Heat Exchanger Baxi JJJ005680990

Primary (main) heat exchanger for wall-mounted gas boilers Baxi with power 28-31 kW. Technical characteristics: Part numbers: JJJ005680990, 944.781.002, 5680990 (main code). Manufacturer: Baxi S.p.A. (Italy). Type: Primary (main) heat exchanger. Used to heat water in the heating system. Material: High-quality copper, providing efficient heat transfer and corrosion resistance. Resistant to high temperatures and pressure fluctuations. Power: For boilers with power 28–31 kW (2 outlets). Dimensions: Working part length 295 mm, width 180 mm. Compatibility and installation: This heat exchanger is suitable for turbo (closed combustion chamber) boiler models: Baxi Eco 3: 280 Fi, Baxi Luna 3 Comfort: 1.310 Fi, 310 Fi, Max 310 Fi, Air 310 Fi, Baxi Star Digit: 1.310 Fi, 310 Fi, 280 Fi, Westen Star Digit: 1.310 Fi, 310 Fi, 280 Fi. Important: Check for the "Turbo" marking in your model name. For atmospheric boilers (open chamber), this part is likely not suitable. ⚙️ Signs of malfunction: Heat exchanger replacement is necessary with the following symptoms: Reduced heating efficiency: radiators heat much worse with normal burner operation. Overheating and noises: boiler is very noisy (hissing, whistling) or periodically overheats. This is often a sign of scale. Pressure drop: pressure in the heating system constantly drops, although there are no visible leaks in the pipes. Visual damage: traces of water leakage, corrosion or white deposit on the part body inside the boiler. Replacement recommendations: Installation: Replacing the heat exchanger is a complex procedure requiring draining the coolant and disassembling the boiler hydraulic group. I strongly recommend entrusting this to a qualified specialist. Kit: Check if fasteners and new