Need Help Unvented cylinder with one 3 port valve.

[Imants]

Hi, i have changed my hot water cylinder for a Megaflow hot water cylinder. now having problems to wire this thing in. the programmer i have (Tempus 7) has only got HTG on and DHW on options, so i it's only for 2x2 port valve system?!?! originally i have only 3 port valve at the moment, looking to install additional 2 port for Y system, but then again, it asks for a DHW off option from programmer... really confused now. do i really have to replace the programmer as well, or there is any better ideas. Thanks!

 

[guest119]

Hello, welcome, 1st post straight to the question.

Boydy

 

[Geordie Spark]

There are a LOT of diagrammes for heating sysems hidden away on this forum.

Try using the Search Facility & see what you can find.

 

[telectrix]

i'll pitch in and send the underfloor system wiring to you. it's on the back os a beermat.

 

[Geordie Spark]

i'll pitch in and send the underfloor system wiring to you. it's on the back os a beermat.

That's nothing. My old Gaffer used to design control systems for power stations on the back of the envelope that the gas bill came in.

 

[Justin2211]

If you running a 3 port you would need it to be sprung return for this to work . So you need to either change the valves or the programmer
You could of course fit a relay to it for it to motor over when off