caution.
b
2.1 Classification of warnings
Risk of material or environmental damage
2.2 Intended use
The Vaillant ecoTEC pro boilers are constructed using stateof-the-art technology in accordance with recognised safety
rules and 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 designed to be used by persons (including
children) with limited mental and sensory capabilities or by
persons who do not have enough experience and/or knowledge, unless they are supervised by a person who is responsible for their safety or they have been instructed by him/
her about how to use 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/central 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 considered as improper use. Any direct commercial or industrial 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:
– observance of accompanying operating, installation and
maintenance instructions for Vaillant products as well as
for 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 improper use is forbidden.
2.1.2 Structure of warnings
Warning signs are identified by an upper and lower separating line and are laid out according to the following basic
principle:
Signal word!
Type and source of danger!
a
6 Installation and maintenance instructions ecoTEC pro 0020129672_05
Explanation of the type and source of
danger
> Measures for averting the danger
2.3 Basic safety instructions
> Observe the following safety instructions at all times.
European installation directive
Installation and maintenance of the appliance should only
be undertaken by a competent person (referred to in these
instructions as "competent person" or "skilled trade company", thus making these terms gender-neutral) approved
at the time by the Health and Safety executive and in
accordance with the gas safety (installation and use) regulations 1998. The existing regulations, rules and guidelines
must be observed when doing so. The competent person is
also responsible for inspection, maintenance and repairs to
the unit, as well as alterations to the gas volume setting.
Only IE: The installation must comply with the current Version of I.S.813 "Domestic Gas Installations" and the current
Building Regulations.
a
Safety
2
a
The current ETCI Regulations for installing electrical equipment must also be observed.
Installation and settings
In the following cases, the boiler must be operated only
with the front casing fitted and closed and with a completely mounted air/flue gas duct:
– starting up
– test purposes
– continuous operation,
Otherwise, under unfavourable operating conditions, injury,
death or material damage may occur.
Exclusively for test purposes such as gas working pressure
testing the boiler may be operated with the front casing
removed for short durations ONLY but must have a completely mounted air/flue gas duct.
What to do if you smell gas
Installation errors, damage, manipulation, 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 air
is circulating.
> Avoid the use of naked flames (e.g. lighters, matches).
> Do not smoke.
> Do not use any electrical switches, plugs, doorbells, tele-
phones or other communication systems in the building.
> Close the gas meter isolator device or the main isolator
device.
> If possible, close the gas stop cock on the unit.
> Warn the occupants in the building by knocking or call-
ing.
> Leave the building.
> If you can actually hear gas leaking, leave the building
immediately and ensure that no third parties enter the
building.
> Alert the police and fire brigade when you are outside
the building.
> Use a telephone outside the building to inform the gas
supply company or National Grid Transco 0800 111999.
> Do not use sprays, solvents, chlorinated cleaning agents,
paint, adhesives or similar substances in the vicinity of
the boiler.
Under unfavourable circumstances, these substances may
cause corrosion.
Material damage due to improper use and/or
unsuitable tools
The use of unsuitable tools or improper use thereof may
cause damage, such as gas or water leaks.
> When tightening or loosening threaded connections,
always use suitable open-end spanners, but do not use
pipe wrenches, extensions, etc.
2.4 Important information regarding
propane-fired boilers
Purging the liquid gas tank when installing the system:
> Before installing the boiler, make sure that the gas tank
has been purged.
The liquid gas supplier is responsible for proper ventilation
of the tank. Ignition problems can result if the tank is not
purged properly.
> In such cases, first contact the person in charge of filling
the tank.
> Also observe the information on conversion to liquid gas
in (¬ section 10.9) of this manual.
Using the correct gas type
Using the wrong gas type may cause a fault shutdown on
the boiler. Furthermore, ignition and combustion noise may
occur in the boiler.
> Only use propane gas G31.
Affix tank sticker
Affix the enclosed tank sticker (propane quality) to the tank
where it will be clearly visible, or on then cylinder cabinet
near the filler nozzle if possible.
2.5 General requirements
What to do if you smell exhaust fumes
Installation errors, damage, manipulation, unauthorised
installation sites or the like can cause flue gas to escape
and result in a risk of poisoning. If there is a smell of
exhaust fumes in the building, proceed as follows:
> If possible, open doors and windows fully and ensure
adequate ventilation.
> Switch the boiler off.
> Check the flue gas route in the boiler and the flue gas
pipes.
Material damage caused by corrosion
To prevent corrosion on the boiler and also on the air/flue
gas duct, note the following:
Installation and maintenance instructions ecoTEC pro 0020129672_05 7
2.5.1 Related documents
To ensure the safe installation and continued satisfactory
operation of your appliance, all works shall be carried out
by a competent installer fully conversant with the required
current and up to date, acts standards, laws and regulations
relevant for this range of equipment at the time of installation. In addition any special requirements of Local Authorities, gas undertakings or insurers must be complied with.
Installers shall carryout a full site risk assessment and put
into place all necessary steps and procedures to comply
with Health and safety at work act and ensure safety of
themselves and others with regard to manual handling and
working at height requirements.
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2
Safety
a
Attention shall be paid to (but not restricted to) the
following:
– Gas Safety (Installation and Use) regulations.
– All Building Regulations 2000 for England and Wales,
(as amended).
– (Includes Approved Codes of Practice and Approved Doc-
uments for building regulations e.g. L1, L1A, L1B, L8.)
– The Building Standards, Scotland, and any requirements
determined by the local authorities within.
– The current Version of I.S.813 „Domestic Gas Installa-
tions“ and the current Building Regulations for IE.
– The current ETCI Regulations for installing electrical
equipment for IE.
– BS 7671 Requirements for electrical installations.
IEE Wiring Regulations
– The Electricity at Work Regulations.
– The Water supply (water fittings) regulations 1999.
– BS 5854 Code of practice for flues and flue structures
in buildings.
– BS EN 12828 Design of water-based heating systems.
– BS EN 806 parts 1 - 5
– BS 8558
– BS 6880 Code of practice for low temperature heating
systems with outputs greater than 45 kW.
Part 1 Fundamental and design considerations.
Part 2 Selection of equipment.
Part 3 Installation, commissioning and maintenance.
– BS 6981 Installation of low pressure gas pipework of up
to 35 mm in domestic premises.
– BS 4814 Specification for: Expansion vessels using an
internal diaphragm, for sealed hot water and heating sys-
tems.
– BS 7074 Application, selection and installation of expan-
sion vessels and ancillary equipment for sealed water
systems.
Part 1 Code of practice for domestic heating and hot
water.
Part 2 Code of practice for low and medium temperature
hot water systems.
– BS 7593 Code of practice for treatment of water in
domestic hot water central heating systems
– BS EN 13831 Closed expansion vessels with built in dia-
phragm
– BS EN 14336 Heating systems in buildings. Installation
and commissioning of water based heating systems.
– BS 5440 – 1 Installation of flues and ventilation for gas
appliances of rated input not exceeding 70 kW*
– BS 5440 – 2 Flueing and ventilation for gas appliances
of rated input not exceeding 70 kW*
* 1st 2nd and 3rd family gases.
– BS EN 6
water boilers of rated input not exceeding 70 kW net
Institute of Gas Engineers Publications:
– IGE/UP/1B (Edition 2) Tightness testing and direct purg-
ing of small natural gas installations.
– IGE/UP/ 7 (Edition 2) Gas in timber and light steel
framed buildings.
– I.S. 813 – Domestic Gas Installations - 2nd edition
( Ireland)
798 Installation & maintenance of gas fired hot
– BS 5482 – Part 1 Domestic butane and propane gas
burning installations
2.5.2 Installation site
The location chosen for the boiler must permit the provision of a satisfactory flue termination. The location must
also provide adequate space for servicing and air circulation around the boiler.
Before commencement of any works the installer should
carry out a full risk assessment in accordance with Health
and Safety executive regulations.
The boiler may be installed in any room, although particular
attention is drawn to the requirements of BS 7671 (IEE Regulations), the electrical provisions of the Building Regulations (Scotland) and in IE the current edition of IS 813 and
the current ETCI rules, in respect of the installation of a
boiler in a room containing a bath or shower.
In case of installation of the boiler in an unusual location,
special procedures may be necessary and BS 5546 and
BS 6798 give detailed guidance on this aspect. The boiler
must be mounted on a flat, vertical wall, which must be sufficiently robust to take the weight of the boiler.
The boiler may be installed on a combustible wall, subject
to the requirements of the Local Authorities and Building
Regulations. A compartment used to enclose the boiler
must be designed and constructed specifically for this purpose. (An existing cupboard or compartment may be used
provided that it is modified for the purpose). Details of
essential features of cupboard/compartment design including airing cupboard installations are given in BS 6891. In IE
the current edition of IS 813.
If the boiler is to be installed in an airing
cupboard it is not required to separate the
i
boiler with a non-combustible partition. However
installation and servicing clearances must be
maintained, and the boiler kept clear of any
clothing.
Caution.
Risk of damage caused by aggressive
b
vapours and dust.
Aggressive vapours and dust in the installation room may cause corrosion damage to
the boiler and to the flue gas installation.
> Ensure that the boiler is room sealed if
the air in the installation room contains
aggressive vapours or dust.
> Observe the following when choosing the installation site
and operating the boiler,
– Do not install the boiler in rooms prone to frost.
– Do not install the boiler in rooms in which the com-
bustion air contains chemical substances, such as fluoride, chlorine, sulphur, dust, etc. (e.g. sprays, solvents, cleaning agents, paint, adhesives).
8 Installation and maintenance instructions ecoTEC pro 0020129672_05
a
Safety
2
a
> Please ensure that the boiler is room sealed or in a sepa-
rate installation room if
– the combustion air supply contains the aforemen-
tioned substances,
– you install the boiler in hairdresser salons, painter's or
joiner's workshops, cleaning businesses or similar.
> Do not route the combustion air through an old oil fur-
nace chimney, as this can also cause corrosion.
2.5.3 Gas supply
An existing gas meter should be checked to ensure that it is
capable of passing the rate of gas supply required.
Installation pipes should be fitted in accordance with
BS 6891, in IE in accordance with the current issue of
IS 813. Pipework from the meter to the boiler must be of an
adequate size.
Do not use pipes of a smaller size than the boiler gas connection. The complete installation must be tested and
purged in accordance with:
– IGE/UP /1B for systems up to 0.035 m
– for larger systems IGE/UP/1A and
– for LPG installations refer to BS 5482 - 1 or
– IGE/UP1 Edition 2 for larger volume installations.
3
capacity
2.5.4 Air supply
Detailed recommendations for air supply are given in
BS 5440: Part 2. It is not necessary to have an air vent in
the room or internal space in which the boiler is installed.
2.5.5 Compartment ventilation
The boilers are very high efficiency appliances. As a consequence the heat loss from the appliance casing during
operation is very low. Compartment ventilation is required
if the flue used is not concentric and air is supplied from
the room or compartment the boiler is installed in.
2.5.6 Electrical supply
Danger!
Risk of death from electric shock.
a
If the appliance is not earthed, it may hold
voltage if a defect occurs.
> Earth the appliance.
A 230 V, ~ 50 Hz single phase electricity supply fused to 3
Amp. must be provided in accordance with the latest edition
of BS 7671 (IEE Wiring Regulations) and any other local regulations that may apply. In IE reference should be made to
the current edition of the ETCI rules. The method of connection to the mains electricity supply must provide a
means of completely isolating the boiler and its ancillary
controllers. Isolation is preferably by the use of a fused
three pin plug and unswitched shuttered socket outlet, both
complying with the requirements of BS 1363. Alternatively,
a 3 Amp. fused doublepole switch with a 3 mm contact
opening on both poles may be used.
2.5.7 Water supply Combination boilers
Designers and installers must ensure that all pipe work and
fittings connected to the ecoTEC complies with the necessary water fittings regulations. See related documents
above (ref BS 6700 and new BSEN 806 parts 1 - 5 plus BS
8558) For combination boilers the incoming water supply
should be checked to ensure that sufficient pressure and
flow rate are available to suite the intended use, see the
technical data at the back of this manual.
All mains water heated by the ecoTEC combination boiler
will be classed as Category 2 fluid and small expansion volumes created during warm up must be allowed to flow back
into the supply pipe. No back flow prevention is necessary
with this appliance as the very small expansion volume is
unlikely to heat the incoming service pipe above 25 Deg C.
Note that where back flow prevention devices are fitted
(this may include water meters) these can prevent the permitted expansion into the cold supply. This along with the
effects of pumping and / or water hammer can result in a
pressure build-up that may cause damage to the boiler (and
other household devices such as showers). Vaillant cannot
accept responsibility for damage caused to the boiler or its
surroundings where an appliance has been fitted to supplies with mechanical back flow prevention. In these cases
the requirement would be that a competent installer correctly installs a suitable shock arrestor / mini-expansion
vessel adjacent to the boiler in the cold water supply pipe.
2.5.8 Water circulation system
Detailed recommendations concerning the water circuit system can be taken from BS 6798 and BS 5449, Part 1 (for
"Small Bore" and "Micro Bore" central heating installations). Lines which do not form part of the usable heating
surface should be insulated to prevent heat losses and possible freezing up, especially where the lines run under
rooves and ventilated cellar rooms. The drain connections
must be easily-accessible, so that the entire system including the boiler and hot water system can be drained. The
drain connections should be at least 1/2 " (BSP nominal
size) and must be in accordance with BS 2879.
The boiler is suitable for Minibore and Microbore systems.
Water lines are to be copper pipes in accordance with
BS 2871, Part 1. These must be thoroughly cleaned, especially when connecting a new boiler to an existing system.
Installation and maintenance instructions ecoTEC pro 0020129672_05 9
a
2
Safety
a
Risk of damage if the heating water is treated with
unsuitable frost or corrosion protection agents.
Frost and corrosion protection agents can cause changes to
seals, noise during heating mode and may lead to
other consequential damage.
> Do not use any unsuitable frost or corrosion protection
agents.
Mixing additives with the heating water can result in material damage. However no incompatibility with Vaillant boilers has been detected with proper use of the following
products over a long period.
> When using additives, follow the manufacturer's instruc-
tions without exception.
Vaillant accepts no liability for the compatibility of any additive or its effectiveness in the rest of the heating installation.
Additives for cleaning measures
(subsequent flushing required)
– Fernox F3
– Sentinel X 300
– Sentinel X 400
Additives intended to remain permanently in the
system
– Fernox F1
– Fernox F2
– Sentinel X 100
– Sentinel X 200
Additives for frost protection intended to remain
permanently in the system
– Fernox Antifreeze Alphi 11
– Sentinel X 500
> Inform the operator of the necessary measures if you
have used these additives.
> Inform the operator about the required measures for
frost protection.
Total heating
output
kW
< 50
> 50 to £ 200
>200 to £ 600
> 600
1) on systems with circulation water heaters and for systems with
electric heating elements
2) from the specific system volume (nominal capacity in litres/
heating output; for multiple boiler systems, the lowest individual
heating output should be used).
This data only applies up to 3 times the system volume for filling and top-up water. If 3 times the system volume figure is
exceeded, the water must be treated in exactly the same way as
if the limits quoted in table 2.2 were exceeded (softening, desalination, hardness stabilisation or desludging).
2.2 Guideline values for heating water: water hardness
Overall hardness at smallest boiler heating
2)
surface
3
1)
> 20 l/kW <
50 l/kW
3
mol/m
(mg/l CaCO3)
2
(200)
1.5
(150)
0.02
(2.0)
0.02
(2.0)
> 50 l/kW
mol/m
(mg/l CaCO3)
0.02
(2.0)
0.02
(2.0)
0.02
(2.0)
0.02
(2.0)
20 l/kW
mol/m
(mg/l CaCO3)
No require-
ment or
1)
< 3
< (300)
2
(200)
1.5
(150)
0.02
(2.0)
3
2.5.9 Pressure relief valve
The boiler is equipped with a pressure relief valve. This
safety device is required for all sealed central heating systems, is preset to 3 bar and is fitted with a 15 mm compression connection for the discharge pipe, whose diameter
must not be less than 15 mm. The pressure relief valve must
not be used for draining purposes.
For situations where the discharge cannot be easily routed
Vaillant have a remote pressure relief valve mounting kit
available which can be used to provide a suitable way to
achieve this.
Permissible water hardness
2.5.10 Venting
> Observe all valid national and technical regulations when
conditioning filling and supplementary water.
Provided the national regulations and technical standards
do not stipulate more stringent requirements, the following
applies:
The boiler is fitted with an automatic air vent. Other measures need to be taken to allow the heating system to be
either automatically or manually vented during filling and
during commissioning.
> You must condition the heating water in the following
cases:
– If the entire filling and supplementary water quantity
during the operating life of the system exceeds three
times the nominal volume of the heating installation
or
– If the limit values shown in the tables are not
observed.
10 Installation and maintenance instructions ecoTEC pro 0020129672_05
3 Description of the appliance
Design
4
Description of the appliance
5
6
3
18
17
3
2
1
7
8
9
10
11
12
13
14
16
3.1 Functional elements
Key
1 Gas valve
2 Water pressure sensor
3 Heat exchanger
4 Connection for the air/flue gas duct
5 Expansion vessel
6 Air intake pipe
7 Compact thermal module
8 Ignition electrode
9 Fan
10 Automatic air vent
11 Pressure gauge
12 Internal pump
13 Diverter valve with bypass
14 Expansion relief valve
Installation and maintenance instructions ecoTEC pro 0020129672_05 11
15 Electronics box
16 Impeller sensor (hot water)
17 By-pass valve
18 Secondary heat exchanger
15
Installation
4
4 Installation
BEFORE PROCEEDING - ENSURE BOILER IS
CORRECT FOR GAS GROUP SUPPLIED!
i
The work described in this section must only be carried out
by a competent person.
4.1 Accessories
4.1.1 Controller
To control the ecoTEC, Vaillant offers various controller versions for connecting to the switching rail or for plugging
into the operator control screen.
Room Thermostats
VRT 30 – Room Thermostat (230 V)
VRT 50 – Room Thermostat eBUS
Timers / Programmers
timeSWITCH 150 – mechanical clock
timeSWITCH 160 – 7 day programmer
Digital Room Temperature Controls
The pipes can be routed upwards behind the
boiler in front of the wall (surface installation)
i
using the spacer frame. Which means the distance between the wall and the boiler increases
by 65 mm.
4.2 Scope of delivery
The Vaillant ecoTEC pro is delivered pre-mounted in a packaging unit.
4.2.1 Unpacking the boiler
> Remove the boiler from its box.
> Remove the protective film from all parts of the boiler.
