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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Jamie,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>You have some inconsistencies in your inputs for the OA on system RTU-2 (and all the rest). See highlighted area below. You are saying that the system is 100% recirc by setting the Minimum Outside Air ratio to 0.00, but your Minimum Air Schedule (note that this is a fraction of the design supply CFM type of input) is saying otherwise and takes precedence causing it to be a 100% OA system. See my snip from the hourly reports below too. You need to develop the proper ventilation rates for each system and verify with hourly reports. Do not rely on the summary tab in the air side system tab of eQUEST to give you correct data at all times. If you just define the OA by using the Minimum Outside Air ratio, you will be supplying OA every time the fan operates. To prevent this you need to set up Minimum Air Schedule for each system which is based upon the proper fractions for that system. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><img width=531 height=448 id="_x0000_i1027" src="cid:image002.png@01CD44CC.A88618B0"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><img width=1024 height=661 id="Picture_x0020_2" src="cid:image003.png@01CD44CD.20AD86C0"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p> </o:p></span></p><div><div><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>Timothy Howe, MS, LEEDŽ AP BD+C</span></b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><br>Mechanical Engineer<br>Stantec<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:gray'>61 Commercial Street<br>Rochester NY 14614<br>Ph: (585) 413-5347<br>Fx: (585) 272-1814<br>Cell: (585) 330-8681<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.0pt;font-family:"Arial Narrow","sans-serif";color:blue'><a href="http://www.stantec.com"><b><span style='color:#993333;text-decoration:none'>stantec</span></b><span style='color:#003F6E;text-decoration:none'>.com</span></a> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization. If you are not the intended recipient, please delete all copies and notify us immediately.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div></div><p class=MsoNormal><span style='font-size:13.5pt;font-family:Webdings;color:#008040'>ü</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:blue'> </span><span style='font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:#008040'>Please consider the environment before printing this email.</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:blue'> </span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><o:p></o:p></span></p><div><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>Armstrong, Jamie<br><b>Sent:</b> Thursday, June 07, 2012 4:23 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] Can't get unmet hours under control for cooling<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I need some help getting these cooling unmet hours under control. I have to get this model complete and submitted by tonight.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We’ve tried multiple things to try to get the model to work out. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We’ve tried the following:<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>ˇ<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Letting eQuest autosize the heating and cooling for the PSZ units<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>ˇ<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Verified that the schedules are consistent with both cooling, heating, and occupancy.<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>ˇ<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>On the baseline building we have the min cfm set to 0.5 for most spaces and 1 cfm/sf for some of the larger spaces.<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>ˇ<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>We set the PSZ –fan – flow parameter – indoor fan mode to intermittent to get the unit to show partial capacity thru out the days.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>One item is RTU-2 in my model. It serves only one space. We have a high amount of unmet hours on this and we are letting it auto size the capacity and airflow and it still says its not staying under control. We’re assuming that we are missing one small check box that’s somehow causing these unmet hours.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve attached the pd2 files for both baseline and proposed along with weather data and inp files.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks in advance for any help!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Verdana","sans-serif";color:#404040'>Jamie Armstrong </span></b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#404040'>P.E.</span><b><span style='font-size:12.0pt;font-family:"Verdana","sans-serif";color:#404040'><br></span></b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#404040'>Mechanical Engineer<br><br><img border=0 width=264 height=53 id="Picture_x0020_1" src="cid:image001.jpg@01CD44CC.14E26190" alt="Description: Description: image001"><br><br>v. 210.546.0200 | <a href="http://www.dbrinc.com">www.dbrinc.com</a></span><span style='color:#404040'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>