Charging Refrigerant: Step by Step Procedure to Check a R-410a Charge in an Outdoor AC unit

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This is how to check the charge on an outdoor condenser using the subcooling process. We take the Saturation temperature found on the high side of the gauge minus the actual temperature of the line to read the subcooling of the refrigerant in the liquid form.
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Комментарии : 122

@acservicetechchannel 7 лет назад

Our Inverter Mini Split Resources: Mini Split Book on Our Website- www.acservicetech.com/mini-split-book Mini Split Paperback on Amazon- amzn.to/3ytHJSs Mini Split Paperback on TruTech Tools- www.trutechtools.com/BooksGuides?aff=8 Mini Split E-Book on Google- play.google.com/store/books/details?id=HN-iEAAAQBAJ Mini Split E-Book on Apple- books.apple.com/us/book/id6445178399 Our Single Speed and Two Speed Air Conditioning Resources: My Paperback and E-Book: www.acservicetech.com/the-book My Paperback: www.amazon.com/shop/acservicetech Read the book reviews on Amazon! Check out our new Articles at www.acservicetech.com/articles Support the Channel by purchasing tools through Tru Tech Tools! Use this link www.trutechtools.com/?Aff=8 Save 8% at checkout using code "acservicetech" Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos- amzn.to/2aenwTq Here is a link to Refrigerant hoses with valves used in the videos- amzn.to/2aBumVI Here is a link to the UEI DL389 Multimeter used in the videos- amzn.to/2xAdaJf Here is a link to the Imperial 535-C Kwik Charge Vaporizer for Charging Refrigerant- amzn.to/2wFHtBW Here is the link to the Fieldpiece ST4 Dual Temp Meter- amzn.to/2wc1ME3 Here is a link to the Digital Refrigerant Scale used in the videos- amzn.to/2b9oXYl Other tool links can be found in the video description section. ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. Check out other videos on the HVACR topics of interest at- ru-vid.com/show-UCOZR-1IqsAer9wzlvFgb4mAplaylists?view_as=public

@elijah4242 7 лет назад

The best HVAC Channel on RU-vid. Very helpful and great HVAC troubleshooting skills, tips & training 👍🏽👍🏽👍🏽👍🏽👍🏽!

@acservicetechchannel 7 лет назад

Thank you very much Elijah!

@fortinosuarez7962 5 лет назад

You the best teacher on HVAC field. Thanks. God bless you.

@acservicetechchannel 5 лет назад

Thank you and May the Lord Bless you too!

@josemares1439 5 лет назад

Great refresher videos been out of school 5 years and don't really work on a.c.'s much...thanks

@acservicetechchannel 5 лет назад

Thanks Jose!

@acservicetechchannel 8 лет назад

Thanks for the great questions! On Comfort Cooling systems, Target Subcooling is usually found to be between 8-12 degrees but I have seen it at 7 and I have seen it as high as 17 on the rating plate. You look at the rating plate of the unit you are checking the charge on. As far as the target superheat is concerned, it will vary depending upon the humidity and temperature inside and the temperature outside. Check out this video for more on Checking Superheat and Finding the Target Superheat ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5uqtiUmrBLg.html

@coolramone 4 года назад

Hey Craig, how do you charge a two stage condenser system?

@PjPjPaul 7 лет назад

I really appreciate these videos!

@acservicetechchannel 7 лет назад

Thanks PjPjPaul!

@acservicetechchannel 8 лет назад

As long as the system that you are trying to charge is for comfort cooling and as long as the system has a thermostatic expansion valve (txv) and it's at least 65 degrees outside or more then you can use the subcooling process addressed in this video regardless of whether it's R-410A or R-22. You can charge a heat pump in cooling mode this way too if it has a txv. If in front of the evaporator coil there is a piston/orifice or capillary tube then you would use the superheat charging process. Please feel free to check out my channel which will show you real time charging of R-22 systems and how to figure out how much charge to add in a heat pump in winter. Feel free to SUBSCRIBE as I come out with new videos every few days. Continue to ask the important questions. Thanks!ru-vid.com/show-UCOZR-1IqsAer9wzlvFgb4mA

