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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">PTAC may not serve your purposes if the project unit ventilators have economizers. PTAC does not include the option for economizer. The PSZ system will work fine
in either case – with or without economizer. The DOE22Vol3 – Topics manual mentions using the PSZ system to represent school classroom unit ventilators. See page 225.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<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"><img width="108" height="43" id="Picture_x0020_2" src="cid:image001.png@01D15E5B.98CBC120" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1C467A"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1C467A">Christopher Jones,</span></b><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">
</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.Eng.<i>
<br>
</i></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Senior Engineer<b><o:p></o:p></b></span></p>
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<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">WSP Canada Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">2300 Yonge Street, Suite 2300<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Toronto, ON M4P 1E4</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#595959"><br>
</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">T +1 416-644-4226<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">F +1 416-487-9766<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">C +1 416-697-0056<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 [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Julien Marrec<br>
<b>Sent:</b> Wednesday, February 03, 2016 2:52 AM<br>
<b>To:</b> Jayant Patil<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] 4 Pipe FCU- Refrigerant lines (supply and return) instead of CHW lines<o:p></o:p></span></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal">I think you can make do with a hot water PTAC, as long as you specify the performance of the DX cooling based on your outdoor+indoor unit for fan power.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal">Julien <br>
<br>
Envoyé de mon iPhone<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
Le 2 févr. 2016 à 21:14, Jayant Patil <<a href="mailto:jppatil@gmail.com">jppatil@gmail.com</a>> a écrit :<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Hi,</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<span style="font-family:"Arial","sans-serif";color:black">I am looking to model a custom built up unit ventilator for classroom building. The UV in classroom is basically a 4 pipe FCU system. The HW is supplied by natural gas boiler. Instead of CHW water lines,
an outdoor split system (air condenser) is utilized to run the refrigerant (supply and return)lines to the UV.</span><span style="color:black"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:15.0pt;margin-left:0in">
<span style="font-family:"Arial","sans-serif";color:black">In e-quest, if FC is used as system type, a CHW loop is required (which is not present in this case). Therefore, for a custom system like this, is it safe to model the air side system as "residential
split unit" and HW loop for the heating side? Since the cooling is provided by a split system, I thought a RESYS2 system will be ok?</span><o:p></o:p></p>
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<span style="font-family:"Arial","sans-serif";color:black">Has anybody encountered such type of system before to model in e -quest?</span><span style="color:black"><o:p></o:p></span></p>
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<span style="font-family:"Arial","sans-serif";color:black">Thanks</span><span style="color:black"><o:p></o:p></span></p>
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