Thanks for your response man, and holy shit im scared to run this thing 24/7 now in my house hahahha, sometimes the room can get 30 to 35 degrees ambiant on a hot day i might just cut my losses and sell the unit!
The wire switch needed is to swap the tachometer and ground pins. It's rather easy: use a flat-blade screwdriver or the end of a tweezer to push the pin in, pull the wires out, and reinsert them after swapping.
I found that the Delta FFB0412VHN (40x28, 15.8CFM, 9500RPM, 45 dbA) is a reasonable swap. They are loud at boot, but after switching to fan speed 1, they run at 3400RPM and aren't
audible at that speed unless you listen for them. On my 7250-48P, ASIC temperature is currently about 77C and the POE sensor is only at 28.5C. The FFBs also have an operating voltage range down to 4.5V, while the EFB's are only specced to a 7V minimum voltage.
Btw, does anyone know what the temperature thresholds for the 7250P model POE sensor are supposed to be? My unit says 41/34, but the
Ruckus docs say that's for the 7250-24P, and the -48P is supposed to be 57/49 -- is that a typo in their table?
CFM requirements from data sheet:
ICX 7250-24G: 14.3 CFM (Maximum), 5.7 CFM (Typical) ICX 7250-24 : 14.0 CFM (Maximum), 5.7 CFM (Typical) ICX 7250-24P: 34.4 CFM (Maximum), 13.7 CFM (Typical) ICX 7250-48: 34.8 CFM (Maximum), 13.8 CFM (Typical) ICX 7250-48P: 45.2 CFM (Maximum), 21.4 CFM (Typical)