AFEM (Automatic Fuel Efficiency Module)

Visual inspection of combustion chamber for corrosion, erosion, scale deposits, or soot; verify Ultramizing® burner nozzles for proper spray pattern and flame stability; check fuel oil atomization quality; minimum annual inspection, more frequent if operating in harsh marine conditions

Calibrate oxygen analyzer per manufacturer schedule (typical: quarterly to semi-annually); verify actual oxygen levels match analyzer display; check for sensor contamination or fouling; ensure blow-back system (if equipped) functions properly; test analyzer accuracy across full range (0.5-4% O₂ depending on system type)

Inspect scrubber nozzles, cooling pipes, floats, sensors and demisters for fouling or scaling; verify cooling spray system operates uniformly; check for salt crystal formation (especially in water evaporation zones); inspect for corrosion on contact surfaces (SUS 316 material); clean demisters and verify gas-liquid separation; recommended twice yearly or per manufacturer schedule

Monitor dew point readings continuously (target: below -45°C for LNG/LPG, dry saturated for flue gas systems); test cooler and chiller effectiveness; inspect dryer unit redundancy (LNG/LPG systems); verify salt-crystal-free spray system functionality; check condensate drain lines for blockage; perform annual dew point trending analysis

Inspect seawater inlet/outlet for scale or debris; check for leaks in combustion chamber cooling jackets (particularly FU-type where seawater cooling is used); evaluate biofouling in cooling pipes; consider FU-type air-cooled burner alternative if corrosion issues persist; verify pump/fan operation; half-yearly inspection recommended, full dry dock overhaul per IMO intervals (typically 5-10 years)