Grundfos SLC Series Installation And Operating Instructions Manual page 8

4.3.1 Wiring diagrams
SLC, float-switch-controlled option
From main power panel
XXX VAC, 3-phase, 60 Hz
Main disconnect switch provided by others
Ground wire
L1 L1
L2 L2
L3 L3
Fuses 2A
Control panel
transformer
XXXV - 120 V, 100 VA
Control panel
115 VAC
High-level alarm
float switch
Pump on float
switch
Pump off float
switch
Push-to-Silence alarm
Pump fault
Fig. 5 Wiring diagram, SLC with float switches
8
L1 T1
L2 T2
L3 T3
CB xxA K11
F1 F2
H1 H*
X1 X2
CB 10A
+
24 V
power supply
L1 N
+ -
LOGO
L+ M
4 3 i3
i2
4 2
4 1 i1
NIBP
i5
K02
21 22
i6
K03
21 22
Hand
Q1
Q3
Q4
Pump overtemperature sensor
OLR
96
6 5
Seal sensor
7
K01
12 11
8
Alarm contact
1
Pump
OLR
xxA
XXX VAC, 3-phase, XX hp
PLC text display
To LOGO
24 VDC power
-
supply
From
display
screen
PLC
Auto
K02 K03
OFF
11 14 11 14 Motor contactor
K11
A1 A2
X1 X2
Pump run light
G
Beacon alarm light
R
Alarm relay
K01
A1 A2
Audible alarm
A
-
+
Pump overload relay or
95
K02
overtemperature sensor
A1 A2
Pump seal-failure sensor
K03
A1 A2
11 14
9 10
Factory wire
Field wire