0020244995 05 ecoTEC pro

0020244995 05

Installation manual ecoTEC pro 24 & 28 installation ... - Vaillant

– Consult the installation manual for air/flue gas systems for more information about the other possibilities and associated accessories.

ecoTEC pro - Vaillant

2021-02-17 — Installation and maintenance instructions ecoTEC pro 0020244995 05 ... Vaillant appliances are manufactured to the very highest standard so we are pleased ...

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ecotec-pro-24-28-combi-installation-and-maintenance-instructions-2055535

ecoTEC pro
VUW ..6/5-3
en Installation and maintenance instructions

0020244995_05 - 17.02.2021

Installation and maintenance instructions
Contents

Safety .................................................................... 4

1.1 Intended use .......................................................... 4

1.2 Qualification ........................................................... 4

1.3 General safety information .................................... 4

1.4 Regulations (directives, laws, standards) .............. 6

1.5 List of relevant standards for Great Britain and Ireland.................................................................... 6

Guarantee and Customer Service ...................... 7

Technical data...................................................... 8

Notes on the documentation ............................ 11

Product description........................................... 11

5.1 CE marking .......................................................... 11

5.2 Energy Saving Trust Endorsed Products ............ 11

5.3 Hot Water Association ......................................... 11

5.4 Information on the identification plate.................. 11

5.5 Serial number ...................................................... 12

5.6 Product design..................................................... 12

5.7 Safety Devices..................................................... 12

Set-up.................................................................. 13

6.1 Checking the scope of delivery............................ 13

6.2 Dimensions .......................................................... 13

6.3 Installation site ..................................................... 14

6.4 Minimum clearances............................................ 14

6.5 Compartment Ventilation ..................................... 14

6.6 Air/flue pipe.......................................................... 14

6.7 Using the installation template............................. 17

6.8 Wall-mounting the product................................... 17

6.9 Removing/installing the front casing.................... 18

6.10 Removing/installing the side section ................... 18

Installation.......................................................... 19

7.1 Installation requirements ..................................... 19

7.2 Installing the gas connection ............................... 19

7.3 Checking the gas line for leak-tightness.............. 19

7.4 Installing the hot and cold water connection........ 20

7.5 Connecting the heating flow and heating return ................................................................... 20

7.6 Installing the drain pipe on the expansion relief valve .................................................................... 20

7.7 Connecting the condensate discharge pipe ........ 20

7.8 Flue installation.................................................... 23

7.9 Electrical installation ............................................ 23

Operation............................................................ 26

8.1 Operating concept ............................................... 26

8.2 Installer level overview......................................... 26

8.3 Calling up the installer level ................................. 26

8.4 Live Monitor (status codes) ................................. 26

8.5 Setting the hot water temperature ....................... 26

9 9.1 9.2
9.3 9.4 9.5 9.6 9.7
9.8 9.9 9.10 9.11 9.12
9.13 10
10.1 10.2 10.3 10.4 10.5 11 12 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 12.10 12.11 12.12
12.13
12.14 12.15 12.16 13 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 14 14.1 14.2

Start-up ............................................................... 27 Carrying out the initial start-up............................. 27 Checking and treating the heating water/filling and supplementary water .................................... 27 Filling the condensate trap .................................. 28 Switching the product on and off ......................... 28 Using check programmes .................................... 28 Preventing low water pressure ............................ 28 Flushing the heating installation for the first time ("cold") ......................................................... 28 Filling the heating installation .............................. 28 Purging the heating installation ........................... 29 Filling and purging the hot water system ............. 29 Gas inspection ..................................................... 29 Thoroughly flushing the heating installation ("hot")................................................................... 31 Checking leak-tightness ...................................... 31 Adapting the unit to the heating installation.......................................................... 31 Calling up diagnostics codes ............................... 31 Burner anti-cycling time ....................................... 31 Setting the maintenance interval ......................... 32 Setting the pump output....................................... 32 Setting the bypass valve...................................... 32 Handing over to the end user ........................... 33 Inspection and maintenance ............................ 34 Complete Service Interval Record section .......... 34 Using original seals.............................................. 34 Inspection and maintenance................................ 34 Preparing the maintenance work......................... 34 Removing the compact thermal module .............. 34 Cleaning the heat exchanger............................... 35 Checking the burner ............................................ 35 Cleaning the condensate trap.............................. 35 Cleaning the filter in the cold water inlet.............. 35 Installing the compact thermal module ................ 36 Draining the product ............................................ 36 Checking the pre-charge pressure for the internal expansion vessel .................................... 36 Checking the filling pressure of the heating installation............................................................ 36 Checking the quality of the heating water............ 36 Completing inspection and maintenance work .... 36 Checking the product for leak-tightness .............. 37 Troubleshooting ................................................ 37 Checking service messages ................................ 37 Eliminating faults.................................................. 37 Calling up and clearing the fault memory ............ 37 Resetting parameters to factory settings ............. 37 Preparing the repair work .................................... 37 Replacing defective components......................... 37 Completing repair work........................................ 39 Checking the product for leak-tightness .............. 39 Decommissioning.............................................. 39 Temporarily decommissioning the product.......... 39 Permanently decommissioning the product......... 39

Installation and maintenance instructions ecoTEC pro 0020244995_05

Recycling and disposal..................................... 39

Appendix ............................................................................ 40

Inspection and maintenance work ................... 40

Overview of diagnostics codes ........................ 41

Status codes Overview .................................. 45

Overview of fault codes .................................... 46

Check programmes Overview ....................... 48

Wiring diagrams................................................. 49

F.1 Product connection diagram with integrated hot water generation ............................................ 49

Commissioning Checklist................................. 50

Commissioning Flow Chart .............................. 54

Index ................................................................................... 55

0020244995_05 ecoTEC pro Installation and maintenance instructions

1 Safety

1.2 Qualification

1.1 Intended use
The product is intended as a heat generator for sealed heating installations and for domestic hot water generation.
Improper use of any kind is prohibited.

The person carrying out the work described here must have completed professional training. The competent person must demonstrably have all of the knowledge, skills and capabilities that are required in order to carry out the work mentioned below.

Intended use also includes the following:
use of the product only in mobile homes that are made, transported once and permanently situated in Great Britain and Ireland. After the transportation of the mobile home to its destination the complete product must be checked for leak-tightness again
validity of the product only for Great Britain and Ireland and for the gas types in Great Britain and Ireland as listed on the data plate
Installing and operating the product only in conjunction with accessories for the air/flue pipe which are listed in the other applicable documents and comply with the type of unit
Using the product while observing the accompanying operating, installation and maintenance instructions for the product along with all other components of the installation
Installing and setting up the product while observing the product and system approval
Observing all inspection and maintenance conditions listed in the instructions
Installing while observing the IP code
The following is classed as improper use:
Using the product in vehicles, such as mobile homes or caravans. Units that are not classed as vehicles are those that are installed in a fixed and permanent location (known as "fixed installation").
Any direct use in industrial or commercial processes
Any use other than those described in these instructions and any use that goes beyond what is described here

The following work must only be carried out by competent persons who are sufficiently qualified to do so:
Set-up Dismantling Installation Start-up Inspection and maintenance Repair Decommissioning
Proceed in accordance with current technology.
Use the correct tool.
The above-mentioned work must always only be carried out by persons with sufficient qualifications.
This product can be used by children over eight years old and also by persons with limited physical, sensory or mental capabilities or insufficient experience and/or knowledge if they are supervised or have been provided with instructions on how to safely use the product, and they understand the risks resulting from using the product. Children must not play with the product. Cleaning and user maintenance work must not be carried out by children unless they are supervised.
1.3 General safety information
The following sections convey important safety information. It is essential to read and observe this information in order to prevent risk of death, risk of injury, material damage or environmental damage.
1.3.1 Gas
If you smell gas:
Avoid rooms that smell of gas. If possible, open doors and windows fully
and ensure adequate ventilation. Do not use naked flames (e.g. lighters,
matches). Do not smoke.

Installation and maintenance instructions ecoTEC pro 0020244995_05

Do not use any electrical switches, mains plugs, doorbells, telephones or other communication systems in the building.
Close the emergency control valve or the main isolator.
If possible, close the gas stopcock on the product.
Warn other occupants in the building by yelling or banging on doors or walls.
Leave the building immediately and ensure that others do not enter the building.
Alert the police and fire brigade, and inform the emergency service department of the gas supply company as soon as you are outside the building.
1.3.2 Flue gas
Flue gases may cause poisoning, while hot flue gases may also cause burns. Flue gases must therefore never be allowed to escape uncontrollably.
What to do if you smell flue gas in the property:
Open all accessible doors and windows fully to provide ventilation.
Switch off the product. Check the flue gas routes in the product
and the flue gas diversions.
To prevent flue gas exit:
Only operate the product if the air/flue pipe has been completely installed.
With the exception of short periods for testing purposes, only operate the product when the front casing is installed and closed.
In order to operate the product, ensure that the condensate siphon is always full. Water seal level for units with condensate siphon (third-party accessory): 200 mm

To ensure that the combustion air supply is sufficient during open-flued operation:
Ensure that the air supply to the product's installation room is permanently unobstructed and sufficient in accordance with the relevant ventilation requirements. This also applies, in particular, for cupboard installations.
To prevent corrosion on the product and in the flue system:
Ensure that the combustion air supply is free from sprays, solvents, chlorinated cleaning agents, paint, adhesives, ammonia compounds, dust or similar substances.
Ensure that no chemical substances are stored at the installation site.
If you are installing the product in hairdressing salons, painter's or joiner's workshops, cleaning businesses or similar locations, choose a separate installation room in which the room air is technically free of chemical substances.
1.3.4 Electricity
The power supply terminals L and N remain live.
To prevent electric shocks, proceed as follows before working on the product:
Disconnect the product from the power supply by switching off all power supplies at all poles (electrical partition with a contact gap of at least 3 mm, e.g. fuse or circuit breaker) or remove the mains plug (if present).
Secure against being switched back on again.
Wait at least three minutes until the condensers have discharged.
Check that there is no voltage.

To ensure that the seals are not damaged:
Instead of grease, use only water or commercially available soft soap to aid installation.
1.3.3 Air supply
Unsuitable or insufficient combustion and room air may lead to material damage, but also to life-threatening situations.

1.3.5 Weight
To prevent injuries when transporting the product:
Make sure that the product is transported by at least two people.
To prevent material damage to the flexible gas pipe:
Never suspend the compact thermal module on the flexible gas pipe.

0020244995_05 ecoTEC pro Installation and maintenance instructions

1.3.6 Explosive and flammable substances
To prevent explosions and fire:
Do not use the product in storage rooms that contain explosive or flammable substances (such as petrol, paper or paint).

are any leaks. In this case, there is a risk of explosion.
Make sure that liquid gas cannot escape from the product or the gas pipe under any circumstances.

1.3.7 High temperatures
To prevent burns: Only carry out work on components once
they have cooled down.
To prevent material damage that is caused by heat transfer: Only solder connectors if the connectors
are not yet screwed to the service valves.

1.4 Regulations (directives, laws, standards)
Observe the national regulations, standards, directives, ordinances and laws.
1.5 List of relevant standards for Great Britain and Ireland
Observe the national regulations, standards, directives, ordinances and laws.

1.3.8 Heating water
Both unsuitable heating water and air in the heating water may cause material damage to the product and in the heat generator circuit.
Check the quality of the heating water. ( Page 27)
If you use non-diffusion-tight plastic pipes in the heating installation, ensure that no air gets into the heat generator circuit.

You can find a list of relevant standards at: https://www.vaillant.co.uk/standards

1.3.9 Neutralisation device
To prevent contamination of the waste water:
Check whether a neutralising unit must be installed in accordance with national regulations.
Observe local regulations on neutralising condensate.

1.3.10 Frost
To prevent material damage: Do not install the product in rooms prone
to frost.

1.3.11 Safety devices
Install the necessary safety devices in the installation.

1.3.12 Risk of death from leaks if the product is installed below ground level
Liquid gas accumulates at floor level. If the product is installed below ground level, liquid gas may accumulate at floor level if there

Installation and maintenance instructions ecoTEC pro 0020244995_05

2 Guarantee and Customer Service
Guarantee Registration
Thank you for installing a new Vaillant appliance in your home. Vaillant appliances are manufactured to the very highest standard so we are pleased to offer our
customers a comprehensive guarantee. To maintain your guarantee, the boiler must be serviced annually by a competent person who holds the required qualifications in accordance with the rules in force of the country where the
product is installed and in accordance with the manufactures recommendations. We recommend you complete your guarantee registration as soon as possible.
Sales Support: Telephone: 0345 602 0262
Technical Enquiries: Telephone: 0344 693 3133 Email: technical@vaillant.co.uk
General Enquiries: Telephone: 0345 602 2922
Training Enquiries: Telephone: 0345 601 8885 Email: training.enquiriesuk@vaillant-group.com
Spares Enquiries: Telephone: 01773 596 615 To register your Vaillant appliance visit: https://self-service.vaillant.co.uk/warranty-registration
Vaillant is a licensed member of the Benchmark Scheme. Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer's instructions by a competent person approved at the time by the Health and Safety Executive and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future reference. Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme. Benchmark is managed and promoted by the Heating and Hotwater Industry Council.

0020244995_05 ecoTEC pro Installation and maintenance instructions

3 Technical data

Technical data General

Designated country (designation in accordance with ISO 3166)
Approved unit categories
Gas connection, boiler side
Flow/return heating connections, boiler side
Hot and cold water connection, boiler side
Expansion relief valve connection pipe (min.)
Air/flue gas connection

VUW 246/53 (H-GB) ecoTEC pro 24 GB (Great Britain), IE (Ireland) II2H3P 15 mm
22 mm
G 3/4
15 mm
60/100 mm

Condensate drain pipework (min.)
G20 natural gas flow pressure
G31 propane gas flow pressure

19 mm
2.0 kPa (20.0 mbar)

Gas flow rate at 15 °C and 1013 mbar (based on domestic hot water generation, if applicable), G20
Gas flow rate at 15 °C and 1013 mbar (based on domestic hot water generation, if applicable), G31
Min. flue gas mass flow rate (G20)
Min. flue gas mass flow rate (G31)
Max. flue gas mass flow rate
Min. flue gas temperature

2.5 m³/h

2.47 g/s 10.8 g/s 40

Max. flue gas temperature Approved gas-fired units
30% efficiency

70
C13, C33, C43, C53 109.4 %

NOx class

Test symbol/registration no.
SAP 2009/2012 annual efficiency (%)
Boiler dimension, width

CE 0085CM0320 89.5 %
440 mm

Boiler dimension, height 720 mm

Boiler dimension, depth 338 mm

Approx. net weight

38 kg

VUW 286/53 (H-GB) ecoTEC pro 28 GB (Great Britain), IE (Ireland) II2H3P 15 mm
22 mm
G 3/4
15 mm
60/100 mm 19 mm
2.0 kPa (20.0 mbar)
2.9 m³/h

2.47 g/s

12.6 g/s
40 70
C13, C33, C43, C53 109.4 % 6 CE 0085CM0320 89.5 %
440 mm 720 mm 338 mm 38 kg

VUW 286/53 (P-GB) ecoTEC pro 28 GB (Great Britain), IE (Ireland) II2H3P 15 mm
22 mm
G 3/4
15 mm
60/100 mm 19 mm

3.7 kPa (37.0 mbar)
2.2 kg/h

3.49 g/s
12.6 g/s
40 70
C13, C33, C43, C53 108 % 6 CE 0085CM0320 89.7 %
440 mm 720 mm 338 mm 38 kg

