16. Wiring Auxiliary Sub-systems
2. Coolant Pump Wiring
Coolant Flood Pump Sub-circuit Diagram
This sub-circuit shows how to hook up a 3 phase Flood Pump. Because the
pump draws higher current at 220V a Flood Contactor PART# 3959 is
needed. Notice the Quencharc PART# 1819 on the coil of the contactor, this
prevents electrical noise when the coolant flood is cycled on and off. A
thermal overload is also shown, this part protects the motor by opening the
circuit if it stalls for any reason, such as dips in the pump.
NOTE:
This diagram depicts the 24VAC wired through the NC contacts on
the overload section of the contactor. The overload protection circuit on your
existing contactor may be labeled differently or there may be no overload
protection.
