| Detailed recommendations are contained in the current issue of the following British Standards and Codes of Practice:- BS4814, BS6798, BS5440 Part 1 and 2, BS5546 Part 1, BS5449, BS6891, BS6700, BS7074 Part 1 and 2, BS7593, BS7671. Manufacturer's instructions must not be taken as overriding statutory requirements. 1.2 Data See Table 1 and diagram 1.1 All dimensions are given in millimetres (except as noted). The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is 79.9%. The value is used in the UK Government's Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated have been certified by B.S.I. 1.3 Range Rating This boiler is range rated and may be adjusted to suit individual system requirements. See diagram 1.2 for the ratings and settings. 1.4 Testing and Certification This boiler is tested and certificated for safety and performance. It is, therefore, important that no alteration is made to this boiler unless approved, in writing, by Hepworth Heating Ltd. Any alteration not approved by Hepworth Heating Ltd., could invalidate certification, boiler warranty and could also infringe the statutory requirements. |