ACtion Magazine - May 2014 - (Page 21)
Giving the compressor more of a ﬁghting chance
In the January/February 2014 issue of MACS ACtion Magazine,
there was a compressor installation article (cover story) titled "Giving
the new compressor a ﬁghting chance," which described what it takes
to reduce the high failure and return rate of replacement compressors.
The compressor supplier recommendations described in that article almost mirror the OE installation procedures, and wisdom from the ﬁeld
described proper practice issues such as ﬁt, torque, belts, tensioners,
ﬂushing, charge pressures, leaks, and more.
Looks like we have got it all covered; so why do replacement compressors continue to fail? Many of you would answer this question with
opinions about product quality, country of origin, installation procedures,
factory service procedures, training, tooling, etc. While I can agree that
many of these reasons are valid at times, they are not the root cause.
From my perspective (and I'm not alone in this observation), the root
cause is the failure to completely and properly clean and/or return the
system to like-new condition. We need to look more closely at the fact that
a failed compressor contaminates a system with used oils of unknown
quality and quantity, potential additive cocktails and a high probability
of metal shards and debris. Doing nothing more than "pooﬁng" some
solvent at it and installing new parts is not enough. We must face the facts
and accept the responsibility of properly preparing the system for a new
compressor, or replacement compressors will continue to fail.
The compressor manufacturers understand contamination; they do
forced-failure tests and then effectively ﬂush and clean their test stands
between tests. Regardless of brand or country of origin, each manufac-
turer tests and measures the quality of their product, and they would
never release a faulty product into the market. They see repeat failures
as an installation issue, and many have made ﬂushing a condition of their
warranty "using approved ﬂushing products and procedures."
The methods they "approve" just mirror the OE procedures that require only the low-ﬂow, closed-loop ﬂush available in the RRR machine
that OEs require their dealership service departments to have in their
shops. Many require using refrigerant only and warn against the use of
solvents. Why? Because this satisﬁes the OE's warranty, reduces their
environmental liabilities and shifts almost all of the responsibility and associated costs to you, the Professional Installer.
But is it enough? Don't you already go beyond minimum warranty
requirements for other repairs when you know it decreases the chances
of a repeat failure which is ultimately your responsibility?
Superior, proven and validated cleaning methods exist and they are
used every day in Automotive, Fleet, Aviation, and Industrial applications to clean multi path and micro channel heat exchangers. "You can't
ﬂush those" is a myth. Other than replacing every component in the system, complete and effective enhanced-energy ﬂushing is the only way
to achieve the goal of returning a system to like-new conditions. Going
beyond minimum warranty requirements is a step that always pays for
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Copyright 2014 DuPont. All rights reserved. The DuPont Oval Logo, DuPontTM and Opteon YF are registered trademarks
or trademarks of E. I. du Pont de Nemours and Company or its affiliates. K-28356 (04/14)
May 2014 * ACtion
Table of Contents for the Digital Edition of ACtion Magazine - May 2014
Selling the right things
By the Numbers
Letter to the editor
ACtion Magazine - May 2014