facilitating easy field retrofits without wiring modifications

maintaining a pressure-tight seal is mandatory to ensure proper combustion air-flow and to prevent the leakage of flue gases into the cabinet

3 frame design for reduced friction and improved heat dissipation

this unit ensures reliable contact closure and arc suppression

This shell requires two 48 cubic inch cores

Siemens DDC 540-100N Control R-407A facilitating easy field retrofits withoutThe Siemens 540 100N is a high performance Terminal Box Controller designed for precise pressure independent Variable Air Volume (VAV) system management. Operating on a Direct Digital Control (DDC) architecture, this unit provides HVAC professionals with advanced control over zone level routines, including VAV cooling, heating, and fan powered applications. It features six solid state digital outputs rated for 24 VAC at 0. 5 A per channel, ensuring