install wireless room stat

[swsmale]

Hi
Have potterton netaheat standard boiler and have bought honeywell CM927 wireless room stat. Need to connect control unit to boiler, unsure about terminals. Boiler has 3 terminals on wiring diagram. to which 2 terminas should the control unit (stat) be connected?

boiler wiring diag

• swsmale
• 2 Feb 2010
• 2

Thanks
Shaun

 

[twgas]

Stats are normally connected to the valves not directly to the boiler, what valves, time controls etc do you have.

 

[swsmale]

Really? I thought room stats connected directly to the boiler - why is there a specific connection for them in the boiler terminal block then?

 

[twgas]

The diagram you've posted is not in the boiler.
Believe me the valve(s) are controlled by the stats and do in turn control the boiler and the pump (if there is not a pump over-run)