Grundfos control boxes (CB) are designed for single-phase, 3-wire submersible motors, serving as essential starting devices for 4" motors. Key models include the 98315253 (1 HP, 230V), 98315254 (1.5 HP, 230V), and 98821580 (1/2 HP, 115V). They feature NEMA 3R epoxy-coated steel enclosures, external access to overload resets, and terminal blocks for easy wiring.
Installation and Maintenance:
Ensure the control box matches the motor's horsepower and voltage exactly; using a higher HP rating can damage the pump.
The boxes feature multiple knockouts and clearly marked terminal boards for user-friendly wiring.
Overload reset buttons are externally accessible, allowing for easy troubleshooting without opening the unit.
These boxes ensure reliable starting and protection for submersible well pumps, providing necessary capacitance for motor startup.
