some of us starting out need to keep it to the minimum amount and cheapest tools possible. do you think you could provide links to just those mandatory and the cheapest (within quality thresholds) and do that in categories. So for example, it would be good to know the entire set of tools needed for R-22 only (cheapest possible), then for R-410, etc BUT then a sub-category for the type of system (piston, etc.).. so what you get is a layered approach. So one category (or column on a spreadsheet) would say R-22 (Piston) and then list all the mandatory equipment needed at the cheapest possible price (within quality thresholds) and so forth and so on. Not sure if that's a lot of time , perhaps you already have something like that thrown together. Great video and excellence in your trade!
Craig, thanks so much for all your videos. I wonder if you can make a video for the scenario that the refrigerant is already really low, as soon as you start charging the system, the evaporator coil will freezing up, what to do in this situation? You know that the system is nearly empty on refrigerant, but when you try to charge it, the evaporator start icing. The video like that probably will benefit a lot of people. Thanks.
Tong Li if we find a system that low. We add Nitrogen, get the leak detectors out. Its getting out somewhere. Follow the line set as much as is possible, find a lot of leaks that way. But if you can’t/don’t find a leak, turn unit off, look at factory charge on data plate, put a couple pounds in, the start unit.
Hi. Since the wet bulb temperature decreases as the system runs, at what point do I decide that I have the correct super-heat, and I have the system properly charged? Thanks. Keep the videos coming. Great job!
You would need to line the target superheat and the actual superheat at the same value while the system runs. We have a full length article on the superheat charging method with pics at www.acservicetech.com/articles thanks!
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Is only recommend to measure WB before the filter? Or can i measure near the evaporator on package unit top of the roof by putting it near the door panel of evap..
Back in the 80's we installed a humidifier and the home owner was not convinced. She had a front -- area grew plants and it was very high humidity in there. She didn't even need a humidifier, but she was convinced it was too low. I made my first psychrometer with two identical thermometers and a sock. She claimed it was a "home made toy." So we bought a Bacharach for more money and went back out there WITH my "toy". I showed her that the figures were just a percent or two within the fancy instrument. GOD that woman was a bitch!!!
Works well but in the beginning, it's best to know how to do it manually. Begging the lazy person I have become , I also am using the FP probe set instead of the manual method but prefer the Measure quick Application inside.
If there are two power sources in a Dual-Fuel system, the call for W to fire heat is derived from Rh. It is going to depend on if the 2nd heat source's controls are entirely separate or integrated with the first.
In all my years of calling Hvac people to different buildings. I dont think I ever seen one person test the WB and DB. They just charge the thing. I suppose its fine to go about it this way but it only takes what.. 5-10 mins to check it correctly? Guess if you going to 5 or so places a day it could save you an hour.
hmmmm, i think that the web bulb temp and the dry bulb temp are different. The target superheat calculation requires indoor wet bulb temp. Sock makes it wet.
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Tools Used in the Video:
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I still have my sling from 1990. The good old days and my analog amp probe.
What tool is the most accurate? Sling probably no?
Pay attention guys. GREAT INFO for every tech. 👍
Much appreciated!
Thank you very much Mr Craig 😊,i enjoy all your videos.
God bless you
You are very welcome
Thank u Craig for the knowledge u impart to us in detail.God Bless ur efforts.
My pleasure! Thank you for your support!
I love the fieldpiece probes
Great info!
Great video Craig, I use the Fieldpiece ST4, PRH2, and the UEi DTH35. 👍👍
Your videos are excellent.
some of us starting out need to keep it to the minimum amount and cheapest tools possible. do you think you could provide links to just those mandatory and the cheapest (within quality thresholds) and do that in categories. So for example, it would be good to know the entire set of tools needed for R-22 only (cheapest possible), then for R-410, etc BUT then a sub-category for the type of system (piston, etc.).. so what you get is a layered approach. So one category (or column on a spreadsheet) would say R-22 (Piston) and then list all the mandatory equipment needed at the cheapest possible price (within quality thresholds) and so forth and so on. Not sure if that's a lot of time , perhaps you already have something like that thrown together. Great video and excellence in your trade!
