Single switch as an on/off thermostat

[morscerta 0]

Hi.

I am a hobbyist beginner. I have a gas boiler Junkers ZWE 24-4 MFK (manual available at: 

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 ). By default, the proprietary thermostat uses an analog three wire that feeds different voltages 2,8 - 24 V DC. 

I learned that there is a jumper in the boiler's terminal block between Ls-LR that when removed causes the heating to stop without turning off the whole machine. It is therefore a place to plug in an on/off thermostat. As a hobby project I want to use a fibaro module that I will then code with raspberry to open/close depending on the temperature in another room.

Could someone please review if the scheme below is a proper way to plug in a Fibaro single switch FGS-213? 

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[Jamie mccrostie 82]

14 hours ago, morscerta said:

Hi.

I am a hobbyist beginner. I have a gas boiler Junkers ZWE 24-4 MFK (manual available at: 

Please login or register to see this link.

 ). By default, the proprietary thermostat uses an analog three wire that feeds different voltages 2,8 - 24 V DC. 

I learned that there is a jumper in the boiler's terminal block between Ls-LR that when removed causes the heating to stop without turning off the whole machine. It is therefore a place to plug in an on/off thermostat. As a hobby project I want to use a fibaro module that I will then code with raspberry to open/close depending on the temperature in another room.

Could someone please review if the scheme below is a proper way to plug in a Fibaro single switch FGS-213? 

Please login or register to see this attachment.

Yes this will work

Get the fgs 212 or 222 relay instead of the switch 2 for this then if 'LS' is switched by some other function in the controller

the fibaro relay wont go off line

You can feed the unconnected L off the incoming supply and then just switch your LS and LR thru the contacts.

Just make sure its all the same voltage L and LS, which it looks like it is, other wise you will need another seperate relay for safety seperation.

Edited March 6, 2017 by Jamie mccrostie