Installation and maintenance instructions ecoTEC pro 0020244995_05

Technical data G20 power/loading G20

Nominal heat output range P at 50/30 °C
Nominal heat output range P at 80/60 °C
Maximum heat output for domestic hot water generation
Maximum heat input for domestic hot water generation
Maximum heat input, heating side
Minimum heat input

VUW 246/53 (H-GB) ecoTEC pro 24
5.9 to 24.8 kW

VUW 286/53 (H-GB) ecoTEC pro 28
5.9 to 25.9 kW

5.2 to 23.0 kW 5.2 to 24.0 kW

23.4 kW

27.0 kW

23.7 kW

27.5 kW

23.5 kW 5.5 kW

24.5 kW 5.5 kW

Heating adjustment range 5 to 19 kW

5 to 19 kW

Nominal heat input efficiency (stationary) at 40/30 °C
Nominal heat input efficiency (stationary) at 50/30 °C
Nominal heat input efficiency (stationary) at 60/40 °C
Nominal heat input efficiency (stationary) at 80/60 °C

107.0 % 106.0 % 101.0 % 98.0 %

Technical data Power/loading G31

VUW 286/53 (P-GB) ecoTEC pro 28 7.9 to 25.3 kW
7.2 to 24.0 kW
27.0 kW
27.5 kW
24.5 kW
7.7 kW

105.0 % 103.0 % 101.0 % 98.0 %

0020244995_05 ecoTEC pro Installation and maintenance instructions

Technical data Heating

Maximum flow temperature
Max. flow temperature adjustment range (default setting: 75 °C)
Permissible total excess pressure
Minimum pressure for full operation
Expansion vessel capacity
Circulation water volume (with reference to T= 20 K)
Approx. condensate rate (pH value 3.5 to 4.0) in 50/30 °C heating mode
Remaining feed head of pump (at nominal circulation water volume)

VUW 246/53 (H-GB) ecoTEC pro 24 85
30 to 80
0.25 MPa (2.50 bar) 0.08 MPa (0.80 bar) 10 l
813 l/h
1.9 l/h
0.025 MPa (0.250 bar)

VUW 286/53 (H-GB) ecoTEC pro 28 85
30 to 80
0.25 MPa (2.50 bar) 0.08 MPa (0.80 bar) 10 l
813 l/h
1.9 l/h
0.025 MPa (0.250 bar)

Technical data Hot water handling mode

Lowest water volume

VUW 246/53 (H-GB) ecoTEC pro 24
2.0 l/min

VUW 286/53 (H-GB) ecoTEC pro 28
2.0 l/min

Water volume (at T = 30 K) Water volume (at T = 35 K) Water volume (at T = 42 K) Permitted overpressure
Required connection pressure
Hot water output temperature range

11.2 l/min
9.6 l/min
8.0 l/min
1.0 MPa (10.0 bar) 0.035 MPa (0.350 bar) 35 to 65

13 l/min
11.1 l/min
9.3 l/min
1.0 MPa (10.0 bar) 0.035 MPa (0.350 bar) 35 to 65

Technical data Electrics

Electric connection

VUW 246/53 (H-GB) ecoTEC pro 24
230 V/50 Hz

Permissible connected voltage

190 to 253 V

Built-in fuse (slow-blow) 2 A

Min. electrical power consumption
Max. electrical power consumption
Standby electrical power consumption
Level of protection

35 W 80 W <2W IP X4 D

VUW 286/53 (H-GB) ecoTEC pro 28 230 V/50 Hz 190 to 253 V
2A 35 W
85 W
<2W
IP X4 D

VUW 286/53 (P-GB) ecoTEC pro 28 85
30 to 80
0.25 MPa (2.50 bar) 0.08 MPa (0.80 bar) 10 l
813 l/h
1.9 l/h
0.025 MPa (0.250 bar)
VUW 286/53 (P-GB) ecoTEC pro 28 2.0 l/min 13 l/min
11.1 l/min
9.3 l/min
1.0 MPa (10.0 bar) 0.035 MPa (0.350 bar) 35 to 65
VUW 286/53 (P-GB) ecoTEC pro 28 230 V/50 Hz 190 to 253 V
2A 35 W
85 W
<2W
IP X4 D

Installation and maintenance instructions ecoTEC pro 0020244995_05

4 Notes on the documentation

Always observe all operating instructions enclosed with
the installation components.
Store these instructions and all other applicable docu-
ments for further use.

These instructions apply only to:

Product article number

VUW 246/5-3 (H-GB) ecoTEC pro 24
VUW 286/5-3 (H-GB) ecoTEC pro 28
VUW 286/5-3 (P-GB) ecoTEC pro 28

Article number
0010021836

Gas Council Number
47-044-88

0010021837 47-044-89

0010021838 47-044-90

5.3 Hot Water Association Vaillant is a full member of the Hot Water Association and promotes the scheme in association with its cylinder range. Details are available on the web site www.vaillant.co.uk
5.4 Information on the identification plate The identification plate is mounted on the underside of the product in the factory.
Information on the Meaning data plate

5 Product description
5.1 CE marking
The CE marking shows that the products comply with the basic requirements of the applicable directives as stated on the data plate. The declaration of conformity can be viewed at the manufacturer's site.
5.2 Energy Saving Trust Endorsed Products
Only the most energy efficient products can carry the `Energy Saving Trust Endorsed Product' brandmark making it easy for consumers to choose products that have met strict energy performance criteria. Available for: Boilers, Heating controls and chemical inhibitors, the Energy Saving Trust endorsed product brandmark gives consumers confidence that a product will cost less to run, help lower energy bills and reduce carbon emissions. About the Energy Saving Trust Energy Saving Trust is an independent and impartial organisation that provides trusted energy saving advice to empower millions of people to lead affordable, low energy lifestyles. For more information visit energysavingtrust.org.uk

VUW...
..6/5-3
ecoTEC pro 2H, G20 20 mbar (2.0 kPa) ww/yyyy Cat. Types PMS
PMW
Tmax. ED 92/42
V Hz W IP
P Q D

Read the instructions.
Vaillant gas-fired wall-hung boiler for heating and domestic hot water generation Gross calorific value power/product generation equipment Product designation Gas group and gas connection pressure as set at the factory Date of manufacture: Week/year Permissible gas categories Approved gas-fired units Permissible total overpressure in heating mode Permissible total overpressure during domestic hot water generation Max. flow temperature Current efficiency directive fulfilled with 4* rating Mains voltage and mains frequency Max. electrical power consumption IP rating Heating mode
Domestic hot water generation
Nominal heat output range Heat input range Nominal domestic hot water draw-off rate Barcode with serial number, 7th to 16th digit = product article number

Note
Make absolutely sure that the product is compatible with the gas group at the installation site.

0020244995_05 ecoTEC pro Installation and maintenance instructions

5.5 Serial number The serial number can be found on a plastic label at the bottom of the front casing and on the identification plate.
5.6 Product design 5.6.1 Functional elements, product with
integrated domestic hot water generation

10 11

17 16

1 Gas valve assembly
2 Water pressure sensor
3 Heat exchanger
4 Connection for the air/flue pipe
5 Flue gas analysis point
6 Expansion vessel
7 Air intake pipe
8 Compact thermal module
9 Ignition electrode
10 Fan

11 Automatic air vent
12 Manometer
13 Internal pump
14 Prioritising diverter valve
15 Expansion relief valve
16 Electronics box
17 Impeller sensor (domestic hot water)
18 Bypass valve
19 Secondary heat exchanger

5.7 Safety Devices
5.7.1 Electrical Supply Failure
The boiler will not work without an electrical supply. Normal operation of the boiler should resume when the electrical supply is restored.
Reset any external controls, to resume normal operation of the central heating.
If the boiler does not resume normal operation press the reset button. If the boiler does not resume normal operation after this call your Installation/Servicing company or Vaillant service.
5.7.2 Overheating Safety
The boiler software is designed to recognise the potential for an overheat lockout and will shutdown before this happens. To restart the boiler, press the reset button on the boiler interface.
If the boiler fails to resume normal operation and all external controls are calling for heat, then call your Installation/ Servicing company or Vaillant service.
5.7.3 Frost protection
The appliance has a built in frost protection device that protects the boiler from freezing. With the gas and electric supplies ON and irrespective of any room thermostat setting, the frost protection device will operate the pump when the temperature of the boiler water falls below 12 °C.
A timer is used so that the temperature can be checked periodically. After 10 minutes the pump will be stopped if the temperature is higher than 10 °C or has already reached 35 °C. The burner will activate if the boiler temperature does not reach 10 °C after 30 minutes or at any time if the temperature drops to 5 °C.
The burner will switch off when the temperature reaches 35 °C.
5.7.4 Condensate Drain Blockage
As a safety feature the boiler will stop working if the condensate drain becomes blocked. During freezing conditions this may be due to the forming of ice in the condense drain external to the house. Release an ice blockage by the use of warm cloths on the pipe. After pressing reset the boiler should restart.

Installation and maintenance instructions ecoTEC pro 0020244995_05

125 180 338

6 Set-up

6.2 Dimensions

6.1 Checking the scope of delivery
Check that the scope of delivery is complete and intact.

3 45

6.1.1 Scope of delivery

Number 1 1 1 1 1 4 3 1 1 1

Designation
Heat generator Installation set containing the following: - Unit mounting bracket - Expansion relief valve connection pipe - Domestic hot water connection pipe - Service valve - Bag with small parts Mounting template Condensate discharge hose Enclosed documentation

440

11 10
1 2

720 A
624 20

100 100

188

3 4 5 6 7
8

160 125

1 Air/flue pipe wall duct
2 Unit mounting bracket
3 Heating flow (22 × 1.5 diameter)
4 Domestic hot water connection (15 × 1.5 diameter)
5 Gas connection (15 × 1.5 diameter)
6 Cold water connection (15 × 1.5 diameter)

7 Heating return (22 × 1.5 diameter)
8 R1 tundish/condensate trap connection
9 Air/flue pipe connection
10 Condensate discharge connection, 19 mm diameter
11 Condensate trap
12 Drain pipework connection, expansion relief valve, heating, 15 mm diameter

0020244995_05 ecoTEC pro Installation and maintenance instructions

Consult the installation template that is supplied to find the dimension A.
6.3 Installation site
This boiler is not suitable for outdoor installation. This boiler may be installed in any room. However if the boiler is being installed in a room containing a bath or shower it must only be installed in zones 2 or 3. In GB this is the current I.E.E. WIRING REGULATIONS and BUILDING REGULATIONS. In IE reference should be made to the current edition of I.S.813 "Domestic Gas Installations" and the current ETCI rules.
If the boiler is to be installed in a timber frame building it should be fitted in accordance with the current version of the Institute of Gas Engineers document IGE/UP/7. If in doubt seek advice from local gas undertaking or the manufacturer.

6.6 Air/flue pipe 6.6.1 Regulation Different flue outlet configurations can be carried out. Consult the installation manual for air/flue gas systems
for more information about the other possibilities and associated accessories.
Minimum fall 44 mm/m

6.4 Minimum clearances

C
A B C D

Minimum clearance
165 mm: Air/flue pipe, 60/100 mm diameter 275 mm: Air/flue pipe, 80/125 mm diameter 180 mm; optimum approx. 250 mm
5 mm; optimum approx. 50 mm
500 mm in front of the heat generator to enable easy access for maintenance work (may be provided by an opening door).

Standard flue terminal kits have an in-built fall back to the boiler to drain the condensate. These can be fitted level between the appliance and the termination position. All other extended flues must have a fall of at least 44 mm/m.
The maximum length of the flue outlet is defined according to its type (for example C13).
Whatever the kind of flue system chosen, observe the minimum distances to position the flue terminals.
To install the flue, refer to the separate flue instruction supplied with your appliance.
Explain these requirements to the user of the appliance.
In GB the minimum acceptable siting dimensions for the terminal from obstructions, other terminals and ventilation openings are shown in diagram overleaf.
In IE the minimum distances for flue terminal positioning must be those detailed in I.S. 813 "Domestic Gas Installations".
The terminal must be exposed to the external air, allowing free passage of air across it at all times.
Being a condensing boiler some pluming may occur from the flue outlet. This should be taken into consideration when selecting the position for the terminal.

It is not necessary to maintain a clearance between the product and components made of combustible materials that go beyond the minimum clearances.

6.5 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 not required as the products are only certified, and can only be fitted with a concentric flue system.

Installation and maintenance instructions ecoTEC pro 0020244995_05

6.6.2 Position of the air/flue terminal

Ba Z

Aa W

VM S
Boundary
X AF Y Boundary

J JH

U Q

G C
B

6.6.2.1 Positioning the terminal of a fan-supported flue system

Installation site

Dimensions

A Adjacent to a boundary.

300 mm

1)
B

The dimension below eaves, balconies and car ports can be reduced to this value, as long as the flue terminal is extended to clear any overhang. External flue joints must be sealed with a suitable silicon sealant.

25 mm

C Between a vertical flue terminal and a window or dormer window on a roof.

1,500 mm

D Between terminals facing each other.

1,200 mm

E Vertical flue clearance, adjacent to a boundary line.

2) Distance to a boundary line, unless it will cause a nuisance. BS 5440:Part 1 recommends that care is taken F when siting terminal in relation to boundary lines.

G Minimum clearance from a skylight to a vertical flue or to another vertical flue.

Vertical flue clearance, to noncombustible building material. H
Vertical flue clearance to combustible building material.

J Above, below and either side of an opening door, air vent or opening window.

K Diagonally to an opening door, air vent or opening window.

2)
L

To an internal or external corner.

Below a Velux window. M
Above or to either side of the Velux window.

From a pitched roof. N
In regions with heavy snowfall.

P From vertical drain pipes and soil pipes.

Below eaves. Q
Below gutters, pipe and drains.

1) There should be no ventilation/opening in the eaves within 300 mm distance of the terminal.
2) These dimensions comply with the building regulations, but they may need to be increased to avoid wall staining and nuisance from pluming depending on site conditions.

300 mm
600 mm
Min. 300 mm 500 mm 1,500 mm 300 mm 600 mm 200 mm 2,000 mm 600 mm 400 mm 500 mm 25 mm 200 mm 75 mm

Terminals must be positioned so to avoid combustion products entering the building. Support the flue at approximately one metre intervals and at a change of direction, use suitable brackets and
fixings. Installations in car ports are not recommended. The flue cannot be lower than 1 metre from the top of a lightwell due to the build up of combustion products. Dimensions from a flue terminal to a fanned air inlet to be determined by the ventilation equipment.

0020244995_05 ecoTEC pro Installation and maintenance instructions

Installation site

Dimensions

25 mm

S Above adjacent ground or balcony.

300 mm

2)
T

Distance to a surface facing a terminal, unless it will cause a nuisance. BS 5440: Part 1 recommends that care

is taken when siting terminals in relation to surfaces facing a terminal.

600 mm

U Clearance alongside another terminal.

300 mm

V Above roof level. W Minimum to vertical structure on roof, roof vent.

300 mm Min. 300 mm

X Minimum to opening in adjacent building. Y Minimum at an angle to a boundary which is not less than 300 mm to the terminal

Min. 2000 mm
Min. 600 mm

Z Minimum measured to the nearest corner of the OPEN window

Min. 600 mm

Aa No more than this value above ridge. Ba Not less than this value below the opening window

Max. 300 mm
Min. 300 mm

6.6.2.2 Horizontal terminal positioning
BS 5440-1 recommends that fanned flue chimney terminals 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 directed to discharge directly across a boundary if the products are likely to cause a nuisance to a neighbour or discharge over a walkway or patio. For IE see current issue of IS 813. For boilers covered within this manual. Dimensions B and R: 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 below.