@acservicetechchannel 6 лет назад

If you want to support the ACSERVICETECH Channel and receive more HVAC Content, Correspond, or Collaborate on your endeavors- check out www.Patreon.com/acservicetech All of the ACSERVICETECH Playlists- ru-vid.com/show-UCOZR-1IqsAer9wzlvFgb4mAplaylists?view_as=public Submit your email to the ACSERVICETECH email updates list at info@acservicetech.com

@acservicetechchannel 7 лет назад

Check out other ACSERVICETECH videos on the HVACR topics of interest at- ru-vid.com/show-UCOZR-1IqsAer9wzlvFgb4mAplaylists?view_as=public

@nykid8849 6 лет назад

hello I watched your videos in past,i working on a Goodman 2ton unit,& my lowside was 125psi & highside was 285psi I was getting about 60supply air & 72 return air temperatures my suction pipe temp 72 so basically I was getting about 25degree superheat this is a fix metering device vacuumed & factory charged the other problem was that the return air was pulling from basement & not from the actual space,very little from space due to open returns with no return air duct so most return air was from basement what could be the issue I want to solve this problem any suggest would help thank

@jimmyung3212 7 лет назад

Thank you!!!

@acservicetechchannel 7 лет назад

Glad to help!

@killanige 8 лет назад

Is this a technique that can be used for other refrigerants besides 410a, maybe like r22? Also, does it matter if the unit is a heat pump or gas? Thanks for the videos good stuff!

@maxmera7007 5 лет назад

Thank you for your quick answer to my question, Today I have received the Book I’m learning hands on, I have a situation: evaporator coil is for 4 tons can we use a 5 tons condenser (mismatch) or what could be the margin .I will appreciate so much your advice.

@acservicetechchannel 5 лет назад

If a txv is used, it will at least function and you could run a high indoor blower speed to slightly compensate but it wont be as efficient due to the loss of capacity at the indoor unit, thanks Max and let me know what you think of the book!

@acservicetechchannel 8 лет назад

Great question! In the instruction manual of an inverter unit will be the charging procedures for those units. They are DIFFERENT than psc compressor units which is what is shown in this video and which are charged with superheat for piston units and subcooling for txv units in cooling mode. Normally Inverter Systems will have the proper amount of refrigerant in the unit already up to a certain amount of lineset feet and will be able to operate correctly with a wide range of refrigerant inside which it was designed for. There may not be a way on that unit to add the correct amount of refrigerant other than weighing in a certain amount of refrigerant per foot extra above the maximum rated length of lineset worth of refrigerant that the unit is presently holding. If there were a leak normally you will need to recover the refrigerant, find and fix the leak, vacuum it, and weigh in what is stated on the rating plate if you are under the maximum amount of lineset but make sure to follow the installation instructions of that particular manufacturer which is always your best bet. Thanks for the comment, and I hope you enjoyed the video!

@sivucit 7 лет назад

hi, i passed the EPA exam on 2009 and just that I didnot understand super heat and subcool i didnt proceed further. after 7 years i found your videos and it is mind blowing. Thanks much. without you i am no good. Can i use the recharge process that you said for minisplit AC as well both for txv and orfice or piston type.

@acservicetechchannel 7 лет назад

Thank you very much! Watch the subcooling and superheat playlists but these are used for single and two speed compressors only, subcooling if the unit has a txv and superheat for units with pistons or cap tubing as the metering device. VRF units would have to be done by weight unless the manufacturer prescribes a certain procedure, thanks! Check out other videos on the HVACR topics of interest at- ru-vid.com/show-UCOZR-1IqsAer9wzlvFgb4mAplaylists?view_as=public

@briancrane7634 8 лет назад

Great videos as always. Many thanks!! Quick question: did you edit out the footage of purging the lines before you added coolant don't see it here. Thanks again!

@acservicetechchannel 8 лет назад

Yes this video is just of checking the refrigerant charge. Thank you for the Comment!

@vemlacduong1954 8 лет назад

Thanks

@acservicetechchannel 8 лет назад

No problem, glad you enjoyed it!

@acestu 5 лет назад

Hi AC, do you have a video about charging an empty system explaining bomb charging etc ?

