Vaillant ecoTEC plus 837 Service Manual Page 1

Installation and maintenance instructionsFor the competent personGB, IEInstallation and maintenance instructionsecoTEC plusVU VUW

10 Installation and maintenance instructions ecoTEC plus 0020116700_06 aSafetya2"Small Bore" and "Micro Bore" central heating inst

Description of the applianceInstallation and maintenance instructions ecoTEC plus 0020116700_06 1133 Description of the applianceDesign6789121011131

Installation12 Installation and maintenance instructions ecoTEC plus 0020116700_06 44 Installationi BEFORE PROCEEDING - ENSURE BOILER IS CORRECT FOR

InstallationInstallation and maintenance instructions ecoTEC plus 0020116700_06 134Item Qty Description1 1 Wall bracket2 1 Boiler3 1 Lower cover4 4 S

Installation14 Installation and maintenance instructions ecoTEC plus 0020116700_06 4 > If removing boiler from truck straddle the load and tilt for

InstallationInstallation and maintenance instructions ecoTEC plus 0020116700_06 154 > Always use assistance if required. > Recommend wear suita

Installation16 Installation and maintenance instructions ecoTEC plus 0020116700_06 44.4.2 Using installation templates An installation template is su

InstallationInstallation and maintenance instructions ecoTEC plus 0020116700_06 1744.5 Dimension drawing and connection measurements 7202035 35624B1

Installation18 Installation and maintenance instructions ecoTEC plus 0020116700_06 44.6 Wall-mounting the boiler a Danger!Risk of death if the load-

Installation and maintenance instructions ecoTEC plus 0020116700_06 194Installation4.8 Removing/fitting the side panel You can also remove a side

Table of Contents2 Installation and maintenance instructions ecoTEC plus 0020116700_06 Table of Contents1 Notes on the documentation ...

Gas installation20 Installation and maintenance instructions ecoTEC plus 0020116700_06 55 Gas installationThe work described in this section must only

Hydraulic installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 2166 Hydraulic installationThe work described in this sect

Hydraulic installation22 Installation and maintenance instructions ecoTEC plus 0020116700_06 66.2 Connecting the hot and cold water (VUWboiler)6.1

Hydraulic installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 2366.5 Low loss header A low loss header disconnects the b

Hydraulic installation24 Installation and maintenance instructions ecoTEC plus 0020116700_06 6 > Insert a seal (1) in the cap nut (2). > Screw t

Flue gas installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 2577 Flue gas installation 7.1 Air/flue gas duct a Danger

Flue gas installation26 Installation and maintenance instructions ecoTEC plus 0020116700_06 77.2 Flue terminationThe following details refer to all fl

Flue gas installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 277LocationMinimumdimensionsADirectly below an opening, air

Electrical installation28 Installation and maintenance instructions ecoTEC plus 0020116700_06 88 Electrical installation8.1 Preparing for installati

Electrical installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 298b Caution.Risk of damage caused by incorrect installati

Table of Contents3Installation and maintenance instructions ecoTEC plus 0020116700_06 10.7 Filling and purging the heating installation ...

Electrical installation30 Installation and maintenance instructions ecoTEC plus 0020116700_06 88.4.2 Connecting controllers to the electronic systemb

Electrical installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 318 > Perform the wiring in the same way as in ¬sectio

Electrical installation32 Installation and maintenance instructions ecoTEC plus 0020116700_06 88.7 Connection diagramsCirculation pump remote contro

Electrical installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 338Circulation pump remote control1DCF connectionEarthEart

Electrical installation34 Installation and maintenance instructions ecoTEC plus 0020116700_06 8Circulation pump remote control1DCF connectionEarthEart

Electrical installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 358Circulation pump remote control1DCF connectionEarthEart

Operation36 Installation and maintenance instructions ecoTEC plus 0020116700_06 99 OperationThe Vaillant ecoTEC plus boiler is fitted with a digital i

OperationInstallation and maintenance instructions ecoTEC plus 0020116700_06 3799.2 Overview of the menu structureMenuInstaller levelReset burner o

