Key Benefits Enhanced System Reliability: The 120-second thermal expansion time delay relay prevents unnecessary downtime by filtering out momentary pressure fluctuations

it utilizes flame rectification to monitor combustion

a 13A15 vent protector must be utilized to prevent moisture and debris from entering the breather hole

while safely capping off the unused speed leads

Johnson Controls D-3153-7 Damper Actuator Freon Key Benefits Enhanced System Reliability:The Johnson Controls D 3153 7 is a heavy duty pneumatic damper actuator engineered for precise positioning of large dampers in commercial HVAC systems. This piston style actuator features a 15 inch effective diaphragm area and a 3 inch stroke, delivering high torque output for reliable airflow modulation. Built with a rugged die cast aluminum body, it operates on a 0 20 psig control air pressure range and utilizes an 8 13 psi spring range for fail