4.2.2 Checking the scope of delivery
> Check that all parts have been delivered and are intact
(¬ fig. 4.1 and ¬ table 4.2)
7
1
2
VRT 350 – Programmable Room Control
VRT 392f – RF Programmable Room Control *
VRT 350f – RF Programmable Room Control
Weather Compensating Controls
VRC 470 – Weather Compensator
VRC 470f – RF Weather Compensator
Communication
vrnetDIALOG
comDIALOG
Accessories
VR 65 – Control Centre
VR 66 – Control Centre
VR 61/2 – Two Zone Wiring Centre
VR 81/2 – Remote Control Unit
VR 68/2 – Solar Module
4.1 Controller accessories
* Note 392f RF transmitter wired external to boiler
4.1.2 Installation and operation
Optional accessories are available for use in conjunction
with the installation and operation of the ecoTEC.
The current price list shows the complete range of hydraulic
accessories for the ecoTEC pro series.
6
3
5
4
4.1 Scope of delivery
12 Installation and maintenance instructions ecoTEC pro 0020129672_05
Installation
4
Item Qty Description
1 1 Wall bracket
2 1 Boiler
3 2 Connectors (hot water, expansion relief valve)
4 4 Service valves
5 1 Installation template
6 1 Enclosure documentation
7 3 Bags with parts
1 Addition for propane boilers: tank sticker
4.2 Scope of delivery
4.2.3 Disposing of the packaging
> Dispose of the cardboard packaging used on the eco-
TEC pro at a cardboard recycling site.
> Dispose of the plastic film and plastic filling at an appro-
priate plastic recycling site.
> Observe national regulations.
4.3 Transporting the appliance
Important:
With regards to the Manual Handling Operations, 1992 Regulations, the following lift operation exceeds the recommended weight for a one man lift.
General recommendations when handling
> Clear the route before attempting the lift.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Keep load as close to body as possible. Do not
twist – reposition feet instead.
> If 2 persons performing lift, ensure co-ordinated move-
ments during lift.
> Avoid upper body/top heavy bending - do not lean
forward/sideways.
> Recommend wear suitable cut resistant gloves with good
grip to protect against sharp edges and ensure good
grip.
> Always use assistance if required.
Carriage of carton from point of delivery to point
of installation – ground floor.
Recommend 2 person lift or 1 person with use of sack truck.
> If 1 person is performing lift, straddle the load, tilt and
place carton into position on truck.
> Recommend secure appliance onto truck with suitable
straps.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Keep load as close to body as possible.
> If 2 persons performing lift, ensure co-ordinated move-
ments during lift.
> Clear the route before attempting the lift.
> If removing boiler from truck straddle the load and tilt
forwards to facilitate secure grip.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Do not twist – reposition feet instead.
> Take care to avoid trip hazards, slippery or wet
surfaces and climbing steps and stairs.
> Always use assistance if required.
Carriage of carton from point of delivery to point
of installation – first or higher floor, cellar.
Recommend 2-person lift or 1 person with use of sack truck.
> If 1 person is performing lift, straddle the load, tilt and
place carton into position on truck.
> Recommend secure appliance onto truck with suitable
straps.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Keep load as close to body as possible.
> If 2 persons performing lift, ensure co-ordinated move-
ments during lift.
> Avoid upper body/top heavy bending - do not lean
forward/sideways.
> Clear the route before attempting the lift.
> If removing boiler from truck straddle the load and tilt
forwards to facilitate secure grip.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Do not twist – reposition feet instead.
> Take care to avoid trip hazards, slippery or wet
surfaces and climbing steps and stairs.
> Always use assistance if required.
Removal of carton from delivery van
Recommend 2 person lift or 1 person with use of sack truck.
> If 1 person is performing lift, straddle the load, tilt and
place carton into position on truck.
> Recommend secure appliance onto truck with suitable
straps.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Keep load as close to body as possible.
> If 2 persons performing lift, ensure co-ordinated move-
ments during lift.
> Always use assistance if required.
Installation and maintenance instructions ecoTEC pro 0020129672_05 13
Carriage of carton from point of delivery to point
of installation – roofspace.
> Recommend 2-person lift.
> Ensure co-ordinated movements during lift.
> Avoid upper body/top heavy bending - do not lean
forward/sideways.
> Clear the route before attempting the lift.
> Take care to avoid trip hazards, slippery or wet
surfaces and climbing steps and stairs.
> When transferring appliance into roofspace,
recommend 1 person to be in roofspace to receive the
appliance and other person to be below to pass up and
support appliance.
Installation
4
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Keep load as close to body as possible.
> Always use assistance if required.
> It is assumed safe access, flooring and adequate
lighting are provided in the roof space.
> It is recommended a risk assessment of the roof space
area be carried out before moving the appliance into the
area to take into account access, stability of flooring,
lighting and other factors, and appropriate measures
taken.
Unpacking of appliance from carton.
> Recommend 2 persons unpack appliance from carton.
> Always keep working area clear.
> Recommend straps and open carton flaps, then remove
items from the top including the polystyrene packing and
remove carton by sliding up over the boiler.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs.
> Keep load as close to body as possible.
> Always use assistance if required.
> Dispose of packaging in a responsible manner.
> Recommend wear suitable cut resistant gloves with good
grip to protect against sharp edges and ensure good grip
when handling appliance outside packaging.
Positioning of Appliance for Final Installation –
no obstructions.
> If appliance weight is over 25 kg always use 2 persons to
move where practical.
> Fit bracket securely onto wall before lifting appliance
into position.
> Obtain firm grip on front and sides of appliance, lift
upwards, ensure stable balance achieved and lift
upwards to position in place on bracket.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs - when lifting load from floor
level.
> Do not twist – reposition feet instead.
> Keep boiler as close as possible to body throughout lift
to minimise strain on back.
> Ensure co-ordinated movements to ensure equal spread
of weight of load.
> Always use assistance if required.
> Recommend wear suitable cut resistant gloves with good
grip to protect against sharp edges and ensure good grip
when handling appliance.
Positioning of Appliance for Final Installation –
above worktop, foreseeable obstructions etc.
> If appliance weight is over 25 kg always use 2 persons to
move where practical.
> Fit bracket securely onto wall before lifting appliance
into position.
> Obtain firm grip on front and sides of appliance, lift
upwards, onto worktop if practicable.
> Ensure stable balance achieved and lift upwards to
position in place on bracket.
> If 2 persons positioning onto bracket obtain firm grip at
front and sides/base of boiler.
> Ensure coordinated movements during 2 person lifts to
ensure equal spread of weight of load.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs - when lifting load from floor
level.
> Do not twist – reposition feet instead.
> Keep boiler as close as possible to body throughout lift
to minimise strain on back.
> Avoid upper body/top heavy bending - do not lean
forward/sideways.
> Always use assistance if required.
> Recommend wear suitable cut resistant gloves with good
grip to protect against sharp edges and ensure good grip
when handling appliance.
Positioning of Appliance for Final Installation –
within compartment etc. restricting installation.
> If appliance weight is over 25 kg always use 2 persons to
move where practical.
> Fit bracket securely onto wall before lifting appliance
into position.
> Obtain firm grip on front and sides of appliance, lift
upwards, onto worktop if practicable.
> Ensure stable balance achieved and lift upwards to drop
into place onto bracket.
> If 2 persons positioning onto bracket obtain firm grip at
front and sides/base of boiler.
> Ensure coordinated movements during 2 person lifts to
ensure equal spread of weight of load.
> If 1 person positioning onto bracket recommend obtain
firm grip supporting base of boiler.
> Ensure safe lifting techniques are used – keep back
straight – bend using legs - when lifting load from floor
level.
> Do not twist – reposition feet instead.
> Keep boiler as close as possible to body throughout lift
to minimise strain on back.
> Always use assistance if required.
> Recommend wear suitable cut resistant gloves with good
grip to protect against sharp edges and ensure good grip
when handling appliance.
Positioning of Appliance for Final Installation – in
roof space restricting installation.
> If appliance weight is over 25 kg always use 2 persons to
move where practical.
> Obtain firm grip on front and sides of appliance, lift
upwards, ensure stable balance achieved and lift
upwards to drop into place onto bracket.
> If 2 persons positioning onto bracket obtain firm grip at
front and sides/base of boiler.
> Ensure co-ordinated movements during 2 person lifts to
ensure equal spread of weight of load.
> If 1 person positioning onto bracket recommend obtain
firm grip supporting base of boiler.
14 Installation and maintenance instructions ecoTEC pro 0020129672_05
Installation
4
> Ensure safe lifting techniques are used - keep back
straight – bend using legs - when lifting load from floor
level.
> Do not twist – reposition feet instead.
> Keep boiler as close as possible to body throughout lift
to minimise strain on back.
> Always use assistance if required.
> Recommend wear suitable cut resistant gloves with good
grip to protect against sharp edges and ensure good grip
when handling appliance.
> It is recommended a risk assessment of the roof
space area be carried out before moving the appliance
into the area to take into account access, stability of
flooring, lighting and other factors, and appropriate
measures taken.
4.4 Requirements for the installation site
4.4.1 Required minimum clearances/
installation clearances
> When using accessories, observe the minimum clear-
ances/installation clearances (¬ fig. 4.2).
It is not necessary to ensure sufficient clearance between
the boiler and combustible materials or components as the
temperature of the boiler will always be less than the maximum permissible temperature of 85 °C due to its nominal
heat output.
4.4.2 Using installation templates
An installation template is supplied with the boiler to aid
wall mounting.
The template shows the following:
– The position of the fixing holes for the hanging bracket.
– The position of the connections.
– The position of the wall breakthrough of the air/flue gas
duct.
Position the installation template vertically over the installation site.
> Attach the template to the wall, using tacks for example.
> Mark the drill holes for the hanging bracket on the wall.
> If necessary, mark the position for the wall breakthrough
for the air/flue gas duct.
> Remove the installation template from the wall.
> Drill 2 holes
> If necessary, cut the wall breakthrough for the air/flue
gas duct.
Æ 10 mm for the hanging bracket in the wall.
AB
CC
4.2 Recommended minimum clearances/installation clearances
Key
A 165 mm (air/flue gas duct Æ 60/100 mm)
246 mm (air/flue gas duct Æ 80/125 mm)
B 180 mm
C 5 mm; optimum approx. 50 mm
500 mm in front of the boiler to enable easy access for
servicing (may be provided by an opening door).
Clearance at the side is not required, but the side panels
can also be removed if there is adequate side clearance (at
least approx. 50 mm) in order to facilitate maintenance or
repair work (¬ section 4.8).
Installation and maintenance instructions ecoTEC pro 0020129672_05 15
Installation
4
4.5 Dimension drawing and connection
measurements
440
1
A
2
720
624
3
4
5
6
7
20
35 35
3 4 5
6
8
125
7
11
335
180
125
100100
4.3 Connection measurements in mm
Key
1 Wall breakthrough for air/flue gas duct
2 Hanging bracket
3 Heating flow (Æ 22 x 1.5)
4 Hot water connection (Æ 15 x 1.5)
5 Gas connection (Æ 15 x 1.5)
6 Cold water connection (Æ 15 x 1.5)
7 Heating return (Æ 22 x 1.5)
8 Air/flue gas duct connection
9 Condensate trap
10 Condensate discharge connection, Æ 19 mm
11 Heating expansion relief valve drain line connection, Æ 15 mm
Minimum dimension from wall bracket to center
line of air/flue gas duct wall breakthrough
60/100 with elbow 87°, PP 175
80/125 with elbow 87°, PP 223
4.3 Dimension A for air/flue gas duct wall breakthrough
Dimension A
[mm]
9 10
16 Installation and maintenance instructions ecoTEC pro 0020129672_05
Installation
4
4.6 Wall-mounting the boiler
Danger!
Risk of death if the load-bearing capacity
a
1
of the fixing elements used is insufficient!
If the fixing elements or wall do not have
sufficient load-bearing capacity, the boiler
can come loose and fall down. This may
also cause leaks in the gas line, which is
potentially fatal.
> When fitting the boiler, ensure that the
fixing elements and the wall have a sufficient load-bearing capacity.
> Check the quality of the wall.
4.7 Removing/fitting the front casing
2
1
2
3
4.4 Wall-mounting the boiler
> Mount the hanging bracket (1) on the wall using the wall
plugs and screws (2) provided with the unit.
> Hang the boiler (3) on the hanging bracket from above
using the hanging bracket.
4.5 Removing the front casing
Removing the front casing
> Loosen the screw (1) on the bottom of the boiler using a
screwdriver or small spanner.
> Push in both retaining clips (2) on the bottom of the
boiler so that the front casing is released.
> Pull the front casing forwards using the bottom edge.
> Lift the front casing upwards from the bracket.
Fitting the front casing
> Place the front casing on the upper brackets.
> Push the front casing onto the boiler so that until both
retaining clips (2) snap into place at the front casing.
> Fasten the front casing by screwing in the bolt (1) on the
underside of the boiler.
Installation and maintenance instructions ecoTEC pro 0020129672_05 17
Installation
4
4.8 Removing/fitting the side panel
You can also remove a side panel for installation or maintenance purposes.
Caution.
Risk of damage caused by mechanical
b
tension.
Removing both side panels may cause
mechanical distortion in the boiler, which
can cause damage to the piping and potentially result in leaks.
> Always only remove one side panel,
never both side panels at the same time.
2.
> Unscrew the two screws (2.) from the top and bottom of
the side panel.
> Hold onto the side panel (3.) when doing this.
> Swivel the side panel outwards and remove it from below
by pulling it downwards (4.).
> Install the side panel in reverse order.
3.
1.
4.
4.6 Removing/fitting the side panel
Caution
Risk of damage to the side panel.
b
Unscrewed side panels that are merely suspended from the back wall can fall down.
> Hold onto the side panel when you are
unscrewing it, and always remove it from
the boiler.
> Fold the electronics box (1.) forwards.
18 Installation and maintenance instructions ecoTEC pro 0020129672_05
5Gas installation
5 Gas installation
The work described in this section must only be carried out
by a competent person.
5.1 Preparing for installation
Danger!
Risk of death from incorrectly installed
a
a
b
gas system!
An incorrect gas installation can result in
leaks and an explosion.
> During installation, the legal directives
and the local regulations for gas supply
companies must be observed.
Danger!
Risk of death from incorrectly installed
gas system!
Tension in the gas line can result in leaks or
an explosion.
> Make sure there are no stresses in the
gas lines when it is installed.
Caution.
Risk of damage caused by incorrect gas
installation.
Excess test pressure or operating pressure
can cause damage to the gas valve.
> When the entire gas installation is tested
for leaks, the maximum pressure at the
gas valve must not exceed 0.75 kPa
(75 mbar).
5.2 Connecting the gas pipe
5.1 Fitting the gas connection
> Make the gas connection as shown.
Caution.
Risk of damage caused by contaminated
b
b
Installation and maintenance instructions ecoTEC pro 0020129672_05 19
lines.
Foreign bodies such as welding remnants,
sealing residue or dirt in the supply lines
for gas can cause damage to the boiler.
> Blow the gas line clean prior to installa-
tion.
Caution.
Risk of damage caused by using the
wrong gas type.
Using the wrong gas type can cause a fault
shutdown on the boiler. Furthermore, ignition and combustion noise may occur in the
boiler.
> Only use propane gas for propane-fired
boilers in accordance with BS 4250: Part
1 (1987).
Hydraulic installation
6
6 Hydraulic installation
The work described in this section must only be carried out
by a competent person.
6.1 Preparing for installation
Danger!
Risk of death caused by an incorrectly
a
b
b
installed system!
Heating water that leaks from the discharge
pipe of the expansion relief valve can cause
severe burns.
> Install the expansion relief valve and the
opening for the drain line in such a way
that there is no danger to any persons in
or around the building. This may be outside or to a suitable open drain in the
installation room.
> Make sure that the drain is visible.
Caution.
Risk of damage caused by contaminated
lines.
Foreign bodies such as welding remnants,
sealing residue or dirt in the water pipes
can cause damage to the boiler.
> Flush the heating installation thoroughly
prior to installation.
Caution.
Risk of damage from corrosion.
If non-diffusion-tight plastic pipes are used
in the heating installation, this may cause
air to enter the heating water and corrosion
of the heat generation circuit and the
boiler.
> If using non-diffusion-tight plastic pipes
in the heating installation, separate the
system by installing an external heat
exchanger between the boiler and the
heating installation.
Caution.
Risk of damage caused by heat transfer
b
i
The Vaillant ecoTEC boiler is equipped with an 8 l expansion vessel with a gas-side filling pressure of 0.075 MPa
(0.75 bar), which is suitable for a closed heating system
with a maximum water volume of 80 litres.
> Before installing the boiler, check whether the volume of
the installed expansion vessel is sufficient.
> If the volume of the expansion vessel is insufficient, then
install an additional expansion vessel connected as close
to the boiler as possible into the boiler return pipe.
i
Initial system pressure (in bar) 1.0 1.5
Expansion relief valve setting
(in MPa (bar))
With system volumes greater than 80 l,
multiply the volume by the adjacent factor.
when soldering.
Heat that is transferred during soldering
can cause damage to the seals in the service valves.
> Do not solder the connection pieces if
the connection pieces are screwed to the
service valves.
Seals made of rubber-like materials may be sub-
ject to plastic deformation, which can lead to
pressure losses. We recommend using seals
made of a paste-like fibre material.
When using an external expansion vessel
together with a VUW boiler, it is advisable to
install a non-return valve in the outlet (boiler
flow) or take the internal expansion vessel out of
service.
Otherwise, the warm start function may be more
frequently activated because of backflow, which
causes unnecessary energy loss.
Vessel volume
(in l)
0.3 (3.0)
0.109 0.156
Danger!
Risk of scalding and/or damage due to
a
20 Installation and maintenance instructions ecoTEC pro 0020129672_05
incorrect installation leading to leaking
water.
Stresses in the supply line can cause leaks.
> Make sure there are no stresses in the
supply lines when they are installed.
6.1 Size of an additional expansion vessel
Hydraulic installation
6
6.2 Connecting the hot and cold water
6.1 Fitting the hot and cold water connection
> Make the domestic hot and cold water connections as
shown.
> Ensure correct water pressure and flow requirements
and that any expansion can be accommodated with the
cold supply pipe work (¬section2.5.7).
6.3 Connecting the heating flow and heating
return
6.4 Low loss header
A low loss header disconnects the boiler from the heating
system. The system is no longer dependent on the remaining feed head of the boiler. In conjunction with the heating
pump, the low loss header ensures that a sufficiently high
minimum quantity of water is always circulating through
the boiler. No electrical accessories are required in order to
use a low loss header.
6.5 Connecting the condensate discharge
pipework
Danger!
Risk of death from flue gases!
a
Due to an empty or insufficiently filled condensate trap, flue gases may escape into
the room air.
