Miller Electric KC237900 - Manual (Page 8)

OM-530 Page 4
side 115 volts ac power supply. The second method (B)
is to connect the TIG-Unit to 230 volts ac inside the
welding power source.
A. Procedure When Using An External 115 Volts
AC Power Supply
IMPORTANT: Read entire Section 8 on equipment that
produces output in the radio frequency range, such as
high-frequency starters, for site selection information
and installation requirements before beginning the in-
stallation procedures.
1. Remove the six sheet-metal screws from top cover
of welding power source (three from each end). It is
not necessary to remove the two screws next to lift-
ing eye (top cover of welding power source is not re-
moved).
2. Remove top cover from TIG-Unit, and lay it aside.
IMPORTANT: The TIG-Unit is shipped with two 5 ft. (1.5
m) leads (with terminal lugs attached) inside component
bag under front access door of TIG-Unit. These leads
are for 230 volts ac internal connections only (Proce-
dure B), and should be discarded when a 115 volts ac
external power supply is used.
3. Place TIG-Unit on top of welding power source
(controls facing same direction); lifting eye from
welding power source fits through bottom of TIG-
Unit (into U-shaped section at bottom of TIG-Unit’s
lifting eye bracket.)
4. Insert supplied 3/4 in. (19mm) diameter bolt (in bag)
through U-shaped section at bottom of TIG-Unit’s
lifting eye bracket and lifting eye of welding power
source; before securing bolt, align end hole in bot-
tom of TIG-Unit with end holes in top of welding
power source.
5. Install the six sheet-metal screws (removed in Step
1) into end holes to secure TIG-Unit to top of weld-
ing power source. Secure 3/4 in. (19mm) diameter
bolt.
6. Make up a cord (16/3 is recommended) of the de-
sired length to connect the 115 volts ac power sup-
ply.
7. Route cord through supplied connector on rear of
TIG-Unit, and attach it to terminal labeled 115V on
terminal strip TE1 located on center mounting panel
toward back of TIG-Unit (see Figure 3-2). (A ground
stud is provided at extreme rear end of this terminal
strip; use if desired.) Secure cord in connector.
8. Attach an appropriate plug to the remaining end of
the 115 volts ac cord.
WARNING: ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Do not connect the 115 volts ac plug to its
power supply until this entire installation is com-
plete and the TIG-Unit is ready to be put in oper-
ation.
9. Open access door on lower front of TIG-Unit, re-
move component bag, and route short intercon-
necting cord(approximately 4 ft or 1.2 m; see
Figure 3-1) with plug attached through access
opening on left side of TIG-Unit. Connect plug to
REMOTE 14 (Amperage And Contactor Control)
receptacle on welding power source; align keyway,
insert plug, and rotate threaded collar clockwise.
10. Attach plug from remote control cord (long cord, ap-
proximately 28 ft. or 8.5 m) to amphenol receptacle
on left side of TIG-Unit (under front access door);
align keyway, insert plug, and rotate threaded collar
clockwise. Route remote control cord through ac-
cess opening on left side of TIG-Unit to desired lo-
cation.
11. Ensure that the AMPERAGE control switch and
OUTPUT (CONTACTOR) switch on welding power
source are both in the REMOTE position.
12. Open access door on front of welding power source,
and remove welding cables from the output termi-
nals.
13. Reinstall welding cables to proper output terminals
on front of TIG-Unit (labeled ELECTRODE and
WORK).
14. Remove and discard bottom center sheet-metal
screw from right side panel of welding power
source.
15. Route welding cables (labeled POSITIVE and
NEGATIVE) from rear of TIG-Unit down right side of
welding power source (see Figure 3-1).
16. Slide supplied clamps (in bag) over welding cables,
and attach clamps with new sheet-metal screw (in
bag) to bottom center hole on right side panel of
welding power source; before securing sheet-metal
screw, route welding cables from rear of TIG-Unit to
output terminals under front access door on welding
power source; connect POSITIVE lead (No. 17) and
NEGATIVE lead (No. 12) to correspondingly la-
beled terminals on the welding power source (see
Figure 3-1).
17. If an Electroslope and/or Pulser is to be installed,
see Section 3-5 and/or 3-6, and install the desired
units at this point.
18. Reinstall cover onto TIG-Unit, and connect the nec-
essary associated equipment (shielding gas, water,
etc.).
B. Procedure When Using 230 Volts AC Internal
Power
IMPORTANT: Read entire Section 8 on equipment that
produces output in the radio frequency range, such as
high-frequency starters, for site selection information
and installation requirements before beginning the in-
stallation procedures.
1. Remove top cover from welding power source, and
lay it aside.
2. Remove top cover from TIG-Unit, and place it on
welding power source. Be sure that front of cover is