<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></style>
</head>
<body class='hmmessage'>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Dear e-quest users,</FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3></FONT> </P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Has anyone had success modeling 2-pipe fan coils with electric shoulder?</FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>The system operates using the following schedule: </FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.5in; TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT face="Times New Roman"><SPAN style="mso-list: Ignore"><FONT size=3>-</FONT><SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><FONT size=3>Fan coils provide cooling March through December</FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.5in; TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT face="Times New Roman"><SPAN style="mso-list: Ignore"><FONT size=3>-</FONT><SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><FONT size=3>Fan coils provide heating December through March</FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.5in; TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT face="Times New Roman"><SPAN style="mso-list: Ignore"><FONT size=3>-</FONT><SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><FONT size=3>Supplemental electric heaters will provide heating during October, November, April and May when required.</FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>I was able to model 2-pipe fan coils by connecting 4 pipe fan coil to 2 pipe circulation loop and using schedules to define changeover criteria. This model gave me a high number of unmet load hours, much higher than I expected. As I could not figure out how to model supplemental electric heat I switched back to 4-pipe fan coils and assigned availability schedules to heating and cooling. With this configuration, I tried to use electric baseboards and baseboard schedules based on outside temperature, but my unmet hours went up, offcourse this time in cooling. I tried changing capacities of baseboards and the baseboard reset schedule, all without any success. The only idea that I could think off is to manually calculate heat load and electricity consumption for spring-fall months. This is a huge building with almost hundred of FCs, and I am still hoping there is some better solution.</FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Any thoughts?</FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>All ideas are greatly appreciated.</FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>Ana</FONT></FONT></P> </body>
</html>