Balcony/eaves

Gutter

Adequately secured The flue pipe must

air/flue gas pipe

protrude beyond any overhang

You can use a plume management kit to enable the termination point to be positioned and directed away from the building fabric.

Installation and maintenance instructions ecoTEC pro 0020244995_05

6.6.3 Flue Configuration Description
6.6.3.1 Horizontal Concentric Flue 60/100 mm or 80/125 mm (C13 type installation)

6.6.3.3 Vertical Concentric Flue 60/100 mm or 80/125 mm (C33 type installation)

1 Gasket (fitted)

Note If the terminal is at less than 1.80 m from the ground, you must install a terminal protection kit.
Consult the separate installation manual for air/flue gas systems supplied with your appliance for all possibilities and associated accessories and how to install the flue system.
6.6.3.2 Terminal protection

Consult the separate installation manual for air/flue gas systems supplied with your appliance for all possibilities and associated accessories and how to install the flue system.
6.7 Using the installation template
Use the installation template to ascertain the locations at
which you need to drill holes and make breakthroughs.
6.8 Wall-mounting the product
1. Check the load-bearing capacity of the wall. 2. Note the total weight of the product. 3. Only use fixing material that is permitted for the wall. 4. If required, ensure that mounting apparatus on-site has
sufficient load-bearing capacity. 5. Wall-mount the product as described.

A terminal guard is required if persons could come into contact with the terminal or the terminal could be subject to damage.

If a terminal guard is required, it must be positioned to provide minimum of 50 mm clearance from any part of the terminal and be central over the terminal.

The guard should be similar to that shown in the figure.

6. Install the product bracket (1) on the wall.
7. Hang the product on the product bracket from above using the hanging bracket.

0020244995_05 ecoTEC pro Installation and maintenance instructions

6.9 Removing/installing the front casing 6.9.1 Removing the front casing

6.10 Removing/installing the side section 6.10.1 Removing the side section
2x
B

Remove the front casing as shown in the illustration.
6.9.2 Installing the front casing
Refit the components in the reverse order.

A
D
Caution. Risk of material damage caused by mechanical deformation. Removing both side sections may cause mechanical distortion in the product, which may cause damage to the piping, for example, and potentially result in leaks.
Always only remove one side section
never both side sections at the same time.
Remove the side section as shown in the illustration.
6.10.2 Installing the side section
Refit the components in the reverse order.

Installation and maintenance instructions ecoTEC pro 0020244995_05

7 Installation
7.1 Installation requirements
7.1.1 Information on the gas group
In the as-supplied condition, the product is preset for operation with the gas group indicated on the data plate.
7.1.2 Purging the liquid gas tank
If the liquid gas tank is not purged properly, this may result in ignition problems.
Ensure that the liquid gas tank has been purged properly
before installing the product.
If required, contact the filler or the liquid gas supplier.

upstream of the product before you carry out the gas tightness test. 13. If, during gas tightness tests, you have closed the gas stopcock that is installed upstream of the product, relieve the gas line pressure before you open this gas stopcock.
7.1.5 Descaling the water
Scale deposition increases as the water temperature increases.
Descale the water as required.
7.2 Installing the gas connection

7.1.3 Using the correct gas type
Using the incorrect gas type may cause fault shutdowns in the product. Ignition and combustion noise may occur in the product.
Only use the gas type listed on the data plate.

7.1.4 Preparing for installation
1. Make sure that the existing gas meter is capable of passing the rate of gas supply required.
2. Consider the maximum heat output given in DHW mode.
3. Install a system separator (to be provided on-site) directly on the cold water connection for the combi boiler.
4. Install the following components: Draining cocks at the lowest points in the heating installation ( current version of "BS 2879") A stopcock on the cold water connection A stopcock in the gas pipe
5. Check that the volumetric capacity of the expansion vessel is sufficient for the system volume.
Condition: The volume of the installed expansion vessel is insufficient
Install an additional expansion vessel, connected as
close to the product as possible, in the heating return.
Condition: External expansion vessel installed and warm start active
Install a non-return valve in the product outlet (heating
flow) or decommission the internal expansion vessel in order to prevent the warm start function from being increasingly activated due to backflow.
6. Install the connection pipes such that they are free from mechanical stress.
7. If you use non-diffusion-tight plastic pipes in the heating installation, ensure that no air gets into the heat generator circuit.
8. Only solder connectors if the connectors are not yet screwed to the service valves.
9. Only bend connection pipes if they have not yet been connected to the product.
10. Flush the heating installation thoroughly before installing the product.
11. If, during gas tightness tests, you also place the gas pipes and the gas valve assembly in the product under pressure, use a max. test pressure of 11 kPa (110 mbar).
12. If you cannot limit the test pressure to 11 kPa (110 mbar), close any gas stopcocks that are installed

1. Install the gas pipe in accordance with the recognised rules of technology.
2. Connect the product to the gas line as shown in accordance with the recognised rules of good engineering practice.
3. Remove the residues from the gas line by blowing through the gas line beforehand.
4. Purge the gas line before start-up.
7.3 Checking the gas line for leak-tightness
Check the entire gas line properly for leak-tightness.

0020244995_05 ecoTEC pro Installation and maintenance instructions

7.4 Installing the hot and cold water connection

1. Make the water connections as shown in accordance with the relevant standards.
2. Ensure correct water pressure and flow requirements and that any expansion can be accommodated with the cold supply pipe work.
7.5 Connecting the heating flow and heating return

2. Install the drain pipe as shown (do not shorten). 3. Make sure that the end of the pipe is visible. 4. Ensure that discharged water or steam cannot cause
injury to persons or damage to electronic components. 5. Ensure the discharge pipe work is installed, routed and
terminated correctly to minimise the risk of freezing up.
7.7 Connecting the condensate discharge pipe
Danger! Risk of death from escaping flue gases!
The condensate drain pipework for the siphon must not be connected tightly to wastewater piping because, otherwise, the internal condensate trap may be drained fully and flue gas may escape.
Do not connect the condensate drain
pipework tightly to the waste-water piping.

Make the heating connections as shown in accordance
with the relevant standards.
7.6 Installing the drain pipe on the expansion relief valve
1. Install the drain pipe for the expansion relief valve so that it does not interfere with the removal and fitting of the lower section of the condensate trap.

min. 180
1
2
3
The product is equipped with a condensate trap (2).
Follow the instructions listed here and observe directives
and local regulations on condensed water discharge.
If you cannot guarantee that the materials from which the
condensate discharge pipe is made are suitable, install a system to neutralise the condensate.
Connect the condensate discharge (1) to a condensate
discharge pipe (3) that has a minimum internal diameter of 19 mm (30 mm internal diameter for all external pipes that are fed out of the building) and is made from an acidresistant material (e.g. plastic overflow pipe).

Installation and maintenance instructions ecoTEC pro 0020244995_05

The condensate discharge pipework must have a continuous fall (45 mm per metre) and should whenever possible terminate at a suitable discharge point within the heated envelope of the building that will remain frost free under long periods of low external temperatures.

7.7.1.2 Direct connection to external soil and vent stack

Note
Ensure that the connection between the condensate discharge pipe and the drain hose is not air-tight.

3 m

Ø22mm

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.
Ensure that the condensate discharge pipe terminates in
a suitable location. Further information can be obtained from BS 6798 Specification for installation of gasfired boilers of rated input not exceeding 70 kW net.
Leave an installation space of at least 180 mm beneath
the condensate trap.

Ø 32mm
7.7.1.3 External termination to gulley or hopper

3 m

Ø22mm

7.7.1 Condensate discharge systems
It is not necessary to provide extra traps in the discharge pipe as there is already a trap inside the boiler. Fitting an extra trap may cause the boiler siphon to work incorrectly. Refer to BS5546 or BS6798 for further advice on disposal of boiler condensate.
7.7.1.1 Direct Connection to internal soil and vent stack

Ø 32mm
Best practice 7.7.1.4 Internal termination into combined sink
waste

100mm

Ø22mm

3 m

Ø32mm

Ø22mm

Preferred option

Preferred option for external termination

0020244995_05 ecoTEC pro Installation and maintenance instructions

7.7.1.5 External termination into soakaway

7.7.1.7 External termination into rain water down pipe

Ø32mm 3 m
< 500 mm

1 100 mm

Ø22mm

3 m

< 25 < 300 mm 50 25 25

Ø 32mm

Ø12 3

4 NB only combined foul/rainwater drain
5

25 7.7.1.8 Additional methods of introducing air breaks

1 Ground (either/or)

4 Bottom of sealed tube

2 Seal

5 Limestone chippings

3 Plastic tube,

6 Hole depth 400 mm

100 mm diameter

minimum

Least preferred option, must not terminate in rain water drain

7.7.1.6 Internal termination downstream of sink waste

3 m

Ø22mm

100mm

Ø32mm

2
1 Air break 2 Using a tundish

3 3 Using a pipe

7.7.1.9 Connection of condensate pump

Open end of pipe direct into gulley below ground level but above water level
Susceptible to siphonage, must terminate in a gulley

Ø32mm

Ø22mm

3 m

Preferred option for external connection

Installation and maintenance instructions ecoTEC pro 0020244995_05

7.8 Flue installation
7.8.1 Installing and connecting the air/flue pipe
1. You can find out which air/flue pipes may be used by consulting the enclosed set-up instructions for the air/flue system.
2. Observe the information on positioning the air/flue terminal.
Condition: Installation in damp rooms
You must connect the product to a room-sealed air/flue
system. The combustion air must not be taken from the installation site.

7.8.2.2 Installing the connection piece for the air/flue pipe, 80/125 mm diameter
1. Remove the connection piece for the air/flue pipe this is installed at the factory. ( Page 23)
2. Insert the alternative connection piece. In doing so, pay attention to the latching lugs.
3. Turn the connection piece clockwise until it clicks into position.
7.9 Electrical installation
The electrical installation must only be carried out by a qualified electrician.

Caution. Risk of poisoning due to escaping flue gas.
Mineral-oil-based greases can damage the seals.
Instead of grease, use only water or com-
mercially available soft soap to aid installation.
3. Install the air/flue pipe using the set-up instructions.
7.8.2 Replacing the connector for the air/flue pipe as required
1. Replace the connector for the air/flue pipe as required. The product-specific standard equipment is listed under Technical data.
2. Remove the connection piece for the air/flue pipe this is installed at the factory. ( Page 23)
3. If required, install the connection piece for the air/flue pipe, 80/125 mm diameter. ( Page 23)

7.9.1

Danger! Risk of death from electric shock!
Power supply terminals L and N remain live even if the on/off button is switched off:
Disconnect the product from the power
supply by switching off all power supplies at all poles (electrical partition with a contact gap of at least 3 mm, e.g. fuse or circuit breaker).
Secure against being switched back on
again.
Wait for at least 3 minutes until the capa-
citors have discharged.
Check that there is no voltage.
Opening the electronics box

7.8.2.1 Removing the connection piece for the air/flue pipe

1. 2.

Open the electronics box as shown in the illustration.

7.9.2 Carrying out the wiring

1. Insert a screwdriver into the slot between the measuring stub pipes.

Caution.

2. Press the screwdriver carefully down (1.).

Risk of material damage caused by incor-

3. Turn the connection piece anticlockwise (2.) as far as it

rect installation.

will go and then remove it by pulling it upwards (3.).

Mains voltage at incorrect terminals and plug

terminals may destroy the electronics.

Do not connect any mains voltage to the
eBUS terminals (+/-).
Only connect the mains connection cable
to the terminals marked for the purpose.

0020244995_05 ecoTEC pro Installation and maintenance instructions

1. Route the connection cables of the components to be connected through the grommet provided on the underside of the product on the left.
2. Use strain reliefs. 3. If required, shorten the connection cables.
30 mm
4. Strip the flexible line as shown in the figure. In doing so, ensure that the insulation on the individual conductors is not damaged.
5. Only strip inner conductors just enough to establish good, sound connections.
6. To avoid short circuits resulting from loose individual wires, fit conductor end sleeves on the stripped ends of the conductors.
7. Screw the respective plug to the connection cable. 8. Check whether all conductors are sitting mechanically
securely in the terminals of the plug. Remedy this if necessary. 9. Plug the plug into the associated PCB slot; see the wiring diagram in the appendix.
7.9.3 Establishing the power supply
Caution. Risk of material damage due to high connected voltage.
At mains voltages greater than 253 V, electronic components may be damaged.
Make sure that the rated voltage of the
mains is 230 V.
1. Observe all valid regulations. 2. Make sure that the nominal mains voltage is 230 V. 3. Provide one common power supply for the boiler and
for the corresponding control: Power supply: Single-phase, 230 V, 50 Hz Fuse protection: 3 A 4. Do not interrupt the mains supply with a time switch or programmer. 5. Open the electronics box. ( Page 23) 6. Connect the product using a fixed connection and an electrical partition with a contact gap of at least 3 mm (e.g. fuses or power switches). 7. Isolation should preferably be by a double pole switched fused spur box having a minimum contact separation of 3 mm on each pole. The fused spur box should be readily accessible and preferably adjacent to the boiler. It should be identified as to its use. 8. Route a three-core power supply cable that complies with the relevant standards through the grommet and into the product. Power supply cable: Flexible duct 9. Carry out the wiring. ( Page 23) 10. Remove the supplied plug from the bracket in the electronics box and screw the plug onto the power supply cable. 11. Close the electronics box. 12. Make sure that access to the power supply is always available and is not covered or blocked.

7.9.4 Installing the product in a wet room
Danger! Risk of death from electric shock!
If you install the product in a room with high levels of moisture, e.g. a bathroom, observe the nationally recognised technical standards for electrical installations.
Connect the product using a fixed con-
nection and an electrical partition with a contact gap of at least 3 mm (e.g. fuses or power switches).
Use a flexible line for the power supply
cable, which is routed through the grommet into the product.
1. Open the electronics box. ( Page 23) 2. Detach the plug from the PCB slot for the power supply
(X1). 3. Use a suitable, three-core power supply cable that com-
plies with the relevant standards. 4. Carry out the wiring. ( Page 23) 5. Close the electronics box. 6. Observe the flue-gas connection that is required on a
room-sealed air/flue system. ( Page 23)
7.9.5 Connecting controls to the electronics
1. Install the control if necessary. 2. Open the electronics box. ( Page 23) 3. Carry out the wiring. ( Page 23) 4. Observe the wiring diagram in the appendix.
Condition: Connecting a weather-compensated control or a room temperature control via eBUS
Connect the control to the eBUS connection. Bridge the 24 V = RT connection (X100 or X106), if there
is not already a bridge.
Condition: Connecting a low-voltage control (24 V)
Remove the bridge and connect the control to the
24 V = RT connection (X100 or X106).
Condition: Connecting 230 volt controller
Connect the switched live supply of your 230 V RT to the
RT marked X1 position (besides LNPE). Do NOT connect the 230 V to any other terminal e.g. not to X106.
Condition: Connecting a limit thermostat for underfloor heating
Remove the bridge and connect the limit thermostat to
the Burner off connection.
5. Close the electronics box. 6. For multi-circuit controls, change D.018 from Eco (inter-
mittently operating pump) to Comfort (continuously operating pump). ( Page 31)

Installation and maintenance instructions ecoTEC pro 0020244995_05

7.9.6 Connecting additional components via VR 40 ("2 in 7" multi-functional module)
1. Install the components in accordance with the respective instructions.
Condition: Components connected to relay 1
Activate D.027. ( Page 31)
Condition: Components connected to relay 2
Activate D.028. ( Page 31)
7.9.7 Actuating the circulation pump according to requirements
1. Carry out the wiring. 2. Connect the supply line for the external button using
terminals 1 (0) and 6 (functional drawing) on the X41 edge connector, which is supplied with the controller. 3. Plug the edge connector into the PCB slot X41.

