BS 5918:1989

Foreword
Committees responsible
Code of practice
1 Scope
2 Definitions
3 Legal requirements
4 Types of system
5 Components for solar water heating systems
6 Design considerations
7 Thermal performance of solar water heating systems
8 Electrical considerations
9 Installation
10 Commissioning and documentation
11 Maintenance
Appendices
A Maintenance of weathertightness
B Loads on collectors
C Condensation and ventilation in roof spaces
D Method for calculating the thermal performance
E Methods of pressure and leak testing of absorber
    plates
F Methods of type testing for collectors
G Methods of testing for differential temperature
    control systems
Tables
1 Some relevant British Standards for components and
    fittings
2 Solar collector classification
3 Approximate percentage of the annual solar energy
    supplied in each month
4 Maximum dead load components for roof pitches in the
    range 20 degrees to 45 degrees
5 Maximum snow load components for roof pitches in the
    range 20 degrees to 45 degrees
6 Maximum wind load components for roof pitches in the
    range 20 degrees to 45 degrees
7 Test temperature ranges
Figures
1 Working principle of solar hot water system
2 Examples of arrangements for solar preheating
3 Flat plate collector
4 Annual solar energy supplied by the example system
    as a function of collector class and effective area
5 Variation of the solar energy supplied by the
    example system with a class E collector, with
    orientation and tilt of the collector
6 Components of force in a solar collector
7 Variation over the UK of the annual mean daily
    global irradiation on a horizontal surface (in
    MJ/m2)
8 Mean daily temperature (in degrees C) for the years
    1941-1970, reduced to Mean Sea Level, 0.6 deg C/
    100m
9 Orientation factor Ch for irradiation
10 Orientation factor Cg for peak irradiance
11 Graphical estimation of parameter E from calculated
    values of the collector area parameter M and the
    collector type parameter K
12 Graphical estimation of parameter CR from calculated
    values of the storage parameter R and the collector
    type parameter K
13 Controller operating curves

Recommendations for the design, construction, installation and commissioning of components and systems for domestic hot water preheating for single family dwellings.