Is one of us missing something ? I wanted to find out if the white wire was used on my system so I would know whether there would be a problem with using a 5 wire actuator.
I didn't know someone could make such a meal of a couple of 2 fairly simple questions. That's what happens when someone thinks they know it all I guess
chris, the only way the white wire will be used on your system is if you have C plan
and since you have a hotwater valve and a heating valve then the only way the white wire will be used is if you have c plan plus and it will be only the white on the hotwater valve that is used
so you can go ahead and change the heating valve for a 5 wire one without problems
now to the hot water valve
turn on hotwater only, does the pump run as well as the boiler?
if so you dont have c plan change the valve for a 5 wire one
you could also look at the pipe work, if the pipe from the pump splits then feeds the two valves then thats fully pumped s plan not c plan so the white wire is not req
you even try disconecting both valves white wires, make them safe then run the system, if it all works normally....... well there you go
Matt
Thanks Matt, you're a gent. Great instructions and easy to follow.
I can say without looking that the feed from the pump splits, it's immediately before the valves and is one of the reasons there is restricted movement in the pipe work either side of the valves. I'll run the other checks to make sure.
Hopefully it will be S plan, fitting 22mm valves will be so much easier.
Your help is much appreciated
Chris