@acservicetechchannel 5 лет назад

here is a video on breaking the vacuum with refrigerant from the bottle, thanks- ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RA7BY7dixIg.html

@nidhal7184 6 лет назад

Dear Sir, Thank you very much for the vedio,,,, actually,,, i do appreciate if you may help me with this,,, i have atals Copco air dryer.... Its mulfunctionig due to gas leakage due to crack in Copper pipe,,, we fix the crack by brazing & then we charged with R410a,,, do we need to charge the gas in liquid form by up side down the vessel?? Thank you in advance,,,

@acservicetechchannel 6 лет назад

If the system is empty, after the system is pressure tested, vent the nitrogen to atmospheric pressure which is 0psig, then vacuum the system below 500 microns and do a standing vacuum test like what is seen in the "acservicetech vacuum playlist" then weigh the liquid refrigerant from a upside down bottle into the liquid side while the unit is off up to the amount of pounds stated on the rating plate of the unit or a little less. Then start the unit up and check the charge with either superheat or subcooling as needed. That playlist will show how I do it, thanks!

@CVD-di1xn 8 лет назад

There is no doubt that 410A is a difficult refrigerant to work with. Case in point. A Fieldpiece 360, calculated the Superheat (Fixed Orfice) to be 14.7. I calculated the WB /DB Superheat to be 14.5. Close enough. After adjusting the refrigerant and letting the system settlle down (waited for over 1 hour), I measured the Superheat at 14.5 . This was great !!! After returning 7 hours latter and in the hot of the day (85 degrees), the newly calculated Superheat was 19. I measured 7.7. The system produces very good cold air and the vapor line (at the condensor) sweats. The pressures were 117 and 335 lbs. Now I'm suffering..... Your Thoughts Please

@acservicetechchannel 8 лет назад

Thanks for the Great Question! So here is my question, if the system was running throughout the day and just say the wb temp inside the house stayed the same but the temp went up outside then the target superheat reading should have gone down, not up. Just say the temp went up 15 degrees outside, for the target superheat to actually go up instead of down then the wb in the house would have to go up by 8 degrees and that wouldn't happen unless the system was very undersized and definitely could not handle the load. I don't know what your starting and ending outdoor temp and indoor wet bulbs were. The best thing I can say is too just look at a superheat chart and study it, then think about the situation. I Hope that helps! Thanks for your Questions and Thumbs Up!My next question was going to be if you were adding refrigerant then how much refrigerant was put in and how fast was it put in but the first thought above takes precedent. Thanks for the Comment!

@livefullest5439 6 лет назад

Hi, I was looking for charging refrigetant in a ductless minisplit that has only one service port available. Can you please upload a video for that.

@acservicetechchannel 6 лет назад

Thanks for letting me know what you would like to see Lukas. We usually use the "total weight method" for vrf mini splits, thanks!

@iamdjev8346 8 лет назад

what is the ideaL subcooL for R410A? and ideaL superheat in R-22? anyways thanks for the great video.

@purrungas2012 8 лет назад

does the ambient temperature makes a difference in the charging procedure? how? thanks... very nice video, thanks

@acservicetechchannel 8 лет назад

Thanks for the Great Question! The manufacturer gives you one subcooling amount that they want you to obtain under normal outside temperatures regardless if the ambient temperature were say 20 degrees different from one day to another with a lower threshold of having to be 70 degrees outside. This does matter in the superheat charging process where you need to find the outside temp and the wet bulb temp inside. Check out my Superheat charging playlist to see that.--------ru-vid.com/group/PLxnHR5_D2ojwGvhU1rseXQLJ-XBjBZMMk

@maxmera7007 5 лет назад

I have a question, which method we use to charge a system (heat pump) that has two meter devices like piston outside in the condenser and TXV indoor at the evaporator

@acservicetechchannel 5 лет назад

Use the subcooling method in cooling mode and/or another manufacturer prescribed method listed in the model's literature. The txv will be active in cooling mode so we use subcooling, thanks!

@ddcws1 7 лет назад

I try to ask questions in videos that are related to what I am asking but couldn't find one so I will just post one here. My question is if a new unit is installed that has a TXV the inside is about 90 degrees can I charge normally? I am thinking because inside is very hot I wouldn't get an accurate subcool charge. I would think as temp goes down the the liquid line temp and the liquid line pressure would separate more. Hope I made sense. Thanks!

