Wiring a siemens thermostat to a valiant boiler.

[buster19]

Hi,
Need help on wiring a siemens raa20 thermostat to a valiant ecotec. The valiant has terminals 3 & 4 for a external thermostat. The siemens only has two connections ( L & Y1 ). Which goes where? . Any help appreciated.

Thanks

 

[matt1e]

Hi,
Need help on wiring a siemens raa20 thermostat to a valiant ecotec. The valiant has terminals 3 & 4 for a external thermostat. The siemens only has two connections ( L & Y1 ). Which goes where? . Any help appreciated.

Thanks

L to 3
Y1 to 4

Will do ya

 

[buster19]

Thanks thats great. So number 3 is a live source & there is no link to the boilers live terminal required at all ?.

All the Best!

 

[mogget]

Thanks thats great. So number 3 is a live source & there is no link to the boilers live terminal required at all ?.

That's right!