TCB EPFAN the video shows user interface of the manifold. Its up to you to determine everything else. lol. You dont sleep at night do you?

It doesn't "fractionate" to that much of a microbe to reclaim then recharge. Unless you charge an insane amount of money for service then you just lost money doing that job

You would still need it

Yeah, this video confused me because of this as well...

After a little thought...I suppose you'd need to open up the valves to get the pressure readings for low and high. Charge would come through the refrigerant line opening and would only need to be opened once you began the actual charging step. Can anyone confirm this?

​@@mercurynfoThe hoses are cracked open from instrument before you connect to compressor to loose any pressure in lines or open knobs, but pressure still needs somewhere to release . As far as getting a reading , close knobs and as soon as hoses are connected to unit, pressures are indicated.

Gauges will not measure that low, I think only 50. Need another instrument,

target Sub Cooling on condenser for TXV

Txv general rule is 10° if not stated

Mack wouldnt that be a problem opening both lines at the same time?I was confused when he said that

@@doublewide420 this is before connecting to unit, you must loosen hoses on gauge to loose pressure

Cliff Lind

I am doubting this system is low. A low system should also have a classical low sub-cooling, but this one has a high sub-cooling. This is indicative of a restriction backing up the refrigerant into the condenser increasing the condensing pressure to 363 and 109F on a measly 75 degree day... that thing is working MUCH too hard to condense refrigerant... or the condenser coil is badly plugged... Anyway, a restriction would also yield lower suction pressures, resulting in lower saturation temperatures as well as warmer suction line... higher super-heat. He probably has the wrong metering device in it, lol.

Was wondering the same thing.

Law of physics

because the Compressor can not discharge high pressure anymore. Therefore, lower suction pressure.

That's exactly WTF I was wondering too, makes absolutely no sense to me I would've thought it was overcharged to begin with lol

Your suction pressure dropped while your head pressure rises. This is because it's a fixed orfice and only allows for so much refrigerant to go through. Try seeing some more basic refrigeration videos and you'll see what I'm talking about. It's confusing at times because if you overcharge it will do something similar as well. Or they both rise. Been doing this for several years and I always have to review the basics when I haven't played with the refrigerant for a while.

I'm here wondering the same! 🤔

This cat is full of 💩 😂

How much testo prise

Tighe Philbin subcooling

close knobs before attaching to unit

Do not buy fieldpiece. Seriously. Do the research. The Testos are so much better. I have the 557 and love them. I researched for months before choosing my 557. For the love of God do not buy the SMANS. My buddy has them. We have compared and Testos are better.

Justin Mikola I have the Testo 557, but actually wanted Sman 4, It tells you the target superheat. No, so around about 9 or 10 or whatever, you know because it give you what your superheat should be. We live and regret!

Jerry Washington buy the iconnect for those features. :)

