Set your snap temperature lower. It should do the trick. See the definition of Snap in the help files below:<br><br><p class="CodeWord">SNAP A control mode where the loop
operation snaps on or off according to a monitored temperature. SNAP has
slightly different meanings depending on the type of loop:</p>
<p class="ListBulletCode" style=""><span style="font-family: 'Courier New';">o </span>For a heating-type loop, this
keyword will cause the loop to activate when a specified temperature sensor is
below the SNAP-T value. An outside-air lockout is another way of thinking of
this control mode; however, the temperature causing the lockout may be either
the outdoor air temperature, or a zone temperature. You specify the location of
the temperature sensor using the SNAP-LOCN and SNAP-ZONE keywords.</p>
<p class="ListBulletCode" style=""><span style="font-family: 'Courier New';">o </span>Cooling-type loops are similar to
heating-type loops, except that the loop will activate when the monitored
temperature is above the SNAP-T value.</p>
<p class="ListBulletCode" style=""><span style="font-family: 'Courier New';">o </span>2-pipe loops will be in the heating
mode below SNAP-T, and in the cooling mode above SNAP-T. In other words, the
SNAP-T is the changeover temperature. Note, however, that a changeover
temperature deadband can be specified using the HEATING-SCH and COOLING-SCH
described under the next code-word.</p>
<p class="ListBulletCode" style=""><span style="font-family: 'Courier New';">o </span>WLHP loops will enable the heating
equipment when below the SNAP-T, and the heat-rejection equipment above the
SNAP-T. In practice, this is a dangerous control mode for WLHP's as the loop may
go to an extreme temperature when either type of primary equipment is
disabled.</p><br><br><div class="gmail_quote">On Tue, Jun 8, 2010 at 4:58 AM, tsea2005 <span dir="ltr"><<a href="mailto:tsea2005@163.com">tsea2005@163.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div style="margin: 10px; font-family: verdana; font-size: 10pt;">
<div><font face="Verdana" size="2"></font> </div>
<div><font face="Verdana" size="2">HI :</font></div>
<div> </div>
<div><font face="Verdana" size="2">How to turn off the hot water loop in the RHFS
? I have choose the loop operation at snap ,and set the snap temp at 120 ,but
the hot water loop still work ,in the report ,there is still have space heating.
How to turn off ?</font></div>
<div align="left"><font color="#c0c0c0" face="Verdana" size="2">2010-06-08
</font></div><font face="Verdana" size="2">
<hr style="width: 122px; min-height: 2px;" align="left" size="2">
<div><font color="#c0c0c0" face="Verdana" size="2"><span>tsea2005</span>
</font></div></font></div>
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