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Vaillant ecoTEC plus VUW 6/5-5 Series User Manual

Vaillant ecoTEC plus VUW 6/5-5 Series
80 pages
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en Installation and maintenance instructions
ecoTEC plus
VU, VUW ..6/5-5
0020244997_07 - 15.07.2021

Table of Contents

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Vaillant ecoTEC plus VUW 6/5-5 Series Specifications

General IconGeneral
MountingWall-mounted
Efficiency94%
ErP Heating Efficiency ClassA
ErP Water Heating Efficiency ClassA
Hot Water Flow Rate14.5 l/min
Fuel TypeNatural Gas
Dimensions (H x W x D)720 mm x 440 mm x 338 mm
Warranty5 years
TypeCombination boiler

Summary

Installation and Maintenance Instructions

Technical Data

Technical Data – General

General technical specifications and data for the product range.

Safety

1.2 Qualification

Specifies the required professional training and competencies for installation and maintenance.

1.3 General Safety Information

Covers essential safety topics including gas, flue gas, electrical, and environmental hazards.

Product Description

5.7 Safety Devices

Explains various safety devices and their functions.

Set-up

6.6.2 Air/Flue Terminal Position

Diagrams and tables specifying safe positioning of the air/flue terminal.

6.6.2.2 Horizontal Terminal Positioning

Recommendations for horizontal flue terminal placement and considerations for condensate plume.

6.3 Installation Site

Guidelines for selecting a suitable installation location, including zone requirements.

6.6.2.1 Terminal Positioning (Fan-Supported Flue)

Detailed table of clearances for flue terminal positioning based on installation site.

6.4 Minimum Clearances

Table detailing required minimum clearances around the product.

6.6 Air/Flue Pipe

Information and regulations concerning the air/flue pipe system.

6.6.1 Regulation

General regulations and considerations for air/flue gas systems and terminal positioning.

Installation

7.1 Installation Requirements

Requirements before starting the installation process.

7.11 Flue Installation

Instructions for installing the air/flue pipe and its terminal.

7.12.3 Establishing Power Supply

Steps for correctly connecting the product to the power supply.

7.12.5 Connecting Controls to Electronics

How to connect external controls, thermostats, and other devices to the electronics.

7.12 Electrical Installation

Essential safety and procedural information for electrical installation.

7.2 Preparing for Installation

Steps and components required before proceeding with installation.

Operation

8.2 Installer Level Access

Steps for accessing the installer level for configuration and diagnostics.

8.4 Setting Hot Water Temperature

Instructions for setting the hot water temperature, including Legionella prevention warning.

Start-up

9.1 Initial Start-up Procedure

Procedures for initial start-up, including the Benchmark Checklist.

9.6 Gas Family Check

Procedure for performing a gas family check to ensure correct combustion quality.

9.12 Filling the Heating Installation

Step-by-step guide for filling the heating installation with water.

9.15.5 CO2 & CO/CO2 Ratio Check

Procedure for checking and adjusting CO2 content and CO/CO2 ratio.

9.13 Purging the Heating Installation

Instructions on how to purge air from the heating installation.

9.15 Gas Inspection

Procedures for inspecting and verifying gas settings.

9.17 Leak-Tightness Check

How to check the product and connections for leak-tightness.

9.3 Installation Assistants

How the installation assistant guides the setup process and its features.

9.8 Heating Water Quality Check

Procedures for checking and treating heating water quality and hardness.

9.11 First Time Cold Flushing

Detailed steps for flushing the heating system for the first time.

Adapting Unit to Heating Installation

Handing Over to the End User

Inspection and Maintenance

12.3 Inspection and Maintenance

General requirements and checks for annual inspection and maintenance.

12.18 Completing Inspection and Maintenance Work

Final steps after maintenance, including test operation and records.

Troubleshooting

13.1 Checking Service Messages

How to check for and interpret service messages.

13.6 Replacing Defective Components

General section on replacing faulty components.

13.6.3 Replacing the Gas Valve Assembly

Procedures for replacing the gas valve assembly.

13.6.5 Replacing the Heat Exchanger

Step-by-step guide for replacing the heat exchanger.

13.6.6 Replacing the Expansion Vessel

Instructions for removing and installing a new expansion vessel.

13.2 Eliminating Faults

Procedures for identifying and rectifying faults using tables and menus.

13.6.1 Replacing the Burner

Step-by-step guide for replacing the burner.

13.6.4 Replacing the Venturi

Instructions for replacing the Venturi and associated parts.

13.6.7 Replacing the PCB or Display

Procedures for replacing the PCB or the display unit.

13.3 Fault Memory Access

How to access, view, and clear the stored fault memory.

13.6.2 Replacing the Fan

Instructions for replacing the fan assembly.

13.6.8 Replacing PCB and Display

Steps for replacing PCB and display, including setting device-specific number.

Appendix

A Inspection and Maintenance Work

Table detailing required inspection and maintenance tasks and intervals.

C Overview of Diagnostics Codes

Explains the meaning and use of various diagnostics codes.

Status Codes - Overview

Overview of Fault Codes

Check Programmes – Overview

Wiring Diagrams

H.1 Wiring Diagram (Heating Only, 12-35 kW)

Electrical wiring diagram for heating-only models (12-35 kW).

H.2 Wiring Diagram (Heating Only, ≥ 37 kW)

Electrical wiring diagram for heating-only models (≥ 37 kW).

H.3 Wiring Diagram (DHW Integrated, 12-35 kW)

Electrical wiring diagram for DHW models (12-35 kW).

H.4 Wiring Diagram (DHW Integrated, ≥ 37 kW)

Electrical wiring diagram for DHW models (≥ 37 kW).

Commissioning Checklist

Gas Boiler System Commissioning Checklist & Warranty Validation Record

Service & Interim Boiler Work Record

Commissioning Flow Chart

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