Our Inverter Mini Split Resources: Mini Split Book on Our Website- www.acservicetech.com/mini-split-book Mini Split Paperback on Amazon- amzn.to/3ytHJSs Mini Split Paperback on TruTech Tools- www.trutechtools.com/BooksGuides?aff=8 Mini Split E-Book on Google- play.google.com/store/books/details?id=HN-iEAAAQBAJ Mini Split E-Book on Apple- books.apple.com/us/book/id6445178399 Our Single Speed and Two Speed Air Conditioning Resources: My Paperback and E-Book: www.acservicetech.com/the-book My Paperback: www.amazon.com/shop/acservicetech Read the book reviews on Amazon! Check out our new Articles at www.acservicetech.com/articles Support the Channel by purchasing tools through Tru Tech Tools! Use this link www.trutechtools.com/?Aff=8 Save 8% at checkout using code "acservicetech" Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos- amzn.to/2aenwTq Here is a link to Refrigerant hoses with valves used in the videos- amzn.to/2aBumVI Here is a link to the UEI DL389 Multimeter used in the videos- amzn.to/2xAdaJf Here is a link to the Imperial 535-C Kwik Charge Vaporizer for Charging Refrigerant- amzn.to/2wFHtBW Here is the link to the Fieldpiece ST4 Dual Temp Meter- amzn.to/2wc1ME3 Here is a link to the Digital Refrigerant Scale used in the videos- amzn.to/2b9oXYl Here is a link for RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn Other tool links can be found in the video description section. ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. Check out other videos on the HVACR topics of interest at- th-cam.com/channels/OZR-1IqsAer9wzlvFgb4mA.htmlplaylists?view_as=public If you want to support the ACSERVICETECH Channel and receive more HVAC content, check out www.Patreon.com/acservicetech
Thank u for this video. I keep seeing it a number of times, to understand it better.God Bless u For sharing your knowledge.U TRULY are a great teacher.
Thank you very much! I'm having trouble with a 410 system that iced up. I thought that it was low on charge. I added refrigerant to get my 10* sub cooling but my suction was still low. I got a fan cycling switch to bring up the back pressure to no avail. I have a restriction and the only thing is the TXV. Thank you for your video.
The problem is on the evap coil side which includes the txv. Did you check the under side of the evap coil to make sure it was not covered in hair and dust? There could possibly be a restriction in the tubing from the distributor going into the coil or also a clogged liquid line screen. Here is another video on the topic. -- th-cam.com/video/W-IZzI3kjM4/w-d-xo.html --
acservicetech I looked at the indoor coil and noticed ice at the bottom of both sides of the coil. The call was initially for a water leak. So I started with a vacuum on the condensate line and in the pan. I turned up the thermostat up to 74* from 70* to help de ice the coil. I returned the next day to check my unit. The pressures were 170/70 for R410A. That's when I started noticing that there was more of a problem than low refrigerant charge. There is no liquid line drier on the unit. I just got a new TXV and drier and am going back Tuesday to attack it again. Any suggestions would be appreciated. Thank you. Have a great weekend. Blaze
If you want to support the ACSERVICETECH Channel and receive more HVAC Content, Correspond, or Collaborate on your endeavors- check out www.Patreon.com/acservicetech All of the ACSERVICETECH Playlists- th-cam.com/channels/OZR-1IqsAer9wzlvFgb4mA.htmlplaylists?view_as=public Submit your email to the ACSERVICETECH email updates list at info@acservicetech.com
I am a little confused. Why is the pressure on the high side lower when the TXV bulb is in the cold water? Since the TXV is closed shouldn't most of the refrigerate be in the condenser coil, creating a higher pressure as a result? Or does the excess refrigerant cause the temperature to be lower, causing a drop in pressure?
The reason is because if the txv won't let much refrigerant through then the refrigerant will not be able to absorb as much heat at the evap in order to reject it outside so therefore the pressure will be lower at the outdoor unit since there is less heat to reject. Great question!
Thanks for the reply and great video series!! I just got my EPA cert a while ago and started working for a service company and your videos have been an incredible help!!!
oh OK never seen in action like that if the txv is starved the sh will the high and if it's folded the sh is low,thank for the video and the insurance policy that no liquid hits the compressor
No problem, glad to help. Yes this is a clear test to see if the txv is actually operating correctly. A lot of people guess that the txv is the problem it seems but you should always test with the bulb to be sure. Thanks for the Comment!
