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    Richard,<br>
      The active layer model does handle no-flow. The air temperature
    may not be the best variable to watch to determine whether the
    system is operating properly; radiant floor systems often try to
    keep people comfortable by keeping the zone surfaces either cool or
    warm and letting the air temperature float through a wider range
    than is generally acceptable in purely air-based systems. You might
    look instead at the inside surface temperature of your radiant slab.
    I would think that you would see a slower response to turning the
    GSHP on and off there.<br>
    Best,<br>
     David<br>
    <br>
    <br>
    On 5/15/2012 01:48, Richard Thygesen wrote:
    <blockquote
cite="mid:63D6870D443E63419AC4A0C97B86C0920D5BEBED1D@MBXCLUSTER.mdh.local"
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        <p class="MsoNormal"><span lang="EN-US">Hi.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Have any of you out
            there had problem with controlling an active layer in type
            56? <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">I have connected  the
            active layer to a GSHP system but the indoor temperature
            rise sharply when the controller turns the GSHP off and
            return to a “normal” 20°C when the GSHP starts again. Is the
            active layer incapable of handle a no flow situation?<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">Does anyone know what
            the problem might be?<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">Best regards<o:p></o:p></span></p>
        <p class="MsoNormal"><b><span
style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-language:SV"
              lang="EN-US">Richard Thygesen<o:p></o:p></span></b></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"
            lang="EN-US">Doctoral student<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><b><span
style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-language:SV"
              lang="EN-US">Mälardalen University<o:p></o:p></span></b></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"
            lang="EN-US">School of Sustainable Development of Society
            and Technology<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"
            lang="EN-US">Phone: +46(0)21-10 31 82<o:p></o:p></span></p>
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                moz-do-not-send="true"
                href="mailto:richard.thygesen@mdh.se"><span
                  style="color:blue" lang="EN-US">richard.thygesen@mdh.se</span></a></span></u><span
style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"
            lang="EN-US"><o:p></o:p></span></p>
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style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"><a
              moz-do-not-send="true" href="http://www.mdh.se/"><span
                style="color:blue" lang="EN-US">www.mdh.se</span></a></span><span
style="font-size:9.0pt;font-family:"Georgia","serif";mso-fareast-language:SV"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-family:"ITC Avant
            Garde Pro Bk";mso-fareast-language:SV" lang="EN-US"><o:p> </o:p></span></p>
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                src="cid:part3.08020700.02010503@tess-inc.com"
                alt="Beskrivning: Beskrivning: mälardalens högskola"
                border="0" height="28" width="174"></span></b><span
            style="mso-fareast-language:SV"><o:p></o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
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      <pre wrap="">_______________________________________________
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    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

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