Clive said:
I'm looking for external 240v fans and a controller - so the fans will come
on if the temp in the cupboard where my file/print server (on 24/7) gets
above a certain temp and suck the hot air out. I have plenty of vents into
the cupboard.
Clive
To do exactly what you want, you can use a line voltage thermostat for
cooling (contacts close when temperature exceeds setting), i.e.
"
http://www.iaqsource.com/index.php?module=product&prod_cat=124&prod_mfg=0&prod_sub_cat=0&prod_id=577"
Similar type controls are probably available with Celsius markings.
Just connect your 240V fans directly to the thermostat, see
"
http://www.luxproproducts.com/pdfs/lv3_eng.pdf"
I guess the limitation is that you can't go over 90 degrees Farenheit
before the fan comes on, but you could position it in the cupboard to
get a lower or higher ambient as needed.
Be sure not to buy a line voltage thermostat for heating, since on those
the contacts close when the temperature goes below the setting.
240VAC fans are available, though they are much more expensive than
12VDC fans. I.e. see
"
http://www.newark.com/NewarkWebCommerce/newark/en_US/endecaSearch/partDetail.jsp?SKU=92N4759&CMP"
You might be better off using a 12V, temperature controlled fan, mounted
to a good place in the cupboard. You can run it off the 12V from the
server. But it won't go all the way off, and the temperature versus rpm
isn't adjustable, "
http://www.thermaltake.com/dcfans/standard/a1214.htm"
