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Vaillant ecoTEC plus Instructions For Installation And Servicing
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Vaillant ecoTEC plus Instructions For Installation And Servicing

Vaillant ecoTEC plus Instructions For Installation And Servicing

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Instructions for installation and servicing
Models covered by these instructions
415
418
428
438
For the installer
ecoTEC plus
Wall hung open vent condensing boiler
GB
Contents
1
Introduction
(41-044-53)
ecoTEC plus 415
(41-044-54)
ecoTEC plus 418
(41-044-55)
ecoTEC plus 428
(41-044-57)
ecoTEC plus 438

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Summary of Contents for Vaillant ecoTEC plus

  • Page 1 Instructions for installation and servicing Models covered by these instructions (41-044-53) ecoTEC plus 415 (41-044-54) ecoTEC plus 418 (41-044-55) ecoTEC plus 428 (41-044-57) ecoTEC plus 438 For the installer ecoTEC plus Wall hung open vent condensing boiler Contents Introduction...
  • Page 2 Notes on the documentation 1.1.1 Other instructions supplied with this appliance 1.1.3 Safety instructions and symbols Validity of the manual ecoTEC plus boilers Intended use General information 1.5.1 Gas category 1.5.2 Gas safety (installation and use) regulations 1.5.3 Gas testing and certification 1.5.4...
  • Page 3 1.5.19 Maintenance and servicing 1.5.20 Technical data Statutory requirements Regulations, rules and guidelines CE label Benchmark 1.10 Gas council numbers Boiler specifications Technical data 2.1.2 Dimensions 2.1.3 Installation General requirements Preliminary remarks for room sealed appliances Related documents Installation site Gas supply Flue options 3.5.1...
  • Page 4 3.11 Draining tap 3.12 Safety valve 3.13 Bypass 3.14 Pump specification 3.15 Cleanser and inhibitor 3.16 Water pressure loss 3.17 Open vented heating system 3.18 Sealed water Systems 3.18.1 Safety valve 3.18.2 Expansion vessel 3.18.3 Pressure gauge 3.18.4 Water make up 3.18.5 Filling a sealed water system Boiler installation sequence...
  • Page 5 4.4.5 External electrical controls 4.4.6 Connection details for external time switches and boiler terminal strip 4.4.7 Vaillant optional plug in timer accessories 4.4.8 Connection details using the VR 65 control centre Commissioning (Part I) Preliminaries - all systems 5.1.1 Gas supply 5.1.2...
  • Page 6 Domestic hot water (If optional VR65, uniSTOR cylinder and Vaillant control are installed) Pump exercise programme Final flush of the heating system (hot) Hand over to the user Inspection and maintenanc Inspection and maintenance intervals 8.1.1 General inspection and maintenance instructions 8.1.2...

  • Page 7: Notes On The Documentation

    Replacing the condense trap and siphonic drain 11.7 Replacing electronics and display Recycling and disposal 12.1 Appliance 12.2 Packaging Factory guarantee and Vaillant service 13.1 Factory guarantee 13.2 Vaillant service Appendix 1 Introduction 1.1 Notes on the documentation. To ensure clarity of information in instructions a new European standard of advice and symbols is being introduced.
  • Page 8 If, after reading these instructions, you have any questions on the operation of the boiler, please contact either your installer or Vaillant Technical Department. 1.1.2 Retention of documents Please retain this literature and all related documents so that they are available whenever they are required.

  • Page 9: Ecotec Plus Boilers

    The central heating water temperature can be adjusted on the boiler. The domestic hot water can only be adjusted on the boiler if it is installed with a Vaillant uniSTOR unvented cylinder and relevant controls. Once the controls are set the boiler operates automatically.

