Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual
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Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

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Installation and maintenance instructions
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40
D-42859 Remscheid
Tel. +49 21 91 18‑0
Fax +49 21 91 18‑2810
info@vaillant.de
www.vaillant.de
Installation and maintenance instructions
ecoTEC sustain
24, 28, 34
GB

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  • Page 1 Installation and maintenance instructions Installation and maintenance instructions ecoTEC sustain 24, 28, 34 Publisher/manufacturer Vaillant GmbH Berghauser Str. 40 D-42859 Remscheid Tel. +49 21 91 18‑0 Fax +49 21 91 18‑2810 info@vaillant.de www.vaillant.de...

  • Page 2: Table Of Contents

    Contents Contents Filling the hot water circuit ........20 Switching the product on and off ......20 Safety ..............4 7.10 Checking the gas settings ........20 Action-related warnings ......... 4 7.11 Checking leak-tightness ........22 Intended use ............4 Adapting the unit to the installation ....
  • Page 3 Contents Wiring diagrams..........41 Wiring diagram............. 41 Wiring diagram............. 42 Inspection and maintenance work – Overview............. 43 Opening in the flue pipe........44 Positioning of the opening of a fan-supported flue gas pipe ............44 Horizontal terminal positioning ......45 Commissioning Checklist.........

  • Page 4: Safety

    1 Safety Safety this document shall be considered improper use. Any direct commercial or industrial use Action-related warnings is also deemed to be improper. Classification of action-related warnings Caution. The action-related warnings are classified in Improper use of any kind is prohibited. accordance with the severity of the possible danger using the following warning signs and General safety information...
  • Page 5 Safety 1 ▶ Notify the gas supply company or the Na- 1.3.8 Risk of death due to explosive and flammable materials tional Grid +44 (0) 800 111999 by tele- phone once you are outside of the build- ▶ Do not use or store explosive or flammable ing.

  • Page 6: Regulations (Directives, Laws, Standards)

    1 Safety 1.3.13 Risk of being burned or scalded by hot components ▶ Only carry out work on these components once they have cooled down. 1.3.14 Risk of material damage caused by using an unsuitable tool ▶ Use the correct tool to tighten or loosen screw connections.

  • Page 7: Notes On The Documentation

    VUW 346/7-2 (H- 47-044-81 Benchmark Vaillant is a licensed member of the Benchmark Scheme. Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is...

  • Page 8: Information On The Identification Plate

    4 Set-up Information on the identification plate Serial number The identification plate is mounted on the underside of the The serial number can be found on a plastic label at the bot- product in the factory. tom of the front casing and on the identification plate. The identification plate keeps record of the country in which CE label the product is to be installed.

  • Page 9: Unpacking The Product

    Set-up 4 ▶ Dimensions If the unit is being lifted by two persons, ensure your movements are coordinated during lifting. ▶ If required, get somebody to assist you in this. Unpacking the product Remove the product from its box. Remove the protective film from all parts of the product. Checking the scope of delivery ▶...

  • Page 10: Minimum Clearances

    4 Set-up Wall-mounting the product Flue pipe wall duct Product holder A = see installation R1 tundish/condensate template (60/100 mm siphon connection diameter air/flue pipe) Flue pipe connection A = 235 mm (80/125 mm diameter air/flue pipe) Consult the installation template that is supplied to find the dimension A.

  • Page 11: Removing The Front Casing

    Installation 5 Removing the front casing 4.10 Removing the side section ▶ Remove the front casing as shown in the illustration. Caution. Risk of material damage caused by mech- anical deformation. Removing both side sections may cause mechanical distortion in the product, which may cause damage to the piping, for ex- ample, and potentially result in leaks.

  • Page 12: Installation Requirements

    5 Installation Installation requirements Caution. Risk of material damage due to the gas 5.1.1 Information on liquid gas operation leak-tightness test. In the as-delivered condition, the product is preset for opera- At a test pressure of >11 kPa (110 mbar), gas tion with the gas group indicated on the identification plate.

  • Page 13: Gas And Water Connections

    Installation 5 ▶ Gas and water connections Connect a condensate discharge pipe (21.5 mm, not in- cluded in the scope of delivery) to the condensate dis- charge hose (2). ▶ 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.

