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<DIV><SPAN class=360040906-07022006><FONT face=Arial color=#0000ff size=2>This
is telling you that your entering chilled water temperature must be at least 6
degrees below your coil leaving temperature. Since your cooling supply
temp is 52 degrees, your chilled water temperature would have to be 46 degrees
or less. If it is less than that, check for CHW temperature reset.
You could also have some heat gain in the SA duct, requiring an even lower coil
leaving temperature and CHW temperature.</FONT></SPAN></DIV>
<DIV><SPAN class=360040906-07022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=360040906-07022006><FONT face=Arial color=#0000ff
size=2>Incidentally, I believe this was added with DOE-2.2. Prior to that
DOE-2.1E and most other simulation programs didn't care if your coil
expectations were possible or not. They just did a BTU transfer, so you
could have a supply air temperature lower than your entering CHW
temperature.</FONT></SPAN></DIV>
<DIV><SPAN class=360040906-07022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=360040906-07022006><FONT face=Arial color=#0000ff
size=2>Mike</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> bldg-sim@gard.com
[mailto:bldg-sim@gard.com]<B>On Behalf Of </B>Scott Runyon<BR><B>Sent:</B>
Monday, February 06, 2006 10:45 PM<BR><B>To:</B>
bldg-sim@gard.com<BR><B>Subject:</B> [bldg-sim] eQUEST-cooling coil leaving
temp troubles<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=Normal><FONT face="Courier New" size=1><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Courier New'">In EL1 Sys1 (VAVS)
(B) ,
cooling coil leaving temperature must<o:p></o:p></SPAN></FONT></P>
<P class=Normal><FONT face="Courier New" size=1><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Courier New'">
be at least 6F higher than entering water temp.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">I have this exact error multiple
times.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">I know this is like asking for a
needle in a hay stack, but can anyone give me some areas to
check.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">I have a standard VAV
system(with hw reheat) and chilled and hot water
coils.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Thermostat
setpoints:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Occupied
(Cooling/Heating):72/68<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">UnOccupied
(Cooling/Heating):75/64<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Design
Temps:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Cooling (Indoor/Supply):
72/52<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Heating (Indoor/Supply):
68/55<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Baseboards:none<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Heat/reheat: 20deg (this was
untouched)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Economizer:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Dry Bulb Temp
65deg<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Any help would be extremely
appreciated.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Thanks in
advance.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">-Scott</SPAN></FONT><o:p></o:p></P>
<P><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> </SPAN><o:p></o:p></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV><PRE>
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