Help on thermostat wiring Siemens Rev24RF

[alexv]

Hi everyone,

I am Alex and am a new member here from Athens Greece. I would like to ask for your help.

I have an autonomous natural gas Heater (no boiler) with a thermostat HLcontrols ETH-4. I bought a wireless thermostat Siemens Rev24RF and I would like to install it.

Wiring on ETH-4 is L, N, No and one wire to com (?).
Siemens has L,N, Lx, L1 and L2.

As I understand L to L, N to N, bridge L with Lx and No to L1. Is that correct? What is the com wire for? When I did the above, the heater startet and shut down afterwards and continued do it again after that.

Anyone can help out on this matter?

Thank you all in advance for your help.

 

[D_Hailsham]

Wiring on ETH-4 is L, N, No and one wire to com (?).
Siemens has L,N, Lx, L1 and L2.

As I understand L to L, N to N, bridge L with Lx and No to L1. Is that correct? What is the com wire for?

Remove the bridge between L and Lx. Connect the Com wire to Lx

When I did the above, the heater startet and shut down afterwards and continued do it again after that.

I hope you haven't damaged the heater by wiring it incorrectly.

 

[alexv]

D_Hailsham thank you very much.

It works now as it should and lucky enough I guess because nothing got damaged.

Thanks again.