Contents Contents Adapting the unit to the heating installation............26 Activating diagnostics codes ....... 26 Safety ..............3 Adapting the heating settings ......26 Action-related warnings ......... 3 Setting the maintenance interval ......28 Intended use ............3 Handing over to the end user ......28 General safety information ........
Safety 1 – compliance with all inspection and main- Safety tenance conditions listed in the instruc- Action-related warnings tions. Classification of action-related warnings Intended use also covers installation in ac- The action-related warnings are classified in cordance with the IP code. accordance with the severity of the possible Any other use that is not specified in these in- danger using the following warning signs and...
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1 Safety ▶ If possible, close the gas isolator cock on ▶ Install the necessary safety devices in the the product. system. ▶ Warn other occupants in the building by ▶ Observe the applicable national and inter- yelling or banging on doors or walls. national laws, standards and guidelines.
Safety 1 ▶ Ensure that the combustion air is not 1.3.11 Risk of poisoning and burns caused by escaping hot flue gases routed through chimneys which have previously been used with floor-standing ▶ Only operate the product if the air/flue pipe oil-fired boilers, or with other boilers, has been completely installed.
2 Notes on the documentation Notes on the documentation Product design Observing other applicable documents 16 17 18 ▶ You must observe all the operating and installation in- structions included with the system components. Storing documents ▶ Pass these instructions and all other applicable docu- ments on to the system operator.
Set-up 4 Set-up Information on the Meaning data plate Unpacking the product Serial number For quality control purposes; 3rd and 4th digits = year of production Remove the product from its box. For quality control purposes; 5th and 6th Remove the wedge and protective film from all of the digits = week of production product's components.
4 Set-up Dimensions Gas pressure connec- Drain for the dynamic tion air separation system Connection for the air/flue pipe Dimension A VC 406/5-5 (E-DE) 405 mm VC 406/5-5 (LL-DE) 405 mm VC 476/5-5 (E-DE) 405 mm VC 476/5-5 (LL-DE) 405 mm VC 636/5-5 (E-DE) 473 mm VC 636/5-5 (LL-DE)
Set-up 4 Wall-mounting the product Pull the front casing forwards at the bottom edge (C). Lift the front casing upwards from the bracket (D). 4.8.2 Installing the front casing Check the load-bearing capacity of the wall. Note the total weight of the product. Only use fixing material that is permitted for the wall.
5 Installation Installation Removing/installing the side section 4.9.1 Removing the side section Sample system installations ▶ Caution. The basic system diagrams are examples of how to set Risk of material damage caused by mech- up systems. ▶ anical deformation. Choose the basic system diagram you want to use to set up your installation.
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Installation 5 The product can control a decoupled heating circuit and a Reference Control Number Carrying out the directly connected domestic hot water cylinder. number for system of cir- wiring the basic cuits Reference Control Number Carrying out the diagram number for system of cir-...
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5 Installation ▶ 5.1.3 Basic system diagram type 3: Decoupled Connect the external pump for the decoupled heating circuit to the plug X16 for the main PCB. heating circuit plus one decoupled ▶ domestic hot water cylinder Connect the pump for the decoupled domestic hot water circuit to the plug X13 for the main PCB.
Installation 5 ▶ ▶ In order to control the cylinder's post-heating, connect In order to control the cylinder's post-heating, connect a VR 10 temperature sensor or a thermostat to the plug a VR 10 temperature sensor or a thermostat to the plug that is connected to the main PCB.
5 Installation Connecting gas and water Wiring diagram (→ Page 47) Danger! Requirements Risk of explosion or scalding caused by ▶ Make sure that the existing gas meter is capable of incorrect installation. passing the rate of gas supply required. (→ Page 53) ▶...
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Installation 5 product before you carry out the gas leak- Note tightness test. In order to keep heat losses to a minimum, we ▶ If, during gas leak-tightness tests, you recommend that you provide heat insulation for have closed the gas stopcock that is in- the water pipe spigots on the product's outlet and on the installation.
