Download
Share
Print this page
Vaillant ecoTEC plus VUI Series Installation And Maintenance Instructions Manual
  1. Manuals
  2. Brands
  3. Vaillant Manuals
  4. Boiler
  5. ecoTEC plus VUI Series
  6. Installation and maintenance instructions manual

Vaillant ecoTEC plus VUI Series Installation And Maintenance Instructions Manual

Hide thumbs Also See for ecoTEC plus VUI Series:

Advertisement

Quick Links

Download this manual
ecoTEC plus
VUI ..
en Installation and maintenance instructions

Advertisement

loading

Related Manuals for Vaillant ecoTEC plus VUI Series

Summary of Contents for Vaillant ecoTEC plus VUI Series

  • Page 1 ecoTEC plus VUI .. en Installation and maintenance instructions...
  • Page 2 Installation and maintenance Calling up/setting diagnostics codes ....32 Running a check programme ......32 instructions Carrying out the actuator test ......32 Contents Calling up the data overview ....... 32 Calling up status codes........32 Exiting the menu level.......... 32 Safety ..............
  • Page 3 13.4 Limp home mode messages ....... 51 13.5 Resetting parameters to factory settings ..... 51 13.6 Eliminating faults in the product......51 13.7 Replacing defective components......52 Decommissioning..........61 14.1 Activate the standby mode ........61 14.2 Temporarily decommissioning......61 14.3 Permanently decommissioning......
  • Page 4 – Any use other than those described in Safety these instructions and any use that goes Intended use beyond what is described here The product is intended as a heat generator Qualification for sealed heating installations and for do- mestic hot water generation. The person carrying out the work described here must have completed professional train- Improper use of any kind is prohibited.
  • Page 5 ▶ Do not use naked flames (e.g. lighters, 1.3.3 Air supply matches). Unsuitable or insufficient combustion and ▶ Do not smoke. room air may lead to material damage, but ▶ Do not use any electrical switches, mains also to life-threatening situations. plugs, doorbells, telephones or other com- ▶...
  • Page 6 You can find a list of relevant standards at: ▶ Before carrying out soldering work, remove https://www.vaillant.co.uk/standards all sealing materials. ▶ Separate components which may be in- ternally damaged by heat from each other.
  • Page 7 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 8 Technical data Technical data – General VUI 30/40 Designated country (designation in accordance GB, IE with ISO 3166) Permitted gas boiler category (depending on the unit version) CE PIN 0063CU3910 UKCA PIN 0063CU3910 Gas connection, boiler side 15 mm G 3/4 ″ Flow/return heating connections, boiler side Domestic hot/cold water connections, boiler side G 3/4″...
  • Page 9 Technical data – Heating VUI 30/40 85 ℃ Max. flow temperature 30 to 80 ℃ Flow temperature adjustment range (factory set- ting: 75 °C) Permissible operating pressure 0.25 MPa (2.50 bar) Nominal circulation water volume based on 1,318 l/h ΔT = 20 K, 80/60 °C Approx.
  • Page 10 10 - 36 Nominal heat output Condensing boiler Vaillant is a full member of the Hot Water Association and promotes the scheme in association with its cylinder range. Stainless steel heat exchanger Details are available on the web site www.vaillant.co.uk...
  • Page 11 – Today Information Meaning – Yesterday Permissible operating pressure, heating – Last month mode – Last year Maximum output power – Total Permissible operating pressure for do- mestic hot water mode The recording of the values only includes the product in the factory-delivered condition.
  • Page 12 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. 5.12.2 Overheating Safety The boiler software is designed to recognise the potential for an overheat lockout and will shutdown before this happens.
  • Page 13 Quantity Designation - Shift-load cylinder-out connection pipe - Drain hose for the expansion relief valve on the shift-load cylinder - Bag with small parts Heat generator installation set containing the following: - Bag with drain pipe and screwed connec- tion for the expansion relief valve - Gas isolation valve - Gas connection pipe, 15 mm diameter - Domestic hot water connection pipe...
