If your return line pressure is too high relative to the supply

Its NEMA 2

leading to increased HVAC system harmonics

Manual Reset Mechanism: Ensures thorough system inspection after a trip occurs

This specific assembly is configured for natural gas

Browning 4L450 Belt 321142-301 If your return line pressureThe Browning 4L450 Belt is a heavy duty fractional horsepower V belt engineered specifically for light duty HVAC systems, blowers, and air handling units. Featuring a 45 inch outside diameter and a standard 4L section profile (1 2" top width x 9 32" thickness), this wrapped construction belt provides superior resistance to ambient heat and oil. Designed for high frequency drive cycles, the FHP V belt utilizes synthetic tensile cords to maintain