<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40" xmlns:ns0="urn:schemas-microsoft-com:office:smarttags"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
h4
{mso-style-priority:9;
mso-style-link:"Heading 4 Char";
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoBodyText, li.MsoBodyText, div.MsoBodyText
{mso-style-priority:99;
mso-style-link:"Body Text Char";
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.d2hmainlinknav, li.d2hmainlinknav, div.d2hmainlinknav
{mso-style-name:d2h_main_linknav;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.d2hbreadcrumbslinkseparator
{mso-style-name:d2h_breadcrumbslinkseparator;}
span.Heading4Char
{mso-style-name:"Heading 4 Char";
mso-style-priority:9;
mso-style-link:"Heading 4";
font-family:"Cambria","serif";
color:#4F81BD;
font-weight:bold;
font-style:italic;}
span.BodyTextChar
{mso-style-name:"Body Text Char";
mso-style-priority:99;
mso-style-link:"Body Text";
font-family:"Times New Roman","serif";}
p.doe-2input, li.doe-2input, div.doe-2input
{mso-style-name:doe-2input;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle23
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This is pretty easy with chiller sequencing.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Make sure to uncheck the “pro-rate” load box for the sequencing.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For the 1<sup>st</sup> page, with loads up to 150 tons, just put in CH-1.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For the 2<sup>nd</sup> page, with loads up to 350 tons, put in CH-2 only.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For the 3<sup>rd</sup> page, with 999 MBH limit (ie default), put in CH-1 and CH-2 with no max load for either chiller.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:teal'>GHT Limited<br></span></b><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><ns0:PersonName><span style='color:black'>James Hansen</span></ns0:PersonName></span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>, PE, LEED AP<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Senior Associate</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'><ns0:Street><ns0:address><span style='color:black'>1010 N. Glebe Rd, Suite 200</span></ns0:address></ns0:Street></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'><ns0:place><ns0:City><span style='color:black'>Arlington</span></ns0:City><span style='color:black'>, </span><ns0:State><span style='color:black'>VA</span></ns0:State><span style='color:black'> </span><ns0:PostalCode><span style='color:black'>22201-4749</span></ns0:PostalCode></ns0:place></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'>703-338-5754 (Cell)</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'>703-243-1200 (Office)</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'>703-276-1376 (Fax)</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:teal'><a href="http://www.ghtltd.com/"><span style='font-size:10.0pt'>www.ghtltd.com</span></a><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#31849B'><o:p> </o:p></span></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Carol Gardner<br><b>Sent:</b> Thursday, March 03, 2011 3:26 PM<br><b>To:</b> Fleming, Joe<br><b>Cc:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] chiller sequencing<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi Joe,<br><br>The info is actually pretty robust, it just hasn't been covered for while and no one seems to be using it much. So kudos to you. I am going to attach a screen shot below, but also refer you to Volume 3 of the manuals. That's where you'll find lots of in depth discussions. Some of the commands may be slightly different in name and format but I think you'll be able to figure them out.