4
IDLE                     
HEATING                  
MAINTAINING              
FLUSHING                 
  5
START                    
STOP                     
TANK_EMPTY               
REACTION_TEMP_REACHED    
REACTION_TIME_ELAPSED    
HEATING                  
NULL                     
NULL                     
NULL                     
NULL                     
NULL                     
IDLE                     
NULL                     
MAINTAINING              
NULL                     
NULL                     
IDLE                     
NULL                     
NULL                     
FLUSHING                 
NULL                     
NULL                     
IDLE                     
NULL                     
NULL                     
ENABLE_HEATING           
NULL                     
NULL                     
NULL                     
NULL                     
NULL                     
DISABLE_HEATING          
NULL                     
DISABLE_HEATING          ENABLE_MAINTAINING       
NULL                     
NULL                     
DISABLE_MAINTAINING      
NULL                     
NULL                     
DISABLE_MAINTAINING      OPEN_FLUSH_VALVE         
NULL                     
NULL                     
CLOSE_FLUSH_VALVE        
NULL                     
NULL