LiftMaster GH GH-MECHANICAL Manual - Page 14

Three Phase Schematic Diagram

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1742-3 THREE PHASE SCHEMATIC DIAGRAM 230V BRAKE (WHEN PRESENT) 230V BRAKE (WHEN PRESENT) 575V BRAKE (WHEN PRESENT) BRN GY PUR YEL BRN BL/BK 1 74 2 85 3 96 O/L* BL/BK BRN GY PUR YEL BRN BL/BK 1 74 2 85 3 96 O/L* BL/BK GY BRN PUR BRN YEL BL/BK 1 2 O/L* 3 BL/BK 230 VOLT - 3 PHASE MOTOR CONNECTION L3 3 PHASE POWER IN L2 L1 3 STOP 4 (YEL) OPEN * - SEE NOTE #2 460 VOLT - 3 PHASE MOTOR CONNECTION OVERLOAD (SEE NOTE #2) (BK) CL (BK) (BK) 4 3 OP 4 3 OP 2 1 CL 6 5 (BR) EXTERNAL INTERLOCK 5 (BRN) (YEL) HAND CHAIN INTL'K SWITCH (WHEN PRESENT) NC C 14 OP 1 (OR) 13 (OR) 575 VOLT - 3 PHASE MOTOR CONNECTION OP 5 6 CL 1 2 (GY) (PUR) TO MOTOR (YEL) (BK) (BK) OVERLOAD (SEE NOTE #2) PRI. T1 (SEE NOTE #1) (BRN) (BRN) 24VAC SEC. (YEL) OPEN (OR) LIMIT SWITCH (OR) OP A1 A2 NC C WIRE NUT SAFETY EDGE AUX. CLOSE 10 (GY) LIMIT SWITCH NC C (GY) (OR) R1 (OR) (OR) (RED) R1 (RED) R3 (RED) OPEN & CLOSE 7 (YEL) C RADIO TO OPEN & CLOSE (OR) (YEL) R1 R2 CLOSE (PUR) (RED) TIMER TO CLOSE (OPTIONAL) (PUR) NC AUX. OPEN LIMIT SWITCH NO (PUR) 2 (PUR) 14 (RED) 13 (PUR) R1 (PUR) A2 CLOSE LIMIT SWITCH CL (PUR) A1 NC (PUR) C CL * - Shipped from Factory CLOSE CONTROL WIRING OPTIONS *C2 WIRING - Constant Presssure to Close RED WIRE ON TERMINAL #2 (Shipped from Factory) B2 WIRING - Momentary Contact to Close MOVE RED WIRE FROM TERMINAL #2 TO TERMINAL #3 NOTE: 1. Voltage same as line voltage 2. Overload in motor for models up to 3/4 Hp, located in limit box for 1 Hp and above. 14

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4
3
5
6
1
2
4
3
2
1
6
5
L3
L2
(GY)
(PUR)
(YEL)
EXTERNAL
STOP
3
4
5
T1
24VAC
SEC.
PRI.
AUX. CLOSE
LIMIT SWITCH
NC
C
1
7
10
OPEN
SAFETY EDGE
OPEN & CLOSE
LIMIT SWITCH
AUX. OPEN
C
NO
NC
LIMIT SWITCH
NC
C
TO MOTOR
POWER IN
L1
3 PHASE
INTERLOCK
OP
R1
OP
OP
CL
CL
OP
CL
OP
14
13
OVERLOAD
R1
OPEN & CLOSE
R2
R1
OPEN
CLOSE
2
14
13
CL
CL
LIMIT SWITCH
NC
CLOSE
C
R1
(BK)
(BK)
(BK)
(BRN)
(BR)
(YEL)
(OR)
(OR)
(OR)
(OR)
(RED)
(RED)
(OR)
(YEL)
(YEL)
(PUR)
(OR)
(PUR)
(PUR)
(PUR)
(PUR)
(PUR)
R3
(RED)
(BRN)
(YEL)
(OR)
(OR)
(SEE NOTE #1)
(PUR)
TIMER TO CLOSE
(PUR)
(OPTIONAL)
(WHEN PRESENT)
230V BRAKE
(GY)
(GY)
RADIO TO
A1
A2
A2
A1
(YEL)
NUT
WIRE
2
3
YEL
BRN
BRN
PUR
GY
1
6
9
BL/BK
BL/BK
O/L
4
7
8
5
(WHEN PRESENT)
230V BRAKE
2
3
YEL
BRN
BRN
PUR
GY
1
6
9
BL/BK
BL/BK
O/L
4
7
8
5
230 VOLT - 3 PHASE
MOTOR CONNECTION
460 VOLT - 3 PHASE
MOTOR CONNECTION
(SEE NOTE #2)
- SEE NOTE #2
*
*
*
(BK)
(BK)
OVERLOAD
(SEE NOTE #2)
NC
C
HAND CHAIN
INTL'K SWITCH
(WHEN PRESENT)
(BRN)
(WHEN PRESENT)
575V BRAKE
BRN
BRN
3
BL/BK
BL/BK
O/L
1
2
*
YEL
PUR
GY
575 VOLT - 3 PHASE
MOTOR CONNECTION
(RED)
(RED)
C2 WIRING
-
Constant Presssure to Close
RED WIRE ON TERMINAL #2 (Shipped from Factory)
B2 WIRING
-
Momentary Contact to Close
MOVE RED WIRE FROM TERMINAL #2 TO TERMINAL #3
*
CLOSE
CONTROL
WIRING
OPTIONS
-
Shipped from Factory
*
NOTE:
1. Voltage same as line voltage
2. Overload in motor for models up to 3/4 Hp, located in limit box for 1 Hp and above.
14
THREE PHASE SCHEMATIC DIAGRAM
1742-3