0020244995_05 ecoTEC pro Installation and maintenance instructions

8 Operation
8.1 Operating concept The operating concept and the display and setting facilities of the operator level are described in the operating instructions. An overview of the display and setting options in the installer level can be found in the section "Overview of the installer level". ( Page 26) 8.2 Installer level overview
S.31
Code
D.---

8.4 Live Monitor (status codes) Menu Live monitor Status codes in the display provide information on the product's current operating mode. Status codes Overview ( Page 45)
8.5 Setting the hot water temperature
Danger! Risk of death from legionella. Legionella multiply at temperatures below 60 °C.
Ensure that the end user is familiar with
all of the Anti-legionella measures in order to comply with the applicable regulations regarding legionella prevention.
Set the hot water temperature.
Condition: Water hardness: > 3.57 mol/m³
Water temperature: 50

P.--

--/--

8.3 Calling up the installer level
1. Only call up the installer level if you are a competent person.
2. Press and ("i") at the same time.
S.xx appears in the display (current unit status).
3. Press to access the installer level.
Code and -- appear in the display.
4. Set the value 17 (code) and confirm by pressing . 5. Press to access the check programmes (P) and the
fault codes (F) and to return to the diagnostics codes (D). 6. Use or to set the required value and confirm by pressing . 7. Confirm by pressing ( ). 8. Press to cancel a setting or exit the installer level.

Installation and maintenance instructions ecoTEC pro 0020244995_05

9 Start-up
9.1 Carrying out the initial start-up
Initial start-up must be carried out by a customer service technician or an authorised competent person using the Benchmark Checklist. The Benchmark Checklist in the appendix ( Page 50) of the installation instructions must be filled in and stored carefully along with the unit's documentation.
Carry out the start-up procedure using the Benchmark
Checklist in the appendix.
Fill out and sign the Benchmark Checklist.
9.2 Checking and treating the heating water/filling and supplementary water
Caution. Risk of material damage due to poor-quality heating water
Ensure that the heating water is of suffi-
cient quality.
Before filling or topping up the installation, check the
quality of the heating water.
Checking the quality of the heating water
Remove a little water from the heating circuit. Check the appearance of the heating water. If you ascertain that it contains sedimentary materials,
you must desludge the installation.
Use a magnetic rod to check whether it contains mag-
netite (iron oxide).
If you ascertain that it contains magnetite, clean the in-
stallation and apply suitable corrosion-inhibition measures, or fit a magnetic filter.
Check the pH value of the removed water at 25 °C. If the value is below 8.2 or above 10.0, clean the installa-
tion and treat the heating water.
Ensure that oxygen cannot get into the heating water.
Checking the filling and supplementary water
Before filling the installation, measure the hardness of the
filling and supplementary water.
Treating the filling and supplementary water
Observe all applicable national regulations and technical
rules when treating the filling and supplementary water.
Provided the national regulations and technical rules do not stipulate more stringent requirements, the following applies:
You must treat 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 guideline values listed in the following table are not met, or
If the pH value of the heating water is less than 8.2 or more than 10.0.

Total heating output

Water hardness at specific system volume1)

20 l/kW

> 20 l/kW 50 l/kW

> 50 l/kW

ppm mol/ ppm mol/ ppm mol/ CaCO m³ CaCO m³ CaCO m³

< 50

< 300 < 3

200 2

0.02

> 50

200 2

to 200

150 1.5

0.02

> 200

150 1.5

0.02 2

0.02

to 600

> 600

0.02 2

0.02

1) Nominal capacity in litres/heating output; in the case of multiboiler systems, the smallest single heating output is to be used.

Caution. Risk of material damage if the heating water is treated with unsuitable additives.
Unsuitable additives may cause changes in the components, noises in heating mode and possibly subsequent damage.
Do not use any unsuitable antifreeze and
corrosion inhibitors, biocides or sealants.

No incompatibility with our products has been detected to date with proper use of the following additives.
When using additives, follow the manufacturer's instruc-
tions without exception.
We accept no liability for the compatibility of any additive or its effectiveness in the rest of the heating system.
Additives for cleaning measures (subsequent flushing required) Adey MC3+ Adey MC5 Fernox F3 Sentinel X 300 Sentinel X 400
Additives intended to remain permanently in the installation Adey MC1+ Fernox F1 Fernox F2 Sentinel X 100 Sentinel X 200
Additives for frost protection intended to remain permanently in the installation Adey MC ZERO Fernox Antifreeze Alphi 11 Sentinel X 500
If you have used the above-mentioned additives, inform
the end user about the measures that are required.
Inform the end user about the measures required for frost
protection.

0020244995_05 ecoTEC pro Installation and maintenance instructions

9.3 Filling the condensate trap

9.7 Flushing the heating installation for the first time ("cold")
Note The complete heating system must be flushed at least twice: Once with cold water and once with hot water in accordance with the following instructions.

1
1. Remove the lower section from the condensate trap (1). 2. Fill the lower section with water up to 10 mm below the
upper edge. 3. Attach the lower section to the condensate trap. 9.4 Switching the product on and off
Press the on/off button on the product. The display shows the basic display.

1. Check whether all thermostatic radiator valves and both service valves on the product are open.
2. Connect a hose to the drain valve that is located at the lowest position in the heating system.
3. Open the radiator valves and the drain valves so that the water can drain quickly. Start at the next point in the installation and open the purging valves on the radiators so that the contaminated water can completely drain.
4. Close the draining cocks. 5. Refill the heating system with water. 6. Check that the expansion relief valve of the heating
system is functioning correctly by turning the handle on the valve. 7. Check the pressure in the heating system and top up with water if necessary. 8. Close the filling valve and the cold water tap.
9.8 Filling the heating installation
1

9.5 Using check programmes
Call up the installer level + 1x By activating various check programmes, you can trigger special functions on the product. Check programmes Overview ( Page 48)

9.6 Preventing low water pressure
To ensure that the heating installation operates smoothly, the indicator on the pressure gauge must point to the upper half of the grey area or to the middle of the bar graph display in the display (marked by the dashed limit values) 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).
If the heating installation extends over several storeys, higher filling pressures may be required to avoid air entering the heating installation.
If the filling pressure falls below 0.08 MPa (0.8 bar), the product indicates low pressure by displaying a flashing pressure value. If the filling pressure falls below 0.05 MPa (0.5 bar), the product switches off. The display shows F.22.
Top up the heating water to start the product up again.
The pressure value flashes in the display until a pressure of 0.11 MPa (1.1 bar) or higher has been reached.

1. Flush the heating installation through.
2. Undo the cap of the automatic air vent (1) by one to two rotations and leave it open, as the product purges itself via the automatic air vent even in continuous mode.
3. Select the check programme P.06.
The diverter valve moves to the mid-position, the
pumps do not run and the product does not switch to heating mode.
4. Observe the information on treating heating water. ( Page 27)
5. Connect the filling and drainage tap in the heating installation to a heating water supply, if possible with the cold water valve, in accordance with the relevant standards.
6. Open the heating water supply.
7. Open all radiator valves (thermostatic radiator valves) of the heating installation.
8. If necessary, check that both service valves on the product are open.
9. Slowly open the filling and drainage tap so that the water flows into the heating system.
10. Purge the lowest radiator until water flows out of the purging valve without bubbles.
11. Purge all other radiators until the entire heating system has been filled with water.

Installation and maintenance instructions ecoTEC pro 0020244995_05

12. Close all purging valves. 13. Monitor the rising filling pressure in the heating installa-
tion. 14. Fill with water until the required filling pressure is
reached. 15. Close the filling and drainage tap and the cold water
valve. 16. Check all connections and the entire system for leaks.
9.9 Purging the heating installation
1. Select the check programme P.00.
The product does not start up, the internal pump
operates intermittently and purges either the heating circuit or the hot water circuit.
The display shows the filling pressure of the heating
installation. 2. Make sure that the filling pressure of the heating install-
ation does not fall below the minimum filling pressure. 0.08 MPa ( 0.80 bar)
At the end of the filling procedure, the filling pres-
sure of the heating installation should be at least 0.02 MPa (0.2 bar) above the counter-pressure of the expansion vessel ("Exp") (PInstallation PExp + 0.02 MPa (0.2 bar)). 3. If there is still too much air in the heating installation at the end of the check programme P.00, repeat the check programme.
9.10 Filling and purging the hot water system
1. Open the cold water stop valve on the product. 2. Fill the hot water system by opening all the hot water
draw-off valves until water escapes.
9.11 Gas inspection
9.11.1 Checking the factory-set gas setting
Caution. Risk of material damage caused by making unauthorised settings.
Never modify the factory setting of the gas
pressure regulator of the gas valve.

9.11.2 Checking the air/flue pipe/flue gas recirculation
1. Check the flue gas installation is intact in accordance with the latest gas safe technical bulletin and information supplied in the installation instructions.
2. For extended flue gas installations check for flue gas recirculation using the air analysis point.
3. Use a flue gas analyser. 4. If you discover unusual levels of CO or CO 2 in the sup-
ply air, search for the leak in the flue system or for signs of flue gas recirculation. 5. Eliminate the damage properly. 6. Check again whether the supply air contains any unusual levels of CO or CO 2. 7. If you cannot eliminate the damage, do not start up the product.

9.11.3 Checking the gas flow rate

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 up the product with the check programme P.01. In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermostat.
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. Compare the measured values with the corresponding
values in the table.

H gas in m³/h

P gas in kg/h

Qn, DHW

nom. Heatoutput DHW

Nom. +5%

-10%

Nom. +5%

-10%

18.9 18.5 2.00 2.10 1.80 1.47 1.54 1.32

23.5 23.0 2.49 2.61 2.24 1.83 1.92 1.64 24.5 24.0 2.59 2.72 2.33 1.90 2.00 1.71

27.8 27.2 2.94 3.09 2.65 2.16 2.27 1.94

Before you start up the product, compare the gas group
information on the data plate with the gas group available at the installation site.
Condition: The product design is not compatible with the local gas group
Only Vaillant Service may perform a gas conversion.
If a gas conversion to liquefied petroleum gas has been carried out, the smallest possible partial load is higher than is shown on the display. The correct values can be found in the Technical data in the appendix.
Call Vaillant Service (0330 1003 143). Do not start up the product.

Condition: Gas flow rate not in the permissible range
Check all of the piping and ensure that the gas flow rates
are correct.
Only put the product into operation once the gas flow
rates have been corrected.
Condition: Gas flow rate in the permissible range
End the check programme P.01. Allow the boiler to cool down by allowing pump overrun to
operate for a minimum of 2 minutes.
Record the boiler maximum gas flow rate onto the
Benchmark gas boiler commissioning checklist.

Condition: The product design is compatible with the local gas group
Proceed as described below.

0020244995_05 ecoTEC pro Installation and maintenance instructions

9.11.4 Checking the gas flow pressure 1. Ensure that the gas inlet working pressure can be
obtained with all other gas appliances in the property working. 2. Close the gas stopcock.
1

Do not make any adjustments to the
product.
Do not start up the product.
If you cannot correct the failure, notify the gas supply
company and proceed as follows:
End the check programme P.01. Allow the boiler to cool down by allowing pump overrun to
operate for a minimum of two minutes.
Close the gas stopcock. Remove the pressure gauge and retighten the sealing
screw (1) for the measuring nipple.
Open the gas stopcock. Check the test nipple for gas tightness. Close the gas stopcock. Install the front casing. Disconnect the product from the power grid. You must not start up the boiler.

2
3. Use a screwdriver to undo the test nipple screw (1) (lower screw) at the gas valve assembly.
4. Connect a manometer (2) to the test nipple (1). 5. Open the gas stopcock. 6. Start up the product with the check programme P.01. 7. In addition, ensure that maximum heat can be dissip-
ated into the heating system by turning up the room thermostat. 8. With the boiler operating at full load check that the gas inlet working pressure at the reference test point complies with the requirements. Permissible gas flow pressure for operation with
natural gas H: 1.3 to 2.3 kPa (13.0 to 23.0 mbar) Permissible gas flow pressure for operation with
liquefied petroleum gas P: 2.3 to 4.3 kPa (23.0 to 43.0 mbar) 9. Should the pressure recorded at the reference test point in the boiler be lower than indicated check if there is any blockage in the pipework or if the pipework is undersized.
Condition: Gas flow pressure not in the permissible range
Caution. Risk of material damage and operating faults caused by incorrect gas connection pressure. If the gas connection pressure lies outside the permissible range, this can cause operating faults in and damage to the product.

Condition: Gas flow pressure in the permissible range
End the check programme P.01. Allow the boiler to cool down allowing pump overrun to
operate for a minimum of two minutes.
Close the gas stopcock. Remove the pressure gauge and retighten the sealing
screw (1) for the measuring nipple.
Open the gas stopcock. Check the test nipple for gas tightness. Install the front casing. Reset boiler controls for normal operation. Record the appliance gas inlet working pressure (kPa
resp. mbar) in the Benchmark gas boiler commissioning checklist.

9.11.5 Checking the CO content and, if necessary, adjusting it (air index setting)

1. Start up the product with the check programme P.01.
2. Wait at least five minutes until the product reaches its operating temperature.
3. Measure the CO and CO/CO content at the flue gas analysis point.
4. Compare the measured value with the corresponding value in the table.

Set values

Unit Natural gas H

CO after 5 minutes in full load mode with front casing closed
CO after 5 minutes in full load mode with front casing removed
Set for Wobbe index W
O after 5 minutes in full load mode with front casing closed
CO value with full load
CO/CO

Vol% Vol% kWh/m³ Vol% ppm

9.2 ± 1.0
9.0 ± 1.0 14.09
4.5 ± 1.8 250
0.0031

Liquefied petroleum
gas P 10.4 ± 0.5
10.2 ± 0.5
21.34
5.1 ± 0.8 250
0.0026

Installation and maintenance instructions ecoTEC pro 0020244995_05

Condition: The CO content must be adjusted

Note
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 system is to be treated with an inhibitor it should be applied at this stage in accordance with the manufacturer's instructions.
1 8. Install the front casing.

9.13 Checking leak-tightness
Check the gas pipe, the heating circuit and the hot water
circuit for leak-tightness.
Check that the air/flue pipe has been installed correctly.

2
Remove the yellow sticker. Remove the covering cap (1). Set the CO content (value with front casing removed) by
turning the screw (2).
Higher CO content: Turn anti-clockwise
Lower CO content: Turn clockwise
For natural gas only: Only perform the adjustment
in small increments of a 1/8 turn and wait approx. one minute after each adjustment until the value stabilises.
For liquid gas only: Only perform the adjustment in ex-
tremely small increments (approx. 1/16 turn), and wait approx. one minute after each adjustment until the value stabilises.
After you have implemented the settings, press ( ). If an adjustment is not possible in the specified adjust-
ment range, you must not start up the product.
If this is the case, inform Customer Service. Refit the covering cap. Install the front casing.
9.12 Thoroughly flushing the heating installation ("hot")
1. Operate the appliance until the boiler and the heating system are up to temperature.
2. Check the heating system for leaks.
3. Connect a hose to the drain valve located at the lowest position of the heating system.
4. 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.
5. Close the drain valve.
6. Fill the heating system again with water as described in Filling the heating installation ( Page 28) and Purging the heating installation ( Page 29).
7. Re-fill the system until the system design pressure of 0,1 MPa (1,0 bar) is attained.

