Linking Up The Vst 317-2 Power Source To The Vario 8 Wirefeeder; Mounting / Connecting The Gas Cylinder; Mounting The Welding Torch; Mounting The Wire Spool - Fronius VST 247 Operating Instructions Manual

The machine is factory-connected for 400 V. This means that thanks to its
+/-10% tolerance range, the machine can also be run on the 380 V~ or
415 V~ mains.
Warning! If the machine is designed to run on a special voltage, the
Technical Data shown on the rating plate apply. The mains plug and
mains supply lead, and their fuse protection, must be dimensioned
accordingly.
LINKING UP THE VST 317-2 POWER SOURCE TO THE
VARIO 8 WIREFEEDER
On the VST 317-2 welding machine, the power source must be linked to the
wirefeeder by the interconnecting cable. VST 247 / 317 users may leave out
this section and continue reading the next section, headed "Mounting and
connecting the gas cylinder".
- Shift the mains switch to the "0" position
- Place the Vario 8 wirefeeder on top of the VST 317-2 power source
- Unscrew the housing from the wirefeeder
- Push the interconnecting cable through the lead-through
the right way around (do not cross over or kink any of the leads)
- Using the 8-pole Molex plug, plug the control lead onto board MR 25A ,
the right way around, and latch firmly
- Connect the two leads from the 8-pole Molex plug to the horizontal
connections of the gas solenoid valve
- Using an Allen screw, firmly screw the 35mm² cable to the central
connector
- Fix the strain-relief clamp to the interconnecting cable
- Screw the housing of the wirefeeder back on again
- Plug the shielding-gas plug of the interconnecting cable to the shielding-
gas connector of the wirefeeder
- Insert the plug of the interconnecting cable into the interconnecting cable
current socket on the power source and latch it firmly
- Plug the control plug into the interconnecting-cable socket
source, the right way around, and latch it firmly
- Take the left side panel off the power source
- Pass the gas connection for the gas cylinder in through the lead-through
in the housing and out again through the lead-through at the back of the
power source
- Fit the left side panel back onto the power source
Fig.12 Rear view of Vario 8 wirefeeder
in the housing,
on the power
Fig.13 Close-up view of Vario 8
wirefeeder (from above)

MOUNTING / CONNECTING THE GAS CYLINDER

- Stand the cylinder on the platform of the power-source trolley
- Fix the gas cylinder in place with both safety chains
N.B.! The cylinder is only fixed properly if the chains are placed around the
top part of the cylinder (but not around the neck of the cylinder)
- Take off the protective cap from the cylinder
- Give the cylinder valve a quick turn to the left so as to blow off any dirt
that may have accumulated
- Check the seal on the pressure regulator
- Attach the pressure regulator to the gas cylinder and tighten it
- Link up the shielding gas connector
of the gas hose

MOUNTING THE WELDING TORCH

- Shift the mains switch
- Check that the torch is fitted with the correct equipment. Insert it - infeed
tube first - into the central torch connection socket
power source or (VST 317-2 only) on the Vario 8 wirefeeder
- Fix by tightening the swivel nut by hand
- Plug the torch control plug into the torch control socket
/ 317 power source or (VST 317-2 only) on the Vario 8 wirefeeder

MOUNTING THE WIRE SPOOL

- Shift the mains switch
- Open the left side panel of the power source or the spool cover of the
wirefeeder
- Mount the wire spool onto the spool holder
- Latch the locking bolt into the opening provided on the body of the spool
- Adjust the braking force with the clamping screw
- Close the wire-spool cover or side panel again
N.B.! The brake should always be adjusted so that the wire does not continue
unreeling after the end of welding - but without overtightening the clamping
screw, as this would cause motor overload.

FEEDING IN THE WIRE ELECTRODE

- Shift the mains switch
- Open the left side panel of the power source or the housing of the wirefeeder
- Pivot the clamping device
- Pull the pressure lever
- Insert the wire electrode though the infeed tube
of the 2-roller drive and around 5 cm into the infeed tube of the welding torch
- Push the pressure lever
- Pivot the clamping device
- Set the contact pressure by means of the clamping nut
N.B.! Set a contact pressure that is high enough to ensure smooth wire feed,
but not so high that the wire electrode is deformed.
- Arrange the hosepack in as straight a line as possible
- Detach the gas nozzle from the torch
- Unscrew the contact tube
- Plug in the mains plug
- Shift the mains switch
Warning! During the wire-infeed operation, hold the welding torch
facing away from your body.
10
to the pressure regulator, by means
into the "O" position
on the VST 247 / 317
on the VST 247
into the "O" position
the right way around
into the "O" position
forwards
upwards
and the drive roller
downwards
into the vertical position
into the "I" position