3 way valve problem

[pipfootball]

Hi all, I recently changed the 3way valve and in the process swapped the wires like for like. My problem is that now when I switch on the HW the CH comes on. I have noticed that the positions on the valve of the A and B or the opposite way round on the new one. The system is working fine but obviuosly this is not good as the room stat is operating through HW. Would it be a case of swapping over the wires from the valve i.e CH/ to HW and if so which of these do I swap. Thanks and soory for going on. Phil.

 

[45yearsagasman]

B should go to the cylinder and A to the heating. Swap the valve round and do the job correctly.

 

[pipfootball]

Thanks, I fiited new one as per old one taking it for granted markings were same. If valve were turned round it would make valve appear upside down with wiring coming out of top.

 

[pipfootball]

Anyone else any suggestions

 

[matt1e]

Anyone else any suggestions

Yes listen to 45yearsagasman, its the easiest option

Matt

 

[mickyg]

Anyone else any suggestions

yes, listen when someone gives you good advice !

 

[DBPlumbHeat]

A = Air(radiators) B = Bath(hot water) AB is your heating flow to valve.

 

[ianmcd]

I remember it differently but just as effective B for Bath and A for erse as that is what you put on a radiator when sitting on it

 

[Mike_W]

Anyone else any suggestions

Yes, if you don't know what you are doing get a pro, otherwise listen to what you have been told by 45yearsgasman and ignore anything Joe 90 ever tells you cos he is a clueless ********.

 

[twgas]

I'd be inclined to get a couple of relays from maplins, a metres of 5 core flex and keep playing till it worked as i wanted it to

 

[twgas]

Then after a couple of days, turn the valve round, replace wiring as it was to start with..........happy days.

 

[pipfootball]

Thanks guys, so it doesn't matter if motor unit is upside down

 

[matt1e]

I'd be inclined to get a couple of relays from maplins, a metres of 5 core flex and keep playing till it worked as i wanted it to

you would only need one
and depending on the room stat and wiring then you may not need any

 

[matt1e]

Thanks guys, so it doesn't matter if motor unit is upside down

upside down on the vertical..... is ok
upside down on the horizontal..is not
Matt

 

[pipfootball]

thanks Matt. reason i asked was that I wasn't sure if valve only operated one way so turning over may cause damage. Her indoors won't be happy when she has system off while I drain it and change valve round.