2-Ports & 3-Ports

[Muushy]

How are this fiited? and wired up? and whats the difference in them? iv'e seen some systems with two two ports and systems with just a three port, please someone explain im a bit lost

 

[sonray ltd]

two ports are used on a s plan, s plan plus, gravity hw etc.
three ports can be mid position or divertor valves used in a y plan system.

wiring can be different depending on what system your installing.

 

[Mike Jackson]

Domestic Central Heating Wiring Systems and Controls by Ray Ward is very handy for identifying and solving problems with CH wiring systems.


It's available from Corgi Direct. Domestic Central Heating Wiring Systems and Controls

Mike