WATER SERVICE PROBLEM. An unusual solution was found to a perplexing problem in the water treatment of an air‐conditioning system in Lancaster, Pennsylvania, U.S.A. The system, comprising a 150‐ton compressor‐type comfort cooling system and a 510‐ton Carrier absorption refrigeration unit, installed in offices and plant in June 1955 and June 1956, respectively, is serviced by separate cooling towers. Within three weeks of the 510‐ton unit going into operation, serious operating difficulties, which virtually shut down the air‐conditioning equipment, developed. Water Service Laboratories, who are specialists in water problems, were called in to survey the cooling water problem. Samples of make‐up water from each of the two cooling towers located on the roof of the plant were sent to the laboratories for analysis.
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