Lincoln Electric IM990 MAGNUM PRO 350 and 550 FUME GUNS - Manual (Page 10)

A-3 INSTALLATION
MAGNUM™ PRO 350 and 550 FUME GUNS
A-3
COMPATIBILITY OF WELDING
MACHINES AND WIRE FEEDERS
1. If the welding process requires welding gas (FCAW-
GS, GMAW, or MIG), then either the welding
machine or feeder must be equipped with a gas
solenoid valve to supply welding gas to the fume
gun.
2. A gas mixer and regulator is required upstream of
the gas solenoid valve to supply specified blends of
welding gas at the specified flow rate.
PREPARING THE FUME GUN FOR
WELDING
• Read all safety information: See the front of this
instruction manual. Perform the following sections in
the order shown.
Prepare the Welding Machine and Wire Feeder as
follows:
1. Read all safety information in all related instruction
manuals.
2. Disconnect input power to the machine and the wire
feeder.
3. Machine and feeder polarity settings: Set to match
the electrodeʼs polarity requirement per the instruc-
tion manuals.
4. Gas selection: Connect gas supply to either the
machineʼs or the feederʼs gas solenoid valve. Set
the gas mixer (if required) to the specified gas com-
position.
5. Gas flow rate: Set the supply regulator to deliver a
gas flow rate of 50 to 70 SCFH thru the fume gun.
SAFETY PRECAUTIONS
ELECTRIC SHOCK CAN KILL.
• Turn the input power OFF at the weld-
ing power source before installation
or changing drive rolls and/or guides.
• Do not touch electrically live parts.
• Magnum™ Pro Fume Guns When inching with the
gun trigger, electrode and drive mechanism are
"hot" to work and ground and could remain ener-
gized several seconds after the gun trigger is
released.
• Welding Machines, Wire Feeders, and Fume
Extraction Equipment--Read and understand the
equipmentsʼ instruction manuals and all hazard
warnings on equipment and in the manuals.
• Personal Protective Equipment--Wear
the proper personal protective equip-
ment for welding, including but not
limited to, safety glasses, hearing
protection, protective footwear, weld-
ing helmet, welding gloves, and weld-
ing leathers.
• This product shall not be used in precipitation, or
in wet or damp locations.
• Use these fume guns only with all consumable
parts properly installed in place.
• Do not use these fume guns for arc-gouging.
------------------------------------------------------------------------
WARNING
FIGURE A.4
6. Split Y connector halves allow the gunʼs feeder end
to be easily serviced.
7. Modular trigger terminal housing. May be easily
changed to dual-procedure (DP) harness.
8. Incoming connector assembly accepts existing wire
feeder connection K kits for Magnum 300, 400, and
550 guns.