  • Page 14: Electrical Installation

    5 Installation 5.5.2 Replacing the connection piece for the air/flue pipe as required Replace the connection piece for the air/flue pipe as required. The product-specific standard equipment is listed under Technical data. Remove the connection piece for the air/flue pipe – this is installed at the factory.
  • Page 15 Installation 5 5.6.2 Cable route 24-V eBUS cable route Route a three-core power supply cable that complies with the relevant standards through the grommet and 230-V eBUS cable route into the product. Observe the routing of the power supply cable (1) in the 5.6.3 Wiring grommet in order to guarantee that there is no strain.

  • Page 16: Operation

    6 Operation Conditions: If you are connecting a controller (230 V). 230V~ 230V~ ▶ Connect the controller to the main plug. ▶ Remove the bridge from the plug 24V=RT. Close the electronics box. Conditions: Connecting a limit thermostat for underfloor heating Wire the unit.

  • Page 17: Installer Level Overview

    Operation 6 Installer level overview Using diagnostics codes You can use the parameters marked as adjustable in the table of diagnostics codes to adapt the product to the system and customer requirements. 6.4.1 Setting a diagnostics code Call up the installer level. (→ Page 17) ◁...

  • Page 18: Start-Up

    7 Start-up ◁ Checking and treating the heating The heating water temperature and the filling pres- sure for the heating installation are shown altern- water/filling and supplementary water ately in the display. Caution. Press to return to the check programme. Risk of material damage due to poor-qual- ◁...

  • Page 19: Preventing Low Water Pressure

    Start-up 7 Filling the condensate siphon 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 frost and cor- rosion protection agents, biocides or seal- ants.

  • Page 20: Filling The Hot Water Circuit

    7 Start-up ▶ Check programmes – Overview (→ Page 34) Measure the gas flow rate at the gas meter. ▶ ◁ Compare the measured values with the corresponding The diverter valve is moved to the mid-position. values in the table. Fill with water until the required filling pressure is Qnw from H gas in m³/h...
  • Page 21 Start-up 7 7.10.4 Thoroughly flushing the heating installation any blockage in the pipework or if the pipework is un- dersized. ("hot") Operate the appliance until the boiler and the heating Conditions: Gas flow pressure not in the permissible range system are up to temperature. Caution.

  • Page 22: Checking Leak-Tightness

    8 Adapting the unit to the installation Adapting the unit to the installation Checking the CO₂ content Great Britain Activating diagnostics codes Fitted front casing You can find the setting options in the diagnostics codes in Natural Liquid the installer level. ▶...

  • Page 23: Setting The Maximum Heating Output

    Adapting the unit to the installation 8 8.2.2 Resetting the remaining burner anti-cycling Setting the pump output time Applicability: VUW 246/7-2 (H-GB) ▶ Press and hold the button for more than three OR VUW 286/7-2 (H-GB) seconds. OR VUW 346/7-2 (H-GB) ◁...

  • Page 24: Setting The Bypass

    9 Troubleshooting Setting the hot water temperature Saturation 17 kPa Available pressure (kPa) Throughput in circuit Danger! (l/h) Risk of death from Legionella. Setting the bypass Legionella multiply at temperatures below 60 °C. Conditions: D.14 is set to 0 = auto ▶...

  • Page 25: Rectifying Faults

    Troubleshooting 9 Rectifying faults 9.6.1 Procuring spare parts ▶ If fault codes (F.XX) are present, refer to the table in the The original components of the product were also certified appendix for advice or use the check programme(s). by the manufacturer as part of the declaration of conformity. If you use other, non-certified or unauthorised parts during Overview of fault codes (→...
  • Page 26 9 Troubleshooting 9.7.2 Replacing the fan or gas valve 14. 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 for this. 15.
  • Page 27 Troubleshooting 9 9.7.5 Replacing the main PCB 12. Insert the flow and return connections into the heat exchanger as far as they will go. 13. Ensure that the clamps are correctly fitted to the flow and return connections. 14. Fill and purge the unit and, if required, the heating sys- tem.

  • Page 28: Completing Repair Work

    10 Inspection and maintenance 9.7.7 Replacing the expansion relief valve 9.7.10 Replacing the power supply cable Note The cable must be replaced by the manufacturer, its customer service or suitably qualified persons in order to avoid danger. ▶ If the power supply cable is damaged, replace it in ac- cordance with the recommendations for the power supply connection (→...

