Fronius FK 4000 - Application Areas; FK 4000 Cooling Unit Compatibility; FK 4000 R Series Welding Applications

- The thermostat option monitors the coolant temperature
- If the coolant temperature rises to above 70°C (185°F), the "hot | H2" indicator is
automatically displayed and the welding current is interrupted. The cooling unit
remains operational
- The thermostat restores the welding current when the temperature falls to 65°C
(149°F).
Coolant filter The coolant filter is equipped with a CrNi screen; its function is to filter dirt particles
above 100 micrometres in size from the coolant. This ensures that no coarse dirt
particles can pass into the coolant circuit. The coolant filter is fitted to the coolant return
connection on the cooling unit.
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