Condition: Room-sealed operation
Check whether the vacuum chamber has been closed
tightly.
9.13.1 Checking the heating mode
1. Make sure that there is a heat requirement. 2. Call up Live monitor.
If the product is working correctly, the display shows
S.04.
9.13.2 Checking the hot water generation
1. Open a hot water valve all the way. 2. Call up Live monitor.
If the hot water generation is working correctly, S.14
appears in the display.
10 Adapting the unit to the heating installation
10.1 Calling up diagnostics codes
You can find the setting options in the diagnostics codes in the installer level. Overview of diagnostics codes ( Page 41)
Call up the installer level. ( Page 26)
10.2 Burner anti-cycling time
To prevent frequent switching on and off of the burner and thus prevent energy losses, an electronic restart lockout is activated for a specific period each time the burner is switched off. The burner anti-cycling time is only active for the heating mode. Hot water handling during a burner anti-cycling time does not affect the time function element (default setting: 20 mins).

0020244995_05 ecoTEC pro Installation and maintenance instructions

10.2.1 Setting the burner anti-cycling time

1. Navigate to diagnostics code D.002 in the installer level and confirm by pressing .
2. Set the burner anti-cycling time and confirm by pressing .

TFlow (target) [°C] 30 35 40 45 50 55 60 65 70 75

Set maximum burner anti-cycling time [min]

5 10 15 20 25 30

2.0 4.0 8.5 12.5 16.5 20.5 25.0 2.0 4.0 7.5 11.0 15.0 18.5 22.0 2.0 3.5 6.5 10.0 13.0 16.5 19.5 2.0 3.0 6.0 8.5 11.5 14.0 17.0 2.0 3.0 5.0 7.5 9.5 12.0 14.0 2.0 2.5 4.5 6.0 8.0 10.0 11.5 2.0 2.0 3.5 5.0 6.0 7.5 9.0 2.0 1.5 2.5 3.5 4.5 5.5 6.5 2.0 1.5 2.0 2.5 2.5 3.0 3.5 2.0 1.0 1.0 1.0 1.0 1.0 1.0

TFlow (target) [°C]
30 35 40 45 50 55 60 65 70 75

Set maximum burner anti-cycling time [min]
35 40 45 50 55 60 29.0 33.0 37.0 41.0 45.0 49.5 25.5 29.5 33.0 36.5 40.5 44.0 22.5 26.0 29.0 32.0 35.5 38.5 19.5 22.5 25.0 27.5 30.5 33.0 16.5 18.5 21.0 23.5 25.5 28.0 13.5 15.0 17.0 19.0 20.5 22.5 10.5 11.5 13.0 14.5 15.5 17.0
7.0 8.0 9.0 10.0 11.0 11.5 4.0 4.5 5.0 5.5 6.0 6.5 1.0 1.0 1.0 1.0 1.0 1.0

Heat demand

Number of persons

20.0 kW 25.0 kW > 27.0 kW

34 45 34 46 34 46

Guideline value for burner operating hours until the next inspection/maintenance work is due for an average operating time of one year (dependent upon the system type)
2600 h
2700 h
2800 h
2900 h
3000 h
3000 h

10.4 Setting the pump output
1. Navigate to diagnostics code D.014 in the installer level and confirm by pressing .
2. Set the required pump output.
Condition: Low loss header installed
Switch off the speed regulation and set the pump output
to a fixed value.

10.4.1 Remaining pump head 10.4.1.1 Pump curve for VUW 246, VUW 286

Remaining feed head [hPa]

400 350 300 250 200 150 100
50 0 0

100% PWM 80% 70% 60% 53%
200 400 600 800 1000 1200 1400 Flow rate [l/hr]

10.2.2 Resetting the remaining burner anti-cycling time
Press .

10.3 Setting the maintenance interval

1. Navigate to diagnostics code D.084 in the installer level and confirm by pressing .
2. Set the maintenance interval (operating hours) until the next maintenance work is due and confirm by pressing .

Heat demand
5.0 kW 10.0 kW 15.0 kW

Number of persons
12 23 12 23 23 34

Guideline value for burner operating hours until the next inspection/maintenance work is due for an average operating time of one year (dependent upon the system type)
1050 h
1150 h
1500 h
1600 h
1800 h
1900 h

10.5 Setting the bypass valve
Caution. Risk of material damage caused by incorrect setting of the high-efficiency pump If the pressure at the bypass valve is increased (by turning it clockwise) and the pump output is set to less than 100%, the product may not operate correctly.
In this case, set the pump output to
5 = 100% using diagnostics code D.014.
Remove the front casing. ( Page 18)

Installation and maintenance instructions ecoTEC pro 0020244995_05

Inform the end user that they must not store or use explo-

sive or highly flammable substances (such as petrol, pa-

per or paint) in the installation room of the product.

Complete and sign off the Benchmark commissioning

check list.

Complete and sign off the guarantee documentation.

Regulate the pressure using the adjusting screw (1).

Position of the adjusting screw

Pressure in MPa (mbar)

Notes/application

Right-hand stop (turned all the way down)

0.035 (350)

If the radiators do not heat up sufficiently at the default setting. In this case, you must set the pump to the maximum speed.

Mid-position (5 turns to the left)

0.025 (250)

Default setting

5 further turns to the left from the mid-position

0.017 (170)

Install the front casing.

If noises are produced in the radiators or radiator valves

11 Handing over to the end user
At the time of commissioning complete all relevant sec-
tions of the Benchmark commissioning checklist, located at the rear of this document.
For IE: Complete a "Declaration of Conformity" to indicate
compliance to I.S. 813. An example of this is given in the current edition of I.S. 813.
When you have finished the installation, affix the en-
closed sticker (which requests that the user reads the instructions) to the front of the product in the end user's language.
Draw attention, to the current issue of the Gas Safety
(Installation and Use) Regulations, Section 35, which imposes a duty of care on all persons who let out any property containing a gas appliance in the UK.
Explain to the end user how the safety devices work and
where they are located.
Inform the end user how to handle the product. In particular, draw attention to the safety warnings that
the end user must follow.
Inform the end user that they must have the product
maintained in accordance with the specified intervals.
Pass all of the instructions and documentation for the
product to the end user for safe-keeping.
Inform the end user about measures taken to ensure
the supply of combustion air and flue gas guiding, and instruct the operator that he must not make any changes.

0020244995_05 ecoTEC pro Installation and maintenance instructions

12 Inspection and maintenance
12.1 Complete Service Interval Record section
After servicing, complete the relevant Service Interval
Record section of the Benchmark Checklist located on the inside back pages of this document.
12.2 Using original seals If you replace components, use only the enclosed original seals; additional sealing materials are not required.

12.5 Removing the compact thermal module
Note The compact thermal module consists of four main components: Speed-regulated fan, Gas/air connection, Gas supply (mixture pipe) with burner flange, Premix burner.

12.3 Inspection and maintenance

Danger!

You must carry out an annual inspection of the product.
The annual inspection can be effectively performed

Risk of death and risk of material damage caused by hot flue gas.

without removing components by requesting data from the DIA system, carrying out the simple visual checks indicated in the table in the appendix and performing a flue gas measurement. The maintenance intervals and their scope are determined by the heating engineer based on

The seal, insulating mat and self-locking nuts on the burner flange must not be damaged. Otherwise, hot flue gases may escape and cause personal injury and material damage.

the condition of the boiler found during the inspection. All inspection and maintenance work should be performed in the order specified in the table in the appendix.
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 relevant installation instructions.
The integrity of the flue gas installation and flue seals is in accordance with the relevant flue installation instruc-

Replace the seal each time you open the
burner flange.
Replace the self-locking nuts on the
burner flange each time you open the burner flange.
If the insulating mat on the burner flange
or on the back wall of the heat exchanger shows signs of damage, replace the insulating mat.

tions enclosed.

Visual, the integrity of the boiler combustion circuit and

1. Switch off the product using the on/off button.

relevant seals (paying particular attention to the burner 2. Close the gas stopcock.

door seal).

3. Remove the front casing. ( Page 18)

The gas inlet working pressure at maximum rate.

4. Hinge the electronics box forward.

The gas flow rates.

Correctness of electrical, water and gas connections.

Correctness of the water pressure. 2
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.

12.4 Preparing the maintenance work
1. Switch off the product. 2. Disconnect the product from the power grid. 3. Remove the front casing. ( Page 18) 4. Close the gas stopcock. 5. Close the service valves in the heating flow and in the
heating return. 6. Close the service valve in the cold water pipe. 7. Drain the product to clean hydraulic components
( Page 36). 8. Ensure that water does not drip on live components
(e.g. the electronics box). 9. Use only new seals and o'ring. Do not use additional
compounds.

4
5. Unscrew the retaining screw (2) and remove the air intake pipe (1) from the intake stub.
6. Unscrew either the union nut on the gas valve assembly (3) or the union nut (4) between the gas pipes.

Installation and maintenance instructions ecoTEC pro 0020244995_05

12.7 Checking the burner
1

3 6 5

7. Remove the ignition line plug (5) and the earth wire plug (6) from the ignition electrode.
8. Remove the plug (3) from the fan motor. 9. Remove the plug (4) from the gas valve assembly. 10. Unscrew the four nuts (7). 11. Remove the entire compact thermal module (2) from
the heat exchanger (1). 12. Check the burner and the heat exchanger for damage
and dirt. 13. If necessary, clean or replace the components accord-
ing to the following sections. 14. Fit a new burner flange seal. 15. Check the insulating mat on the burner flange and on
the back panel of the heat exchanger. If you notice any signs of damage, replace the relevant insulating mat.

1. Check the surface of the burner (1) for damage. If you see any damage, replace the burner.
2. Fit a new burner flange seal (3). 3. Check the insulating mat (2) on the burner flange. If you
notice any signs of damage, replace the insulating mat.
12.8 Cleaning the condensate trap
1. Remove the lower section from the condensate trap (1). 2. Flush out the lower section with water. 3. Fill the lower section with water up to about 10 mm be-
low the upper edge. 4. Attach the lower section to the condensate trap.
12.9 Cleaning the filter in the cold water inlet
Validity: Product with integrated hot water generation

12.6 Cleaning the heat exchanger

1. Protect the folded down electronics box against sprayed water.

2 3

1 2

2. Never undo the four nuts on the stud bolt (1) or tighten

them.

3. Clean the heating coil (3) of the heat exchanger (4) using water or, if required, vinegar (to a maximum of 5% 1. Close the cold water stop valve. acid). Allow the vinegar to act on the heat exchanger for 2. Drain the product on the hot water side.

20 minutes.

3. Unscrew the cap nut (2) and the lock nut (1) from the

4. Rinse away any loose dirt with a sharp jet of water or

product's casing.

use a plastic brush. Do not point the water jet directly

at the insulating mat (2) on the back of the heat ex-

changer.
The water flows out of the heat exchanger through

the condensate siphon.

0020244995_05 ecoTEC pro Installation and maintenance instructions

12.11 Draining the product
1. Close the service valves of the product. 2. Start the check programme P.06 (diverter valve mid-
position). 3. Open the drain valves. 4. Make sure that the cap of the automatic air vent on
the internal pump is open so that the product can be drained fully.

4. Tilt the electronics box forward. 5. Remove the clamp (2). 6. Remove the pipe (1) from the product. 7. Rinse the filter under a jet of water, holding it against
the direction of flow. 8. If the filter is damaged or it can no longer be cleaned
sufficiently, you must replace the filter. 9. Refit the pipe. 10. Reinsert the clamp. 11. Always use new seals and retighten the cap nuts and
the lock nut. 12. Open the cold water stop valve.

12.10 Installing the compact thermal module

12.12 Checking the pre-charge pressure for the internal expansion vessel
1. Close the service valves and drain the product. 2. Measure the pre-charge pressure of the expansion ves-
sel at the vessel valve.
Condition: Pre-charge pressure < 0.075 MPa (0.75 bar)
Ideally, you should top up the expansion vessel with ni-
trogen. Otherwise, top it up with air. Ensure that the drain valve is open when topping up.
3. If water escapes from the valve of the expansion vessel, you must replace the expansion vessel. ( Page 39)
4. Fill the heating installation. ( Page 28) 5. Purge the heating installation. ( Page 29)
12.13 Checking the filling pressure of the heating installation
1. Check the filling pressure of the heating installation, top it up with heating water, if necessary, and purge it.
2. Fill the heating installation. ( Page 28) 3. Purge the heating installation. ( Page 29)

12.14 Checking the quality of the heating water

3 Check the quality of the heating water: Clarity (clouding),

correct inhibitor and pH value. ( Page 27)

5
4
1. Connect the compact thermal module (2) to the heat exchanger (1).
2. Tighten the four nuts (7) in a cross-wise pattern until the burner flange fits closely and uniformly onto the mating surfaces. Tightening torque: 6 Nm, if a torque spanner is available
3. Connect the plugs (3) to (6) again. 4. Connect the gas pipe using a new seal. In the process,
secure the gas pipe against twisting. 5. Open the gas stopcock. 6. Make sure that there are no leaks. 7. Check that the sealing ring in the air intake pipe is posi-
tioned correctly in the seal seat. 8. Reconnect the air intake pipe to the intake stub. 9. Secure the air intake pipe with the retaining screw. 10. Check the gas flow pressure.

12.15 Completing inspection and maintenance
work
Start a test operation after the maintenance. Check the heating mode and, if required, the domestic
hot water generation (if available).
Check the gas flow pressure. ( Page 30) Check the CO content and, if necessary, adjust it (air
index setting). ( Page 30)
If required, reset the maintenance interval. ( Page 32) Install the front casing. Fill out the relevant Service Record section in the Bench-
mark Checklist.

Installation and maintenance instructions ecoTEC pro 0020244995_05

12.16 Checking the product for leak-tightness
Check that the product is leak-tight. ( Page 31)
13 Troubleshooting
13.1 Checking service messages appears if you have set a maintenance interval, for ex-
ample, and this has passed or a service message is issued. The product is not in fault mode.
Call up the Live Monitor. ( Page 26)
Condition: S.46 is displayed
The product is in Comfort protection mode. The product continues to run with restricted comfort after it has detected a fault.
To establish whether or not a component is defective,
read the fault memory. ( Page 37)

13.4 Resetting parameters to factory settings
1. Navigate to diagnostics code D.096 in the installer level. 2. Set the diagnostics code to 1, and confirm by pressing
.
13.5 Preparing the repair work
1. Decommission the product. 2. Disconnect the product from the power mains. 3. Remove the front casing. ( Page 18) 4. Close the gas isolator cock. 5. Close the service valves in the heating flow and in the
heating return. 6. Close the service valve in the cold water pipe. 7. Drain the product if you want to replace water-bearing
components of the product. 8. Make sure that water does not drip on live components
(e.g. the electronics box). 9. Use only new seals.

Note If no fault message is present, the product will automatically switch back to normal operating mode after a certain time.
13.2 Eliminating faults
If fault messages are displayed (F.XX), eliminate the fault
after checking the table in the appendix. Check programmes Overview ( Page 48) Overview of fault codes ( Page 46)
If several faults occur at the same time, the display shows the corresponding fault messages for two seconds each in alternation.
Press (max. three times) to restart the product. If you are unable to eliminate the fault and the fault re-
curs despite reset attempts, contact customer service.

13.5.1 Procuring spare parts
The original components of the product were also certified by the manufacturer as part of the declaration of conformity. If you use other, non-certified or unauthorised parts during maintenance or repair work, this may void the conformity of the product and it will therefore no longer comply with the applicable standards.
We strongly recommend that you use original spare parts from the manufacturer as this guarantees fault-free and safe operation of the product. To receive information about the available original spare parts, contact the contact address provided on the back page of these instructions.
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the product.
13.6 Replacing defective components
13.6.1 Replacing the burner

13.3 Calling up and clearing the fault memory

1. Remove the compact thermal module. ( Page 34)

The last 10 fault messages are stored in the fault memory.

