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!
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!
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..
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.
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.
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!!!
-Do you have what it takes? Quizzes: www.acservicetech.com/quizzes -Our Articles with many descriptive pictures: www.acservicetech.com/articles -Facebook posts every other day! facebook.com/acservicetech
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.
-My Paperback, E-Book, Workbook, Quick Reference Cards: www.acservicetech.com/store
-E-Book: play.google.com/store and search "AC Service Tech"
-My Paperback and Quick Cards: www.amazon.com/shop/acservicetech
-Support the Channel: www.patreon.com/acservicetech
-Tool List: www.amazon.com/shop/acservicetech
-Facebook posts every other day! facebook.com/acservicetech
-Our Articles: www.acservicetech.com/articles
-Our Quizzes: www.acservicetech.com/quizzes
Related Videos:
Explaining Superheat and Subcooling to Your Apprentice! ua-cam.com/video/2SEDe0v8VPY/v-deo.html
Total Superheat Method! ua-cam.com/video/s9I1aVugdkY/v-deo.html
Target Superheat Charging Chart! ua-cam.com/video/bIL9BrKCujc/v-deo.html
Tools Used in the Video:
Fieldpiece SDP2 Digital Psychrometer - amzn.to/2nniMVR
ST4 Dual Temp Meter - amzn.to/3dNHFkY
Wet Bulb Temp Sensor - amzn.to/346iFB4
General Tool Digital Psychrometer - amzn.to/2UxKxe8
Amprobe Digital Psychrometer - amzn.to/2yim7fR
Sling Psychrometer - amzn.to/2JwYtyQ
Quick Card with Target Superheat Chart - www.acservicetech.com/store
Checking the Charge Tools:
Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq
Refrigerant hoses with valves amzn.to/2aBumVI
Yellow Jacket Gauge set & hoses amzn.to/2vLVkV9
Yellow Jacket 4 Port Manifold w Hoses amzn.to/2BkuGIq
Digital Refrigerant Scale amzn.to/2b9oXYl
Ratcheting Service Wrench amzn.to/2dGV4Nh
FieldpieceSMAN380V Digital Manifold Set - amzn.to/2yqzBX6
FieldpieceSMAN480V Digital Manifold Set - amzn.to/2ytvGZL
Fieldpiece SDP2 Digital Psychrometer - amzn.to/2nniMVR
Testo 549 - amzn.to/2X0jJVj
Testo 550 - amzn.to/3bIQvhS
Testo 557 - amzn.to/2ylgeyw
Compact Ball Valve for Refrigerant Hose amzn.to/2KUisW8
QuickDisconnect 90 for refrigerant hose amzn.to/2MMtVcg
RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn
Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3
Fieldpiece Bead K Type Temp Sensor amzn.to/2DBwKfs
Fieldpiece Wet Bulb Temp Sensor amzn.to/2RRI7Tw
Fieldpiece TC24 Temp Clamp amzn.to/2qHLyjZ
Electrical Diagnosis Tools:
UEI DL389 Multimeter amzn.to/2xAdaJf
UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ
Magnet Jumpers- amzn.to/2PyKPQZ
Alligator Jumpers- amzn.to/2PxqJXn
Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V
Vacuum Tools:
JB 6 CFM Vacuum Pump - amzn.to/2nqbvo8
CPS 4 CFM Vacuum Pump - amzn.to/2DxgPwY
1/4" Appion Valve Core Removal Tool - amzn.to/2uYr8WL
5/16" Appion Valve Core Removal Tool - amzn.to/2JHmfbP
Appion Blue 3/8" to 1/4" Vacuum Hose - amzn.to/2uYlVyc
Appion Red 3/8" to 1/4" Vacuum Hose - amzn.to/2uYg6Ro
Yellow Jacket 1/4" by 1/4" 3’ hose - amzn.to/2umtcod
Appion 1/4" by 1/4" and 3/8” hose - amzn.to/2Zyxzx9
Uniweld 1/4" by 1/4" 2’ hose - amzn.to/2GFov1Y
CPS Vacuum Micron Gauge - amzn.to/2v1nM3O
JB Vacuum Pump Oil - amzn.to/2mGrlXy
Flaring Tools:
