Electrical Connections; Motors - Grundfos LFE Instrucciones De Instalación Y Funcionamiento

3. Checking angular alignment
Insert a pair of inside callipers or a taper gauge at four points
at 90 ° intervals around the coupling. See fig. 5. Angular
alignment is correct when the measurements show that all
points of the coupling faces are within ± 0.005 in. (0.127 mm)
of each other.
– If misalignment is detected, loosen the motor and shift or
shim as necessary to re-align. Then re-tighten the bolts.
Always align the motor to the pump as pipe strain will occur
if the pump is shifted. Never reposition the pump on the
base frame.
Checking angular alignment
Fig. 5
• Check shaft seal alignment once again after final pipe
connections to the pump have been made, motor wiring has
been checked, correct direction of rotation has been
established, and pipes have been filled with liquid.
• Leave the coupling guards off until the pump priming
procedure has been completed.
• Install the coupling guards after installation has been
completed to protect personnel from rotating machinery.

4.5 Electrical connections

DANGER
Electric shock
Death or serious personal injury
- The electrical installation must be carried out by a
qualified electrician in accordance with local
regulations and the manuals provided with the
electrical accessories.
DANGER
Electric shock
Death or serious personal injury
- Before starting any work on the product, be sure
the power supply has been switched off and that it
cannot be accidentally switched on.
All manuals and user guides at all-guides.com

4.6 Motors

See also section
The motor control circuit must include the following components
in order to comply with the National Electrical Code:
Motor disconnecting device
•
•
•
Motor short circuit and ground fault circuit interrupter
•
•
Motor controller with current protection (magnetic starter)
•
4.6.1 Wiring
•
•
•
•
11. PACO MLE motors.
Install a motor disconnecting device that is capable of
disconnecting both the controller (motor starter) and the motor
from their source of power.
Locate the disconnecting device in such a way that the
controller (motor starter) can be seen from the disconnecting
device. In all cases, the distance from the disconnecting
device to the controller must be less than 50 ft (15.24 m).
In most installations the disconnecting device will be a circuit
breaker or fusible disconnect switch.
A short circuit and ground fault circuit interrupter is usually a
circuit breaker or fusible disconnect switch.
Select the circuit breaker or fuse in accordance with applicable
local and state electrical codes in addition to the National
Electrical Code.
Install these components in accordance with applicable local
and state electrical codes in addition to the National Electrical
Code.
DANGER
Explosive environment
Death or serious personal injury
- Observe the rules and regulations generally or
specifically imposed by the relevant responsible
authorities or trade organizations in relation to
running powered equipment in an explosive
environment.
Mount the control panel or the motor starter(s) close to the
pump to provide convenient control and easy installation.
Wire panel or starter(s) to motor(s) and pilot device(s).
Wires to the motor(s) must be sized for at least 125 % of the
motor nameplate full load amps. We recommend AWG #16
Type THW stranded wire for wiring of pilot devices, such as
float switches.
Check that the voltage, phase and frequency of the incoming
power source correspond to the voltage, phase and frequency
of the motor(s).
Make sure that the starters are suitable for operating the pump
motors on the voltage, phase and frequency available.
9