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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">For CHW/HW the way I interpret the code is the cooling control valve cannot start to open to coil until at least 5F above the temperature at which the heating control valve
starts to open to coil.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">eQuest has a throttling range, so if you put a 75F cooling setpoint and a 70F heating setpoint the deadband will be less than 5F based on the throttling range input.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">For example an input of 2R throttling range in eQuest, then one would need to use 77F for cooling setpoint and 70F for heating setpoint. Cooling would shut off completely at
76F and heating would shut off completely at 71F to achieve a 5F deadband.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Josh</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>John Aulbach via Equest-users<br>
<b>Sent:</b> Wednesday, September 19, 2018 10:57 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org; equest user <equestuser00@gmail.com><br>
<b>Subject:</b> Re: [Equest-users] temperature dead band query<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif">I will give this a crack, as it has been some time since i dealt with this. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif">The temperature deadback will be a 5 DegF band between heating and cooling. So your cooling t'stat setting in eQuest day schedule will be, say 75 DegF and heating t'stat at 70 DegF. Between
those temps, no cooling or heating should take place.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif">Group, it isn't any more complicated than that, correct?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif">John<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">On Wednesday, September 19, 2018, 2:42:12 AM PDT, equest user via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>>
wrote: <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
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<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">Hi all Modelers,</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">I am having a hard time understanding the below statement mentioned in my country's local guidelines. I assume it is pertaining
to 4 pipe AHUs which goes as follows:</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><i><span style="font-family:"Calibri",sans-serif;color:#17375E">“All heating and cooling systems shall be temperature controlled. Where a unit provides both heating and cooling, controls
shall be capable of providing a </span></i><i><span style="font-family:"Calibri",sans-serif;color:red">temperature dead band
</span></i><i><span style="font-family:"Calibri",sans-serif;color:#17375E">of 3 degree Celsius (5 degree Fahrenheit) within which the supply of heating and cooling energy to the zone is shutoff or reduced to a minimum."</span></i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
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<span style="font-family:"Calibri",sans-serif;color:#17375E"> </span><span style="font-size:11.0pt;line-height:115%;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">Can anyone help me what exactly the guideline is referring to as “temperature dead band” and how can I verify it with my
installed system <i>(is it mentioned in AHU datasheets?).</i> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">My system is a 4 pipe units which provides cooling in summer and heating in winter season.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">Eagerly waiting for your suggestions.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">Thanks,</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
<p class="yiv2517585412msonormal" style="margin:0in;margin-bottom:.0001pt"><span style="font-family:"Calibri",sans-serif;color:#17375E">Tejas</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#26282A"><o:p></o:p></span></p>
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