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The Water Cooler
General Discussion
Home Air conditioner issue help
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<blockquote data-quote="_CY_" data-source="post: 1564482" data-attributes="member: 7629"><p>TXV = thermo expansion valve. it's job is to meter correct amount of refrigerant into the A frame or evaporator coils. </p><p></p><p>a small temperature sensing bulb is located on evaporator coil surface. temp raises, valve opens up to release more liquid refrigerant, which hits the coils and turns into gas during heat exchange process. </p><p></p><p>objective when charging a system is to fill system just full enough to deliver a solid stream of liquid refrigerant to the TXV or fixed orifice. too much refrigerant means liquid is delivered to compressor, slugging it. high probability of killing the compressor.</p><p></p><p>a defective TXV means wrong amount of liquid is being delivered to evaporator coils.</p><p>superheat and sub cooling verifies if system has the correct charge. explanation may be a bit much for most non HVAC folks.</p></blockquote><p></p>
[QUOTE="_CY_, post: 1564482, member: 7629"] TXV = thermo expansion valve. it's job is to meter correct amount of refrigerant into the A frame or evaporator coils. a small temperature sensing bulb is located on evaporator coil surface. temp raises, valve opens up to release more liquid refrigerant, which hits the coils and turns into gas during heat exchange process. objective when charging a system is to fill system just full enough to deliver a solid stream of liquid refrigerant to the TXV or fixed orifice. too much refrigerant means liquid is delivered to compressor, slugging it. high probability of killing the compressor. a defective TXV means wrong amount of liquid is being delivered to evaporator coils. superheat and sub cooling verifies if system has the correct charge. explanation may be a bit much for most non HVAC folks. [/QUOTE]
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