27
EN
OPT/i WF gas test 
& wire threading
NOTE!
Risk when retracting the wire electrode.
No winding onto the wirespool.
► Do not allow long lengths of wire electrode to be retracted, as the wire electrode is not 
wound onto the wirespool when retracted.
If there was a ground earth connection with the contact tip before the wire retract 
button was pressed, the wire electrode will be retracted when the button is pressed 
until it is short-circuit-free - it retracts by no more than 10 mm (0.39 in.) with each 
press of the button.
If the wire electrode still needs to be retracted further, press the wire retract button again.
No. Adjuster functions during TIG welding
(1) Setting the welding current
(2) Not active
No. Function
(1) OPT/i WF gas test & wire threading
(2) Operating status LED
lights up green when the device is 
ready for use
(3) Gas-test button
for setting the required gas flow rate 
on the pressure regulator
- Gas will flow out for 30 seconds 
after the gas-test button is 
pressed. Press the button again 
to stop the gas flow prematurely
No. Function
(4) Wire retract button
to retract the wire electrode with no accompanying flow of gas or current
The wire electrode can be retracted using one of two methods:
Method 1
Retracting the wire electrode using the preset wire retract speed:
- Press and hold the wire retract button
- The wire electrode will be retracted 1 mm (0.039 in.) after the wire retract but-
ton is pressed
- After a short pause, the wirefeeder continues to retract the wire electrode. If 
the wire retract button remains pressed, the speed will increase every sec-
ond at a rate of 10 m/min (393.70 ipm) until the preset wire retract speed is 
reached 
Method 2
Retracting the wire electrode in 1 mm increments (0.039 in. increments) – always 
press the wire retract button for less than one second (tap)