Table of Contents
ecoFIT pure
412 - 435
en Installation and maintenance instructions
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Summary of Contents for Vaillant ecoFIT pure Series

  • Page 1 ecoFIT pure 412 - 435 en Installation and maintenance instructions...
  • Page 2: Table Of Contents

    Installation and maintenance Filling the condensate trap ........29 Switching on the product ........29 instructions Flushing the heating installation for the first time ("cold") ............29 Contents Filling the heating installation ......29 Checking the gas setting ........29 Safety ..............
  • Page 3: Safety

    Safety Qualification The person carrying out the work described Intended use here must have completed professional train- The product is intended as a heat generator ing. The competent person must demon- for open and sealed heating installations and strably have all of the knowledge, skills and for domestic hot water generation.
  • Page 4 ▶ Do not use any electrical switches, mains To prevent electric shocks, proceed as fol- plugs, doorbells, telephones or other com- lows before working on the product: munication systems in the building. ▶ Disconnect the product from the power ▶ Close the emergency control valve or the supply by switching off all power supplies main isolator.
  • Page 5: Regulations (Directives, Laws, Standards)

    List of relevant standards for Great Britain and Ireland ▶ Observe the national regulations, stand- ards, directives, ordinances and laws. You can find a list of relevant standards at: https://www.vaillant.co.uk/standards 0020230535_07 ecoFIT pure Installation and maintenance instructions...
  • Page 6: Guarantee And Customer Service

    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...
  • Page 7: Technical Data

    Technical data Technical data – General VU 126/6-3 OV (H-GB) VU 156/6-3 OV (H-GB) VU 186/6-3 OV (H-GB) Gas category Diameter of the gas pipe 1/2 inch 1/2 inch 1/2 inch Diameter of the heating 3/4 inch 3/4 inch 3/4 inch connections Expansion relief valve con- 15 mm...
  • Page 8 VU 256/6-3 OV (H-GB) VU 306/6-3 OV (H-GB) VU 356/6-3 OV (H-GB) Gas category Diameter of the gas pipe 1/2 inch 1/2 inch 1/2 inch Diameter of the heating 3/4 inch 3/4 inch 3/4 inch connections Expansion relief valve con- 15 mm 15 mm 15 mm...
  • Page 9 VU 126/6-3 OV (H-GB) VU 156/6-3 OV (H-GB) VU 186/6-3 OV (H-GB) Effective output range (P) 4.7 to 12.8 kW 4.7 to 15.9 kW 5.2 to 19.1 kW at 50/30 °C Effective output range (P) 4.5 to 12.3 kW 4.5 to 15.2 kW 5.0 to 18.3 kW at 80/60 °C Domestic hot water heat...
  • Page 10 VU 256/6-3 OV (H-GB) VU 306/6-3 OV (H-GB) VU 356/6-3 OV (H-GB) Nominal water flow 729 l/h 876 l/h 1,023 l/h (ΔT = 30 K) Approximate value for the 2.55 l/h 3.06 l/h 3.65 l/h condensate volume (pH value between 3.5 and 4.0) at 50/30 °C Technical data –...
  • Page 11: Notes On The Documentation

    NOx class for the product Hot Water Association Code (DSN) Specific product code Vaillant is a full member of the Hot Water Association and promotes the scheme in association with its cylinder range. Read the instructions. Details are available on the web site www.vaillant.co.uk GC no.
  • Page 12: Functional Elements

    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. 5.5.2 Overheating Safety The boiler software is designed to recognise the potential for an overheat lockout and will shutdown before this happens.
  • Page 13: Set-Up

    Set-up Dimensions Checking the scope of delivery ▶ Check that the scope of delivery is complete and intact. 6.1.1 Scope of delivery Num- Designation Heat generator Unit mounting bracket 183,5 Flue adapter Gas stopcock 33,5 Gas pipe 133,5 Condensate discharge hose Mounting template Enclosed documentation Condensate discharge...
  • Page 14: Minimum Clearances

    Minimum clearances 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.
  • Page 15 6.5.2 Position of the air/flue terminal 6.5.2.1 Positioning the terminal of a fan-supported flue system Dimen- Installation site sions Adjacent to a boundary. 300 mm The dimension below eaves, balconies and car ports can be reduced to this value, as long as the flue terminal is 25 mm extended to clear any overhang.
  • Page 16 Dimen- Installation site sions Below eaves. 200 mm Below gutters, pipe and drains. 75 mm The dimension below eaves, balconies and car ports can be reduced to this value, as long as the flue terminal is 25 mm extended to clear any overhang. External flue joints must be sealed with suitable silicon sealant. Above adjacent ground or balcony.
  • Page 17 6.5.3.3 Vertical Concentric Flue ⌀ 60/100 mm or 6.5.3 Flue Configuration Description ⌀ 80/125 mm (C33 type installation) 6.5.3.1 Horizontal Concentric Flue ⌀ 60/100 mm or ⌀ 80/125 mm (C13 type installation) Gasket (fitted) Consult the separate installation manual for air/flue gas sys- Note tems supplied with your appliance for all possibilities and as- If the terminal is at less than 1.80 m from the...
  • Page 18: Using The Mounting Template