  • Page 14 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 if the product is fitted with a concentric flue system. Using the mounting template ▶...
  • Page 15 7.1.3 Carrying out basic preparation for the Note installation The subsequent check is an approximation method, which does not replace a detailed Make sure that the existing gas meter is capable of technical design. The result only provides a rough passing the rate of gas supply required.
  • Page 16 In IE the minimum distances for flue terminal positioning Condition: External expansion vessel installed and warm start active must be those detailed in I.S. 813 “Domestic Gas Installa- ▶ Install a non-return valve in the product outlet (heating tions”. flow) or decommission the internal expansion vessel in The terminal must be exposed to the external air, allowing order to prevent the warm start function from being in- free passage of air across it at all times.
  • Page 17 7.2.3 Position of the air/flue terminal 7.2.3.1 Positioning the terminal of a fan-supported flue system Installation site Dimensions 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 18 Installation site Dimensions 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 19 7.2.4.3 Vertical Concentric Flue ⌀ 60/100 mm or 7.2.4 Flue Configuration Description ⌀ 80/125 mm (C33 type installation) 7.2.4.1 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 2.0 m from the...
  • Page 20 7.2.6 Replacing the standard connector for the Condition: Gas isolation valve without test nipple air/flue pipe, where required 7.2.6.1 Removing the standard connector for the air/flue pipe ▶ Connect the product to the gas pipe as shown in accord- ance with the recognised rules of good engineering prac- tice.
  • Page 21 Installing pipe connections between the shift-load cylinder and the heat generator 90° 90° ▶ Turn the gas isolation valve (1) by a 90° rotation: – Open: Rotate by 90° anti-clockwise – Close: Rotate by 90° clockwise Install pipe connections for domestic hot and cold wa- ter between the shift-load cylinder and heat generator.
  • Page 22 ▶ Installing the heating flow and heating return Ensure that the condensate discharge pipe terminates in a suitable location. Further information can be obtained from BS 6798 Specification for installation of gas–fired boilers of rated input not exceeding 70 kW net. ▶...
  • Page 23 7.7.1.1 Direct Connection to internal soil and vent Preferred option for external termination stack 7.7.1.5 External termination into soakaway Ø32mm ≤ 3 m Ø22mm ≥ 500 mm 100 mm Preferred option Ø12 7.7.1.2 Direct connection to external soil and vent stack Ground (either/or) Bottom of sealed tube...
  • Page 24 7.7.1.7 External termination into rain water down Installing the drain pipe on the expansion pipe relief valve 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. ≤...
  • Page 25 7.10 Electrical installation Only qualified electricians may carry out the electrical install- ation. Danger! Risk of death from electric shock! The power supply terminals L and N remain live: ▶ Disconnect the product from the power supply by switching off all power supplies at all poles (electrical partition with a con- tact gap of at least 3 mm, e.g.
  • Page 26 7.10.2 Removing the front casing 7.10.3 Opening the electronics box 2×1 4×1 Ensure that you do not load the electronics box. 7.10.4 Closing the electronics box 2×1 4×1 Loosen the two screws on the left and right on the un- derside of the product, but do not unscrew them com- pletely.
  • Page 27 7.10.5 General information 24V / eBus 7.10.5.1 Requirements for the mains voltage and sensor lines Observe the following requirements for the mains voltage and sensor lines: Line cross-section ≥ 1.5 mm² Supply line for mains voltage (pump or mixer (≥ 0.0023 in²) mains cable) ≥...
  • Page 28 – 7.10.5.4 Stripping the cables correctly Power supply: Single-phase, 230 V, 50 Hz – Fuse protection: ≤ 3 A Do not interrupt the mains supply with a time switch or 230 V programmer. For the power supply cable, use a flexible three-core ≥...
  • Page 29 Slot Item Function RT 230V Mains main power supply 230 V input Caution. Risk of material damage due to high connected voltage. 2×1 At mains voltages greater than 253 V, electronic com- ponents may be damaged. ► Ensure that the mains voltage is 230 V ►...