> Make sure that the condensate trap is
filled with water when switching on the
boiler.
Danger!
Risk of death from flue gases!
a
If the condensate discharge pipework is
connected tightly to a fixed connection to
the waste water piping, the internal condensate trap can be drained fully.
> Do not connect the condensate discharge
pipework tightly to the waste water
piping.
6.2 Fitting the heating flow and heating return
> Make the water connections as shown.
ecoTEC pro boilers are equipped with a condensate trap
that continually deposits the contents to the discharge pipe.
1
2
3
4
a
3
Internal
stackpipe
6.3 Condensate discharge pipework
b
3
Internal
discharge system
c
6
5
Gulley
d
7
Soakaway
Installation and maintenance instructions ecoTEC pro 0020129672_05 21
Hydraulic installation
min.
180
6
> Connect the condensate discharge (1) of the boiler to a
condensate discharge pipework (3) which has a minimum
internal diameter of 19 mm (22 mm outside diameter for
all external pipes) and is made from an acid-resistant
material (e.g. plastic overflow pipe).
The condensate drain pipework must have a
continuous fall (45 mm per metre) and should
i
> During installation remove all burs from inside of cut
pipe work and avoid excessive adhesive which may trap
small pockets of water close to the pipe wall which can
freeze and build into a larger ice plug.
> As with other pipe work insulate the condensate dis-
charge pipe to minimise any risk of freezing and beware
when crossing cavities that the fall is maintained and the
pipe sleeved.
> The condensate discharge pipework must terminate in a
suitable location.
Further information can be obtained from "BS 6798 Specification for installation of gas–fired boilers of rated input not
exceeding 70 kW net". Before starting up the boiler, the
condensate trap (2) must be filled with water, as described
in the relevant section.
6.6 Connecting the discharge pipe to the
whenever possible terminate at a suitable drain
point within the heated envelope of the build-
ing that will remain frost free under long periods of low external temperatures.
expansion relief valve on the boiler
1
2
3
6.4 Fit the discharge pipe on the expansion relief valve
> Insert a seal (1) in the cap nut (2).
> Screw the discharge pipe (3) onto the expansion relief
valve.
> Make the drain line routing as short as possible and slop-
ing away from the boiler.
> Allow the line to terminate in such a way that nobody
can be injured and no cable or other electrical compo-
nents can be damaged if water or steam is ejected.
> Note that the end of the line must be visible.
> If the pipe cannot fall to a safe discharge point then the
Vaillant remote pressure relief valve mounting kit can be
used to provide a suitable way to achieve this.
> Ensure the discharge pipe work is installed, routed and
terminated correctly to minimise the risk of freezing up.
The expansion relief valve for the heating installation is
integrated in the boiler.
> Install the discharge pipe for the expansion relief valve
so that it does not interfere with the removal and fitting
of the condensate trap.
We recommend not to shorten the discharge
pipe supplied.
i
> Leave an installation space of at least 180 mm beneath
the condensate trap.
22 Installation and maintenance instructions ecoTEC pro 0020129672_05
7 Flue gas installation
7.1 Air/flue gas duct
Flue gas installation
542
7
Danger!
Risk of death and risk of damage from
a
use of non-approved air/flue gas ducts!
Vaillant boilers are certified only with genuine Vaillant air/flue gas ducts. The use of
other accessories can cause personal injury
and material damage as well as operating
faults.
> Only use genuine Vaillant air/flue gas
ducts.
The CE mark is valid only if the appliance is operated with
Vaillant air/flue gas ducts.
All ecoTEC pro boilers feature a Æ 60/100 mm diameter air/
flue gas connection as standard. Selecting the most suitable system depends on the individual installation and application conditions.
Standard 100 mm air/flue gas duct
667
87
65
74
48
1456
8 4
901
7.2 Scope of delivery for the vertical air/flue gas duct
Article number 0020060570 and 0020065937
Optional 125 mm air/flue gas duct
A concentric air/flue gas ducting with an outer diameter of
125 mm is available that can be extended depending on the
boiler output range. The flues gas spigot Ø 80/125 (with 2
measuring apertures) Art. No.: 0020147469 will be required.
You can also get a vertical system. For more information
refer to the ¬ installation manual for the air/flue gas
duct.
1020
5 1
70
30
7.1 Scope of delivery for the horizontal air/flue gas duct
Article number 303933
A concentric air/flue gas ducting with an outer diameter of
100 mm that can be extended depending on the boiler output range is available.
You can also get a vertical system. For more information
refer to the ¬ installation manual for the air/flue gas
duct. 87° elbows and 45° elbows are also available for
greater flexibility during the installation.
0 7
7.3 Scope of delivery for the horizontal air/flue gas duct
Article number 303209
1430
70
7.4 Scope of delivery for the vertical air/flue gas duct
Article number 303200
Installation and maintenance instructions ecoTEC pro 0020129672_05 23
Flue gas installation
7
7.2 Flue termination
The following details refer to all flue systems.
a. The terminal must be positioned such that the prod-
ucts of combustion can disperse freely at all times.
b. A plume of water vapour will sometimes be visible
from the flue terminal. Positions where this could be a
nuisance should be avoided.
c. If the terminal is fitted less than 2 m above a balcony,
above ground or above a flat roof to which people
have access then a suitable terminal guard must be
provided and fitted (contact Tower Flue Components,
Tonbridge, TN9 1TB).
Vertical flues must not terminate within
600 mm of an openable window, air vent or any
i
The flue system shall be so placed or shielded as to prevent
ignition or damage to any part of the building.
other ventilation terminal.
I
F
J
7.5 Termination of the air/flue gas duct
L
P
R
Q
Q
Q
B
G
A
I
I
Q
D, E
C
S
T
Q
O
H
H
N
MM
N
K
24 Installation and maintenance instructions ecoTEC pro 0020129672_05
Flue gas installation
7
Location
Directly below an opening, air brick, opening win-
A
dows, etc.
B Above an opening, air brick, opening window, etc. 300 mm
Horizontally to an opening, air brick, opening win-
C
dow, etc.
Below temperature-sensitive building components
D
e.g. plastic gutters, soil pipes or drain pipes
E Below eaves 200 mm
F Below balconies or car port roof 200 mm
G From a vertical drain pipe or soil pipe 150 mm
H From an internal or external corner 200 mm
I Above ground, roof or balcony level 300 mm
J From a surface facing the terminal 600 mm
K From a terminal facing the terminal 1200 mm
From an opening in the car port (e.g. door, win-
L
dow) into the dwelling
M Vertically from a terminal on the same wall 1500 mm
N Horizontally from a terminal on the same wall 300 mm
O From the wall on which the terminal is mounted 0 mm
P From a vertical structure on the roof N/A
Q Above intersection with roof 300 mm
Horizontally to a window or opening on pitched or
R
flat roofs
Above a window or opening on pitched or flat
S
roofs
Below a window or opening on pitched or flat
T
roofs
7.1 Position of the termination in a fan-assisted air/flue gas
duct
Minimum
dimensions
300 mm
300 mm
75 mm
1200 mm
600 mm
600 mm
2000 mm
7.6 Termination of air/flue gas duct under balcony or eaves
BS 5440–1 It is recommended that the fanned flue terminal
should be positioned as follows:
a) at least 2 m from an opening in the building directly
opposite, and
b) so that the products of combustion are not straightly
directed to discharge across a boundary.
1) Dimensions D, E, F and G:
These clearances may be reduced to 25 mm without
affecting the performance of the boiler. In order to
ensure that the condensate plume does not affect
adjacent surfaces the terminal should be extended as
shown in ¬ fig. 7.6.
2) Dimension H:
This clearance may be reduced to 25 mm without
affecting the performance of the boiler. However, in
order to ensure that the condensate plume does not
affect adjacent surfaces a clearance of 300 mm is
preferred. For IE, recommendations are given in the
current edition of IS 813.
For 1 and 2 above you can use the Variable Termination Kit
to move the termination point away from the building
fabric.
Article numbers:
0020060584 - White
0020060585 - Black
Installation and maintenance instructions ecoTEC pro 0020129672_05 25
Electrical installation
8
8 Electrical installation
8.1 Preparing for installation
Danger!
Risk of death from electric shock!
e
e
Touching live connections can cause serious personal injury.
> Switch off the power supply.
> Secure the power supply against being
switched on again.
Danger!
Risk of electrocution as a result of an
improper electrical connection!
An improper electrical connection may negatively affect the operational safety of the
boiler and result in material damage or personal injury.
> The electrical connection must be car-
ried out by a suitably qualified competent person who is responsible for complying with the existing standards and
guidelines.
> Connect the boiler in accordance with
BS 7671 (IEE Regulations).
> For IE: Please observe the latest edition
of the ETCI regulations (Electro-Technical
Council for Ireland).
> Earth the boiler.
3
4
8.1 Opening the back wall of the electronics box
> Fold the electronics box (1) forwards.
> Undo the 4 clips of the rear cover (2) of the electronics
box from the brackets (3) at the rear and sides of the
electronics box.
> Fold up the cover.
Closing the electronics box
> Close the rear panel on the electronics box.
> Push in the panel until it clicks into place in the clips.
> Fold up the electronics box.
> Push the right and left clips of the box against the side
panels on the boiler until they click into place.
> Replace the front casing on the boiler (¬ section 4.7).
1
2
8.2 Opening/closing the electronics box
Opening the electronics box
> Remove the front casing from the boiler (¬ section 4.7).
8.3 Establishing the mains connection
Danger!
Risk of death from electric shock!
e
b
Mains connection terminals L and N remain
live even if the continuous voltage on/off
switch is turned off.
> Before establishing a mains connection,
switch off the power supply.
Caution.
Risk of damage from erroneous connected voltage.
At mains voltages greater than 253 V and
less than 190 V, the functions may be
impaired.
> Make sure that the rated voltage of the
mains is 230 V.
26 Installation and maintenance instructions ecoTEC pro 0020129672_05
Electrical installation
8
Caution.
Risk of damage caused by incorrect
b
b
i
In IE, reference should be made to the current edition of
the ETCI (Electro-Technical Council for Ireland) rules.
The boiler is supplied for connection to 230 V, ~ 50Hz supply fused at 3 A rating. Connection to the mains supply
shall be made via a fused 3 pin plug to an unswitched shuttered socket, both complying with the requirements of
BS 1363. (Alternatively, connection may be made via a 3 A
fused double pole isolator having a contact opening of at
least 3 mm in all poles and supplying the boiler and controllers only). The point of connection to the mains supply must
allow complete electrical isolation of the boiler and its ancillary controllers. It should be readily accessible and adjacent
to the boiler. A flexible cord fulfilling BS6500 or comparable standard, conductor diameter between 0,75 and 1,5mm
and an allowed temperature range including 90°C should
be used.
The nominal voltage of the mains must be 230 V; at mains
voltages greater than 253 V and less than 190 V the functions may be impaired.
> Open the electronics box (¬ section 8.2).
> Use a normal commercial mains connection cable that is
compliant with standards.
> Route the mains connection cable through the left cable
duct (¬ fig. 8.1, pos. 4) on the base of the boiler.
installation.
A mains voltage at the incorrect plug terminals on the ProE system can destroy the
electronics.
> Only connect the mains connection cable
to the terminals marked for the purpose.
Caution.
Risk of damage caused by incorrect
installation.
Connecting wires that have been stripped
too far can cause short circuits and damage
the electronics if a strand accidentally
comes loose.
> Only strip the outer sheathing of flexible
cables for a maximum of 3 cm to prevent
short circuits.
> Lay the lines correctly.
> Use strain reliefs.
If you install the boiler in safety area 2, it can
only be operated if it is room sealed. Installation
method B53P is not permitted in this case.
Observe the latest edition of the "IEE Wiring
Regulations – BS7671, Requirements for Electrical Installation".
1
3
8.2 Cable routing of the mains connection cable
> Use the strain reliefs (1).
> Shorten the mains connection cable as necessary.
> Only strip the outer sheathing of flexible cables to a
maximum of 3 cm.
> Ensure inner conductor insulation is not damaged during
stripping of outer sheathing.
> Only strip inner conductors sufficient to make good
sound connections.
> Fit the stripped ends of the conductors with crimp pin
terminals to ensure a secure connection free from loose
strands to prevent short circuits.
> Take the turquoise ProE plug (2) for the mains connec-
tion out of the bracket in the electronics box and connect the plug professionally to the mains connection
cable.
> Insert the ProE plug into the corresponding PCB slot
(L, N and earth) (3).
> Lay the lines correctly.
> Secure the cable in the electronics box using the strain
reliefs.
> Close the electronics box (¬ section 8.2).
2
Make sure that the connection cables are
securely fastened to the plug terminals.
i
8.4 Connecting the controller
8.4.1 Fitting the controller
> Fit the controllers in accordance with the relevant oper-
ating and installation instructions.
2
Installation and maintenance instructions ecoTEC pro 0020129672_05 27
Electrical installation
8
8.4.2 Connecting controllers to the electronic
system
Caution.
Risk of damage caused by incorrect
b
b
installation.
Connecting wires that have been stripped
too far can cause short circuits and damage
the electronics if a strand accidentally
comes loose.
> Only strip the outer sheathing of flexible
cables for a maximum of 3 cm to prevent
short circuits.
> Lay the lines correctly.
> Use strain reliefs.
Caution.
Risk of damage caused by incorrect
installation.
A mains voltage at the incorrect plug terminals on the ProE system can destroy the
electronics.
> Do not connect a mains voltage to the
eBUS terminals (+/-).
Make sure that the conductors are securely fas-
tened to the plug terminals of the ProE plug.
i
> Open the electronics box (¬ section 8.2).
> Route the supply lines of the components to be con-
nected (e.g. external controllers, external sensors)
through the left cable duct (¬ fig. 8.1, pos. 4) on the
underside of the boiler.
> Use the strain reliefs provided.
> Shorten the supply lines as necessary.
> Only strip the outer sheathing of flexible cables to a
maximum of 3 cm.
> Ensure inner conductor insulation is not damaged during
stripping of outer sheathing.
> Only strip inner conductors sufficient to make good
sound connections.
> Fit the stripped ends of the conductors with crimp pin
terminals to ensure a secure connection free from loose
strands to prevent short circuits.
> Connect the ProE plug to the supply lines of the control-
ler using a screwdriver.
> Insert the ProE plug into the associated PCB slot
(¬ fig. 8.3).
> Lay the lines correctly.
> Secure the cable in the electronics box using the strain
reliefs.
> If you connect a 230V AC time and temperature control
to the boiler, then remove the bridge at input 24V = RT
(X100 or X106) if a bridge exists.
> If you connect a weather compensator or room tempera-
ture control via eBUS, then bridge input 24V = RT (X100
or X106) if no bridge exists.
> I If using low voltage (24V) controls connect these in
place of the bridge marked RT 24V (X100 or X106).
> Close the electronics box (¬ section 8.1).
> In order to achieve pump operating mode "Comfort"
(continuously running pump) for multi-circuit controllers,
change diagnosis code D.018 Pump operating mode
from 3 =
(¬ section 11.1.2).
i
8.5 Connecting additional components via
b
You can connect additional components to the ecoTEC pro
using the Vaillant multi-functional module 2 in 7 (accessories).
> Fit the components in accordance with the correspond-
ing operating and installation instructions.
> Select diagnostic code "D.027" to actuate relay 1 on the
multi-functional module at installer level (¬ section 11.1).
> Select diagnostic code "D.028" to actuate relay 2 on the
multi-functional module at installer level (¬ section 11.1).
The following components can be actuated:
1 = Circulation pump
2 = External pump
3 = Cylinder charging pump
4 = Extractor hood
5 = External solenoid valve
6 = External fault message
7 = Solar pump (not active)
8 = Remote control eBUS (not active)
9 = Legionella protection pump (not active)
10 = Collective solar valve (not active)
"Eco" (intermittent pump) to 1 = "Comfort"
Please note that the bridge at the ProE plug
(Burner off) must be removed when connecting
a maximum thermostat (contact thermostat) for
underfloor heating.
VR 40 – connecting a "2 in 7" multifunctional module
Caution.
Risk of damage caused by incorrect
installation.
Connecting wires that have been stripped
too far can cause short circuits and damage
the electronics if a strand accidentally
comes loose.
> Only strip the outer sheathing of flexible
cables for a maximum of 3 cm to prevent
short circuits.
> Lay the lines correctly.
> Use strain reliefs.
28 Installation and maintenance instructions ecoTEC pro 0020129672_05
8.6 Connection wiring diagram
X51
Display
Connection
Electrical installation
8
24 V
230 V~
X2
blue
X20
pink
X41
Edge
connector
X106
8
17
7
18
14
13
11
3
2
6
4
12
orange
1
2
3
M
4
5
6
Diverter valve
1
Water pressure
3
sensor
4
1
2
Impeller sensor
3
Warm start sensor
J
5
1
5
7
8
7
12
13
2
15
16
4
red
blue
+
Safety fuse
Gas valve
J
J
Flow sensor
Return sensor
3
17
45
12
PWM
Earth
+ 24 V
FB
6
AF
RF
DCF
0
1
0
Burner
off
RT
24
Bus
+
Circulation pump remote control
External sensor
Flow sensor (optional)
DCF connection
Earth
Earth
Contact thermostat/burner off
24 V DC room thermostat
Bus connection
(Controller/room th. digital)
Hall signal
Fa n
X18
green
L
N
Internal pump *
Ignition
Ignition
transformer
X1
turquoise
RT
L
N
No function *
230 V AC room thermostat *
Mains connection
Appliance earth
8.3 Wiring diagram for the ecoTEC pro electronics box
Installation and maintenance instructions ecoTEC pro 0020129672_05 29
electrode
* ... variant-dependent
Operation
9
9 Operation
The Vaillant ecoTEC pro boiler is fitted with a digital information and analysis system (DIA). You can use the DIA to
display the current status of your boiler (Live monitor) and
fault codes, to view and change parameters and to start
test programs.
The operating concept and operation of the boiler is
described in the ¬ operating instructions for the boiler.
The read-off and setting options for the installer level are
also described in the ¬ operating instructions.
You can find further read-off and setting options in ¬ sec-
tion 13.2.1.
The following overview shows the read-off and setting facilities of the installer level.
9.1 Overview of the read-off and setting
options
S.31
Code
D.---
PF
P.--
DF
9.2 Calling up the installer level
Caution.
Risk of damage caused by incorrect
b
Installer level is secured against unauthorised access with
a password, as incorrect parameter settings at this level
can cause functional faults and damage to the heating
installation.
> Press the left
The Live monitor is shown in the display (current status of
the boiler).
> Press the right selection button
menu point.
"Code" and the value "00" appear in the display.
> Select the value 17 (code) using the minus button
> Press the right selection button
the entered code.