    Removing/installing the front casing Boiler Final storey Inspection hatch Ground floor 6.8.1 Removing the front casing Note The flue connecting from the appliance to the flue system must be supplied from the manufacturer of the boiler. C43 flue systems must not be a 'pressurised sys- tem' but act under natural draught principles.
  • Page 19 6.9.2 Installing the side section ▶ Refit the components in the reverse order. 0020230535_07 ecoFIT pure Installation and maintenance instructions...
  • Page 20: Installation

    – Installation The flow rate specified in the technical data is reached. Preparing for installation Heating water supply in the open heating ▶ Make sure that the existing gas meter and the pipelines system are capable of passing the rate of gas supply required. ▶...
  • Page 21: Heating Water Supply In The Sealed Heating System

    Heating water supply in the sealed heating Note system A higher initial design pressure requires a larger volume expansion vessel. SUPPLY PIPE In GB, guidance on vessel sizing is also given in the cur- rent issue of BS 5449 and BS 7074 Part 1. In IE refer to the current edition of I.S.
  • Page 22: Gas Connection

    ▶ Gas connection 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. You can find further information in specification "BS 6798" for installing and maintaining gas-fired boilers with a nominal heat input below 70 kW.
  • Page 23 7.8.1.4 Internal termination into combined sink Open end of pipe direct into gulley below ground level but above water level waste Susceptible to siphonage, must terminate in a gulley 7.8.1.7 External termination into rain water down pipe 100mm ≥ 3 m Ø22mm Ø32mm ≤...
  • Page 24: Flue Installation

    Flue installation 7.10.2 Cable route 7.9.1 Installing and connecting the air/flue pipe You can find out which air/flue pipes may be used by consulting the enclosed set-up instructions for the air/flue system. Observe the information on positioning the air/flue ter- minal.
  • Page 25 7.10.4 Establishing the power supply 230V~ Carry out the wiring. (→ Page 24) 10. Close the electronics box. Observe all valid regulations. 11. Make sure that access to the power supply is always Ensure that the nominal mains voltage is 230 V. available and is not covered or blocked.
  • Page 26 ▶ Remove the bridge from the 24V=RT plug. Condition: 230 V 3-wire connection ▶ Connect the boiler only using the set with article number 0020244337 (Installation Kit, 3-wire, Vaillant). – When connecting, observe the instructions for the set. ▶ Connect the control to the main plug X1.
  • Page 27: Operation

    Operation Live Monitor (status codes) Menu → Live monitor Operating concept Status codes in the display provide information on the pro- The operating concept and the display and setting facilities duct's current operating status. of the operator level are described in the operating instruc- Status codes –...
  • Page 28: Start-Up

    Start-up Total Water hardness at specific system volume heating > 20 l/kW output ≤ 20 l/kW Carrying out the initial start-up > 50 l/kW ≤ 50 l/kW Initial start-up must be carried out by a customer service mol/ mol/ mol/ technician or an authorised competent person using the CaCO₃...
  • Page 29: Filling The Condensate Trap

    Additives for frost protection intended to remain Flushing the heating installation for the first permanently in the installation time ("cold") – Adey MC ZERO Note – Fernox Antifreeze Alphi 11 The complete heating system must be flushed – Sentinel X 500 at least twice: Once with cold water and once ▶...
  • Page 30 ▶ Ensure that all other gas appliances in the property are Condition: Gas flow pressure not in the permissible range turned off. ▶ Measure the gas flow rate at the gas meter. Caution. ▶ Compare the measured values with the corresponding Risk of material damage and operating values in the table.
  • Page 31 9.10 Checking the heating mode Activate the heating mode on the user interface. Turn all thermostatic valves on the radiators until they are fully open. Allow the product to operate for at least 15 minutes. Purge the heating installation. Call up the Live Monitor. –...
  • Page 32: 11 Handing Over To The End User

    Set maximum burner anti-cycling time Flow [min] (target) [°C] 10.1.2 Resetting the remaining burner anti-cycling time ▶ Press the reset button. 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.
  • Page 33 12 Inspection and maintenance 12.5 Setting the CO₂ content Condition: CO₂ content needs adjustment 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...
  • Page 34 Remove the air intake pipe (1). Remove the plugs from the gas valve assembly. Remove the gas-air mixture unit . Remove both burner seals (5) from the burner hood. 10. Remove the burner (4). 12.7 Cleaning the heat exchanger Check the heat exchanger for damage and dirt. If required, clean and replace the heat exchanger.
  • Page 35 12.12 Completing inspection and maintenance Carefully remove the electrode from the combustion chamber. work Check that the electrode ends (4) are undamaged. Check the gas connection pressure (gas flow pressure). Check the electrode distance. (→ Page 30) – Clearance for the ignition electrodes: 3.5 to 4.5 mm Check the CO₂...
  • Page 36 13.4.1 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.
  • Page 37 Dispose of the packaging correctly. ▶ Observe all relevant regulations. ▶ For detailed information refer to www.vaillant.co.uk. Open the electronics box. (→ Page 24) Pull all of the plugs out from the PCB. Undo the clips on the PCB. Remove the PCB.
  • Page 38 Appendix Inspection and maintenance work 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. Each time inspection and maintenance work is carried out, carry out the required preparatory and com- pletion work.
  • Page 39: B Overview Of Diagnostics Codes

