How are we able to design the electrical work system so that we are able to minimize the UPS capaicity? The Uptime Institue only require UPS for the fan & pump only.
Never mind what the Uptime Institute has to say about this issue.
What do the project specifications have to say about it? For when it comes time to explain why a solution was engineered to a certain performance criteria, your customer is not going to give a hoot about what the institute of whatever had to say on the issue. The only thing they will care about is that they specified "X" and you designed it to "Y" instead.
If in the project specifications, it is mandated that the cooling system for the data center must function normally during a loss of the main power to the facility, then you must engineer a solution that takes that into consideration.
Consider the starting demand of the cooling unit and the running demand and give yourself a 5-10% safety factor. Use this data to ensure that the static UPS has enough of a KVA rating to 1) start the system without dropping the delivered voltage level to other equipment connected to it and that 2) the battery life is adequate to supply the running demand and the load from the data equipment (plus a reserve) for the period of time that has been mandated in the specs.
Your project's design specs from your customer is the design criteria, period. Not what someone else has to say on the matter.
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Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".
Data Centre Continuous Cooling 
Re: Data Centre Continuous Cooling
