Wiring problem?

[finchy01]

We recently installed some underfloor heating for a customer. I've not done it before so enlisted some help of another plumber friend of mine.

Problem. Heating only = fine.
CH and ufh= fine
Ufh only = brings ch on too and can't be switched off on the room stat and rads get extremely hot.

I've not had a chance to get back but any ideas? We put a 2 port in for the Ufh as there wasn't one supplied with the pack.

 

[ShaunCorbs]

Voltage telling ch two port to open or Faulty ch two port

 

[Uheat – Wojtek]

Morning,

have you got another 2 port zone valve installed for the CH?

Thanks,

 

[Darren Jackson]

Have you zoned the UFH and CH with 2 zone valves, 2 room stats and a 2 channel programmer?