  • Page 10: General Information

    The Benchmark logbook should be completed by the installer and/or commissioning engineer and handed to the user. 1.5.1 Gas category The boiler is supplied factory set for use on Natural Gas (G20). The ecoTEC plus boilers can be field adjusted for use on LPG (propane G31), see section 7 for instructions or contact Vaillant Service, 0870 6060 777.
  • Page 11 If you do suffer irritation to the eyes or severe irritation to the skin seek medical attention. 1.5.6 Spare parts Only original Vaillant spare parts may be used. 1.5.7 Manual handling guidance During the appliance installation (and any subsequent re-placement of the heat exchanger) it will be necessary to em-ploy caution.
  • Page 12 CAUTION: With regards to the Manual Handling Opera-tions, 1992 Regulations, the following lift oper-ation exceeds the recommended weight for a one man lift. Employers and installers should refer to the HSE web site for full advice and manual Han-dling assessment charts (MAC) tool. WARNING: Smell of gas.
  • Page 13 This boiler must be earthed. 1.5.12 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.
  • Page 14 Do not remove or adjust the casing in any way, as incorrect-fitting may result in incorrect operation or failure to operate at all. 1.5.16 Condensate drain The condensate drain must not be modified or blocked. 1.5.17 Pluming from flue terminal All condensing boilers produce a plume of water vapour from the flue terminal.

  • Page 15: Statutory Requirements

    All ecoTEC plus boilers: Class ‘A’. The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated has been certified by B.S.I. 1.6 Statutory requirements The appliance is suitable only for installation in GB and IE and should be installed in accordance with the rules in force.

  • Page 16: Regulations, Rules And Guidelines

    It is important that no alteration is made to the boiler, without permission, in writing, from Vaillant. Any alteration that is not approved by Vaillant, could invalidate the warranty and could also infringe the current issue of the Statutory Requirements.

  • Page 17: Boiler Specifications

    Appliance Gas council numbers ecoTEC plus 415 41-044-53 ecoTEC plus 418 41-044-54 ecoTEC plus 428 41-044-55 ecoTEC plus 438 41-044-57 2 Boiler specifications 2.1 Technical data Description Unit ecoTEC ecoTEC ecoTEC ecoTEC plus 415 plus 418 plus 428 plus 438 Maximum CH heat input 15.3...
  • Page 18 Minimum gas rate 0.53 0.53 0.56 0.71 Burner % CO (Case on) 9.3 + 0.2 - 9.3 + 0.2 - 9.3 + 0.2 - 9.0 + 0.2 - Gas connection (compression) Water connections (compression) Condensate drain 19 min. 19 min. 19 min.
  • Page 20 2.1.3 Installation Fig. 2.2 Function elements of boiler...

  • Page 22: General Requirements

    3 General requirements 3.1 Preliminary remarks for room sealed appliances This appliance must only be installed and commissioned by a suitably competent person. Please check with your installer that he is able to carryout all the necessary works including official notification of the works to the relevant body upon completion. 3.2 Related documents The installation of the appliance and any associated hot water system must be in accordance with (but not limit-ed to) the following;...

  • Page 23: Installation Site

    Part 2 Selection of equipment. Part 3 Installation, commissioning and maintenance. BS. 4814: Specification for: Expansion vessels using an internal diaphragm, for sealed hot water heating systems. BS. 5440: Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70 kW net (1st, 2nd and 3rd family gases). Part 1 Specification for installation of flues.

  • Page 24: Gas Supply

    BS 6891. WARNING: Vaillant appliances are certified only for use with genuine Vaillant flue pipes. Only use genuine Vaillant flue pipes. Malfunctions can occur if you use other accessories. These may result in damage and injury.

