Content
# Centrifuge pump control
![[Centrifuge_pump_control_Snapshot_1.jpg]]
Sludge pump 1 call is term 90 91
Sludge pump 2 call is term 88 89
However, both pumps are called by 88 and 89. Those energize the call relay in the sludge pump panel. That relay then energizes both call relays, CR8 and CR10.
CR5 calls P2 when hoa in auto
CR2 calls P1 when hoa in auto
Pumps are interlocked by grinder run signal through CR7 and CR9