Copeland Hermetic Liquid injection Valve replacement

[@jrh86]

Excellent diagnostics and very interesting part functionality and failure tutorial 👍👍👍

[@drlfter]

Fantastic video and I appreciate that you took the valve apart and thoroughly explained how it works. People like you are a godsend for others just getting started in refrigeration or someone with a curious itch. I've subscribed and will be watching more of your videos. Thank you and keep up the great work sir!

[@axiomteck]

the best HVAC and refrigeration videos, nice that you explain all the details of each component's great work. looking forward to seeing more and more

[@RodrigoRamirez-fc5hv]

How do you check to see if it is working.

[@Mgear1217]

Great video. Thanks for sharing.

[@ebbyt00]

Thanks for the video, I am wondering what was the symptom of the bad injection valve? how did you narrow it down?

[@donalddperez]

Ebrahim Tirgardoun the compressor was overheated and fried. While the compressor was running, it was hot and the injection valve was not feeding. Put a thermocouple on the outlet of the valve and one on the top of the compressor. It’s supposed to open when it gets hot. Don’t know the exact specifications but you’ll see the valve temperature out drop when it feeds and cools the compressor. Simulate a hot compressor by covering part of the condenser. Thanks for the question 🤙

[@isaaccampos7276]

Thank you for sharing

[@shellopoy4398]

the 3/8" connection is connected to liquid line right?

[@mikemalone6103]

How did you( test ) to determine the valve wasn’t functioning as designed?

[@DRCProductions]

Verify valve is opening and closing to valve set points. See chart and verify. If it is working the there is a different problem occurring. Put a thermocouple where the valve sensing bulb is located, It’s nice to have Bluetooth sensors so you can run graphs.

[@mikemalone6103]

I spoke with Copeland and they they said depending on my compressor, it can be the 193degree or 256degree ( I believe) it’s stamped on the side of the valve body… it does have a SOV upstream so that it only get liquid when the contactor is pulled in.

[@mikemalone6103]

And I felt another similar injection valve to it nearby on another unit, and it was sweaty cold keeping the dlt closed and the discharge line tolerable

[@christianbudds2675]

At what temp did the valve begin to feed?

[@westsidehvac1097]

How do you determine the valve is bad?

[@DRCProductions]

The compressor label on the top was brown from over heating. It was running but bypassing discharge gas internally. it was very hot and the valve was not feeding. Years of experience has taught me to use my free tools. Sight, smell, feel and hearing. Changed the compressor and valve then tested the valve which began to feed after I restated the compressor, when in doubt change it out.

[@ericdvorak7030]

Are these adjustable like a txv is?

[@DRCProductions]

No they are not adjustable. They come in different temperature ratings calculated by Copeland. 🤙

[@ericdvorak7030]

@@DRCProductions kind of what I thought, got one barley passing liquid with the compressor shutting down on internal temp, valve bulb probably leaked down. Thanks for the quick reply.

[@DRCProductions]

@@ericdvorak7030 When in doubt change it out.