Grundfos CU331SP Variable Frequency Drive

Overview

Overview

The CU331SP is a constant pressure, variable frequency drive based on a proven product platform. CU331SP is a strong supplement to the Grundfos SmartFlo constant pressure program. This new product is designed to easily adapt to any combination of 2HP, 3HP or 5HP Grundfos SP pump systems using a 3-phase motor. This wall mounted system maintains a constant pressure within the maximum pump performance in spite of varying water consumption. The CU331SP is programmed with parameter settings optimized for submersible pump applications. An easy to follow Start-Up Guide walks the installer through a few screens and completes the set-up.

Applications

For 4" or larger wells: 2, 3 or 5HP pumps

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


Features & Benefits

  • Easy setup – simply run the Start-up Wizard and choose pressure setpoint,
  • The system determines the direction of rotation and sets the dry-run function  according to the pump,
  • System design approach – the CU331SP works with any combination of matched pump and motor,
  • CU331SP works with 2, 3 or 5Hp submersible pumps to fulfill your constant pressure requirements,
  • Matched pump & motor – 2HP pump on 2HP motor, 3HP pump on 3HP motor, 5HP pump on 5HP motor,
  • Built-in protection features – Soft start, dry run, overload, over/under voltage, sensor alarm, alarm relay and run relay,
  • Wide voltage range – input: single phase 208 - 240VAC output: 3-phase 208-240VAC,
  • Indoor or outdoor enclosure options: IP55/Type 12 or IP66/Type 4X.




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Literature

Literature

 

CU331SP - Complete Range of Constant Pressure Systems

Sales Brochure

CU331SP - Complete Range of Constant Pressure Systems


CU331SP, SQ, SQE, SQE-NE

Databooklet

CU331SP, SQ, SQE, SQE-NE


CU331SP - 2, 3 & 5 HP

Installation and Operating Instructions

CU331SP - 2, 3 & 5 HP


CU331SP - Grundfos Instructions

Quick Guide

CU331SP - Grundfos Instructions


Contact
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