  • Page 25: Flue Options

    You will find a list of genuine flue pipes in the Vaillant installation manual for flue pipes. The CE mark is valid only if the appliance is operated with Vaillant flue pipes. 3.5 Flue options There are various flue systems to choose from, as follows: 60/100 standard horizontal air/flue duct, see 3.1.
  • Page 26 Fig. 3.3 Art. No. 303900 Fig. 3.4 Art. No. 303209 Fig. 3.5 Vertical Flue System Art. No. 303200...
  • Page 27 3.5.1 Flue termination The following details refer to both flue systems. 1. The terminal must be located where the combustible substances can escape freely at all times. 2. A plume of water vapour will sometimes be visible from the flue terminal. Positions where this could be a nuisance should be avoided.
  • Page 28 Table 3.1 Flue terminal position for a fan assisted concentric flue Terminal position Directly below an opening, above an opening or horizontal to an opening, air brick, opening window, etc. Below gutters, soil pipes or drain pipes Below eaves Below balconies From vertical drain pipes and soil pipes From internal or external corners Above ground, roof or balcony...
  • Page 29 The flue assembly shall be so placed or shielded as to prevent ignition or damage to any part of the building. NOTE: In addition, the terminal should not be located closer than 150 mm from a wallopening provided for e.g. a window. Boundary flue terminations must as a minimum comply with Building regu-lation part „J“...
  • Page 30 0.35 bar above the safety valve setting. 3.8.1 Unvented hot water cylinder The ecoTEC plus can be connected to an unvented hot water cylinder. Vaillant offer a range of cylinders called uniSTOR with capacities from 125 litres to 310 litres. All unvented domestic hot...
  • Page 31 It is recommended that a programmer and room thermostat control the boiler. Vaillant have a range of optional easy fit controls available. Thermostatic radiator valves must be installed, however they must not be fitted in a room where the room thermostat is located.
  • Page 32 Vaillant appliances has been detected with proper use of the following products. When using additives, follow the additive manufactur-er‘s instructions without exception. Vaillant accepts no liability for the compatibility of any additive or its effectiveness in the entire heating system. Additives for cleaning purposes (subsequent flushing required) ●...
  • Page 33 You must treat the heating water if the total volume of filling and top-up water ex-ceeds thrice the nominal volume of the heating sys-tem over the service life of the system if the limits given in the following tables are not ad-hered to. Table 3.2 Guidelines for the heating water: Water hardness Total heating Total hardness at 20...

  • Page 34: Water Pressure Loss

    Frost and corrosion protection agents may cause changes in the seals, noises during heat-ing and possibly subsequent damage. Do not use any unsuitable frost or corrosion protection agents. 3.16 Water pressure loss Fig. 3.8.1 Pressure loss ecoTEC plus 415...
  • Page 35 Fig. 3.8.2 Pressure loss ecoTEC plus 418...
  • Page 36 Fig. 3.8.3 Pressure loss ecoTEC plus 428...
  • Page 37 Fig. 3.8.4 Pressure loss ecoTEC plus 438...

  • Page 38: Open Vented Heating System

    3.17 Open vented heating system The boiler must be supplied from an unrestricted water supply taken from a feed and expansion cistern situated at a maximum height of 27 metres (90ft) above the boiler. The cold feed must be 15mm minimum size. The vent must rise continuously and be unrestricted.

  • Page 39: Sealed Water Systems

    BS5449, BS6759, BS6798 and BS7074 Part 1 and 2. For IE your attention is drawn to the current edition of IS 813. It is highly recommend to use the Vaillant Sealed System Kit Article; 020053207 This includes all necessary compo-nents and is included in your Vaillant warranty.
  • Page 40 The safety valve discharge pipe must be routed to outside the building, must not discharge above an entrance or window or any type of public access area, be clear of any electrical fittings and positioned so that any discharge can be seen. 3.18.2 Expansion vessel A diaphragm type expansion vessel, conforming to the current issue of BS4814 (see also BS7074 Part 1 and 2).

  • Page 41: Boiler Installation Sequence

    4 Boiler installation sequence 4.1 Boiler location NOTE: This boiler is not suitable for outdoor installation This boiler may be installed in any room, although particular attention is drawn to the installation of a boiler in a room containing a bath or shower where reference must be made to the relevant requirements.
  • Page 42 current ETCI rules. The boiler must be mounted on a flat wall, which is sufficiently robust to take its total weight, see boiler specifications 2.1. 4.1.2 Clearances The boiler should be positioned so that at least the minimum operational and servicing clearances are provided, see 4.1.
  • Page 43 Additional clearances may be beneficial around the boiler for installation and servicing.
  • Page 44 If in doubt seek advice from the local gas under-taking or Vaillant. 4.1.4 Contents included with delivery The Vaillant ecoTEC plus is delivered pre-mounted in a package unit. Check that all the parts have been delivered intact (see fig.

