Honeywell FR124-3/4A draught regulator

Honeywell FR124-3/4A draft regulator is a fully mechanical and self-contained device designed for automatic adjustment of combustion intensity in solid fuel boilers. It operates without connection to the electrical grid, using thermal expansion of fluid in the sensor to control a chain that opens and closes the underblast damper. If your wood or coal boiler no longer maintains a stable temperature, cools down quickly, or conversely, goes into boiling, the most likely cause of the malfunction lies in this regulator. Technical specifications: Parameter Value; Part numbers FR124-3/4A, 534.662.001; Manufacturer Honeywell / Resideo; Type Mechanical combustion (draft) regulator; Application Solid fuel boilers (wood, coal, pellets); Temperature setting range 30 – 90 °C; Max. sensor temperature 115 °C; Max. temperature on head 70 °C; Connection (thread) G 3/4" (male thread); Immersion sleeve length 53 mm; Lever length 120 mm; Control chain length 1.2 meters (some versions 1.0 m); Chain load 100 – 600 g; Hysteresis (sensitivity) 1 °C (precise temperature maintenance); Mounting Horizontal or vertical; Materials Plastic (housing), brass (sleeve), galvanized steel (chain, lever); Weight 0.41 – 0.44 kg; Compliance with standards CE, EN 14597. Key advantages: Complete energy independence: The regulator operates without electricity, making it an ideal solution for solid fuel boilers in homes with unstable power supply or no electricity. Automatic stable temperature maintenance: The device independently doses air supply to the combustion chamber, responding to changes in coolant temperature. This ensures smooth water heating without sharp fluctuations and promotes economical fuel consumption. Prevents