Retrofit Calls For Temporary Condensing Solution

April 1, 2004
/ Print / Reprints /
/ Text Size+
Taking a cooling system off-line for a repair or retrofit is not that big of a deal when it involves a residence where the homeowner can simply open a window for some natural cooling while the work is being done.

But what do you do when the retrofit involves a 600-ton condensing unit that provides cooling for a large manufacturing facility? You turn to a temporary condensing unit trucked to the site.

Officials at PPG, a manufacturer of coatings, sealants, adhesives, and fiberglass, decided to retrofit a system at a West Virginia facility from R-12 to R-134a. The company's condensing unit, which operates at –10°F, is used as part of the process that produces chlorine for industrial and commercial use.

Company officials called on NuTemp Chicago's Industrial Engineering Group to design and build a temporary 1,000-hp condensing unit. The designing and fabricating took four months while field workers prepared the site for installation.

It took two weeks to install and start up the unit. The plant's existing evaporator was kept on line, so the temporary condensing was installed in parallel with the existing system and run simultaneously for a week. Then full capacity was shifted to the temporary unit.

The temporary condenser was required to operate independently, although it was completely intertwined with the permanent system. According to NuTemp officials, "Specific functions of the permanent equipment and certain site requirements meant that a very special design had to be implemented in order for the two systems to work together. The equipment ran on 2,200V site power, and used cold river water during winter operations of condenser cooling, operated 24 hours a day, and held loads between 0 and 100 percent."

Officials noted a challenge of running two condensing units using the same evaporator. Further, they said, the temporary unit had to run from a remote location while still managing system oil and refrigerant. Both challenges were met by a microprocessor control located on the temporary condensing unit's skid.

The temporary setup operated for two months while the refrigerant changeover was made. Representatives of the manufacturing facility said production was normal.

NuTemp's application engineer, Fred Landis, said, "NuTemp isn't your typical rental chiller company. We not only provide standard equipment for nominal commercial and industrial applications, but we take pride in having the ability to offer custom industrial solutions."

For information, contact

Publication date: 04/05/2004

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

Recent Articles by Peter Powell

You must login or register in order to post a comment.



Image Galleries

2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.


NEWSMakers: Jeremy Begley

Jeremy Begley, home-performance specialist and Web and social media manager with National Heating and Air Conditioning Co. in Cincinnati discusses how and why you should add home-performance philosophies to your contracting repertoire. Posted on Sept. 12.

More Podcasts


NEWS 09-15-14 cover

2014 September 15

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Venting R-22

The NEWS reported that a man received prison time for venting R-22. Should EPA step up enforcement?
View Results Poll Archive


2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con