5 Installation 5.5.4.2 Connecting the condensate discharge pipe. Connect the heating circuit to the connections for the heating flow and return. Install an expansion vessel in the heating return (6), as close to the product as possible. – Ensure that the volumetric capacity of the expansion vessel is sufficient for the system volume.
Installation 5 5.6.5 Air/flue pipe in long lengths Install the air/flue pipe using the set-up instructions. Applicability: Germany 5.6.2 B23 installation OR Luxemburg A flue system for permitted unit type B23 (open-flued gas- fired wall-hung boilers) requires careful planning and imple- ▶...
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5 Installation 5.7.1.2 Closing the electronics box 5.7.3 Establishing the power supply Close the cover by pushing it downwards onto the elec- Observe all valid regulations. tronics box. – The applicable regulations state that the connection Ensure that all of the clips audibly click into the retain- must be made via an electrical partition with a con- ers.
Operation 6 Live Monitor (status codes) You can use the optional multi-functional module to actuate two further additional components. Menu → Live monitor 5.7.6.1 Using the additional relay Status codes in the display provide information on the pro- duct's current operating mode. Connect an additional component directly to the integ- Status codes –...
7 Start-up – Treating the filling and supplementary water Fernox F3 ▶ – Sentinel X 300 Observe all applicable national regulations and technical – standards when treating the filling and supplementary Sentinel X 400 water. Additives intended to remain permanently in the installation Applicability: Germany –...
7 Start-up ▶ 7.5.6 Setting the maximum heating output Press and hold the buttons at the same time. ▶ Also press the reset button for a short time. The product's maximum heating output can be adjusted to ▶ Press and hold until the display shows the the installation's heat demand.
Start-up 7 Display Meaning Conditions: The product design is not compatible with the local gas type ▶ P.00 Purging check programme: Do not start up the product. ▶ The internal pump is cyclically actuated. Carry out a gas conversion in accordance with your in- The heating circuit and the domestic hot water circuit stallation.
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7 Start-up Alternatives 2 / 2 ‒ Measuring the gas pres- Gas connection pressure/gas flow pressure sure at the gas connection: difference for G31 ▶ Undo the test nipple screw (C) at the gas connec- Permitted gas flow Permitted gas flow tion.
Start-up 7 Set values, G20 natural gas (→ Page 52) If an adjustment is not possible in the specified adjust- ment range, do not start up the product. Set values, G25 natural gas (→ Page 52) – Inform Customer Service. Set values, G31 liquefied petroleum gas (→...
8 Adapting the unit to the heating installation Adapting the unit to the heating Set maximum burner anti-cycling time (target) installation Flow ℃ To reset the most important system parameters, call up the 29.0 33.0 37.0 41.0 45.0 49.5 Appliance config. menu item. 25.5 29.5 33.0...
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Adapting the unit to the heating installation 8 8.2.5 Setting the heating pump 8.2.5.3 Product pump curve and operating range 8.2.5.1 Pump mode setting Applicability: VC 406/5-5 (E-DE) OR VC 406/5-5 (LL-DE) The product is equipped with a stage-controlled high-effi- ciency pump.
9 Handing over to the end user 8.2.6 Setting the maximum flow temperature 10.1 Contacting your service partner You can use diagnostics code D.071 to set the required If you contact your service partner, if possible, please men- maximum flow temperature for the heating mode (factory tion setting: 75 °C).
Troubleshooting 10 10.7 Using check programmes ▶ You can also use the check programmes for troubleshooting. (→ Page 22) 10.8 Resetting parameters to factory settings ▶ To simultaneously reset all parameters to the factory settings, set diagnostics code D.096 to 1. 10.9 Replacing defective components Carry out the preparatory work before undertaking any...
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10 Troubleshooting 13. Remove the retainer (2) for the gas valve assembly. To do this, undo the three screws (1). 14. Undo the fixing screws (3) for the Venturi. Pull out the plugs (1), (2), (3), (4) and (5). 15. Remove the Venturi (4). Undo the three screws (7) between the mixture pipe 16.