Operation38 Installation and maintenance instructions ecoTEC plus 0020116700_06 9Target flow temp.Appliance config.DHW temperatureComfort modeBack Sel

CommissioningInstallation and maintenance instructions ecoTEC plus 0020116700_06 391010 Commissioning At the time of commissioning, complete all rele

Notes on the documentation4 Installation and maintenance instructions ecoTEC plus 0020116700_06 11 Notes on the documentationThe following instructio

Commissioning40 Installation and maintenance instructions ecoTEC plus 0020116700_06 1010.2.4 Target feed temperatureUse the minus button and the plus

CommissioningInstallation and maintenance instructions ecoTEC plus 0020116700_06 4110Display MeaningP.00 1)Purging test programThe heating circuit an

Commissioning42 Installation and maintenance instructions ecoTEC plus 0020116700_06 10If the heating installation extends over several storeys, higher

CommissioningInstallation and maintenance instructions ecoTEC plus 0020116700_06 4310 > Refill the heating system with water, as described in (¬s

Commissioning44 Installation and maintenance instructions ecoTEC plus 0020116700_06 10110.4 Filling the condensate siphon > Remove the lower part

CommissioningInstallation and maintenance instructions ecoTEC plus 0020116700_06 4510flue gas and air measurements on this boiler - for details see s

Commissioning46 Installation and maintenance instructions ecoTEC plus 0020116700_06 101210.7 Measuring the gas inlet working pressure > Undo the s

CommissioningInstallation and maintenance instructions ecoTEC plus 0020116700_06 471010.12 Carrying out a full function test > After completing

Adapting the boiler to the heating installation48 Installation and maintenance instructions ecoTEC plus 0020116700_06 11also explained by the plain te

Adapting the boiler to the heating installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 4911Code Parameters Adjustable val

Notes on the documentationInstallation and maintenance instructions ecoTEC plus 0020116700_06 51and fully explained at hand over to the operator of t

Adapting the boiler to the heating installation50 Installation and maintenance instructions ecoTEC plus 0020116700_06 11Code Parameters Adjustable val

Adapting the boiler to the heating installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 5111Code Parameter Adjustable valu

Adapting the boiler to the heating installation52 Installation and maintenance instructions ecoTEC plus 0020116700_06 11Code Parameter Adjustable valu

Adapting the boiler to the heating installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 5311Eco (intermittently operating

Adapting the boiler to the heating installation54 Installation and maintenance instructions ecoTEC plus 0020116700_06 11Reset remaining burner anti-cy

Adapting the boiler to the heating installationInstallation and maintenance instructions ecoTEC plus 0020116700_06 5511Position of the setting screw

Inspection and maintenance56 Installation and maintenance instructions ecoTEC plus 0020116700_06 1212 Inspection and maintenanceAfter servicing, comp

Inspection and maintenanceInstallation and maintenance instructions ecoTEC plus 0020116700_06 5712During any inspection and maintenance or after chan

Inspection and maintenance58 Installation and maintenance instructions ecoTEC plus 0020116700_06 12112.1 Measuring the CO2 concentrationi The boile

Inspection and maintenanceInstallation and maintenance instructions ecoTEC plus 0020116700_06 5912SettingsUnit Natural gas (H) PropaneCO2 after 5 min

6 Installation and maintenance instructions ecoTEC plus 0020116700_06 aSafetya22 Safety2.1 Safety and warning information > When installing the ec

Inspection and maintenance60 Installation and maintenance instructions ecoTEC plus 0020116700_06 1212.2 Inspection and maintenance work stepsNo. Acti

Inspection and maintenanceInstallation and maintenance instructions ecoTEC plus 0020116700_06 611212.2.1 Filling the boiler and the heating installa

Inspection and maintenance62 Installation and maintenance instructions ecoTEC plus 0020116700_06 12 > Close the service valves on the boiler. >

Inspection and maintenanceInstallation and maintenance instructions ecoTEC plus 0020116700_06 631212.4.2 Cleaning the heat exchangerb Caution.Risk o

