Vaillant ecoTEC plus VUI Installation And Maintenance Instructions Manual
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Vaillant ecoTEC plus VUI Installation And Maintenance Instructions Manual

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Installation and maintenance instructions
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Installation and maintenance instructions
ecoTEC plus
VUI
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Summary of Contents for Vaillant ecoTEC plus VUI

  • Page 1 Installation and maintenance instructions For the competent person Installation and maintenance instructions ecoTEC plus GB, IE...

  • Page 2: Table Of Contents

    Table of Contents BEFORE PROCEEDING - ENSURE BOILER IS Gas installation .............22 CORRECT FOR GAS GROUP SUPPLIED! Preparing for installation ..........22 Connecting the gas line ..........22 Hydraulic installation ..........23 Table of Contents Preparing for installation ..........23 Connecting the hot and cold water ......24 Connecting pipe connections between the Notes on the documentation ........5 layered storage tank and the boiler ......24...
  • Page 3 Topping up the VUI boiler using a filling device .. 44 Troubleshooting ............69 10.10 Fill and purge the hot water system ......44 13.1 Contact Vaillant Service Solutions 10.11 Filling the condensate siphon ........45 (0870 6060 777) ............69 10.12 Checking the gas ratio setting ........
  • Page 4 Table of Contents Technical data .............. 85 Glossary ................87 Appendix ................ 88 Benchmark Log Book ..........89 EC declaration of conformity ........91 Index ....................92 Installation and maintenance instructions ecoTEC plus 0020134833_01...

  • Page 5: Notes On The Documentation

    Notes on the documentation Identification plate The following information is intended to help you through- The identification plate of the Vaillant ecoTEC plus is out the entire documentation. Further documents apply in attached to the underside of the boiler in the factory.

  • Page 6: Benchmark

    1.2 Type overview appliance. Vaillant Ltd. is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and commissioning of domestic heating and hot water sys- tems in the UK and to encourage regular servicing to opti- mize safety, efficiency and performance.

  • Page 7: Safety

    Safety Safety Intended use The Vaillant ecoTEC plus boilers are constructed using state-of-the-art technology in accordance with the recog- Safety and warning information nised safety rules and regulations. Nevertheless, there is still a risk of injury or death to the operator or others or of >...

  • Page 8: Important Information Regarding Propane-Fired Boilers

    Safety Material damage caused by corrosion Only IE: The installation must comply with the current Ver- sion of I.S.813 "Domestic Gas Installations" and the current To prevent corrosion on the boiler and also on the air/flue Building Regulations. gas duct, note the following: >...

  • Page 9: General Requirements

    Safety General requirements – BS EN 13831 Closed expansion vessels with built in dia- phragm – BS EN 14336 Heating systems in buildings. Installation and commissioning of water based heating systems. 2.5.1 Related documents – BS 5440 – 1 Installation of flues and ventilation for gas appliances of rated input not exceeding 70 kW* To ensure the safe installation and continued satisfactory –...

  • Page 10: Gas Supply

    / or water hammer can result in a pressure build-up that may cause damage to the boiler (and 2.5.4 Air supply other household devices such as showers). Vaillant cannot accept responsibility for damage caused to the boiler or its Detailed recommendations for air supply are given in surroundings where an appliance has been fitted to sup- BS 5440: Part 2.

  • Page 11: Pressure Relief Valve

    1) on systems with circulation water heaters and for systems with tions without exception. electric heating elements Vaillant accepts no liability for the compatibility of any addi- 2) from the specific system volume (nominal capacity in litres/ heating output; for multiple boiler systems, the lowest individual tive or its effectiveness in the rest of the heating installa- heating output should be used).

  • Page 12: Description Of The Unit

    Description of the unit Description of the unit Design The ecoTEC plus 937 consists of – a 15 litre layered storage tank and – a modified VUW boiler Cold water that is heated by the VUW boiler is fed into the insulated layered storage tank by a modulating cylinder charging pump.

  • Page 13: Before Proceeding - Ensure Boiler Is Correct For Gas Group Supplied

    > Remove the layered storage tank from its box. > Remove the protective film from all parts of the layered To control the ecoTEC, Vaillant offers various controller ver- sions for connecting to the switching rail or for plugging storage tank.