  • Page 29: Checking The Co₂ Content

    Inspection and maintenance 10 10.3 Checking the CO₂ content 10.4 Setting the CO₂ content Start up the product with the check programme (P.01) Conditions: The CO₂ content must be adjusted and set the value. – Setting value for the programme P.01: 100 Check programmes –...

  • Page 30: Preparing The Maintenance Work

    10 Inspection and maintenance 10.7 Removing the compact thermal module Great Britain Natural gas Note Removed front Fitted front cas- The compact thermal module consists of four casing main components: – Speed-regulated fan, ≤ 250 ppm ≤ 250 ppm CO at full load –...

  • Page 31: Cleaning The Heat Exchanger

    Inspection and maintenance 10 10.9 Checking the burner Remove the ignition line plug (3) and the earth line plug (4) from the ignition electrode. Remove the plugs (1) and (8) from the fan motor. Remove the plug (2) from the gas valve. Check the surface of the burner (1) for damage.

  • Page 32: 10.11 Cleaning The Condensate Siphon

    10 Inspection and maintenance – 10.13 Cleaning the heating filter Distance between the ignition and flame control electrodes: 3.5 … 4.5 mm Make sure that the seal (5) is free from damage. ▽ If necessary, replace the seal. 10.11 Cleaning the condensate siphon Drain the product.

  • Page 33: 10.15 Checking The Product For Leak-Tightness

    Connect the gas pipe using a new seal. In the process, that arrangements are made for a Maintenance Agreement. secure the gas pipe against twisting. Please contact Vaillant Service Solutions for further details: Open the gas isolator cock. Telephone: 0330 100 3461 Make sure that there are no leaks.

  • Page 34: Appendix

    Appendix Appendix Check programmes – Overview Display Meaning P.00 Purging the hot water and heating circuit: The function is activated in the small hot water circuit for three minutes and then in the heating circuit for one minute. The pump runs and stops at regular intervals. If required, this function can be manually switched off.
  • Page 35 Appendix Dia- Values Default set- gnostics Parameter Unit Increment, select, explanation Own setting ting Min. Max. code ℃ – – d.09 Heating flow set target Current value temperature that is set adjustable on the eBUS room ther- mostat – – d.10 Status of the internal Current value...
  • Page 36 Appendix Dia- Values Default set- gnostics Parameter Unit Increment, select, explanation Own setting ting Min. Max. code – d.27 Function of relay 1 1 = Circulation pump Adjustable (multi-functional module) 2 = External pump 3 = Cylinder charging pump 4 = Extractor hood 5 = External solenoid valve 6 = External fault message 7 = Solar pump (omitted)
  • Page 37 Appendix Dia- Values Default set- gnostics Parameter Unit Increment, select, explanation Own setting ting Min. Max. code – – d.67 Remaining burner anti- Current value cycling time (setting un- adjustable der d.02) – – – d.68 Number of unsuccessful Current value ignitions at 1st attempt adjustable –...

  • Page 38: C Status Codes - Overview

    Appendix Status codes – Overview Note Since the code table is used for various products, some codes may not be visible for the product in question. Status code Meaning Displays in heating mode S.00 Heating mode: No requirement S.01 Heating mode: Advance fan operation S.02 Heating mode: Pump pre-run S.03...

  • Page 39: D Overview Of Fault Codes

    Appendix 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. If faults occur, some of them can be reset. To do so, press and hold the button for three seconds.
  • Page 40 Appendix Fault code Meaning Possible cause F.71 Fault: Flow/return temperature sensor Flow temperature sensor specifies a constant value: Flow temperature sensor incorrectly attached to the flow pipe, flow temperature sensor de- fective Flow/return NTC temperature difference too great → flow and/or return tem- F.72 Fault: Deviation in the water pressure sensor/return temperature sensor...

  • Page 41: E Wiring Diagrams

    Appendix Wiring diagrams Wiring diagram Applicability: VUW 246/7-2 (H-GB), VUW 286/7-2 (H-GB) Burner off RT 24V X106 eBUS – Burner 24V= 230V~ 230Vac Main PCB Gas valve Interface PCB Diverter valve Safety thermostat for underfloor heating Pressure sensor 24 V DC room thermostat Volume flow sensor Bus connection (digital room thermostat/controller) External ignition device...

