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<p class="MsoNormal">Hi Sam,<o:p></o:p></p>
<p class="MsoNormal">I’m not sure but I don’t think you can apply a default expression to any TYPE keyword – whether it’s for a DW-heater, a SYSTEM, a SCHEDULE etc.<o:p></o:p></p>
<p class="MsoNormal">One alternative is to create multiple DHW heaters, and modify the default expression for CAPACITY to vary with the value of #PA(“DHW_Type”), so that the types you don’t want to use have a .001 capacity.<o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
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<p class="MsoNormal"><b><i><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#002060">T: (585) 698-1956</span></i></b><b><i><span style="color:#002060">
</span></i></b><span style="color:#1F497D"> </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005</span><b><span style="font-size:3.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></b></p>
<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">bbishop@pathfinder-ea.com</span></a><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> </span><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">www.pathfinder-ea.com</span></a><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608
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</span><i><span style="font-size:7.0pt;font-family:"Verdana",sans-serif;color:#00B0F0">Ask me why Carbon Fee & Dividend may be right for you.</span></i><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>samuel mason via Equest-users<br>
<b>Sent:</b> Tuesday, October 20, 2020 10:53 PM<br>
<b>To:</b> Equest Users Mailing List <Equest-users@lists.onebuilding.org><br>
<b>Subject:</b> [Equest-users] User Expression for DHW heater type<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello,<o:p></o:p></p>
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<p class="MsoNormal">I am trying to set up a user expression for the type of DHW heater in a project. When I use the symbolic index control shown below and add it directly into the equest interface, the model runs fine and the graphical interface shows the
correct heater type.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">However, when I save the model, the INP file does not get written with the #SI notation and when I reload the model, it crashes while loading the BDL right when it gets to the DW-heater. Does anyone know how to get around this?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Snippet:<o:p></o:p></p>
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<div>
<p class="MsoNormal">TYPE = <o:p></o:p></p>
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<p class="MsoNormal">{IF(#PA("DHW_Type")==1) THEN<br>
#SI("GAS","DW-HEATER","TYPE")<br>
ELSE IF (#PA("DHW_Type")==2) THEN<br>
#SI("ELEC","DW-HEATER","TYPE")<br>
ELSE IF(#PA("DHW_Type")==3) THEN<br>
#SI("HEAT-PUMP","DW-HEATER","TYPE")<br>
ELSE<br>
#SI("GAS","DW-HEATER","TYPE")<br>
ENDIF<br>
ENDIF<br>
ENDIF}<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">DHW_Type is a global parameter of type numeric.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I also tried putting this code into the default for the DW-heater with a user expression and this also crashes when trying to load the BDL.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thank you in advance.<o:p></o:p></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Sam<o:p></o:p></p>
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<p class="MsoNormal"><br>
<b><span style="font-family:"Tahoma",sans-serif"><br>
Sam Mason</span></b><span style="font-family:"Tahoma",sans-serif"> P.E., LEED AP BD+C, BEMP</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">Principal</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-family:"Tahoma",sans-serif">Encompass Energy, LLC</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">P: 443-410-1534</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">E: <a href="mailto:sam.mason@encompassenergyLLC.com">
sam.mason@encompassenergyLLC.com</a></span><o:p></o:p></p>
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<p class="MsoNormal">W: <a href="http://www.encompassenergyLLC.com" target="_blank">
www.encompassenergyLLC.com</a><o:p></o:p></p>
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