HVAC 083 The 3 position service valve
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- Опубліковано 16 вер 2024
- we have talked about this valve before, but it is so easy for a student or new tech to get them mixed up, I am covering it again in detail and this time I cut one open.
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Awesome video sir. Very well explained and simple.
Such an amazing video I believe I’m not even finished with it (5:57) talking about when you mid seat the valve it’s allows all 3 ports to be open and you can use gauges.. but don’t forget to BACKSEAT that same valve.. lol anyways I do commercial hvac and just today have one of my first side jobs and was so confused and what they taught me in school about which position I should put it in etc etc .. this video gave me lots of knowledge and familiarity with what I don’t usually see Day to Day which would be package units , anyways thank you and look forward to more videos. 👍🏻
Thanks Ty. Im a 58 year old new tech. Just got my cert and trying to help a friend w a Carrier at his home I couldn't figure out how to get pressure at the service port. Now I understand it fully. My Trane at home and the Daiken heat pumps at work all have schraders. I'll never be a full time tech w a lot of experience so your experience is invaluable to me.
Just remember, your never to old to learn something new. A few years of applied and active learning outweighs years of experience in rules of thumb and shortcuts.
One of my students years ago was a retired pilot from Venezuela at 72 years young.
You got this! I'm glad that my videos can help. Keep at it and never stop learning and never give up.
@neiltasselmyer5711 ...and remember that you are an inspiration for the younger guys. I know a lot of people in their 40s and 50s who struggle in their current jobs and afraid to learn something new , and people like you show that the limits are in our minds and as Ty said its never too old to learn something new.
Awesome cut-outs again! Really impressed by these. Makes it a lot easier to visualize the inner workings of these service valves..
Glad you're also using the term 'front-mid-back seat' as I've met some who'll just use term 'open or close' which is quite vague.
Thanks It was a little tricky getting those cut open.
@@love2hvac Yeah I could only imagine how tricky it is to cut these sections. Definitely NOT easy!
G'day Ty, so we were in class today and the teacher was trying to explain to the students how these valves work. Next thing you know were watching this brilliant video on the big screen! Thanks again 😁
Front Seat, Cracked Off Front Seat, Center Seat, Cracked Off Back Seat, Back Seat. Don’t forget to loosen the packing for adj. & re-tighten when done.
Thank you for clearing up the language. I appreciate the video.
Well explained
Thank you Sir….! Very clear….!
Thank you so much for your Great Explanation..... and Great Video 👍❤️
Rally nicely shown how it works, good job :)
Superb video
thank you, your a great teacher
Thank you
Very good explanation
Definitely good content
Damn, you are just the best!!
I'm not but I do appreciate the complement
Thank you Ty good video with full explanation. When I was in school and tried to open the cup for service valve I felt high pressure then the refrigerant was loose, the valve was back-seated, then I made a vacuum and charged it and take off the manifold gauge there’s no leak till know I’m confusing what’s happen before and after.
They also tend to leak too. Especially if seated too agressively .
Thank you 👍
I've seen those valves used on a compressor suction & discharge ports with the pressure switches connected to the service port. It caused huge problems as engineers fully openened the valves blocking the service port and sensors.
These service ports are not designed to be used for pressure controls.
Unlikely an engineer would design that. I often see service personnel try to add pressure switches here. We have been to many jobs where we had to properly install the correct switch on its dedicated port.
@@love2hvac Yes, I work on large ships where the engineers most of the time arent refrigeration experts but nevertheless it makes up 5% of their work. Due to the many different equipment and systems they have to work with they are technical generalists. (Diesel Engines, Boilers, Hydraulics, Pneumatics, Refrigeration, E&I, Automation. etc. etc.)
This leads to sometimes seemingly incompetent decisions, although i cant fully blame them. (It's hard being an expert in all those field at the same time.) It is the sole reason I self study and find so many sources like HVAC School & your channel to learn more practical things and try to remember them by the time i need it.
Do you have a patreon or similar? You deserve support.
Great video
that really means a lot from you. I'm honored. Thank you
Great Video awesome 🤩 question 🙋🏽♂️ what’s the best position to vacuum the system and check for leaks… also pressure test which may be the same position… thanks 🙏🏽
Keep going in the series, I cover vacuum in pretty deep detail with over 13 videos. Leaks are in the works.
The Best
Why would it leak ? It should have a valve to prevent leaking from going out.
With no receiver where is it pumping down too? The condenser??
Residential yes, the condensor is usually large enough to handle it. The microchannels would not be able to.
Although there was recently a comment of a person installing walk in freezer equipment without a receiver.
Is there a direction of flow? Meaning dies it matter which port to the receiver & to the metering device.....
Often on residential equipment the port is connected with the line set outside of the equipment.
However I'm refrigerating condensors, the port is often with the condensor side.
It will work in either direction but it's important to understand that the service port will be connected to the pipe at the top when the valve is closed (front seated). That way you won't get useto just one method.
@@love2hvac Thnk you, I appreciate your response! reason I ask is I ran into a unit where the condenser side entered the top as well as the compressor inlet on the low side. I don't see how that will work when trying to isolate the 2 sides other than being dependent on the compressor valves. Seems to to me the suction line should enter the top and exit the bottom to the compressor
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Man I dislike these 😒