Inspection and maintenance64 Installation and maintenance instructions ecoTEC plus 0020116700_06 12112.7 Cleaning the condensate siphon > Remove t

Inspection and maintenanceInstallation and maintenance instructions ecoTEC plus 0020116700_06 651212435987612.10 Installing the compact thermal modu

Troubleshooting66 Installation and maintenance instructions ecoTEC plus 0020116700_06 1313 Troubleshooting13.1 Contact Vaillant Service Solutions (08

TroubleshootingInstallation and maintenance instructions ecoTEC plus 0020116700_06 6713Display MeaningS.62 Gas family check unsuccessful: CO/CO2 valu

Troubleshooting68 Installation and maintenance instructions ecoTEC plus 0020116700_06 1313.2.8 Overview of fault codesCode Meaning CauseF.00 Flow tem

TroubleshootingInstallation and maintenance instructions ecoTEC plus 0020116700_06 6913Code Meaning CauseF.49 eBUS fault Short circuit on eBUS, eBUS

Installation and maintenance instructions ecoTEC plus 0020116700_06 7aSafetya2Installation and settingsIn the following cases, the boiler must be ope

Troubleshooting70 Installation and maintenance instructions ecoTEC plus 0020116700_06 13Code Meaning CauseF.93 Gas group fault Combustion quality outs

Replacing componentsInstallation and maintenance instructions ecoTEC plus 0020116700_06 711414 Replacing componentsThe work described in this section

Replacing components72 Installation and maintenance instructions ecoTEC plus 0020116700_06 1414.3 Replacing the fan423157614.2 Removing the fan >

Replacing componentsInstallation and maintenance instructions ecoTEC plus 0020116700_06 7314 > Replace the defective fan.4132514.5 Installing the

Replacing components74 Installation and maintenance instructions ecoTEC plus 0020116700_06 14i The plug on the venturi has latching lugs with which i

Replacing componentsInstallation and maintenance instructions ecoTEC plus 0020116700_06 7514b Caution.Risk of damage to boiler and possible malfuncti

Replacing components76 Installation and maintenance instructions ecoTEC plus 0020116700_06 14123414.13 Heat exchanger brackets > Disconnect the pl

Replacing componentsInstallation and maintenance instructions ecoTEC plus 0020116700_06 771414.8.1 Replacing either the display or the PCB > Repl

Decommissioning78 Installation and maintenance instructions ecoTEC plus 0020116700_06 1515 Decommissioning15.1 Temporarily shutting down the boilerb

Technical dataInstallation and maintenance instructions ecoTEC plus 0020116700_06 791717 Technical dataecoTEC plus Unit612 (VU GB126/5-5)615 (VU GB1

8 Installation and maintenance instructions ecoTEC plus 0020116700_06 aSafetya22.5 General requirements2.5.1 Related documentsTo ensure the safe insta

Technical data80 Installation and maintenance instructions ecoTEC plus 0020116700_06 17ecoTEC plus Unit824 (VUW GB246/5-5)831 (VUW GB316/5-5)837 (VUW

GlossaryInstallation and maintenance instructions ecoTEC plus 0020116700_06 811818 GlossaryAir/flue gas duct An air/flue gas duct is a line system w

© Heating and Hotwater Industry Council (HHIC)www.centralheating.co.ukBenchmark Commissioning and Servicing SectionIt is a requirement that the boiler

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PRIOR TO CO AND COMBUSTION RATIO CHECKThe boiler manufacturer’s installation instructions should have been followed, gas type verified and gas supply

Index86 Installation and maintenance instructions ecoTEC plus 0020116700_06 IndexAAccessories...

Index87Installation and maintenance instructions ecoTEC plus 0020116700_06 HHeating mode ...

0020116700_06 GBIE 012014 – Subject to changeManufacturerSupplier

Installation and maintenance instructions ecoTEC plus 0020116700_06 9aSafetya2b Caution.Risk of damage caused by aggressive vapours and dust.Aggressi