  • Page 30 X100 Bus connection control Room controls which use eBUS are connected to this Vaillant control with eBUS interface. The interface supplies the control with electricity communication can be con- nected to this slot. and is also used for signal communication.
  • Page 31 Smart room controls are available when an eBUS room con- trol and a suitable Vaillant gateway are present. The room control can be set and operated using the Vaillant app. For connection, follow the instructions in the enclosed installation instructions.
  • Page 32 Operation 8.4.1 Exiting a check programme ▶ Operating concept Press ◁ The basic display is shown. The operating concept, the operation of the product and the read-out and setting options in the end user level are de- Carrying out the actuator test scribed in the operating instructions.
  • Page 33 Check this list before power on and first commissioning. Num- Check (✓) Electrical Check the wiring of controls is correct (Vaillant eBUS) or third party controls Correct cable size and type have been used 0020308121_04 Installation and maintenance instructions...
  • Page 34 Carrying out the initial start-up Total Water hardness at specific system volume heating Initial start-up must be carried out by a customer service > 20 l/kW output ≤ 20 l/kW > 40 /kW ≤ 40 l/kW technician or an authorised competent person using the Benchmark Checklist.
  • Page 35 Deactivating standby mode 9.5.6 Contact details ▶ If required, store your telephone number and your com- Note pany name in the Appliance config. (max. 16 digits/no If the product is connected via a fixed connection, blank spaces). The end user can view the telephone the product is switched on as soon as the power number.
  • Page 36 Flushing the heating installation for the first Monitor the rising filling pressure in the heating installa- tion. time ("cold") Fill with water until the required filling pressure is Note reached. The complete heating system must be flushed After filling, close isolation valve (4) first and then isola- at least twice: Once with cold water and once tion valve (3).
  • Page 37 9.12 Filling the condensate siphon Never fill the condensate siphon via the air/flue con- nector. Loosen the lower section of the siphon (3) by turning the upper section of the siphon (1) by a quarter turn and pull it downwards and out. Remove the float (2).
  • Page 38 Result 2: The product design is compatible with the local gas group. ▶ Check the gas connection pressure/gas flow pres- sure. (→ Section 9.13.3) ▶ Check the O₂ content. (→ Section 9.13.4) 9.13.2 Checking the air/flue pipe/flue gas recirculation Check whether the front casing (vacuum chamber) has been closed tightly.
  • Page 39 Hinge the electronics box upwards. Open the test opening at the flue gas analysis point. Position the measuring probe for the flue gas analyser. Check the noted measured value against the manufac- Start chimney sweep mode (→ Section 8.9). turer details. Ensure that the heat load is correct.
  • Page 40 ▶ In addition, ensure that maximum heat can be dissipated Note into the heating system by turning up the room thermo- The actual reading on the digital pressure stat. gauge should ideally be 0,05 MPa (0,5 bar) ▶ Wait at least 5 minutes until the boiler has reached its plus an additional pressure corresponding operating temperature.
  • Page 41 10.2 Activating an additional component for the 10.3.2.3 Setting the desired temperature multi-functional module → System control operating and installation instructions Condition: Components connected to relay 1 The system control can be used to set the desired temperat- ure. ▶ Select the parameter D.027 to assign a function to re- The desired temperature is the temperature that is desired lay 1.
  • Page 42 The heating water volume flow that is established by the Set maximum burner anti-cycling time (tar- internal heating pump in the heating installation is used to [min] Flow get) [°C] transfer the heat input. To build up the volume flow, different hydraulic operating modes are available, which you can se- lect via D.170.
  • Page 43 ▶ Underfloor heating systems Heating system with radiators and decentralised underfloor heating Decoupling of the heat generator from the heating system (low loss …. header, plate heat exchanger, buffer Regulate the pressure at the circulation valve (1) in a cylinder) clockwise direction.