  • Page 14: Disposing Of The Packaging

    Installation Quan- Item Description tity Boiler Lower cover of the boiler Installation template Service valves Supply pipes (gas, heating, water, expansion relief valve) Adapter set, consisting of: connection pipes between the layered storage tank and VUW boiler for heating flow and return and water flow and return Bags with parts incl.
  • Page 15 Installation Removal of carton from delivery van Carriage of carton from point of delivery to point of installation – roofspace. Recommend 2 person lift or 1 person with use of sack truck. > If 1 person is performing lift, straddle the load, tilt and >...
  • Page 16 Installation > Recommend wear suitable cut resistant gloves with good Positioning of Appliance for Final Installation – in roof space restricting installation. grip to protect against sharp edges and ensure good grip > If appliance weight is over 25 kg always use 2 persons to when handling appliance.

  • Page 17: Requirements For The Installation Site

    Installation Requirements for the installation site 4.4.2 Using installation templates An installation template is supplied with the boiler to aid wall mounting. 4.4.1 Required minimum clearances/ The template shows the following: installation clearances – The position of the fixing holes for the hanging bracket. –...

  • Page 18: Dimension Drawing And Connection Dimensions

    Installation Dimension drawing and connection dimensions 4.3 Connection dimensions for ecoTEC plus VUI GB 376/5-5 in mm Wall breakthrough for air/flue gas duct 2 Hanging bracket 3 Heating flow (Æ 22 x 1.5) 4 Hot water connection (Æ 15 x 1.5) 5 Gas connection (Æ...
  • Page 19 Installation 4.4 Layered storage tank connection dimensions in mm Heating return (Æ 22 mm) 2 Cold water connection (Æ 15 mm) 3 Hot water connection (Æ 15 mm) 4 Heating flow (Æ 22 mm) 5 Hanging bracket 6 Cover 7 Connection for discharge hose expansion relief valve on the lay- ered storage tank Installation and maintenance instructions ecoTEC plus 0020134833_01...

  • Page 20: Wall-Mounting The Layered Storage Tank

    Installation Wall-mounting the layered storage tank Wall-mounting the boiler Danger! Risk of death if the load-bearing capacity of the fixing elements used is insuffi- cient! If the fixing elements or wall do not have sufficient load-bearing capacity, the layered storage tank may come loose and fall down. This may also cause leaks in the gas line, which is potentially fatal.

  • Page 21: Removing/Fitting The Front Casing

    Installation Removing/fitting the front casing Caution. Risk of damage caused by mechanical tension. Removing both side panels may cause mechanical distortion in the boiler, which can cause damage to the piping, for exam- ple, and potentially result in leaks. > Always only remove one side panel, never both side panels at the same time.

  • Page 22: Gas Installation

    Gas installation Gas installation Connecting the gas line The work described in this section must only be carried out by a competent person. Preparing for installation Danger! Risk of death caused by improper gas installation! An incorrect gas installation may result in leaks and an explosion.

  • Page 23: Hydraulic Installation

    The Vaillant ecoTEC boiler is equipped with a 10 l expansion > Make sure that the drain is visible. vessel with a gas-side filling pressure of 0.075 MPa (0.75 bar), which is suitable for a closed heating system Caution.

  • Page 24: Connecting The Hot And Cold Water

    Hydraulic installation > Fit the supplied pipe elbows and straight pipelines in the Connecting the hot and cold water specified sequence. The pipe elbows (1) and (2) must be fitted first. Connecting the heating flow and heating return 6.1 Fitting the hot and cold water connection >...

  • Page 25: Connecting The Condensate Discharge Pipework

    Hydraulic installation Connecting the condensate discharge The condensate discharge pipework must have a pipework continuous fall (45 mm per metre) and should whenever possible terminate at a suitable dis- charge point within the heated envelope of the Danger! building that will remain frost free under long Risk of death from flue gases! periods of low external temperatures.

  • Page 26: Connecting The Discharge Pipe To The Expansion Relief Valve On The Boiler

    > Note that the end of the line must be visible. > If the pipe cannot fall to a safe discharge point then the Vaillant remote pressure relief valve mounting kit can be used to provide a suitable way to achieve this.