  • Page 45: Fitting The Boiler Hanging Bracket

    Vaillant appliances are certified only for use with genuine Vaillant flue pipes. Only use genuine Vaillant flue pipes. Malfunctions can occur if you use other accessories. These may result in damage and injury. You will find a list of genuine flue pipes in the Vaillant installation manual for flue pipes.
  • Page 46 Reposition the wall template over the flue hole ensuring the template is vertical and mark the position of the fixing holes for the hanging bracket, see 4.3. Mark and drill the fixing holes and secure the hanging bracket. Fix the hanging bracket to the wall using the screws supplied. Ensure the uppermost set of screw positions are used (it may be necessary to use additional or alternative fixings to ensure adequate support).
  • Page 47 WARNING: The gas connection may only be made by a competent person. The legal directives and the local regulations for gas supply companies must be observed. CAUTION: Ensure a stress-relief assembly of the gas pipes to avoid leakages! CAUTION: The gas regulating block may be tested for leakage only with a maximum pressure of 150 mbar! Higher testing pressures can damage the gas fitting.
  • Page 48 When making final connection to the boiler, if using soldered fittings, extra care should be taken to avoid damage to isolation valves through heat transfer. Before connection check the supply of local gas. NOTE: Ensure the gas supply pipe work is adequately sized so that a 20 mbar gas pressure is available at the boiler inlet at full flow rate.
  • Page 49 4.3.4 Water connections CAUTION: When making final connection to the boiler use the compression fittings supplied to avoid dam-age through heat transfer. Fig. 4.6 Water connections...
  • Page 50 Provision is made for the water connections to be made from above the boiler, see fig 4.6 (using the two 22mm compression couplers supplied). The position is shown on the wall template. Flush out the domestic hot water and the heating systems before connecting to the boiler. 4.3.5 Condensate trap and siphonic drain connection The condensate drain pipework must have a continuous-fall (45 mm per metre) and should whenever possible terminate at a suitable drain point within the heated en-velope of the building...

  • Page 51: Electrical Connections

    It is not necessary to provide air breaks or extra traps in the discharge pipe as there is already a 75mm high trap inside the boiler. Fitting an extra trap may cause the boiler siphon to work incorrectly. Refer to BS5546 or BS6798 for advice on disposal of boiler condensate. 1.
  • Page 52 CAUTION: This appliance must be wired in accordance with these instructions. Any fault arising from incorrect wiring cannot be put right under the terms of the Vaillant guarantee. WARNING: Mains connection terminals L and N remain live “unless isolated at the fused spur or electrical outlet supplying the boiler”.
  • Page 53 Opening the electronics box ● Unclip the bottom of the electronics box cover and hinge back to reveal the connection plugs. ● Feed the power supply flex into the appliance and the electronics box through the cable clamps provided. 4.4.2 Wiring system ●...
  • Page 54 Fig. 4.8.2 Mains supply and alternative pump switch live connection...
  • Page 55 Green/yellow (earth) wire – boiler terminal Earth sign Blue (neutral) wire – boiler terminal N Brown (live) wire – boiler terminal L CAUTION: Do not connect any mains 230V power to the connections 7-8-9 or BUS (+,-). NOTE: Ensure that the wires are securely fixed in the terminal block.
  • Page 56 • Refit the electronics box cover by pushing into place until it clips back into position. • Raise the electronics box. ● Check the electrical installation by carrying out short circuit, earth continuity and resistance to earth tests and a check for correct polarity. 4.4.3 Electrical board layout Fig.
  • Page 58 Fig. 4.10 Mains Supply Connection...

  • Page 60: Installation

    4.4.4 Controls Table 4.2 Vaillant controls (used in conjunction with the VR 65 accessory) Controls Article no. Installation VRT 392 Programmable Room 0020028509 Wall mounted Control VRT 392f RF Programmable Room 0020028514 Wall mounted Control VRC 470 Weather Compensator 0020108130...
  • Page 61 4.4.8 Connection details using the VR 65 and VR61 control centre The Control Centre VR 65 and VR 61 are eBUS system components. In a storage unit cylinder installation, they are responsible for the communication between the ecoTEC plus boiler and...