You are at the installer level. The diagnostic codes are
shown in the display.
Use the left-hand selection button
– to cancel the change to a set value.
– to return to the basic display.
Use the right-hand selection button
– to access the test programs (P), to access the fault codes
(F) and to return to the diagnostic codes (D).
– to confirm a set value or the start of a test program.
i
handling.
Incorrect settings at installer level can
cause damage to the heating installation.
> You should only access installer level if
you are an approved competent person.
and right selection buttons
("i") at the same time
to select the
or the plus button .
to confirm
:
:
If you exit the installer level and then access it
again within 15 minutes, you do not have to
enter the code again.
--/--
DP
9.1 Overview of the read-off and setting options for the
installer level
30 Installation and maintenance instructions ecoTEC pro 0020129672_05
Commissioning
10
10 Commissioning
At the time of commissioning, complete all relevant sections of the benchmark checklist found within the back
pages of this document.
Ensure that the filling and purging programs P.06 and P.00
have been allowed to run fully before the boiler is ignited
for the first time.
Danger!
Risk of poisoning and burns caused by
a
i
Auxiliary service equipment:
The following test and measuring equipment is required for
commissioning:
–CO
– Digital or U-tube manometer
escaping hot flue gas!
Hot flue gas can escape and cause poisoning and burns if the boiler is operated with
an incompletely mounted or open air/flue
gas duct or if the boiler is operated with
internal leaks with the front casing open.
> Operate the boiler
- for commissioning
- for testing purposes
- in continuous operation
only when the front casing is fitted and
closed and the air/flue gas duct is completely fitted.
> Exclusively for test purposes such as gas
working pressure testing the boiler may
be operated with the front casing
removed for short durations ONLY but
must have a completely mounted air/flue
gas duct.
The automatic air vent cap must be released
before filling the heating circuit or recharging
circuit and during operation.
Purge the heating circuit or the recharging circuit using the purge program P.00
(¬ section 10.2).
measuring instrument
2
By activating various test programs, you can trigger special
functions on the boilers.
The following four test programs are available:
Display Meaning
1)
P.00
P.01 Maximum load test program:
P.02 Minimum load test program:
P.06 Filling mode test program:
10.1 Overview of the test programs
1)
Purging the heating circuit:
Purging the hot water circuit:
i
To terminate the test programs, you can press the left-hand
selection button "
Purging test program
The heating circuit and the hot water circuit are purged
using the automatic air vent (the cap of the automatic
air vent must be released).
1 x right selection button: Start heating circuit purging
2 x right selection button ("
3 x right selection button ("
1 x left selection button ("Cancel"): Exit purging pro-
The internal pump is cyclically actuated.
Note: The purge program runs 7.5 min per circuit.
The boiler is operated at maximum heat input after successful ignition.
The boiler is operated at minimum heat input after successful ignition.
The diverter valve (VUV) is moved to the mid-position.
The burner and pump are switched off (to fill or drain
the boiler).
Diverter valve in heating position, actuation of internal pump
for 9 cycles: 30 sec. on, 20 sec. off. Display: "Active heating circuit".
After the above-mentioned cycles have run or the right-hand
selection button has been pressed again: Diverter valve in the
hot water position, actuation of the internal pump as above.
Display: "Active hot water circuit".
If you do not press a button for more than
15 minutes. the test programs are stopped automatically. The boiler switches to normal operating mode.
" ("Back", "Cancel") at any time.
-> "): Start purging
hot water circuit
-> "): Restart heating
circuit purging
gram
10.1 Switching on the boiler
> Press the on/off button (¬ Operating instructions).
The basic display appears on the display.
10.2 Using test programs
You can call up the test programs for the commissioning
(¬ section 9.2).
Installation and maintenance instructions ecoTEC pro 0020129672_05 31
10.1 Boiler in error condition
P. 0 0
1,0 bar
Commissioning
10
If the boiler is in error condition, you cannot
start any test programs. You can detect an error
i
10.3 Preparing the heating water
Pay attention to the specifications concerning heating
water preparation in (¬ section 2.5.7).
10.4 Read off the filling pressure
The boiler is equipped with an analogue pressure gauge
(¬ fig. 3.1) and also has a symbolic bar display for the filling
pressure of the heating system and a digital pressure and
temperature display.
You can see the pressure gauge once you have removed
the front casing of the boiler.
Press the right selection button twice to read off the digital
filling pressure value.
10.5 Filling and purging the heating installation
b
condition by the fault symbol shown in the left
bottom corner of the display (¬ fig. 10.1). You
must first reset.
Caution.
Risk of damage caused by contaminated
lines.
Foreign bodies such as welding remnants,
sealing residue or dirt in the water pipes
can cause damage to the boiler.
> Flush the heating installation thoroughly
prior to commissioning.
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering the heating installation.
> Remove the front casing from the boiler (¬ section 4.7).
1
10.2 Automatic air vent
> Release the cap of the automatic air vent (1) by up to
two rotations.
> Open all thermostatic radiator valves.
The ecoTEC pro purges the heating circuit inde-
pendently during continuous operation via the
i
> Select test program P.06 (¬ section 10.2).
The diverter valve moves to the mid-position, the pumps do
not run and the boiler does not switch to heating mode.
automatic air vent.
The system is filled via a customer-installed filling connection, which must be attached in a suitable position in the
heating circuit. This connection must be removed again
after the filling process is complete. If the local Water
Authority regulations do not allow temporary connection a
sealed system filler pump with break tank must be used.
The heating system will not be filled automatically from the
domestic hot water side. (Alternative methods of filling
sealed systems are given in BS 5449)
To ensure the correct operation of the heating installation,
the indicator on the pressure gauge must point to the
upper half of the grey area or in the middle of the bar
graph display (marked by the dashed limit value) when the
heating installation is cold. This corresponds to a filling
pressure of between 0.1 MPa and 0.2 MPa (1.0 bar and
2.0 bar).
You can display the exact filling pressure (¬ section 10.4).
32 Installation and maintenance instructions ecoTEC pro 0020129672_05
10.5.1 Filling the heating installation
Ensure that the filling and drainage cock on the
heating installation is connected to a cold water
i
> In order to fill the heating installation, first open the cold
water valve.
> Open all thermostatic radiator valves.
> Check that both service valves on the boiler are open.
> Slowly open the stop valve on the filling line so that the
water flows into the heating system.
valve as per standard.
Commissioning
10
If the water pressure in the heating system is
too low, the display switches between fault mes-
i
> Purge the lowest radiator until water flows out of the
purging valve without bubbles.
> Purge all other radiators until the entire heating system
has been filled with water. Close all purging valves.
> Use the display to monitor the rising filling pressure in
the heating installation.
> Top up with water until the pressure gauge display is in
the middle of the grey area and the required filling pressure appears on the display.
> After filling, close the stop valve at the filling line and the
cold water valve.
> Check all connections and the entire system for leaks.
10.5.2 Purging the heating system
> To purge the heating installation, select test program
P.00 (¬ section 10.2).
The boiler does not start up, the internal pump operates
intermittently and, as an option, purges the heating circuit
or the hot water circuit. The display shows the filling pressure of the heating installation.
sage F.22 and the display of the current pressure
when the boiler is switched on.
remove the contamination caused during installation out
of the heating system before the boiler is started up.
> Close the drain cocks.
> Refill the heating system with water, as described in
(¬ section 10.5).
> Check that the expansion relief valve of the heating sys-
tem is functioning correctly by turning the handle on the
valve.
> Check the pressure in the heating system and top up
with water if necessary.
> Close the filling valve and the cold water valve.
10.6 Avoiding low water pressure
To prevent damage to the heating installation caused by
low water pressure, the ecoTEC pro is fitted with a water
pressure sensor.
If the water pressure falls below 0.08 MPa (0.8 bar), the
boiler indicates low pressure by displaying a flashing pressure value.
If the water pressure falls below 0.05 MPa (0.5 bar), the
boiler switches off.
The fault message F.22 appears in the display.
> Top up the water and switch the boiler on again.
A flashing pressure value appears on the display until a
pressure of 1.1 bar or higher has been reached.
> The filling pressure of the heating system must not fall
below 0.08 MPa (0.8 bar) when purging is in progress as,
otherwise, this will not be carried out properly.
The test program P.00 runs for 7.5 minutes per circuit.
At the end of the filling procedure, the filling pressure of
the heating installation should be at least 0.02 MPa
(0.2 bar) above the counterpressure of the expansion vessel
³ P
(P
Installation
> If there is still too much air in the heating installation at
the end of test program P.00, repeat the test program.
> Check all connections for leaks.
10.5.3 Flushing the system for the first time
i
> Check whether all thermostatic radiator valves and both
service valves on the boiler are open.
> Connect a hose to the drain valve that is located at the
lowest position in the heating system.
> Open the drain cocks and all the purging valves on the
radiators so that the water flows quickly and completely
out of the heating system and the boiler, in order to
+ 0.02 MPa (0.2 bar)).
Exp
("cold")
The entire heating system must be flushed
through completely at least twice: once cold and
once hot, in accordance with the following
instructions.
If you notice frequent drops in pressure, then
determine and eliminate the cause, i.e water
i
10.7 Fill and purge the hot water system
> Open the cold water stop valve on the boiler.
> Fill the hot water system by opening all the hot water
draw-off points until water comes out.
As soon as water comes out of all the hot water draw-off
points, the hot water circuit is filled completely and also
purged.
10.8 Filling the condensate trap
a
leaks in the system. Failure to do so along with
frequent topping up will result in system corrosion and subsequent failures.
Danger!
Risk of poisoning from escaping flue gas!
An empty or insufficiently filled condensate
trap may allow flue gas to escape into the
room air.
> Fill the condensate trap with water
before starting up the boiler.
Installation and maintenance instructions ecoTEC pro 0020129672_05 33
Commissioning
10
1
10.3 Filling the condensate trap
> Remove the lower part (1) of the condensate trap by
turning the bayonet fitting anti-clockwise.
> Fill the lower section with water until about 10 mm below
the upper edge.
> Re-attach the lower section to the condensate trap.
10.9 Checking the gas setting
10.9.1 Factory setting
Caution!
An incorrect gas group setting can cause
b
operating faults or a reduction in the
working life of the boiler.
If the boiler version does not correspond to
the local gas group, there will be malfunctions or you have to change components of
the boiler ahead of schedule, e. g. do not
use a LPG boiler on natural gas.
> Before starting up the boiler compare
the details of the gas group specified on
the identification plate with the gas
group supplied at the installation site.
> You must not start up the boiler yourself.
If a gas conversion to liquid gas has been carried
out by Vaillant Service Solutions, the smallest
i
The combustion of this boiler has been checked, adjusted
and preset at the factory for operation on the gas group
defined on the identification plate. No measurement of the
combustion is necessary to set up the boiler.
Do not adjust the gas valve.
> Ensure
To further validate the integrity of the flue system and confirm correct operation of the boiler it is possible to conduct
flue gas and air measurements on this boiler - for details
see ¬ section 10.9.2.
Proceed to put the boiler into operation as follows:
> Check the maximum gas flow rate as detailed in
¬ section 10.9.3.
> Check the gas inlet working pressure as detailed in
¬ section 10.9.4.
> Note that you must re-measure the gas flow rate or the
gas inlet working pressure, if changes were required to
correct any issues found.
10.9.2 Checking for tightness of the flue gas
> Check the integrity off the flue gas installation according
to TB 008.
> Should the flue gas installation be longer than 2 m we
strongly recommend to check the system for flue gas
recirculation as described below.
possible partial load is higher than is shown in
the display. The current values can be found in
the technical data (¬ section 17).
– that the boiler has been installed in accordance with
these instructions,
– the integrity of the flue system and the flue seals, as
described in the ¬ flue installation instructions
enclosed with this boiler, and as described below,
– a visual check is carried out on the boiler combustion
circuit and the relevant seals,
– that any defects have been corrected at this stage.
installation and flue gas recirculation
If the boiler version corresponds to the local gas
family:
> Proceed as described below.
If the boiler version does not correspond to the
local gas family:
> Call Vaillant Service Solutions (0870 6060 777); Gas
conversions must only be carried out by Vaillant Service
Solutions.
34 Installation and maintenance instructions ecoTEC pro 0020129672_05
Commissioning
– terminating test program P.01 as described in ¬ sec-
tion 10.2.
1
– Allow the boiler to cool down by turning off water
taps and allow pump overrun to operate for a
minimum of two minutes.
> Record the boiler maximum gas flow rate onto the
Benchmark gas boiler commissioning checklist.
10
2
10.4 Flue gas and air measure points
Legend:
1 Flue gas measure point
2 Air measure point
For checking the system for recirculation use the air measure point (2).
> Use the flue gas analyser.
> If you detect any CO or CO
in the fresh air, search for
2
the flue gas leakage or recirculation.
> Correct the defects.
> Check again as described before, if there is any CO or
in the fresh air.
CO
2
> If you cannot correct the defects you must not start up
the boiler.
10.9.3 Checking the gas flow rate
The boiler is fitted with a multifunctional automatic gas
valve which ensures that the precise air/gas ratio is provided under all operating conditions. The gas flow rate has
been set during production and does not require adjustment. With the front casing fitted check the gas flow rate of
the boiler as follows:
> Start the boiler by activating the test program P.01 as
described in ¬ section 10.2.
> In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermo-
stat.
> Alternatively, fully open the hot water taps to ensure full
flow rate through the boiler.
> Wait at least 5 minutes until the boiler has reached its
operating temperature.
> Ensure that all other gas appliances in the property are
turned off.
> Measure the gas flow rate at the gas meter.
> Check that the gas flow rate is as stated in ¬ table 10.2.
Nominal net
heat output
in kW
18.5 2.02 2.12 1.82 1.48 1.56 1.34
23 2.50 2.63 2.25 1.84 1.93 1.66
24 2. 61 2.74 2. 35 1 .92 2.02 1.73
28 3.10 3.26 2.79 2.25 2.36 2.03
10.2 Gas flow rates
Gas flow rate (as per BS EN 483)
Natural gas in m
nomi-
+ 5 % - 10 %
nal
3
/h Propane in kg/h
nomi-
+ 5 % - 10 %
nal
10.9.4 Checking the gas inlet working pressure
> Ensure that the gas inlet working pressure can be
obtained with all other gas appliances in the property
working.
> Remove the front casing from the boiler (¬ section 4.7).
> Close the gas isolation valve of the boiler.
1
If the measured gas flow rate lies outside the tolerance limits specified in ¬ table 10.2, do not operate the boiler and
2
inform the Vaillant Service Solutions (0870 6060 777).
If the measured gas flow rate is within the tolerance limits
shown in ¬ table 10.2, then proceed as follows:
> Take the boiler out of operation by
Installation and maintenance instructions ecoTEC pro 0020129672_05 35
10.5 Measuring the gas inlet working pressure
Commissioning
10
> Undo the sealing screw of the measuring nipple (1) (left-
hand screw) at the gas valve using a screwdriver.
> Connect a digital pressure gauge or U-tube manometer
(2) to the measuring nipple (1).
> Open the gas isolation valve of the boiler.
> Start the boiler by activating the test program P.01 as
described in ¬ section 13.3.
> In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermostat.
> Alternatively, fully open the hot water taps to ensure full
flow rate through the boiler.
> With the boiler operating at full load check that the gas
inlet working pressure at the reference test point (1)
complies with the requirements of ¬ table 10.3.
> Should the pressure recorded at the reference test point
in the boiler be lower than indicated (¬ table 10.3) check
if there is any blockage in the pipework or if the pipework is undersized.
If the supply pressure is out of tolerance contact your
Emergency Service Provider.
If the gas inlet working pressure at the reference test point
(1) is not within the permissible range and you cannot correct the failure, notify the gas supply company or the
Vaillant Service Solutions (0870 6060 777) and proceed as
follows:
> Take the boiler out of operation by
– terminating test program P.01 as described in
¬ section 10.2.
– Allow the boiler to cool down by turning off water
taps and allow pump overrun to operate for a
minimum of two minutes.
> Close the gas isolation valve of the boiler.
> Remove the pressure gauge and retighten the sealing
screw (1) for the measuring nipple.
> Turn on gas at the gas isolation valve.
> Make sure that there is no leakage at the sealing screw.
> Turn off gas at the gas isolation valve.
> Put the front casing back on.
> Turn off electrical supply to the boiler.
> You must not start up the boiler.
> Record the appliance gas inlet working pressure (kPa
resp. mbar) in the Benchmark gas boiler commissioning
checklist.
Natural gas (G20) LPG (G31)
Boiler
24 1.3 (13) 2.3 (23) 2.3 (23) 4.3 (43)
28 1.3 (13) 2.3 (23) 2.3 (23) 4.3 (43)
10.3 Gas inlet working pressure at the reference test point
Minimum
pressure at
reference
test point in
kPa (mbar)
Maximum
pressure at
reference
test point in
kPa (mbar)
Minimum
pressure at
reference
test point in
kPa (mbar)
Maximum
pressure at
reference
test point in
kPa (mbar)
10.10 Carrying out a full function test
> After completing the installation and the gas setting,
perform a complete function check of the boiler before
starting up the boiler and handing it over to the operator.
> Start up the boiler in accordance with the relevant oper-
ating instructions.
If the gas inlet working pressure is
within the permis
sible
range, proceed as follows:
> Take the boiler out of operation by
– terminating test program P.01 as described in
10.6 Checking for leaks
¬ section 10.2.
– Allow the boiler to cool down by turning off water
taps and allow pump overrun to operate for a
minimum of two minutes.
> Close the gas isolation valve of the boiler.
> Remove the pressure gauge and retighten the sealing
screw (1) for the measuring nipple.
> Open the gas isolation valve of the boiler.
> Make sure that there is no leakage at the sealing screw.
> Check the gas supply line, the flue gas installation, the
heating installation and the hot water pipes for leaks.
> Check the air/flue gas duct for correct installation.
> Make absolutely sure that the front casing is properly
fitted.
> Check the heating mode (¬ section 10.10.1)
> Check the operation of the hot water generation
(¬ section 10.10.2)
> Put the front casing back on.
> Reset boiler controls for normal operation.
36 Installation and maintenance instructions ecoTEC pro 0020129672_05
Commissioning
10
You can display the current operating condition of the
boiler in the "Live monitor" on the boiler display
(¬ section 13.2.1).
10.10.1 Checking the heating mode
> Switch on the boiler.
> Make sure that there is a heat requirement.
> Activate the Live monitor (¬ section 13.2.1).
S.04
10.7 Live monitor – display during heating mode
If the boiler is operating correctly, the display will show status code "S.04".
> Close the drain valve.
> Fill the heating system again with water as described in
¬ section 10.5.3.
