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Baxi Neta-tec Combi 28 GA User Manual

Baxi Neta-tec Combi 28 GA
32 pages
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© Baxi Heating UK Ltd 2012
Neta-tec Combi GA Range
Gas Fired Wall Mounted Condensing
Combination Boiler
Installation & Servicing Instructions
These instructions include the Benchmark Commissioning Checklist
and should be left with the user for safe keeping.
They must be read in conjunction with the Flue Installation Guide.
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Baxi Neta-tec Combi 28 GA Specifications

General IconGeneral
BrandBaxi
ModelNeta-tec Combi 28 GA
CategoryBoiler
LanguageEnglish

Summary

Installer Notification Guidelines

Competent Person's Self Certification Scheme

Details the process for installers using self-certification schemes for building regulations compliance.

Building Control

Explains the process for notifying Local Authority Building Control departments for compliance.

Legislation

IMPORTANT - Installation, Commissioning, Service & Repair

Critical instructions for safe and compliant installation, commissioning, service, and repair of the appliance.

Codes of Practice

Lists relevant British and Irish codes of practice for gas and heating system installations.

Safe Manual Handling

General

Provides general advice and responsibilities for safe handling and lifting of the boiler.

Preparation

Outlines necessary preparation steps to ensure safe handling and minimize risks during movement.

Technique

Details safe techniques for lifting and handling the boiler to prevent injury.

Remember

Key reminders and advice on assessing risks and stopping if injury is felt during handling.

Introduction

1.1 Description

Provides a description of the Baxi Neta-tec Combi GA Range boilers and their capabilities.

1.2 Optional Extras

Mentions availability of optional accessories like timers and external controls for the boiler.

1.3 Contents of Pack

Lists the items included within the boiler's packaging, such as the boiler unit and literature.

General Layout

2.1 Layout

Details the internal layout and identifies key components of the boiler with a diagram.

Appliance Operation

3.1 Central Heating Mode

Explains how the boiler operates to provide central heating, including pump overrun and anti-cycling.

3.2 Domestic Hot Water Mode

Describes the operation for domestic hot water, highlighting priority and the diverter valve function.

3.3 Boiler Frost Protection Mode

Details the boiler's integral frost protection mode and its activation conditions.

3.4 Pump Protection

Explains the automatic pump operation for protection against sticking during inactivity.

Technical Data

4.1

Presents comprehensive technical specifications, including heat outputs, pressures, dimensions, and electrical data.

Dimensions and Fixings

Dimensions

Provides detailed dimensions and clearance requirements for boiler installation with diagrams.

Fixings

Shows the layout and sizes for pipe connections on the wall plate for installation.

System Details

6.1 Information

Provides information regarding water byelaws compliance and relevant IRN notes for system installation.

6.2 Treatment of Water Circulating Systems

Details the importance of system flushing and water treatment to prevent corrosion and maintain warranty.

6.3 Bypass

Explains the boiler's integral automatic bypass and when an external bypass might be needed.

6.4 System Control

Discusses the necessity of external controls for optimizing boiler operation and energy efficiency.

6.5 System Filling and Pressurising

Details the procedure for filling and pressurising the central heating system correctly.

6.6 Expansion Vessel (Central Heating only)

Describes the boiler's pre-charged expansion vessel and its capacity limits.

6.7 Safety Pressure Relief Valve

Explains the function, setting, and discharge pipe requirements for the safety pressure relief valve.

6.8 Domestic Hot Water Circuit (Fig. 7)

Details the domestic hot water circuit, including connections, regulations, and potential issues.

6.9 Showers

Provides recommendations for shower controls to ensure user comfort and safety with the boiler.

6.10 Hard Water Areas

Advises on suitable water treatment devices for installations in hard water areas.

Site Requirements

7.1 Location

Specifies suitable locations for fitting the boiler, considering flue discharge and building type.

7.2 Clearances (Figs. 8 & 9)

Details the minimum clearances required around the boiler for installation, servicing, and air movement.