  • Page 27: Flue Gas Installation

    7.2 Scope of delivery for the vertical air/flue gas duct > Only use genuine Vaillant air/flue gas Article number 0020060570 and 0020065937 ducts. Optional 125 mm air/flue gas duct...

  • Page 28: Flue Termination

    Flue gas installation Flue termination The following details refer to all flue systems. The terminal must be positioned such that the prod- ucts of combustion can disperse freely at all times. A plume of water vapour will sometimes be visible from the flue terminal.
  • Page 29 Flue gas installation Minimum Location dimensions Directly below an opening, air brick, opening win- 300 mm dows, etc. B Above an opening, air brick, opening window, etc. 300 mm Horizontally to an opening, air brick, opening win- 300 mm dow, etc. Below temperature-sensitive building components 75 mm e.g.

  • Page 30: Electrical Installation

    Electrical installation Electrical installation Opening/closing the electronics box Opening the electronics box Preparing for installation > Remove the front casing from the boiler (¬ section 4.8). Danger! Risk of death from electric shock! Touching live connections may cause seri- ous personal injury. >...

  • Page 31: Connecting The Layered Storage Tank To The Power Supply

    Electrical installation Connecting the layered storage tank to the power supply Caution. Risk of cable damage. Cables may become damaged if they come into contact with hot parts of the unit. > Observe the routing of the cable. > Open the electronics box (¬ section 8.2). 8.3 Cable routing in the electronics box >...

  • Page 32: Establishing The Mains Connection

    Electrical installation Establishing the mains connection least 3 mm in all poles and supplying the boiler and control- lers only). The point of connection to the mains supply must allow complete electrical isolation of the boiler and its ancil- Danger! lary controllers.

  • Page 33: Connecting The Controller

    Electrical installation > Fit the stripped ends of the conductors with crimp pin Ensure that the connection cables are securely fastened to the plug terminals. terminals to ensure a secure connection free from loose strands and to thus prevent short circuits. >...

  • Page 34: Connecting Additional Components

    You can actuate an additional component with the aid of > Only strip the outer sheathing of flexible the auxiliary relay that is installed in the ecoTEC plus VUI cables to a maximum of 3 cm to prevent GB 937 and you can actuate two other components using short circuits.

  • Page 35: Connection Diagrams

    Electrical installation Connection diagrams Pump PWM signal Display Connection Gas valve Holding magnet Stepper motor white Mass flow sensor Diverter valve Water pressure sensor Impeller blue sensor Warm start sensor  orange Hot water sensor  violet Flow sensor  ...
  • Page 36 Electrical installation Shift load storage tank electronics violet Storage tank black charging sensor (NTC) orange Storage tank sensor (NTC) black blue Inlet sensor secondary heat exchanger (NTC) black Impeller sensor Storage tank charging pump green black Plug connection brown brown black black Burner...

  • Page 37: Operation

    Operation Operation The Vaillant ecoTEC plus boiler is fitted with a digital infor- mation and analysis system (DIA). If additional settings are required, which have not yet been configured using the installation assistant, you can view and modify further parameters using the DIA.

  • Page 38: Overview Of The Menu Structure

    Operation Overview of the menu structure Menu Information Reset burner off time Installer level Back Select Enter code Installer level F.00 Fault list F.75 Interruption Test programmes Fehler Flow sensor Appliance config. Pumpe/Wassermangel Back Back Select Installer level Test programmes Gas type check Fault list Gas type check...
  • Page 39 Operation Appliance config. Comfort operation Target flow temp. Comfort on DHW temperature Comfort mode Cancel Back Select Appliance config. D.026 D.026 DHW temperature Auxiliary relay Zusatzrelais Comfort mode Auxiliary relay Circulation pump externe Pumpe Back Select Back Cancel Appliance config. D.027 D.027 Comfort mode...

  • Page 40: Commissioning

    Commissioning Commissioning each time the unit is switched on until all steps have been completed successfully. At the time of commissioning, complete all relevant sec- You must confirm the start of the installation assistant. tions of the benchmark checklist found within the back Once confirmed, all of the heating and hot water require- pages of this document.

