Grundfos CU 321 5hp 1x230v

Constant Pressure System
Grundfos is excited to announce the introduction of a new
addition to its family of Constant Pressure submersible pumping
systems, the single phase 5hp CU321.

The CU321 is designed as part of a complete system comprising
a Grundfos pump, Grundfos motor, and Grundfos control unit all
calibrated to work together. All components are designed by one
manufacturer to work together, eliminating uncertainties regarding
motor or pump end combinations.

The highly efficient, reliable, and proven drive is designed to extend the range of our SmartFlo family of Constant Pressure Systems from ½ hp through 5hp.

Main applications:
• Domestic and light commercial water supply
• Irrigation
• Livestock watering
• Water transfer

SmartFlo CU321 Constant Water Pressure System consists of:
• Compact, efficient, and reliable CU321 variable frequency drive
• Rugged stainless steel pump end and proven, reliable 3-phase 230V motor
• Pressure sensor
• Minimum 4 gallon diaphragm tank (sold separately)

CU321 features the following:
• A complete solution from one manufacturer
• Easy setup – simply select pump model and choose pressure setpoint
• System design approach – CU321 is calibrated to the Grundfos motor and pump, eliminating doubts about proper pump or motor selection
• Four pump choices – offered in most popular sizes, both 3 and 5hp: 16, 25, 40 and 75gpm
• Matched pump and motor – 3hp pump on 3hp motor and 5hp pump on 5hp motor.
• Respects original operating designs – operates pump and motor within its designed RPM
and hp ratings
• Built-in protection features – Soft start, dry run, overload, over/under voltage, sensor alarm
• Wide voltage range – 3hp and 5hp input: single phase 208 – 240VAC