Grundfos CU 321 Installation And Operating Instructions página 14

Motor rating
Mains supply Power
[V] [hp]
3
3 x 208
5
3
3 x 240
5
2.3.4 Direction of motor rotation
To change the direction of motor rotation, switch any
two phases at the drive output.
WARNING!
Remember to turn off mains and wait at
least 4 minutes for current to dissipate
before switching phases.
2.3.5 Connection of the pressure sensor
The CU 321 is factory-set for this pressure sensor:
Data
Product
Signal Range
Pressure
4-20 mA 0-120 psi
sensor
Connect the pressure sensor to the control terminals
as follows:
CU 321 terminals
12
60
SENSOR
Fig. 17 Sensor connection label in CU 321
Note: Expose enough cable screen to make electri-
cal contact to the cable clamp.
Fig. 18 Control terminals in CU 321
14
Maximum motor cable length [feet]
14 12 10
180 290 470
– 170 280
210 340 540
– 200 320
Product
number
96437852
Sensor wire color
Brown
Black
Copper wire size [AWG]
8 6
740 1160
440 690
860 1340
510 800
4 2
1810 –
1080 1300
2080 –
1240 1300