allowing contractors to maintain tight system tolerances

Optimized Combustion: Facilitates a uniform air-gas mixture to ensure consistent gas flame modulation

Standard 115V or higher amperage 20A units will require different specifications

the sweat connection should be soldered with the actuator removed to protect the internal seals

Siemens DDC 540-110N Controller 328140-751 allowing contractors to maintain tightThe Siemens DDC 540 110N Controller is a high performance Terminal Equipment Controller (TEC) engineered for precise management of HVAC zone control applications. As the direct 540 110 cross reference, this digital module is purpose built for fan coil unit control, heat pumps, and unit ventilators within a Siemens APOGEE FLN network. Operating on a 24 VAC power supply, it utilizes advanced PID algorithms to stabilize temperature loops and minimize