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<div class=Section1>
<p class=MsoNormal><span style='color:#1F497D'>Bill,<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'>I tried to reduce the
MAX-FAN_RATIO to 1.0 but the caution message propped up.<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'>As suggested by you, I changed
max output ratio to 1.20 in the curve but received the attached message.<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'>What should be next step?<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'>Rakesh<o:p></o:p></span></p>
<p class=MsoNormal><span style='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"'> Bishop, Bill
[mailto:bbishop@pathfinder-ea.com] <br>
<b>Sent:</b> Tuesday, April 09, 2013 7:14 PM<br>
<b>To:</b> rakeshdesai@ecpl.co.in; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Caution Message<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Rakesh,<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'>The FC-Fan-w/Dampers curve
determines fan power as a function of part load. I’m guessing that the system
that you have applied this curve to has a MAX-FAN-RATIO greater than one, which
is causing the output of the curve to exceed the OUTPUT-MAX.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The OUTPUT-MAX for the curve is
1.05, as shown on the warning message and in the curve properties dialog box
(see below).<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The warning message is showing
that the fan power is being limited to the maximum allowable by the curve. The
flow through the supply fan is exceeding 100% of design value, but the power is
not increased accordingly.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>You can reduce the MAX-FAN-RATIO
to 1.0 assuming the fan is limited in that way. Alternatively, you could
increase the curve OUTPUT-MAX, either in the library curve or by creating a new
curve as I have shown below. This will extrapolate values of the curve beyond
their intended range, so the accuracy of the fan power at greater than design
flow may be a little off, but it is certainly better than not making any
changes.<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'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Bill<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'><img width=475 height=305
id="Picture_x0020_2" src="cid:image001.jpg@01CE35CF.969DF600"><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'><img width=476 height=281
id="Picture_x0020_3" src="cid:image002.jpg@01CE35CF.969DF600"><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";
color:black'>William Bishop, PE, BEMP, LEED AP </span></b><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";
color:#006600'>|</span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";
color:black'> Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>Senior Energy Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:5.0pt;font-family:"Arial","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>134 South Fitzhugh Street</span><span style='font-size:9.0pt;
font-family:"Times New Roman","serif";color:#1F497D'>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Rochester, NY 14608<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>T: (585) 325-6004 </span><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:black'>Ext. 114</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>F: (585) 325-6005</span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><a
href="mailto:wbishop@pathfinder-ea.com"><span style='font-size:9.0pt;
font-family:"Arial","sans-serif"'>wbishop@pathfinder-ea.com</span></a></span><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>
</span><span style='color:#1F497D'><a href="http://www.pathfinder-ea.com/"><span
style='font-size:9.0pt;font-family:"Arial","sans-serif"'>www.pathfinder-ea.com</span></a></span><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:Webdings;
color:green'>P</span><span style='font-size:14.0pt;font-family:"Times New Roman","serif";
color:green'> </span><span style='font-size:7.5pt;font-family:"Times New Roman","serif";
color:green'>Sustainability – the forest AND the trees.</span><span
style='font-size:18.0pt;font-family:Webdings;color:green'> </span><span
style='font-size:14.0pt;font-family:Webdings;color:green'>P</span><span
style='font-size:14.0pt;color:green'> </span><span
style='color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='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>Rakesh
Desai<br>
<b>Sent:</b> Tuesday, April 09, 2013 8:40 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Caution Message<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>While running my proposed case, I am getting the attached
caution message.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Can anyone help me to understand what it is meant and how to
solve the problem?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Rakesh Desai<o:p></o:p></p>
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