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3-9. Installing Mounting Brackets
Tools Needed:
1/4, 5/16 in
4-1. Controls
OM-629 Page 14
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SECTION 4 – OPERATION
1
2
1
Use existing screws from lower
edge of Maxstar wrapper and upper
edge of HF unit wrapper, and se-
cure notched brackets as shown.
1
1
Sets length of time gas flows before
arc starts.
2
3
Sets length of time gas flows after
welding stops.
3
Down position: Turns unit Off.
Middle position: Turns unit On
with no HF. Use for scratch start
GTAW or if Touch Start feature on
welding power source is used.
Up position: Turns unit On with HF
for arc starting only.
HF starts when the weld output
contactor is closed and an open-cir-
cuit voltage of 50 volts or more is
present. HF stops when arc starts.
If arc is not started within 5 seconds
after contactor closes, HF stops.
Close contactor again to resume
HF.
4
4
Place in Remote position if using re-
mote amperage control. Place in
Panel position if controlling amper-
age from welding power source
front panel.
This switch overrides welding pow-
er source remote/panel amperage
switch.
Notched Mounting Bracket
ST-800 295-A
Preflow Time Control
Postflow Time Control
Power And HF On/Off Switch
Remote/Panel Amperage
Switch
ST-800 293 / ST-801 480
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