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<P DIR=LTR><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">All,</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">So I</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">ve got a question that I have the solution to, although I don</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">t know what caused the problem. I have a 50</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">,000 sf building with a central VAV unit with campus steam/chilled water</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">.</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"></FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">O</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">ne of the design options we</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">re looking at is adding a heat recovery chiller</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> (HRC)</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> on site to meet the (fairly substantial) summer reheat.</FONT></SPAN><SPAN LANG="en-us"> </SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">I had</FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">the</FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">building</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> modeled sans HRC</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">, and it autosized to</FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">about 0.9 cfm/sf</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">, giving me less than 3%</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> unmet load hours.</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> Yeehaw!</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> But when I added the HRC, modified the chiller equipment controls, and added a schedule for ho</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">t water supply temperatures</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> (to reflect the switchover from steam to recovered hot water)</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">, eQUEST auto</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"></FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">sized</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> my VAV</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> to 0.53cfm/sf and a boatload of unmet load hours.</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> Boooo.</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> I</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">m</FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">“</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">fixing</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">”</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> the problem by modifying my minimum CFM/sf in the afflicted zones</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> (I</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">ve got it back to a reasonable level of unmet load hours)</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">, but am struggling to understand why modifying my waterside equipment</FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">seems to have affected my</FONT></SPAN><SPAN LANG="en-us"> <FONT COLOR="#563B09" FACE="Calibri">auto sized</FONT></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri"> airside design so drastically.</FONT></SPAN><SPAN LANG="en-us"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">Any thoughts? </FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">Thanks,</FONT></SPAN><SPAN LANG="en-us"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT COLOR="#563B09" FACE="Calibri">Eric</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"></SPAN></P>
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