Craig, thanks so much for all your videos. I wonder if you can make a video for the scenario that the refrigerant is already really low, as soon as you start charging the system, the evaporator coil will freezing up, what to do in this situation? You know that the system is nearly empty on refrigerant, but when you try to charge it, the evaporator start icing. The video like that probably will benefit a lot of people. Thanks.
Tong Li if we find a system that low. We add Nitrogen, get the leak detectors out. Its getting out somewhere. Follow the line set as much as is possible, find a lot of leaks that way.
But if you can’t/don’t find a leak, turn unit off, look at factory charge on data plate, put a couple pounds in, the start unit.
@@guyincascade Thanks very much for your suggestion.
Great vid!
Thank you for your support!
Awesome! thank's for Sharing!.
Thanks for watching!
Hi. Since the wet bulb temperature decreases as the system runs, at what point do I decide that I have the correct super-heat, and I have the system properly charged? Thanks. Keep the videos coming. Great job!
You would need to line the target superheat and the actual superheat at the same value while the system runs. We have a full length article on the superheat charging method with pics at www.acservicetech.com/articles thanks!
Great Video. Thank you for sharing
Thanks for watching!
Nice products
Stay connected
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Hi Craig, thanks for the videos. On a minisplit system were do you rec9mmend taking the suoolied and return measurments
One question, for hvac system I need to calculate the depression and use the table of dewpoint and RH??
How much do you wet the wet sock and what kind of water warm,cold, hot?
Hi Craig, pls make a video about proper charging of mini split system. Thanks
Gerry, did you read the article I wrote on the website www.acservicetech.com/articles on minisplit charging? Thanks!
Is only recommend to measure WB before the filter? Or can i measure near the evaporator on package unit top of the roof by putting it near the door panel of evap..
Back in the 80's we installed a humidifier and the home owner was not convinced. She had a front -- area grew plants and it was very high humidity in there. She didn't even need a humidifier, but she was convinced it was too low. I made my first psychrometer with two identical thermometers and a sock. She claimed it was a "home made toy." So we bought a Bacharach for more money and went back out there WITH my "toy". I showed her that the figures were just a percent or two within the fancy instrument. GOD that woman was a bitch!!!
Can I use my multimeter that is set up for one temp probe? Where can I get the socks??
Craig, what kind of tool bag do you use?
How wet do you make the sock!
There's also the Fieldpiece pocket psychometer. It's only like 60 bucks
My instructor showed me and my class the digital fieldpiece probes using the app
Works well but in the beginning, it's best to know how to do it manually. Begging the lazy person I have become , I also am using the FP probe set instead of the manual method but prefer the Measure quick Application inside.
👍🏾👍🏾👍🏾👍🏾 thanks
No problem
can you please do video on non - condensables
Need to more on sub cooling and
How Can I Get The Super Chart Book
What about testo tool for wet and dry bulb
Hi Sir why I have to seperate Rh and Rc if I have dual fuel appreciate your help
If there are two power sources in a Dual-Fuel system, the call for W to fire heat is derived from Rh. It is going to depend on if the 2nd heat source's controls are entirely separate or integrated with the first.
So, I could use my hvac Fluke meter temp probe with a wet sock on it? May be a dumb question for some but I’d like to know it’d work.
Good question. Yes. I do that as well, just remember that it will dry out in about 15-20 min.
@TheRealoldcar Thank you very much! I appreciate the reply.
👍👍
In all my years of calling Hvac people to different buildings. I dont think I ever seen one person test the WB and DB. They just charge the thing.
I suppose its fine to go about it this way but it only takes what.. 5-10 mins to check it correctly?
Guess if you going to 5 or so places a day it could save you an hour.
why do you upload at 4am?
Prob has it scheduled to go public at that time. You can schedule you video to go public at anytime you want
IDWB x 3 - 80 - ODDB / 2 equals target superheat
Customers don't care, they just want you to stay outside.
Why use the sock ? temp is temp....
hmmmm, i think that the web bulb temp and the dry bulb temp are different. The target superheat calculation requires indoor wet bulb temp. Sock makes it wet.
its about humidity and dew point, things like that...so it's more than just temp
Perhaps you should look up what is wet-bulb and dry-bulb.
In iraq used fluke