The Johnson Controls DMPR-RS312 is a high-performance 212-degree fusible link engineered for critical fail-safe activation in fire and smoke damper assemblies

By ensuring the high limit control activates at the exact factory-calibrated setpoint

Technicians often diagnose a faulty 3L09-2 by checking for continuity with a multimeter

s bill of materials to ensure the temperature settings and insertion depth match your specific furnace configuration

Zero Pressure Actuation: The direct-acting design ensures the valve opens and closes reliably regardless of system pressure

Johnson Controls T-4002-202 Thermostat Els PW 17895 The Johnson Controls DMPR-RS312 isThe Johnson Controls T 4002 202 is a high performance pneumatic thermostat designed for precise space temperature control in commercial and industrial HVAC systems. This reverse acting unit features a horizontal mount configuration and a standard 55 85F dial range, making it a reliable choice for modulating pneumatic valves and damper actuators. Engineered with a bimetal sensing element, the T 4002 202 provides a proportional output air signal to