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EBOM-2009 EAp1:Energy Efficiency Best Management Practices

System narrative

Hi all, I am currently working on a retail mall that starts operating from 10am to 10pm. So it is quite straightforward that the main centralised chilled water plan system starts operating from 10am to 10pm. However, the mall has a small chiller that starts slightly earlier, say 730am to 10am, just to cool down the building spaces before the building starts operating. In my opinion, i think we should be able to omit this "pre-cool" system from the system narrative, building operation plan and sequence of operation. However, is there anyone else with more experience can share with me if they think that the "pre-cool" system should be included into the system narrative, building operation plan and sequence of operation? Thank you very much on the sharing of views. Cheers, YingYing

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Wed, 07/31/2013 - 15:52

Hi YingYing You should definitely include this precool in your systems documentation. It seems like it could be a fairly easy addition, that I see could map to the following documents accordingly: - Systems narrative: include one sentence similar to what you explained above detailing that there is an X-ton unit that precools the building in the morning. - Building Operating Plan: Using the BOP template on LEEDuser, modify it to include one line for the main chillers operating schedule and another line for the start-up chiller operating schedule - Sequence of Ops: you only have to include two system excerpts here, so you don't necessarily have to include chillers in your documentation. But if you do, format your sequence of ops to start when the building starts. In other words, include a sentence at the beginning that states something along the lines of "A small chiller precools the building at 7AM, prior to the main building chillers that go on at 10AM" And be sure to also include these chillers in your preventative maintenance plan. Hope this helps Hannah

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