Miller Electric KC237900 - Manual (Page 14)

OM-530 Page 10
l. Connect lead 58, originating at the preflow cir-
cuit card, to the terminal on CR2 where lead 59
was removed in Step j.
m. Locate terminal JJ on electroslope circuit card.
Route supplied lead 58, through the grommet in
the electroslope box and connect it to terminal
HH on the electroslope circuit card. Connect re-
maining end of lead 58 to CR2 in addition to ex-
isting lead 58.
n. Replace electroslope box cover.
o. Cover all splices with electrical tape. Tape or tie
new or unused leads to existing wiring har-
nesses.
p. Replace left side panel and top cover.
3-9. FIELD INSTALLATION OF OPTIONAL SPOT
TIMER (Figure 3-3)
WARNING: ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Shut down welding power source, and dis-
connect input power employing lockout/tagging
procedure before beginning this installation.
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.
IMPORTANT: All directions, such as left or
right, are with respect to the operator facing the
welding power source front panel. Retain all
hardware removed during this procedure for re-
installation.
A. Mechanical Installation (Figure 3-3)
1. Remove TIG-Unit top cover and both side panels.
2. Mount Spot Time switch S201 in the 1/2 in. (12.7
mm) diameter hole using supplied hardware.
3. Mount Spot Time control with attached printed cir-
cuit card assembly TD3 in the 3/8 in. (9.5 mm) diam-
eter hole using supplied hardware.
4. Affix supplied SPOT TIME label to front panel over
both controls.
5. Attach supplied knob to Spot Time control shaft.
B. Electrical Installation (Figure 3-2)
IMPORTANT: Before preceeding with this installation
familiarize yourself with the circuit diagram provided in
this manual.
For All Models:
1. Remove jumper link 5 from terminals 33 and 88 on
terminal strip 1T.
2. Connect lead 32 from spot time assembly to termi-
nal 32 on 1T.
3. Connect lead 89 from spot time assembly to termi-
nal 89 on terminal strip 2T.
4. Connect lead 88 from spot time switch S201 to ter-
minal 88 on 1T.
5. Connect lead 33 from S201 to terminal 33 on 1T.
6. Tape or tie new leads together to maintain a proper
lead dress inside the unit.
7. Replace both side panels and top cover.
3-10. REMOTE 14 RECEPTACLE INFORMATION
AND CONNECTIONS (Figure 3-4 And Figure 4-1)
REMOTE 14
AMPERAGE A
OUTPUT
(CONTACTOR)
REMOTE 14 receptacle RC2 is used to connect any of
the following equipment to the welding power source cir-
cuitry:
a. Remote Contactor
b. Remote Amperage control
c. Combination of the above.
To make connections, align keyway, insert plug, and ro-
tate threaded collar fully clockwise.
The following socket information is included in case the
supplied cord is not suitable, and it is necessary to wire a
plug or cord to interface with REMOTE 14 receptacle
RC2.
IMPORTANT: When contact closure is provided be-
tween sockets A and B, the welding power source out-
put/contactor control circuit is energized.
Receptacle RC2 socket connections to the TIG-Unit
control circuitry are as follows;
Socket A: Contactor control switch connection.
Socket B: Contactor control switch connection.
Socket C: Amperage control connection (maximum
side).
Socket D: Amperage control connection (minimum
side).
Socket E: Amperage control connection (wiper con-
tact).
IMPORTANT: The remaining sockets in the receptacle
are not used.