Call up the installer level. ( Page 26)

Navigate to the fault codes.

The number of faults that have occurred is shown in

the display and the faults that are currently called up

are displayed with their fault numbers F.xx.

Press or to call up individual fault messages.

To delete the entire fault list, navigate to diagnostics code

D.094 in the installer level.

Set the diagnostics code to 1, and confirm by pressing

2
2. Undo the four screws (1) on the burner. 3. Remove the burner. 4. Install a new seal (2) on the new burner. 5. Install the compact thermal module. ( Page 36)

0020244995_05 ecoTEC pro Installation and maintenance instructions

13.6.2 Replacing the fan or gas valve

15. Tighten the cap nut (2) on the gas valve and the cap

nut (8) between the gas pipes. In the process, secure

the gas pipe against twisting. Use new seals.

2 16. After you have completed this work, carry out a leaktightness test (function check). ( Page 31)

3 17. If you have installed a new gas valve, adjust the gas

ratio setting. ( Page 29)

4 13.6.3 Replacing the heat exchanger

5 1. Drain the product. ( Page 36)

2. Remove the compact thermal module. ( Page 34) 6
3. Detach the condensate drain hose from the heat ex-

changer.

8 1

2 3

1. Remove the air intake pipe.
2. Remove the plug from the gas valve (7). 3. Remove the plug from the fan motor (6) by pushing in
the latching lug. 4. Unscrew either the cap nut (2) on the gas valve or the
cap nut (8) between the gas pipes. Secure the gas pipe against twisting. 5. Unscrew the three screws (2)-(4) between the mixture pipe (1) and the fan flange.

4. Remove the clamps (2) and (3) from the flow connection and the return connection.
5. Detach the flow connection. 6. Detach the return connection. 7. Remove two screws (1) on each of the two retainers.

2 1

6. Remove the entire fan/gas valve unit from the product.
7. If you want to replace the gas valve, unscrew the cap nut (2) if the gas pipe is still secured to the gas valve.
8. Unscrew both fixing screws (1) on the gas valve and remove the fan from the gas valve.
9. Replace the defective fan or the defective gas valve.
10. Install the gas valve and the fan in the same position as before. Use new seals.
11. Screw the fan to the gas valve.
12. If you had removed the gas pipe, screw the cap nut of the gas pipe (2) only loosely to the gas valve. Only tighten the cap nut on the gas valve after the installation work has been completed.
13. Refit the entire fan/gas valve unit in reverse order. You must use a new seal (5) for this.
14. Ensure that the order in which the three screws are screwed in between the fan and the mixture pipe corresponds to the numbering (3), (2) and (4).

8. Remove the lower three screws (2) on the rear section of the retainer.
9. Swing the retainer to the side around the top screw (1). 10. Pull the heat exchanger downwards and to the right,
and remove it from the product. 11. Install the new heat exchanger in reverse order. 12. Replace the seals.

Installation and maintenance instructions ecoTEC pro 0020244995_05

Note Instead of grease, use only water or commercially available soft soap to aid installation.
13. Insert the flow and return connections into the heat exchanger as far as they will go.
14. Make sure that the brackets are seated correctly on the flow and return connections.
15. Install the compact thermal module. ( Page 36) 16. Fill and purge the product and, if necessary, the heating
installation. ( Page 28)
13.6.4 Replacing the expansion vessel 1. Drain the product. ( Page 36)
1
2
3 4

5. Set the correct value for the relevant product type in accordance with the table below and confirm by pressing . Product type number VUW 246/5-3 (H-GB) ecoTEC pro 7 24 VUW 286/5-3 (H-GB) ecoTEC pro 22 28 VUW 286/5-3 (P-GB) ecoTEC pro 22 28
The electronics are now set to the product type and
the parameters of all diagnostics codes are set to default settings. 6. Make the system-specific settings.
13.7 Completing repair work
1. Establish the power supply. 2. Switch the product back on if this has not yet been
done. ( Page 28) 3. Install the front casing. 4. Open all service valves and the gas stopcock.
13.8 Checking the product for leak-tightness
Check that the product is leak-tight. ( Page 31)
14 Decommissioning

2. Undo the screwed connection (4). 3. Remove both screws (1) on the support plate (2). 4. Remove the support plate (2). 5. Pull out the expansion vessel (3) towards the front. 6. Insert the new expansion vessel into the product. 7. Screw the new expansion vessel to the water connec-
tion. Use a new seal for this. 8. Attach the support plate using both screws (1). 9. Fill and purge the product and, if necessary, the heating
installation. ( Page 28)
13.6.5 Replacing the PCB or the display
Note If you only replace one component, when the product is switched on, the new component adopts the parameters that were previously set from the component that was not replaced.
1. Open the electronics box. ( Page 23) 2. Replace the PCB or display according to the assembly
and installation instructions supplied. 3. Close the electronics box.
13.6.6 Replacing the PCB and the display
1. Open the electronics box. ( Page 23) 2. Replace the PCB and display according to the
assembly and installation instructions supplied. 3. Close the electronics box. 4. Press the on/off button on the product. ( Page 28)
You are automatically taken to D.093 to set the
device specific number.

14.1 Temporarily decommissioning the product
Press the on/off button. The display goes out.
Close the gas stopcock. On combination products and products with a connec-
ted domestic hot water cylinder, you must also close the cold-water isolation valve.
14.2 Permanently decommissioning the product
Press the on/off button. The display goes out.
Disconnect the product from the power grid. Close the gas stopcock. Close the cold-water isolation valve. Drain the product. ( Page 36)
15 Recycling and disposal
Disposing of the packaging
Dispose of the packaging correctly. Observe all relevant regulations. For detailed information refer to www.vaillant.co.uk.

0020244995_05 ecoTEC pro Installation and maintenance instructions

Appendix A Inspection and maintenance work

The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If national regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of the intervals listed. Each time inspection and maintenance work is carried out, carry out the required preparatory and completion work.

Maintenance work

Interval

Record all of the analysis results in the Benchmark Checklist in these

Annually

instructions

Ask the end user whether any significant problems occur when operating Annually

the product

Use the diagnostics system to check the product's fault history

Annually

Visually inspect whether the air/flue pipe and its opening have been in- Annually

stalled correctly in accordance with the set-up instructions

Check that the unit has been installed correctly and the connections have Annually

been secured

Check that the condensate pipe is in good condition, that it is leak-tight Annually

and that the drain is correct

Check whether all of the externally routed condensate pipes are dimen- Annually

sioned correctly and have been insulated sufficiently (frost protection)

Check whether the gas flow rate corresponds with the specifications on Annually

the data plate and lies within the tolerances specified in these instructions

If the gas flow rate lies outside of the tolerances specified in these in-

Annually

structions, eliminate the fault in accordance with the regulations and the

current technology

Check the general condition of the product and, if required, eliminate any Annually

faults that are found

Carry out the combustion analysis: Measure the CO content, CO content Annually

and the CO/CO ratio. For products with a rear air/flue connection: The

combustion analysis can only be carried out when the unit casing has

been removed; it is not necessary to test these products for flue gas recir-

culation

Check the product's recirculation at the supply air test point on the air/flue Annually

pipe. If required, inspect the entire air/flue system and, if necessary, cor-

rect the fault

Disconnect the product from the electrical installation

Annually

Check and, if required, correct the electrical installation

Annually

Removing dirt from the product and the vacuum chamber

Annually

Visually check the heat cell to ascertain its condition and detect any cor- Annually

rosion, rust or damage, and carry out maintenance work, if required

Check that the gas stopcock and service valves function correctly

Annually

Check the quality of the heating water: Clarity (clouding), correct inhibitor Annually

and pH value

Removing the compact thermal module

at regular intervals

Check the burner for damage

at regular intervals

Checking the insulating mats in the combustion area and replacing dam- at regular intervals

aged insulating mats

Cleaning the heat exchanger

at regular intervals

Cleaning the condensate trap

Annually

Filling the condensate trap

Annually

Installing the compact thermal module

at regular intervals

Checking the pre-charge pressure for the internal expansion vessel

at regular intervals

Cleaning the filter in the cold water inlet

at regular intervals

Check the impeller sensor for dirt/damage

at regular intervals

If the water volume is insufficient (domestic hot water) or the outlet tem- at regular intervals

perature is insufficient, check the secondary heat exchanger

Reassemble the product

After each time maintenance work is carried out

Opening the service valves

Annually

Installation and maintenance instructions ecoTEC pro 0020244995_05

Maintenance work

Interval

Filling the heating installation

at regular intervals

Completing inspection and maintenance work

Annually

Visually check the ignition and burner behaviour

Annually

Check the CO content, CO content and the CO/CO ratio again

Annually

Checking leak-tightness

Each time maintenance work is

carried out

B Overview of diagnostics codes

Note Since the code table is used for various products, some codes may not be visible for the product in question.

Code Parameter D.000 Heating partial load
D.001 Pump overrun: Heating D.002 Max. anti-cycl. time: Heating D.003 Outlet temperature actual value

Values or explanations
Adjustable partial heat load in kW Auto: Product automatically adjusts max. partial load to current system demand 1 to 60 min 2 to 60 min In °C

Factory setting Auto
5 min 20 min

D.004 Cylinder temperature actual value In °C

D.005 Heating target flow temperature D.006 Outlet temperature target value

In °C; the maximum value that is set in D.071 and is restricted by means of an eBUS control if such a control is connected
35 to 65

D.007 Comfort mode target value APC target value Cylinder temperature target value
D.008 Controller 3-4 D.009 eBUS controller target value

Product with integrated domestic hot water generation, and product with integrated domestic hot water generation and shift-load cylinder 35 to 65 Product with heating mode only Frost protection is at 15 °C, then 40 to 70 °C (max. temperature can be adjusted under D.020)
Room thermostat open (no heat requirement) Room thermostat closed (heat requirement)
In °C

D.010 Internal pump

On, Off

D.011 External pump

On, Off

D.012 Cyl. charging pump

On, Off

D.013 Circulation pump

On, Off

D.014 Pump speed target value D.015 Pump speed actual value

Target value of internal high-efficiency pump in %. Possible settings: 0 = Auto 1 = 53 2 = 60 3 = 70 4 = 85 5 = 100
Actual value for internal high-efficiency pump in %

0 = Auto

D.016 Controller 24 V DC: Heating mode Heating mode off/on

Own setting
Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable
Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable
Not adjustable Not adjustable

0020244995_05 ecoTEC pro Installation and maintenance instructions

Code Parameter D.017 Control type
D.018 Pump operating mode
D.019 Pump operating mode: 2-stage pump
D.020 Max. DHW temperature target value
D.022 DHW demand D.023 Heating mode status D.025 Ext. eBUS signal: Cylinder char-
ging D.026 Auxiliary relay
D.027 Accessory relay 1

Values or explanations
Control type: 0 = Flow, 1 = Return Return: Automatic detection function for heat output inactive. Max. possible partial heat load when D.000 is on Auto.
1 = Comfort (continuously operating pump) Internal pump is switched on when the heating flow temperature is not at Heating off and the heat requirement is enabled via an external control 3 = Eco (intermittently operating pump) Internal pump is switched on every 25 minutes for 5 minutes once the overrun time has elapsed
Setting for two-stage pump operating mode 0: Burner mode stage 2, pump prerun/overrun stage 1 1: Heating mode and pump prerun/overrun stage 1, domestic hot water mode stage 2 2: Automatic heating mode, pump prerun/overrun stage 1, domestic hot water mode stage 2 3: Always stage 2 4: Automatic heating mode, pump prerun/overrun stage 1, domestic hot water mode stage 1
Adjustment range: 5070 °C (actoSTOR 65 °C)

Factory setting 0 = Flow 3 = Eco
2
65 °C

Own setting

On, Off
Heating on, heating off (summer mode)
On, Off
1 = Circulation pump 2 = External pump 3 = Cylinder charging pump 4 = Extraction hood 5 = External solenoid valve 6 = External fault message 7 = Solar pump (not active) 8 = eBUS remote control (not active) 9 = Anti-legionella pump (not active) 10 = Solar valve (not active) Switching of relay 1 on the VR 40 "2 in 7" multi-functional module 1 = Circulation pump 2 = External pump 3 = Cylinder charging pump 4 = Extraction hood 5 = External solenoid valve 6 = External fault message 7 = Solar pump (not active) 8 = eBUS remote control (not active) 9 = Anti-legionella pump (not active) 10 = Solar valve (not active)

2 = External pump

Not adjustable
Not adjustable
Not adjustable

2 = External pump

Installation and maintenance instructions ecoTEC pro 0020244995_05

Code Parameter

Values or explanations

D.028 Accessory relay 2 D.029 Water circulation vol. actual value

Switching of relay 2 on the VR 40 "2 in 7" multi-functional module 1 = Circulation pump 2 = External pump 3 = Cylinder charging pump 4 = Extraction hood 5 = External solenoid valve 6 = External fault message 7 = Solar pump (not active) 8 = eBUS remote control (not active) 9 = Anti-legionella pump (not active) 10 = Solar valve (not active)
Actual value in m³/h

Factory setting
2 = External pump

D.033 Fan speed target value

In rpm

D.034 Fan speed actual value

In rpm

D.035 3-way valve position D.036 DHW flow rate

Heating mode Parallel operation (mid-position) DHW mode
In l/min

D.039 Solar inlet temp. actual value

Actual value in °C

D.040 Flow temperature actual value

Actual value in °C

D.041 Return temperature actual value Actual value in °C

D.044 Ionisation value actual value
D.046 Pump mode
D.047 Current outside temperature D.050 Offset min. speed
D.051 Offset max. speed
D.058 Solar post-heating
D.060 Number of safety therm. shutdowns
D.061 No. of shut-downs in ign. flame controller
D.064 Avg. ignition time

Display field 0 to 1020 > 800 no flame < 400 good flame 0 = Relay with disable facility 1 = PWM with disable facility
(with Vaillant weather-compensated control) Actual value in °C In rpm, adjustment range: 0 to 3000
In rpm, adjustment range: -990 to 0
0 = Solar post-heating deactivated 3 = DHW activation target value minimum 60 °C, thermostatic mixing valve required between product and drawoff point Number of shutdowns

0 = Relay with disable facility
Nominal value set in factory Nominal value set in factory 0 = Solar post-heating deactivated

Number of unsuccessful ignitions in the last attempt

In seconds

D.065 Max. ignition time

In seconds

D.067 Remaining anti-cycl. time for heating
D.068 Number of first start attempts

In minutes Number of unsuccessful ignitions

D.069 Number of second start attempts Number of unsuccessful ignitions

Own setting
Not adjustable Not adjustable Not adjustable Not adjustable
Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable
Not adjustable
Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable Not adjustable

0020244995_05 ecoTEC pro Installation and maintenance instructions

Code Parameter D.070 3-way valve operation
D.071 Max. heating target flow temp. D.072 Pump overrun after cylinder char-
ging D.073 Offset setting for comfort mode D.074 Anti-legionella funct. with integ-
rated cyl. D.075 Max. cylinder charging time D.076 Device Specific Number
D.077 DHW partial load D.078 DHW max. flow temperature
D.080 Heating operating hours D.081 DHW operating hours D.082 Heating burner starts D.083 DHW burner starts D.084 Maintenance in D.088 Min. DHW flow rate
D.090 eBUS controller D.091 Status DCF77
D.092 actoSTOR communication status
D.093 Adjust Device Specific Number D.094 Clear fault history
D.095 Software version: PeBUS participant
D.096 Reset to factory settings?

