The Grundfos CU301 Controller is purpose-built for use with SQE submersible pumps to maintain consistent water pressure in residential and light commercial systems. Designed to regulate pump performance based on real-time water demand, the CU301 ensures optimal comfort by eliminating pressure fluctuations and reducing pump cycling.

This smart controller enables fully automatic, variable-speed operation via communication with a connected SQE pump. The integrated pressure sensor constantly monitors pressure and adjusts motor speed accordingly. It’s the ideal upgrade for homeowners or installers seeking a plug-and-play constant pressure solution that enhances system efficiency and user convenience.

Compatible with the Grundfos GO remote management tools via Bluetooth or Apple Lightning dongles, users can easily access live performance data or modify pressure settings from their mobile device. A simple push-button interface on the controller allows manual start/stop/reset.

FEATURES

• Constant pressure control with variable-speed regulation
• Two-way communication with SQE pump via powerline (no extra cables needed)
• LED alarm/status indicators for real-time feedback
• Start, stop, and reset via single push-button
• Integrated alarm notifications: dry-running, overload, undervoltage, sensor failure, and more
• External input for pressure sensor and operating relay
• Automatically reverts to pressure switch mode if communication fails

REMOTE MONITORING 

• Compatible with Grundfos GO MI 204 (Apple Lightning) and MI 301 (Bluetooth) dongles
• Monitor and adjust pressure, view power consumption, run hours, motor speed, and alarm history

APPLICATIONS

• Residential constant pressure systems
• Rural water supply from tanks or bores
• Booster systems for small irrigation