Yellow Jacket Flaring Tool - amzn.to/2OBxGlM
Spin Flaring Bits 1/4", 3/8", 1/2", 5/8", 3/4"- amzn.to/31BCs8Z
Yellow Jacket Flaring Tool with Set Depth - amzn.to/2QIKsQH
Yellow Jacket Torque Wrench - amzn.to/2NRR68Q
Uniweld Swage and Flare Kit- amzn.to/2T55jyn
Nylog - amzn.to/2MLJcch
Ridgid Tubing Cutter - amzn.to/2DnjjR1
Wolverine Tube Reamer - amzn.to/2QGLyMV
Swaging Tools:
Manual Copper Tube Swage/Expander- amzn.to/2WRPa1M
Spin Swaging Bits 1/4" to 7/8" for the Drill- amzn.to/2YQwwqS
Uniweld Hydraulic Swaging Tool- amzn.to/2MlrI8m
Uniweld Swage and Flare Kit- amzn.to/2T55jyn
Uniweld Hammer Swage kit- amzn.to/2CzWMMU
Uniweld 3/4" Hammer Swage- amzn.to/2CzXsSs
Uniweld 7/8" Hammer Swage- amzn.to/2Mja5WE
Uniweld Multi-Size Hammer Swage- amzn.to/2T3Cx1b
Brazing Tools:
Air Acetylene Torch setup - amzn.to/2aQalsb
15% Silver Brazing Rods - amzn.to/2gVLyLc
Ameriflame Oxy Acetylene Torch Setup #1 Tip - amzn.to/2SRm3JF
40cu B Tank to 10cu MC Tank Acetylene Tank Fitting - amzn.to/2GxZZPi
Nitrogen Regulator - amzn.to/2bXdR5f
Uniweld NitroVue Flow Regulator - amzn.to/2GnsaAo
Uniweld Nitrogen Flow Meter - amzn.to/2brvoBg
Stay Brite #8 Silver Bearing Solder and Flux - amzn.to/2XIDJsY
Aluminum Braze Rods - amzn.to/2IGNMu
Refrigerant Leak Detection Tool:
Accutrak VPE Ultrasonic Leak Detector amzn.to/2nFYKVe
Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal.
Pay attention guys. GREAT INFO for every tech. 👍
Much appreciated!
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?
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
Thank you very much Mr Craig 😊,i enjoy all your videos.
God bless you
You are very welcome
Great video Craig, I use the Fieldpiece ST4, PRH2, and the UEi DTH35. 👍👍
Your videos are excellent.
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 info!
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!
Hi Craig, thanks for the videos. On a minisplit system were do you rec9mmend taking the suoolied and return measurments
Awesome! thank's for Sharing!.
Thanks for watching!
Great Video. Thank you for sharing
Thanks for watching!
One question, for hvac system I need to calculate the depression and use the table of dewpoint and RH??
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!
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..
How much do you wet the wet sock and what kind of water warm,cold, hot?
How wet do you make the sock!
Nice products
Stay connected
Great vid!
Thank you for your support!
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!
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?
👍🏾👍🏾👍🏾👍🏾 thanks
No problem
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.
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.
can you please do video on non - condensables
What about testo tool for wet and dry bulb
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!!!
-Do you have what it takes? Quizzes: www.acservicetech.com/quizzes
-Our Articles with many descriptive pictures: www.acservicetech.com/articles
-Facebook posts every other day! facebook.com/acservicetech
How Can I Get The Super Chart Book
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.
Need to more on sub cooling and
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
👍👍
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 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.
Customers don't care, they just want you to stay outside.
In iraq used fluke