The apprentices, the chillers,or the Vacstats.
In another life,when I did many years of commissioning, apart from leaks,moisture was the biggest issue with trying to get good vacuums.We used to purge every largish system with a full large bottle of medical grade dry nitro, before starting.Had heaps of success doing this.The suppliers of the standard dry nitrogen could not guarantee it was dry.The medical grade always sorted out the issue.
Des,what I recon they did is turned the switch to the fans off,its pretty easily accessible on that particular room, then set the spoons up.We also found a heap of spoons in the condensate tray,so I recon they have had a few goes at doing it before being successful.The fans are standard 300mm,the spoon will slide up through the guard and jam it, pretty easy to do, once you work it out and they have the luxury of having all day to work these sorts of things out.
Its a bit of a change from setting off the fire system by breaking a sprinkler head or punching an entrapment alarm in, just as they all head up to their bedroom suites.
At the youth centre,breaking a sprinkler head sets off the deluge systems, it floods the whole block, an absolute PITA,as it wrecks the whole place.
They are starting to modify this system so it can only be manually turned on by a staff member.
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Originally Posted by scarry
The apprentices, the chillers,or the Vacstats.
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