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Vaillant ecoFIT sustain 418 User Manual

Vaillant ecoFIT sustain 418
52 pages
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en Installation and maintenance instructions
ecoFIT sustain
415 - 430
0020277262_02 - 29.07.2020

Table of Contents

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Vaillant ecoFIT sustain 418 Specifications

General IconGeneral
Product TypeGas Boiler
Output Power18 kW
Efficiency94%
ErP space heating efficiency classA
ErP water heating efficiency classA
Efficiency (%)94%
Fuel TypeNatural Gas
MountingWall-mounted
Maximum Flow Temperature80°C
Maximum Working Pressure3 bar

Summary

Safety

General Safety Information

Conveys vital safety information to prevent death, injury, material damage, or environmental harm.

Electrical, Flue Gas, and Material Safety

Electrical, Flue Gas, and Material Safety

Covers electrical safety, flue gas hazards, and precautions for flammable substances and high temperatures.

Functional Elements and Safety Features

Safety Devices

Details electrical failure, overheating, frost protection, and condensate drain safety features.

Installation Site and Clearances

Air/Flue Pipe Regulations

Air/Flue Terminal Positioning

Air/Flue Terminal Positioning

Provides guidance and diagrams for positioning air/flue terminals according to standards.

Installation Steps

Installation Preparation and Heating Pump

Pre-installation checks, preparing the system, and installing the heating pump.

Open Heating System Connection

Details connecting the boiler to an open heating system with expansion vessel.

Sealed System and Pipe Connections

Gas and Condensate Connections

Gas Connection

Steps for establishing a secure and compliant gas connection to the boiler.

Flue and Electrical Installation

Electrical Installation Basics

Safety and procedures for electrical connections, opening the electronics box.

Establishing Power Supply and Controls

Establishing Power Supply and Controls

Steps for power supply connection and wiring external controls to the electronics.

Product Operation

Start-up Procedures

Initial Start-up and Water Quality

Performing initial start-up and checking/treating heating water quality.

Filling and Gas Setting Checks

Filling and Gas Setting Checks

Filling the installation, condensate trap, and checking gas settings.

Gas Pressure and CO2 Checks

Gas Pressure and CO2 Checks

Verifying gas connection pressure and CO2 content for correct operation.

Heating Mode and Configuration

Inspection and Maintenance

Heat Exchanger and Burner Checks

Troubleshooting Common Issues

Faults and Fault Memory Management

Procedures for eliminating faults and accessing/clearing the fault memory.

Replacing Key Components

PCB Replacement and Leak-Tightness

Appendix: Diagnostics Codes

Appendix: Fault Codes

Appendix: Fault Codes

Lists fault codes and their potential causes for troubleshooting.

Wiring Diagram

Wiring Diagram (30 kW)

Commissioning Checklist

Commissioning Checklist

Checklist for boiler installation, commissioning, and warranty validation.

Commissioning Flow Chart

Commissioning Flow Chart

A step-by-step flowchart for the boiler commissioning process.

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