Systems Accessories highlights the essential heating component spares required to support a complete heating control system.

The Wiring Centre has been designed to simplify the wiring of Sundial Plan central heating installations.   Sundial Plan Wiring Centre can be used with C, S and Y Plan systems and has single terminal connections which are clearly labeled.   Provision is made for basic and pump overrun boilers. The...
OpenTherm provides more precise control on the boiler through the control of the gas valve. It allows the amount of heat provided by the boiler to be controlled to match the varying demand signal. By reducing the flow temperature to a minimum as it leaves the boiler, the return temperature is kept below the dew point...
The 10 way Junction Box has been designed to simplify the wiring of Sundial Plan central heating installations.   Designed to be used in conjunction with the numbered wiring diagrams provided in the Honeywell Wiring Guide. This is a universal box and can be used with any 15 amp rated wiring...
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