@acservicetechchannel 7 лет назад

Actually, it will be ok because the txv will meter more refrigerant as needed to remove heat from the building and the subcooling liquid temp will do with the liquid temp and coil condition outside. If you were to be cautious, you could charge up to a couple degrees below the target subcooling needed and then wait for the drop in the inside and then continue checking. This will give you the answer you are looking for, thanks

@ddcws1 7 лет назад

acservicetech thanks

@Georgatzis 8 лет назад

I have a question ! Supose I have a system that works with 410A refrigerant and i like to convert it to R290, how much will the gauge show ( PSI or bar ) when then compressor is off ! I supose that you can refill the system even if the system is off ? 2. And how much must the system show if i refill it with R290 when it run s with R22 ? ( the system is off ) The temperature is 30C

@acservicetechchannel 8 лет назад

You can weigh in liquid refrigerant into the liquid line with the system off after the system has been vacuumed down to 500 microns and has held. This way you are able to get the correct poundage in before pressure is exerted by the vapor.Pressure is exerted by the vapor and when the refrigerant is in saturated state and has a chance to reach an equilibrium. Then the pressure will depend on the average temperature of the unit that the refrigerant is in with the unit off so is not really a pressure you are looking for but a weight. Please be aware of whatever codes are in your area as I am not sure what the unit is for that you are referring to but there could be codes that would not support putting propane R290 into the unit as a refrigerant but you would have to check with that as well as any and all potential hazards which would come first.I would get some more experience under your belt before working with this and I will not advise on putting any other refrigerant other than the one that the manufacturer has on the rating plate. Thank you for your comment though!

@mark.r8900 5 лет назад

hi, please help. i was working on a new 2.5ton Carrier with TXV. suction pressure (130psig) and high side pressure of (275psig). But why am i getting only 3deg subcooling and 30deg superheat? wouldn't the low side and high side pressures be low if there's a leak? can it be an airflow problem? thank you.

@acservicetechchannel 5 лет назад

They may be high due to the indoor heat load being high, the outdoor temp being high or the outdoor condenser seer rating being low, thanks!

@wowcolors 6 лет назад

How do you charge without the kwick charge unit? Do you charge with the compressor off or into the low side?

@acservicetechchannel 6 лет назад

Still into the low side but just be more careful and do smaller bursts into the low side while the compressor is running, thanks

@gee2676 7 лет назад

great video, good job... not a big deal or nothing, just throwing it out there but 73 - 66 = 7... not 6

@acservicetechchannel 7 лет назад

Thank you, I am glad you enjoyed the video. Don't you hate that when you think one thing and say another. I was teaching last night and after the whole day of teaching and another three hours of night teaching, I had to pause and ask hey did I just say this because that is what I meant! Thank you very much!

@sohailmukhtarabbasi1448 8 лет назад

hai, i am using panasonic 1 ton inveter split ac having R410a in it , can u tell me what will be the ideal suction pressure and a discharge pressure for R410a system.also for R22 system what will be the ideal suction presssure and discharge pressure.your help will e highly appriciated

@zahidmalik2223 8 лет назад

R 410 will be 110 and r22 will be 60

@abbasikanwal9569 8 лет назад

thanks bro

@malasakitsabayanpilipinas1578 5 лет назад

how can you get the saturated temp of low & high side if the compressor suction and discharge line is inclosed.there is no way to clamp up your thermo coupler becoz if you open the condensing door it will trip due to high pressure.

@acservicetechchannel 5 лет назад

You need to attach your temp sensors on while the system is off. Then seal the door as best you can and turn the system on to get your readings, thanks!

@mpugliano 8 лет назад

Where did you get your inline Vaporizer? I haven't seen one before.

@acservicetechchannel 8 лет назад

Thanks for the Great Question! The vaporizer used in the videos is a KWIK CHARGE Cat # 535-C. I am very pleased with these! imperial-tools.com/content/535-c-kwik-charge%C2%AE

@ChoclateMilk21 6 лет назад

If you don't turn the gas bottle upside down won't it charge in vapor anyway,thus eliminating the voporizer? Or why is it necessary to turn the gas bottle upside down when charging? Thanks

@charlesfatz7521 6 лет назад

Should I be using a vaporizer for charging any type of freon? (MO99, 410a, etc)

@acservicetechchannel 6 лет назад

It certainly would work for any refrigerant. It is just an extra safety to make sure that not too much liquid refrigerant is added into the system going into the compressor too fast,. You can also do it without it by just turning the valves slightly open and then closed quickly, thanks!

