<div dir="ltr">We've had to back-flush several of ours because of poor water quality causing blockage issues, but never had to do repairs because of leaks. However, we do have a periodic leak in a steam coil for our main AHU. Facilities management staff repair it by soldering or torch brazing to repair the leak.<div><br></div><div>Thanks,</div><div><br></div><div>Brian<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Brian K. Olmsted<br></div><div>Associate Director of Laboratory Operations<br><div>University of Minnesota | MNC<br><div><a href="http://cse.umn.edu/mnc" style="color:rgb(17,85,204)" target="_blank">cse.umn.edu/mnc</a><br></div></div><div>612.626.3287</div><div><a href="mailto:olms0025@umn.edu" target="_blank">olms0025@umn.edu</a></div><div><br></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jan 4, 2023 at 2:50 PM Mark Weiler <<a href="mailto:mweiler@andrew.cmu.edu">mweiler@andrew.cmu.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello Everyone…<br>
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I am writing to ask whether any of you have ever had to replace a steam coil of the Make-up Air Units (MAU’s) of your cleanrooms, and what you, your facilities team, or the product vendor did to solve the problem. Are there any cost-effective solutions with minimal downtime? We have completed three repairs of our coil since starting here in 2016…(replacing likely requires a Cleanroom shutdown and the construction of a bypass), and currently have another leak.<br>
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I’m really interested to know if this has happened anywhere else… are we an outlier?<br>
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Best regards,<br>
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Mark<br>
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Mark Weiler<br>
Manager, Equipment & Facilities<br>
Bertucci Nanotechnology Laboratory<br>
Eden Hall Nanofabrication Cleanroom<br>
Carnegie Mellon University<br>
P: 412-268-2471<br>
F: 412-268-3497<br>
<a href="http://www.nanofab.ece.cmu.edu" rel="noreferrer" target="_blank">http://www.nanofab.ece.cmu.edu</a><br>
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