Electrical Installation; Electrical Connections To The Controller - Grundfos Variable Speed Instrucciones De Instalación Y Funcionamiento

6.3 Electrical installation

Warning
All electrical work should be
performed by a qualified electrician
in accordance with the latest
edition of the National Electrical
Code, local codes and regulations.
Warning
Power must not be applied to any
voltage supply wiring.
All field wiring must pass through a
Caution
suitable, listed conduit fitting, to
ensure proper strain relief.
All field installed wiring should
meet or exceed requirements for
Class 2 wiring per article 725 of the
Caution
National Electrical Code rated at
30 VAC 250 VA. Ensure that enough
wiring is in the terminal box to
reach the terminal board.
All field wiring shall have insulation
stripped exposing 5-7 mm of
Note
conductor before placement into
terminal box terminal board.
If rigid conduit is to be used, the hub must be
connected to the conduit system before it is
connected to the terminal box of the pump.
8

6.3.1 Electrical connections to the controller

Warning
The installer should make sure that
no current/voltage is present at any
of the wires.
Control signal wires must be run
Note
through and secured by the stain
relief on the terminal board.
No speed control signal is
Note
necessary if speed is to be
regulated using the manual % dial.
Current speed control signal connections
Connect the current signal wires to terminals
"Com(-)" and "Ret/I". See fig. 2.
Os / V
Ret / I
Com(-)
Fig. 2 Current connections to the
("Com(-)" and "Ret/I") control
Voltage speed control signal connections
Connect the voltage signal wires to terminals
"Com(-)" and "Os/V". See fig. 3.
Os / V
Ret / I
Com(-)
Fig. 3 Voltage connections to the
("Com(-)" and "Os/V") control
Test the speed control signal wiring
Make sure exposed wires and bare terminals
are not in contact with other wires or grounded
surfaces. Turn on the control signal and
measure the voltage/mA across the wires using
a voltmeter to confirm the pump signal is
present.