or battery with power-stealing assist for reliable uptime

While it will function

this Parker-Watts series miniature regulator delivers the technical accuracy required by professional contractors for stable system operation in temperature environments ranging from 40°F to 120°F

or the system failing to heat because the circuit remains open despite the unit being cool

it provides a direct electrical and mounting footprint for several legacy modules

Siemens Building Technology GJD226.1U Actuator 328140-751 or battery with power-stealing assistThe Siemens Building Technology GJD226. 1U Actuator is a high performance 120V fire and smoke damper actuator engineered for 2 position, spring return operation in life safety systems. Delivering a minimum torque of 20 lb in, this OpenAir damper actuator is specifically designed for UL listed smoke control and combination fire smoke dampers. Its robust construction ensures reliable performance during emergency fail safe scenarios, with a fast acting