H20 Drive RD300 2-3 HP Constant Pressure Control

The H2O Drive RD300 is a constant pressure control panel for three-phase submersible well pump applications. It uses a variable frequency drive and a 0-150 PSI pressure transducer to adjust pump speed as system demand changes, operate automatically as demand changes, and maintain the selected pressure when multiple outlets are in use. In high-performance water systems, reliability, quality, and technical support matter just as much as pressure control. A color LCD display supports setup and monitoring with pressure, pump speed, amps, status, alarms, and alarm history, so homeowners, farm operators, contractors, and commercial users can see the key information needed to run the system correctly.

A dry run condition means the pump is running dry with low or no water flow, which can cause permanent damage to the pump, impeller, bearings, and the cooling of internal components.

Dry run protection is an important safeguard that uses current-sensing or power-based monitoring of the active power value to detect low flow and shut the pump to stop damage and overheating, providing reliable protection. There are different methods for detecting dry run, and the recommended setup depends on having the right information in mind during installation and adjustment. A motor replacement costs significantly more than dry-run protection, which is one of the clear advantages of built-in protection.

The H2O Drive RD300 is a state-of-the-art constant pressure controller designed to enhance the performance of your submersible well pumps. Utilizing advanced Variable Frequency Drive (VFD) technology, this controller ensures stable water pressure in residential, agricultural, or commercial water systems by automatically adjusting the pump speed according to water demand. This function helps water pumps in wells maintain steady pressure and prevent drops when several fixtures are used at once. In this overview, you’ll see the main benefits of the RD300, how its dry-run protection and LCD monitoring work, and what to keep in mind for installation and system setup. A traditional pump system may also rely on a pressure switch and larger tank, while a VFD controller can reduce dependence on those components. Private well systems can be subject to changing source conditions, which leads to dry-run risk and makes protection important for long-term reliability.

Display & Monitoring Functions for Dry Running

The integrated color LCD display provides access to:

• System pressure (PSI)

• Pump speed (Hz)

• Motor amperage

• Pump running status

• Alarm notifications

• Alarm history

• System alerts and diagnostics

System Specifications:

• Model #: RD300

• Horsepower compatibility: 2 to 3 HP for high performance applications, with reliability prioritized as a key spec

• Shipping Weight: 18 lbs

• Operates on 200–240V single-phase input, converts to 208/230V three-phase output.

• Enclosure rating: nema 3R, for indoor and outdoor installations where manual reset is required. this may also be needed when replacing components or controllers after a shutoff event