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20
WIRING DIAGRAM
20
SQUARE WAVE TIG 175
NC
W 201
U 210
W 221 (+)
R 222 (-)
R2
R 209
H3 (380V)
L10808
217
T1
H1
DC+
FAN
244A
233
233
276
275
(REAR VIEW,
B
(-)
(+)
R5
MODE SWITCH
R1
2 STEP TIG
4 STEP TIG
240
POWER "ON" LIGHT
231
115VAC
B
POLARITY
SWITCH
(-)
D1
W 221
R 222
F
277A
244A
244B
A
NO
TOROID
CLOSED
OPEN
CLOSED
G
B X7
W X6
18VAC
W X5
B X4
18VAC
232
F1
B
B 230
W 204
H2 (240V)
232B
232A
220
E
STICK
BYPASS
PC BOARD
L1
BYPASS/
415 VOLT CONNECTION (AS SHOWN)
SCR4
CONNECT COPPER LINK FROM POWER
SWITCH STUD TO H4. TIGHTEN NUTS.
380 VOLT CONNECTION
CONNECT COPPER LINK FROM POWER
SWITCH STUD TO H3. TIGHTEN NUTS.
240 VOLT CONNECTION
CONNECT COPPER LINK FROM POWER
244
SWITCH STUD TO H2. TIGHTEN NUTS.
278
279
CURRENT
OUTPUT
235
234
AMPTROL
REMOTE
236
RECEPTACLE
238
REMOTE
SV1
E
C
S
ARC STARTER AS’BLY
L4
T3
115VAC
S3
243
VOLTAGE RECONNECTION
{
WIRING DIAGRAM - SQUARE WAVE TIG 175 (240/380/415/1/50/60)
G1
G2
X1
F
W X3
POS
STABILIZER
R4
217
G1
218
G2
G3
220
216
G4
277
B X8
D
FRONT GANG
SCR2
C
SCR3
BYPASS PC BOARD MUST ALWAYS BE
CONNECTED ACROSS POWER SWITCH.
L2
G4
218
J4
ELECTRICAL SYMBOLS PER E1537.
F
R 277A
216
H4
H3
H2
E
C3
SPARK
X1
278
276
J3
J2
J1
242
280
J4
A
10K A-B
J5
AT MINIMUM
209
210
230
238
234
235
L2
R
U
B
W
R3
S2A
TL1
SHOWN IN AC POSITION)
Y
H
B-D, A-E, C-F, G-H
B-D, C-E, A-F, G-H
A-C, D-E, B-F
H4 (415V)
POLARITY SWITCH MICRO SWITCH
DC-
AC
A
F
L1
A
D
C4
D
C
BB
236B
T4
E
J6
204
201
236
B 242
W
W
S2
B
243
CURRENT
244
280
B-RW
START/CRATER
237
231
275
277
SLOPE
DOWN
G3
H1
B
236A
C
TM
GAP
D
B 232B
236A
THERMAL LIGHT
240
281
279
312
281
78VAC
X2
S
F
115VAC
S
SCR1
PC BOARD
PL1
314
313
L3