  • Page 42: Wiring Diagram

    Appendix Wiring diagram Applicability: VUW 346/7-2 (H-GB) Burner off RT 24V X106 eBUS – Burner 24V= 230V~ RT 230Vac 230Vac Main PCB Gas valve Interface PCB Diverter valve Safety thermostat for underfloor heating Pressure sensor 24 V DC room thermostat Mass flow- Bus connection (digital room thermostat/controller) External ignition device...

  • Page 43: F Inspection And Maintenance Work - Overview

    Appendix Inspection and maintenance work – Overview The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na- tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of the intervals listed in the table.

  • Page 44: G Opening In The Flue Pipe

    Appendix Opening in the flue pipe D, E Positioning of the opening of a fan-supported flue gas pipe Minimum dimen- Installation site sions Directly below an opening, air bricks, opening windows, etc., that can be opened. 300 mm Above an opening, air bricks, opening windows, etc., that can be opened. 300 mm Horizontally to an opening, air bricks, opening windows, etc., that can be opened.

  • Page 45: Horizontal Terminal Positioning

    Appendix 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.

  • Page 46: H Commissioning Checklist

    Appendix Commissioning Checklist Benchmark Commissioning and Servicing Section It is a requirement that the boiler is installed and commissioned to the completed in full. www.centralheating.co.uk © Heating and Hotwater Industry Council (HHIC) Installation and maintenance instructions ecoTEC sustain 0020253094_01...
  • Page 47 Appendix GAS BOILER SYSTEM COMMISSIONING CHECKLIST 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. CONTROLS Optimum start control Fitted...
  • Page 48 Appendix SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider SERVICE 01 SERVICE 02 ² % ² % ² % ² % SERVICE 03 SERVICE 04 ²...
  • Page 49 Appendix PRIOR TO CO AND COMBUSTION RATIO CHECK NOTE The boiler manufacturer’s installation instructions should have been followed, gas type verified and gas THE AIR GAS RATIO VALVE IS FACTORY supply pressure/rate checked as required prior to commissioning. SET AND MUST NOT BE ADJUSTED As part of the installation process, especially where a flue has been fitted by persons other than the DURING COMMISSIONING UNLESS THIS boiler installer, visually check the integrity of the whole flue system to confirm that all components are...

  • Page 50: I Technical Data

    Appendix Technical data Technical data – Heating VUW 246/7-2 (H- VUW 286/7-2 (H- VUW 346/7-2 (H- 75 ℃ 75 ℃ 75 ℃ Maximum heating flow temperature (default setting – D.71) 30 … 80 ℃ 30 … 80 ℃ 30 … 80 ℃ Range for the heating flow temperat- ure control Safety discharge of expansion relief...
  • Page 51 Appendix Technical data – Domestic hot water VUW 246/7-2 (H- VUW 286/7-2 (H- VUW 346/7-2 (H- Minimum water flow 1.7 l/min 1.7 l/min 1.7 l/min Specific flow rate (D) (ΔT = 30 K) in 11.5 l/min 13.5 l/min 16.5 l/min accordance with EN 13203 Specific flow rate (ΔT = 35 K) 9.9 l/min...
  • Page 52 Appendix Technical data – Electrics VUW 246/7-2 (H- VUW 286/7-2 (H- VUW 346/7-2 (H- – – – Electric connection 230 V 230 V 230 V – – – 50 Hz 50 Hz 50 Hz Built-in fuse (slow-blow) T2/2A,250V T2/2A,250V T2/2A,250V Max.

  • Page 53: Index

    Index Index Fan, replacing..............26 Fault codes................25 60/100 mm diameter unit connection piece with offset, Fault symbol ................ 17 installing ................14 Filling Heating installation ............19 80/125 mm diameter unit connection piece, installing ..14 Filter in the cold water inlet, cleaning ........32 Flow rate-pressure curves...........
  • Page 54 Index Regulations ................6 Removing, compact thermal module........30 Repair work, completing............28 Repair work, preparing ..........25, 30 Replacing the burner ............25 Replacing the main PCB ............. 27 Replacing the PCB for the user interface ......27 Replacing, fan ..............26 Replacing, gas valve ............
  • Page 56 0020253094_01 0020253094_01 01.03.2017 Supplier Vaillant Ltd. Nottingham Road Belper Derbyshire DE56 1JT Telephone 0330 100 3461 info@vaillant.co.uk www.vaillant.co.uk © These instructions, or parts thereof, are protected by copyright and may be reproduced or distributed only with the manufacturer's written consent. We reserve the right to make technical changes.

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