Centroid 13126, Install Manual

Page: 39 / 86

5.7 W
IRING
C
OOLANT
P
UMP
By default, Output 3 on the Oak Board is the coolant flood pump output.
If you have mist, refer to the schematic for how to wire it.
Figure 5.7.1 shows how to hook up a 3 phase Flood Pump. A Contactor (Centroid PART# 3959) is needed, shown in the figure.
If you do not have access to 3 phase, refer to Tech Bulletin 163:
(
http://www.centroidcnc.com/dealersupport/tech_bulletins/uploads/163.pdf )
All contactors need a snubbers. Centroid recommends using the Quencharc snubber network (Centroid PART# 1819) on the coil
of the contactor.
Centroid requires a thermal overload protector to protect the motor. The example diagram below depicts the 24VAC wired through
the normally closed contacts on the overload section of the contactor. The overload protection circuit on your existing contactor
may be labeled differently.
Page 39 of 86 Chapter 5 Electrical Cabinet Wiring
Figure 5.7.1
Sample Coolant Pump Circuit