It is designed for unit sizes 30 through 400

mechanical solution for head pressure control in split systems

facilitating "close on rise" operation to ensure optimal system cycling and safety

Designed for high-back pressure (HBP) environments

Compact Footprint: Standard mount design ensures a direct fit into existing plenum configurations for fast

Functional Devices RIB2401SB-NC Relay 323080-701 It is designed for unitThe Functional Devices RIB2401SB NC is an enclosed 20 Amp SPST NC power relay engineered for heavy duty commercial HVAC and automation control. This single pole single throw normally closed relay features a dual coil input compatible with both 24VAC DC and 120VAC, providing versatile integration for building management systems (BMS). The "SB" configuration indicates a split brain relay design, separating the sense and power circuits to ensure reliable