  • Page 44 1400 1200 1000 Outdoor temperature °C Target room temperat- ure °C Potential heating sys- 3 K system Target flow temperature Axis a tem cycles [l/h] °C 5 K system Maximum heat output 8 K system If the heat curve 0.4 is selected and 21 °C is specified for the of underfloor heating target room temperature, the heat curve is then translated, systems [kW]...
  • Page 45 ▶ Pass all of the instructions and documentation for the Condition: Solar connection set installed, inlet temperature sensor available product to the end user for safe-keeping. ▶ ▶ Set diagnostics code D.058. (→ Section 8.3) Inform the end user about measures taken to ensure ▶...
  • Page 46 12.4 Actuator test 12.7 Removing/installing the compact thermal module MENU → SETTINGS → Installer level → Test modes → Ac- tuator test The actuator test allows you to actuate and test individual components in the heating installation. Actuator test (→ Appendix H) 12.5 Inspection and maintenance ▶...
  • Page 47 Result: Heat exchanger dirty ▶ Clean the heat exchanger. (→ Section 12.8.2) Check the insulating mat on the heat exchanger for damage. Result: Insulating mat damaged ▶ Replace the insulating mat (→ Spare parts instruc- tions for the heat exchanger insulating mat). 12.7.2 Installing the compact thermal module Unscrew the air intake pipe (1) from the upper retainer and remove the air intake pipe from the intake stub, as...
  • Page 48 12.8.2 Cleaning the heat exchanger Never undo the four nuts on the stud bolt or tighten them. Clean the spiral immersion heater (1) of the heat ex- changer (3) using a plastic brush and, if required, vin- egar (up to max. 5% acid content). –...
  • Page 49 12.8.4 Checking and, if required, supplementing Remove the cover. ◁ the pre-charge pressure for the internal The expansion vessel is freely accessible. expansion vessel Unscrew the sealing cap (3) from the expansion ves- sel. Drain the product. (→ Section 12.9) Check whether the pre-charge pressure of the expan- sion vessel is approx.
  • Page 50 Fill the lower section of the siphon with water up to a Switch the product back on if this has not yet been filling level 10 mm below the condensate discharge (4). done. (→ Section 9.4) Insert the float. 12.8.9 Checking the Protection kit, if available Install the lower section of the siphon on the condens- ate siphon.
  • Page 51 13.2 Service messages Reversible limp home mode codes (→ Appendix J) Irreversible limp home mode codes (→ Appendix K) If the set maintenance interval has passed or if a service message has been issued, appears in the display. The 13.4.1 Requesting the limp home mode history product is not in fault mode.
  • Page 52 13.7 Replacing defective components Carry out the preparatory work before undertaking any repair work. (→ Section 13.7.2) Carry out the work required to finish the task before undertaking any repair work. (→ Section 13.7.20) 13.7.1 Procuring spare parts The original components of the product were also certified by the manufacturer as part of the declaration of conformity.
  • Page 53 13.7.3 Replacing the pump head 13.7.4 Eliminating the condensate discharge blockage (F.028 or F.029) Pull out the plugs (5) and (6) from the pump head. Undo the four screws (4). Remove the pump head (3). Check the inside of the lower section of the pump (1) for dirt.
  • Page 54 Remove the compact thermal module. (→ Section 12.7.1) Remove the ignition electrode. (→ Section 13.7.17) Turn the two screws (5) between the burner flange (6) and the fan. Remove the burner flange. Fit the new burner (3) with a new burner seal (2) to the Remove the plug or, if required, the two plugs from the new burner flange.
  • Page 55 13.7.7 Replacing the gas valve assembly If the offset that you read has five digits, set dia- gnostics code D.052 using the first three digits. Removing the gas valve assembly (→ Section 8.3) If the offset that you read has three digits, set diagnostics code D.052.
  • Page 56 Insert the new heat exchanger into the grooves on the back panel. Screw in a new screw tightly on the underside of the heat exchanger. If you have removed an existing front retainer, use two screws each to screw the retainer in tightly. Secure the condensate discharge hose on the heat exchanger.
