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<p class="MsoNormal"><i>Are both on the same supply branch? One needs to be set as automatic and the other in manual mode. My guess being(just had this issue with a new 100hp compressor last week) one compressor is in automatic mode at a low pressure setting,
the other (our backup) was set at 5 psi higher but in manual, the lead(100hp) satisfied and shut down, the backup seeing a lower than set pressure reading turned on and satisfied pressure, The 100hp never turned back on. I could a situation where the lag and
the Lead have conflicting parameters, the lag shuts down satisfied(not auto restart setup) and the lead satisfied and does the same.<o:p></o:p></i></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal"><i>Check the simple items first. Settings and PRV’s dwell. I would call IR customer service to see if they cam marry the unit’s PLC’s to simplify programming.
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="color:#002060;text-transform:uppercase">Deon D. Collins<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:#002060;text-transform:uppercase"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="color:#002060"><br>
<i>Director of Facilities<o:p></o:p></i></span></p>
<p class="MsoNormal"><i><span style="color:#002060">The Grainger College Of Engineering UIUC</span></i><span style="color:#002060"><br>
</span><span style="color:#002060">Holonyak Micro & Nanotechnology Lab</span><span style="color:#1F497D"><br>
</span><span style="color:#13294B">208 N Wright St Rm. 1114 | MC-249</span><span style="color:#1F497D"><br>
</span><span style="color:#13294B">Urbana, IL 61801</span><span style="color:#1F497D"><br>
</span><span style="color:#13294B">217-300-7531 | </span><span style="color:#1F497D"><a href="mailto:deonc69@illinois.edu"><span style="color:#0563C1">deonc69@illinois.edu</span></a><br>
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</span><a href="http://illinois.edu/"><span style="color:#1F497D;text-decoration:none"><img border="0" width="119" height="21" style="width:1.2395in;height:.2187in" id="Picture_x0020_1" src="cid:image001.png@01DAC15D.E7BF3C80"></span></a><span style="color:#1F497D"><br>
<br>
</span><i><span style="color:#666666">Under the Illinois Freedom of Information Act any written communication to or from university employees regarding university business is a public record and may be subject to public disclosure.
</span></i><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="color:#1F497D"><o:p><span style="text-decoration:none"> </span></o:p></span></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#A3238B">Life begins at the end of your comfort zone.
<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#A3238B"> Propeck Amanda<o:p></o:p></span></b></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Johnson, Michael W <mjohnso6@tulane.edu> <br>
<b>Sent:</b> Monday, June 17, 2024 5:40 PM<br>
<b>To:</b> Collins, Deon <deonc69@illinois.edu>; Fab Network <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Power monitoring<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:inherit">It's a somewhat new Ingersol Rand RS30i rotary screw compressor. Actually two of them and they’re both shutting down. They are set to maintain pressure between 110 and 125 PSIG. They should not be turning
off to save power. We have a lot of stuff that has demand even when there are no people doing things.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit">If it’s not a power issue, I’ll be very interested to see what else it could be. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit">They don’t use external cooling water. It’s unlikely to be an ambient temperature problem.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit">We’ll see.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:inherit">-Michael.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Collins, Deon <<a href="mailto:deonc69@illinois.edu">deonc69@illinois.edu</a>><br>
<b>Sent:</b> Monday, June 17, 2024 5:26 PM<br>
<b>To:</b> Johnson, Michael W <<a href="mailto:mjohnso6@tulane.edu">mjohnso6@tulane.edu</a>>; Fab Network <<a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>><br>
<b>Subject:</b> RE: [labnetwork] Power monitoring</span> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<span style="color:black">External Sender. Be aware of links, attachments and requests.
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<p class="xmsonormal">The electricians through the university should have a simple data logger they can attach to the incoming 3 phase power. It’s would seem odd to me that it is occurring on Saturday if it’s a consumption issue. I would lean towards the unit
seeing less load, therefore the system is satisfied and shutting down for energy conservation.
<o:p></o:p></p>
<p class="xmsonormal"> <o:p></o:p></p>
<p class="xmsonormal">Is this unit a simple recip tank mounted compressor, an older screw compressor or a new plc/vfd driven screw compressor?
<o:p></o:p></p>
<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal"><b><span style="color:#002060;text-transform:uppercase">Deon D. Collins</span></b><o:p></o:p></p>
<p class="xmsonormal"><b><span style="color:#002060;text-transform:uppercase"> </span></b><o:p></o:p></p>
<p class="xmsonormal"><span style="color:#002060"><br>
<i>Director of Facilities</i></span><o:p></o:p></p>
<p class="xmsonormal"><i><span style="color:#002060">The Grainger College Of Engineering UIUC</span></i><span style="color:#002060"><br>
Holonyak Micro & Nanotechnology Lab</span><span style="color:#1F497D"><br>
</span><span style="color:#13294B">208 N Wright St Rm. 1114 | MC-249</span><span style="color:#1F497D"><br>
</span><span style="color:#13294B">Urbana, IL 61801</span><span style="color:#1F497D"><br>
</span><span style="color:#13294B">217-300-7531 | </span><span style="color:#1F497D"><a href="mailto:deonc69@illinois.edu"><span style="color:#0563C1">deonc69@illinois.edu</span></a><br>
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</span><a href="http://illinois.edu/"><span style="color:#1F497D;text-decoration:none"><img border="0" width="119" height="21" style="width:1.2395in;height:.2187in" id="x_Picture_x0020_1" src="cid:image001.png@01DAC15D.E7BF3C80"></span></a><span style="color:#1F497D"><br>
<br>
</span><i><span style="color:#666666">Under the Illinois Freedom of Information Act any written communication to or from university employees regarding university business is a public record and may be subject to public disclosure.
</span></i><o:p></o:p></p>
<p class="xmsonormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="xmsonormal"><b><span style="font-size:10.0pt;color:#A3238B">Life begins at the end of your comfort zone.
</span></b><o:p></o:p></p>
<p class="xmsonormal"><b><span style="font-size:10.0pt;color:#A3238B"> Propeck Amanda</span></b><o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal"><b>From:</b> labnetwork <<a href="mailto:labnetwork-bounces@mtl.mit.edu">labnetwork-bounces@mtl.mit.edu</a>>
<b>On Behalf Of </b>Johnson, Michael W<br>
<b>Sent:</b> Monday, June 17, 2024 9:29 AM<br>
<b>To:</b> Fab Network <<a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>><br>
<b>Subject:</b> [labnetwork] Power monitoring<o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal">Hello folks,<o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal">We have a problem with a large compressor in a building that keeps shutting down at almost the same time on weekends. I feel like the problem may be some regular anomaly with the three phase power feeding it.<o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal">Can somebody recommend a simple product or method to record the power characteristics so we can go back and review the recorded data to see what, if anything, is going on? We have NMR's and other instruments that record when the compressed
air is lost. It would be very helpful to then review recorded sine wave or other useful information to determine if we have a power problem or if the issue is actually something else. <o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal">It really feels like a regular voltage loss that only happens on Saturday afternoons when not much is going on in the building. This is causing a lot of problems.<o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal">Appreciate any help with this.<o:p></o:p></p>
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<p class="xmsonormal"> <o:p></o:p></p>
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<p class="xmsonormal">-Michael.<o:p></o:p></p>
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