Electrical wiring for central heating systems. Part 3 in the series looks at y plan wiring a system which uses a single 3 port valve.
Central Heating Controls And Zoning Diywiki
Y plan heating system wiring diagram. This has one inlet and two outlets one for hot water the. The water flows from the boiler through the bottom of the valve then the valve either sends the flow of water through port a to heating port b to hot water or through both ports in order to heat the radiators and hot water together. Remove 3 port valve making a note of the wiring you should have a switched live from the room thermostat to the valve motor. Also there will be a neutral and earth. 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. Heating controls wiring guide issue 17 v4073a y plan how a mid position valve operates within a y plan heating system how a w plan heating system operates faq pump overrun wiring diagrams for s plan incorporating a st9400 programmer.
Wiring diagrams and further information continues below. This video covers the wiring and electrical operation of a y plan system. A y plan heating system is a system that uses one motorised valve which has 3 ports for water to flow through. Here coloured wires indicate the permanent mains supply to the boiler and programmer. This allows the system to work on heating only. 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.
Also there will be a hot water off live fed through the cylinder thermostat. Overview of a y plan heating system. This diagram shows the wiring layout using the most typical components.
Gallery of Y Plan Heating System Wiring Diagram
