Overview

The Grundfos CU 202 is a sophisticated control and communication unit specifically designed for the SQFlex solar pumping system. It provides a centralized interface for monitoring system status and managing pump operation through simple, intuitive indicators. By integrating sensor inputs and system diagnostics, the CU 202 ensures optimal water delivery and provides critical protection against environmental and electrical faults, making it an essential component for high-reliability solar water solutions.

Key Features

  • Comprehensive System Monitoring: Provides clear LED indicators for operating status, full tank detection, and power input.
  • Advanced Fault Diagnostics: Monitors for critical system issues including dry-running, overvoltage, overtemperature, and overload conditions.
  • Flexible Input Support: Features dedicated terminals for level switches (liquid level sensors) and pressure switches to automate pumping cycles.
  • Communication Integration: Facilitates data exchange between the SQFlex pump and the user interface for streamlined operation.
  • Rugged Environmental Protection: Features an IP55 rated enclosure for durable performance in harsh outdoor or well-head environments.
  • User-Friendly Interface: Includes a simple On/Off button and clear service indicators to simplify field maintenance.

Applications

  • Automated livestock watering systems using float or level switches.
  • Residential off-grid water supply with pressure tank integration.
  • Remote agricultural irrigation and crop management.
  • Community water distribution in regions with unstable grid power.

Industries & Use Cases

  • Agriculture: Maintaining consistent water levels in remote troughs without manual intervention.
  • Off-Grid Living: Centralized control for home solar well systems.
  • Industrial: Remote monitoring for site dewatering or environmental sampling.

Technical Specifications

Voltage Range 30-300 VDC, 1x90-240 VAC
Power Consumption 5 W
Enclosure Class IP55
Ambient Temperature -22°F to 122°F (-30°C to 50°C)
Max Level Switch Load 12 VDC, 10 mA
Max Distance (Switch) 1,640 ft (500 m)
Weight 4.4 lbs (2 kg)
Certification CE, UL, C-Tick

B2B Add-On

For system integrators, the CU 202 serves as a vital diagnostic tool that significantly reduces site visit times. The unit's ability to distinguish between dry-running, power supply issues, and pump faults allows for rapid troubleshooting in the field. With support for cable runs up to 500 meters to level switches, it offers the flexibility needed for complex site topographies where the well head and storage tank are significantly separated.