  • Page 62: Commissioning (Part I)

    NOTE: When using a VR61 an optional wiring harness plug is available from Vaillant technical (Tele-phone 01634 292 392) to allow easy connection of the domestic hot water demand direct to the boiler. If using in conjunction with Solar and a VR68 this plug is not required.
  • Page 63 NOTE: When replacing chassis panel ensure the bottom fits behind lip. Make sure that the system has been thoroughly flushed out with cold water, prior to filling the system refer to section 3.16 inhibitor cleaning. Refill the system with water, making sure that all the air is properly vented from the system and pump.
  • Page 64 Isolate the boiler from the mains electrical supply. The complete gas installation including the gas meter must be isolated, tested for soundness and purged in accordance with BS 6891, in IE the current edition of IS 813. The gas supply to the boiler can be purged by slackening the union connection on the gas service valve beneath the boiler, see 5.2.
  • Page 65 CAUTION: LPG: Do not proceed with the adjustment or attempt to put the unit into service if the inlet working pressure is lower than 34 mbar. CAUTION: Before operating the boiler check the type plate and ensure that the correct gas type appliance has been installed 5.1.2 Gas Pressure statement - Natual Gas CAUTION:...
  • Page 66 Maximum 23 mbar 20 mbar 415/418/428 Design (nominal) 21 mbar 18 mbar Minimum 19 mbar 16 mbar ecoTEC plus 438 Maximum 23 mbar 19.5 mbar Design (nominal) 21 mbar 17.5 mbar Minimum 19 mbar 15 mbar NOTE: In all instances the gas rate to the appliance shall be measured.
  • Page 67 ● To prepare the boiler for initial lighting first ensure that all external controls are calling for heat. ● For access open the front flap by pulling at the centre of the case strip. ● Turn on the power to the appliance whilst holding the + button - keep held until the P0 appears.
  • Page 68 This appliance is fitted with a fan. If the fan does not work properly, the appliance will switch itself off. The display shows the symbols and and the fault message “F.32”. NOTE: If contacting Vaillant Service Solutions please remember to quote the fault code, as this will help to pinpoint the fault. 5.1.6 Testing - gas The boiler is supplied ready adjusted and no further gas adjustments are necessary.

  • Page 69: Natural Gas To Lpg Conversion

    3.13 2.83 6 Natural gas to LPG conversion The ecoTEC plus is able to be field adjusted for use on LPG – propane G31 gas. To enable conversion the use of a flue gas analyser is necessary. CAUTION: After converting from natural gas to LPG, commission and check boiler function as described in commissioning section of the servicing and installation instructions.
  • Page 70 ● Turn the gas valve “A” throttle screw (Ref fig. 6.1) fully clockwise. ● Turn the “A” throttle screw back anti-clockwise the required number of turns as stated in table 9.1 for the boiler installed. ● Ensure the gas analyser is set to the correct fuel setting propane. To obtain conversion follow the procedure as listed below.
  • Page 71 Fig. 6.2 ecoTEC plus controls Table 6.1 LPG Settings Model...

  • Page 72: Functional Checks Commissioning (Part Ii)

    G31 % CO after 5mins at full load Throttle Maximum Case off Case on Adjustment CO/CO ratio ecoTEC plus 10.1+0.5-0.5 10.3+0.5-0.5 5 turns <0.0026 ecoTEC plus 10.1+0.0-1.0 10.3+0.0-1.0 5 turns <0.0026 ecoTEC plus 10.5+0.3-0.8 10.7+0.3-0.8 5 turns <0.0026 ecoTEC plus 9.8+0.2-0.8...
  • Page 73 As soon as a heat demand is received, the appliance runs through the status indicators “S. 1” to “S. 3”, until the appliance is running correctly in normal mode and the display shows “S. 4”. 7.3 Domestic hot water (If optional VR65, uniSTOR cylinder & Vaillant control are installed) ●...

  • Page 74: Handing Over To The User

    7.4 Pump exercise programme After a power cut or every 23 hour in frost protection mode the pump will run for one minute to prevent it from sticking. This will also occur during normal operating if there is no demand for more than 24 hours.

