How to charge an AC unit using a Testo 550
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- čas přidán 13. 09. 2024
- This is how to properly charge an AC unit using digital manifolds. I demonstrate how to get wet bulb and outdoor temperature. I also demonstrate how to use the "supercool slide rule" to come up with required super heat. This is a fixed metering device, piston or orfice type system.
Please visit my Patreon page for additional content and to support my effort to help others be successful in the HVAC field. / abilityman
This is a GREAT video. I just received my Testo and my Fieldpiece PRH2. This video couldn't have made this process any easier on my piston R22 system. Thank you so much
3 times the wet bulb minus 80 then subtract the outdoor ambient and divide that by 2 and you get you required superheat....which you had 69 wet bulb X 3 gives you 207 ....less 80= 127 ......subtract your outdoor ambient of 87 = 40....divide by 2 gives your your target superheat of 20............................
Huh!! Dude thank you so much, this is very helpful 👌
They are great tool. I always use mine. Going to order the new ones
Cool video I just got my testo 550 can't wait to use it
Just found your channel and subscribed! I'm looking to get the testo 550, was also looking at the 570.. but the 550 will do me just fine lol thanx for the video brother
I like the 557 best. I also use the probes now when just checking the system. They all work great.
You need to be by the return at furnace when taking wb
Correct
Great Gauges, I love mine. @ :48 I see what appears to be wrench service port caps and if so I'd highly recommend getting rid of them for finger tight ferruled caps with o-rings. Those hex-caps (have no seals) destroy service ports by crushing the tips prohibiting the removal of the schrader cores. I had to evacuate a 410a system to re-thread and replace cores. Also, shouldn't that low-side thermo-clamp be at the service port for a more accurate total SH?
you can use the app on your phone to figure super heat. The testo app on my phone lets me put the wb and db to figure the superheat
I see you have the R22 can upside down putting it in as a liquid. That’s not necessary with that gas it’s not a blend so you can put the can upright and put it in as a gas. It would go slower for you like you said you wanted in this video to just put in a little bit at a time.
excellent information, disregard the haters
Good job
John, let me know when you are in Charlotte with your Testo 550!
I wont be going up that way. :) and I've graduated to my Testo 557 and Testo Probes
20 over outside old school rule of thumb
No 30 over is old school. 20 over started with 13 seer, lol
Thank you for the explanation good man
Good job John! I have the SMAN 3 but am looking to get the testo. How's your gauges holding up?
Maurice Brown excellent! We have 6 different gauge types in the testo brand across my company. I have had to send a set in two times. Once because my tech left them in the rain and once because the high side valve got too cold and it killed the packing. Other than that no problems for the last 2+ years.
I love my Testos and they hold up really well.
Greate
Do you still use the gauges? I just ordered the 550. Tired of the analog and wasting time with calculations. Nice review btw.
I've been using my new 550 for a month now and just love it. I could never go back to analog gauges now.
If I had a target of 8 subcooling and my testo manyfolds were reading 60 subcooling, does that mean I need to add more refrigerant?
I doubt you have 60 deg subcool. Either you have your clamps hooked up wrong or you have the wrong refrigerant selected. If you do in fact have 60 degrees sub cool then you would for sure have to REMOVE refrigerant from the system.
@@AbilityJohn I had my clamps hooked up right and the right refrigerant and I'm guessing my gauges or my scale are bad because I didn't even add the amount of refrigerant that i needed to add in the system. I had to add 15 ounces of R410A and I only added 5 ounces and that's what I'm getting
Sounds weird for sure. Sounds like an equipment malfunction. Either gauges, depressor or other. Hard to tell if I can’t get my hands on it.
On my 2.5 ton system superheat is 37 but subcooling is 3. Why is subcooling so low. Used my testo 550 to check it
Charge is low or it’s not metering correctly. Not reall enough data. Need outdoor temp, indoor wet bulb and pressures.
@@AbilityJohn indoor wb 68 outdoor temp 88. Suction side pressure 63. High side 222.
Your refrigerant is low.
Hi, just asking..
Is that Superheat & Subcooling can use in AC Vehicle?
for vehicle you just weight in
no. they are weigh in charge only