Miller Electric KC237900 User Manual
Page 11
OM-530 Page 7
f.
Cut off and discard existing connectors on Elec-
troslope leads 58 and 59.
CAUTION: SOLDER can damage unit.
•
Do not allow solder to fall into unit.
•
Cover exposed area of unit when soldering
connections.
•
Remove cover(s) and clean unit when fin-
ished soldering.
g.
Splice and solder Electroslope lead 59 to lead
59. (Make connection near Preflow Circuit
Board.) Insulate connection with tape.
h.
Connect lead 58, originating at Preflow Circuit
Board, to terminal 4 of relay CR2.
i.
Splice and solder Electroslope lead 58 to lead
58. (Make connection near terminal 4 of relay
CR2.) Insulate connection with tape.
10. Secure leads to existing harness with nylon cable
ties or tape to maintain a proper lead dress.
11. Reinstall cover onto TIG-Unit.
Terminal
Strips
1T
Lifting
Eye
Front Center
Mounting Panel
Front Of
Tig-Unit
Terminal
Strip 2T
Lead 60 From
Electroslope
Relay CR2
Primary Connection
Terminal Strip TE1
ST-081 854-C
TOP VIEW
Figure 3-2. Location Of Relay CR2 And Other
Components
3-7. PROCEDURE FOR REMOTE TIG-UNIT IN-
STALLATION
WARNING: ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Shut down welding power source, and dis-
connect input power employing lockout/tagging
procedures before inspecting or installing.
Lockout/tagging procedures consist of pad-
locking line disconnect switch in open position,
removing fuses from fuse box, or shutting off
and red-tagging circuit breaker or other discon-
necting device.
1.
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 (Section
3-4, Procedure B), and should be discarded when a 115
volts ac external power supply is used.
2.
Make up cord (16/3 is recommended) of the neces-
sary length to connect to a 115 volts ac power sup-
ply. (The 230 volts procedure from Section 3-4, Pro-
cedure B must not be employed.)
3.
Route cord through supplied connector on rear of
TIG-Unit, and attach it to terminals 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 the terminal
strip and must be used.
CAUTION: LACK OF GROUND CONNEC-
TION will damage the Pulser.
•
Ground TIG-Unit back to welding power
source or to a good building ground whenever
TIG-Unit is separated from welding power
source.
4.
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.
5.
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) with plug
attached through access opening on left side of
TIG-Unit. Connect extension cord (not supplied; op-
tional) to short cord from TIG-Unit, and then con-
nect plug (remaining end) to REMOTE 14 (Amper-
age And Contactor Control) receptacle on welding
power source; align keyway, insert plug, and rotate
threaded collar clockwise.
6.
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.
7.
Ensure that the AMPERAGE control switch and
OUTPUT(CONTACTOR) switch on welding power
source are both in the REMOTE position.
8.
Open access door on front of welding power source,
and remove welding cables from the output termi-
nals.
9.
Reinstall welding cables to proper output terminals
on front of TIG-Unit (labeled ELECTRODE and
WORK).
10. Route welding cables (labeled POSITIVE and
NEGATIVE) from rear of TIG-Unit in direction of
welding power source.
11. Connect (with bolts) power cables (not supplied) of
adequate size and length to the welding cables of
the TIG-Unit, and then connect the remaining ends