> Re-fill the system until the system design pressure of
0,1 MPa (1,0 bar) is attained. (The actual reading on the
digital pressure gauge should ideally be 0,05 MPa
(0,5 bar) plus an additional pressure corresponding to
the highest point of the system above the base of the
boiler – 10 m head equals an additional 1 bar reading on
the pressure gauge. The minimum pressure should not
be less than 0,1 MPa (1 bar) in any installation.) If the sys-
tem is to be treated with an inhibitor it should be applied
at this stage in accordance with the manufacturer’s
instructions. Further information can be obtained from
Sentinel, Betz Dearborn Ltd., Tel: 0151 420 9595, or Fer-
nox, Alpha–Fry technologies. Tel: 0870 8700362.
> Refit the boiler casing (¬ section 4.7).
> Attach the bottom cover to the boiler by sliding the front
edge of the cover into the lip at the bottom front edge of
the appliance chassis.
> Carefully push the rear of the bottom cover upwards
until the spring retaining clips engage at the side of the
appliance. It may be necessary to adapt the bottom
cover by removing the easy break sections.
10.10.2 Checking the hot water generation
> Switch on the boiler.
> Open a hot water valve all the way.
> Activate the Live monitor (¬ section 13.2.1).
If hot water generation is working correctly, the display
shows "S.14".
S. 14
10.8 Display for hot water generation
10.11 Final flush of the heating system ("hot")
> Operate the appliance until the boiler and the heating
system are up to temperature.
> Check the heating system for leaks.
> Connect a hose to the drain valve located at the lowest
position of the heating system.
> Shut off the boiler, open the drain valve and all purge
valves on the radiators and allow the water to flow out of
the heating system and the boiler quickly and fully.
Installation and maintenance instructions ecoTEC pro 0020129672_05 37
Adapting the boiler to the heating installation
11
11 Adapting the boiler to the heating
installation
You can find all setting options in the diagnostic codes in
the installer level (¬ section 9.2).
11.1 Diagnosis codes – Overview
You can use the parameters that are marked as adjustable
in ¬ table 11.1 to adapt the boiler to the heating installation
and the needs of the customer:
You can enter your settings in the last column
after setting the system-specific parameters.
i
> Switch to the installer level (¬ section 9.2) and select
the diagnostic codes.
> Press the minus button
to switch between the displayed diagnosis
codes.
With modifiable parameters:
> Press the right-hand selection button
select the parameter to make a change.
> Press the minus button
to change the current setting.
> Press the right-hand selection button
firm the change.
The change is saved.
or the plus button
to
or the plus button
to con-
38 Installation and maintenance instructions ecoTEC pro 0020129672_05
Adapting the boiler to the heating installation
11
Code Parameters Adjustable values
D.000 Heating partial load Adjustable heating partial load in kW
D.001 Overrun time of internal pump for
heating mode
D.002 Max. burner anti-cycling time heating
at 20 °C flow temperature
D.003 Outlet temp. actual value in °C Not adjusta-
D.004 Measured value of hot water sensor Not relevant Not adjusta-
D.005 Flow temperature target value (or
return target value)
D.006 Hot water temperature target value
(VUW boilers only)
D.007 Warm start temperature target value
(only with VUW boilers)
Cylinder temperature target value
(only with VU boilers)
D.008 Room thermostat at terminal RT Room thermostat open (no heat requirement)
D.009 Target value from external eBus con-
troller
D.010 Status of internal pump 1 = on, 0 = off Not adjusta-
D.011 Status of external heating pump 1 to 100 = on, 0 = off Not adjusta-
D.012 Status of cylinder charge pump Not relevant Not adjusta-
D.013 Status of hot water circulation pump Not relevant Not adjusta-
D.014 Target pump speed (high-efficiency
pump)
D.015 Actual pump speed (high-efficiency
pump)
D.016 Room thermostat 24 V DC open/
closed
D.017 Heating flow/return regulation
changeover
D.018 Pump operating mode setting 1 = Comfort (continuously operating pump)
D.019 Operating mode of 2-stage pump Not relevant Not adjusta-
D.020 Max. setting for cylinder target value Not relevant Not adjusta-
D.022 Hot water demand via C1/C2, internal
hot water control system
D.023 Summer/winter operating mode (heat-
ing on/off)
D.025 Hot water generation enabled by eBUS
controller
D.026 Auxiliary relay control Not relevant Not adjusta-
Auto: Boiler automatically adjusts max. partial load to current system demand
1 - 60 min 5 min
2 - 60 min 20 min
In °C, max. of the value set in d.71, limited by an eBUS controller if connected)
35 to 65 °C Not adjusta-
40 to 65 °C
15 °C frost protection, then 40 to 70 °C;
(max. temperature can be adjusted under D.020)
Room thermostat closed (heat requirement)
in °C Not adjusta-
Not relevant Not adjusta-
Not relevant Not adjusta-
0 = Room thermostat open (no heating mode)
1 = Room thermostat closed (heating mode)
0 = Flow, 1 = Return 0
3 = Eco (intermittently operating pump)
Not relevant Not adjusta-
1 = Heating on, 0 = Heating off (summer mode) Not adjusta-
1 = Yes, 0 = No Not adjusta-
Factory
setting
Auto
3
Your own
setting
ble
ble
Not adjusta-
ble
ble
Not adjusta-
ble
Not adjustable
ble
ble
ble
ble
ble
ble
ble
Not adjusta-
ble
ble
ble
ble
ble
ble
ble
11.1 Diagnosis codes
Installation and maintenance instructions ecoTEC pro 0020129672_05 39
Adapting the boiler to the heating installation
11
Code Parameters Adjustable values
D.027 Switching of relay 1 on the
"2 in 7" multi-functional module VR 40
D.028 Switching of relay 2 on the
"2 in 7" multi-functional module VR 40
D.033 Fan speed target value In rpm Not adjustable
D.034 Fan speed actual value In rpm Not adjustable
D.035 Position of the diverter valve 0 = Heating; 100 = Hot water; 40 = Mid-position Not adjustable
1 = Circulation pump
2 = External pump
3 = Cylinder charging pump
4 = Extractor hood
5 = External solenoid valve
6 = External fault message
7 = Solar pump (not active)
8 = Remote control eBUS (not active)
9 = Legionella protection pump (not active)
10 = Collective solar valve (not active)
1 = Circulation pump
2 = External pump
3 = Cylinder charging pump
4 = Extractor hood
5 = External solenoid valve
6 = External fault message
7 = Solar pump (not active)
8 = Remote control eBUS (not active)
9 = Legionella protection pump (not active)
10 = Collective solar valve (not active)
Factory
setting
2
2
Your own
setting
D.036 Hot water flow quantity
(impeller sensor)
D.039 Solar feed temperature Actual value in °C Not adjustable
D.040 Flow temperature Actual value in °C Not adjustable
D.041 Return temperature Actual value in °C Not adjustable
D.044 Digitised ionisation value Display range 0 to 1020,
D.046 Pump type Not relevant Not adjustable
D.047 Outside temperature (with weather-
controlled Vaillant controller)
D.050 Offset for minimum speed In rpm, setting range: 0 to 3000 Nominal value
D.051 Offset for maximum speed In rpm, setting range: -990 to 0 Nominal value
D.058 Activation of solar post-heating for VUW
boilers;
Switch hot water mode
D.060 Number of temperature limiter shut-
downs
D.061 Number of ignition device cutoffs Number of unsuccessful ignitions in the last attempt Not adjustable
In l/min Not adjustable
> 800 no flame
< 400 good flame
Actual value in °C Not adjustable
set in factory
set in factory
0: Solar post heat mode deactivated
3: DHW activation target value minimum 60 °C
Number of shutdowns Not adjustable
0
Not adjustable
D.064 Average ignition time In seconds Not adjustable
D.065 Maximum ignition time In seconds Not adjustable
11.1 Diagnosis codes (continued)
40 Installation and maintenance instructions ecoTEC pro 0020129672_05
Adapting the boiler to the heating installation
11
Code Parameters Adjustable values
D.067 Remaining burner anti-cycling time In minutes Not adjustable
D.068 Unsuccessful ignitions at 1st attempt Number of unsuccessful ignitions Not adjustable
D.069 Unsuccessful ignitions at 2nd attempt Number of unsuccessful ignitions Not adjustable
D.070 Setting diverter valve position 0 = Normal mode
D.071 Target value maximum heating flow tem-
perature
D.072 Internal pump overrun after cylinder
charging
D.073 Warm start target offset Adjustable from -15 K to 5 K 0
D.075 Max. charging time for domestic hot
water cylinder without independent control system
D.076 Device specific number 7 = VUW 24
D.077 Limit on cylinder charging output
in kW
D.078 Limit on cylinder charging temperature
in °C
D.080 Operating hours, heating In hours (h) Not adjustable
1 = Mid-position (parallel mode)
2 = Permanent heating setting
40 to 80 °C 75 °C
Not relevant Not adjustable
Not relevant Not adjustable
8 = VUW 28
Not relevant Not adjustable
Not relevant Not adjustable
Factory
setting
0
Your own
setting
Not adjustable
D.081 Operating hours, hot water generation In hours (h) Not adjustable
D.082 Number of burner start-ups in heating
mode
D.083 Number of burner start-ups in hot water
mode
D.084 Maintenance indicator: Number of hours
until the next maintenance
D.088 Start delay for hot water draw-off detec-
tion via impeller (VUW boilers only)
D.090 Status of digital controller 1 = Recognised, 0 = Not recognised Not adjustable
D.091 Status DCF with external sensor con-
nected
D.092 actoSTOR module recognition Not relevant Not adjustable
D.093 Invalid device specific number (DSN) Setting range: 0 to 99
D.094 Delete fault history Delete fault list
D.095 Software version of PeBUS components PCB (BMU)
D.096 Factory setting Reset all adjustable parameters to default setting
11.1 Diagnosis codes (continued)
Number of burner start-ups Not adjustable
Number of burner start-ups Not adjustable
Setting range: 0 to 3000 hrs and "---" for deactivated "---"
0 = 1.5 l/min and no delay,
1 = 3.7 l/min and 2 sec. delay
0 = No reception, 1 = Reception, 2 = Synchronised, 3 =
Valid
Display (AI)
0
Not adjustable
Not adjustable
Installation and maintenance instructions ecoTEC pro 0020129672_05 41
Adapting the boiler to the heating installation
11
11.1.1 Setting the heating partial load
The heating partial load of the Vaillant ecoTEC pro boiler is
factory-set to "auto". This means that the boiler independently determines the optimum heating output depending
on the current heat demand of the system. A setting is normally no longer required. If you still want to set a fixed
maximum heating partial load, you can set a value under
diagnostic code "D.000", which equates to the boiler output
in kW.
11.1.2 Setting pump overrun time and pump
operating mode
The pump overrun time for the heating mode is set at the
factory to a value of 5 minutes. You can set the pump overrun time under diagnosis code "D.001" within the range of
1 minute to 60 minutes. You can set a different pump operating mode under diagnosis code "D.018". Here you have
the choice between 3 = Eco and 1 = Comfort.
Comfort (continuously operating pump)
The internal pump is switched on when the heating flow
temperature is not at "Heating off"(¬ Operating instruc-
tions) and the heating requirement is enabled via an external controller.
11.1.5 Burner anti-cycling time
Setting the burner anti-cycling time
To prevent frequent switching on and off of the burner and
therefore energy loss, an electronic restart lockout is activated for a specific period each time the burner is switched
off. You can adjust the burner anti-cycling time to the conditions of the heating installation.
The burner anti-cycling time is only activated for the heating mode.
Hot water handling during a burner anti-cycling time does
not affect the timer.
You can set the maximum burner anti-cycling time at
installer level under diagnosis code "D.002" within the
range 2 minutes to 60 minutes (factory setting: 20 min).
The effective burner anti-cycling time depends on the current target flow temperature and the maximum burner anticycling time set.
The effective burner anti-cycling times with respect to the
target flow temperature and the maximum set burner anticycling time can be found in the following table.
The remaining burner anti-cycling time following
a regular shutdown in heating mode can be
i
called up under diagnosis code "d.067".
Eco (intermittently operating pump)
Pump operating mode Eco is the factory setting. This pump
operating mode is useful for removing residual heat after
hot water generation when the heat demand is extremely
low and large temperature spreads exist between the hot
water generation and heating mode target values. This prevents living rooms from being under-supplied. If there is a
heat demand, the pump is switched on every 25 minutes for
5 minutes once the overrun time has elapsed.
11.1.3 Setting the maximum flow temperature
The maximum flow temperature for the heating is set at the
factory to 75 °C. This can be set to a value in the range of
40 °C to 80 °C under diagnosis code "D.071".
11.1.4 Setting the return flow temperature control
If the boiler is connected to an underfloor heating system,
the temperature control can be changed from flow temperature regulation (default setting) to return flow temperature
control under diagnosis code "D.017".
Reset remaining burner anti-cycling time
> Press the fault clearance key (¬ Operating instruc-
tions).
42 Installation and maintenance instructions ecoTEC pro 0020129672_05
Adapting the boiler to the heating installation
11
T
(target)
Feed
[°C]
20 2.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0
25 2.0 4.5 9.2 14.0 18.5 23.0 27.5 32.0 36.5 41.0 45.0 50.0 54.5
30 2.0 4.0 8.5 12.5 16.5 20.5 25.0 29.0 33.0 37.0 41.0 45.0 49.5
35 2.0 4.0 7.5 11.0 15.0 18.5 22.0 25.5 29.5 33.0 36.5 40.5 44.0
40 2.0 3.5 6.5 10.0 13.0 16.5 19.5 22.5 26.0 29.0 32.0 35.5 38.5
45 2.0 3.0 6.0 8.5 11.5 14.0 17.0 19.5 22.5 25.0 27.5 30.5 33.0
50 2.0 3.0 5.0 7.5 9.5 12.0 14.0 16.5 18.5 21.0 23.5 25.5 28.0
55 2.0 2.5 4.5 6.0 8.0 10.0 11.5 13.5 15.0 17.0 19.0 20.5 22.5
60 2.0 2.0 3.5 5.0 6.0 7.5 9.0 10.5 11.5 13.0 14.5 15.5 17.0
65 2.0 1.5 2.5 3.5 4.5 5.5 6.5 7.0 8.0 9.0 10.0 11.0 11.5
70 2.0 1.5 2.0 2.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
75 2.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
11.2 Effective burner anti-cycling times
11.1.6 Setting the maintenance interval
Set maximum burner anti-cycling time [min]
1 5 10 15 20 25 30 35 40 45 50 55 60
On completion of the set operating hours, you
must set the maintenance interval again in diag-
You can define maintenance intervals for the ecoTEC pro.
i
nosis mode.
After the set burner operating hours have elapsed, in addition to the current flow temperature, the maintenance sym-
(open-end spanner) appears in the display and this
bol
11.1.7 Setting the by-pass valve
shows that the boiler must be serviced. The display on the
eBUS controller (accessory) shows the information "Maintenance" "MAIN".
The boilers have a by-pass valve.
The pressure is adjustable in the range between 17.0 MPa
(170 mbar) and 35.0 MPa (350 mbar). Approx. 25.0 MPa
Heat demand
5.0 kW
10.0 kW
15.0 kW
20.0 kW
25.0 kW
> 27.0 kW
11.3 Guideline values for operating hours
Number of
persons
1 - 2
2 - 3
1 - 2
2 - 3
2 - 3
3 - 4
3 - 4
4 - 5
3 - 4
4 - 6
3 - 4
4 - 6
Burner operating hours until the
next inspection/service
(depending on the system type)
1,050 h
1,150 h
1,500 h
1,600 h
1,800 h
1,900 h
2,600 h
2,700 h
2,800 h
2,900 h
3,000 h
3,000 h
(250 mbar) is pre-set (mid-position). The pressure changes
by approx. 1.0 MPa (10 mbar) each time the adjusting screw
is rotated. By turning right, the pressure increases and turning left decreases it.
1
> Set the operating hours until the next service using diag-
nosis code "d.084".
Guideline values for the setting can be found in
¬ table 11.3. The values stated correspond to an average
boiler operating time of one year.
You can set the operating hours in increments of ten from
0 to 3,000 h.
If you do not enter a figure under diagnosis code "D.084"
but instead enter the symbol "–", then the "Maintenance
11.1 Setting the by-pass valve
display" function is not active.
Installation and maintenance instructions ecoTEC pro 0020129672_05 43
Adapting the boiler to the heating installation
11
> Regulate the pressure using the setting screw (1).
Position of the
setting screw
Right-hand stop
(turned all the way
down)
Mid-position (5 turns
to the left)
5 further turns to the
left from the mid-position
11.4 Setting value for the by-pass valve (feed head)
Pressure
in MPa
(mbar)
35.0 (350)
25.0 (250) Factory setting
17.0 (170)
Notes/application
If the radiators do not get
properly hot in the default
setting.
Note: In this case, you must
set the pump to the maximum
stage.
If noises in the radiators or
radiator valves are produced
11.2 Handing over the boiler to the operator
Danger!
Risk of poisoning and burns caused by
a
escaping hot flue gas!
Hot flue gas can escape and cause poisoning and burns if the boiler is operated with
an incompletely mounted or open air/flue
gas duct or if the boiler is operated with
internal leaks with the front casing open.
> Operate the boiler
- for commissioning
- for testing purposes
- in continuous operation
only when the front casing is fitted and
closed and the air/flue gas duct is completely fitted.
> Exclusively for test purposes such as gas
working pressure testing the boiler may
be operated with the front casing
removed for short durations ONLY but
must have a completely mounted air/flue
gas duct.
If this boiler is not installed and commissioned in accordance with the manufacturer's instructions, this may void
the guarantee (Note: Your legal rights remain unaffected
by this.)
> Handover the boiler to the operator.
> Explain the basic operation of the heating installation to
the operator.
> Provide the operator with all relevant instructions and
boiler documentation.
> Go through the operating instructions with the operator
> Reply to his questions if necessary.
> Make the operator aware of the need to keep the instruc-
tions in a handy location near the boiler, but not in or on
the boiler.
> Draw special attention to the safety instructions, which
the operator must follow.
> Instruct the operator that no changes or adaptations
must be made to the flue system or combustion air sup-
ply. These must both terminate outside of the building
and be constructed only from approved components.
> Explain to the operator how he should monitor the water
level/filling pressure of the system.
> Explain to the operator which measures are required to
top up and purge the heating installation if required.
> Explain to the operator how to correctly set the tempera-
tures, the controllers and the thermostatic radiator
valves (economically).
> Complete and sign off the Benchmark commissioning
check list.
> Complete and sign off the guarantee documentation.
> After completing the installation, stick the 835593
sticker in the user's language to the front of the boiler.
The sticker is delivered with the boiler.
You must brief the operator of the boiler on the handling
and function of the ecoTEC pro.