  • Page 41: Target Feed Temperature

    The heating partial load of the Vaillant ecoTEC plus boiler is can also call up the "Appliance configuration" menu point. factory set to "auto". This means that the boiler independ- Menu ¬ Installer level ¬ Appliance configuration...

  • Page 42: Preparing The Heating Water

    Commissioning If the boiler is in error condition, you cannot Display Meaning start any test programs. You can detect an error P.00 Purging test program condition by the fault symbol shown in the left The heating circuit and the hot water circuit are purged bottom corner of the display (fig.

  • Page 43: Filling The Heating Installation

    Commissioning 10.7.1 Filling the heating installation If the heating installation extends over several storeys, higher filling pressures may be required to avoid air enter- ing the heating installation. Ensure that the filling and drainage tap on the > Remove the front casing from the boiler heating installation is connected to a cold water (¬ section 4.8).

  • Page 44: Flushing The System For The First Time ("Cold")

    Commissioning 10.7.3 Flushing the system for the first time 10.9 Topping up the VUI boiler using a filling ("cold") device The entire heating system must be flushed through completely at least twice: once cold and once hot, in accordance with the following instructions.

  • Page 45: Filling The Condensate Siphon

    Commissioning 10.11 Filling the condensate siphon 10.12 Checking the gas ratio setting Danger! Caution. Risk of poisoning from escaping flue gas! Risk of material damage caused by mak- An empty or insufficiently filled condensate ing unauthorised settings. siphon may allow flue gas to escape into Modifications to the gas pressure regulator the room air.

  • Page 46: Checking For Tightness Of The Flue Gas Installation And Flue Gas Recirculation

    10.12.2 Checking for tightness of the flue gas local gas family: installation and flue gas recirculation > Call Vaillant Service Solutions (0870 6060 777); Gas > Check the integrity off the flue gas installation according conversions must only be carried out by Vaillant Service Solutions.

  • Page 47: Checking The Gas Flow Rate

    If the measured gas flow rate lies outside the tolerance lim- its specified in ¬ tab. 10.2, do not operate the boiler and inform the Vaillant Service Solutions (0870 6060 777). If the measured gas flow rate is within the tolerance limits shown in ¬...

  • Page 48: Carrying Out A Full Function Test

    > Start up the boiler in accordance with the relevant oper- Vaillant Service Solutions (0870 6060 777) and proceed as follows: ating instructions. > Take the boiler out of operation by If you have still not successfully completed the installation –...

  • Page 49: Checking The Heating Mode

    Commissioning 10.13.1 Checking the heating mode 10.13.3 Checking the cylinder charging > Switch on the boiler. > Make sure that there is a heat requirement. Cylinder charging is deactivated ex-works and > Activate the Live monitor (¬ section 13.2.1). must be activated during initial commissioning. The cylinder charging of the layered storage tank is only S.04 active if Comfort mode is switched on.

  • Page 50: Final Flush Of The Heating System ("Hot")

    Adapting the boiler to the heating installation Adapting the boiler to the heating S.24 installation DHW mode Burner on The installation assistant is started when the boiler is switched on for the first time (¬ section 10.2). If you have already filled the heating installation and termi- Back nated the installation assistant, but wish to set the most important system parameters again, you can also call up...
  • Page 51 Adapting the boiler to the heating installation Factory set- Your own Code Parameters Adjustable values ting setting D.000 Heating partial load Adjustable heating partial load in kW Auto Auto: Boiler automatically adjusts max. partial load to cur- rent system demand D.001 Overrun time of internal heating pump 1 - 60 min...
  • Page 52 Relay with PWM with disable facility disable facility D.047 Outside temperature (with weather-con- Actual value in °C Not adjustable trolled Vaillant controller) D.050 Offset for minimum speed In rpm, setting range: 0 to 3000 Nominal value set in factory D.051...
  • Page 53 Adapting the boiler to the heating installation Factory set- Your own Code Parameters Adjustable values ting setting D.058 Activation of solar post-heating for VUW Solar post-heating mode deactivated Solar post- boilers; Hot water activation target value minimum 60 °C heating mode Switch hot water mode deactivated D.060...

