FRO­NIUS MTG 320i US Style User manual

Fronius prints on elemental chlorine free paper (ECF) sourced from certified sustainable forests (FSC).
/ Perfect Charging / Perfect Welding / Solar Energy
42,0410,2329 005-02062020
MTG 320i US Style
MTG 400i US Style
MTG 270i US Style
MTG 320i US-Style
MTG 400i US-Style
MTG 270i US-Style
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Operating Instructions
MIG/MAG manual welding torch
Manual de instrucciones
Antorcha manual MIG/MAG
Instructions de service
Torche de soudage MIG/MAG ma-
nuelle
ENESFR

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EN
Contents
Safety......................................................................................................................................................... 5
Proper use ............................................................................................................................................ 5
Safety.................................................................................................................................................... 5
General ...................................................................................................................................................... 6
General ................................................................................................................................................. 6
Available versions................................................................................................................................. 6
Available central connectors................................................................................................................. 7
Installation and commissioning .................................................................................................................. 8
Fitting wearing parts to the torch body.................................................................................................. 8
FSC: Fitting the inner liner inside the torch hosepack .......................................................................... 9
OC (Euro, Miller, SKS): Fitting the inner liner inside the torch hosepack ............................................ 10
OC (Lincoln, Hobart): Fitting the inner liner inside the torch hosepack ................................................ 11
Connecting the welding torch to the wirefeeder.................................................................................... 12
Connecting the welding torch to the power source............................................................................... 12
Care, maintenance and disposal ............................................................................................................... 14
General ................................................................................................................................................. 14
Recognising faulty wearing parts.......................................................................................................... 14
Maintenance at every start-up .............................................................................................................. 14
Maintenance every time the wirespool/basket-type spool is changed.................................................. 15
Troubleshooting ......................................................................................................................................... 16
Troubleshooting .................................................................................................................................... 16
Technical data............................................................................................................................................ 21
General ................................................................................................................................................. 21
MTG 320i / 400i US Style ..................................................................................................................... 21
MTG 270i US Style machine welding torch .......................................................................................... 21

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EN
Safety
Proper use The MIG/MAG manual welding torch is intended solely for MIG/MAG welding in manual ap-
plications.
Any use above and beyond this purpose is deemed improper. The manufacturer shall not
be held liable for any damage arising from such usage.
Proper use includes:
- Carefully reading and following all the instructions given in the operating instructions
- Performing all stipulated inspection and maintenance work.
Safety WARNING!
Incorrect operation or poorly executed work can cause serious injury or damage.
► All activities described in these Operating Instructions may only be carried out by
trained and qualified personnel.
► All functions described in these Operating Instructions may only be used by trained and
qualified personnel.
► Do not carry out any of the work or use any of the functions described until you have
fully read and understood the following documents:
these Operating Instructions,
the enclosed "Safety rules" document,
all the Operating Instructions for the system components, especially the safety rules.
WARNING!
An electric shock can be fatal.
There is also a risk of injury from the emerging wire electrode. Before commencing any of
the work described in these Operating Instructions:
► Turn the power source mains switch to the "O" position
► Disconnect the power source from the mains
► Ensure that the power source remains disconnected from the mains until all work has
been completed
CAUTION!
Welding torch components that have become very hot during use can cause severe
burns.
► Before commencing any of the work described in these Operating Instructions, allow
all welding torch components to cool to room temperature (+25 °C, +77 °F).
CAUTION!
Risk of injury and damage from loose connections.
► All cables, lines and hosepacks must be properly connected, undamaged, correctly in-
sulated and adequately dimensioned at all times.