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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I’d be very appreciative is someone
could shed some light on a couple of errors that getting in eQuest. The
system I’m modeling is a “power induction unit”. I’m
using eQuest version 3.63, build 6359.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>General notes concerning the model in
question:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>1) The model I’m running is of an
elementary school <st1:place w:st="on"><st1:City w:st="on">Houston</st1:City>, <st1:State
w:st="on">TX</st1:State></st1:place>.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>2) The building has a lower than normal
sensible cooling load which is resulting in a very high percentage of OA
(extremely high percentage at low load conditions).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>3) I don’t have pre-heat or heating
coils defined but when I review an hourly report I can see that an
electric heating source is being added automatically.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>4) I’ve defined my coiling coil
leaving air temperature as 55F. Even with cooling control set to constant,
leaving air temperatures rise to 65F. Would the high percentage of OA cause
this?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>7) Per the hourly report I can see that
the unit is heating and cooling at the same time but I don’t know how to
stop that from occurring.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>8) This is for a LEED base line model, so
I do not have an economizer installed, (not that it would help much in <st1:City
w:st="on"><st1:place w:st="on">Houston</st1:place></st1:City>).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font><font color=black
face=Arial><span style='font-family:Arial;color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>*Error #1 - This error appears only in
the QC Details below 4) Hours of Operation:</span></font><font color=black><span
style='color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Fan vs. Occupancy Hours: The average
hours of occupied light operation / fan operation ration for the building is
21.73 and appears high (error above 1.75, see PS-E & SS-C reports).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I don’t understand what the error
is, what values are used to calculate the ratio and how the ratio & the
PS-E & SS-C play into the error.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>*Error #2 - This error shows up both in
the “REPORT- ATTN” error log of the “Simulation Output”
and the QC Details 5) HVAC Equipment Descriptions under the tools menu:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>In curve: Variable Speed Drive FPLR the
dependant value<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Is exceeding the limits<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Value/Min/Max/First time: 1.257 / 0.100 /
1.000 / 12.31.24<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>If I’m reading this error correctly
the output on my VFD is going above 1. What I find odd is that the 1st time
the error is exceeded is on the very last day and hour of the year. Seems odd
that I would only get this error on the last hour of the simulation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>*Error #3 - <a name="OLE_LINK1">This
error appears only under the QC Details below 7) HVAC Load & Performance
Results</a>:</span></font><font color=black face=Arial><span style='font-family:
Arial;color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Cooling Coil Loads:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>System “1<sup>st</sup> VAV Unit has
a high Winter/Sumer cooling coil load ratio of 0.67 (error over 0.25, see SS-D report).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>*Error #4 - This error appears only under
the QC Details below 7) HVAC Load & Performance Results:</span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Reheat Loads:</span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>System ‘1<sup>st</sup> VAV
Unit’ Coincident Cool & Heat / Heat hr ratio of 0.76 is unusually
high (error if > 0.50, see SS-C report).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Any help is appreciated, thank you very
much!</span></font><font color=black face=Arial><span style='font-family:Arial;
color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=green face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:green'>Mark R. Seibert, PE, LEED AP</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Principal</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>CMTA Consulting Engineers, Inc.<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>10101 Linn Station Road</span></font></st1:address></st1:Street><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>Louisville</span></font></st1:City><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>, <st1:State
w:st="on">Ky</st1:State> <st1:PostalCode w:st="on">40223</st1:PostalCode></span></font></st1:place><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>502.326.3085<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><a href="http://www.cmtaegrs.com"><font color=green><span
style='color:green'>www.cmtaegrs.com</span></font></a></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=green face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:green'>We've Gone Green!</span></font> <font
size=2 color=green face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:green'>Please verify the necessity of printing this email – thank
you.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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