Replacing siemen landis & Staefa wiring problems

[Tracym74]

I am trying to replace the thermostat but I am struggled with the wiring I need to know which is NC, NO and COM. Fitting a smart thermostat. Here are is a Picture of my old one.

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• Tracym74
• 30 Mar 2018

Can some one please tell me which wire is which I have a siemen landis & Staefa raa02 on I am...

wire is going into 1 and 3

 

[picasso]

What smart thermostat are you trying to fit ?

 

[Tracym74]

I am try to fit a Somfy connected wired thermostat.Here is a pic of the new one inside.

 

[picasso]

1 should be com and 3 should be no, it wont make any difference to your new stat id they are the other way round as your new stat just connects them both.

 

[Tracym74]

I will give this ago tomorrow and let you know thank you.