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<p class="MsoNormal"><span style="color:#1F497D">If you want to bypass the error completely you can set your chilled water supply temperature lower (say 41) to satisfy the 6 Deg delta T eQuest is looking for and then use a temperature reset schedule to have
the chilled water loop operate where you want it too. Good trick for low air temp systems where this error gets in the way.<o:p></o:p></span></p>
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<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>Hall, Brendan<br>
<b>Sent:</b> Tuesday, November 05, 2013 1:34 PM<br>
<b>To:</b> Sami, Vikram; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Cooling coil leaving temp error<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">I would say that is the likely culprit. The commonly used keyword is zone entering temperature (MIN-SUPPLY-T), not the coil leaving temperature. The coil temperature will be variable depending on how much heat
gain the fan provides and the throttling range of the coil controller. In this case, the coil leaving temperature would likely be around 50 degrees if you have that much fan gain and I could see that generating that error. 5 degrees is on the high side for
a fan, so check what number you are using to determine what the power input is. I always use the bhp not the nameplate to determine the kw/cfm of the fans.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Brendan Hall, PE, LEED AP </span>
<span style="font-size:8.0pt;color:black">BD+C</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Engineer, Mechanical<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:13.5pt;font-family:"Arial","sans-serif";color:red">karpinski<br>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<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"">
<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Sami, Vikram<br>
<b>Sent:</b> Tuesday, November 05, 2013 4:02 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Cooling coil leaving temp error<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial Narrow","sans-serif"">I’m running a simulation where I get the following error:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial Narrow","sans-serif""> </span><o:p></o:p></p>
<p class="normal"><span style="font-size:8.0pt;font-family:"Courier New"">In EL1 Sys1 (VAVS) (G) , cooling coil leaving temperature must</span><o:p></o:p></p>
<p class="normal"><span style="font-size:8.0pt;font-family:"Courier New""> be at least 6F higher than entering water temp.</span><o:p></o:p></p>
<p class="normal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial Narrow","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial Narrow","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial Narrow","sans-serif"">I checked my temps – the entering water temp is 44 degrees, and the coil leaving temp is 55. I have a 5 degree delta T on the fan – could that be causing this? </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial Narrow","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="line-height:12.0pt"><b><span style="font-size:9.0pt;font-family:"Futura LT Book";color:#E33B45">Vikram Sami</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
</span><span style="font-size:7.0pt;font-family:"Futura LT Book";color:#666666">BEMP, LEED BD+C</span><span style="font-size:9.0pt;font-family:"Futura LT Book";color:black"> </span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
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