Values or explanations
0 = Normal operating mode 1 = Parallel operation (mid-position) 2 = Permanent heating position 40 to 80 Adjustable from 010 minutes in increments of 1 minute

Factory setting
0 = Normal operating mode
75
2 mins

Own setting

Adjustable from -15 K to 5 K

0 = Off 1 = On

1 = On

2090 min

45 mins

Device specific number = DSN 30 = VUW 246/5-3 (H-GB) ecoTEC pro 24 32 = VUW 286/5-3 (H-GB) ecoTEC pro 28; VUW 286/5-3 (P-GB) ecoTEC pro 28 26 = ecoTEC pro 30 H combi A VUW GB 306/5-3

Adjustable cylinder charging output in kW

Limit on cylinder charging temperature in °C 50 °C 80 °C Note The chosen value must be at least 15 K or 15 °C above the target cylinder value.

In hours (h)

Number of burner start-ups

Adjustment range: 0 to 3000 hrs and "---" for deactivated
Switch-on delay for domestic hot water draw-off detection via impeller (only products with integrated domestic hot water generation) 0 = 1.5 l/min and no delay, 1 = 3.7 l/min and 2 sec. delay
Status of digital control Recognised, not recognised
Status of DCF with outdoor temperature sensor connected No reception Reception Synchronised Valid
actoSTOR module detection 0 = Not connected 1 = Connection fault: No communication via PeBus, actoSTOR module was previously detected 2 = Connection active
Device Specific Number (DSN) Adjustment range: 0 to 99
Delete fault list 0 = No 1 = Yes
PCB (BMU) Display (AI) actoSTOR (APC) HBI/VR34
Reset all adjustable parameters to factory setting 0 = No 1 = Yes

,,---"
1.5 l/min and no delay

Not adjustable
75 °C
Not adjustable Not adjustable Not adjustable Not adjustable
Not adjustable Not adjustable
Not adjustable
Not adjustable

Installation and maintenance instructions ecoTEC pro 0020244995_05

C Status codes Overview
Note Since the code table is used for various products, some codes may not be visible for the product in question.

Code

Meaning

S.00 Heating: No heat demand

Heating has no heat demand. The burner is off.

S.01 Heating mode: Fan start- The fan start-up for heating mode is activated. up

S.02 Heating mode: Pump pre-run
S.03 Heating mode: Ignition

The pump prerun for heating mode is activated. The ignition for heating mode is activated.

S.04 Heating mode: Burner on

The burner for heating mode is activated.

S.05 Heating mode: Pump/fan The pump/fan overrun for heating mode is activated. overrun

S.06 Heating mode: Fan over- The fan overrun for heating mode is activated. run

S.07 Heating mode: Pump overrun
S.08 Heating mode: Anti-cycling time

The pump overrun for heating mode is activated. The anti-cycling time for heating mode is activated.

S.10 DHW demand

The domestic hot water demand is activated.

S.11 DHW mode: Fan start-up The fan start-up for domestic hot water mode is activated.

S.13 DHW mode: Ignition

The ignition for domestic hot water mode is activated.

S.14 DHW mode: Burner on The burner for domestic hot water mode is activated.

S.15 DHW mode: Pump/fan overrun

The pump/fan overrun for domestic hot water mode is activated.

S.16 DHW mode: Fan overrun The fan overrun for domestic hot water mode is activated.

S.17 DHW mode: Pump over- The pump overrun for domestic hot water mode is activated. run

S.20 DHW demand

The domestic hot water demand is activated.

S.21 DHW mode: Fan start-up The fan start-up for domestic hot water mode is activated.

S.22 DHW mode: Pump prerun
S.23 DHW mode: Ignition

The pump prerun for domestic hot water mode is activated. The ignition for domestic hot water mode is activated.

S.24 DHW mode: Burner on The burner for domestic hot water mode is activated.

S.25 DHW mode: Pump/fan overrun

The pump/fan overrun for domestic hot water mode is activated.

S.26 DHW mode: Fan overrun The fan overrun for domestic hot water mode is activated.

S.27 DHW mode: Pump over- The pump overrun for domestic hot water mode is activated. run

S.28 DHW anti-cycling time

The anti-cycling time for domestic hot water mode is activated.

S.30 No heat demand: Controller

Room thermostat blocks heating mode.

S.31 No heat demand: Summer mode

Summer mode is activated; there is no heat demand.

S.32 Waiting time deviation: Fan speed

The waiting period for the fan start-up is activated.

S.34 Heating mode: Frost pro- The frost protection function for heating mode is activated. tection

S.39 Contact thermostat triggered

The surface-mounted thermostat or the condensate pump has triggered.

S.40 Comfort protection active
S.41 Water pressure too high

The comfort protection mode is activated. The system pressure is too high.

S.42 Flue non-return flap closed

Flue non-return flap return signal blocks burner operation (only in conjunction with the multi-functional module) or condensate pump defective, heat demand is blocked.

0020244995_05 ecoTEC pro Installation and maintenance instructions

Code

Meaning

S.46 Comfort protection: Min- Comfort protection mode for flame loss at minimum load is activated. imum load, loss of flame

S.53 Waiting time: Water shortage

The product is within the waiting period of the modulation block/operating block function as a result of a water deficiency (flow/return spread too large).

S.54 Waiting time: Water shortage

Product is in the waiting period of the operation blocking function as a result of low water pressure (temperature gradient).

S.57 Waiting time: Measuring The product is within the waiting period as a result of the measuring programme. program

S.58 Burner modulation limitation
S.61 Fault: Incorrect gas type

The burner modulation limitation is activated. The coding resistor on the PCB does not match the entered gas group (see also F.92).

S.62 Adjust CO2 S.63 Fault: Check gas route

Set the CO2 content. A fault message is activated. Check the gas route.

S.76 Service message: Check A service message is activated. Check the water pressure. water pressure

S.88 Purging programme is running
S.92 Water circulation volume self-test

The purge programme is activated. The self-test for the water circulation volume is activated.

S.93 Flue gas measurement not possible

Flue gas analysis is not currently possible.

S.96 Return temperature sensor self-test

The self-test for the return temperature sensor is activated.

S.97 Water pressure sensor self-test

The self-test for the water pressure sensor is activated.

S.98 Flow/return temperature The self-test for the flow/return temperature sensor is activated. sensor self-test

S.99 Vaillant self-test

The Vaillant self-test is activated.

D Overview of fault codes

Note Since the code table is used for various products, some codes may not be visible for the product in question.

Code/meaning F.00 Interruption: Flow sensor
F.01 Interruption: Return sensor
F.10 Short circuit: Flow sensor
F.11 Short circuit: Return sensor F.20 Safety switch-off: Temperature limiter
F.22 Safety switch-off: Low water pressure
F.23 Safety switch-off: Temp.spread too large
F.24 Safety switch-off: Temp. incr. too fast

Possible cause
Flow temperature sensor defective or not connected Return temperature sensor defective or not connected Flow temperature sensor defective or has short-circuited Return temperature sensor defective or has short-circuited Maximum temperature at the flow/return temperature sensor is too high when the safety cutout function is operating using the NTC No/insufficient water in the product or the water pressure is too low
Temperature spread too great. Water circulation too low
Temperature increase too fast

Measure
Check: Flow temperature sensor, plug, cable harness, PCB.
Check: Return temperature sensor, plug, cable harness, PCB.
Check: NTC plug, cable harness, cable/housing, PCB, NTC
sensor.
Check: NTC plug, cable harness, housing, PCB, NTC sensor.
Check: Flow temperature sensor (correct thermal connection),
cable harness, sufficient purging.
1. Check: Plug, cable to heating pump or water pressure sensor, water pressure sensor, heating pump.
2. Activate and purge check programme P.0.
Check: Plug, cable to heating pump/water pressure sensor,
air/insufficient water in the heating circuit, flow and return temperature sensor inverted, strainer in the hydraulic block, water pressure sensor, heating pump (sufficient circulation, level 2: D.19, D.14, non-return valve). Activate check programme P.0.
Check: Plug, cable to the heating pump, air/insufficient water
in the heating circuit, internal air vent (function), heating pump (system pressure too low, temperature gradient too great on heating flow, non-return valve). Activate check programme P.0.

Installation and maintenance instructions ecoTEC pro 0020244995_05

Code/meaning F.25 Safety switch-off: Flue temp. too high
F.26 Fault: Fuel valve not working F.27 Safety switch-off: Flame simulation F.28 Start-up failure: Ignit. unsuccessful
F.29 Operating failure: Ignit. unsuccessful F.32 Fault: Fan F.49 Fault: eBUS F.61 Fault: Fuel valve actuation F.62 Fault: Fuel valve switch-off delay F.63 Fault: EEPROM F.64 Fault: Electronics/sensor
F.65 Fault: Electronics temp.
F.67 Fault: Electronics/flame F.68 Fault: Flame signal unstable F.70 Fault: Invalid Device Specific Number F.71 Fault: Flow sensor F.72 Fault: Flow/return sensor
F.73 Fault: Water press. sensor (signal too weak) F.74 Fault: Water press. sensor (signal too strong) F.75 Fault: Pump/ water shortage
F.77 Fault: Flue non-ret. valve/condens. pump F.78 Interrupt.: DHW outlet sensor on ext. contr.

Possible cause flue gas temperature too high
Gas valve assembly stepper motor defective or not connected Monitoring electrode reports an incorrect flame Failure during start-up or ignition unsuccessful. Gas pressure monitor or thermal cut-out has been triggered.
Gas supply interrupted intermittently. Re-ignition failed.
Fan defective or not connected
Undervoltage on the eBUS
The gas valve assembly cannot be actuated Delayed switch-off sequence for the gas valve after the flame is extinguished EEPROM faulty Electronics, safety-relevant sensor or cable defective
Electronics defective or too hot due to external influences Implausible flame signal Flame monitor reports an unstable flame signal
Incorrect/missing Device Specific Number or incorrect/missing coding resistor Flow temperature sensor returns implausible values Temperature difference between flow and return temperature sensor is too great Water pressure sensor reports that the water pressure is too low Water pressure too high
Insufficient pressure jump detected when starting the pump
No flue non-return flap feedback; condensate pump overflow UK link box is connected without the domestic hot water temperature sensor being bridged

Measure
Check: Plug, safety cut-out plug, cable harness, cable to the
heating pump, internal air vent (function), flue gas route (blockage, adverse wind conditions, flue pipework too long), insufficient water in heating circuit, heating pump, activate check programme P.0.
Check: Gas valve assembly stepper motor (plug, cable, pas-
sage for rinsing, voltage), multiple plug, cable harness.
Check: Gas pressure at upper test opening, monitoring elec-
trode, PCB, gas solenoid valve.
Check: Gas stopcock, gas flow pressure, gas valve assembly,
air intake pipe (blockage, loosened screw), condensate route (blockage), multiple plug, cable harness, ignition transformer, ignition cable, ignition plug, ignition electrode, monitoring electrode, electronics, earthing, CO setting.
Check: Flue gas recirculation, condensate route (blockage),
earthing, cable to the gas valve assembly and electrode (loose connection).
Check: Plug, cable harness, fan (blockage, function, correct
speed), Hall sensor, PCB, flue gas route (blockage).
Check: eBUS (overload, two power supplies with different po-
larities, short circuit).
Check: Cable harness, plug, gas valve assembly (rinse), PCB.
Check: Gas valve, surface of the burner (dirt), plug, cable har-
ness, PCB.
Replace: PCB. Check: Flow sensor, cable to the sensor, flame recording
sensor (e.g. ionisation electrode) for an unstable signal, electronics.
1. Check: PCB. 2. If required, reduce the environmental temperature.
Check: Cable harness, flame monitor, PCB. Check: Air ratio, gas flow pressure, condensate route (block-
age), gas injector, ionisation flow (cable, electrode), flue gas recirculation.
If the display and PCB have been replaced, change the Device
Specific Number under D.93.
Check: Flow temperature sensor (correct thermal connection).
Check: Flow temperature sensor/return temperature sensor
(function, correct thermal connection).
Check: Water pressure, earth connection, cable, plug, water
pressure sensor (short circuit to GDN).
1. Drain water. 2. Check the water pressure sensor.
1. Check: Water pressure sensor, heating pump (blockage), heating circuit (air, sufficient water volume), adjustable bypass, external expansion vessel (must be connected at the return). Activate check programme P.0.
2. If a low loss header or heating pipes with a diameter greater than 1 1/2 inch are installed, replace the 3/4-inch seal in the heating flow with a screen. If required, install the F.75 service set.
Check: Cable to VR40 accessory, flue non-return flap (wiring,
feedback switch), condensate pump, bridge from the surfacemounted thermostat, 2 in 7 multi-functional module (bridge).
1. Check: Accessory (configuration/electrical connection). 2. The unit displays a fault, but the unit has not malfunctioned.

0020244995_05 ecoTEC pro Installation and maintenance instructions

Code/meaning F.83 Fault: NTC temp. gradient
F.84 Fault: NTC temp. diff. implausible F.85 Fault: NTCs fitted incorrectly
Communication fault

Possible cause
Temperature difference between flow and return temperature sensor is too small
Temperature difference is implausible
Flow/return temperature sensors returning incorrect/implausible values
Communication fault between the display and the PCB in the electronics box

Measure
Check: Flow/return temperature sensor (function, correct
thermal connection), sufficient water volume.
Check: Flow/return temperature sensor (correct thermal con-
nection, sensors are inverted).
Check: Flow/return temperature sensor (correct thermal con-
nection).
Check: Cable/plug between the display and the PCB.

E Check programmes Overview

Check programme P.00 Purging
P.01 Maximum load P.02 Minimum load P.06 Filling mode

Meaning
The internal pump is cyclically actuated. The heating circuit and the domestic hot water circuit are adaptively purged by automatically switching the circuits using the automatic air vent (the automatic air vent's cap must be loose). The active circuit is shown in the display. Press once to start purging the heating circuit. Press once to end the purge programme. Note: The purge programme runs for 7.5 min per circuit and then terminates. Purging the heating circuit: Prioritising diverter valve in heating position, actuation of internal pump for 9 cycles: 30 sec. on, 20 sec. off. Display: Active heating circuit. Purging the domestic hot water circuit: After the above-mentioned cycles have run or the righthand selection button has been pressed again: Prioritising diverter valve in the domestic hot water position, actuation of the internal pump as above. Display: Active domestic hot water circuit.
After successful ignition, the product is operated at maximum heat input.
After successful ignition, the product is operated at minimum heat input.
The prioritising diverter valve is moved to the mid-position. The burner and pump are switched off (to fill or drain the product).

Installation and maintenance instructions ecoTEC pro 0020244995_05

F Wiring diagrams
F.1 Product connection diagram with integrated hot water generation

X22

4 2

1 2
X41 3
4 5 6

2 15 12 13

X51

8
X20 7
5

X51

Burner Off RT 24V BUS
B.off RT BUS

X40 X51 X30
X90 1

X31

X35

X20

X22

X41

X106

18 7
17 8

13 11

3 2 6

4 12

24V

230V~

CH Pump

Fuse

X18
T2 X1
X12

L
X18 N

X1 N

3 4

1 +24V 2 Hallsignal
4 PWM 5 Masse

6 7
8
9 10 11

1
3M

1 3

24V 230V~

Main PCB

Operator control panel PCB

Outside temperature sensor, flow temperature

sensor (optional, external), DCF receiver

Circulation pump remote control

Gas valve

Return temperature sensor

Flow temperature sensor

Fan

Contact thermostat/burner off

24 V DC room thermostat

Bus connection (digital room thermostat/controller)

Diverter valve

Water pressure sensor

Impeller sensor

Warm start sensor

Internal pump

Ignition electrode

Depending on product type

0020244995_05 ecoTEC pro Installation and maintenance instructions

G Commissioning Checklist
Benchmark Commissioning & Warranty Validation Service Record
It is a requirement that the boiler is installed and commissioned to the manufacturers' instructions and the data fields on the commissioning checklist completed in full. To instigate the boiler warranty the boiler needs to be registered with the manufacturer within one month of the installation. The warranty rests with the end-user (consumer), and they should be made aware it is ultimately their responsibility to register with the manufacturer, within the allotted time period. It is essential that the boiler is serviced in line with the manufacturers' recommendations, at least annually. This must be carried out by a competent Gas Safe registered engineer. The service details should be recorded on the Benchmark Service and Interim Boiler Work Record and left with the householder. Failure to comply with the manufacturers' servicing instructions and requirements will invalidate the warranty.

www.hhic.co.uk
This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission according to the manufacturers' instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect the customer's statutory rights.

