Page 14
NOTE:
Whether valve power is supplied by the Valve transformer or by an external valve
power supply, the maximum current that can be switched by the firing board is 1
AMP per valve. If more current is desired, the valve circuit should be wired to a
relay having a suitable contact rating to switch the desired valve. For more
information, refer to CUSTOMER WIRING DIAGRAM.
)86,1*
CONTROL FUSE-
This fuse, a BBS 6/10 AMP, is used to protect the control circuits. The
fuse holder is located in the upper left corner of the contactor door
opening or within the S cabinet.
VALVE FUSE-
These fuses, a 2AG 1 AMP, are used to protect the valve circuits. The
fuses are located on the TERMINAL STRIP PCB, PCB2 Assembly
Number 410319 or 410319-001.
IGNITOR FUSES-
(Supplied with ignitron tube retrofit controls only). These two fuses,
BAF 6 AMP, are used to protect the ignitor circuits to the ignitron
tubes. The fuse holders are located on the IGNITRON FIRING
BOARD MODULE PCB3 Assembly Number 410318.
INSTALL PROPERLY SIZED FUSES IN SERVICE
DISCONNECT SWITCH. CHECK WELDING MACHINE
MANUFACTURER'S RECOMMENDATIONS.
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