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Baxi Duo-tec 2 Combi 33 GA User Manual

Baxi Duo-tec 2 Combi 33 GA
56 pages
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© Baxi Heating UK Ltd 2013
Duo-tec 2 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 Duo-tec 2 Combi 33 GA Specifications

General IconGeneral
Boiler TypeCombi
Fuel TypeGas
Output Rating33 kW
Domestic Hot Water Output33 kW
Efficiency (%)93%
ErP Heating EfficiencyA
ErP Water Heating EfficiencyA
NOx Class5
Hot Water Flow Rate13.5 l/min
Hot Water Flow Rate at 35°C Rise13.5 l/min
Maximum Working Pressure3 bar
Gas TypeNatural Gas
Dimensions (HxWxD)780 x 450 x 345 mm
Weight34.5 kg
MountingWall
Central Heating Flow Temperature Range30-80°C

Summary

Benchmark Scheme and Building Regulations

Benchmark Scheme Responsibilities

Outlines manufacturer and installer responsibilities for product quality and service.

Building Regulations Compliance

Details notification requirements for heating appliance installations.

Legislation and Standards

Installation, Commissioning, Service & Repair Requirements

Mandates adherence to manufacturer's instructions and regulations by competent persons.

Relevant Codes of Practice

Lists applicable British and Irish Standards for gas and heating installations.

Safe Manual Handling

General Safety and Lifting Procedures

Provides essential safety advice for handling and lifting the boiler.

1.0 Introduction

Baxi Duo-tec 2 Combi GA Range Overview

Introduces the boiler's features, output ranges, and system requirements.

3.0 Appliance Operation

Central Heating and Domestic Hot Water Modes

Explains the boiler's operation during central heating and DHW demands.

4.0 Technical Data

Key Specifications and Pressures

Lists crucial technical data including heat outputs, gas/water pressures, and dimensions.

5.0 Dimensions and Fixings

Boiler Mounting and Clearance Requirements

Details boiler dimensions, fixing points, and necessary clearances for installation.

6.0 System Details

Water System Treatment and Bypass

Advises on system flushing, inhibitor use, and bypass configurations.

6.0 System Details (Continued)

Filling, Pressurising, and Safety Relief Valve

Covers system filling, pressurising, and the safe installation of the pressure relief valve.

7.0 Site Requirements

Boiler Location and Installation Clearances

Specifies suitable locations and minimum clearances for boiler installation.

7.0 Site Requirements (Continued)

Gas, Electrical Supply, and Bathroom Rules

Details requirements for gas/electrical supply and bathroom installation zones.

7.0 Site Requirements (Continued)

Condensate Drain Installation

Provides comprehensive guidelines for correct condensate drain pipework installation.

7.0 Site Requirements (Continued)

Flue Terminal Positioning and Guards

Covers requirements for flue terminal placement and the use of guards.

8.0 Flue Options

Horizontal Flue System Installation

Explains the setup and limitations of horizontal flue systems.

9.0 Installation

Unpacking, Preparation, and System Flushing

Covers initial steps for installation including unpacking and system preparation.

9.0 Installation (Continued)

Fitting the Boiler and Condensate Drain

Details securing the boiler and connecting the condensate drain pipe.

9.0 Installation (Continued)

Fitting the Horizontal Telescopic Flue

Guides on assembling and installing the horizontal telescopic flue kit.

9.0 Installation (Continued)

Electrical Connections and Preliminary Checks

Covers boiler wiring, external control connections, and pre-commissioning electrical checks.

10.0 Commissioning

Boiler Commissioning Steps and Gas Type Check

Outlines the procedure for commissioning, including de-aeration and gas type verification.

10.0 Commissioning (Continued)

Checking Gas Inlet Pressure and Rate

Details how to measure and verify the operational gas inlet pressure and rate.

11.0 Completion and System Draining

Final Installation Tasks and User Handover

Covers final checks, user instructions, and system draining procedures.

12.0 Servicing

Performance Safety Check and Combustion Analysis

Details annual servicing, safety checks, and combustion performance analysis.

13.0 Changing Components

Spark Ignition and Flame Sensing Electrodes

Guides on replacing ignition and flame sensing electrodes.

13.0 Changing Components (Continued)

Fan and Air/Gas Venturi Replacement

Covers the replacement procedure for the fan and air/gas venturi.

13.0 Changing Components (Continued)

Pump and Automatic Air Vent Replacement

Details replacing the pump assembly and the automatic air vent.

13.0 Changing Components (Continued)

Plate Heat Exchanger and Diverter Valve

Guides on replacing the plate heat exchanger and diverter valve assembly.

13.0 Changing Components (Continued)

PCB and RDS Replacement

Explains the procedure for replacing the main circuit board and data stick.

13.0 Changing Components (Continued)

Gas Valve and Expansion Vessel

Covers replacing the gas valve and the expansion vessel.

14.0 Combustion & Calibration

Checking and Calibrating Combustion

Details how to check combustion parameters and perform calibration.

15.0 Electrical

Illustrated Wiring Diagram

Provides a detailed wiring diagram for all electrical components and connections.

16.0 Short Parts List

Component Identification and Part Numbers

Lists major components with their corresponding manufacturers' part numbers.

17.0 Fault Finding

Initial Checks and Error Code Interpretation

Guides on initial troubleshooting steps and understanding boiler error codes.

17.0 Fault Finding (Continued)

Central Heating Fault Diagnosis Flowchart

A flowchart to help diagnose faults occurring during central heating operation.

17.0 Fault Finding (Continued)

Domestic Hot Water Fault Diagnosis Flowchart

A flowchart to help diagnose faults occurring during DHW operation.

17.0 Fault Finding (Continued)

Troubleshooting Solutions (Sections A-E)

Provides specific steps to resolve common faults and error codes.

17.0 Fault Finding (Continued)

Troubleshooting Solutions (Sections F-H)

Provides specific steps to resolve common faults and error codes.

17.0 Fault Finding (Continued)

Troubleshooting Solutions (Sections I-M)

Provides specific steps to resolve common faults and error codes.

18.0 External Low Voltage Controls

Optional Outdoor Sensor Installation and Settings

Guides on positioning, connecting, and setting up the optional outdoor sensor.

18.0 External Low Voltage Controls (Continued)

Optional 7 Day Wired Sensor Connection

Details the wiring procedure for connecting a 7-day wired sensor.

GAS BOILER SYSTEM COMMISSIONING CHECKLIST

System Checks and Performance Measurements

A comprehensive checklist for verifying installation, controls, and performance parameters.

Service Record

Recording Annual Service History

Template for recording details of annual boiler servicing.

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