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<p>Jim,</p>
<p> The quick fix is that you can set the units of the fraction of
outside air to "variable name" (or "string" if you're using v17)
and then define and use an equation that sets the fraction of
outside air rather than keying in a value.</p>
<p> The more rigorous fix is the following: <br>
</p>
<p>- open the Type919 proforma from within the Simulation Studio.</p>
<p>- switch to the "variables" tab, click on the "variables" button
and then filter on "inputs"</p>
<p>- find the "fraction of outside air" input and click the "modify"
button.</p>
<p>- make sure that the "type" field is set to "real" and not
"integer"</p>
<p>- save the change in the proforma, close it and then drag a new
one out into your project. Check to make sure that you can set the
value to anything between 0 and 1</p>
<p>Once you have verified that the fix works, you'll need to right
click on the instance(s) of Type919 in your project and select
"replace" from the context menu.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 09/16/2021 10:03, dimitris soukoulis
via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:VI1PR08MB350337602CDA6364F9EF878EA7DC9@VI1PR08MB3503.eurprd08.prod.outlook.com">
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<p class="MsoNormal"><span lang="EN-US">Dear All,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">While trying to change
the input #20: Fraction of outside air, from the type919
Water source heat pump, I realized that the only possible
values it accepts are 0 and 1. Everything in between will
not work. Is there a simple fix for that problem, or is it a
coding problem?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jim Soukoulis<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">NTUA <o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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