Terminal Box Positions; Electrical Installation; Motor Protection; Electrical Connection - Grundfos CM Instrucciones De Instalación Y Funcionamiento

7.4 Terminal box positions

The pump is available with various terminal box positions on
special request. See fig. 9.
Fig. 9 Terminal box positions

8. Electrical installation

Warning
The electrical connection must be carried out in
accordance with local regulations.
Before starting work on the pump, make sure that
the power supply has been switched off and that it
cannot be accidentally switched on.
Check that the mains voltage and frequency correspond to the
values on the motor nameplate.

8.1 Motor protection

Single-phase motors, 1 x 115/230 V, 60 Hz, do not incorporate
motor protection and must be connected to a motor-protective
circuit breaker which can be manually reset. Set the motor-
protective circuit breaker according to the rated current of the
motor (I ). See nameplate.
1/1
Three-phase motors up to 3 hp must be connected to a motor-
protective circuit breaker which can be manually reset. Set the
motor-protective circuit breaker according to the rated current of
the motor (I ). See nameplate.
1/1
Motors with horsepower ratings of 3 hp and up have built-in
thermistors (PTC). The thermistors are designed according to
DIN 44082. The motor protection is of the TP 211 type, which
reacts to both slow- and quick-rising temperatures.
8

8.2 Electrical connection

Carry out the electrical connection as shown in the diagram
inside the terminal box cover.
4 5 6
1 2 3
L1 L2 L3
Interchange any two line wires
to reverse rotation
Thermostat leads
(when provided)
Low voltage
L1
2
N 4
Capacitor
6
Low voltage
60 Hz, 208 - 230 V
6
9
3 2
L3 L2 L1
Interchange any two line wires
to reverse rotation
Fig. 10 Wiring diagram
J
J
High voltage
L1
1 2 1
3 L2 4 3
Capacitor
5 6 5
High voltage
60 Hz, 460 V
50 Hz, 400 V
5 4
6 4
5
8 7
9 8 7
3 2 1
1
L3 L2 L1
J
Thermostat leads
(when provided) J