Viessmann Vitodens 222-W B2LB User manual




Installation Instructions Viessmann Vitodens 222-W B2LB + Vitotronic 200 HO2B
These are your installation instructions to connect your tado° Extension Kit to your boiler. Please follow the instructions                 
carefully and only confirm the successful installation once you have finished all steps for all devices.

If you have any question regarding the use or installation of tado° please consult our Help Center at www.tado.com/support

 
Version 4.3


For support please visit: www.tado.com/support 


Switching off your boiler and corresponding circuit breaker
Make sure that you take steps to ensure that the power          
supply to your boiler is completely switched off and        
remains switched off during the installation process. In       
addition it is compulsory to remove the breaker/fuse that        
your boiler is connected to, or turn of the corresponding         
switch in your circuit breaker box.
If you are not 100% sure which is the        
correct switch/breaker/fuse then you   
must remove all breakers/fuses or turn     
off the main power switch in your circuit       
breaker box.

Please leave a message at the circuit breaker box such to          
inform everyone not to turn anything back on.
Please make sure that all residents of the       
home are aware that you are going to turn        
off and that you are the only one who is         
allowed to switch it on again.


Please be aware that your desktop computer      
and lighting will turn off when you switch off        
the mains power circuit breaker switch.

To provide safe lighting for the installation you       
can use the flashlight function of your      
smartphone or a torch.




 

1


For support please visit: www.tado.com/support 


Open your boiler to get access to its control unit
Access the boiler control by opening the boiler. Since every boiler has a different opening method, take a look at our examples below to get an idea how your boiler can be                               
opened. All wiring connection terminals are found on the control unit. You will be looking for the place where lots of wires connect to the boiler. Look for the terminal where a room                                
thermostat can be connected. The installation manual of your boiler very often helps.





2


For support please visit: www.tado.com/support 


Make sure the power is off
Use the voltage tester to check if there is still power on           
any wiring terminal.
If there is any light it means that there is still power on the             
wiring. Before continuing, switch off the circuit breaker.
If there is no light, power is off and it is safe to proceed.





3


For support please visit: www.tado.com/support 


Documenting the wiring of the existing setup
As soon as you have removed the cover please take detailed photos of the existing wiring with the cables still attached. Try your best to make the terminal numbering legible.

This step is very important, you will definitely       
need this information in the future. Should      
you need help, it will be difficult for our        
Technical Support Team to assist you     
without the photos of all of the current       
wiring.

You will need these photos to restore      
your old system if you move house in       
order to take your tado° with you. Please       
save them in a place where you will find        
them again in this case.



 

4


For support please visit: www.tado.com/support 


Identifying the terminal block to connect to
Please identify the terminal block labeled X14



 

5


For support please visit: www.tado.com/support 


Connecting the tado° cable
Please take the cable provided with the tado° Extension Kit. Use the cable to connect              
your boiler with the tado° Extension Kit.

Please connect the cable as follows to the boiler:
Connect the Blue wire to the terminal labelled 1.
Connect the Brown wire to the terminal labelled 2.


Interface Activation
FInd the terminal block 96 . Make sure the bridge wire is present between L-1 .

 

6


For support please visit: www.tado.com/support 


Preparing the labels
Using only a pen, add the wire colors to the labels as           
shown on the right.
Write into the blank areas of the labels as shown below.          
Please double check your work.

Please attach the labels to the cables as shown in the          
image. Matching the cable colors with the colors written        
on the stickers is mandatory. Please double check your        
work now.

Write “ Blue ” on the label - .
Write “ Brown ” on the label + .




 

7


For support please visit: www.tado.com/support 


Leading the cable out and closing the boiler
Carefully thread the tado° cable out of you boiler. Please check that there are no sharp               
edges that could damage or trap the cable.
Carefully close the boiler and its control panel by reversing the sequence in which you              
opened it.


 

8


For support please visit: www.tado.com/support 


Selecting the location for the tado° Extension Kit
The following steps describe how to mount the tado° Extension Kit on the wall.


Please do not mount the tado° Extension Kit to the boiler itself.



 

9