I started from the beginning of your videos 1-60 I'm amazed that you are so generous spreading your knowledge to us. I'm so thankful for you and your videos keep it up I've learned so much i started hvac when i was about 20 or 21 I'm 29 now its been rough for me to understand refrigeration for awhile because we need people like you to be patience with us. Throughout my career in hvac I have not had very much luck but with the blessing of hvac videos and yours is a plus learning on my own. Thank you ty your the best!
Watching training on TXVs at Jackson Controls, someone asked if they could be tested before installation. The trainer mentioned putting the bulb in ice water and using ONLY your body heat for opening. I tried it with an automotive system TXV, but using propellant from canned air to chill the powerhead. Works well as you try to blow through the valve. The automotive TXV is a good contrast to the standard HVAC version. Compact, easy to pull out the valve plug and see the seat with the rod coming down from the powerhead. They don't have a bulb, just the powerhead because they run the suction line back through the valve body. Also, gets equalization through leaks around the rod bushings. I was fortunate to find one on Amazon Outlet for $7 clearance to play with.
I haven't played with the automotive ones yet. I have a gadget for testing TXV I will show it in a later video I use it for showing a variety of bad txv's I dont like the Idea of blowing into any refrigeration component. the amount of moisture in each breath is high. CO2 or nitrogen is a good compromise.
@@love2hvac Yeah, I was just using that to explore the device. Probably better if you want to test a component that will be used in a system is to run nitrogen with a flow gage.
Love your channel. I would like to ask a question. Can you install a TXV in place of the Orifice if there is no adaptor conversion kit in your Country? If yes how? Can you please make a video if possible or just let me know ? Thank you so much you are a great Teacher, Love the way you explain things.
Yes, I prefer the factory kit for easy but I have done hundred without. Take the fixed office out and put the connector back. Get properly sized (ton) TXV with S for solder/braze and the correct liquid line size (3/8 here for resedential) The cut the liquid line as close to the evaporator as possible, braze in the TXV while flowing nitrogen. Braze in a service port on the suction line for the equalizer tube of the TXV. Mount the sensing bulb according to the instructions with the TXV. Pressure test, vacuum, recharge.
@@love2hvac Thank you so much for your reply, I have to do two conversions on two 5 ton R410a air handlers and I wondered if the spacing in between the connector would cause any trouble since the orifice would be missing do to turbulence from the outlet of the TXV with only the hole in the middle to the entrance of the distributer and if the dead spots around the hole would cause me any trouble. I also have no choice but to install a reducer at the outlet of the TXV since I can only find a TXV with 1/2'' outlet to reduce it to 3/8''. If you want to comment please do. I will let you know how it went if you like. Thank you again so much. George
Besides insulating the bulb, Have you found it necessary to insulate the tubing of the sensing bulb or equalizing connector when the txv is installed outside the evaporator case installed in attics that get hot?
It really does not have enough effect worth the effort. I have insulated one before but I did not see any difference. It by science has to have some heat transfer but not enough to worry about.
@@love2hvac Gotcha. I would agree with you. Thank you for your on going lessons which approach HVAC training from a very different and unique approach. Your's have the details/insidghts that I have not seen in any other educational presentations. Compliments well of the others such as ACservicetech, HVACshool, and Jim's MQ.
If threaded fittings are approved to use for metering device, why are they not used for other connections? Why do we have to braze if the threaded connection can hold the pressure? If it can't hold the pressure and is expected to leak, they would never use them in the first place, right?
I started from the beginning of your videos 1-60 I'm amazed that you are so generous spreading your knowledge to us. I'm so thankful for you and your videos keep it up I've learned so much i started hvac when i was about 20 or 21 I'm 29 now its been rough for me to understand refrigeration for awhile because we need people like you to be patience with us. Throughout my career in hvac I have not had very much luck but with the blessing of hvac videos and yours is a plus learning on my own. Thank you ty your the best!
I really appreciate that!
I was having an off week this week and your message came at just the right time. Thank you.
Best vid on a txv I’ve seen!