  • Page 57 Pull the plug X12 out of the PCB. Connect the connection cable plug to the new impeller sensor. Pull the free end of the line carefully through the grom- mets on the heat generator and on the shift-load cylin- Reinstall the drain pipe (1) and use new seals. der.
  • Page 58 Read the offset (1) that is printed on the rear (type A) or underside (type B) of the gas valve assembly and note this down. Use a mirror, for example. Vaillant GmbH Vaillant GmbH Berghauser Str. 40 42859 Remscheid, Germany Berghauser Str.
  • Page 59 Install the new PCB in reverse order. Reconnect the plug on the earth cable. Start up the product. 13.7.18 Replacing the control electrode 13.7.17 Replacing the ignition electrode Danger! Danger! Risk of death from hot flue gases! Risk of death from hot flue gases! Seals, screws and insulation on the control electrode and combustion chamber must not Seals, screws and insulation on the control...
  • Page 60 13.7.20 Completing repair work Open the gas stopcock. Connect the product to the power supply. Activate diagnostics code D.147 via D.146. (→ Section 8.3) Set diagnostics code D.147 to New electrode (→ Section 8.3). Check the O₂ content. (→ Section 9.13.4) 13.7.19 Routing wiring harnesses Note High temperatures may damage the wiring har-...
  • Page 61 Check that the 230 V voltage is no longer present in the product. 15 Disposing of the packaging ▶ Dispose of the packaging correctly. ▶ Observe all relevant regulations. ▶ For detailed information refer to www.vaillant.co.uk. 0020308121_04 Installation and maintenance instructions...
  • Page 62 Appendix Tightening torques Manufacturer's recommendation for the tightening torques Component Value Unit Gas valve assembly, union 60° Degrees Burner, fixing screws Fan flange, mixture pipe screws Fan, gas valve assembly screws Gas valve assembly, test nipple screw plug Gas isolation valve, test nipple screw plug Ignition electrode, fixing screws...
  • Page 63 Maintenance work Interval 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...
  • Page 64 Installer level Note Since the code table is used for various products, some codes or some steps may not be visible in the installation assistant. Setting level Values Factory Unit Increment, select, explanation setting Min. Max. Enter access code 1 (competent person code 17) Data overview Current value Installation assistant...
  • Page 65 Setting level Values Factory Unit Increment, select, explanation setting Min. Max. → T.001 - T.007 Current value You can find more detailed information in the table of actuator tests. Diagnostics codes → D.XXX - D.XXX Current value You can find more detailed information in the table of diagnostics codes.
  • Page 66 Diagnostics code Values Setting Unit Increment, select, explanation Min. Max. Factory Current D.000 Product- Adjustable partial heat load: The dependent adjustment range can be viewed in Maximum load in heating mode the technical data. Not all products have an adjustment range. Auto Auto: Product automatically adjusts the max.
  • Page 67 Diagnostics code Values Setting Unit Increment, select, explanation Min. Max. Factory Current D.023 Current value Off, On Status of the heat demand D.025 Current value Off, On Status of the eBUS control's domestic (Displayed if a control is connected.) hot water demand D.026 1: Circulation pump Function of internal additional relay...
  • Page 68 Diagnostics code Values Setting Unit Increment, select, explanation Min. Max. Factory Current D.058 3: Min. target DHW val. 60 °C Solar circuit post-heating 5: Auto Outlet temperature 40 °C: – At an inlet temperature ≤ 35 °C, the heat generator starts in order to reach the set outlet temperat- ure.
  • Page 69 Diagnostics code Values Setting Unit Increment, select, explanation Min. Max. Factory Current D.077 Output- Max. load dependent Maximum load in domestic hot water mode ℃ D.078 Maximum target flow temperature Note value for domestic hot water The chosen value must be at least 15 K or 15 °C above the set target cylinder value.