> Explain the importance of regular maintenance by a
competent skilled trade company to the operator.
It is strongly recommended that a maintenance contract
be taken out to ensure regular maintenance. Important
information is available from Vaillant Service Solutions
(0870 6060 777).
> Complete the benchmark Benchmark gas boiler commis-
sioning checklist which is found at the end of these
instructions.
44 Installation and maintenance instructions ecoTEC pro 0020129672_05
Inspection and maintenance
12
12 Inspection and maintenance
After servicing, complete the relevant Service Record section of the Benchmark Checklist located on the inside back
pages of this document.
12.1 Inspection and maintenance intervals
Danger!
Risk of injury and risk of damage to prop-
a
a
All service work must be carried out by a competent person
in accordance with the Gas safety, installation and use regulations. In the UK this is considered to be a person approved
at the time by the Health and Safety Executive.
In addition BS 6798: 2009 "Specification for installation
and maintenance of gas-fired boilers of rated input not
exceeding 70 kW net" advises that:
– The person carrying out a combustion measurement
must be assessed as competent in the use of a flue gas
analyser and the interpretation of the results.
– The flue gas analyser used must be one meeting the
requirements of BS 7927 or BS-EN50379-3 and be cali-
brated in accordance with the analyser manufacturers’
requirements.
– Competence can be demonstrated by satisfactory com-
pletion of the relevant ACS standard assessment, which
covers the use of electronic portable flue gas analysers’
in accordance with BS 7967, parts 1 to 4.
– The flue gas analyser is set to the correct fuel setting.
erty due to neglected inspection and
maintenance!
Neglected inspection and maintenance
works or not observing the stated inspection and maintenance intervals can interfere with the operational safety of the
boiler and can result in damage to property
and to persons.
> Point out to the operator that he must
observe the demanded inspection and
maintenance intervals as a minimum.
> Carry out proper regular inspections
once a year.
> Carry out regular maintenance as dic-
tated by findings during the inspection
process.
Danger!
Danger of life and limb due to improper
inspection/maintenance!
Inspections/Maintenance work carried out
improperly can result in leakages and explosion.
> The boiler may only be inspected/main-
tained by a competent person.
We recommend the conclusion of an inspection and maintenance contract with an approved company or installer.
The inspection serves to determine the actual condition of
the respective boiler and compare it with the specified condition. This is done by measuring, checking and observing.
Maintenance is required in order to eliminate any deviations
of the actual condition from the specified condition.
This normally is done by cleaning, adjustment and, if necessary, replacing individual components that are subject to
wear.
You must carry out an annual inspection of the Vaillant
ecoTEC.
The annual inspection can be effectively performed without
removing components by requesting data from the DIA system, carrying out the simple visual checks indicated in
¬ table 12.2 and performing a flue gas measurement.
The maintenance intervals and their scope are determined
by the heating engineer based on the condition of the
boiler found during the inspection.
All inspection and maintenance work should be performed in the
order specified in ¬ table 12.2.
Danger!
Risk of poisoning and burning caused by
a
12.1.1 General inspection and maintenance
To ensure the faultless operation, long term availability of
all functions and long working life of your Vaillant boiler
and to prevent modifications to the approved series status
only genuine Vaillant spare parts must be used when carrying out inspection, maintenance and repair work.
escaping hot flue gas!
Hot flue gas can escape and cause poisoning and burning if the boiler is operated
with an incompletely mounted or open air/
flue gas duct or if the boiler is operated
with internal leaks with the front casing
open.
> Operate the boiler
- for commissioning
- for testing purposes
- in continuous operation
only when the front casing is fitted and
closed and the air/flue gas duct is completely mounted.
> Exclusively for test purposes such as gas
working pressure testing you can operate
the boiler may be operated with the front
casing removed for short durations ONLY
but must have a completely mounted air/
flue gas duct.
instructions
Installation and maintenance instructions ecoTEC pro 0020129672_05 45
Inspection and maintenance
12
For an overview of the available original Vaillant spare
parts, contact the Vaillant sales office on 0870 6060 777.
During any inspection and maintenance or after change of
parts of the combustion circuit, the following must be
checked:
– The boiler has been installed in accordance with the rele-
vant installation instructions.
– The integrity of the flue gas installation and flue seals is
in accordance with the relevant flue installation instruc-
tions enclosed.
– Visual, the integrity of the boiler combustion circuit and
relevant seals (paying particular attention to the burner
door seal).
– The gas inlet working pressure at maximum rate as
described in ¬ section 10.9.4.
– The gas flow rates as described in ¬ section 10.9.3.
– Correctness of electrical, water and gas connections.
– Correctness of the water pressure.
– The condition of the whole system, in particular the con-
dition of radiator valves, evidence of leakage from the
heating system and dripping taps.
> Correct any faults before proceeding.
12.1.2 Safety instructions
> When removing any water carrying components ensure
that water is kept away from all electrical components.
Always perform the following steps after performing any
inspection or maintenance work:
> Always use new seals and O-rings when parts are
replaced.
> Open the service valves in the heating flow and return.
> Open the cold water stop valve if necessary.
> Reconnect the boiler to the power mains.
> Switch on the boiler using the on/off switch.
> Fill the heating circuit of the boiler to a pressure of
between 0,1 and 0,2 MPa (1,0 and 2,0 bar) if required.
> If you have topped up with water, purge the heating
installation using test program P.00 (¬ section 10.5.2).
> Open the gas isolation valve.
> Check the boiler for gas and water leaks.
> Replace the front casing to the boiler (¬ section 4.7).
> Carry out a functional check of the boiler
(¬ section 10.10).
> Always check earth continuity, polarity and resistance to
earth with a multimeter after any service work and after
replacing any electrical component.
> If necessary, refill and re-purge the heating installation.
> Complete the benchmark gas boiler commissioning serv-
ice record on the back pages of these instructions.
Danger!
Danger of life and limb by electric shock!
a
i
Always perform the following steps prior to inspection or
maintenance work:
> Switch off the main switch.
> Disconnect the boiler from the power mains by
> Further check for electrical isolation of the appliance by
use of a test meter.
> Close the gas isolation valve.
> Close the service valves in the heating flow and return.
> Remove the front casing from the boiler.
The supply terminals of the boiler are
under mains voltage even if the boiler main
switch is off.
> Don’t touch the supply terminals.
> Protect the electronic box from any
water or spray.
> Before working on the boiler, turn off the
power and secure against restart.
If it is necessary to keep the electricity to the
boiler switched on for certain inspection and
maintenance, this is indicated in the description
of the maintenance task.
– disconnecting the mains plug or
– de-energising the boiler via an isolating device with a
contact opening of at least 3 mm (e. g. fuses or power
switches).
12.1.3 Checking the CO/CO2 ratio and the CO2
concentration
Danger!
Danger of explosion, fire or poisoning
a
i
caused by incorrect flue gas value
adjustment.
Safe combustion can only be verified by
measuring CO/CO
> Make sure that the CO/CO
exceed the value shown in
Checking/adjustment of the CO2 concentration
is required in the following instances:
- replacement of gas valve,
- conversion to or from Natural Gas/LPG
- or if an incorrect combustion is suspected.
ratio.
2
ratio does not
2
¬table12.1.
46 Installation and maintenance instructions ecoTEC pro 0020129672_05
1
12.1 Measuring the CO2 concentration
The boiler is fitted with a flue gas analysis point
(1). A suitable flue gas analyser can be con-
i
> Remove the front casing (¬ section 4.7).
> Start the testing program P.01 (¬ section 10.2).
> Wait at least 5 minutes until the boiler reaches its oper-
ating temperature.
> Measure the CO
point (1). Compare the measured value with the corre-
sponding value in ¬ table 12.1.
> If all these points are as required, proceed as described
in ¬ section 12.2.
> If one of the flue gas values is greater than the accepta-
ble values in ¬ table 12.1, then proceed as described in
the following ¬ section 12.1.4.
12.1.4 Adjusting the CO2 concentration (or the air
a
nected to this point to establish the combustion
performance of the boiler.
concentration at the flue gas analysis
2
ratio)
Danger!
Increased risk of poisoning due to incorrect settings!
If one of the flue gas values is greater than
the acceptable values in ¬ table 12.1 then:
> Check the integrity of the complete flue
gas installation.
> Check the integrity of the combustion
circuit seals.
> Check the gas inlet working pressure.
> Check the gas flow rate.
Inspection and maintenance
12.2 Removing the covering cap for the air ratio setting adjusting screw (gas setting) and making the air ratio setting
If the flue gas value needs to be adjusted, proceed as
follows.
The adjusting screw for making the air ratio setting is
located beneath a blue covering cap (1), which is easy to
remove.
> Remove the yellow sticker.
> Remove the covering cap.
> Set the relevant CO
casing ¬ table 12.1) by turning the screw (2). Use a
2.5 mm Allen key for this.
– Turn to the left: higher CO
– Turn to the right: lower CO
Natural gas: Only perform the adjustment in
small increments of 1/8 turn and wait approxi-
i
i
mately 1 minute after each adjustment until the
value stabilises.
Liquid gas: Only perform the adjustment in very
small increments (approximately 1/16 turns), and
wait approximately 1 minute after each adjustment until the value stabilises.
value (value with removed front
2
concentration,
2
concentration.
2
12
1
2
> Press the "Cancel" selection button once the settings
have been adjusted.
> When the adjusting work is complete, put the covering
cap back on again.
> Put the front casing back on (¬ section 4.7).
Installation and maintenance instructions ecoTEC pro 0020129672_05 47
Inspection and maintenance
12
Settings
after 5 minutes full
CO
2
load mode with
boiler front casing fitted
after 5 minutes full
CO
2
load mode with boiler
front casing removed
Set for Wobbe index Ws kWh/m
CO value with full load ppm < 250 < 250
CO/CO
2
12.1 Factory gas setting
Unit
Vol.–%
Vol.–%
Natural gas
(H)
9.2 +/- 1.0 10.2 +/- 0.5
9.0 +/- 1.0 10.0 +/- 0.5
3
15 22.5
< 0.0031 < 0.0026
Propane
Danger!
Risk to life due to poisoning!
a
CO is an extremely toxic gas. Risk to life
due to excessive CO concentrations.
> If you are not able to adjust the boiler
correctly and the flue gas values remain
higher than allowed in ¬ table 12.1, call
the Vaillant Service Solutions
(0870 6060 777).
> Do not start up the boiler!
48 Installation and maintenance instructions ecoTEC pro 0020129672_05
12.2 Inspection and maintenance work steps
Inspection and maintenance
12
Column 1
No. Activity
Check the air flue gas installation for leaks and for proper fixation and ensure it is not
1
blocked or damaged and is fitted correctly, complying with the relevant installation instructions.
2 Carry out a general inspection of the boiler for dirt and dust and clean as necessary. x x
Visually inspect the complete heat engine for its general condition and for signs of corrosion,
3
sooting or other forms of damage (paying particular attention to the burner door seal). If
damage is evident proceed to column 2.
Measure the gas flow rate during operation with maximum load (¬ section 10.9.3). If the gas
4
flow rate complies to the ¬ table 10.2 continue with column 1, if not proceed to column 2.
Check the gas inlet working pressure (¬ section 10.9.4) operation with maximum load. If the
5
gas inlet working pressure complies to the ¬ table 10.3 continue with column 1, if not proceed
to column 2.
Check combustion by measuring CO, CO
tolerances of ¬ table 12 proceed to maintenance column 2. You must not proceed with the
6
maintenance if a new burner door seal kit is not available.
Isolate the boiler from the power mains. Check whether the electrical plug connections and
7
the other electrical connections are fitted tightly and correct them if necessary.
8 Close the gas isolation valve and the service valves. x
Drain the pressure in the boiler on the water side (observe pressure gauge) and check the
9
charge pressure of the expansion vessel. Top up if necessary.
10 Remove the compact thermal module. x
Check the integrity of all combustion circuit seals, especially the burner door seal. Ensure any
11
damage found is repaired before proceeding.
12 Clean the heat exchanger (¬ section 12.3.2). x
13 Check whether the burner is dirty and clean it if necessary. x
Check the condensate trap in the boiler, clean and fill. Flush through all discharge pipe work
14
(ensure route and termination are correct and it is unlikely to freeze up in severe weather).
15 Install the compact thermal module. Caution: Use new seals and nuts! x
Replace the hot water heat exchanger if the volume of water is insufficient or the output tem-
16
perature is not reached
Remove the impeller sensor, clean the filter in the cold water inlet of the sensor and refit the
17
sensor.
Open the gas isolation valve, reconnect the boiler with the power mains and switch on the
18
boiler.
Open the service valves and fill up the boiler/appliance to approximately 0,1 - 0,2 MPa (1,0 -
19
2,0 bar) (depending on the static height of the system). Start the purging program P.00.
Perform a test operation of the boiler and heating installation, including hot water generation
20
and purge again if necessary.
21 Check visually the ignition and burner performance. x x
Check the boiler for leaks of any kind (gas, flue gas, water, condensate) and rectify as neces-
22
sary.
If you had problems with the CO, CO
them again now ( ¬ table 12.1). If they are outside of the tolerances of ¬ table 12.1 make an
23
adjustment, see ¬ section 12.1.4.
Complete the Benchmark gas boiler commission service record on the back pages of this
24
manual.
12.2 Inspection and maintenance steps
and CO/CO2. If the values are outside the
2
, CO/CO2-values in Step 6 before the maintenance, check
2
Inspection must
be carried out
each year
xx
xx
xx
xx
x
xx
xx
xx
xx
xx
xx
Column 2
Maintenance
must be car-
ried out at reg-
ular intervals
x
x
x
x
x
x
* Additional checks and procedures will be required where the
boiler is used with a cylinder or solar thermal system. These are
not covered in this manual.
Installation and maintenance instructions ecoTEC pro 0020129672_05 49
Inspection and maintenance
12
12.2.1 Filling the boiler and the heating
installation
A description of how to fill the boiler and the heating installation is provided in ¬ section 10.5.
12.2.2 Draining the boiler
> Close the service valves of the boiler.
> Start test program P.06 (diverter valve mid-position)
(¬ section 10.5).
> Open the drain valves on the service valves.
> Make sure that the cap of the automatic air vent on the
internal pump is open so that the boiler can be drained
fully.
12.2.3 Draining the entire heating installation
> Attach a hose to the draining device on the system.
> Bring the open end of the hose to an appropriate drain
point.
> Start test program P.06 (diverter valve mid-position)
(¬ section 10.5).
> Make sure that the service valves on the boiler and the
cap of the automatic air vent on the internal pump is
open.
> Open the drain cock.
> Open the purging valves on the radiators.
Start from the highest radiator and then work from the
top to the bottom.
> Once the water has drained off, close the purging valves
of the radiators and the drain cock.
The compact thermal module consists of five main components:
1. Speed-regulated fan
2. Gas/air mixture fitting
3. Gas supply (mixture pipe) to the premix burner
4. Burner door
5. Premix burner
> Switch off the boiler using the on/off switch.
> Close the gas isolator cock on the boiler.
> Close the service valves on the boiler.
> Remove the front casing from the boiler (¬ section 4.7).
> Fold the electronics box forwards (¬ section 8.2).
1
2
3
4
12.3 Remove the air intake pipe
12.3 Carrying out maintenance work
12.3.1 Removing the compact thermal module
Danger!
Risk of being burned or scalded by hot
a
components!
There is danger of being burned or scalded
at the compact thermal module and at all
water-carrying components.
> Only carry out work on these compo-
nents if they have cooled down.
> Unscrew the retaining screw (2, ¬ fig. 12.3) and detach
the air intake pipe (1, ¬ fig. 12.3) from the intake stub.
> Unscrew either the cap nut (3, ¬ fig. 12.3) from the gas
valve or the cap nut (4, ¬ fig. 12.3) between the gas
pipes.
> Secure the gas pipe against twisting by holding the pipe
against the spanner flat when undoing the cap nut.
50 Installation and maintenance instructions ecoTEC pro 0020129672_05
Inspection and maintenance
> Remove the compact thermal module (¬ section 12.3.1).
1
12
7
6
5
4
12.4 Removing the compact thermal module
The plug on the fan motor has a latching lug
with which it engages in the slot. You have to
i
> Remove the plug of the ignition line (5, ¬ fig. 12.4) and
the ground connection (6, ¬ fig. 12.4) from the ignition
electrode.
> Remove the plug (3, ¬ fig. 12.4) from the fan motor.
> Remove the plug from the gas valve (4, ¬ fig. 12.4).
> Unscrew the four nuts (7, ¬ fig. 12.4).
> Remove the entire compact thermal module (2,
¬ fig. 12.4) from the heat exchanger (1, ¬ fig. 12.4).
> Once removed, check the burner and the heat exchanger
for damage and dirt.
> If necessary, clean the components according to the fol-
lowing sections.
> Check the burner flange insulation on the module. If
signs of damage, other than small cracks, are apparent
you must replaced it (article number 193 595).
release the latching lug by pushing it in to pull
off the plug.
2
3
1
12.5 Cleaning the heat exchanger
Caution.
Risk of damage to the heat exchanger.
b
> Clean the heating coil (3) of the heat exchanger (4)
using water or if required commercially-available white
vinegar.
> Allow the vinegar to act on the heat exchanger for
20 minutes.
> Rinse away any loose dirt with a sharp jet of water or
use a plastic brush.
> Do not point the water jet directly at the insulating sur-
face (2) on the back of the heat exchanger.
The water flows out of the heat exchanger through the condensate trap.
12.3.3 Checking the burner
> You should neither loosen nor tighten
the four screws (1).
2
3
4
1
12.3.2 Cleaning the heat exchanger
Caution.
Risk of damage from water spray.
b
Installation and maintenance instructions ecoTEC pro 0020129672_05 51
If you fail to protect the electronics box
adequately, water can penetrate the box
during cleaning and may damage the electronics.
> Protect the folded down electronics box
against sprayed water.
12.6 Checking the burner
Inspection and maintenance
12
As the burner (1) is maintenance-free, it does not require
cleaning.
> Check the surface of the burner for damage.
> If necessary, replace the burner.
12.3.4 Cleaning the condensate trap
a
Danger!
Risk of death caused by improper maintenance.
If you operate the boiler with an empty
condensate trap, flue gas can escape into
the room air.
> Top up the condensate trap after each
cleaning session.
1
12.8 Removing the filter from the cold water inlet
> Close the cold water stop valve.
> Drain the hot water from the boiler.
> Undo the nut (1, ¬ fig. 12.8) of the cold water supply line
from the casing of the boiler.
1
1
12.7 Cleaning the condensate trap
> Remove the lower part (1) of the condensate trap by
turning the bayonet fitting anti-clockwise.
> Clean the bottom of the condensate trap by flushing it
out with water.
