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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Verena,<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If we’re looking at the same thing, I think the system schematic
view might be hard-coded to say “2-pipe coil”.  Regardless, it should behave as
a 4-pipe IU if you create separate HW and CHW loops and assign both to the IU. 
If you’re using v3.63, immediately below the 2-pipe label it shows separate
heating and cooling coils as expected for a 4-pipe system.  The two loops will
operate independently to maintain space temperatures.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>To verify, you can compare your set up to the example template
for a 4-pipe system:<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>        
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Search for “Four-Pipe” in Help<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>        
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Choose the search result “SYSTEM Type = IU”<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>        
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>On the right side of the window, scroll down to the bottom of
the help content and you’ll see a link labeled “Input template for a standard
2- and 4-pipe IU unit”.  <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You’ll note that a 2-pipe IU would require a single loop created
specifically as TYPE = PIPE-2.  The same loop would then be designated as the
IU’s cooling and heating loop.  It is my understanding that creating two
separate heating and cooling loops, without specifying them as 2-PIPE, and
assigning both to your IU makes it a 4-pipe.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks,<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black;text-transform:uppercase'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>                                <o:p></o:p></span></p>

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style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>                        DAKOTA KELLEY</span></b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>              </span><span style='font-size:8.0pt;font-family:
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style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><o:p></o:p></span></b></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>                                </span><span style='font-size:
10.0pt;font-family:"Franklin Gothic Book","sans-serif";color:black'>Project
Designer<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>                                Office:      214-744-6199<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>                                Cell:         214-280-3825<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'>                                Fax:         214-744-0770 <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
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<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><a href="http://www.teliospc.com/"><span style='font-family:"Times New Roman","serif"'>http://www.teliospc.com</span></a> 
        3535 Travis St. Suite 115 <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><a href="mailto:dakotak@teliospc.com"><span style='font-family:
"Times New Roman","serif"'>dakotak@teliospc.com</span></a>             Dallas,
TX 75204 <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#3333FF'><o:p> </o:p></span></p>

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<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"'> Verena Kindl
[mailto:kindl@scholze.de] <br>
<b>Sent:</b> Friday, August 14, 2009 3:07 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] 4-pipe IU<o:p></o:p></span></p>

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<p class=MsoNormal><o:p> </o:p></p>

<p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi,<o:p></o:p></span></p>

<p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>i
finally model my system as an induction unit with a 4 pipe coil. As it is not
possible in the wizard I do it in the detailed edit. But even I choose for the
loop always the CHW / HW and not the 2 pipe option I always see a 2 pipe coil
on the screen. How can I activate the 4 pipe coil ? <o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks
Verena<o:p></o:p></span></p>

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