Johnson Controls F59H-1 Switch

The Johnson Controls F59H-1 Switch is a heavy-duty, two-pole liquid level switch designed for automated sump operation and open tank management. Engineered as the direct replacement for the legacy F59H-6 model, this unit features a DPST (Double-Pole, Single-Throw) contact block rated for 1 hp at 120/240 Vac and 1/4 hp at 32 Vdc. The switch utilizes a weight-operated mechanism, including a 3-foot non-corrosive cable and two phenolic weights, to trigger motor activation on liquid rise. Built with a rugged NEMA 1 enclosure and a fixed mounting bracket, it ensures stable installation for conduit wiring applications. The internal contact block is factory-sealed to maintain high contact force until the precise break point, preventing arcing and ensuring reliable on/off control in demanding HVACR and plumbing environments. The F59H-1 can also be field-adjusted for tank filling by rotating the unit 180 degrees to open contacts on liquid rise.

• Direct Compatibility: Seamlessly replaces the F59H-6 without requiring additional mounting modifications.
• Reliable Switching: Proven DPST contact block supports a wide voltage range (120V to 240V AC) for versatile motor control.
• Durable Construction: Features a NEMA 1 stainless steel case and non-corrosive components to withstand high-humidity sump environments.
• Field Versatility: Fixed mounting bracket can be reversed in the field, and the unit is compatible with both weight and float-style operation.

Is the F59H-1 suitable for high-temperature liquids?
The weights are rated for temperatures up to 150°F (66°C), while the switch head itself should not exceed 140°F (60°C).

Does this unit support conduit wiring?
Yes, the F59H-1 is specifically designed with 7/8-inch conduit openings for secure electrical connections in permanent installations.

Can I use this for tank filling instead of sump drainage?
Yes. While factory-set for sump operation, the switch can be rotated 180 degrees and adjusted to open contacts on liquid rise for tank-filling applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.