> Fill the lower part of the condensate trap with water up
to about 10 mm below the upper edge.
> Re-fit the lower part of the condensate trap.
> Flush through all discharge pipe work (ensure route and
termination are correct and it is unlikely to freeze up in
severe weather).
12.3.5 Cleaning the filter in the cold water inlet
There is a filter in the cold water inlet of the boiler which
must be cleaned during maintenance work.
2
12.9 Removing the pipe with the cold water filter
> Fold the electronics box forwards (¬ section 8.2).
> Remove the clamp (1, ¬ fig. 12.9) from the flow sensor.
> Pull off the cold water pipe from the flow sensor.
> Remove the pipe (2, ¬ fig. 12.9) from the boiler.
> Rinse the filter under a jet of water holding against the
direction of flow.
> Refit the pipe with the cleaned filter in the reverse order.
> Always use new seals.
52 Installation and maintenance instructions ecoTEC pro 0020129672_05
12.3.6 Installing the compact thermal module
Danger!
Risk of death and risk of damage caused
a
by hot flue gas!
If you do not renew the seal and the selflocking nuts on the burner door, hot flue
gases may escape and cause personal
injury and material damage.
> Replace the seal each time you open the
burner door.
> Replace the self-securing nuts each time
you open the burner door.
> If the burner flange insulation on the
module shows signs of damage other
than small cracks it must be replaced
(article number 193 595).
10
9
Inspection and maintenance
12.11 Secure the gas pipe against twisting
> Tighten either the cap nut (6, ¬ fig. 12.10) on the gas
valve or the cap nut (7, ¬ fig. 12.10) between the gas
pipes. Use a new seal for this.
> Secure the gas pipe against twisting (¬ fig. 12.11) by
holding the pipe against the spanner flat when tighten-
ing the cap nut.
> Open the gas isolator cock on the boiler and ensure
there are no leaks.
> Check that the sealing ring in the air intake pipe is posi-
1
tioned correctly in the seal seat.
> Insert the air intake pipe (1, ¬ fig. 12.3) back into the
2
intake stub.
> Attach the air intake pipe using the retaining screw
3
4
(2, ¬ fig. 12.3).
12
8
7
12.10 Installing the compact thermal module
> Attach the compact thermal module (4, ¬ fig. 12.10) to
the heat exchanger (1, ¬ fig. 12.10).
> Tighten the four nuts (3, ¬ fig. 12.10) crosswise until the
burner door fits closely and uniformly onto the mating
surfaces (If a torque spanner is available, set at 6Nm).
> Attach the plug of the ignition line (10, ¬ fig. 12.10) and
the ground connection (9, ¬ fig. 12.10) to the ignition
electrode.
> Attach the plug (5, ¬ fig. 12.10) to the fan motor.
> Attach the plug (8, ¬ fig. 12.10) to the gas valve.
12.3.7 Checking the charge pressure of the
5
6
12.12 Checking the charge pressure of the expansion vessel
The service valves of the boiler must be closed.
expansion vessel
> Measure the charge pressure of the expansion vessel at
the testing nozzle (1) of the vessel with the boiler depres-
surised.
> Top up the expansion vessel at a pressure of less than
0.75 bar in accordance with the static height of the heat-
1
Installation and maintenance instructions ecoTEC pro 0020129672_05 53
Troubleshooting
13
ing installation, ideally with nitrogen, otherwise with air.
Ensure drain valve on boiler is open during topping up.
> If water escapes from the measuring stub pipes (1) of the
expansion vessel, you must replace the expansion vessel.
12.4 Checking the gas flow pressure
> Check the gas flow pressure (¬ section 10.9.4).
12.4.1 Checking CO2 content
> Check the CO2 content (¬ section 12.1.3).
13 Troubleshooting
13.1 Contact Vaillant Service Solutions
(0870 6060 777)
> If you contact Vaillant Service Solutions (0870 6060
777) or your Vaillant service partner, if possible, please
mention
– the fault code displayed (F.xx),
– the boiler status that is displayed (S.xx) in the "Live
monitor" (¬ section 13.2.1).
13.2 Performing diagnostics
13.2.1 Calling up Live Monitor (status codes)
You can call up the boiler status codes in the display which
provide information on the current operating status of the
boiler.
> Press the left-hand
buttons
("i") at the same time
and right-hand selection
S.04
13.1 Status code display view
13.2.2 Status codes – Overview
Display Meaning
Heating mode
S.00 Heating, no heat demand
S.01 Heating mode fan start-up
S.02 Heating mode pump flow
S.03 Heating mode, ignition
S.04 Heating mode, burner on
S.05 Heating mode, pump/fan overrun
S.06 Heating mode, fan overrun
S.07 Heating mode, pump overrun
S.08 Heating mode, burner anti-cycling time
13.1 Status codes
54 Installation and maintenance instructions ecoTEC pro 0020129672_05
Troubleshooting
13
13.2.3 Status codes – Overview
Display Meaning
DHW mode (VUW boiler)
S.10 Hot water demand via impeller sensor
S.11 DHW mode, fan start-up
S.13 DHW mode, ignition
S.14 DHW mode, burner on
S.15 DHW mode, pump/fan overrun
S.16 DHW mode, fan overrun
S.17 DHW mode, pump overrun
Hot water handling (VUW comfort mode, warm start)
S.20 DHW demand
S.21 DHW mode, fan start-up
S.22 DHW mode, pump running
S.23 DHW mode, ignition
S.24 DHW mode, burner on
S.25 DHW mode, pump/fan overrun
S.26 DHW mode, fan overrun
S.27 DHW mode, pump overrun
S.28 Hot water burner anti-cycling time
Special cases
S.30 Room thermostat (RT) is blocking heating mode
S.31 Summer mode active or no heat requirement from eBUS
controller
S.32 Waiting period because of fan speed deviation
S.34 Frost protection mode active
S.39 "Burner off contact" has triggered (e.g. contact thermo-
stat or condensate pump)
S.40 Comfort safety mode is active: Boiler is running with lim-
ited heating comfort (¬ section 13.2.4)
S.41 Water pressure > 2.8 bar
S.42 Flue non-return flap return signal blocks burner opera-
tion (only in connection with VR40 accessory) or condensate pump faulty, heat requirement is blocked
S.46 Comfort safety mode, flame loss at minimum load
S.53 Boiler is in waiting period of modulation block/operation
block function due to water shortage (supply-return
spread too large)
S.54 Boiler is in waiting period of operation blocking function
as a result of water shortage (temperature gradient)
S.76 System pressure too low; top up water
S.96 Return temperature sensor test running, heating
demands are blocked
S.97 Water pressure sensor test running, heating demands
are blocked
S.98 Flow/return temperature sensor test running, heating
demands are blocked
13.1 Status codes (continuation)
13.2.4 Service messages
val, for example, (¬ section 11.1.6) and it has elapsed. The
boiler is not in fault mode but continues to operate.
To obtain more information about the service message:
> Call up the "Live monitor" (¬ section 13.2.1).
13.2.5 Calling up diagnosis levels
You can use the diagnostic codes to view parameters and
modify certain parameters (¬ section 9.2) An overview of
the diagnostic codes can be found in ¬ table 11.1.
13.2.6 Reading off the fault codes
If a fault develops in the boiler, the display shows a fault
code F.xx.
Fault codes have priority over all other displays. If a fault
occurs, the display no longer shows the current heating
flow temperature of the heating installation.
If multiple faults occur at the same time, the display shows
the corresponding fault codes for two seconds each in
sequence.
> Remedy the fault.
> To restart the boiler, press the fault clearance key
(¬ Operating instructions).
> If you are unable to remedy the fault and the fault reoc-
curs despite having carried out several resets, contact
Vaillant Service Solutions (0870 6060 777).
13.2.7 Querying the fault memory
The boiler has a fault memory. ¬ section 9.2 describes how
you can call up the fault memory.
Here you can query the last ten faults that occurred in
chronological order.
The display shows:
– the number of faults that have occurred
– the fault currently selected with fault number F.xx.
> You can display the last 10 faults that occurred using the
minus button
or the plus button .
13.2.8 Resetting the fault memory
You can delete the entire fault list.
> Call up the installer level (¬ section 9.2).
> Set the diagnostic code "D.094" to 1 (¬ section 11.1).
If the "open-end spanner" maintenance symbol appears
on the display, a service message is present. The maintenance symbol appears if you have set a maintenance inter-
Installation and maintenance instructions ecoTEC pro 0020129672_05 55
Troubleshooting
13
13.2.9 Overview of fault codes
Code Meaning Cause
F.00 Flow temperature sensor interruption NTC plug not plugged in or has come loose, multiple plug on the PCB
F.01 Return temperature sensor interruption NTC plug not plugged in or has come loose, multiple plug on the PCB
F.10 Flow NTC short circuit NTC defective, short circuit in cable harness, cable/casing
F.11 Return NTC short circuit NTC defective, short circuit in cable harness, cable/casing
not plugged in correctly, interruption in cable harness, NTC defective
not plugged in correctly, interruption in cable harness, NTC defective
F.20 Safety switch-off: temperature limiter Incorrect earth connection between cable harness and boiler, flow or
F.22 Safety switch-off: low water pressure No water pressure, or water pressure is too low in the boiler, water pres-
F.23 Safety switch-off: Temperature difference too great Pump blocked, insufficient pump output, air in boiler, flow and return
F.24 Safety switch-off: Temperature rise too fast Pump blocked, poor pump performance, air in boiler, system pressure
F.25 Safety switch-off: Flue gas temperature too high Break in plug connection for optional flue gas safety thermostat (STB),
F.26 Fault: Gas valve without function Gas valve stepper motor not connected, multiple plug on the PCB not
F.27 Safety switch-off: Flame simulation Moisture on the electronics, electronics (flame monitor) defective, gas
F.28 Failure during start-up: ignition unsuccessful Gas meter defective or gas pressure regulator has triggered, air in gas,
F.29 Failure during operation: Re-ignition unsuccessful Gas supply temporarily stopped, flue gas recirculation, condensate duct
F.32 Fan fault Plug at fan not correctly plugged in, multiple plug on PCB not correctly
F.49 eBUS fault Short circuit on eBUS, eBUS overload or two power supplies with differ-
F.61 Fault: Gas valve regulation - Short circuit/short to earth in cable harness for the gas valve
F.62 Fault: Gas valve switch-off delay - Delayed shutdown of gas valve
return NTC defective (loose connection), black discharge via ignition
cable, ignition plug or ignition electrode
sure sensor defective, cable to pump or water pressure sensor loose/not
connected/defective
NTC interchanged
too low, non-return valve blocks/incorrectly installed
break in cable harness
plugged in correctly, interruption in cable harness, gas valve stepper
motor defective, electronics defective
solenoid valve leaking
gas flow pressure too low, thermal isolator device (TAE) has triggered,
condensate duct blocked, incorrect gas restrictor, incorrect ET gas valve,
fault on the gas valve, multiple plug on PCB incorrectly plugged in, break
in cable harness, ignition system (ignition transformer, ignition cable,
ignition plug, ignition electrode) defective, ionisation current interrupted
(cable, electrode), incorrect earthing of boiler, electronics defective
blocked, faulty earthing of boiler, ignition transformer has spark failure
plugged in, break in cable harness, fan blocked, Hall sensor defective,
electronics defective
ent polarities on the eBUS
- Gas valve defective (coils shorted to earth)
- Electronics defective
- Delayed extinguishing of flame signal
- Gas valve leaking
- Electronics defective
F.63 EEPROM error Electronics defective
F.64 Electronics/NTC fault Supply or return NTC short circuited, electronics defective
F.65 Electronic temperature fault Electronics overheating due to external influences, electronics defective
F.67 Electronics/flame fault Implausible flame signal, electronics defective
13.2 Fault codes
56 Installation and maintenance instructions ecoTEC pro 0020129672_05
Troubleshooting
Code Meaning Cause
F.68 Unstable flame signal fault Air in gas, gas flow pressure too low, wrong air ratio, condensate route
F.70 Invalid device specific number (DSN) Spare part case: Display and PCB changed at the same time and appliance
F.71 Flow NTC fault Flow temperature sensor signalling constant value:
F.72 Flow/return NTC fault Flow/return NTC temperature difference too great -> flow and/or return
F.73 Water pressure sensor signal in the wrong range
(too low)
F.74 Water pressure sensor signal outside correct
range
(too high)
F.75 Fault, no pressure change detection when start-
ing pump
F.76 Overheating protection on primary heat
exchanger has responded
F.77 Flue non-return flap/condensate pump fault No response from flue non-return flap or condensate pump defective
F.78 Interruption to DHW outlet sensor at external
controller
F.83 Flow and/or return temperature sensor tempera-
ture change fault
blocked, wrong gas restrictor, ionisation flow interruption (cables, electrodes), flue gas recirculation, condensate route
code not reset
- Flow temperature sensor incorrectly positioned at supply pipe.
- Flow temperature sensor defective.
temperature sensor defective
Interruption/short circuit of water pressure sensor, interruption/short cir-
cuit to GND in supply line to water pressure sensor or water pressure sensor defective
Cable to water pressure sensor has short-circuited at 5 V/24 V
or internal fault in water pressure sensor
Water pressure sensor and/or pump defective, air in heating installation,
too low water pressure in boiler; check adjustable bypass, connect external
expansion vessel to return
Cable or cable connections for safety fuse in primary heat exchanger or
primary heat exchanger defective
UK link box is connected, but hot water NTC not bridged
When the burner starts, the temperature change registered at flow and/or
return temperature sensor is non-existent or too small.
- Not enough water in the boiler
- Flow and/return temperature sensor not in correct position at pipe.
13
F.84 Fault: Flow/return temperature sensor tempera-
F.85 Fault: Flow and return temperature sensors incor-
connection
13.2 Fault codes (continued)
ture difference implausible
rectly fitted
No communication with the PCB Communication fault between display and PCB in the electronics box
Flow and return temperature sensors returning implausible values.
- Flow and return temperature sensors have been inverted.
- Flow and return temperature sensors have not been correctly fitted.
Flow and/or return temperature sensors
have been fitted to the same pipe/wrong pipe.
13.3 Running test programs
By activating various test programs, you can trigger special
functions on the boiler (¬ table. 10.1). The display shows
which test program you have chosen.
> Read how to start the test programs in ¬ section 10.2.
13.4 Resetting parameters to factory settings
As well as the option to manually reset individual parameters to the default settings specified in ¬ table 11.1, you can
also reset all parameters at once.
> Set the value of the diagnosis code parameter D.096 to
"1" (¬ section 11.1).
You have now reset all parameters to factory settings.
Installation and maintenance instructions ecoTEC pro 0020129672_05 57
Replacing components
14
14 Replacing components
The work described in this section must only be carried out
by a competent person.
> Only use genuine Vaillant spare parts for repairs .
An overview of the available genuine Vaillant spare parts
can be obtained:
– From your parts wholesaler
– Alternatively contact Spares Technical Enquiries on
01773 596615
or via email: technicalspares@groupservice.co.uk
14.1 Preparing for and completing replacement
work
14.1.1 Preparing for replacement work
Danger!
Risk of death from electric shock!
e
Mains connection terminals L and N remain
live even if the continuous voltage on/off
switch is turned off.
> Before carrying out maintenance work
on the boiler, switch the boiler off using
the on/off button.
> Disconnect the boiler from the power
mains by disconnecting the mains plug
or by de-energising the boiler via a partition with a contact opening of at least
3 mm (e. g. fuses or power switches).
> Reattach the front casing (¬ section 4.7).
> Perform a function check (¬ section 10.10).
14.2 Replacing the burner
> Remove the compact thermal module (¬ section 12.3.1).
1
14.1 Replacing the burner
> Undo the four screws (1) on the burner.
> Remove the burner.
> Fit the new burner with a new seal. Make sure that the
nose on the burner window grips the seal inside the
recess in the burner.
> Reinstall the compact thermal module.
(¬ Section 12.3.6).
When carrying out any repair to the boiler, make
sure that you observe the following instructions
i
> Switch off the boiler.
> Disconnect the boiler from the power mains
(¬ section 11.3).
> Remove the front casing (¬ section 4.7).
> Close the gas isolator cock.
> Close the service valves in the heating flow and in the
heating return.
> Close the service valve in the cold water pipe.
> Drain the boiler if you want to replace components that
carry water (¬ section 11.3.2).
> Make sure that water does not drip on live components
(e.g. the electronics box).
> Use only new seals and O-rings.
14.1.2 Completing replacement work
> Check the boiler for gas leaks.
58 Installation and maintenance instructions ecoTEC pro 0020129672_05
for your own safety and to avoid material damage to the boiler.
Replacing components
14
14.3 Replacing the fan or the gas valve
14.2 Removing/refitting the fan/gas valve unit
> If you want to replace the gas valve, unscrew the cap nut
(2, ¬ fig. 14.3) if the gas pipe is still secured to the gas
valve.
> Unscrew the two fixing screws (1, ¬ fig. 14.3) from the
1
2
3
4
5
6
7
8
gas valve and remove the fan from the gas valve.
> Replace the defective fan or the defective gas valve.
> Fit the gas valve and the fan in the same position as
before. Use new seals.
> Screw the fan to the gas valve.
> If you had replaced the gas valve, screw the cap nut of
the gas pipe (2, ¬ fig. 14.3) only loosely to the gas valve.
Only tighten the cap nut on the gas valve after complet-
ing the installation work.
> Refit the entire fan/gas valve unit in reverse order. You
must use a new seal for this (5, ¬ fig. 14.2).
> Pay attention to the order in which the three screws
between the fan and the mixture pipe are screwed in, as
per the numbering 3, 2 and 4 (¬ fig. 14.2).
> Remove the air intake pipe (¬ section 12.3.1).
> Remove the plug from the gas valve (7, ¬ fig. 14.2).
The plug on the fan motor has a latching lug
with which it engages in the slot. You have to
i
> Remove the plug (6, ¬ fig. 14.2) from the fan motor.
> Unscrew either the cap nut (2, ¬ fig. 14.3) from the gas
valve or the cap nut (8, ¬ fig. 14.2) between the gas
pipes.
> Secure the gas pipe against twisting by holding the pipe
against the spanner flat when undoing the cap nut.
> Unscrew the three screws (2-4, ¬ fig. 14.2) between the
mixture pipe (1, ¬ fig. 14.2) and the fan flange.
release the latching lug by pushing it in to pull
off the plug.
14.4 Secure the gas pipe against twisting
> Tighten the cap nut (2, ¬ fig. 14.3) on the gas valve and
the cap nut (8, ¬ fig. 14.2) between the gas pipes. Use
new seals.
> Secure the gas pipe against twisting (¬ fig. 14.4) by
holding the pipe against the spanner flat when tighten-
ing the cap nut.
