1 All boilers in cascade start running when system temperature is
3°C below set point.
2 First boiler stops running when system temperature is 3°C above
set point.
3 After 4 minutes the second boiler stops running if ΔT< 6K and the
system temperature is still more than 3°C above set point.
4 After 8 minutes the third boiler stops running if ΔT< 6K and the
system temperature is still more than 3°C above set point.
Cascade algorithm type temperature, the setpoint sent to the running
boiler is :
Power; requested by the zones.
Temperature; flow setpoint requested by the zones + error caculation.
Cascade algorithm type power, the setpoint sent to the running boiler is :
Power; accordingly PI algorithms.
Temperature; -90°C
Fig.130 Parallel cascade control
management
AD-3000961-01
4
0
8
4
x
8
-3K
+3K
4
3
2
1
7 Operation
26
7698983 - v.02 - 17102018
Содержание Quinta Ace SCB-01
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