  • Page 70 Diagnostics code Values Setting Unit Increment, select, explanation Min. Max. Factory Current D.145 Current value Diagnostics code for deactivating the check of the flue gas blockage. Deactivate detection: Air/flue pipe blocked Only use this diagnostics code if the product displays fault code F.035 during the initial start-up.
  • Page 71 Diagnostics code Values Setting Unit Increment, select, explanation Min. Max. Factory Current D.166 1: Check the flow temperature sensor ADC fault index 2: Check the return temperature sensor 5: Check the heat cell coding resistor 6: Check the control electrode 7–8: Check the ignition electrode 9: Check the DHW inlet temperature sensor...
  • Page 72 Status codes Note Since the code table is used for various products, some codes may not be visible for the product in question. Code Meaning S.000 There is no demand for heating mode. S.001 Heating mode is active and the fan is in prerun mode. S.002 Heating mode is active and the heating pump is in prerun mode.
  • Page 73 Code Meaning S.092 The self-test for the circulation water volume is active. S.093 A flue gas analysis is not currently possible. S.096 The self-test for the return temperature sensor is active. The heat demands are blocked. S.097 The self-test for the water pressure sensor is active. The heat demands are blocked. S.098 The self-test for the flow and return temperature sensor is active.
  • Page 74 Code/meaning Possible cause Measure ▶ F.013 Fault in the electrical connection Check and, if required, replace the wiring harness between the for the cylinder temperature PCB and sensor, including all plug connections. The cylinder temperature sensor sensor has short-circuited. ▶ Cylinder temperature sensor Check and, if required, replace the cylinder temperature defective...
  • Page 75 Code/meaning Possible cause Measure ▶ F.024 Fault in the electrical connec- Check and, if required, replace the wiring harness between the tion for the return temperature PCB and sensor, including all plug connections. The temperature increases too sensor quickly. ▶ Flow temperature sensor de- Check and, if required, replace the flow temperature sensor.
  • Page 76 Code/meaning Possible cause Measure ▶ F.028 Fault in the flue gas route Check the entire flue gas route. caused by recirculation or flue The flame signal was not detec- gas blockage ted during the ignition phase. ▶ Ignition transformer not connec- Check the plug and the plug connection.
  • Page 77 Code/meaning Possible cause Measure ▶ F.035 Condensate pump (if fitted) Check and clean the condensate pump. Replace the condens- defective ate pump, if required. The air/flue pipe is blocked. ▶ Insufficient combustion air sup- Check the combustion air supply. ▶ Control electrode defective Check and, if required, replace the control electrode.
  • Page 78 Code/meaning Possible cause Measure ▶ F.044 Interruption in the wiring har- Check the wiring harness including all plug connections and, if ness required, replace it. The ionisation signal for the ▶ control electrode is too low. The Burner defective Check and, if required, replace the burner. drift adaptation has failed.
  • Page 79 Code/meaning Possible cause Measure ▶ F.064 Sensor defective Check the sensor displayed under D.166. ▶ The sensor signal could not be PCB defective If the displayed value for D.166 is > 20 and is not listed, re- converted correctly. place the PCB. ▶...
  • Page 80 Code/meaning Possible cause Measure F.078 Fault in the electrical connection For products without integrated domestic hot water genera- for the domestic hot water con- tion: Check whether the bridge on plug X2 betwen contacts The control centre is not sup- nection temperature sensor 2 and 5 is plugged in and is without interruption.
  • Page 81 Code/meaning Possible cause Measure ▶ F.090 Interruption in the wiring har- Check the wiring harness including all plug connections and, if ness required, replace it. Communication with the internal ▶ cylinder has been interrupted. Plug on PCB loose/not plugged Check the plug and the plug connection. ▶...
  • Page 82 Code/meaning Possible cause Measure F.096 Air-mass flow sensor dirty or Check the air-mass flow sensor for dirt. defective (only in conjunction The gas valve stepper motor If required, replace the entire air intake pipe. with the conversion set compris- has reached the maximum per- ing the air intake pipe with in- missible step number.
