Operation Manual

12
A7 MIG Gun 500-w© Kemppi Oy 2017 1712
OPERATING MANUAL
11.4 Connecting the gun system to the wire feeder
This section describes how to connect the gun system to the wire feeder.
Figure 7: Connecting the gun system to the wire feeder
4
5
8
Proceed as follows:
1. Check again that the wire guide has been attached correctly. See the gure
above.
2. Mount the central connector (5) on the wire feeder, and secure it with the
connection nut (4).
3. Fasten the air-blast hose (8) to the air-blast and spraying unit or the air-blast
valve. Seal the connection gas-tight if the "Air-blast" option will not be in use.
11.5 Connecting the coolant
This section describes how to connect the coolant.
Risk of burns
The A7 MIG Gun 500-w cable assembly will become overheated if the coolant level
is too low.
• Wear protective gloves.
• Check the coolant level at regular intervals.
Make sure that the coolant supply and return have been installed properly.
Coolant supply = blue, coolant return = red.
• Do not use any de-ionized or de-mineralized water as coolant or for tightness or
ow tests. This may shorten the service life of your welding gun.
• We recommend the use of a Kemppi-brand cooling liquid for liquid-cooled
welding guns.
Figure 8: Connecting the coolant
1
4
5
3
2
1. Control lead
2. Coolant ow hose
3. Compressed air hose
4. Coolant return hose
5. Cable assembly
Ventilate the entire cooling system before it is used for the rst time and after every cable
assembly change.
Proceed as follows:
1. Disconnect the coolant return hose (4) from the re-circulating cooling unit, and hold
it over a collecting device.
2. Close the opening at the coolant return hose (4), and open it again by abruptly
releasing it. Repeat this action until the coolant is owing into the collecting device
continuously and without air bubbles.
3. Switch o the re-circulating cooling unit, and reconnect the coolant return hose (4).