<br><br>Cheers,<br><br>Carol<o:p></o:p></p><div style='border-top:solid #999999 1.0pt;border-left:none;border-bottom:solid #999999 1.0pt;border-right:none;padding:0in 0in 0in 0in' id=nsbanner><div id=TitleRow><div id=ienav><p class=d2hmainlinknav> <o:p></o:p></p></div></div></div><div id=nstext><div id="d2h_breadcrumbs"><p class=MsoNormal>Volume 3: Topics<span class=d2hbreadcrumbslinkseparator> > </span>Central Plant Components<span class=d2hbreadcrumbslinkseparator> > </span><span style='color:white;background:#316AC5'>LOAD</span>-<span style='color:white;background:#316AC5'>MANAGEMENT</span> and EQUIP-CTRL<span class=d2hbreadcrumbslinkseparator> > </span>Examples of EQUIP-CTRL and <span style='color:white;background:#316AC5'>LOAD</span>-<span style='color:white;background:#316AC5'>MANAGEMENT</span> Sequences<o:p></o:p></p></div><h4>Example 1: Chiller Staging<o:p></o:p></h4><p class=MsoBodyText>Assume a central plant has three chillers: 200 tons, 400 tons, and 600 tons. By default, the program will use the 200 ton chiller whenever the <span style='color:white;background:#316AC5'>load</span> is in the range of 100-200 tons, the 400-ton chiller for <span style='color:white;background:#316AC5'>loads</span> in the range of 201-400 tons, etc.<o:p></o:p></p><p class=MsoBodyText>In this example, this is not the optimum control sequence, however, because the 200 and 600-ton machines are newer and much more efficient than the 400-ton machine. The following sequence will optimally <span style='color:white;background:#316AC5'>load</span> the newer machines and reserve the 400-ton machine for periods of maximum <span style='color:white;background:#316AC5'>load</span>:<o:p></o:p></p><p class=doe-2input>CHLR-CTRL = EQUIP-CTRL<br>TYPE = COOLING<br>CIRCULATION-LOOP = COOLING-LOOP<br><br><span style='color:white;background:#316AC5'>LOADS</span>-THRU-1 = 2.4 <i>Millions of Btuh</i><br>CHILLERS-1 = (CHLR-200)<br><br><span style='color:white;background:#316AC5'>LOADS</span>-THRU-2 = 7.2<br>CHILLERS-2 = (CHLR-600)<br><br><span style='color:white;background:#316AC5'>LOADS</span>-THRU-3 = 9.6<br>CHILLERS-3 = (CHLR-600,CHLR-200)<br><br><span style='color:white;background:#316AC5'>LOADS</span>-THRU-4 = 14.4<br>CHILLERS-4 = (CHLR-600,CHLR-200,CHLR-400)<br>..<o:p></o:p></p><p class=MsoBodyText>The spacing between <span style='color:white;background:#316AC5'>load</span> ranges is for clarity only; as with all BDL input, spacing has no effect on the meaning of the input. <o:p></o:p></p><p class=MsoBodyText>Some types of equipment, such as chillers and cooling towers, have a capacity that varies hourly in accordance with ambient temperature and/or other conditions. Therefore, it often makes sense not to have to specify a fixed <span style='color:white;background:#316AC5'>LOADS</span>-THRU range, but to allow the range to default to the hourly capacity of the equipment listed within the range. If you do not specify the <span style='color:white;background:#316AC5'>LOADS</span>-THRU keyword, the value will default to the hourly capacity. The following is equivalent to the example above, but takes into account the varying hourly capacities:<o:p></o:p></p><p class=doe-2input>CHLR-CTRL = EQUIP-CTRL<br>TYPE = COOLING<br>CIRCULATION-LOOP = COOLING-LOOP<br><br>CHILLERS-1 = (CHLR-200)<br>CHILLERS-2 = (CHLR-600)<br>CHILLERS-3 = (CHLR-600,CHLR-200)<br>CHILLERS-4 = (CHLR-600,CHLR-200,CHLR-400)<br>..<o:p></o:p></p><p class=MsoBodyText>Also, while the above input works, it uses more keywords than is needed; also for clarity. The following input is equivalent:<o:p></o:p></p><p class=doe-2input>CHLR-CTRL = EQUIP-CTRL<br>TYPE = COOLING<br>CIRCULATION-LOOP = COOLING-LOOP<br><br>CHILLERS-1 = (CHLR-200)<br>CHILLERS-2 = (CHLR-600,CHLR-200,CHLR-400)<br>..<o:p></o:p></p><p class=MsoBodyText>This input, while shorter than the previous, is also somewhat overspecified because the default sequencing for the EQUIP-2 list is the order entered. In other words, the CHILLERS-SEQ-2 did not need to be listed in this example. <o:p></o:p></p><p class=MsoBodyText>If sequencing is not specified, equipment is started in the order listed. The following examples are equivalent, and illustrate how sequencing works:<o:p></o:p></p><p class=doe-2input> <span style='color:white;background:#316AC5'>LOADS</span>-THRU-2 = 999.<br>CHILLERS-2 = (CHLR-600,CHR-200,CHLR-400)<o:p></o:p></p><p class=doe-2input> <span style='color:white;background:#316AC5'>LOADS</span>-THRU-2 = 999.<br>CHILLERS-2 = (CHLR-600,CHR-200,CHLR-400)<br>CHILLERS-SEQ-2 = ( 1, 2, 3) <o:p></o:p></p><p class=doe-2input> <span style='color:white;background:#316AC5'>LOADS</span>-THRU-2 = 999.