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(Credit: Michael Lee/ZDNet Australia)
Outside of the co-location farms are the computer room air conditioners, or CRACs. These are pressure controlled and connected to a dual-reticulation chilled water pipe system that runs below the access hallway (pictured).
Chilled water is provided from the mechanical plant in the centre, which also contains a massive chilled water buffer tank. This tank, which will be augmented with a second in the future, is able to provide 24 hours of cooling for a full design load. It is kept cooled at all times so that in the event of a power failure, where the centre's chillers and pumps are required to restart, cooling is maintained.
In the event that power to the centre is cut off, backup power is provider via diesel generator sets.
The generators are kept warm in order to be ready to receive load within 45 seconds of a mains failure, well within the centre's 10-minute UPS supply time.
In the event of prolonged failure, the centre has three 60-kilolitre underground fuel storage tanks, which sit directly below the generators, and contracts with two vendors to deliver fuel within four hours.
The generators are run twice a month to ensure they are prepared for a mains failure; once to check operation and once under full load. Similar to what occurs annually at SY1 and SY2, Equinix will also put the centre under a "dark side" test during which they shut off the mains power, simulating a power failure to check that its UPS and generators are working correctly.