@ majdan1986. can you put a picture with the back of the boiler? I'm interested in the return circuit. thank you very much 
 
 
 
 
 
can you put a picture with the back of the boiler? I'm interested in the return
 
 
 
 
 
 
 
can you put a picture with the back of the boiler? I'm interested in the return
 
 
 
 
 
can you put a picture with the back of the boiler? I'm interested in the return
 
 
 
 
 
 
 
 
 
can you put a picture with the back of the boiler? I'm interested in the return