@charlesfatz7521 6 лет назад

Thank you, Craig.

@acservicetechchannel 6 лет назад

Glad to help Charles!

@ragu8914 8 лет назад

hey boss question for you. So 410a unit second floor. Should it not be able to stay in the 70º degree range with only 4 to 6 subcool?

@acservicetechchannel 8 лет назад

It could stay 70 degrees inside the building with only 4 to 6 degrees of subcooling. It is meant for the hot days when the txv is not holding back much liquid when the unit needs the 8 or 12 degree of subcooling it is calling for. Thanks for the question!

@ragu8914 8 лет назад

+acservicetech yes well it's struggling to stay in 75 to 79 running all night gots to be low on pepto

@acservicetechchannel 8 лет назад

Have you replaced the filter? Is the temp difference between the supply and return 18-21 degrees or lower? If it is lower than I would get the charge to the specified subcooling found on the rating plate and then check the temp diff again.

@ragu8914 8 лет назад

+acservicetech Took filter out & heading way way way out there for free again. Will check the split. Didn't check dryer or txv cause I figure it would show up on my gauges. Our pressures are almost identical to the ones on your video thumbnail except my suction is higher. Thanks for replying boss awesome of you.

@acservicetechchannel 8 лет назад

If suction is high then it is likely not the txv because if the txv was more closed then the low pressure side would be lower than expected. If you thought it was the txv because you don't have 18-21 then you could put the bulb in hot water and see if the txv opens. However if you do have your correct 18-21 then you may want to look at their building envelope or the system may be too small for the building. Good luck

@Jo-Sachs 7 лет назад

I'm new to the business, I might be wrong , but isn't the TXV designed to maintain a constant superheat? Wouldn't be right to check the superheat, and based on the superheat reading determine if the system is properly charged? As well , how about the target range? Isn't the subcooling on the nameplate designed to be 10 degrees at 90 F outdoor and 75F indoor temperature? What are the temperatures outside and inside when you are taking the reading? Please reply to me, I want to make sure I understand what I'm studying. ( I'm still a student, just past my EPA)

@acservicetechchannel 7 лет назад

Great questions! Glad to hear you just passed the EPA. For the most part, the target subcooling listed on the outdoor rating plate will not change you should try to get the subcooling as close to that as you can or 1-2 degrees higher just for future loss from techs connecting and disconnecting. In the case of a txv after checking subcooling and if this is correct or higher than it should be then you would check superheat. You can check the superheat with the bulb off the line too in cold water to lessen the superheat to allow less refrigerant through which would increase superheat or put the bulb in hot water to add alot of refrigerant through to lower the superheat. If the txv does not act accordingly then it may have lost its charge or there may be a restriction in it or befroe it if high superheat but the coil is starting to freeze. For superheat you want the indoor wb and the outdoor temp to find the target superheat. Check some of these videos out, thanks- ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-q-G7FLlzhAg.html -- ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-bIL9BrKCujc.html -- ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qqLwE7Kbyaw.html

@acservicetechchannel 7 лет назад

We are talking about air conditioning not refrigeration in this case, thanks

@Jo-Sachs 7 лет назад

Thank you,

@billybassman21 7 лет назад

In my experience the high side is normally over 300 psi on 410. Why was it so low here? Was it because it was cold outside or is it just how this unit runs?

@acservicetechchannel 7 лет назад

The higher the seer the lower the pressure so if there is more coil then the unit can reject heat better. This was 16 seer and fairly newer so the fins were in good shape. I don't remember the outdoor temp that day. What you are describing is probably 13 seer units. This is why it is so important to use subcooling and superheat. Thanks for your question billybassman21!

@Wan7940 7 лет назад

can we charge directly without using the kwik? thanks

@acservicetechchannel 7 лет назад

Yes but you really have to meter it in much slower in order for some of the phase change to occur so that you don't have liquid going into the compressor. Thanks

@Manteego25 6 лет назад

Explain why you are charging on the vapor side?

