Polarity Changeover - Firepower FP 125 Operating Manual & Installation Manual

FIREPOWER FP 125,135,165

3.08 Polarity Changeover

WARNING
ELECTRIC SHOCK CAN KILL! Make certain the machine is unplugged from the power receptacle. Do not
plug machine in until told to do so in these instructions
As delivered from the factory, the output polarity is set to the polarity which matches the welding wire supplied with the unit. The output
terminals are located on the interior panel of the welding power source if you need to change polarity.
PROCESS
1. GMAW – Solid Wire
2. FCAW – Self-shielding Wire – no
Shielding Gas
Connection for GMAW (reverse polarity DCEP)
1. Open the door to the machine.
2. Remove the polarity terminal knobs.
3. Set up the polarity (as per Table 3-1 above) by remov-
ing the leads from the terminals and reversing them if
necessary. Refer to Figure 3-4.
4. Replace the polarity terminal knobs.
NOTE!
Ensure that the polarity terminal knobs
are tightly secured and that there is no
connection between positive and negative
terminals.
Connection for FCAW (straight polarity DCEN)
1. Open the door to the machine.
2. Remove the polarity terminal knobs.
3. Set up the polarity (as per Table 3-1 above) by remov-
ing the leads from the terminals and reversing them if
necessary. Refer to Figure 3-5.
4. Replace the polarity terminal knobs.
NOTE!
Ensure that the polarity terminal knobs
are tightly secured and that there is no
connection between positive and negative
terminals.
INSTALLATION
POLARITY
1. DCEP – Reverse Polarity
2. DCEN – Straight Polarity
Table 3-1: Process Cable Connections
3-6
CABLE CONNECTIONS
CABLE TO GUN
1. Connected to (+) Pos.
output terminal
2. Connected to (-) Neg.
output terminal
Polarity
Terminal
Knobs
Polarity
Terminal
Leads
Figure 3-4: Connection for GMAW (reverse polarity DCEP)
Polarity
Terminal
Knobs
Polarity
Terminal
Leads
Figure 3-5: Connection for FCAW (straight polarity DCEN)
CABLE TO WORK
1. Connected to (-) Neg.
output terminal
2. Connected to (+) Pos.
output terminal
Gas Hose
Normally
Connected
Art # A-09080
Gas Tube
Normally
Disconnected
Art # A-09081
Manual 0-5123