Watching training on TXVs at Jackson Controls, someone asked if they could be tested before installation. The trainer mentioned putting the bulb in ice water and using ONLY your body heat for opening. I tried it with an automotive system TXV, but using propellant from canned air to chill the powerhead. Works well as you try to blow through the valve.
The automotive TXV is a good contrast to the standard HVAC version. Compact, easy to pull out the valve plug and see the seat with the rod coming down from the powerhead. They don't have a bulb, just the powerhead because they run the suction line back through the valve body. Also, gets equalization through leaks around the rod bushings. I was fortunate to find one on Amazon Outlet for $7 clearance to play with.
I haven't played with the automotive ones yet.
I have a gadget for testing TXV I will show it in a later video I use it for showing a variety of bad txv's
I dont like the Idea of blowing into any refrigeration component. the amount of moisture in each breath is high. CO2 or nitrogen is a good compromise.
@@love2hvac Yeah, I was just using that to explore the device. Probably better if you want to test a component that will be used in a system is to run nitrogen with a flow gage.
Great job
Goodbye sheet of paper and fixed orifice🤣
Thanks Ty 🙏It's easier to learn this way!
Love that effect 😂 when throwing the orifice away
That was my wife, I will tell her you said that, it will make her day!
@@love2hvac Shana rishona (in Hebrew first year of marriage) gotta make the wife happy 😂
You are doing gods work!!!!!🙏🏾🤣
Love your channel. I would like to ask a question. Can you install a TXV in place of the Orifice if there is no adaptor conversion kit in your Country? If yes how? Can you please make a video if possible or just let me know ? Thank you so much you are a great Teacher, Love the way you explain things.
Yes, I prefer the factory kit for easy but I have done hundred without.
Take the fixed office out and put the connector back.
Get properly sized (ton) TXV with S for solder/braze and the correct liquid line size (3/8 here for resedential)
The cut the liquid line as close to the evaporator as possible, braze in the TXV while flowing nitrogen.
Braze in a service port on the suction line for the equalizer tube of the TXV.
Mount the sensing bulb according to the instructions with the TXV.
Pressure test, vacuum, recharge.
@@love2hvac Thank you so much for your reply, I have to do two conversions on two 5 ton R410a air handlers and I wondered if the spacing in between the connector would cause any trouble since the orifice would be missing do to turbulence from the outlet of the TXV with only the hole in the middle to the entrance of the distributer and if the dead spots around the hole would cause me any trouble. I also have no choice but to install a reducer at the outlet of the TXV since I can only find a TXV with 1/2'' outlet to reduce it to 3/8''. If you want to comment please do.
I will let you know how it went if you like.
Thank you again so much.
George
Great video. Make sure you take the schrader valve core out before you attach the equalizer tube. Talking from experience. Lol
Very good point!
I will revisit TXV later with cut aways, diagnostics, installations and more. So much about these beauties.
Besides insulating the bulb, Have you found it necessary to insulate the tubing of the sensing bulb or equalizing connector when the txv is installed outside the evaporator case installed in attics that get hot?
It really does not have enough effect worth the effort. I have insulated one before but I did not see any difference.
It by science has to have some heat transfer but not enough to worry about.
@@love2hvac Gotcha. I would agree with you. Thank you for your on going lessons which approach HVAC training from a very different and unique approach. Your's have the details/insidghts that I have not seen in any other educational presentations. Compliments well of the others such as ACservicetech, HVACshool, and Jim's MQ.
Thank you, I appreciate that! We all work together for the same goal. I could not ask for better friends and colleagues.
If threaded fittings are approved to use for metering device, why are they not used for other connections? Why do we have to braze if the threaded connection can hold the pressure? If it can't hold the pressure and is expected to leak, they would never use them in the first place, right?
That's right. I've wondered that myself.
I think it comes down to cost.
A Ty video a day, keeps the stupid away. 🤙
🥃🤠👍
I'm waiting for a psychometric chart tutorial?
🤣😂🤔🍺
Stay safe.
Retired(werk'n) keyboard super tech.
Wear your safety glasses.
Oh I can't wait to get there! I love phycrometrics!
Ty,
A good question- would you agree?