This standard specifies the terms and definitions, classification and parameter, material, construction and safety requirements, operational requirements, test methods, inspection rules, marking, cautions and instructions, packing, transport and storage of gas-fired heating and hot water combi-boilers of closed combustion (hereinafter referred to as "boiler").
This standard is applicable to the combination boilers for heating and hot water, with nominal heat input not exceeding 70kW, maximum heating operating water pressure not exceeding 0.3MPa, operating water temperature not greater than 95℃, adopting atmospheric burner or fan assisted burner or full premix burner, also to single heating boilers.
This standard is not applicable to the following boilers:
——Natural draught flue type and outdoor boilers;
——Condensing boilers;
——Volumetric boilers;
——Boilers adopting two sets of independent combustion systems respectively for heating and hot water in the same enclosure, including the boilers with common duct.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Parameters
5 Material, Construction and Safety Requirements
6 Operational Requirements
7 Test Methods
8 Inspection Rules
9 Marking, Cautions and Instructions
10 Packing, Transport and Storage
Appendix A (Informative) Chapter and Article Numbers of This Standard which are Corresponding to That of EN 483: 1999 and EN 625: 1996
Appendix B (Informative) Technical Differences and Causes between this Standard and EN 483: 1999 and EN 625: 1996
Appendix C (Informative) Classification by Air Supply and Evacuation Installation Modes
Appendix D (Informative) Requirements of Composition and Sealing Force of Gas Automatic Stop Valve in Gas System
Appendix E (Informative) NOx Pollution
Appendix F (Normative) Electrical Safety of the Boilers Using AC Power Supply
Appendix G (Normative) Electromagnetic Compatibility Safety
Appendix H (Informative) Heat Losses from Test Rig of the Indirect Method and Test Method for Contributions of Circulating Pump
Appendix I (Informative) Means of Determining the Ignition Time at Full Load
Bibliography