* All installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A Building Regulations Compliance Certificate will then be issued to the customer.
© Heating and Hotwater Industry Council (HHIC)

www.centralheating.co.uk

Installation and maintenance instructions ecoTEC pro 0020244995_05

GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD

Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Company name: Company email:
Heating and hot water system complies with the appropriate Building Regulations?

Gas Safe registration number: Telephone number: Company address:

Commissioning date: Yes

Time, temperature control and boiler interlock provided for central heating and hot water

Yes

Boiler Plus requirements (tick the appropriate box(s))

Boiler Plus option chosen for combination boiler in ENGLAND

Weather compensation Load compensation

Smart thermostat with automisation and optimisation Flue Gas Heat Recovery

Time and temperature control to hot water

Cylinder thermostat and programmer/timer

Combination boiler

Zone valves Thermostatic radiator valves Automatic bypass to system
Water quality

pre-existing pre-existing pre-existing pre-existing

Fitted Fitted Fitted Fitted

instructions

Not required Not required Not required Not required
Yes

What system cleaner was used? What inhibitor was used?
pre-existing CENTRAL HEATING MODE measure and record (as appropriate)

Brand: Brand:

Fitted

Product: Product:

Not required

Gas rate (for combination boilers complete DHW mode gas rate)

m3/hr

ft3/hr

Central heating output left at factory settings?

Yes

If no, what is the maximum central heating output selected?

Dynamic gas inlet pressure

mbar

°C

Central heating return temperature

°C

System correctly balanced/rebalanced?

Yes

COMBINATION BOILERS ONLY

Is the installation in a hard water area (above 200ppm)?

Yes

Water scale reducer/softener

pre-existing

Fitted

Not required

Brand:

Product:

Yes

If yes- DHW expansion vessel

pre-existing

Fitted

Not required

Pressure reducing valve

pre-existing

Fitted

Not required

DOMESTIC HOT WATER MODE Measure and record

Gas rate

m3/hr

ft3/hr

Dynamic gas inlet pressure at maximum rate

mbar

Cold water inlet temperature

°C

Hot water has been checked at all outlets

Yes

Temperature

°C

CONDENSATE DISPOSAL

The condensate drain has been installed in accordance with the manufacturers' instructions and/or BS5546/BS6798

Yes

Point of termination

Internal

External (only where internal termination impractical)

Method of disposal

Gravity

Pumped

ALL INSTALLATIONS

Record the following

At max rate:

At min rate (where possible) CO

ppm CO2

% CO/CO2

ppm CO2

% CO/CO2

instructions, and readings are correct?

Ratio Ratio Yes

The operation of the boiler and system controls have been demonstrated to and understood by the customer

Yes

The manufacturers' literature, including Benchmark Checklist and Service Record, has been explained and left with the customer

Yes

Commissioning Engineer's signature

Customer's signature

www.centralheating.co.uk

0020244995_05 ecoTEC pro Installation and maintenance instructions

SERVICE & INTERIM BOILER WORK RECORD
It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers' instructions, and that the appropriate service / interim work record is completed.
Service provider When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers' instructions. Always use the

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

www.centralheating.co.uk

Installation and maintenance instructions ecoTEC pro 0020244995_05

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate Date:

Engineer name: Telephone No: Max rate CO Min rate CO

Company name:

Gas Safe registration No:

ppm CO² ppm CO²

% CO/CO² % CO/CO²

undertaken in accordance with manufacturers'

yes

instructions, and readings are correct?"

Gas rate:

m3/h

delete as appropriate Yes

ft3/h No

System inhibitor concentration has been checked and

appropriate action taken, in accordance with BS 7593

yes

n/a

appropriate action taken, in accordance with BS 7593

yes

n/a

and boiler manufacturers' instructions. *

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

www.centralheating.co.uk

0020244995_05 ecoTEC pro Installation and maintenance instructions

H Commissioning Flow Chart

NOTE THE AIR GAS RATIO VALVE IS FACTORY
SET AND MUST NOT BE ADJUSTED DURING COMMISSIONING UNLESS THIS ACTION IS RECOMMENDED FOLLOWING CONTACT WITH THE MANUFACTURER. If any such adjustment is recommended and further checking of the boiler is required the installer/service engineer must be competent to carry out this work and to use the flue gas
analyser accordingly. If the boiler requires conversion to operate with
a different gas family (e.g. conversion from natural gas to LPG) separate guidance will be
provided by the boiler manufacturer

PRIOR TO CO AND COMBUSTION RATIO CHECK The boiler manufacturer's installation instructions should have been followed, gas type verified and gas
supply pressure/rate checked as required prior to commissioning. As part of the installation process, especially where a flue has been fitted by persons other than the boiler installer, visually check the integrity of the whole flue system to confirm that all components are
correctly assembled, fixed and supported. Check that manufacturer's max. flue lengths have not been exceeded and all guidance has been followed (e.g. Gas Safe Technical Bulletin TB008). The flue gas analyser should be of the correct type, as specified by BS 7967
Prior to its use, the flue gas analyser should have been maintained and calibrated as specified by the manufacturer. The installer must have the relevant competence for use of the analyser. Check and zero the analyser IN FRESH AIR as per analyser manufacturer's instructions.
SET BOILER TO MAXIMUM RATE In accordance with boiler instructions, set boiler to operate at max. rate
(full load condition). Allow sufficient time for combustion to stabilise. NOTE - Do not insert analyser probe during this period to avoid
possible "flooding" of sensor.

VERIFY FLUE INTEGRITY Analyser readings indicate that combustion products and inlet air must be mixing. Further investigation of
the flue is therefore required. Check that flue components are assembled, fixed and supported as per boiler/flue manufacturer's
instructions. Check that flue and flue terminal are not obstructed.

Is
O2 20.6% and
CO2 < 0.2%

YES

TURN OFF APPLIANCE AND CALL MANUFACTURER'S TECHNICAL HELPLINE
FOR ADVICE. THE APPLIANCE MUST NOT BE COMMISSIONED UNTIL PROBLEMS ARE
IDENTIFIED AND RESOLVED.

Check all seals around the appliance burner, internal flue seals, door and case seals. Rectify where necessary.

Is CO less than
335ppm and
CO/CO2 ratio less than 0.004

YES

TURN OFF APPLIANCE AND CALL MANUFACTURER'S TECHNICAL HELPLINE
FOR ADVICE. THE APPLIANCE MUST NOT BE COMMISSIONED UNTIL PROBLEMS ARE IDENTIFIED AND RESOLVED. IF COMMISSIONING CANNOT BE FULLY COMPLETED, THE APPLIANCE MUST BE DISCONNECTED FROM THE GAS SUPPLY IN ACCORDANCE WITH THE GSIUR. NOTE: Check and record CO and combustion ratio at both max. and min. rate before contacting the
manufacturer.

CARRY OUT FLUE INTEGRITY CHECK USING ANALYSER Insert analyser probe into air inlet test point and allow readings to stabilise. NOTE - where no air inlet test point is provided then a flue integrity check
with the analyser is not possible. The installer should verify that flue integrity has been visually checked in accordance with the "Prior to
CO and combustion ratio check" box above before proceeding to the "Check CO and combustion ratio at maximum rate" stage below.

Is O2 20.6%
and CO2 < 0.2%
YES

CHECK CO AND COMBUSTION RATIO AT MAX. RATE With boiler still set at maximum rate, insert analyser probe into flue gas
sampling point. Allow readings to stabilise before recording. NOTE - If no flue gas sampling point is present and the correct procedure is
not specified in the manual, consult boiler manufacturer for guidance.

Is
CO less than
350ppm and
CO/CO2 ratio less than 0.004

YES

SET BOILER TO MINIMUM RATE In accordance with boiler instructions, set boiler to operate at minimum rate (to
minimum load condition). Allow sufficient time for combustion to stabilise. NOTE - If manufacturer's instructions do not specify how to set boiler to minimum
rate contact Technical Helpline for advice.
CHECK CO AND COMBUSTION RATIO AT MINIMUM RATE With boiler still set at minimum rate, insert analyser probe into flue gas sampling
point. Allow readings to stabilise before recording. NOTE - If no flue gas sampling point is present and the correct procedure is not
specified in the manual, consult boiler manufacturer for guidance.
Is CO less than 350ppm and CO/CO2 ratio less than 0.004
YES
BOILER IS OPERATING SATISFACTORILY no further actions required.
Ensure test points are capped, boiler case is correctly replaced and all other commissioning procedures are completed.
Complete Benchmark Checklist, recording CO and combustion ratio readings as required.

Installation and maintenance instructions ecoTEC pro 0020244995_05

Index
8 80/125 mm diameter unit connection piece, installing ........ 23 A Air index setting................................................................... 30 Air/flue pipe ......................................................................... 23 Air/flue pipe, horizontal wall duct......................................... 17 Air/flue pipe, type C13 ......................................................... 17 Air/flue pipe, type C33 ......................................................... 17 Air/flue pipe, vertical roof duct ............................................. 17 Article number ............................................................... 1112 Automatic air vent................................................................ 28 B Burner anti-cycling time....................................................... 31 Burner anti-cycling time, resetting ....................................... 32 Burner anti-cycling time, setting .......................................... 32 Burner, checking ................................................................. 35 Burner, replacing ................................................................. 37 Bypass valve, setting........................................................... 32 C Calling up, diagnostics codes ............................................. 31 CE marking.......................................................................... 11 Check programmes ............................................................. 28 Checking, burner ................................................................. 35 Checking, CO content ........................................................ 30 Checking, pre-charge pressure for the internal expansion vessel .................................................................................. 36 Circulation pump ................................................................. 25 Cleaning, cold water inlet filter ............................................ 35 Cleaning, heat exchanger .................................................. 35 CO content, checking......................................................... 30 CO content, setting ............................................................ 30 Cold water connection......................................................... 20 Cold water inlet filter, cleaning ............................................ 35 Comfort protection mode..................................................... 37 Compact thermal module, installing .................................... 36 Compact thermal module, removing ................................... 34 Condensate discharge pipe................................................. 20 Condensate siphon ....................................................... 28, 35 Condensate trap............................................................ 28, 35 Connecting, control ............................................................. 24 Connection dimensions ....................................................... 13 Control, connecting ............................................................. 24 D Decommissioning ................................................................ 39 Decommissioning, temporarily ............................................ 39 Diagnostics codes, calling up .............................................. 31 Display and setting options ................................................. 26 Disposal, packaging ............................................................ 39 Disposing of the packaging ................................................. 39 Documents .......................................................................... 11 Drain pipe, expansion relief valve ....................................... 20 Draining, product ................................................................. 36 E Electronics box, closing....................................................... 23 Electronics box, opening ..................................................... 23 F Factory settings, restoring ................................................... 37 Fan, replacing...................................................................... 38 Fault codes.......................................................................... 37 Fault memory, calling up ..................................................... 37 Fault memory, deleting........................................................ 37 Fault messages ................................................................... 37

Filling ................................................................................... 28 Flue pipe equipment connection piece................................ 23 Frost protection ................................................................... 12 G Gas connection value.......................................................... 29 Gas conversion ................................................................... 29 Gas Council Number ........................................................... 11 Gas group............................................................................ 19 Gas setting .......................................................................... 29 Gas type .............................................................................. 19 Gas valve, replacing............................................................ 38 Guarantee and Customer Service......................................... 7 H Handing over to the end user .............................................. 33 Heat exchanger, cleaning.................................................... 35 Heat exchanger, replacing .................................................. 38 Heating flow......................................................................... 20 Heating installation, purging ................................................ 29 Heating return...................................................................... 20 Hot water connection........................................................... 20 I Identification plate ............................................................... 11 Inspection work, carrying out............................................... 34 Inspection work, completing ................................................ 36 Installer level ....................................................................... 26 Installer level, calling up ...................................................... 26 Intended use.......................................................................... 4 Internal expansion vessel, replacing ................................... 39 Isolator devices ................................................................... 39 K Kammerbelüftung ................................................................ 14 L Leak-tightness ......................................................... 31, 37, 39 Liquid gas ........................................................................ 6, 19 M Maintenance interval, setting............................................... 32 Maintenance work, carrying out .......................................... 34 Maintenance work, completing............................................ 36 Manometer .......................................................................... 12 Minimum clearance ............................................................. 14 O Operating concept ............................................................... 26 Overheating protection ........................................................ 12 P PCB and display, replacing ................................................. 39 PCB or display, replacing .................................................... 39 Power supply....................................................................... 24 Pre-charge pressure for the internal expansion vessel, checking .............................................................................. 36 Preparing, maintenance work.............................................. 34 Preparing, repair work ......................................................... 37 Product dimensions............................................................. 13 Product, draining ................................................................. 36 Product, switching off .................................................... 28, 39 Product, switching on .......................................................... 28 Pump output, setting ........................................................... 32 Pump, remaining feed head ................................................ 32 Purging, heating installation ................................................ 29 R Regulations ........................................................................... 6 Remaining feed head, pump ............................................... 32 Removing, compact thermal module................................... 34 Repair work, completing...................................................... 39 Repair work, preparing .................................................. 34, 37

0020244995_05 ecoTEC pro Installation and maintenance instructions

Replacing the burner ........................................................... 37 Replacing, fan ..................................................................... 38 Replacing, gas valve ........................................................... 38 Replacing, heat exchanger.................................................. 38 Replacing, PCB and display................................................ 39 Replacing, PCB or display................................................... 39 S Safety devices ..................................................................... 12 Scale ................................................................................... 19 Scale deposition .................................................................. 19 Scope of delivery................................................................. 13 Serial number ...................................................................... 12 Service message................................................................. 37 Setting, CO content............................................................ 30 Setting, maintenance interval .............................................. 32 Setting, pump output ........................................................... 32 Side section, installing......................................................... 18 Side section, removing ........................................................ 18 Spare parts.......................................................................... 37 Status codes........................................................................ 26 Switching off ........................................................................ 39 T Technical data ....................................................................... 8 Treating the heating water................................................... 27 U Unit connection piece for the air/flue pipe, 80/125 mm diameter .............................................................................. 23 Unit connection piece for the air/flue pipe, replacing .......... 23 Unit connection piece, removing ......................................... 23 V Validity of the instructions.................................................... 11 W Weight ................................................................................. 17

Installation and maintenance instructions ecoTEC pro 0020244995_05

Supplier Vaillant Ltd. Nottingham Road Belper Derbyshire Telephone 03301003461 info@vaillant.co.uk www.vaillant.co.uk

DE56 1JT

0020244995_05

Publisher/manufacturer Vaillant GmbH Berghauser Str. 40 D-42859 Remscheid Tel. +492191180 Fax +492191182810 info@vaillant.de www.vaillant.de
© These instructions, or parts thereof, are protected by copyright and may be reproduced or distributed only with the manufacturer's written consent. Subject to technical modifications.

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