y plan mystery no hw off wire

[onlyfitidealboilers]

firstly there is no brown on say a honeywell 3 port vlv, vlv doesn't motor at all for htw as it rests in this position. so cylinder stat on wire goes straight onto orange firing blr & pump

White heating on
orange power to blr
blue neutral
green yellow earth
grey htw off

 

[twgas]

There are basically 2 types of three-port valves, diverter valves, which give you either hot water or central heating, and mid position valves, which you can have hot water or central heating individually but will also allow both to be on together.
If, when using a mid-position valve, there is no HW off from the programmer, you can have the heating on by itself only when the cyl stat is satisfied.

 

[onlyfitidealboilers]

well thanks for that mick, learn something new everyday! I didn't know there was to diffrent type of vlvs ha ha

 

[twgas]

well thanks for that mick, learn something new everyday! I didn't know there was to diffrent type of vlvs ha ha

The "ha ha" at the end of your post sounds like a sarcasm, but your previous posts suggest you never new and, in fact, did learn something today.

 

[onlyfitidealboilers]

hello mick never new there was to types must of been overlooking this for donkeys years!

thanks for that anyway

 

[kevindgas]

set cylinder stat to 60 degrees & then set blr stat to 55 degrees, htw will never reach temperature thus not turning heating off!!!!

again incorrect!

Would love to no your theory as to how water can get hotter than the set point you have set!?

only you would think that, the highlighted part is what i disagree with !

suggest you read these:

http://octaveblue.co.uk/c_heating/index.htm

they may help you understand how the things work.

look at 4th down that will show you how you do not need a hot water off.
Y diverter valves come with 3,5 or 6 wire as well dependant on the make and type.

 

[onlyfitidealboilers]

I understand that mate, if you wire the grey into htw satisfied tho
your htw times will have to be set the same as heating, bit silly tho

thanks pal

 

[kevindgas]

your htw times will have to be set the same as heating, bit silly tho

just the way it was done prior to fully controlled systems became the normal.

 

[Robert Colson]

John Ward has done a couple of useful videos on Y plan wiring and how the 3 port valve actually works:

and

 

[jeff the gasman]

Right I’m lost. Back to the cc.

 

[ianmcd]

Right I’m lost. Back to the cc.

totally agree @jeff the gasman , some shoite in that post , let Bernie and Dungplunger advise them