this unit is the standard choice for restoring proper cycling to Lochinvar and A

The thermistor violet lead identification simplifies circuit tracing during 24VAC diagnostic procedures

allowing for precise calibration of valve modulation to meet specific sequence requirements

Whether you are cross-referencing a Therm-O-Disc 74T11-310711 or consolidating inventory to cover multiple temperature setpoints

Siemens Building Technology GMA221.1U Actuator 323080-701 this unit is the standardThe Siemens GMA221. 1U is a high performance OpenAir damper actuator engineered for reliable 2 position (on off) control in critical HVAC environments. Operating on a 120 VAC power supply, this direct coupled unit delivers a robust 62 lb in torque (7 Nm), making it the primary choice for managing return air, mixed air, and exhaust dampers in both constant and variable air volume (VAV) systems. The integrated spring return fail safe mechanism ensures