functioning as a normally open contact that closes once the draft inducer motor generates sufficient negative pressure

Dual-Voltage Versatility: Native support for 12V and 24V systems reduces inventory complexity for multi-phase projects

this unit is built for durability in mechanical rooms and air handling units

Durable Construction: Engineered with robust materials to resist diaphragm fatigue and terminal corrosion over long service cycles

including Luxaire and Coleman models

Functional Devices RIB RIB2421SB Relay functioning as a normally openThe Functional Devices RIB2421SB is a heavy duty, pre packaged 20 Amp enclosed relay engineered for high demand HVACR and industrial energy management systems. This SPDT relay features a multi voltage coil that accepts 24VAC DC, 120VAC, and 208 277VAC, providing a versatile solution for varying control circuit requirements without the need for multiple stocked parts. Designed for direct BAS and lighting control, the RIB2421SB relay includes an