  • Page 75: Inspection And Maintenance Intervals

    If fitted to a sealed system ● Set the maximum radiator temperature control to the desired setting. ● Set the maximum hot water temperature control to the desired setting (If optional Vaillant accessories are fitted). ● Instruct the user in the safe and efficient operation of the boiler.
  • Page 76 This normally is done by cleaning, adjustment and, if necessary, replacing individual components that are subject to wear. You must carry out an annual inspec-tion of the Vaillant ecoTEC. It is possible to perform a quick, accurate inspection without removing components by carrying out the sim-ple visual checks indicated in table 8.2...
  • Page 77 Vaillant boiler and to prevent modifications to the approved se-ries status only genuine Vaillant spare parts must be used when carrying out inspection, maintenance and re-pair work. For an overview of the available original Vail-lant spare parts, contact the Vaillant sales office on 01634 292310.
  • Page 78 gas valve, conversion to or from Natural Gas/LPG as part of the service schedule or if incorrect combus-tion is suspected (see section 8.1.2 Maintenance Before commencing any servicing or maintenance work, carry out an initial inspection of the system as follows: ●...
  • Page 79 Carry out a general inspection of the boiler for dirt × × and dust and clean as necessary. Visually inspect the complete heat engine for its × × general condition and for signs of corrosion, sooting or other forms of damage. If damage is evident proceed to column 2.
  • Page 80 Check the condensate ducts in the boiler and clean × × if necessary. Install the compact thermal module. Caution: Use × new seals and nuts! Open the gas isolator cock, reconnect the boiler with × × the power mains and switch on the boiler. Perform a test operation of the boiler and heating ×...
  • Page 81 All routine servicing requirements can be achieved by the removal of the front casing, inner case and chassis panel only. ● Remove the two screws on the underside of the front casing and lift off. ● Remove the two screws on the front of inner case and lift off, see 8.1.
  • Page 82 Fig. 8.3 Flame picture 8.1.5 Spark electrode ● Disconnect the ignition lead and earth lead from the igniter unit and two securing screws at the spark electrode. ● Withdraw the spark electrode carefully from the combustion chamber, see 8.4.
  • Page 83 ● Inspect the tips for damage. ● Clean away any debris and check the spark gap is 3.5 -4.5 mm. ● Check the electrode gasket for signs of damage and replace if necessary. Fig. 8.4 Gas service cock 8.1.6 Removing the burner NOTE: If the functional checks did not indicate poor combustion then it is not necessary to service the burner.
  • Page 84 NOTE: Do not disconnect at the gas valve. Remove the two gas pipe bracket securing screws from underside of inner case, see 8.5. Drop down the electronics box into the service position. Remove the four screws from the chassis front, see 8.2.
  • Page 85 ● Disconnect the gas valve electrical plug at the gas valve. ● Disconnect the electrical leads from the fan. ● Remove the five combustion chamber burner door securing nuts, these should be discarded and replaced with the new nyloc nuts supplied in the burner door seal kit. ●...
  • Page 86 NOTE: If the burner has to be removed it will require a new gasket and nuts when refitted (Article No. 0020038670). NOTE: When replacing ensure that the sealing grommet, situated below the gas valve is correctly re-seated. 8.1.7 Combustion chamber and heat exchanger Fig.
  • Page 87 Remove loose debris from combustion chamber using a soft brush and vacuum cleaner. Carefully flush any remaining debris through the condensate trap (ensure the water is kept away from electrical components). 8.1.8 Condensate drain The condense drain does not normally need removing during servicing. To flush the condense drain carefully pour water into the heat exchanger and check that water flows freely to drain.
  • Page 88 8.1.10 Checking the expansion vessel (If fitted). NOTE: It is not necessary to perform this check every year a check every three years is sufficient. ● Release the pressure from the boiler. ● Remove valve cap from expansion vessel charge point. ●...

