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<div style="direction: ltr;">Also, for log keeping, we left the cooling system with all valves closed, compressor 1’s e-stop button pressed, and compressor 1 powered.
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<div style="direction: ltr;">Tyler</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Thursday, October 10, 2019 1:30:06 PM<br>
<b>To:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it>; Bob Miller <rmiller@jlab.org>; Calvin Mealer <mealer@jlab.org><br>
<b>Cc:</b> dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: [Dsg-rich] [EXTERNAL] Re: RICH compressor after maintenance</font>
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<div style="direction: ltr;">
<div style="direction: ltr;">Hi Bob, Calvin, and Marco,</div>
<div><br>
</div>
<div style="direction: ltr;">RICH compressor 2 worked fine over night so we switched back to compressor 1 this morning. </div>
<div><br>
</div>
<div style="direction: ltr;">We saw that the pressure wasn’t being maintained in the buffer tank with compressor 1. </div>
<div><br>
</div>
<div style="direction: ltr;">Aaron, Pablo, and I went down to shut off all compressors as requested , but before doing so, wanted to do one last test to see if the compressor could get just the buffer tank (with flow to RICH stopped) up to the pressure where
the compressor shuts itself off. </div>
<div><br>
</div>
<div style="direction: ltr;">When the compressor got up to ~106 psi according to its display screen, we heard a squealing sound come from inside the compressor so we hit its emergency stop button to shut it off. </div>
<div><br>
</div>
<div style="direction: ltr;">Compressor 1’s inability to keep pressure in the buffer tank combined with that squealing sound to me definitely points to something wrong with the compressor. </div>
<div><br>
</div>
<div style="direction: ltr;">We’re not sure where to go from here with Compressor 1, if there is something we can do at JLab or if we’d have to call Atlas Copco. </div>
<div><br>
</div>
<div style="direction: ltr;">Best regards, </div>
<div style="direction: ltr;">Tyler</div>
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<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Thursday, October 10, 2019 12:52:00 PM<br>
<b>To:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Cc:</b> dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: [Dsg-rich] [EXTERNAL] Re: RICH compressor after maintenance</font>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hello, <br>
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It seems like there are still issues with Compressor 1. It is not behaving the same as Compressor 2 (see attached plot).</div>
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When we go turn it off shortly, we'll see if there is anything obvious (like another leak) causing the pressure to not be maintained.</div>
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Best regards,</div>
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Tyler<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Thursday, October 10, 2019 10:39 AM<br>
<b>To:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Cc:</b> dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: [Dsg-rich] [EXTERNAL] Re: RICH compressor after maintenance</font>
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Hi Marco,</div>
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We've swapped to Compressor 1 now and we'll let it run for a few hours and then turn it off to prevent humidity from rising further.</div>
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Tyler<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Sent:</b> Thursday, October 10, 2019 9:38 AM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Cc:</b> dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: [EXTERNAL] Re: [Dsg-rich] RICH compressor after maintenance</font>
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<div class="x_PlainText">Perfect, thank you.<br>
Marco<br>
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Il 2019-10-10 15:18 Tyler Lemon ha scritto:<br>
> Hi Marco Mirazita,<br>
> <br>
> We'll plan to go swap power to the compressors again this morning to<br>
> see how Compressor 1 behaves.<br>
> <br>
> If everything looks good, we'll then plan to turn off the cooling<br>
> system this afternoon to avoid any further increase in humidity.<br>
> <br>
> Also, Monday October 14 at 9:00 AM would be good for a bluejeans<br>
> meeting with us.<br>
> <br>
> Best regards,<br>
> Tyler<br>
> <br>
> -------------------------<br>
> <br>
> FROM: Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
> SENT: Thursday, October 10, 2019 5:57 AM<br>
> TO: Tyler Lemon <tlemon@jlab.org><br>
> CC: dsg-rich <dsg-rich@jlab.org><br>
> SUBJECT: [EXTERNAL] Re: [Dsg-rich] RICH compressor after maintenance<br>
> <br>
> Hi Tyler,<br>
> I would like to have a meeting with you and the DSG to start planning<br>
> <br>
> the tests to optimize the cooling system parameters.<br>
> I suggest we meet next Monday, October 14, at 9 am JLab time. Please<br>
> let<br>
> me know if this is ok for you, then I will set up the bluejeans<br>
> connection.<br>
> Best regards,<br>
> Marco<br>
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