@acservicetechchannel 6 лет назад

Hey Terry, while the system is running, the vapor side is lower pressure than the bottle and the liquid side is higher pressure than the bottle so if you are trying to add refrigerant from the bottle into the unit then it has to go into the vapor side of the running system, thanks

@ci8158 5 лет назад

is that on a txv or orifice regulated coil?

@acservicetechchannel 5 лет назад

Hey C I, Subcooling is used on systems with a TXV and total superheat is used on systems that have a fixed orifice, thanks!

@runningcoyote3897 5 лет назад

Is it okay to charge 410a as a vapor even if it's a blended refrigerant?

@acservicetechchannel 5 лет назад

It has to come out of the bottle as a liquid to keep the proper mix, thanks

@runningcoyote3897 5 лет назад

@@acservicetechchannel thanks!!

@etr1112001 8 лет назад

我我很喜歡看可以學好多

@acservicetechchannel 8 лет назад

Thanks!

@quivera86heights 7 лет назад

Are we supposed to be using a liquid vaporizer?

@acservicetechchannel 7 лет назад

It is not a complete necessity but it makes charging safer and faster for the compressor. I have been using this for years and I really like that I don't hear any compressor noises while charging as that would be liquid in the compressor. You can get away without it but to do it right without it seems to just take too long because you can only put a tiny amount in each time. Thanks - Here is a link to the Imperial 535-C Kwik Charge Vaporizer for Charging Refrigerant if you wanted- amzn.to/2oge0u9

@mostlypeacefulpatriot8682 7 лет назад

Have you ever heard of getting a shock if the refrigeration valve isn't open fully causing friction from the Freon?

@acservicetechchannel 7 лет назад

Are you talking about a liquid hammer if the liquid refrigerant suddenly stop such as at a solenoid valve? Are you taking about the service valve on the unit and refrigerant having to go through a partially open valve and the pressure reduction that would occur due to the increased friction of a smaller entrance? If you lower pressure then temperature would follow and lower the temp on the other side of the obstruction.

@mostlypeacefulpatriot8682 7 лет назад

Shock occurs from charging from a virgin refrigerant tank into a condensing unit. This slight shock will occasionally turn off the weigh scale.

@hjlosada 6 лет назад

My system is 410a strait cool . my high side is reading 124 in the pink line and the temperature on the high side is 92 and it calls for 10 degree of super heat. Do It need to ad or remove freeon. Temperature coming out of air handler is 64 degrees outside air temperature is 96 degrees

@acservicetechchannel 6 лет назад

So you would use superheat for a system with a piston as an orifice and subcooling for a system with a txv. For superheat you need actual temp on the large line which is the low side and low side sat temp on the gauge in pink, Superheat=actual temp-sat temp in the pink on the gauge, Subcooling=Sat temp of small liquid line-actual temp small liquid line.

@danlosada898 6 лет назад

This system is equipped with a TXV valve, and it calls for a 10 degree sub-cooling.

@Tech-Diesel 6 лет назад

Gjohny yes papa

@Bobby8451 7 лет назад

My low side reads 100psi and my high side reads 300psi, what does this tell you, undercharge? Quick response would be awesome cause I'm in the process of charging. Thanx

@acservicetechchannel 7 лет назад

What refrigerant are you working with r410a or another? If it is r410a then it looks like low on refrigerant, low airflow or liquid restriction. You would need to use the subcooling process if txv and superheat if piston, check the playlists thanks- ru-vid.com_all_playlists

@Bobby8451 7 лет назад

acservicetech Awesome thanx for the quick response, I'm using 410a and I believe it's not txv, it's fixed I believe. It's says on condenser, indoor txv subcooling 14°. 70 piston indoor and 57 piston outdoor whatever that means.

@acservicetechchannel 7 лет назад

You can verify if it is a piston if it does not say txv on the cover of the evap or you do not see one. Usually you would see a small brass nut. That is the orifice chamber. You need to find target superheat- here is the superheat playlist along with the target superheat chart in the playlist- ru-vid.com/group/PLxnHR5_D2ojwGvhU1rseXQLJ-XBjBZMMk

@Bobby8451 7 лет назад

acservicetech Thanx man I really appreciate ur help, that's awesome!

@Bobby8451 7 лет назад

acservicetech I got no choice but to sub, yhanx!

