Kaltra supplied replacement coils for large chiller installation in Florida, USA
Florida is a high-corrosivity region due to several factors, mainly due to marine atmosphere with high airborne salinity, and falls into the range provided for an ISO C3 category classification and even C4 for coastal areas. For C3 category environments, aluminum coils like microchannel heat exchangers without protective coating are unsuitable but are often used because of their low cost compared to coils with electrophoretic epoxy-coated ones. Traditional uncoated copper-aluminum coils demonstrate even worse corrosion resistance in C3/C4 regions.
E-coating and UV-resistant topcoat significantly increase service life of heat exchangers: latest tests on Kaltra heat exchangers (as per ASTM G85 – SWAAT) showed 1850 hours without performance degradation/leakages for uncoated MCHE with HA9153A alloy tubes, while the same MCHE with applied e-coating performed without issues for 4000 hours (test was stopped at this milestone).
As a replacement for original coils that exhibit multiple leakages and performance degradation after about 4 years of service, Kaltra offered the most corrosion-protected microchannel condensers made from high-manganese HA9153A aluminum alloy with e-coating and UV protection. Condenser coils were replaced on 16 York YVAA series chillers, 256 coils in total. The standard warranty provided was 5 years.
Installation works, refrigerant recharging and commissioning were completed by Kaltra’s regional partner, who will also perform routine maintenance.
Headquartered in Germany and Austria, Kaltra designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillers, precision air conditioners, IT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensers, dry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminium coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.
For more information on Kaltra and its products call +49 (0) 911 253 421 07 or visit www.kaltra.com
