Polarity Changeover - Firepower FP-125 Operating Manual

FIREpOwER Fp-125, 135, 165

3.08 Polarity Changeover

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
removing the leads from the terminals and revers-
ing them if necessary. Refer to Figure 3-4.
4. Replace the polarity terminal knobs.
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
removing the leads from the terminals and revers-
ing them if necessary. Refer to Figure 3-5.
4. Replace the polarity terminal knobs.
Ensure that polarity terminal knobs are tightly
secured and that there is no connection be-
tween positive and negative terminals.
Manual 0-5123
POLARITY
1. DCEP – Reverse Polarity
2. DCEN – Straight Polarity
Table 3-1: Process Cable Connections
NOTE
NOTE
WARNING
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
Polarity
Terminal
Knobs
Polarity
Terminal
Leads
Figure 3-5: Connection for FCAW (straight polarity
3-6
INSTALLATION
CABLE TO WORK
1. Connected to (-)
Neg. output terminal
2. Connected to (+)
Pos. output terminal
Gas Hose
Normally
Connected
Art # A-09080
DCEP)
Gas Tube
Normally
Disconnected
Art # A-09081
DCEN)
Installation