ESAB Arc 4000i Service Manual page 24

5 Cooling unit
Component description, water cooling unit
5C1 Start and run capacitor for the fan motor, 5 mF 450 V AC.
5C2 Start and run capacitor for the pump motor, 3 mF 400V.
5EV1 Fan motor, 230 V AC.
5M1 Pump motor, 230 V AC.
5S1 Microswitch for the water lock connection.
5SL1 Water flow guard. The contact closes for flow rates of 0.7 l/min and over.
Note! This is an accessory.
5ST1 Temperature sensor switch. Closes at 45 °C, opens at 35 °C.
Wiring diagram for the cooling unit
The power supply to cooling water pump 5M1 and fan 5EV1 is controlled by the machine
software in the welding data unit. See 20AP2:5 on page 46. The fan is connected in parallel
with the pump, and is controlled by temperature sensor switch 5ST1.
ct32_05
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S0740 800 191/E080229/P78