Siemens Building Technology 331-2856 Actuator R-22 Does this unit require a

Does this unit require a separate vent limiter

Pilot Duty Efficiency: Optimized for low-voltage control

Designed for heavy-duty service in potable water systems

maintaining the integrity of the furnace safety chain during high-static or restricted airflow events

including the solenoid plunger spring

Siemens Building Technology 331-2856 Actuator R-22 Does this unit require aThe Siemens 331 2856 is a heavy duty Powers Controls No. 6 pneumatic actuator designed for reliable linear control of large dampers, centrifugal refrigeration inlet vanes, and multi section ventilation systems. This pneumatic damper actuator features a rugged, all metal body construction to withstand demanding mechanical environments. It operates on a nominal 8 13 psi spring range, providing the high torque performance required for outdoor air,