  • Page 54: Setting The Heating Partial Load

    Setting the heating partial load Comfort (continuously operating pump) The heating partial load of the Vaillant ecoTEC plus boiler is The internal pump is switched on when the heating flow factory set to "auto". This means that the boiler automati- temperature is not at "Heating off"(¬ Operating instruc-...

  • Page 55: Setting The Maximum Flow Temperature

    Adapting the boiler to the heating installation Eco (intermittently operating pump) 11.1.5 Burner anti-cycling time Pump operating mode Eco is the factory setting. This pump operating mode is useful for removing residual heat after Setting the burner anti-cycling time hot water generation when the heat demand is extremely low and large temperature spreads exist between the hot To prevent frequent switching on and off of the burner and water generation and heating mode target values.

  • Page 56: Setting The Maintenance Interval

    Adapting the boiler to the heating installation 1st option 11.1.7 Setting the pump output Menu ¬ Reset burner anti-cycling time The current burner anti-cycling time appears in the display. The ecoTEC plus boiler is equipped with a two-stage pump. > Confirm the reset of the burner anti-cycling time by The output of the two-stage pump can be adjusted to the pressing the right-hand selection button requirements of the heating installation.

  • Page 57: Handing Over The Boiler To The Operator

    It is strongly recommended that a maintenance contract be taken out to ensure regular maintenance. Important information is available from Vaillant Service Solutions (0870 6060 777). > Complete the Benchmark gas boiler commissioning checklist which is found at the end of these instructions.

  • Page 58: Inspection And Maintenance

    You must carry out an annual inspection of the Vaillant eco- fere with the operational safety of the TEC. boiler and can result in damage to property The annual inspection can be effectively performed without and to persons.

  • Page 59: General Inspection And Maintenance Instructions

    > Further check for electrical isolation of the appliance by To ensure the faultless operation, long term availability of all functions and long working life of your Vaillant boiler use of a test meter. > Close the gas isolation valve.

  • Page 60: Adjusting The Co Concentration (Or The Air Ratio)

    Inspection and maintenance 12.1 Measuring the CO concentration The boiler is fitted with a flue gas analysis point (1). A suitable flue gas analyser can be con- nected to this point to establish the combustion performance of the boiler. 12.2 Removing the covering cap for the air ratio setting adjust- ing screw (gas ratio setting) and making the air ratio set- >...

  • Page 61: Performing The Gas Family Check

    ¬ tab. 12.1, call point in Venturi blocked (do not the Vaillant Service Solutions (0870 use lubricants on O-ring in Ven- 6060 777). turi.), recirculation, faulty seal. > Do not start up the boiler! >...

  • Page 62: Inspection And Maintenance Work Steps

    Inspection and maintenance 12.2 Inspection and maintenance work steps Column 1 Column 2 Inspection Maintenance No. Activity must be car- must be car- ried out each ried out at reg- year ular intervals Check the air flue gas installation for leaks and for proper fixation and ensure it is not blocked or damaged and is fitted correctly, complying with the relevant installation instructions.

  • Page 63: Filling The Boiler And The Heating Installation

    Inspection and maintenance 12.2.1 Filling the boiler and the heating Display Test programs Action installation T.01 Check internal You can switch the internal pump on pump and off. A description of how to fill the boiler and the heating instal- T.02 Check 3-way You can move the diverter valve to...
  • Page 64 Inspection and maintenance > Close the service valves on the boiler. > Remove the front casing from the boiler (¬ section 4.8). > Fold the electronics box forwards (¬ section 8.2). 12.4 Removing the compact thermal module The plugs on the fan motor and the Venturi have 12.3 Remove the air intake pipe latching lugs with which they engage in the slot.

  • Page 65: Cleaning The Heat Exchanger

    Inspection and maintenance 12.4.2 Cleaning the heat exchanger 12.4.3 Checking the burner Caution. Risk of damage from water spray. If you fail to protect the electronics box adequately, water can penetrate the box during cleaning and may damage the elec- tronics.

