Hi Ron you sure are a good teacher you simplify the way a system should work you should teach back here in the uk England keep making these great videos
You are getting your subcooling from you temp read on your high pressure gauge and the temp read from your Digital thermometer on the high side near the service valve.. The difference between the two are your subcooling measured. Usually 10 deg is the norm for most manufacturers
hello Mr.walker. i find your tutorials very interesting,i just start HVAC. training a few weeks ago, and watching your videos gives me a much better idea and understanding of the a/c system service and repairs. can you please let me know how to follow the sequence of your tutorials from the start? thank you. miguel lopez, any help from other subscribers will be appreciated.
10-20 sub cool 10*SC below-flash gas (low) 20*SC above -lot of liquid in condenser (over charge) 16-20super heat 16*sh below - liquid going back to comp. (over charge) 20*sh above - dry vapor (under charge ) 16-20 airflow. r/s 16 below room much air flow. 20 above not enough air flow ... just a little something that really helped me out. you should draw out the refrigeration cycle and put those #s in play. it will make more sense
Thanks for the videos Ron. Viewing them all I learn the technology. As condensing and evaporation are where the real BTU's are transfered, why not target minimal Sc and superheat? Seems they are just buffers to insure full state change? Subcooling is just eliminating superheat. Why have either?
thanks man....cleared a lot of misconceptions....but i have a few questions Q1) Will low charge result in lower condensing pressure? just the way overcharge results in high pressure trips
I'm confused about the bit from 1:00-2:00. If your pressure and temp is measuring at that point in the line, then you are checking the the amount of subcooling at that point in the line. The pressure and temp gauge knows nothing about anything upstream. But you can deduce that the saturation point is happening upstream or downstream from that measurement point.
At the shown measure point at the condenser output to TXV inside the building, the subcooling will be a few degrees different. At 2:37 it shows 105F and 278 psig. at both Condenser and TXV input side too. *IF* that "highside" line runs through a hot attic above 105F then the pipe gains heat and the subcooling is less, if the pipe cools off more than the subcooling is more. And I am assuming that the pressure is about the same, OK R22 at 278 psig is 126 F for saturation, thus 105 is lower ie 126-105= 21 F subcooling. The high side of his diagram shows 278 psi everywhere, and 200F at (8) compressor output. The tempature drops as along its path though the condesoer down to 105F; ie think that was what his comment was from 1:00 to 2:00.
What is the difference between a 410a A/C unit and a r22 unit? And can you use a 410a ground unit on with a 410a evaporator/ valve. And use for freon 422D ? Will that work for both unit?
Hello, I work with Altierus Career College to develop online course content. In developing our HVAC Program, we came across this video and would like to include a link to it in the online course for student viewing. Please respond whether permission is granted or otherwise. Thank you! Maggie Lee
This training video is so well done that I don't think it can be anymore clearer. It helped me out so much. Thank you!
Fantastic explanation. I'm about 1/3 through my HVAC schooling and this basic info is still very much worth watching. Thanks for uploding.
Murray Melander Hi Murray, You're welcome.
?
Nhkkk$j. NBbV
--//u
Hi Ron you sure are a good teacher you simplify the way a system should work you should teach back here in the uk England keep making these great videos
I love these videos Im on module 7 of your online training. I'm really enjoying the coarse so It's worked out well with my apprenticeship!
You are getting your subcooling from you temp read on your high pressure gauge and the temp read from your Digital thermometer on the high side near the service valve.. The difference between the two are your subcooling measured. Usually 10 deg is the norm for most manufacturers
Hi Ron, TXV is a high sensible metering device that may require less that 15 minutes to response the refrigerant change~
Andy Law
hello Mr.walker. i find your tutorials very interesting,i just start HVAC. training a few weeks ago, and watching your videos gives me a much better idea and understanding of the a/c system service and repairs. can you please let me know how to follow the sequence of your tutorials from the start? thank you. miguel lopez, any help from other subscribers will be appreciated.
10-20 sub cool
10*SC below-flash gas (low)
20*SC above -lot of liquid in condenser (over charge)
16-20super heat
16*sh below - liquid going back to comp. (over charge)
20*sh above - dry vapor (under charge )
16-20 airflow. r/s
16 below room much air flow.
20 above not enough air flow ...
just a little something that really helped me out. you should draw out the refrigeration cycle and put those #s in play. it will make more sense
Thanks for the videos Ron. Viewing them all I learn the technology. As condensing and evaporation are where the real BTU's are transfered, why not target minimal Sc and superheat? Seems they are just buffers to insure full state change? Subcooling is just eliminating superheat. Why have either?
thanks man....cleared a lot of misconceptions....but i have a few questions
Q1) Will low charge result in lower condensing pressure? just the way overcharge results in high pressure trips
great vid very helpful writing my final exam next week
I'm confused about the bit from 1:00-2:00. If your pressure and temp is measuring at that point in the line, then you are checking the the amount of subcooling at that point in the line. The pressure and temp gauge knows nothing about anything upstream. But you can deduce that the saturation point is happening upstream or downstream from that measurement point.
At the shown measure point at the condenser output to TXV inside the building, the subcooling will be a few degrees different. At 2:37 it shows 105F and 278 psig. at both Condenser and TXV input side too. *IF* that "highside" line runs through a hot attic above 105F then the pipe gains heat and the subcooling is less, if the pipe cools off more than the subcooling is more. And I am assuming that the pressure is about the same, OK R22 at 278 psig is 126 F for saturation, thus 105 is lower ie 126-105= 21 F subcooling. The high side of his diagram shows 278 psi everywhere, and 200F at (8) compressor output. The tempature drops as along its path though the condesoer down to 105F; ie think that was what his comment was from 1:00 to 2:00.
so Ron, to be clear. with 410, which must be added from an inverted tank to ensure it fills as a liquid, , we still fill to the vapor side?
What is the difference between a 410a A/C unit and a r22 unit? And can you use a 410a ground unit on with a 410a evaporator/ valve. And use for freon 422D ? Will that work for both unit?
Thank you for the understandable explain.
Hello,
I work with Altierus Career College to develop online course content. In developing our HVAC Program, we came across this video and would like to include a link to it in the online course for student viewing. Please respond whether permission is granted or otherwise.
Thank you!
Maggie Lee
Very educational, now I understand, and why ya get ICE when low on charge! Cool....hahahaha, that's a pun
Cool vid Ron thanks
No problem Konan. You're welcome.
Thank you, this is a very good video and just what I was looking for. Bookmarked for future referral.
thank you...
i have in a low side is very high and high pressure is low that is the piston or what it is or the coil
Nice video Ron!
Thanks! Hey there's free HVAC training tonight if you're interested @PIID=EA52DD83894D38
Ron Walker HI ron iS THE SYSTEM RUNNING WHEN YOU ADD REFRIG TO CHARGE ??? tHANK YOU jim
i need help friend
Ajay