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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Thanks Josh, but I
already tried to model a IU unit but i have a different temperature range of
the coils for the main AHU (90/50°C) and the coils of the FC (45/36°C) and I can
not assign to different loops to the IU. So I am still trying.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></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'>Von:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Joshua Wolfe
[mailto:jwolfe@geo-marine.com] <br>
<b><span style='font-weight:bold'>Gesendet:</span></b> Dienstag, 1. September
2009 14:11<br>
<b><span style='font-weight:bold'>An:</span></b> Verena Kindl;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Betreff:</span></b> RE: oa from system</span></font><o:p></o:p></p>
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<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="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Try a system type of
IU, with the induction ratio matching that of the FCs. The main system then
needs to be set to 100% OA with constant cool and heat control set to 68F. You
will have to fake in extra fan power to match that of the FCs. Hope this helps.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><b><font size=3 color="#1f497d" face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial;color:#1F497D;font-weight:bold'>Josh</span></font></b><font
color="#1f497d"><span lang=EN-US style='color:#1F497D'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Verena Kindl<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, September 01, 2009
3:15 AM<br>
<b><span style='font-weight:bold'>To:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] oa from
system<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
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 lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I have a SZRH system
which should provide outside air to the FC system. The air it provides should
always be 68 F. What temperatures shall I put for cooling design and heating
design / thermostat setpoint T. I put min supply temp and max supply temp to 68
F and the other design temperatures to 53/90F cause I do not have a thermostat
there ( the air is always provided with 68 F). Then I specified the OA constant
to 4000 cfm and determined the min outside air ratio =1. Is there sth wrong
with my temperature settings as I do not get any coil loads for the system
(SS-J report)? When I set all temperatures to 68 F the ventilation air I
require is too huge. Do I have to put the min OA ratio to 1, 0 or shall I leave
it blank for the FC system? I mean is it enough to put OA from system SZRH?
Cause someone told me I have to put it to 0 as I do not have any outside air
put I do it is from the system. I am confused. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Thanks for your help.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Verena<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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