7.3 Ventilation of Compartments

Addresses ventilation requirements when the appliance is installed within a cupboard or compartment.

7.4 Gas Supply

Outlines the requirements for the gas supply installation, including relevant standards and pipe connections.

7.5 Electrical Supply

Details the electrical supply requirements, including earthing, polarity, and isolation methods.

7.6 Bath & Shower Rooms

Provides guidance on siting the boiler in rooms containing baths or showers, referring to zone regulations.

7.7 Condensate Drain

Explains the critical requirements for installing the condensate discharge pipework to prevent blockages and lockouts.

7.7 Condensate Drain (cont.)

Continues detailing condensate drain termination methods, including connections to drains, gullies, and soakaways.

7.7 Condensate Drain (cont.)

Further elaborates on condensate discharge, including pumped systems, trace heating, and avoiding back-pressure.

7.8 Flue

Provides general guidelines for siting flue terminals, considering plume dispersal and proximity to building features.

Flue Options

8.1 Horizontal Flue Systems

Details the standard horizontal flue system, including engagement, permissible lengths, and support requirements.

8.2 Flue Lengths

Specifies the maximum permissible equivalent flue lengths for various horizontal and vertical configurations.

8.3 Flue Trim

Describes the application of flexible flue trims on the inner and outer faces of the wall.

8.4 Terminal Guard (Fig. 15)

Explains the use and positioning of terminal guards when dictated by codes of practice.

8.5 Flue Deflector (Fig. 16)

Details how to fit and angle the flue deflector for optimal plume deflection.

8.6 Flue Accessories

Refers to the Flue Installation Guide for comprehensive details on flue accessories like elbows and extensions.

Installation

9.1 Unpacking & Initial Preparation

Guides through unpacking the boiler, performing risk assessments, and initial site preparation.

9.2 Flushing

Details the procedure for flushing the central heating system before connecting the boiler.

9.3 Fitting The Boiler

Provides step-by-step instructions for lifting, mounting, and connecting the boiler to the wall plate.

9.4 Fitting the Pressure Relief Discharge Pipe

Explains how to correctly fit the discharge pipe for the pressure relief valve.

9.5 Condensate Drain (see section 7.7)

Details the connection of the condensate drain pipework to the boiler trap outlet.

9.6 Fitting The Flue

Guides on fitting the horizontal telescopic flue, including measuring, adjusting sections, and sealing.

9.6 Fitting The Flue (Cont)

Continues the process of fitting the flue, ensuring correct orientation, terminal positioning, and making good.

9.7 Making The Electrical Connections

Provides instructions for making the electrical connections to the boiler and external controls.

9.8 Preliminary Electrical Checks

Outlines essential preliminary electrical checks to be performed before commissioning the boiler.

Commissioning

10.1 Commissioning the Boiler

Details the steps for commissioning the boiler, including system checks, filling, pressurising, and initial startup.

Gas Type Check

Explains the procedure for the boiler to automatically check and recognize the installed gas type (NG or LPG).

10.2 Check the Operational (Working) Gas Inlet Pressure & Gas Rate

Describes how to check the boiler's working gas inlet pressure and measure the gas rate for correct operation.

Changing the Gas Type

Provides instructions on how to change the boiler's gas type setting if the gas supply is altered.

Completion & System Draining

11.1 Completion

Covers the final steps of installation, including user instruction, safety demonstrations, and setting temperatures.

11.2 System Draining

Explains how to activate the De-Aeration Function for draining the central heating system.

Servicing

12.1 Performance Safety Check & Annual Servicing

Outlines the recommendations and procedures for annual servicing, including safety checks and combustion analysis.

Check the Combustion Performance (CO/CO2 ratio)

Details how to measure the CO/CO2 ratio for combustion performance assessment and acceptable limits.

12.2 Annual Servicing - Inspection

Provides a step-by-step guide for the annual inspection of the boiler components during servicing.

DHW Filter (Fig. 48)

Explains how to locate, clean, and reassemble the domestic hot water filter if flow is diminished.

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