Termostat

[David7776]

Sorry Guys if this has been covered before but i just wanted some advice. I have and old analogue BG (RS1) i believe its a Drayton and want to replace it with a touch screen programmable thermostat. My understanding is I can set the original programmer set to "on" and I can then use the new thermostat as the main programmer. THe wiring has got me slightly confused as on the old thermostat there is
Red
Blue
yellow
and earth

on the new thermostat there is
L
N
A2
A1


i was told i'd have to loop it ?
not sure how to wire it up. Hope you can help. I can't load the pictures so sorry

i Have a Worcster 9 year old 28cdi combo boiler and a BG UT1 programmer.
I'm sorry again if i have crossed posted but there plumber merchants couldn't help.

Kind regards

David

 

[holmslaw]

,,

 

[David7776]

Holmslaw

Was advised this too?? does it make a great deal of difference??

"Red to live,blue to neutral,yellow to A1 & link live to A2,terminat earth wire safely as it isn't used"

thankyou

David

 

[holmslaw]

..

 

[Lectrician]

You will need to sink a 35mm metal back box into the wall to accept that stat, the earth conductor would be connected to the metal box.

 

[David7776]

Connected as suggested, the only thing now is that the boiler is bring constantly. If you turn the original programmer to off the whole display disappears (i guess theres no power to it?). In all fact currently it' just a temp display!!!
Any ideas??

Cheers

David