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“We looked at several refrigerants to replace the R-22 that we were using in Weaver Markets’ freezer cases before choosing Genetron Performax LT. Performax LT was the best option because it performs better than R-22 and we didn’t have to do any system modifications, which would have driven up costs, taken more time and disrupted store operations.”
Dwain Weaver, Director of Refrigeration Operations
Triangle Refrigeration
Leola, Pennsylvania
Weaver Markets was having a problem with the low-temperature ice cream freezer case at its Adamstown, Pa., supermarket.
Quality and value have been hallmarks of the family-owned markets for almost 50 years so displaying and selling frozen desserts that weren’t quite frozen was simply unacceptable.
Store manager Mike Weaver called in Dwain Weaver (no relation) and his team from Triangle Refrigeration to have a look. Dwain quickly discovered that the R-22 refrigerant used to cool Weaver’s medium- and low-temperature cases was underperforming.
To keep the cases cooled, the system needed to maintain low suction pressure. This caused the compressors to work harder, overheat, burn oil and break down sooner than they should, driving up energy use and total cost of ownership.
With production of R-22 phasing out anyway, Dwain began looking for replacement refrigerants several years ago. At that time there were no refrigerants that could replace R-22 without requiring costly modifications to the refrigeration system.
In early 2011, Dwain met with Paul Sullivan of the Fluorine
Products business of Honeywell Performance Materials and
Technologies, a leading developer and manufacturer of non-ozone-depleting refrigerants. Honeywell was looking for a supermarket to demonstrate its Genetron ® Performax™ LT refrigerant for Emerson Climate Technologies, which was considering approving Performax LT for use in its Copeland ®
Discus ® compressors.
System Details
The system at Weaver Markets consists of two Tyler refrigeration rack systems connected to a remote air-cooled condenser located outside on the store roof. The medium-temperature rack includes the following
Copeland compressors charged with Emerson Ultra
32-3MAF POE oil:
3DA3-0750-TFC,
3DS3-1500-TFC,
4DA3-2000-TSK,
2DL3-750-TFC.
The low-temperature rack includes the following compressors:
3DB3-0750-TFC,
4DA3-100E-TSK,
4DL3-150E-TSK,
4DL3-150E-TSK,
4DL3-1500E-TSK.
The low-temperature system operates at a -35° F suction temperature and the mediumtemperature system operates at a + 20°F suction temperature.
Three or more of the compressors date back to the original installation date of June 1991.

Dwain immediately thought of Weaver Markets. “Performax LT is a direct replacement for R-22,”
Dwain said. “So we were able to do the complete retrofit in the mechanical room without disrupting store operations, without thermal expansion valve changes or adjustments. All we had to do was change oil and replace filters and seals and we were up and running in about two hours. The whole process was completely invisible to customers and store employees.”
Honeywell conducted a baseline energy consumption test before and after the changeover.
They found energy savings of 10 percent on the medium-temperature case and 15 percent on the low-temperature case. The store reports that the system is performing better than it did with
R-22, maintaining frozen treats at the right temperature to help customers beat the heat during a warmer than normal Pennsylvania summer.
Although the discharge temperature of Performax LT is lower than R22, Dwain was able to retain the liquid injection system, which rarely comes into play on the low temperature compressors during high ambient.
“The workload on the compressors appears to have been reduced, they’re running much cooler and maintenance costs are down because we don’t have to change oil as often,” Dwain added. “We’ve had to make a few minor adjustments and fix some small leaks, which is to be expected. I am looking for opportunities to recommend a Performax LT retrofit to my other supermarket customers.”
As a result of the successful retrofit project, Emerson approved Performax LT as a retrofit solution for supermarkets and single/multi-compressor refrigeration solutions with its Copeland
Discus compressors with R-22.
Performax LT refrigerant is specifically designed to replace R-22 in new and existing supermarket refrigeration systems. It provides similar performance to R-22, but requires fewer equipment modifications, has lower global warming potential (GWP), and offers improved capacity and efficiency versus most popular low- and medium-temperature refrigerants. For more information visit www.genetronperformaxlt.com
or contact Paul Sullivan at paul.sullivan@honeywell.com
.
To learn more about Weaver Markets, visit www.weavermarkets.com
.
To learn more about Triangle Refrigeration, visit www.trianglerefrigeration.com
.
Honeywell Genetron Refrigerants
101 Columbia Road
Morristown, NJ 07962-1053
Phone: 1-800-631-8138 www.genetronperformaxlt.com
G525-606
Genetron is registered trademark of Honeywell International Inc.
Performax is a trademark of Honeywell International Inc.
Copeland and Discus are registered trademarks of Emerson Climate
Technologies
© 2013 Honeywell International Inc. All rights reserved.