  • Page 83 Code/meaning Possible cause Measure ▶ F.326 3-port diverter valve defective or Check and, if required, replace the 3-port diverter valve. blocked The hydraulic sensor and actu- ▶ ator test has detected at least Plug on 3-port motorised valve Check the plug and the plug connection on the 3-port motor- two hydraulic components that loose/not plugged in ised valve.
  • Page 84 Code/meaning Possible cause Measure F.347 Condensate in the combustion Check and, if required, clean the condensate discharge pipe chamber due to a blocked con- including the siphon. Condensate has been detected densate discharge in the combustion chamber. The Check the combustion chamber (electrodes, insulating mats, burner operation is interrupted.
  • Page 85 Maintenance codes Note Since the code table is used for various products, some codes may not be visible for the product in question. Code/meaning Possible cause Measure I.003 Maintenance interval elapsed Carry out maintenance work. The product's maintenance time Reset the service interval. has been reached.
  • Page 86 Code/meaning Possible cause Measure ▶ N.027 Temperature sensor defective Check and, if required, replace the temperature sensor. The signal for the temperature Short circuit in the connection Check whether the outlet temperature displayed under sensor on the domestic hot wa- cable D.003 is 116 °C.
  • Page 87 Code/meaning Possible cause Measure N.096 Air-mass flow sensor dirty or Check the air-mass flow sensor for dirt. defective (only in conjunction The gas valve stepper motor If required, replace the entire air intake pipe. with the conversion set compris- has reached the maximum per- ing the air intake pipe with in- missible step number.
  • Page 88 Code/meaning Possible cause Measure ▶ N.270 Flow rate quantity set incor- Set the flow rate quantity on the cold water adjusting valve. rectly on the cold water adjust- The temperature spread via ing valve (only on a product the secondary heat exchanger with no factory-installed flow (heating flow –...
  • Page 89 +24V Burner 24V= X100 X100 X12a X12b X12a 230V~ Main PCB Control panel PCB Gas valve assembly for main gas valve Shift-load cylinder Return temperature sensor Gas valve assembly Flow temperature sensor 0020308121_04 Installation and maintenance instructions...
  • Page 90 Surface-mounted thermostat/Burner off Outdoor temperature sensor, flow temperature sensor (optional, external), DCF receiver 24 V DC room thermostat Circulation pump remote control Bus connection (system control/digital room thermo- Control module stat) Water pressure sensor Communication unit Prioritising diverter valve Internal pump Ignition transformer 230 V power supply, fan Ignition electrode...
  • Page 91 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 92 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 93 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 SERVICE/INTERIM WORK ON BOILER Date:...
  • Page 94 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 SERVICE/INTERIM WORK ON BOILER Date:...
  • Page 95 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 96 Index Documents ................10 Drain pipe, expansion relief valve ........24 Actuator test ............35, 46, 84 Electronics box ..............26 Calling up............... 32 Exiting the menu level ............32 Exiting ................32 Fault codes..............51, 73 Advanced Key Lock............. 33 Fault history.................
  • Page 97 Overheating protection ............12 Overrun time, setting ............41 Weight ................. 14 Post-heating ................ 44 Pre-charge pressure for the internal expansion vessel, checking ................49 Pre-charge pressure for the shift-load cylinder expansion vessel, checking ..............49 Preparing, maintenance work..........46 Pressure level..............
  • Page 100 Supplier Vaillant Ltd. Nottingham Road Belper Derbyshire DE56 1JT Telephone 0330 100 3143 info@vaillant.co.uk www.vaillant.co.uk 0020308121_04 Publisher/manufacturer Vaillant GmbH Berghauser Str. 40 D-42859 Remscheid Tel. +49 2191 18 0 Fax +49 2191 18 2810 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.

This manual is also suitable for:

Ecotec plus 610Ecotec plus 615Ecotec plus 620Ecotec plus 625Ecotec plus 630Ecotec plus 635 ... Show all