100i / 200i / 300i / 400i
64 INSTALLATION Manual PN: 0560956430
3.22 External Cooler
Used in series with the existing cooling system of the 400i series power supplies, the External Cooler provides necessary addi-
tional water cooling for the torch head when cutting at over 300amps. The External Cooler fan is thermally controlled to operate
whenever the fan and pump is on and the coolant temperature is above a predetermined level. It may come on anytime while the
main pump is operating.
!
WARNING
Do not disassemble the Cooler with the power applied or the coolant flowing.
Dangerous 220 AC voltages and high pressure liquid are present.
Locate the Cooler so that there is adequate ventilation in front of and behind the unit and do not place or stack anything on top
of the unit.
2’ (0.6 m)
2’ (0.6 m)
3”
76 mm
3”
76 mm
Art # A-12813
NOTE!
Ensure the four coolant lines described below are connected and leak free before connect-
ing power to J71.
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