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Title: Detection Of Cracked Heat Exchangers On Warm Air Furnaces
Author: James F. Wunderlin
Source: American Gas Association 1979
Year Published: 1979
Abstract: Most methods used to detect holes or cracks in the heal exchangers of warm air furnaces are either unreliable or have undesirable side effects associated with the tesi such as corrosion, smoke, or odors. This paper will describe a method of delecting discontinuities in heat exchangers of warm air furnaces that is generally more reliable and eliminates the undesirable side effects of other tests. The following paper will be presented as follows: 1. Describe Ihe characteristics of the various types of furnace heat exchangers. 2. Indicate effects of discontinuities in heal exchangers. 3. Summarize laboratory tests performed to develop sodium carbonate lest. 4. Sodium carbonate lest procedure. 5. Summary of actual field experience using sodium carbonate test.

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