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Troubleshooting 10 Conditions: Gas valve assembly – Carry out a leak-tightness check, check the CO2 content and adjust this, if required. Conditions: Venturi – Check the CO₂ content and adjust this, if re- quired. Conditions: Fan – Check the CO₂ content and adjust this, if re- quired.
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10 Troubleshooting 10.9.6 Replace the pressure sensor Install the new temperature sensor. When reinstalling, note the colour of the conductors. – Blue conductor: Heating return – Red conductor: Heating flow 10.9.8 Replacing the pump Pull out the plug for the pressure sensor. Remove the fastening clip (1).
Inspection and maintenance 11 10.9.9.1 Replacing the main PCB Reinstall the main PCB. 10.9.9.3 Replacing the main PCB and control element's PCB at the same time If you are replacing both components at the same time, the product switches directly to the menu to select the language after switching on.
11 Inspection and maintenance Test Note Display Action programme The compact thermal module consists of five main T.06 Check external The external heating pump components: pump (if present) is switched on – Speed-regulated fan, and off. – Gas valve assembly including support plate, T.08 Checking the Product starts up and...
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Inspection and maintenance 11 11.3.4 Checking the burner Remove the plugs (1) and (2) from the fan motor by pushing in the latching lug. Remove the plug from the gas valve assembly (3). Unscrew the four nuts (6). Remove the fixing tab (7) for the air intake pipe. 10.
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11 Inspection and maintenance 11.3.7 Cleaning the rainwater collector's draining circuit Connect the gas pipe (4) using a new seal. Open the gas stopcock. Make sure that there are no leaks. Check that the sealing ring in the air intake pipe (3) is positioned correctly in the seal seat.
Inspection and maintenance 11 Fill the lower section of the siphon with water up to 10 Replace the seal on the air separation system's hous- mm below the upper edge of the condensate discharge ing. pipe. Reattach the housing for the air separation system and Re-insert the float (3).
Dispose of the packaging correctly. ▶ Observe all relevant regulations. 14 Customer service Applicability: Germany Auftragsannahme Vaillant Kundendienst: 021 91 5767901 Applicability: Luxemburg Kontaktdaten für unseren Kundendienst finden Sie unter der auf der Rückseite angegebenen Adresse oder unter www.vaillant.de. Installation and maintenance instructions ecoTEC plus 0020261188_00...
Appendix Appendix Diagnostics code – overview Note Since the code table is used for various products, some codes may not be visible for the product in question. Default User-spe- Code Parameter Values or explanations setting cific setting D.000 Partial heating load Adjustable partial heating load in kW Auto Auto: The product automatically adjusts the maximum...
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Appendix Default User-spe- Code Parameter Values or explanations setting cific setting D.025 Domestic hot water generation en- 0 = No abled by eBUS control 1 = Yes D.026 Control of the optional grey relay 1 = Circulation pump 2 = External pump 3 = Cylinder charging pump 4 = Smoke flap 5 = External solenoid valve...
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Appendix Default User-spe- Code Parameter Values or explanations setting cific setting D.068 Unsuccessful ignitions at 1st attempt Number of unsuccessful ignitions Not ad- justable D.069 Unsuccessful ignitions at 2nd at- Number of unsuccessful ignitions Not ad- tempt justable 30 … 80 ℃ 75 ℃...
Appendix Default User-spe- Code Parameter Values or explanations setting cific setting D.149 Precise information about circulation If fault F.75 occurs, read the explanation below for fault F.75 the relevant value of the diagnostics code in order to analyse the problem. 0 = No fault 1 = Pump blocked 2 = Electrical pump fault...
Appendix Status code Meaning S.98 Flow/return sensor test running, heating demands are blocked. S.108 Purging process is running Fault messages – Overview Message Possible cause Measure ▶ F.00 Flow temperature sensor NTC plug loose/not plugged in Check the NTC plug and plug connection. interruption ▶...
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Appendix Message Possible cause Measure ▶ F.27 Safety shutdown: Flame Moisture on the PCB Check that the PCB works correctly. simulation ▶ Flame monitor defective Replace the flame monitor. ▶ F.28 Ignition unsuccessful Gas stopcock closed Open the gas stopcock. ▶...
