Port de Plaisance de Gustavia, Saint Barthélémy, FWI The 230V fan that is located above the generator runs only once the generator is started. Of course the amount of air circulated is less than if the fans were powered with 24V, but it is still far enough (as you can feel when you put your hand on the air deck output. This means you can run the fans without running the engine.but bear in mind that you will drain the starter battery after a few hours. The fans run as soon as you power the engine with the key. In fact, if you install 12V fans, they will constantly run with 14V+ (because of the engine alternator) and will quickly quit (after 200 hours). ![]() This was designed on purpose, in order to make their life longer. Since 1989, the engine room fans (on SMs and 54s) are 24V ones, running with 12V. Here is what Olivier explained to us about the 24 volt fans on 12 Volt circuit. The Jabsco 35440-0010 will last 1000 hourīut you can replace it with the Jabsco 35770-0094 (same performance ) but will last 5000 hours The intake is a Jabsco 35440-0010 250 CFM Blower That 24 Volt is also connected to the 12 Volt starting battery of the engine. The last fan is for “Suction” or “intake” and has the air intake behind the Amel Logo: ![]() (Olivier explained to us, it was so they last longer, see what he wrote below) The 220 Volt works with the Generator, while the 24 Volt works with the engine (and as you will see is connected to the 12 Volt starting battery). On my link, you will find all the explanation of the engine fans, including a picture of the SM2K Owner Manual:Ģ fans for Extraction: 1 is 220 Volt and 1 is 24 Volt and they will send the air to the same exhaust (which is on the Port side outside the cockpit (picture on the link). If you do not feel air when the engine is running and your breaker/Diruptor are on, it means likely the fan died (I had to replace mine 4 years ago) - just in case check that you can measure 12 Volt to the wires, if you can, then definitely the fan has died. If you feel the fan when running the generator, it means your 220 Volt fan is working.
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