@shandusa 5 лет назад

73 degrees minus 66 degrees is 7 degrees, am I missing something?

@acservicetechchannel 5 лет назад

That would be 7 degrees of subcooling. You would compare this to the target subcooling on the outdoor unit rating place, thanks!

@tigerz4487 5 лет назад

I see your face,bro:))

@acservicetechchannel 5 лет назад

Yeah I started showing it every once in a while. Hopefully no one will loose their appetite, ha ha!

@roger3858 9 месяцев назад

They use the same copper and the same gauges… so there is that

@Mr51Caveman 7 лет назад

My AC is broke AGAIN!!! I have had this Tappan Heat Pump unit worked on about every 3 to 6 months for 5 years now. (the unit is 9 yrs old) The compressor, the blower motor, the capacitor, the relay, the A frame (all REPLACED!) and more than 3 times the refrigerant has been serviced! This last incident occurred just this last Feb 2017. Called for service cause we had no heat. Tech came out, put his gauges on and said we NO, NONE, NADA refrigerant. So he pumps in 15 pounds and charges me almost $1300.00. 24 hrs later its broke again. He comes back 4 days later and tells me theres a leak somewhere. ( 14 degrees outside...no heat) Really? ALL the refrigerant is gone again!!! So he does his thing and tells me the A frame in the attic has a seam tear so that's what leaked the refrigerant. Can't be fixed. So we have to replace it. Has to be ordered of course....so a few more days with no heat. Ok so it comes in and he replaces it and pumps about 11 pounds of refrigerant in. (Label on unit states "240 Ounces, my mat says that is 15 pounds.) Seems to have fixed the issue. Now the temp is up to about 90 degrees so we need AC. Fast forward to last week I noticed it wasn't shutting off so I go outside and see that the large line is completely frozen up. I call for service again. I shut the unit off. He comes out 3 days later and tells me that since I shut the unit off and it's not frozen there's nothing he can do. He says it was probably just a hiccup. Froze up again. I call him a couple days later and he states the relay is probably sticking. So I get on the Internet and find the exact relay. I ordered it, came in and I replaced it. So far so good. Anyway I turned the unit back on and it has run for over an hour. Temp was 77 degrees and I set it for 75. Still running. The temp came down to 75 BUT IT'S STILL RUNNING! I shut it off before the line can freeze up again. At this point I'm at the end of sanity. Why can't HVAC techs be honest? Or be trained properly? What have I got to do to fix this unit? I have a "Home Warranty" that seems to be almost useless. They charge me the service fee ( in addition to the refrigerant that has to be constantly pumped in!) and band aid my unit. Over and over again. Help!!!!!!!

@acservicetechchannel 7 лет назад

Wow, I am really sorry! My best advise to finding a good tech is by referrals or maybe finding and stopping in at the local hvacr supply houses in your area and asking them who they would recommend. If the tech asks to put refrigerant in and the system is empty or close to empty then it is not going to hold and tell them that you want them to use bubble leak detector, electronic leak detector, or dye. If the system is empty then the tech is to put nitrogen in, listen for noise and use the bubble leak detector. thanks and sorry you are not finding the right company!

@Mr51Caveman 7 лет назад

acservicetech The, I guess, biggest problem (besides poorly trained techs) is getting my warranty company to hire someone qualified and trained properly. Seems like they just keep soaking me. I served 24 years in the Air Force and did a bunch of time in some very hot places. I can't seem to handle heat anymore. Maybe I should move to Alaska or Iceland.......

@Mr51Caveman 7 лет назад

I have a second system that services my kitchen and dining room. It sweats. It cools. And it does it in about 15 minutes of running. This main unit is almost bone dry on the line and the compressor area. Unfortunately I don't have gauges or the refrigerant if it was low. 410 is what's supposed to be in it. From viewing lots of videos that may be the problem. From what I can gather. I can fix fighter jets.....AC units...not so much so!

@Mr51Caveman 7 лет назад

I'm just tired of messing with this system. And of being hot! I have my house up for sale and I want the unit fixed right. Not just because we need it to work properly but because it's the right thing to do. Military integrity and all......

@acservicetechchannel 7 лет назад

Many Technical High Schools have adult classes at night, sometimes such as a 10 week session on HVACR systems, thanks