Central Heating Y Plan Wiring Diagram

This arrangement is common on new installations as it allows for multiple heating zones with the minimum of additional plumbing and wiring.

Central heating y plan wiring diagram.
Part 2 in the series looks at s plan wiring a system which uses two separate valves.
Electrical wiring for central heating systems.
This video covers the wiring and electrical operation of a y plan system.

Part 3 in the series looks at y plan wiring a system which uses a single 3 port valve.
It can be easily extended to include additional heating zones by adding an extra valve and room thermostat for each zone this is typically called s plan plus.
This diagram shows the wiring layout using the most typical components.

Here coloured wires indicate the permanent mains supply to the boiler and programmer.
One valve for hot water another for heating.
Electrical wiring for central heating systems.

Faq v4073a mid position y plan valve operation how a mid position valve operates within a sundial y plan heating system faq w plan hot water priority system how a w plan heating system operates faq pump overrun wiring diagrams for y plan incorporating a st9400 programmer.
The diagram set includes wiring plans for a number of popular configurations of central heating systems c plan w plan y plan s plan s plan etc.
And you should select the most appropriate diagram that matches the components you have installed in your system along with what youre hoping to achieve in terms of controllability.

The sundial y plan is designed to provide independent temperature control of both heating and domestic hot water circuits in fully pumped central heating installations.
Sundial y plan satisfies the minimum standard requirements of the building regulations part l1 when used in conjunction with radiator thermostats and an automatic bypass valve.
Wiring diagrams and further information continues below.

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