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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Did you try looking at the hourly reports
for the equipment that should be generating the loads? If the AHUs and
zone coils are calling for heat but it isn’t being supplied, then it
could be a problem with the hydronic system inputs. If there is not a
load on the coils, then the problem may lie in the airside system inputs.
This is typically where I start when I have this problem. I have had this
happen when I have unconditioned zones being served by a system intended to
serve conditioned zones. If I have any unconditioned zones, I put them
under a ghost single-zone system that only serves unconditioned zones (uses no
fan power, cooling, etc).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I hope this helps!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Eric<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
style='font-size:10.0pt;color:navy'>Ph: (781) 431-1100 ext 12<br>
Fax: (781) 431-1109</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>James Geers<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, December 12, 2008
9:31 AM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] PVAVS System
In Equest - 15,000 hours out side of throttle range</span></font><o:p></o:p></p>
</div>
<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 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am an Architect doing the energy model for a number of two
story schools over 85,000 SF, and using eQuest for LEED energy design and
documentation.<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'>I am doing the energy model for LEED compliance and I am modeling
the base case with a Packaged Rooftop Variable Air Volume System to compare
with my VAV system for the design case. I reverse engineered my design
case to modify the mechanical system, but all of the simulations indicate
I have 15,000 hours outside of the throttle range. My hotwater loop has
two boilers and my heating coils are assigned to the loop, but there does not
seem to be any output from the system. The system report summary
indicates that it is not serving any square footage, so I think there is a bug
somewhere. I have fiddled with the <st1:place w:st="on"><st1:PlaceName w:st="on">THROTTLE</st1:PlaceName>
<st1:PlaceType w:st="on">RANGE</st1:PlaceType></st1:place>, HEAT-CONTROL,
COOL-CONTROL, HEAT-SET-T, and MIN-SUPPLY-T after reading various posts
but nothing changes the lack of heat. I’ve also fiddled with
baseboard heat and pre-heat but nothing seems to affect the hours outside
of throttle range. Does anyone have any suggestions?<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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=4 color=navy face=Tahoma><span style='font-size:13.5pt;font-family:Tahoma;
color:navy'>JG</span></font><b><font face=Tahoma><span style='font-family:Tahoma;
font-weight:bold'><o:p></o:p></span></font></b></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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