Drayton Mid-Position Valve Actuator
I've been through 3 of these, each lasting less than 24 months. Ok when they work but that usually isn't for long.
27 Mar 2015
A quick fix
My gas boiler was sometimes continuing to remain on even with the timer controls off and the hot water was getting extra hot. Research online showed the likely culprit to be the 3 way valve. The wet side was fine as the valve could be turned the 45 degrees with ease. The actuator seemed stiff. Screwfix was first choice for a replacement in a hurry. A quick job to fit the new actuator after noting where the coloured wires went. Job done and everything working fine now. Too early to say how reliable it will be hence 3 * for reliability.
27 Feb 2015
The indicator on my old one was stuck on W for hot Water, and wouldn't move when the central heating thermostat was cranked up to max- not even to the Midway position. So I took the actuator off by pressing the small button on the back and lifting it clear. This gave me access to the actual valve spindle - which moved easily in both directions, just by finger-power.
Don't be misled by the very limited rotation of only about 45 degrees. This is apparently normal, and does not indicate a fault within the brass valve body itself.
I fitted the new actuator to the valve and swopped over the wiring - one colour at a time.
The new actuator comes with the manual lever locked into the correct position for alignment. This is supposed to automatically release itself upon powering up, but failed to do so. But by seeing how it worked on the old one, I was subsequently able to release it myself without causing any damage.
Anyone with a modicum of electrical experience should be able to replace this component with only two things to bear in mind: 1) Turn the power off first! 2) Ensure you tighten the screws properly again in the terminal blocks.
22 Dec 2014
just the job
Easy to understand fitting instructions,had it fitted in 15mins .
11 Oct 2014