> After completing the work, perform a gas-tightness
check and function check (¬ section 10.10).
> If you have fitted a new gas valve, adjust the gas setting
(¬ section 10.9).
14.4 Replacing the expansion vessel
> Drain the boiler (¬ section 12.2.2).
1
2
14.3 Removing the gas valve from the fan
> Remove the entire fan/gas valve unit from the boiler.
Installation and maintenance instructions ecoTEC pro 0020129672_05 59
Replacing components
14
1
1
2
2
3
4
3
14.5 Replacing the expansion vessel
> Loosen the screw connection (4) at the water connec-
tion on the underside of the expansion vessel.
> Remove both screws (1) on the support plate (2).
> Remove the support plate (2).
> Pull out the expansion vessel (3) from the front.
> Insert the new expansion vessel into the boiler.
> Screw the new expansion vessel to the water connection.
Use a new seal for this.
> Attach the support plate using both screws (1).
> If necessary, adjust the pressure to the static height of
the heating installation (¬ section 12.3.7).
> Fill and purge the boiler and, if necessary, the system
after installing the new expansion vessel
(¬ section 10.5).
> On completion of the work, check for water leaks.
14.5 Replacing the heat exchanger
Caution.
Risk of damage to the heat exchanger.
b
> You can neither loosen nor tighten the
four screws (¬ fig. 14.7, pos. 1).
14.6 Replacing the heat exchanger
> Detach the clamps (2, ¬ fig. 14.6) and (3, ¬ fig. 14.6)
from the flow connection and the return connection.
> Detach the flow connection from the heat exchanger.
> Detach the return connection from the heat exchanger.
> Remove two screws (1, ¬ fig. 14.6) from each of the two
brackets of the heat exchanger.
1
2
3
1
> Drain the boiler (¬ section 12.2.2).
> Remove the compact thermal module (¬ section 12.3.1).
> Detach the condensate discharge hose from the heat
exchanger.
14.7 Heat exchanger brackets
> Disconnect the plug connection (2, ¬ fig. 14.7) of the
thermal fuse in the heat exchanger.
> Remove the bottom three screws (3, ¬ fig. 14.7) from
the rear part of the heat exchanger bracket.
> Swivel the bracket around the top screw (1, ¬ fig. 14.7)
to one side.
> Pull the heat exchanger downwards and to the right, and
remove it from the boiler.
60 Installation and maintenance instructions ecoTEC pro 0020129672_05
Replacing components
14
Caution.
Risk of damage to the boiler.
b
> Install the new heat exchanger in the reverse order.
> Replace the seals.
> Insert the flow and return connections into the heat
exchanger as far as they will go.
Mineral oil-based lubricants may damage
the seals. The seals should therefore not be
lubricated.
> Only use water or commercially available
soft soap, if necessary, to assist with
installation.
Make sure that the brackets are seated correctly
on the flow and return connections.
i
> Reinstall the compact thermal module.
(¬ section 12.3.6).
> Fill and purge the boiler and, if necessary, the heating
installation (¬ section 10.5).
14.6 Replacing the PCB and/or the display
Danger!
Risk of death from electric shock!
e
Mains connection terminals L and N remain
live even if the continuous voltage on/off
switch is turned off.
> Before carrying out repair work on the
boiler, switch the boiler off using the on/
off button.
> Disconnect the boiler from the power
mains by disconnecting the mains plug
or by de-energising the boiler via a partition with a contact opening of at least
3 mm (e. g. fuses or power switches).
14.6.1 Replacing either the display or the PCB
> Replace the PCB or display according to the assembly
and installation instructions supplied.
If you are replacing only one of the two components (PCB
or display), the parametrisation functions automatically. By
switching on the boiler, the new component takes over the
previously set parameters from the unreplaced component.
14.6.2 Replacing the PCB and the display at the
same time
Setting the appliance type
> Set the correct value for the appliance type in accord-
ance with ¬ table 14.1 for diagnostic code D.093.
After confirmation, the display restarts itself automatically.
ecoTEC pro
24 (VUW GB 246/5-3) 7
28 (VUW GB 286/5-3) 8
14.1 Device specific numbers for the appliance types
The electronics are now set to the appliance type and the
parameters of all adjustable diagnosis codes are set to
default settings.
> Make the system-specific settings (¬ section 11).
Device specific
number (DSN)
Caution.
Risk of material damage caused by incor-
b
rect repairs.
Using an incorrect spare part display can
cause damage to the electronics.
> Before replacing, check that the correct
spare part display is available.
> ONLY fit the correct spare part display.
Comply with the assembly and installation
instructions provided with the spare parts.
i
Installation and maintenance instructions ecoTEC pro 0020129672_05 61
Decommissioning
15
15 Decommissioning
15.1 Temporarily shutting down the boiler
Caution.
Risk of frost damage due to incorrect
b
shutdown.
If you switch off the boiler using the on/off
switch or disconnect it from the power
mains, this can cause frost damage to the
heating installation.
> Only shutdown the boiler fully if the
heating installation is otherwise protected from frost.
> Drain the heating installation fully.
2
50
The boiler and its accessories must not be disposed of with
household waste.
> Make sure that the boiler and any existing accessories
are disposed of properly.
16 Guarantee and customer service
16.1 Factory guarantee
Two year guarantee for ecoTEC pro appliances
Vaillant provides this appliance with a parts and labour
guarantee against defects that may occur within twentyfour months of the installation date. For the 2nd year of the
guarantee to be valid an annual service must be carried out
by a competent person approved at the time by the Health
and Safety Executive one year after installation. The cost of
this annual service is not included in the guarantee.
Registering with us
Registration is simple. Just complete the Guarantee Registration Card and return to Vaillant within 30 days of installation. Your details will then be automatically registered
within the Vaillant scheme.
Note: No receipt will be issued.
15.1 Switching off the boiler
> Close the gas isolator cock.
> Close the cold water stop valve.
> Drain the heating installation fully
(¬ section 12.2.2).
> Press the on/off switch (1).
The display (2) goes off.
15.2 Taking the boiler permanently out of
service
> Close the gas isolator cock.
> Close the cold water stop valve.
> Drain the heating installation fully
(¬ section 12.2.2).
> Press the on/off switch (1).
The display (2) goes off.
> Isolate the boiler from the power mains.
> Dispose of the boiler correctly (¬ section 15.3).
Immediate help
If your Vaillant boiler develops a fault your first action
should be to contact your installer, as his professional
1
assessment is needed under the terms of our Guarantee. If
you are unable to contact your installer, phone Vaillant
Service Solutions: 0870 6060 777
16.2 Vaillant Service
To ensure regular servicing, it is strongly recommended
that arrangements are made for a Maintenance Agreement.
Please contact Vaillant Service Solutions
(0870 6060 777) for further details.
15.3 Disposing of the boiler
The Vaillant ecoTEC pro boiler consists primarily of materials that can be recycled.
62 Installation and maintenance instructions ecoTEC pro 0020129672_05
Technical data
g
g
g
prop
17 Technical data
ecoTEC pro Unit pro 24 (VUW GB 246/5-3) pro 28 (VUW GB 286/5-3)
Nominal heat output range P at 50/30 °C kW 5.7 - 19.9 6.9 - 25.7
Nominal heat output range P at 80/60 °C kW 5.2 - 18.9 6.2 - 24.4
Maximum heat output for hot water generation kW 23.4 28.6
Maximum heat input for hot water generation kW 23.7 28.9
Maximum heat input at the heating side kW 19.1 24.7
Minimum heat input G20 kW 5.5 6.6
Minimum heat input G31 kW — 8.7
Minimum heat output G31 kW — 8.2
Heating setting range kW 5 - 19 6 - 24
Heating
Max. flow temperature °C 85
Max. flow temperature setting range(factory setting: 75 °C) °C 30-80
Min. pressure for full operation MPa/bar 0.08/0.8
Permissible total over-pressure MPa/bar 0.3/3.0
Expansion vessel capacity l 8
Circulation water quantity (with reference to DT = 20 K)
Condensate rate approx. (pH value 3.5 – 4.0)
in heatin
Remaining feed head of pump (at nominal circulation water
volume)
DHW mode
Lowest water volume l/min 1.5
Water volume (at DT = 42 K)
Water volume (at DT = 35 K)
Water volume (at DT = 30 K)
Permitted overpressure MPa/bar 1.0/10.0
Required connection pressure MPa/bar 0.035/0.35
Hot water output temperature range °C 35-65
General
Boiler-side
Flow/return heating connections, boiler side mm 22
Connecting the hot and cold water, boiler side Inches G 3/4
Connector expansion relief valve (minimum) mm 15
Condensate discharge pipework (minimum) mm 19
Flue gas spigot mm 60/100 (concentric), optional 80/125 (concentric)
Gas connection pressure (gas inlet working pressure)
natural
Gas connection pressure (gas inlet working pressure)
Gas flow rate at 15 °C and 1013 mbar
(based on hot water generation if applicable) G20
G31
Flue gas mass flow min./max. g/s 2.5/10.6 3.0 (H gas); 3.9 (P gas)/13.0
Flue gas temperature min./max. °C 40/70 40/75
Certificated flue gas connections C13, C33, C43 , C53, C83, C83, B53P
NOx class 5
NOx mg/kWh 27.3 33.4
SEDBUK (2005) A
SEDBUK (2009) (G20/G31) 89.1/- 89.3/90.3
Boiler dimensions (H x W x D) mm 720 x 440 x 335
Mounting weight approx. kg 35 36
Electrical connection V/Hz 230/50
Built-in fuse 2 A, slow-blow
Electrical power consumption min./max. W 90/105
Standby electrical consumption W < 2 < 2
Level of protection IP X4 D
Certification number CE-0085CM0320
17.1 Technical data
mode 50 °C supply/30 °C return
as connection mm 15
as, G20
ane, G31
l/h 796 1032
l/h 1.9 2.5
MPa/bar 0.025/0.25
l/min 7.8 9.6
l/min 9.4 11.5
l/min 11.0 13.4
kPa/mbar 0.20/20
kPa/mbar 0.37/37
3
m
kg/h
/h
2.5
1.84
3.1
2.25
17
Installation and maintenance instructions ecoTEC pro 0020129672_05 63
Glossary
18
18 Glossary
Air/flue gas duct
An air/flue gas duct is a line system with two separate flow
channels. The flue gas is routed into separate chambers at
the same time as the required combustion air is pumped to
the boiler. The air/flue gas duct can be designed as a concentric or adjacent double flue gas pipe (the flue gas channel is sealed from the air channel). Floor-standing boilers
and gas-fired wall-hung boilers can be operated as roomsealed through the air/flue gas duct. As a result, boilers can
be installed in new buildings that do not offer sufficient
combustion air for open-flued heaters due to their airtight
construction.
Burner anti-cycling time
The burner is electronically locked for a specific time after
each time it is switched off ("restart interlock") to avoid frequent switching on and off of the burner (energy losses)
and to extend the working life of the boiler.
The burner anti-cycling time is only activated for the heating mode.
Hot water handling is not affected if burner anti-cycling
time is running.
Calorific value
Unlike the heating value, the calorific value of a fuel
describes the total useable heat during combustion, based
on the quantity of fuel used, including the condensation
heat in the steam.
The energy contained in steam can also be used if the
steam liquefies on cooling.
Digital information and Analysis system (DIA)
The Vaillant ecoTEC pro boiler is fitted with a digital information and analysis system (DIA). If additional settings are
required, which have not been configured using the installation assistant, you can view and modify further parameters
using the DIA.
eBUS
eBUS is an abbreviation for energyBUS. The eBUS is a special bus used in heating technology, which assists the communication between intelligent components in the heating
technology. In a Vaillant system, up to eight different heaters can be connected via the eBUS.
The eBUS communications protocol simplifies the controlrelated linking of different system components within a
heating installation. It provides particular flexibility for retrofitting and expanding the system. This simplifies the
installation of boiler cascades or the subsequent addition of
components such as solar hot water generation.
The eBUS provides extended facilities for connecting controllers.
Multi-functional module
The multi-functional module is an accessory that controls
additional functions or components in combination with
Vaillant boilers with eBUS electronics. It also allows you to
select and control 2 in 7, e. g. circulation pump, external
heating pump, external solenoid valve or response from the
flue non-return flap.
Compact thermal module
The compact thermal module is an assembly of Vaillant
condensing units that consists of the following four main
components in the ecoTEC pro: speed-regulated fan, gas-air
mixture fitting, gas supply (mixture pipe) for the premix
burner and premix burner
Condensing technology
Technology which maximises the use of the calorific value
of the fuel. The flue gas is cooled until the water vapour
that it contains condenses. The condensation heat that this
releases can also be used.
In particular, the flue gas losses are greatly reduced. The
losses from conduction of heat and radiation are also
reduced by the lower system temperatures. The entire heating installation should therefore be designed for low system
temperatures (flow/return temperature) for the effective
use of the calorific value. The level of efficiency attainable
for boilers is always given based on the heating value of the
gas. Due to the additional condensation heat used, the calculated values can exceed 100 %.
64 Installation and maintenance instructions ecoTEC pro 0020129672_05
19 Appendix
Installation,
Commissioning and
Appendix
19
Service Record
Installation and maintenance instructions ecoTEC pro 0020129672_05 65
Benchmark Log Book
18
Please affix the label from the
rear cover of the control box
over this area.
20 Benchmark Log Book
66 Installation and maintenance instructions ecoTEC pro 0020129672_05
0020008345-06
SERVICE INTERVAL RECORD
Benchmark Log Book
19
It is recommended that your heating system is serviced regularly
and that you complete the appropriate Service Interval Record Below .
Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service
as described in the boiler manufacturer’s instructions. Always use the manufacturer ‘s specified spare part when replacing all controls.
SERVICE 1 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
SERVICE 3 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
SERVICE 5 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Ye s N o
Ye s N o
Ye s N o
SERVICE 2 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
SERVICE 4 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
SERVICE 6 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Ye s N o
Ye s N o
Ye s N o
Signature
SERVICE 7 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
Ye s N o
SERVICE 9 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Installation and maintenance instructions ecoTEC pro 0020129672_05 67
Signature
Ye s N o
Signature
SERVICE 8 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
SERVICE 10 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Engineer ID Number
Comments
Signature
Ye s N o
Ye s N o
EC declaration of conformity
21
21 EC declaration of conformity
68 Installation and maintenance instructions ecoTEC pro 0020129672_05
Index
Index
A
Accessories.................................................................................... 12
Air/flue gas duct .................................................................. 23, 64
Air/flue system ............................................................................ 23
Article numbers ............................................................................ 4
B
Burner ............................................................................................. 51
Burner anti-cycling time ............................................. 42, 55, 64
C
Calorific value .............................................................................. 64
Checking
Burner ....................................................................................... 51
Connection pressure ............................................................. 35
Expansion vessel charge pressure .................................... 53
Function of boiler .................................................................. 36
Gas flow rate ........................................................................... 35
Heating mode .......................................................................... 37
Leaks ........................................................................................ 36
Scope of delivery .................................................................... 12
Circulation pump.................................................................. 28, 39
Commissioning ............................................................................. 31
Compact thermal module .................................................. 50, 64
Condensate discharge pipework .............................................. 21
Condensate trap ................................................................... 33, 52
Condensing technology ............................................................. 64
Connecting
Cold and hot water ................................................................. 21
Condensate discharge pipework ......................................... 21
Controller................................................................................. 27
Flow and return ....................................................................... 21
Gas line ..................................................................................... 19
Multi-functional module ....................................................... 28
Connection diagram ................................................................... 29
Connection measurements ....................................................... 16
Customer service ........................................................................ 62
D
Diagnosis codes....................................................... 38, 39, 40, 41
DIA system.................................................................................... 64
Disposal
Boiler ........................................................................................ 62
Packaging ................................................................................. 13
Domestic hot water cylinder ..................................................... 41
Draining
Boiler ........................................................................................ 50
Heating installation ............................................................... 50
E
eBUS .............................................................................................. 64
F
Fault codes ............................................................................ 55, 56
Fault memory ............................................................................... 55
Filling
Condensate trap .................................................................... 33
Heating installation ............................................................... 32
Hot water system .................................................................. 33
Filling pressure ............................................................................ 32
Fitting
Boiler ......................................................................................... 17
Controllers ............................................................................... 27
Front casing ............................................................................. 17
Side panel ................................................................................. 18
Flue gas system ........................................................................... 23
Frost protection ............................................................................ 10
G
Gas Council Number .................................................................... 4
Gas flow pressure ....................................................................... 35
Gas flow rate ................................................................................ 35
Gas setting.................................................................................... 34
H
Heating mode ............................................................................... 37
Heating water
Preparation ............................................................................... 9
69Installation and maintenance instructions ecoTEC pro 0020129672_05
Index
I
Installation clearance .................................................................. 15
Installation site ........................................................................ 8, 15
Installation template ................................................................... 15
Installer level ................................................................................ 30
L
Low loss header ........................................................................... 21
M
Mains connection ........................................................................ 26
Manufacturer’s guarantee ........................................................ 62
Minimum clearance ..................................................................... 15
Multi-functional module ............................................................ 64
O
Overview
Inspection and maintenance work .................................... 49
Parameters ................................................................. 39, 40, 41
Read-off and setting options .............................................. 30
Status codes .................................................................... 54, 55
R
Removing
Burner ...................................................................................... 58
Compact thermal module .................................................... 50
Display ....................................................................................... 61
Fan ............................................................................................. 59
Front casing ............................................................................. 17
Heat exchanger ...................................................................... 60
PCB ............................................................................................ 61
Side panel ................................................................................. 18
Repair ............................................................................................ 58
Replacement parts ..................................................................... 58
Reset .............................................................................................. 55
S
Setting
Burner anti-cycling time ...................................................... 42
By-pass valve .......................................................................... 43
Heating partial load .............................................................. 42
Maintenance interval ............................................................ 43
Maximum flow temperature ................................................ 42
Pump operating mode .......................................................... 42
Pump overrun ......................................................................... 42
Return flow temperature control....................................... 42
Unit type ................................................................................... 61
Status codes.......................................................................... 54, 55
P
Preparing
Electrical installation ............................................................ 26
Gas installation ....................................................................... 19
Hydraulic installation ............................................................ 20
Pump operating mode ........................................................ 39, 42
Pump overrun .............................................................................. 42
Purge
Heating installation ............................................................... 33
T
Test programs ............................................................................... 31
Type overview ................................................................................. 5
W
Water pressure ..................................................................... 33, 55
Water pressure sensor ................................................ 33, 55, 56
Wiring diagram ............................................................................ 29
70 Installation and maintenance instructions ecoTEC pro 0020129672_05
Supplier
Manufacturer
0020129672_05 GBIE 072013 – Subject to change
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