  • Page 66: Cleaning The Condensate Siphon

    Inspection and maintenance 12.4.4 Cleaning the condensate siphon 12.4.5 Cleaning the filter in the cold water inlet There is a filter in the cold water inlet of the boiler which Danger! must be cleaned during maintenance work. Risk of death caused by improper main- tenance.

  • Page 67: Installing The Compact Thermal Module

    Inspection and maintenance 12.4.6 Installing the compact thermal module Danger! Risk of death and risk of damage caused by hot flue gas! If you do not renew the seal and the self- locking nuts on the burner door, hot flue gases may escape and cause personal injury and material damage.

  • Page 68: Checking The Pressure Of The Expansion Vessel On The Boiler

    Inspection and maintenance 12.4.7 Checking the pressure of the expansion 12.4.8 Check the pressure of the expansion vessel vessel on the boiler on the layered storage tank One check every three years is sufficient. > Close the stop valve on the hot water system. >...

  • Page 69: Troubleshooting

    Heating, no heat demand 6060 777) S.01 Heating mode fan start-up S.02 Heating mode pump flow > If you contact Vaillant Service Solutions (0870 6060 S.03 Heating mode, ignition 777) or your Vaillant service partner, if possible, please S.04 Heating mode, burner on mention S.05...

  • Page 70: Service Messages

    The mainte- curs despite having carried out several fault clearance nance symbol appears if you have set a maintenance inter- attempts, contact Vaillant Service Solutions (0870 6060 val, for example, (¬ section 11.1.6) and it has elapsed. The 777).

  • Page 71: Overview Of Fault Codes

    Troubleshooting 13.2.8 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.02...
  • Page 72 Troubleshooting Code Meaning Cause F.49 eBUS fault Short circuit on eBUS, eBUS overload or two power supplies with different polarities on the eBUS F.52 Mass flow sensor connection fault Mass flow sensor not connected/disconnected, plug not connected or incorrectly connected F.53 Mass flow sensor fault Mass flow sensor faulty, filter below Venturi filter cap wet or blocked,...

  • Page 73: Using The Function Menu

    Troubleshooting Code Meaning Cause F.83 Flow and/or return temperature sensor tempera- When the burner starts, the temperature change registered at the flow ture change fault and/or return temperature sensor is non-existent or too small. - Not enough water in the boiler - Flow and/return temperature sensor not in correct position at pipe.

  • Page 74: Replacing Components

    The work described in this section must only be carried out by a competent person. route (¬ section 12.1.5). > Only use genuine Vaillant spare parts for repairs . Caution. An overview of the available genuine Vaillant spare parts Operating fault or a reduction in the can be obtained: working life of the boiler.

  • Page 75: Replacing The Fan

    Replacing components 14.3 Replacing the fan 14.3 Removing the gas valve and Venturi from fan > Remove the entire fan/Venturi/gas valve unit from the 14.2 Removing the fan boiler. > Remove the air intake pipe (¬ section 12.4.1). > Unscrew the fixing screw (2, ¬ fig. 14.3) of the gas valve >...

  • Page 76: Replacing The Gas Valve

    Replacing components 14.4 Replacing the gas valve Caution. Risk of material damage caused by mak- ing unauthorised settings. Modifications to the gas pressure regulator of the gas valve may destroy the gas valve and cause operating faults on the boiler. >...

  • Page 77: Replacing The Venturi Including The Mass Flow Sensor

    Replacing components 14.5 Replacing the Venturi including the mass The plug on the Venturi has latching lugs with flow sensor which it engages in the slot. You have to release the latching lug by pushing it in to pull off the plug.

  • Page 78: Replacing The Expansion Vessel

    Replacing components > Remove the gas connecting pipe (1, ¬ fig. 14.10) from the 14.6 Replacing the expansion vessel Venturi (2 ¬ fig. 14.10) by detaching the clamp (3, > Drain the boiler (¬ section 12.2.2). ¬ fig. 14.10) and pulling out the gas connecting pipe ver- tically. Dispose of the seal (6, ¬ fig. 14.10). >...
  • Page 79 Replacing components Caution. Risk of damage to the boiler. Mineral oil-based lubricants may damage the seals. The seals must therefore not be lubricated. > Only use water or commercially available soft soap, if necessary, to assist with the installation. With the new heat exchanger, ensure that you use the cable with the coding resistor and the correct plug.