This was a fixed-orifice metering device (not a TXV which would be charged by sub-cooling), so this unit is charged based on Super Heat. Adding refrigerant decreases the super-heat and increases the sub-cooling. He determined his target super-heat by looking at the chart he showed you... To do this he took an indoor-web-bulb of air entering the indoor "evaporator" coil. Basically a cotton covering over a thermometer dipped in water with air flowing over it is the wet-bulb temperature. This web bulb temperature was presumably 58 F, and he took an outdoor dry-bulb of air entering the condenser unit (from the sides not the top)... This was 75F. Using the chart, he determined the target or "desired" super-heat was 9 F. That said, his operating or "actual" super-heat was too high at 16F, so he added a little bit of refrigerant and let the unit run for a while and stabilize. To do this with an analog gauge, you would get a pressure reading such as 127 PSI and using a pressure-temperature chart looking look up that pressure for R-410A would be around 44 F saturated temperature... That is the temperature the refrigerant boils at and is actually boiling at within the evaporator coil. The Testo has this PT chart built in. On an analog gauge, you would just read the pink Saturated Temperature Ring and where the needle crosses is the saturated temperature. Anyway, the actual temperature of the suction (bigger line, low-side) would be warmer than that. For example in this video the suction line is about 60 F... the difference between these is 16 degrees of super-heat. That is to say the evaporator coil boiled off ALL the refrigerant then picked up a bit more heat before returning to the compressor. You MUST have some super-heat or else you will be trying to compress liquid refrigerant which will ruin a compressor. If you have too much super-heat, the compressor can overheat. When he adds refrigerant, the low and high side pressures will go up... as such the saturated temperature should go up. If the line temp stayed the same, the super-heat would decrease because it is the difference. That said in reality the suction line gets colder, too... so both of these are moving targets. Ironically, when a system is low on refrigerant, the pressures are low. The saturation temperature of the evaporator coil (indoor coil) gets too low (below freezing) and in high-humidity locations freezes up with water plugging up. that is to say the coil is actually colder when the unit has less refrigerant within it. That said if it gets too low not only does it freeze up, but the coil is not properly filled for thermal heat transfer either. The high-side pressure of 362 PSI shown corresponds to the refrigerant condensing at a saturated temperature of 79 F shown. That is to say by compressing the refrigerant as it enters the condenser coil it gets HOTTER than the outside air (remember air temp is 75 F)... then that giant fan blows air over it rejecting heat out the top of the condenser.. At any rate the refrigerant becomes a high-pressure liquid as it exits the condensing coil and gets delivered to the air handler in that smaller liquid (high-pressure) line. Sub-Cooling is then the number of degrees below the saturation temperature it is cooled. If the saturation temp is 109F (boiling point) as shown when compressed to 363 PSI but the outdoor temperature is 75 F it is pretty easy for the condenser to blow out very hot air! His line temperature is shown at around 79 F. That is to say there is around 30 F of subcooling. That is that the refrigerant was cooled 30 F below its boiling point. We use this to ensure we are delivering a solid column of liquid refrigerant to the metering device of the air-handler directly before the evaporator coil. Once it hits the metering device (a restriction) there is a sudden pressure drop and temperature drop where the refrigerant becomes a low-pressure liquid and pretty quickly flashes to vapor... The blower motor blows room temperature air that is undesirably too warm over this cold coil where it picks up heat warming the refrigerant... It just keeps circulating and blowing air. To me that Sub-Colling number is a bit high, but irrelevant for charging this type of system, but it probably indicates there is a problem. Usually machines that are low on refrigerant have abnormally low SubCooling numbers, too. This one likely has a restriction somewhere causing the refrigerant to back-up... causing high-side pressures too be too high, and the low-side to bee too low. The machine seems to be working too hard to condense refrigerant (at 363 PSI and 109 F on a measly 75 degree day). My system, a cheap Goodman on a 75 degree day will condense at maybe 320 PSI (probably 300 PSI if I ever get around to cleaning the condenser coil). At any rate normal SubCool values I see are around 10 very rarely over 15. He might have a plugged receiver/drier or perhaps the wrong sized metering device (too small a hole in the piston). This is why you Want to print the technical notes for your system and for various environmental conditions ensure you are within range.

+NETWizzJbirk Great comment. Read/studied every sentence.

@@hg2. Ditto on that. I reread Netbizzjbirks comments several times. He should be teaching if he is not already.

clay125 Testo's don't give you your target superheat. Manufacturer's spec. have a design tem. condition. Telling you what the superheat is, is nothing, it should tell you your target superheat. Where you are and where it should be.

How's it going to give you target superheat when its different for every unit and situation....

or over charged

Shouldn't the SuperHeat be balanced against the amount of SubCooling ?

To release any refrigerant trapped in the gauge manifold or hoses... then to zero the readout

As long as it's added slowly your not going to mess it up. Better yet you can add a flash adapter to your hose so it flashes the liquid into a gas and you'll never slug a compressor

Jahmal R. Standley from what he did, he guessed. I was wondering the same thing. you can guess and see what the systems goes to within 10 mins.

True

Hey! He ain't pay for the 410 anyway:))) only the company cares...lol

Jahmal R. Standley Sman 4 has a target superheat button. I've gotten stuck with Testo 557 as far as I can tell the don't give you a target superheat. I'm angry as all he.., stuck with something I'm not pleased with!

Jerry Washington man.don't get lazy...LOL.get you a fieldpiece srh3.nice tool. Iove my testos!

You can only rebuild the valves. The rest has to get sent in

@@cplg2111usmc I just can't get on board with digital guages when the regular guages have worked fine for me for decades. Maybe if they lowered the price I could be swayed.

Compressor system has more refrigerant - it does not have much power to compress to high pressure.

You have to charge r410 in liquid form

@@soloryderrr nope, not in the suction line( cold vapor) , youll over heat the pump

Oh? So how do you do it then? Add to the high side? Lol

www.hunker.com/12001960/how-to-add-r-410-refrigerant

@@soloryderrr you need to learn more and harder. So you understand how this system works.

It was close enough

it can be connected by bluetooth to android

It's about 350 to 375