  • Page 89: Combustion Analysis

    Always perform the following checks after completing any maintenance task: ● Commission the appliance according to the relevant operating manual. ● Check the appliance for gas and water leaks. ● Check the air/flue gas system for leaks, check its fastening ●...
  • Page 90 ● Remove the front and inner cover. ● To correct combustion follow the procedure as listed below. ● Ensure that the gas supply pressure is correct (see table 5.1) ● The gas inlet working pressure can be checked at the pressure test point on the gas valve (fig 5.3).
  • Page 91 ecoTEC 9.1+0.2- 9.3+0.2- <0.0026 10.1+0.0- 10.3+0.0- 5 turns <0.0026 plus 418 ecoTEC 9.1+0.2- 9.3+0.2- <0.0026 10.5+0.3- 10.7+0.3- 5 turns <0.0026 plus 428 ecoTEC 8.8+0.2- 9.0+0.2- <0.0026 9.8+0.2-0 10.0+0.2- 8 turns <0.0026 plus 438 ● If required, using a screwdriver, adjust the “A” throt-tle to obtain correct value. (rotating anti-clockwise to increase).

  • Page 92: Troubleshooting

    (if fitted) are fully open. 5. Set the central heating temperature to maximum. 6. Set the domestic hot water temperature to maximum (Only if additional Vaillant accessories are fitted). 7. Check that all external controls are on and calling for heat (if no external controls are fitted, boiler terminals 3 and 4 must be linked).
  • Page 93 Fig. 10.1 Display of status codes Table 10.1 Status codes Display Meaning Heating mode (all models): S. 0 No heat demand S. 1 Fan running S. 2 Water pump running S. 3 Ignition sequence S. 4 Burner ignited S. 5 Fan and pump running S.
  • Page 94 Domestic hot water mode (when accessories are fitted) S.20 Warmstart demand S.21 Fan running S.22 Pump running S.23 Ignition sequence S.24 Burner ignited S.25 Fan and water pump running S.26 Fan over run S.27 Pump over run S.28 Anti cycling mode Charge hot water cylinder (when accessories are fitted): S.20 Warmstart demand...
  • Page 95 S.32 Heat exchanger antifreeze active, as fan speed variation is too high. Appliance is within the waiting time of the operation block function S.34 Anti frost mode active S.36 No heating demand from low voltage controls (clamp 7-8-9) S.41 Water pressure > 2,9 bar S.42 Response from accessory module or defective condensate pump is blocking burner operation...
  • Page 96 Second diagnostic level ● As described above in the first diagnostic level, scroll through the diagnostic number d.97. ● Change the displayed value to 17 (password) and press the “i” button. You are now in the second diagnostic level where all information from the first diagnostic level (see table 10.2) and the second diagnostic level (see table...
  • Page 97 d. 7 Warm start temperature target value in °C, 40 to 65°C in °C, 15°C for left (when accessories are fitted) Storage stop, then 40 to 70°C temperature target value (system boiler only) d. 8 External controls heat demand 0 = open (no heat request) 1 = closed (terminals 3-4) (heat request) d.
  • Page 98 Outside temperature (with weather Actual value in °C compensating Vaillant controller only) d.67 Remaining burner anti cycling time in min d.76 Appliance variant (device specific 00 to 99 number) d.90 Digital regulator status 1 = identified, 0 = unidentified (eBUS Address <=10)
  • Page 99 d.27 Switching accessory relay 1 in the 1 = Circulation pump (default) accessory module 2 = Ext. pump 3 = Storage charging pump 4 = Flue gas flap/extractor hood 5 = External gas valve 6 = External error message d.28 Switching accessory relay 2 in the 1 = Circulation pump accessory module...
  • Page 100 d.68 Unsuccessful ignitions in the first Quantity attempt d.69 Unsuccessful ignitions in the second Quantity attempt d.70 Set diverter valve position 0 = Normal mode (factory setting) 1 = Centre position 2 = permanent heating position d.71 Maximum setting of heater control knob Adjustment range in °C: 40 to 85 (Factory setting: 75) d.72...
  • Page 101 d.84 Maintenance indicator: Number of hours Adjustment range: 0 to 3000 h and “-” until the next maintenance for disabled Factory setting: “-” (300 corresponds to 3000 h) d.93 DSN appliance variant setting Adjustment range: 0 to 99 d.96 Factory setting 1 = Resetting adjustable parameters to factory setting 1) Five-digit numbers are saved with the diagnostics codes 80 to 83.
  • Page 102 F. 1 Return–NTC open circuit NTC broken, NTC cable broken, Defective connection at NTC, Defective connection at electronics F.10 Flow NTC short circuit NTC defective, short circuit in cable harness, cable/casing short cut F.11 Return NTC short circuit NTC defective, short circuit in cable harness, cable/casing short cut F.13 Tank NTC short circuit...
  • Page 103 F.29 Flame goes off during operation and ignition attempts failed Gas supply subsequent temporarily stopped, faulty earthing of appliance F.32 Fan speed variation Fan blocked, plug not inserted correctly on fan, hall sensor defective, fault in cable harness, electronics defective F.49 eBUS under voltage Short circuit on eBUS, overload on...

