Sporlan – Using a T-P chart as a troubleshooting tool

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RESOLUTION
Manufacturers of refrigerants, controls, and other suppliers distribute hundreds of thousands of pressure-temperature charts to the trade every year. It would be rare indeed to find a service technician who could not put their hands on a pressure-temperature card at a minute�s notice.

In spite of the widespread availability and apparent reference to the pressure-temperature relationship,
very few service technicians use the P-T chart properly in diagnosing service problems.

The purpose of this article is to not only demonstrate the proper use of the pressure-temperature relationship, but to also illustrate how it can be used to thoroughly analyze a refrigeration or air
conditioning system.

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