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 faq pump overrun wiring diagrams for s plan plus incorporating separate diagrams with st9100 time switch and st9400 programmer. Blue white orange yellow and red.
How To Install The Nest Learning Thermostat 3rd Gen In A Y
Y plan valve wiring. This video covers the 3 port valve. This has one inlet and two outlets one for hot water the. All of the example wiring diagrams ive seen for other valves have connections to the following four standard wires. Inparticular its position in a y plan system. 3 port valve operation. Electrical wiring for central heating systems.
Blue white orange and grey. I have a switchmaster 3 port valve that has the following five wires. The valve itself has three plumbing connections in out a and out b. 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. This scheme uses a 3 port mid position valve. It can still be fitted today however is not suitable for systems with more than one heating zone.
We also cover the basics of installing or replaceing a three port valve or head. Interactive house central heating control valves. A y plan heating system is a system that uses one motorised valve which has 3 ports for water to flow through. Here is the usual wiring for a y plan system. The s plan has two separate 2 port motorized valves one for central heating and one for domestic hot water. 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. The y plan has one three port mid position valve supplying heating and hot water for domestic use as shown below. Can anyone please tell me how to connect up a switchmaster in a typical y plan system. Gravity system y plan with no hot water off wire. We also cover the basics of installing or replaceing a three port valve or head. View and download hive active heating installation manual online.
In the past this was by far the most common setup as it only requires one valve. If you have a gravity fed or a y plan system 3port valve with no hot water off wire the green status light should be altered to be blue. Y plan wiring diagram with hive. In particular its position in a y plan system. The basic difference between the y plan and the s plan is the type of valves used in the pipework. The video below covers the 3 port valve.
Gallery of Y Plan Valve Wiring
