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<DIV><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Charles,<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'>Regarding the DCV, you need to specify the “Minimum OA Control Method” under the Outdoor Air tab for the system to state whether the CO2 sensor is in the return or in the space. Then at the zone level, specify the “Minimum Flow Control” under the Air Flow tab to state if the minimum OA resets up or down depending on occupancy level. To ensure the amount of OA going into a space doesn’t go below the ASHRAE 62.1 minimum, I always input the OA Flow per Person and/or Flow per Area at the zone level as well. DCV has always been something I’ve been a little dicey about so any additional suggestions/comments would be great.<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'>Thanks,<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><div><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Matthew Larson, LEED AP BD+C<br></span></b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Project Engineer<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Energy Solutions Group<b><o:p></o:p></b></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>E M C Engineers, Inc.<br>Eaton’s Electrical Services & Systems <br>143 Union Blvd, Suite 350<br>Lakewood, CO 80228<br>tel: +1 303 328-3419<br>mobile: +1 303 668-2511<br>fax: +1 303 974-1239<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><a href="mailto:MatthewRLarson@Eaton.com">MatthewRLarson@Eaton.com</a> <br><a href="http://www.eaton.com/energysolutions">www.eaton.com/energysolutions</a> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><img alt=image001 border=0 height=101 id="Picture_x0020_1" src="cid:image001.jpg@01CBDE37.A986EA70" width=198></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><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>Greg Collins<br><b>Sent:</b> Tuesday, March 08, 2011 5:53 PM<br><b>To:</b> Charles Welch; equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] EMS Control System Modeling<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Charles - A quick suggestion for the setback is to try setting your system fans to "cycle on any." Otherwise, your system might not kick on to maintain setback temperatures. <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><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Greg Collins</span></b><span style='color:#1F497D'><br></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>GLUMAC | (949) 833-8190<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><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"'> Charles Welch [mailto:cwelch@capitalreviewgroup.com] <br><b>Sent:</b> Tuesday, March 08, 2011 4:24 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] EMS Control System Modeling<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I am doing an quick estimate for adding EMS control to an existing HVAC system (schools) which incorporate the following measures</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>1) Automatic thermostat setbacks for building occupation</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>2) Demand controlled ventilation</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>3) Economizers</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Here are my "challenges"<br>1) Simulation with setback temperatures shows no reduction in energy</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>2) I am unsure how to handle DCV</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>3) Simulation with economizers show very little reduction</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I would appreciate any pointers, suggestions, etc. on what to do here.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I would especially appreciate any example files to see how you input the data to get proper results.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks in advance for any help.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></DIV></BODY></HTML>