Installation 
 
 
Step 2. Electric wiring work 
Other thermal L and N are connected to XT3~21, 22. 
 
Optional water temperature sensor is conneceted to AP1 CN16. 
 
Step 3. Wired controller setting 
Other  thermal  should  be  selected  "with"  if  necessarily  from  COMMISION  →  FUNCTION,then  set 
switch on (outdoor)temperature and control logic(1/2/3).