  • Page 80: Replacing The Expansion Vessel Of The Layered Storage Tank

    Replacing components 14.8 Replacing the expansion vessel of the layered storage tank > Close the cold water stop valve. > Open a hot water valve to depressurise the water circuit. Close the hot water valve. > Unscrew the bolt from the cover of the layered storage tank.

  • Page 81: Replacing The Impeller Sensor On The Layered Storage Tank

    Replacing components 14.10 Replacing the impeller sensor on the 14.11 Replacing the PCB and/or the display layered storage tank > Close the stop valve on the hot water system and drain Danger! Risk of death from electric shock! the boiler and layered storage tank on the hot water Mains connection terminals L and N remain side.

  • Page 82: Replacing Either The Display Or The Pcb On The Boiler

    Replacing components 14.11.1 Replacing either the display or the PCB on 14.11.2 Replacing the PCB and the display on the the boiler boiler at the same time > Replace the PCB or display according to the assembly Setting the language and unit type and installation instructions supplied.

  • Page 83: Replacing The Pcb On The Layered Storage Tank

    Decommissioning Decommissioning 14.11.3 Replacing the PCB on the layered storage tank > Comply with the assembly and installation manuals pro- 15.1 Temporarily shutting down the boiler vided with the spare parts. > Unscrew the bolt from the cover of the layered storage tank and remove the cover.

  • Page 84: Disposing Of The Boiler

    Guarantee and customer service Guarantee and customer service 15.3 Disposing of the boiler The Vaillant ecoTEC plus VUI 937 with layered storage tank onsists primarily of materials that can be recycled. 16.1 Factory guarantee The boiler and its accessories must not be disposed of with household waste.

  • Page 85: Technical Data

    89.4 Boiler dimensions (H x W x D) 720 x 440 x 601 Mounting weight approx. Electrical connection V/Hz 230/50 Built-in fuse 2 A, slow-blow 17.1 Technical data for ecoTEC plus VUI boiler Installation and maintenance instructions ecoTEC plus 0020134833_01...
  • Page 86 Capacity of the layered storage tank Weight of the layered storage tank Operating weight of the boiler and layered storage tank (filled with water) 17.1 Technical data for ecoTEC plus VUI boiler (continued) Installation and maintenance instructions ecoTEC plus 0020134833_01...

  • Page 87: Glossary

    Digital information and analysis system (DIA) An air/flue gas duct is a line system with two separate flow The Vaillant ecoTEC plus boiler is fitted with a digital infor- channels. The flue gas is routed into separate chambers at mation and analysis system (DIA). If additional settings are...

  • Page 88: Appendix

    Appendix Appendix Installation, Commissioning and Service Record Installation and maintenance instructions ecoTEC plus 0020134833_01...

  • Page 89: Benchmark Log Book

    Please affix the label from the Benchmark Log Book rear cover of the control box over this area. 20 Benchmark Log Book Installation and maintenance instructions ecoTEC plus 0020134833_01...
  • Page 90 0020008345-06 SERVICE INTERVAL RECORD Benchmark Log Book It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below . Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the boiler manufacturer’s instructions.

  • Page 91: Ec Declaration Of Conformity

    EC declaration of conformity EC declaration of conformity Installation and maintenance instructions ecoTEC plus 0020134833_01...

  • Page 92: Index

    Index Index Accessories..................13 Diagnostics codes ........... 50, 51, 52, 53 Air/flue gas duct ..............27, 87 DIA system..................87 Air/flue gas system..............27 Disposal Article numbers ................5 Boiler ..................84 Auxiliary relay..............34, 41, 52 Packaging ................. 14 Domestic hot water cylinder ............
  • Page 93 Index Heating mode ................49 Removing Heating partial load ..............41 Boiler display ................81 Heating water Boiler PCB ................81 Preparation ................10 Burner ..................74 Compact thermal module ............ 63 Expansion vessel on the boiler .......... 78 Fan ..................75, 76 Front casing ................
  • Page 96 0020134833 Supplier Manufacturer...

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