    Maintenance work Interval Reassemble the product After each time maintenance work is carried out Opening the service valves Annually Fill the product/heating installation to the filling pressure specified for the Annually system Connect the product to the electrical installation Annually Run the test operation on the product/heating installation including hot Annually water generation (if available) and, if required, purge the product/heating...
  • Page 40 Setting level Values Default set- Unit Increment, select, explanation Own setting ting Min. Max. – – d.24 Status of the pressure off = Not switched switch adjustable on = Switched – – d.25 Status of the requirement Current value off = Function deactivated to reheat the cylinder or for adjustable on = Function activated...
  • Page 41 Setting level Values Default set- Unit Increment, select, explanation Own setting ting Min. Max. – – – d.66 Activation of the warm off = Function deactivated Adjustable start function for domestic hot on = Function activated water – – d.67 Remaining burner anti- Current value cycling time (setting under adjustable...
  • Page 42: C Status Codes - Overview

    Status codes – Overview Status code Meaning Displays in heating mode S. 0 Heating mode: No requirement S.01 Heating mode: Fan prerun S.02 Heating mode: Pump prerun S.03 Heating mode: Burner ignition S.04 Heating mode: Burner on S.05 Heating mode: Pump/fan overrun S.06 Heating mode: Fan overrun S.07...
  • Page 43: D Overview Of Fault Codes

    Overview of fault codes Code Meaning Cause F.00 Flow temperature sensor interruption NTC plug not plugged in or has come loose, multiple plug on the PCB not plugged in correctly, interruption in cable harness, NTC defective F.01 Return temperature sensor interruption NTC plug not plugged in or has come loose, multiple plug on the PCB not plugged in correctly, interruption in cable harness, NTC defective F.10...
  • Page 44 Code Meaning Cause F.75 Fault: No pressure change detection when start- Water pressure sensor and/or pump defective, air in the heating installa- ing pump tion, insufficient water in the product; check adjustable bypass, connect external expansion vessel to the return F.76 Overheating protection on primary heat ex- Cable or cable connections for safety fuse in primary heat exchanger or...
  • Page 45: E Wiring Diagram

    Wiring diagram Burner off X106 eBUS – Burner 24V= 230V~ Main PCB Gas valve assembly Interface PCB Heating pump Control system Monitoring electrode Temperature sensor on the heating flow Room thermostat Temperature sensor on the heating return Main power supply and connection for 230 V control Ignition electrode 0020230535_07 ecoFIT pure Installation and maintenance instructions...
  • Page 46: F Wiring Diagram, 30 Kw

    Wiring diagram, 30 kW Burner off X106 eBUS – Burner 24V= 230V~ Main PCB Gas valve assembly Interface PCB Heating pump Control system Monitoring electrode Temperature sensor on the heating flow Room thermostat Temperature sensor on the heating return Main power supply and connection for 230 V control Ignition electrode Installation and maintenance instructions ecoFIT pure 0020230535_07...
  • Page 47: G Commissioning Checklist

    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.
  • Page 48 GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Gas Safe registration number: Company name: Telephone number: Company email: Company address: Commissioning date: Heating and hot water system complies with the appropriate Building Regulations? Time, temperature control and boiler interlock provided for central heating and hot water Boiler Plus requirements (tick the appropriate box(s)) Weather compensation...
  • Page 49 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 Date: SERVICE/INTERIM WORK ON BOILER...
  • Page 50 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 Date: SERVICE/INTERIM WORK ON BOILER...
  • Page 51: H Commissioning Flow Chart

    Commissioning Flow Chart 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...
  • Page 52: Index

    Index Handing over to the end user ..........32 Heat exchanger, cleaning............ 34 Air intake pipe, removing............. 33 Heat exchanger, replacing ..........36 Air/flue pipe, horizontal wall duct......... 17 Heating flow, connecting ............. 21 Air/flue pipe, installing ............24 Heating installation, filling............ 29 Air/flue pipe, type C13 ............
  • Page 56 Supplier Vaillant Ltd. Nottingham Road Belper Derbyshire DE56 1JT Telephone 0330 100 3461 [email protected] www.vaillant.co.uk 0020230535_07 Publisher/manufacturer Vaillant GmbH Berghauser Str. 40 D-42859 Remscheid Tel. +492191 18 0 Fax +492191 18 2810 [email protected] 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.

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