15558 : 2024 Instantaneous Domestic Water Heater for Use with LPG - Specification
1 SCOPE
1.1 This standard covers the requirement for an instantaneous domestic water heater of nominal useful heat output less than 25 kW (based on calorific value) for use with liquefied petroleum gas (LPG) at a working pressure of 2.942 kN/m2 (30 gf/cm2). It is an inlet watercontrolled appliance. It specifies the main constructional and performance characteristics for the instantaneous domestic water heater. It also sets the appropriate test methods for evaluating test characteristics. Appliances for boiling water are not covered in this standard.
1.1.1 For convenience, this standard has been divided into three sections as follows:
Section 1 Construction
Section 2 Performance Requirements
Section 3 General
2 REFERENCES
The standards given below contain provisions which, through their reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards:
| IS No. | Title |
| IS 554 : 1999/ISO 7-1 : 1994 | Pipe threads where pressuretight joints are made on the threads - Dimensions, tolerances and designation (fourth revision) |
| IS 2305 : 1988 | Method for mercurous nitrate test for copper and copper alloys (first revision) |
| IS 5116 : 2020 | Domestic and commercial equipment for use with LPG - General requirements (fourth revision) |
| IS 6480 : 2023 | Terms relating to domestic and commercial gas burning appliances - Glossary (second revision) |