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In today\\u2019s podcast, Trevor and Bryan discuss how to troubleshoot thermostatic expansion valves (TXVs/TEVs). They also dive into the various types, applications, and components of TXVs.
TXVs are metering devices that control evaporator superheat to protect compressors from harm. Controlling heat also regulates pressure, which improves efficiency and prevents issues like floodback and overheating. TXVs contain several components that manage the forces that open and close the valve. These components include powerheads, diaphragms, springs, and more. The components all contribute to a delicate balance that can be broken when they fail or are installed improperly. TXV failures lead to high or low superheat and eventually compressor failure.\\xa0
When you diagnose a TXV, you may encounter hunting, broken powerheads, filthy screens, and improperly sized valves. Once you verify the cause of the issue, you\\u2019ll likely have to adjust the TXV, replace a component, or replace the whole TXV. That can be a tricky decision that will largely depend on the type of failure, the type of TXV (conventional vs. balanced port), and the TXV\\u2019s application (residential HVAC, refrigeration, etc.).
Join Bryan and Trevor as they cover:
And much more...
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Check out Emerson\\u2019s HVACR training HERE. Then, navigate to \\u201cContractor Tool Box Talks with Emerson.\\u201d
If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE.
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