Drum vs. Core

Pete Turnbull pete at dunnington.plus.com
Wed Jul 4 19:46:56 CDT 2007

On 04/07/2007 23:54, Roger Holmes wrote:
>> From: Pete Turnbull <pete at dunnington.plus.com>

>> After a few panicky minutes, we realised it was the aircon.
>> Normally it works hard to cool the room, but it's designed to maintain a
>> certain temperature.  With all the servers switched off, it was trying
>> for the first time in years to heat the place up, and of course the
>> heating coils were full of dust.
> Almost 
> back to topic, air conditioning systems are supposed to filter out dust, 
> so if there was dust in the heating coils, does this means it was not 
> working properly?

I think the small ones, which are a few kW apiece, do, but the two big 
ones (about 60kW) in the machine room don't really filter the air much. 
  They're really just meant to keep the temperature and humidity in 
reasonable bounds.

Pete						Peter Turnbull
						Network Manager
						University of York

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