<br>CHILLERS-2 = (CHLR-200,CHLR-400,CHLR-600)<br>CHILLERS-SEQ-2 = ( 2, 3, 1) <o:p></o:p></p><p class=MsoBodyText>In all these examples, CHLR-600 starts first, followed by CHLR-200, followed by CHLR-400. To force CHLR-600 and CHLR-200 to always start and run together, give them the same sequence number:<o:p></o:p></p><p class=doe-2input> <span style='color:white;background:#316AC5'>LOADS</span>-THRU-2 = 999.<br>CHILLERS-2 = (CHLR-200,CHLR-400,CHLR-600)<br>CHILLERS-SEQ-2 = ( 1, 2, 1) <o:p></o:p></p><p class=MsoBodyText> <o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Thu, Mar 3, 2011 at 11:58 AM, Fleming, Joe <<a href="mailto:joe.fleming@tlc-eng.com">joe.fleming@tlc-eng.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>How would one sequence chillers in the following way?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chiller 1 - up to 150 tons<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chiller 2 - 150-350 tons (Chiller 1 is off in this range)<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chiller 1&2 - 350-500 tons<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The Load range tab provides a "max load", but I believe that when I move to step 2 that equest is going to keep both chillers on. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>i.e. for an input such as;<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chiller-Seq-Max Load<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chiller 1 - 1 - 150<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chiller 2 - 2 - 350 <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Should you utilize the different "Load Ranges" here? <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The help file for this sections is not as robust as the other help sections.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thank You<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>Joe Fleming</b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><i><span style='font-size:10.0pt;color:#333333'>E.I., LEED AP BD+C, BEMP</span></i><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><i><span style='font-size:10.0pt;color:#333333'>Mechanical Engineer II</span></i><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'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='color:#006363'>TLC Engineering for Architecture<br></span></b><b><span style='font-size:10.0pt;color:#006363'>Your 2030 Challenge Partner</span></b><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'> </span><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'>800 Fairway Drive, Suite 250</span><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'>Deerfield Beach, FL 33441-1816</span><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'> </span><o:p></o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:right'><span style='font-size:9.0pt;color:#333333'>phone: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt'>954-418-9096</span><o:p></o:p></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:right'><span style='font-size:9.0pt;color:#333333'>fax: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt'>954-418-9296</span><o:p></o:p></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:right'><span style='font-size:9.0pt;color:#333333'>direct: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt'>954-418-4591</span><o:p></o:p></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:right'><span style='font-size:9.0pt;color:#333333'>website: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt'><a href="http://www.tlc-engineers.com/">www.tlc-engineers.com</a></span><o:p></o:p></p></td></tr></table><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><a href="http://www.tlc-engineers.com/"><span style='text-decoration:none'><img border=0 width=700 height=49 id="_x0000_i1025" src="cid:image001.gif@01CBD9B8.45E50D40" alt="http://www.tlc-engineers.com/images/TLC_Sig_Loc_Block.gif"></span></a><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p></div><p class=MsoNormal><br><br><br>-- <br>Carol Gardner PE<o:p></o:p></p></div></body></html>