What if I have negative of -50 subcooling The outside temp is 73 The liquid side is 146f The 410 on red gauge read 102f the pressure is 345psi The low side blue gauge read 42 f 410a and the psi is 145psi the temp on that pipe is 68f And its txv valve It was low in gas and I just put 3lbs of 410a The Luqied line dropped from 210f to 150f but what cause that negative subcooling !? Thanks
You can't have negative subcooling or negative superheat. One of the measurements must have been off. The temp on the liquid line will be the same or lower than the high side sat temp on an ac unit, thanks
@@acservicetechchannel thanks for the replay I use the same your meter you have the newest one and set on F also the gauge is yellow jacket brand new set I checked the temp reading and read.73f when I take it of the liquid line The (outside temp) The unit was very low on gas and the temp was reading 210f but after adding 3lb. The temp get down to 140f just few hours ago I was up there checking it again ! Thank you
Great Question! The bulb is normally installed in the inside of the coil box when the evap coil comes with a factory installed txv. If the txv is installed by the tech it is usually outside. If it is outside, make sure that there is insulation around it! Thanks for the Comment!
Yes, and I apologize for the ads. Please let me know if something does not seem right though like they are trying to show more than one add at the beginning. Thank you for being a part of the ACSERVICETECH Channel and I hope you are enjoying the videos!
![[UNCUT]“ฅนตื่นธรรม”ปะทะ“หมอปลา-ปู่มหามุนี-อั๋นโอกิ”สะเทือนกระทรวงเวทมนตร์ Iคนดังนั่งเคลียร์I10 ตค.67](http://i.ytimg.com/vi/peMD_SAkwNc/mqdefault.jpg)
Our Inverter Mini Split Resources:
Mini Split Book on Our Website- www.acservicetech.com/mini-split-book
Mini Split Paperback on Amazon- amzn.to/3ytHJSs
Mini Split Paperback on TruTech Tools- www.trutechtools.com/BooksGuides?aff=8
Mini Split E-Book on Google- play.google.com/store/books/details?id=HN-iEAAAQBAJ
Mini Split E-Book on Apple- books.apple.com/us/book/id6445178399
Our Single Speed and Two Speed Air Conditioning Resources:
My Paperback and E-Book: www.acservicetech.com/the-book
My Paperback: www.amazon.com/shop/acservicetech
Read the book reviews on Amazon!
Check out our new Articles at www.acservicetech.com/articles
Support the Channel by purchasing tools through Tru Tech Tools!
Use this link www.trutechtools.com/?Aff=8
Save 8% at checkout using code "acservicetech"
Tool List- www.amazon.com/shop/acservicetech
Support- www.patreon.com/acservicetech
For those that are looking for the tools used in the videos: (Linked Below)
Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos- amzn.to/2aenwTq
Here is a link to Refrigerant hoses with valves used in the videos- amzn.to/2aBumVI
Here is a link to the UEI DL389 Multimeter used in the videos- amzn.to/2xAdaJf
Here is a link to the Imperial 535-C Kwik Charge Vaporizer for Charging Refrigerant- amzn.to/2wFHtBW
Here is the link to the Fieldpiece ST4 Dual Temp Meter- amzn.to/2wc1ME3
Here is a link to the Digital Refrigerant Scale used in the videos- amzn.to/2b9oXYl
Here is a link for RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn
Other tool links can be found in the video description section.
ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.
Check out other videos on the HVACR topics of interest at- th-cam.com/channels/OZR-1IqsAer9wzlvFgb4mA.htmlplaylists?view_as=public
If you want to support the ACSERVICETECH Channel and receive more HVAC content, check out www.Patreon.com/acservicetech
Thank u for this video. I keep seeing it a number of times, to understand it better.God Bless u For sharing your knowledge.U TRULY are a great teacher.
excellent video! You go into great detail. Very well done.
Thank you very much!
I just ordered you book, learning with your videos is great, do you have any videos to learn about mini splits and working zones.
I have a couple but look up "acservicetech minisplit" thanks!
Very good video. This retraining or review of very important operation system. Thanks 👍
Thanks Lance!
Thank you very much! I'm having trouble with a 410 system that iced up. I thought that it was low on charge. I added refrigerant to get my 10* sub cooling but my suction was still low. I got a fan cycling switch to bring up the back pressure to no avail. I have a restriction and the only thing is the TXV. Thank you for your video.
