Professor Jennings, Dennis D. here class 2014-2016. I never knew you had a channel. Hell ya. FTCC HVAC has the best instructors and all the equipment to teach who are willing to learn and put forth the effort. Don't know what's going on with the beard boss. Thanks for sharing your expertise in HVAC. FYI: LIL Dicky- save that money has 186m views. I think it had 32m when in class. Happy thanks giving. LOL
Oh...I remember. Good to hear from you. Come by the shop and I'll give you some lessons in growing a beard. I have picked up a few pointers since I saw you last. This little channel ain 't much but a start for what we got going on. Just trying to help where I think I can but I'll probably never catch up to Lil Dicky 😪.
I am usually just trying to get across to new techs in the field because I remember when I started and how long it really took me to get it down right. My only hope is to help a little. Good luck and stick with it
If you don't have any data on the unit, some published books will likely lead you in the 10 to 15 degrees area for both. If you are able to read the data plate/manual for the unit it might lead you to a different reading. I think the lowest I remember is 7 but I would have to check.
You've got it wrong John when hooking your high side gauge to the compressor discharge pressure port on the compressor. That port just giving you the high temperature high pressure super heated VAPOR It is NOT the saturated condensing pressure YOU NEED to calculated the sub cooling. So the number of sub cooling you provided later in the video is NOT CORRECTED.
While I admit I am not the good Lord's gift to any portion of the HVAC field and I may have learned from the "HVAC for Dummies" book...I don't that I agree with your capitalized wording. On most every package unit I have been to there is only 2 pressure ports...one for low pressure and one for high pressure. The pressure, according to the refrigerant PT chart, gives you the saturation point -- of course you use that for a portion of your sub-cooling calculation. I know that the compressor discharge temp is much hotter that the saturation point on the high side and you are correct in that it is superheated. But the job of the condenser is 1st to remove that sensible heat to the point that it is at the saturation point so the latent heat process can start. Eventually at the end of the coil going back to removing more sensible heat from the liquid and getting it subcooled. Maybe I occasionally mis-speak but that is accidental and I don't know that I did in this case. If you care to point me to the time in the video I will gladly look at it and correct myself if I need to...I have no problem admitting a mistake.
Professor Jennings, Dennis D. here class 2014-2016. I never knew you had a channel. Hell ya. FTCC HVAC has the best instructors and all the equipment to teach who are willing to learn and put forth the effort. Don't know what's going on with the beard boss. Thanks for sharing your expertise in HVAC. FYI: LIL Dicky- save that money has 186m views. I think it had 32m when in class. Happy thanks giving. LOL
Oh...I remember. Good to hear from you. Come by the shop and I'll give you some lessons in growing a beard. I have picked up a few pointers since I saw you last. This little channel ain 't much but a start for what we got going on. Just trying to help where I think I can but I'll probably never catch up to Lil Dicky 😪.
Great job John your videos are always informative and interesting always look forward to new ones
Thank you. I try...that's all I can say!
Very informative. Thank you
John I miss your videos. Please keep them up. You’re a great teacher of this career field.
Thank you. Work has changed a little so I get them when I can.
I just was asking my coworkers about where is the best way to do the sub cooling, finally I know where thanks 🙏 I’m new in the trade.
I am usually just trying to get across to new techs in the field because I remember when I started and how long it really took me to get it down right. My only hope is to help a little. Good luck and stick with it
Thank you sir, your information really helps me out in the field. Thank you 🙏🏾
John's videos are the best
Great Info thanks
What is a good superheat and subcool for package unit? Thanks you
If you don't have any data on the unit, some published books will likely lead you in the 10 to 15 degrees area for both. If you are able to read the data plate/manual for the unit it might lead you to a different reading. I think the lowest I remember is 7 but I would have to check.
You've got it wrong John when hooking your high side gauge to the compressor discharge pressure port on the compressor. That port just giving you the high temperature high pressure super heated VAPOR It is NOT the saturated condensing pressure YOU NEED to calculated the sub cooling. So the number of sub cooling you provided later in the video is NOT CORRECTED.
While I admit I am not the good Lord's gift to any portion of the HVAC field and I may have learned from the "HVAC for Dummies" book...I don't that I agree with your capitalized wording. On most every package unit I have been to there is only 2 pressure ports...one for low pressure and one for high pressure. The pressure, according to the refrigerant PT chart, gives you the saturation point -- of course you use that for a portion of your sub-cooling calculation. I know that the compressor discharge temp is much hotter that the saturation point on the high side and you are correct in that it is superheated. But the job of the condenser is 1st to remove that sensible heat to the point that it is at the saturation point so the latent heat process can start. Eventually at the end of the coil going back to removing more sensible heat from the liquid and getting it subcooled. Maybe I occasionally mis-speak but that is accidental and I don't know that I did in this case. If you care to point me to the time in the video I will gladly look at it and correct myself if I need to...I have no problem admitting a mistake.