Grundfos SLC Series Installation And Operating Instructions Manual page 10

DLC, float-switch-controlled option
From main power panel
XXX VAC, 3-phase, 60 Hz
Main disconnect switch provided by others
Ground wire
L1
L2
L3
Fuses 2A
Controls - transformer
XXXV - 120 V, 100 VA
Control panel
115 VAC
High-level alarm
float switch
Standby pump on
float switch
Duty pump on float
switch
Pumps-off float switch
Push-to-Silence alarm
Pump 1 failure
Pump 2 failure
Fig. 7 Wiring diagram, DLC with float switches
10
L1 T1
L1
L2 T2
L2
L3 T3
L3
CB xxA K11
OLR1
xxA
L1 T1
L2 T2
L3 T3
CB xxA
K12
OLR2
XXA
F1 F2
H1 H*
X1 X2
CB 10A
+ -
24 V
power supply
L1 N
+ -
From
display
LOGO
screen
L+ M
5 4 i4
i3
5 3
i2
5 2
5 1 i1
NIBP
i5
K02
21 22
i6
K03
21 22
K04
21 22
i7
K03
21 22
Hand Auto
Off
Q1
Hand
Off
Q2
Q3
Q4
Pump 1 over-
temperature sensor OLR1
96 95
7 6
Seal sensor 1
8
Pump 2 over-
temperature sensor OLR2
96 95
10 9
Seal sensor 2
11
K01
12 11 11
12 13
Alarm contact
Factory wire
Field wire
1
Pumps
XXX VAC, 3-phase
XX hp
2
PLC text display
To LOGO
24 VDC
power supply
PLC
K02 K03
Motor contactor
11 14 11 14
K11
A1 A2
Pump run light
X1 X2
G
Auto
K04 K05
11 14 11 14 Motor contactor
K12
A1 A2
X2 Pump run light
X1
G
Beacon Alarm Light
R
Alarm relay
K01
A1 A2
Audible Alarm
A
-
+
Pump 1 overload relay or
K02
A1 A2 overtemperature sensor
Pump 1 seal-failure sensor
K03
A1 A2
Pump 2 overload relay or
K04
overtemperature sensor
A1 A2
Pump 2 seal-failure sensor
K05
A1 A2
14
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