<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Safwan,<br>
I am not sure I understand your problem statement. Is your
monitored temperature always 26C, your cooling set point 20.5C and
the deadband 0.5 and yet the controller is turning on and off? If
that is the case then you should send your project file (*.tpf) and
any other files needed to run the project to your distributor for
debugging. <br>
If the temperature you are monitoring is holding between 20C and
21C then the controller appears to be functioning properly.<br>
regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/16/2014 20:17, Safwan Kanan
wrote:<br>
</div>
<blockquote
cite="mid:896804639.32356.1418782647779.JavaMail.yahoo@jws106118.mail.bf1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica
Neue, Helvetica, Arial, Lucida Grande,
sans-serif;font-size:24px">
<div dir="ltr" id="yui_3_16_0_1_1418741229578_131835">Dear All,</div>
<div id="yui_3_16_0_1_1418741229578_131891" dir="ltr">I am
simulating solar cooling absorption chiller and I am using
type 108 on/off thermostat to control room temperature with
all pumps ,fans ..etc.</div>
<div id="yui_3_16_0_1_1418741229578_132144" dir="ltr">with this
information:</div>
<div id="yui_3_16_0_1_1418741229578_131893" dir="ltr">monitoring
temp=26 C</div>
<div id="yui_3_16_0_1_1418741229578_132146" dir="ltr">1st stage
cooling set point=20.5 C</div>
<div id="yui_3_16_0_1_1418741229578_132166" dir="ltr">2nd stage
=35C</div>
<div id="yui_3_16_0_1_1418741229578_132167" dir="ltr">No heat.</div>
<div id="yui_3_16_0_1_1418741229578_132168" dir="ltr">dead band
=0.5 C</div>
<div id="yui_3_16_0_1_1418741229578_132169" dir="ltr">I got most
of the time on and off for all system types controlled.</div>
<div id="yui_3_16_0_1_1418741229578_133227" dir="ltr">for
example on for 5 min then off 10 min and on 5 min.as shown in
attached photo.<br>
</div>
<div id="yui_3_16_0_1_1418741229578_132617" dir="ltr">any idea
to solve this issue please?</div>
<div id="yui_3_16_0_1_1418741229578_132619" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1418741229578_132620" dir="ltr">Regards,</div>
<div id="yui_3_16_0_1_1418741229578_132621" dir="ltr"><br>
</div>
<div id="yui_3_16_0_1_1418741229578_132622" dir="ltr">Safwan
Kanan</div>
<div id="yui_3_16_0_1_1418741229578_132623" dir="ltr">Manchester
University <br>
</div>
<div id="yui_3_16_0_1_1418741229578_132624" dir="ltr">Manchester</div>
<div id="yui_3_16_0_1_1418741229578_132625" dir="ltr">M13 9PL</div>
<div id="yui_3_16_0_1_1418741229578_132627" dir="ltr">UK<br>
</div>
<div id="yui_3_16_0_1_1418741229578_131894" dir="ltr"><br>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
</pre>
</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
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
</body>
</html>