The problem is on the evap coil side which includes the txv. Did you check the under side of the evap coil to make sure it was not covered in hair and dust? There could possibly be a restriction in the tubing from the distributor going into the coil or also a clogged liquid line screen. Here is another video on the topic. -- th-cam.com/video/W-IZzI3kjM4/w-d-xo.html --
acservicetech I looked at the indoor coil and noticed ice at the bottom of both sides of the coil. The call was initially for a water leak. So I started with a vacuum on the condensate line and in the pan. I turned up the thermostat up to 74* from 70* to help de ice the coil. I returned the next day to check my unit. The pressures were 170/70 for R410A. That's when I started noticing that there was more of a problem than low refrigerant charge. There is no liquid line drier on the unit. I just got a new TXV and drier and am going back Tuesday to attack it again. Any suggestions would be appreciated. Thank you. Have a great weekend.
Blaze
If you want to support the ACSERVICETECH Channel and receive more HVAC Content, Correspond, or Collaborate on your endeavors- check out www.Patreon.com/acservicetech
All of the ACSERVICETECH Playlists- th-cam.com/channels/OZR-1IqsAer9wzlvFgb4mA.htmlplaylists?view_as=public
Submit your email to the ACSERVICETECH email updates list at info@acservicetech.com
Well done helped me understand alot better
Thank you for your Comments!
Great video I believe you missed your calling.Great Teacher
Ha, actually I am a HVACR teacher of High School and Adults as well as an HVAC business owner. Thanks and glad you are enjoying the videos!
Phillip Joy he is teaching. Lol
Thanks AC tech great video
Glad to help Edwin!
I am a little confused. Why is the pressure on the high side lower when the TXV bulb is in the cold water? Since the TXV is closed shouldn't most of the refrigerate be in the condenser coil, creating a higher pressure as a result? Or does the excess refrigerant cause the temperature to be lower, causing a drop in pressure?
The reason is because if the txv won't let much refrigerant through then the refrigerant will not be able to absorb as much heat at the evap in order to reject it outside so therefore the pressure will be lower at the outdoor unit since there is less heat to reject. Great question!
Thanks for the reply and great video series!! I just got my EPA cert a while ago and started working for a service company and your videos have been an incredible help!!!
Awesome to hear!
Great question and great answer
Excellent explanation , great video!
Thank you very much Air Mechanical!
thanks for this well-explained video.
Thank you for your Comments!
my pleasure thank you for sharing god bless.
oh OK never seen in action like that if the txv is starved the sh will the high and if it's folded the sh is low,thank for the video and the insurance policy that no liquid hits the compressor
No problem, glad to help. Yes this is a clear test to see if the txv is actually operating correctly. A lot of people guess that the txv is the problem it seems but you should always test with the bulb to be sure. Thanks for the Comment!
Thank you or sharing this nice video, Well done.
nice thank's for sharing!!!!
Thank you very much for all of your nice and thoughtful comments!
What if I have negative of -50 subcooling
The outside temp is 73
The liquid side is 146f
The 410 on red gauge read 102f the pressure is 345psi
The low side blue gauge read 42 f 410a and the psi is 145psi the temp on that pipe is 68f
And its txv valve
It was low in gas and I just put 3lbs of 410a
The Luqied line dropped from 210f to 150f but what cause that negative subcooling !?
Thanks
You can't have negative subcooling or negative superheat. One of the measurements must have been off. The temp on the liquid line will be the same or lower than the high side sat temp on an ac unit, thanks
@@acservicetechchannel thanks for the replay
I use the same your meter you have the newest one and set on F also the gauge is yellow jacket brand new set
I checked the temp reading and read.73f when I take it of the liquid line
The (outside temp)
The unit was very low on gas and the temp was reading 210f but after adding 3lb. The temp get down to 140f just few hours ago I was up there checking it again !
Thank you
Nice
Thanks Joua!
Does the bulb have to be installed on the outside of the unit?
Great Question! The bulb is normally installed in the inside of the coil box when the evap coil comes with a factory installed txv. If the txv is installed by the tech it is usually outside. If it is outside, make sure that there is insulation around it! Thanks for the Comment!
+acservicetech thanks and i love the videos
I appreciate every one of your Comments! They mean alot!
Used Hey digital gauge to teach. Can’t keep track of all the numbers you’re saying. Sound like you auction.
Whats the super duper superheat?
What is superheat or what was the superheat in this video?
Jesus great video but I got so confused
Hey Will Love, check this txv playlist out- th-cam.com/video/w24L3VhNr4w/w-d-xo.html
Do you get paid for all these commercials I have to endure before you videos begin? I hope so.
Yes, and I apologize for the ads. Please let me know if something does not seem right though like they are trying to show more than one add at the beginning. Thank you for being a part of the ACSERVICETECH Channel and I hope you are enjoying the videos!