Discuss Mid position valve problem in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Yes I do it's a job I'm going back to been nothing but a pain!Do you have access to a multi meter?
Also how’s your knowledge with electrics?
3 Port Valve Operation
The valve itself has three plumbing connections - in, out A and out B.
Regardless of other settings, at least one of the outlets is always open, so it is always possible for water to flow through the valve.
Outlet A is normally connected to the central heating, with B used for hot water.
Electrically, the valve has 5 wires:
No power
- Green/Yellow, Earth - connected to the metal body of the valve.
- Blue, Neutral - internally connected to the neutral side of the motor.
- White, Live in 1 - Activates the motor inside the valve to select either AB (both) or A (heating)
- Grey, Live in 2 - Used with the White wire to select outlet A only (heating)
- Orange, Live Out - this is used to switch the boiler on when the valve is at position A.
With no power applied, the spring holds the valve in position B, so water only flows to the hot water cylinder.
Power on White only
The motor will move the valve to the mid position AB, so both heating and hot water are selected. Internal switches and other components ensure the motor is held at this mid point.
Power on White and Grey
Here the motor will move to position A (heating only). When it gets there, an internal switch connects white and orange together, and this output is used to activate the boiler.
This results in a noticeable delay when switching on heating only, as the motor has to move the valve from B to A. This takes several seconds.
Hope this helps
Reply to Mid position valve problem in the Plumbing Jobs | The Job-board area at PlumbersForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.