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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I’m modeling an ice storage system…the chilled water system has four (4) chillers…from 8am to 8pm the four chillers work together to output 40*F leaving CHW after the ice tank is fully discharged…from 8pm to 8am only TWO of the chillers work together to output 24*F leaving CHW to charge the ice tanks. Here’s what I’ve done so far to model this system…<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>I’ve modeled SIX chillers even though there are only four…the normal 40*F LCHWT operation chillers have an EER of 8.4, whereas the 24*F LCHWT operation chillers during ice mode have an EER of 7.6, so 4 of the 6 chillers modeled are really just 2 chillers as they are a ‘normal mode’ and ‘ice mode’ for two of the chillers as I have to have those different EER values in there. The other 2 chillers are just ‘normal mode’ as they aren’t on during ice charging.<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>I have a charging schedule set up from 8pm to 8am with a value of ‘1’ and 8am to 8pm with a value of ‘0’.<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>I have a loop setpoint schedule set up from 8pm to 8am to be 24*F and 8am to 8pm to be 40*F.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My question is, how can I schedule the chillers so that the two ‘ice mode’ chillers are on from 8pm to 8am, and the four ‘normal mode’ chillers are on from 8am to 8pm?? The ‘Equipment Controls’ only allow LOAD defined management, and not Time-Of-Day defined management. And there also aren’t any “Availability” schedule options like there are for air-side systems.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any suggestions would be very helpful!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br><b>Josh Greenfield</b>, </span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'><a href="http://www.idfpr.com/dpr/WHO/pe.asp"><span style='color:black'>PE</span></a>, <a href="http://www.cityofchicago.org/city/en/depts/bldgs/supp_info/chicago_energy_conservationcodeoverview.html"><span style='color:black'>REP</span></a>, <a href="http://www.gbci.org/main-nav/professional-credentials/credentials.aspx"><span style='color:black'>LEED AP BD+C</span></a>, <a href="http://www.ashrae.org/certification/page/2491"><span style='color:black'>BEMP</span></a></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>Energy Services Manager<br>Associate Vice President<br>312.242.6392 Direct<br>jgreenfield@primerachicago.com<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><img border=0 width=144 height=29 id="Picture_x0020_1" src="cid:image001.jpg@01CC1A27.E4556470" alt="Description: Logo-CMYK-Resume"><br>Primera Engineers, Ltd.<br>100 S. Wacker Drive, Suite 700<br>Chicago, IL 60606<br>312.606.0910 Main<br>312.606.0415 Fax<br></span><span style='font-size:10.0pt;color:#4F6228'><a href="http://www.primerachicago.com/" title="blocked::http://www.primerachicago.com/"><span style='font-family:"Arial","sans-serif";color:#4F6228'>http://www.primerachicago.com</span></a></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br><br></span><span style='color:#4F6228'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>