Installation Steps

Preparation

• Location: Install the VFD in a clean, dry environment with adequate ventilation. It should be mounted in a location where ambient temperature, humidity, and dust levels meet the specifications listed in the product manual, usually 32°F to 104°F.
• Mounting: Mount the VFD vertically on a flat surface, ensuring the ventilation slots are unobstructed. Use the provided mounting tabs on the VFD to secure it to the wall or panel.

1. Power Wiring

• Input Power (AC):
• Connect the incoming power lines (L1, L2, and L3 for 3-phase models) to the designated terminals for AC input. These are typically marked as L1, L2, and L3 on the VFD terminal block.
• Ground should be connected to their respective terminals.
• Output Power (To Motor):
• Connect the output terminals (U, V, W) to the motor. These terminals are for motor leads, typically marked as U, V, and W.

2. Control Wiring

• Remote Control (Optional): If using a remote on/off device (call for water), wire the control terminals Aux1, Com. These may include connections for start/stop or a safety overpressure switch.
• Analog Inputs: If you're using a 4-20mA transducer for controlling speed, wire it to I1+ (white) and I1- (black).

3. Grounding

• Grounding is critical for safety and proper operation (5 ohms resistance or less).
• Connect the ground terminal to an appropriate grounding point. Ensure the ground wire is of sufficient gauge to handle potential fault currents.

4. Power On and Testing

• Power Up: After completing all wiring, double-check all connections and ensure the unit is properly grounded.
• Test Operation:
• Power up the VFD and the motor.
• Verify that the motor starts smoothly and is running in the correct direction.
• Check Read Measured Values > I1 4-20 mA signal to verify a proper connection.

Important Notes:

• Always follow electrical codes and standards during installation.
• Never use wire nuts on pumps leads. Only use connections capable of 600 - 1000 V.
• Never run transducer cable in the same conduit or parallel to motor leads.
• Never splice transducer cables as this leads to resistance and poor performance.
• Ensure proper ventilation for the VFD to prevent overheating.
• Don’t assume anything. Always test earth to ground resistance.

For more detailed information, refer to the Phase Technologies manual specific to your model. https://www.phasetechnologies.com/support/downloads