Part 2 in the series looks at s plan wiring a system which uses two separate valves. The diagram can be used as a boiler with a pump overrun as well you just take the pump live neutral earth from the wiring center and run it to the boiler terminals.
Y Plan Mitchellcampion
S plan wiring diagram with pump overrun. 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. One valve for hot water another for heating. A great advantage of s plan systems over y plan systems is the opportunity to have more than two zones. It can be adapted how you need it. Its just a guideline on how the average boiler is wired. S plan wiring c plan schematic gravity hot water controlled by a 6 wire valve not your standard 5 wire valve and a pumped central heating circuit controlled by a thermostat.
The 2 port valve has one live supply to motor it open when called to by the particular service it supplies. Faq wiring diagram y plan pump overrun st and dt92e faq wiring diagram s plan pump overrun st and dt92e faq wiring diagram s plan plus pump overrun st and dt92e faq wiring diagram combination boiler st honeywell t4 additional wiring diagrams lyric t6 additional wiring diagrams v zone valve s plan. Wiring diagrams and further information continues below. Boiler and pump receive live supply and operate. Soon you should feel some hot water in your radiators. There is a diagram on the taco web.
However when used as a pump overrun using 4 core flex from the wiring centre the mor and bor terminals would each have a live connection permanent live and switched liveand the pump live would be connected to the common terminal. Electrical wiring for central heating systems. This diagram shows the wiring layout using the most typical components. Here coloured wires indicate the permanent mains supply to the boiler and programmer. This video covers the wiring and electrical operation of an s plan system with two 2 port valves.
Gallery of S Plan Wiring Diagram With Pump Overrun
