• The Sundial 'S' Plan is designed to provide independent temperature control of both heating and hot water circuits in fully pumped heating installations. Time control may be provided by a time switch or programmer.
• The Sundial Plan identifies the grouping of control products which together provide a complete central heating temperature control system.
• The controls should provide full independent temperature control of both living space and stored domestic hotwater.
• If there is no demand for either living space or domestic hot water heating, the central heating boiler and pump must both be switched off.
• Wiring details.
• Installation guide.

The standard components of a Sundial plan are room and cylinder thermostats together with a motorised valve, or valves. Adding a programmer will ensure that the householders temperature needs are met at the times required.