In general, a Class A test is one conducted using mercury-in-glass thermometers and grade level psychrometers. SPX Cooling reserves the right to witness any testing where contract compliance is the issue.Ĭurrently, it is common to refer to tests as either Class A or B. If guaranteed performance compliance is to be determined by a test, SPX Cooling will consider other agencies but reserves the right of approval. ![]() Where customers want to use the services of third party agencies to conduct the testing, SPX supports the use of CTI Licensed Agencies. In the case of exceptions to ATC-105 or PTC-23, it is suggested that SPX Cooling Technologies be consulted. ![]() Customers may reserve the right to specify and use modifications to these codes or elect to use another procedure. All discussion of testing assumes that one of these two codes will be followed during the test. A very similar alternative is PTC-23 published by The American Society of Mechanical Engineers. SPX Cooling Technologies supports the use of the thermal test code ATC-105 published by the Cooling Technology Institute (CTI). The information on this page is also provided in downloadable PDFs for printing and reference. This includes site preparation for a thermal performance test. These are the steps necessary to conduct field and certification testing for a cooling tower.
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