Fronius FK 5000, Operating Instructions Manual

Page: 24 / 60

24
Options
General The options listed below are available for all cooling unit variants.
Coolant tempera -
ture monitoring
and flow monitor -
ing
Coolant filter The coolant filter is equipped with a CrNi screen, and its function is to filter dirt particles
above 150 micrometers 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.
Front coolant
connections
The front coolant connections allow the cooling unit to be used in conjunction with power
sources with an integrated wire drive (compact power sources).
Duo filter mount -
ing / coolant con -
nections
The kit adds two additional coolant connections to the cooling unit. This allows the coolant
filter to be mounted on the rear in a protected location and the welding torch to remain con -
nected to the front as usual (compact power sources).
Coolant temperature monitoring and flow monitoring are parts of an installation set and
cannot be ordered separately.
Coolant temperature monitoring
A temperature sensor monitors the coolant return temperature during welding.
How it works:
- If the temperature of the coolant exceeds 70 °C (158 °F):
- the wire-feed unit/power source outputs the service code "hot l H2O"
- the temperature sensor interrupts the welding current
- the cooling unit remains operational
- The temperature sensor restores the welding current when the coolant temperature
falls to 65 °C (149 °F)
Flow monitoring
A flow sensor monitors the coolant flow during welding.
How it works:
- If the coolant flow drops below 0.7 l/min (0.18 gal./min)
- the wire-feed unit/power source outputs the service code "no l H2O"
- flow rate monitoring interrupts the welding current
- the cooling unit is switched off