Tado Extension kit and Danfoss Rx1

[Sach2018]

Hi all, I am trying to replace my thermostat with a Tado system. However I can’t seem to get the Tado Extension box (replacing a Danfoss RX1) to engage the boiler. I am just simply using the already wired back plate (picture should be attached) and changing the jumper on the Extension box to switched live wiring. It’s not very clear in the picture but there are 3 wires going in to L of which one is a loop of wire between L and 2. Any help will be apreciated

 

[Sach2018]

Sorry the back picture didn’t work in the above post. It’s attached here.

 

[stem]

The following terminals at your RX1 have wires connected:

N
L
2 -Com
3- On

If so, set the Tado Extension box to the potential free setting and move the wires over including the loop as follows:

The wires in RX1 N go to Tado N

The wires RX1 L go to Tado L

The wire in RX1 2-Com goes to Tado 1-COM

The wire in RX1 3-On goes to Tado 4 - NO

EDIT
I assume that you have a combi boiler providing instantaneous hot water, and not a hot water cylinder. If you do have a hot water cylinder and want timed control of the hot water then you are installing the Tado in the wrong place, not all the wires you need are present. If you have a combi, carry on as above.

I don't know what type of thermostat is presently working in conjunction with your RX1, but if it isn't a programmable thermostat and there is a timeswitch elsewhere providing on / off time control for the heating (eg on the boiler) then that will need to be set to be permanently 'on' 24/7.

 

[Sach2018]

Thanks Stem. That has done the trick.