Overload Protection - Lincoln Electric WELD-PAK 3200HD Operator's Manual

B-6
The WELD-PAK 3200HD is suitable for .035" alu-
minum wire and .030" stainless wire. Refer to Table
B.1 for recommended procedure settings (requires
K499 Argon Regulator Kit).
TABLE B.1
Shielding
Process Welding Wire Gas
MIG DC+ .035 Dia 100% Argon
4043 Aluminum
Wire
MIG DC+ .035 Dia 100% Argon
5356 Aluminum
Wire
MIG DC+ .030 Dia 98% Argon/
308L Stainless 2% Oxygen
Steel Wire
CHANGING MACHINE OVER TO
FEED OTHER WIRE SIZES
The WELD-PAK 3200HD is shipped from the factory
ready to feed 023"-.025" (0.6 mm) diameter wire. To
operate the WELD-PAK 3200HD with other sizes of
wire, it is necessary to change the contact tip and
change the drive roll over to other sizes. Refer to
Changing the Contact Tip and Changing the Drive
Roll, in the MAINTENANCE section, for specific infor-
mation on these procedures.
WELDING WITH GMAW (MIG)
Shielding Gas
When using the GMAW process, obtain and install a
gas regulator and hose kit; K463 (for CO 2 ) or K499
(Argon mixed) gas regulator and hose kit.
1. For CO 2 , open the cylinder very slowly. For argon-
mixed gas, open cylinder valve slowly a fraction of
a turn. When the cylinder pressure gauge pointer
stops moving, open the valve fully.
OPERATION
Voltage/Wire Speed
16 ga 14 ga 12 ga 10 ga
B-5 D-7 D-9 D-9
B-5 C-7 D-9 D-10
A-3 C-6 D-7.5 D-7.5
WELD-PAK 3200HD
2. If using a regulator with an adjustable flow meter,
close the gun trigger and adjust the flow to give 15
– 20 cubic ft per hour (CFH) (7 – 10 I/min) [use 20
– 25 CFH (10 – 12 I/min) when welding out of
position or in a drafty location for CO 2 ]. For argon
mixed gas, trigger to release gas pressure, and
adjust the flow to give 25 – 30 CFH (12 – 14
I/min).
3. Keep the cylinder valve closed, except when using
the WELD-PAK 3200HD. When finished welding:
a) Close the cylinder valve to stop gas flow.
b) Depress the gun trigger briefly to release the
pressure in the gas hose.
c) Turn off the WELD-PAK 3200HD.
WELDING WITH FCAW (Innershield)
When using the FCAW process, the correct drive roll
and electrode polarity must be used. See Work Cable
Installation in INSTALLATION section for changing
the polarity.

OVERLOAD PROTECTION

Output Overload
The WELD-PAK 3200HD is equipped with a circuit
breaker and a thermostat which protects the machine
from damage if maximum output is exceeded. The cir-
cuit breaker button will extend out when tripped. The
circuit breaker must be manually reset.
Thermal Protection
The WELD-PAK 3200HD has a rated output duty
cycle of 20%. If the duty cycle is exceeded, a thermal
protector will shut off the output until the machine
cools to a reasonable operating temperature. This is
an automatic function of the WELD-PAK 3200HD and
does not require user intervention. The fan continues
to run during cooling.
Electronic Wire Drive Motor Protection
The WELD-PAK 3200HD has built-in protection for
wire drive motor overload.
B-6