Table Of Contents - Baxi 424 Combi 2 Installation And Service Manual

Contents
1 Safety ........................................................................................................................................................................................................ 6
1.1 Benchmark ...................................................................................................................................................................................... 6
1.1.1 Building regulations and the benchmark commissioning checklist. ....................................................................... 6
1.1.2 The benchmark scheme ............................................................................................................................................... 6
1.1.3 Installer notification guidelines ..................................................................................................................................... 7
1.2 General safety instructions ............................................................................................................................................................ 8
1.3 Recommendations ......................................................................................................................................................................... 8
1.4 Specific safety instructions ........................................................................................................................................................... 9
1.4.1 Handling ......................................................................................................................................................................... 9
1.5 Liabilities ......................................................................................................................................................................................... 10
1.5.1 Manufacturer's liability ................................................................................................................................................. 10
1.5.2 Installer's liability ........................................................................................................................................................... 10
1.5.3 User's liability ................................................................................................................................................................ 10
2 About this manual ................................................................................................................................................................................ 11
2.1 General ........................................................................................................................................................................................... 11
2.2 Additional documentation ............................................................................................................................................................ 11
2.3 Symbols used ................................................................................................................................................................................ 11
2.3.1 Symbols used in the manual ....................................................................................................................................... 11
2.4 Abbreviations/glossary. ................................................................................................................................................................ 11
3 Technical specifications .......................................................................................................................................................................... 12
Homologations ............................................................................................................................................................................... 12
3.1
3.1.1 Safety, performance & quality .................................................................................................................................. 12
3.1.2 Certifications ................................................................................................................................................................ 12
3.1.3 Gas category ................................................................................................................................................................. 12
3.1.4 Standards ...................................................................................................................................................................... 12
3.2 Technical data .............................................................................................................................................................................. 13
3.2.1 Technical information ................................................................................................................................................... 13
3.2.2 Features of the temperature sensors ........................................................................................................................ 16
3.3 Dimensions and connections ..................................................................................................................................................... 16
3.4 Electrical diagram.......................................................................................................................................................................... 18
4 Description of the product. .....................................................................................................................................................................19
4.1 General description ...................................................................................................................................................................... 19
4.2 Operating principle ....................................................................................................................................................................... 19
4.2.1 Air-gas adjustment ...................................................................................................................................................... 19
4.2.2 Combustion ................................................................................................................................................................... 19
4.2.3 Heating and domestic hot water production ............................................................................................................ 19
4.2.4 Schematic diagram ..................................................................................................................................................... 20
4.3 MAIN COMPONENTS ................................................................................................................................................................. 20
4.4 Control panel description ............................................................................................................................................................ 21
4.4.1 Description of the control panel .................................................................................................................................. 21
4.5 Contents of the package .............................................................................................................................................................. 21
4.6 Accessories & options ................................................................................................................................................................. 21
5 Before installation ................................................................................................................................................................................ 22
Installation standards and rules ................................................................................................................................................. 22
5.1
5.2 Installation requirements .............................................................................................................................................................. 22
5.2.1 Gas supply. .................................................................................................................................................................. 22
5.2.2 Electrical supply ............................................................................................................................................................ 22
5.2.3 Hard water area ............................................................................................................................................................ 23
5.2.4 Bypass ........................................................................................................................................................................... 23
5.2.5 System control .............................................................................................................................................................. 23
5.2.6 Treatment of water circulating systems ..................................................................................................................... 23
5.2.7 Showers ......................................................................................................................................................................... 24
5.2.8 Expansion vessel (CH only) ......................................................................................................................................... 24
5.2.9 Safety pressure relief valve......................................................................................................................................... 24
Flow rate/head at the plate characteristics ................................................................................................................................ 25
5.3
Contents
Combi 2
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