Output Connections; Connections For Tig (Gtaw) Welding; Tig Torch Connections; Work Cable Connections - Lincoln Electric SQUARE WAVE IM687 Operator's Manual

A-4
FOR LOWEST RATED VOLTAGE
: H2 CONNECTED
FOR HIGHEST RATED VOLTAGE
: H3 CONNECTED
FIGURE A.1 Reconnect Leads

OUTPUT CONNECTIONS

FIGURE A.2 Location of Output Connections

CONNECTIONS FOR TIG (GTAW) WELDING

TIG TORCH CONNECTION
Refer to Included Equipment in the Operation Section
of this manual for TIG welding equipment which is
included with the SQUARE WAVE TIG 175 PRO.
INSTALLATION
LEAD H1
(DO NOT
REMOVE)
INPUT LEADS
L1 & L2
BACK VIEW OF LINE SWITCH
ELECTRODE/GAS OUTLET
RECEPTACLE
WORK CABLE & CLAMP
SQUARE WAVE TIG 175 PRO
A TIG welding torch with cable and connector is sup-
plied with the welder. Turn the Power Switch "OFF".
Connect the torch cable quick connect plug into the
Electrode/Gas Output Receptacle on the front of the
welder and turn it clockwise until it is tight. This is a
quick connect terminal and also provides the gas con-
nection for the shielding gas to the torch.
WARNING
To avoid receiving a high frequency shock, keep
the TIG torch and cables in good condition.
__________________________________________
WORK CABLE CONNECTION
A work cable with attached work clamp is factory con-
nected to the SQUARE WAVE TIG 175 PRO. To min-
imize high frequency interference, refer to Machine
Grounding and High Frequency Interference
Protection section of this manual for the proper pro-
cedure on grounding the work clamp and work piece.

SHIELDING GAS CONNECTION

An adjustable gas pressure regulator and flow gage is
supplied with the SQUARE WAVE TIG 175 PRO.
Obtain the necessary inert shielding gas (usually
argon). Connect the cylinder of gas with the pressure
regulator and flow gage. Install the gas hose between
the regulator and gas inlet (located on the rear of the
welder). The gas inlet has a 5/16-18 right hand female
thread; CGA #032.
The optional undercarriage features a pivoting platform
that simplifies loading and unloading of gas cylinders.
WARNING
CYLINDER could explode
if damaged.
• Keep cylinder upright and
chained to a support.
• Keep cylinder away from areas
where it could be damaged.
• Never allow the torch to touch the cylinder.
• Keep cylinder away from live electrical cir-
cuits.
• Maximum inlet pressure 150 psi.
___________________________________________
A cylinder is loaded by leaning it slightly sideways and
rolling it toward the platform. The cylinder's weight will
push the platform downward against the floor, forming
a ramp. At this point, the cylinder may be rolled up the
platform into its final position. Secure the cylinder in
place with the provided chain. Unload by following
A-4