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Appendix Message Possible cause Measure ▶ F.61 Gas safety valve drive Gas valve assembly defective Replace the gas valve assembly. fault ▶ PCB defective Replace the PCB. ▶ F.62 Gas safety valve connec- PCB defective Replace the PCB. tion fault ▶...
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Appendix Message Possible cause Measure F.75 Pump fault/water defi- D.149 = 7, incorrect pump de- The detected pump is not correct for the product code; check ciency tected the product code. Use the pump that has the correct article number. D.149 = 8, flow rate at the end Check whether the stopcocks and thermostatic valves are of the purge programme is in-...
Appendix Wiring diagram Burner X100 eBUS 230V~ 1 2 3 4 0020261188_00 ecoTEC plus Installation and maintenance instructions...
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Appendix Main PCB (BMU) Plug for the domestic hot water cylinder's contact (optional) PCB for the control element (AI) Water pressure sensor Gas valve assembly Heating pump control signal Temperature sensor in the heating flow Control of the optional relay D.026 Temperature sensor in the heating return Power supply for the prioritising diverter valve or Pressure switch...
Appendix Maintenance work Interval Cleaning the rainwater collector's draining circuit Annually Test that the product/heating installation and the domestic hot water gen- Annually eration (if required) are working correctly. If required, carry out a purging process. Check the product for gas, flue gas and water leaks Annually Checking and, if required, correcting the position of the frost protection Annually...
Appendix Technical data Technical data – Heating VC 406/5-5 (E-DE) VC 406/5-5 (LL-DE) Maximum heating flow temperature (default setting – D.71) 75 ℃ 75 ℃ 30 … 80 ℃ 30 … 80 ℃ Range for the heating flow temperature control Maximum permissible pressure (PMS) 0.4 MPa 0.4 MPa...
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Appendix VC 476/5-5 (E-DE) VC 476/5-5 (LL-DE) Effective output range (P) at 50/30 °C 8.7 … 48.0 kW 8.7 … 48.0 kW Effective output range (P) at 80/60 °C 7.8 … 44.1 kW 7.8 … 44.1 kW Maximum heat input – heating (Q max.) 45.2 kW 45.2 kW Minimum heat input –...
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Appendix VC 406/5-5 (E-DE) VC 406/5-5 (LL-DE) 78 ℃ 78 ℃ Flue gas temperature in heating mode at P max. 80/60 °C Nominal efficiency at 80/60 °C 98.2 % 98.2 % Nominal efficiency at 50/30 °C 107.0 % 106.7 % Nominal efficiency at 60/40 °C 103.6 % 104.2 %...
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Appendix VC 636/5-5 (E-DE) VC 636/5-5 (LL-DE) G20 gas supply pressure 2.0 kPa (20.0 mbar) G25 gas supply pressure 2.0 kPa 2.0 kPa (20.0 mbar) (20.0 mbar) G31 gas supply pressure 5.0 kPa 5.0 kPa (50.0 mbar) (50.0 mbar) CE number (PIN) CE-0063CS3428 CE-0063CS3428 Smoke mass flow in heating mode at P min.
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Appendix VC 636/5-5 (E-DE) VC 636/5-5 (LL-DE) IP rating IPX4D IPX4D Permissible connected voltage 195 … 253 V 195 … 253 V 0020261188_00 ecoTEC plus Installation and maintenance instructions...
Index Index Function menu..............33 Gas connection ..............14 Additional relay..............22 Gas setting ................23 Gas type ................14 Air ratio setting ..............24 Air separation system, filter ..........37 Handing over to the end user ..........28 Air/flue pipe, connecting ............16 Air/flue pipe, installed ............
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Index Return temperature control ..........28 Safety device................. 4 Schematic drawing ..............4 Self-test for the components ..........33 Serial number ................ 7 Service message..............28 Service partner ..............28 Setting the CO₂ content............24 Setting the pump curve ............27 Setting the pump output ............
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