Installation
Main Power Connections at the VFD
All electrical wiring must be completed by a
qualified electrician and comply with all local codes
and regulations.
Connect the power supply wires to the VFD, as
follows:
1. Connect the wiring between the motor and VFD,
as detailed above.
2. Connect the green ground wire of the power
supply to the ground screw. The ground wire
from the motor is also connected to this screw.
3. Connect the power supply wires to the power
terminals in the VFD box, following all local codes
and regulations.
4. Close the VFD electrical box.
Leak Sensor Wiring
Follow these instructions to wire the Leak Sensor to
a VFD.
NOTE: The leak sensor is designed to operate as
a normally-closed circuit.
1. Turn off power to the VFD.
2. Open the access cover on the VFD.
3. For a Graco VFD, perform the following:
a. Wire one lead to terminal 4 on the rail.
b. Wire a second lead to terminal 13A on the
rail.
c. Close the access cover.
d. Turn on power to the VFD.
e. Go to screen P121.
f. Change the value to 21 and press the Mode
button.
4. For a non-Graco VFD, perform the following:
a. Attach the two leads to the detection circuit
in the VFD.
NOTE: Refer to the VFD manual for proper
connection points.
b. Close the access cover.
c. Turn on power to the VFD.
d. Configure the VFD to monitor the leak sensor
circuit.
5. Refer to the VFD manual for information on how
to configure the VFD to generate a fault or stop
the pump when a leak is detected.
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3A5132F
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