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4.4 "Difference control unit" functional block
Heat source temperature sensor
Minimum temperature for ON
3 time frames adjustable (see timer)
pre(- sec.) and after(+ sec.) output delay
Some Examples individual or multiple plate heat exchanger
P1= Dt(T1,T2) P2= Dt(T1,T4)
P1= Dt(T1,T2) P2= Dt(T1,T4)
P1= Dt(T1,T2) P2= Dt(T1,T4)
P1= Dt(T1,T2 or T3) P2=
Dt(T4,T2orT3)
P1= Dt(T1,T2 or T3) P2=
Dt(T4,T2orT3)
P1= Dt(T1,T2 or T3) P2=
Dt(T1,T2)
P1= Dt(T1,T2 or T3) P2=
Dt(T1,T2)
P1= Dt(T1,T2orT3orT7) P2=
Dt(T1,T2)
P1= Dt(T1,T2orT3orT7) P2=
Dt(T1,T2)
P1= Dt(T1,T2orT3orT7orT8)
P2= Dt(T1,T2)
P1= Dt(T1,T2orT3orT7orT8) P2=
Dt(T1,T2)
P5= Dt(T1,T3) P7= Dt(T1,T7)
P5= Dt(T1,T3) P7= Dt(T1,T7)
P5= Dt(T1,T3) P7= Dt(T1,T7)
P8= Dt(T1,T8)
P5= Dt(T1,T3) P7= Dt(T1,T7) P8=
Dt(T1,T8)