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Conveying System Mechanical Components Chapter 3: Installation 74 of 138
Figure 39: Typical SPDB 25, 30 Series Junction Box Wiring Diagram
(115VAC)/(0VDC)
TO CONTROLLER INPUT FOR
PUMP HIGH-VACUUM
64
3
T
2
T
1
T
2
RESET
TRIPPED
TEST
98
97
96
95
A2
14
6
T3
4
T2
A2
A09
A1
13
L3
5
L2
3
L1
1
T1
2
L1
L2 L3
M
OL
T1 T2 T3
VS
(NEUTRAL)/(+24VDC)
TO UPPER VALVE
PROCESS AIR
VS
(115V AC)
TO CONTROLLER INPUT FOR
PUMP HIGH VACUUM
J1
0L
9596
M
A2 A1
SOL A
SOL B
FROM CONTROLLER OUTPUT
FOR MOTOR STARTER
FOR VACUUM PUMP SOLENOID
FROM CONTROLLER OUTPUT
FOR PUMP BLOWBACK SOLENOID
FROM CONTROLLER OUTPUT
(NEUTRAL)
VACUUM PUMP
MOTOR STARTER
VACUUM
SOLENOID ON PUMP
BLOWBACK SOLENOID
ON PUMP
JUNCTION BOX ON VACUUM PUMP
CONTROL WIRING
115V AC CONTROL VOLTAGE
CONNECTION
J1
FROM CONTROLLER OUTPUT
FOR PUMP MOTOR STARTER
INTERNAL
FIELD WIRING
LEGEND
WIRE LUG
WIRING
COMMON
JUNCTION
BOX
TO
BLOWBACK
VACUUM
LOCATED ON
KAY VALVE
PUMP
TO MOTOR
N.O.
(0V DC)
CONTROL WIRING
JUNCTION BOX ON VACUUM PUMP
24V DC CONTROL VOLTAGE
0L
96 95
J1
SOL B
SOL A
1M
A2 A1
VS
N.O.
(+24V DC)
ON PUMP
VACUUM PUMP
SOLENOID ON PUMP
BLOWBACK SOLENOID
MOTOR STARTER
VACUUM
BE PROVIDED BY CUSTOMER
FUSED DISCONNECT SWITCH TO
3 PHASE / 4 WIRE SERVICE AND
L1
L3
L2
FU
FU
FU
DISC
5 H.P. PUMP
OL
L2
L3
L1
M
T2
T3
T1
MTR
(115V AC AND 24V DC)
SUB PANEL LAYOUT AND CONNECTION DIAGRAM
FROM CONTROLLER OUTPUT
FOR VACUUM SOLENOID
ON MOTOR STARTER (M)
TO TERMINAL A1 (NEUTRAL)/(+24VDC)
FOR BLOWBACK SOLENOID
GRD
(MTR)
FROM CONTROLLER OUTPUT
FOR VACUUM PUMP SOLENOID
FOR MOTOR STARTER
FROM CONTROLLER OUTPUT
TO CONTROLLER INPUT FOR
PUMP HIGH VACUUM
FROM CONTROLLER OUTPUT
FROM CONTROLLER OUTPUT
FOR PUMP BLOWBACK SOLENOID
Note: This information is shown for reference only. Refer to the electrical
Schematics that were supplied with your equipment and controls for specific
wiring information.