Connection Of E-Pump To Liqtec; Bus Connection Cable; New Installations; Replacing An Existing Pump - Grundfos CRE Instrucciones De Instalación Y Funcionamiento

3.5.2 Connection of E-pump to LiqTec®
Connection terminals on E-pump:
2 (Start/Stop) and 3 (GND) 3
Fig. 9

Connection of E-pump to LiqTec

3.6 Bus connection cable

3.6.1 New installations

For the bus connection, use a screened 3-core cable with a
conductor cross-section of 28-16 AWG.
• If the pump is connected to a unit with a cable clamp which is
identical to the one on the pump, connect the screen to this
cable clamp.
• If the unit has no cable clamp as shown in fig. 10, leave the
screen unconnected at this end.
A
1
2
Y
3
B
Fig. 10 Connection with screened 3-core cable
10
Dry-running sensor
Set to automatic resetting
2
Pump
A
1
2
Y
3
B
Jumper cable
1 x 200-240 VAC
or
1 X 80-130 VAC

3.6.2 Replacing an existing pump

• If a screened 2-core cable is used in the existing installation,
connect it as shown in fig. 11.
A
1
Y
2
B
Fig. 11 Connection with screened 2-core cable
• If a screened 3-core cable is used in the existing installation,
follow the instructions in section
Pump
A
1
Y
2
B
3.6.1 New installations.