  • Page 104: Test Programs

    F.73 Water pressure sensor signal out of Spare part failure display and main range (too low) board interchanged at same time and device specific number not adjusted F.75 No pressure rise was detected on Water pressure sensor or/and pump turning on the pump defective Air in the heating system, quick bleeder defective Too little water in appliance;...

  • Page 105: Resetting Parameter To Factory Settings

    Display Meaning Bleeding test program. The heating circuit and hot water circuit (when accessories are fitted) is bled via the automatic air vent (the cap on the automatic air vent must be loosened). Test program where the appliance is operated in full load after successful ignition Test program where the appliance is operated with minimum gas volume (ignition gas volume) after successful ignition Not available...

  • Page 106: Replacing The Burner

    Each time the components are replaced, comply with the safety instructions below for your own safety and to avoid damage to the appliance! ● Put the appliance out of operation. NOTE: Before starting any maintenance work: Isolate the mains electricity supply by disconnecting the plug at the socket outlet (if there is only an isolating switch remove the fuse from the switch).

  • Page 107: Replacing The Heat Exchanger

    Fig. 11.1 Fan removal Check the gasket and replace if necessary. NOTE: The ecoTEC plus 428 and 438 fan is secured through an extension piece with two securing screws, check and replace any seals or gaskets if necessary. 11.5 Replacing the heat exchanger...

  • Page 108: Replacing The Condense Trap And Siphonic Drain

    For access refer to section 8.1.4. ● Remove the gas valve, fan and burner refer to the relevant parts of section 8.1.6. ● Drain the boiler. ● Remove the clip securing the clear condense pipe to heat exchanger. ● Pull to remove clamps (two at the top and one at the bottom) to remove the heat exchanger, see 11.2.
  • Page 109 ● Remove the clips securing the flexible tubes to the adapter by twisting the clips slightly to disengage the clip jaws from each other. ● Remove flexible tubes from adapter. ● Lift off the adapter. ● Remove the drain connection downstream of the condense trap. ●...

  • Page 110: Replacing Electronics And Display

    ● In the second diagnostic level, under the diagnostic number “d.93” enter the number of appliance variant according to table 11.1 (see section 10.1.2). Table 11.1 Device specific numbers Appliance Device specific number ecoTEC plus 415 ecoTEC plus 418 ecoTEC plus 428 ecoTEC plus 438...

  • Page 111: Recycling And Disposal

    12.1 Appliance The Vaillant ecoTEC plus consists largely (92 %) of metal components designed for eventual recycling by incorporation into the smelting process of a steelworks. This gives these parts virtually unlimited scope for subsequent re-use. All plastic materials are duly identified to facilitate sorting and separation when the time comes to recycle the unit.

  • Page 112: Vaillant Service

    Vaillant scheme. Immediate help If your Vaillant boiler develops a fault your first action should be to contact your installer, as his professional assessment is needed under the terms of our Guaran-tee. If you are unable to contact your installer, phone Vaillant Service Solutions: 0870 6060 777 13.2 Vaillant service...

This manual is also suitable for:

Ecotec plus 415Ecotec plus 418Ecotec plus 428Ecotec plus 43841-044-5341-044-54 ... Show all