Tweco 500P PowerMaster - Manual (Page 25)

POWERMASTER 500, 500P, 350
Manual No. 0-4749 3-1 INSTALLATION
SECTION 3:
INSTALLATION
3.01 Location
Adequate air circulation is needed at all times in order to
assure proper operation. Provide a minimum of 12 inches
(305 mm) of free airspace on all sides of the unit. Make
sure that the ventilator openings are not obstructed.
Ventilation air flow is from rear to side.
3.02 Voltage Changeover
For proper operation and to prevent damage to the
machine, the voltage changeover must be set according
to the incoming AC line voltage. Remove the left side panel
of the machine to gain access to the voltage changeover
board. Set the links to agree with one of the four available
voltage settings. (See Figures 3-1 through 3-4).
The four settings are:
200 VAC 230 VAC
400VAC / 380VAC 460 VAC
1. Check the name plate of the machine for proper line
voltage.
2. Move the voltage links by loosening the nuts
securing the links in place. For 200 and 230 VAC
settings place the two links in the 200/230V positions.
For 380 /400 and 460 VAC settings place the two links
directly on top of each other in the 400/460V
position. See figures 3-1 through 3-4. Make sure that
the connections are properly tightened.
DANGER
ELECTRIC SHOCK CAN KILL.
Open the main wall disconnect switch or
breaker, before removing any covers or
access panels on the welding machine. Live
voltage is still present even with the front panel
control switch OFF. Wait at least three full
minutes after power has been removed
before removing any covers or access panels
to allow adequate time for internal capacitors
to discharge.
E4
200 VOLT CONNECTION
460
E2
400
E3
230 460
E1
400
Art # A-04083
Figure 3-1
230 VOLT CONNECTION
400
460
E2 E3
E4
E1
460
200
400
Art # A-04084
Figure 3-2
E4
380 / 400 VOLT CONNECTION
200 200
E2
230
E3
230
E1
230 460
200
Art # A-04085
Figure 3-3
460 VOLT CONNECTION
200 200
E2
230
E3
230
E4 E1
230
200
400
Art # A-04086
Figure 3-4