How to Combine Capacitors
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- Опубліковано 6 чер 2019
- How to combine capacitors in parallel, in series, how to combine multiple run capacitors into one dual capacitor, and everything else related to that. If you find yourself in a situation where you don't have the right size capacitor, knowing the art of capacitor combination can help you out. I forgot to mention it in the video but many techs say that as long as a new dual capacitor is within 20% of the old capacitor's rating, you can use it for that unit.. So you could replace a 45/5 with a 50/5. I do that sometimes but I like to order the right size capacitor and come back later to swap them out. If possible, it's better to have the right size capacitor in there. Otherwise next time another tech will come out and might put in a 55/5 capacitor thinking that he is only 5 uF off..
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This video is for educational purposes. All appliance and HVAC repair work should be done by a trained professional. Word of Advice TV is not responsible for any possible damages or injuries caused by the use or misuse of the provided information.
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🔋 Capacitor Videos For Further Info:
Original Video on Replacing a Capacitor: ua-cam.com/video/C82HvbvP08E/v-deo.html
How to Replace a Capacitor Full Guide: ua-cam.com/video/9ZGfvC-PMWU/v-deo.html
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How to Replace a Start Capacitor: ua-cam.com/video/hC0nFT1XPcI/v-deo.html
How to Discharge a Capacitor: ua-cam.com/video/45oZXnClMD0/v-deo.html
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This saved me today. After the big heat wave locally, all the suppliers were out of the capacitor I needed. I said, OK, tell me what you do have. Then I selected several available capacitors to make up the right combination for my AC unit.
Gawd you must be in GA because this HEAT is unreal !
@@michaeljohn8905 Nope, Pacific Northwest, but we are sweltering again this year.
This is a great tutorial and I share it with customers often when the correct capacitor isn't available and this scenario will work. So, thank you for putting this tutorial together. My only feedback is you're only mentioning the compressor with your L2 and L1 leads, etc. The compressor isn't feeding voltage to the capacitor, the definite purpose contactor is doing so... Hopefully, this minor detail isn't a head-scratcher for your audience.
Make it a great day and be safe out there!
Outstanding tutorial, I have a blown speaker capacitor without an exact replacement, but I have loads of other sizes. Great to hear it is possible to combine, mix and match to get the uF required. And the mathematical formula is a bonus to resolve the issue. God Bless.
Hey Jay, thanks for this video. I've been in service for only 2 years and this info will be very beneficial to me in the field.👍
Great! Hopefully the info will come in useful for you! Stay cool ;)
Great vid sir!!! One Quick tip is that when combining capacitors in series (unequal denominations)your final combination number will always be lower than your lowest capacitors rating. Keep up the great work
I learn so much with you that I've become a addicted to your videos lol, I have gained a lot of confidence in myself doing this trade because of you
I really appreciate these videos I'm doing a co-op at a HVAC company and these videos really help me understand whats going on at work
Glad to hear that! Thank you for commenting! :)
I did not know any of this. Thanks Jay! Now we need a remedy for mosquitoe bites. They are bad here in TX!
Glad I could show you something interesting! :) I tend to stick to more basic videos but once in a while something like this is good too. And I agree! Mosquitoes are quite the pestilence.. Throw in some horse flies and your AC repair becomes highly unpleasant...
The series method also doubles the available voltage, not that it would be needed, but it would last longer putting half the voltage on each cap.
Your comments are always appreciated! Thank you for sharing your wisdom! :)
Exactly what I was looking for. Thank you!
I'm currently in HVAC school. Thanks for all the informative videos they're really helpful
Glad to hear they're helping! Good luck with school and career! :)
Crystal clear explanation! Thank you Jay!
Glad I could help! Thank you for watching!
Thank you this was very helpful!
Very nice technic if no other choice to replace capacitor thanks for sharing sir
Excellent my friend!! GREAT VIDEO and presentation... 5 Stars plus!!
Thank you!! Can't tell you how much you helped me big time!! Great video!!
Thanks Jay, this video is very helpful. Cheers,
You're on the money sir.. thanks!!
You're really good heat and air man I really love your videos I really help out a lot keep up the good work man
Not only when you run them in series the uF goes down, but you increase the capable voltage. So if you had 2) 10uF 50v caps and you need a 5uF 100v then you would run the 2) 10uF 50v caps in series,
I can see doing this to get someone up in the field that has a need to be up fast. I would also like to see a revisit on company time and paid by the company to put the proper Cap in place. It is quite possible and actually probable that the parallel method would last longer but it is all dependent on wiring especially and other factors. Better to have one piece in place that might fail as apposed to two; one that may be perfectly good and one that may fail shortly after installation and we all know as a near DOA product. Limiting the chain to one takes allot out of the equation. BTW, thumbs up for the idea.
Thank you👍is going to help a lot at my work
Love it, thank you for this useful video
Very informative, thank you
Great burn tip
The evaporation of the alcohol would help take the heat out and kill any infection before it can start. 👍👍
So helpful. Thanks.
Very good job 👍
It’s funny. I have had trouble with understanding series and parallel. Thank you for making it easy
👍👍👍
Good information
I love your videos make more please.
I can't thank you enough for this.
How do you know which wires are common coming out of the compressor and fan motor? Thanks for the info!.
Thank you very much!
good video, thanks for making it...
Very useful
Good informative video. I think capacitor(s) that are separated will outlast a dual run capacitor they won't heat up as much. Something every HVAC guy should keep in his truck is a few AmRad multi tap capacitors. And maybe a 70/10 or if you have the turbo 200X you won't need to worry. Yeah they're more expensive but there's room for it in the budget with the average price to go out and change a capacitor on a heat pump and maybe swap out a contactor for not much extra.
Wow nice nice thank you for this video
I wish I working with you I would learn so much more from you than with my company
Glad I could help you learn some stuff! :)
What gauge wire is used for the jumpers. Thanks
it is leaking form the drip pan can the pan be fixed?
I wasn’t sure to take your “burn remedy” to serious because I was waiting for you to tell us it was a joke or something 😂
Haha sorry about that. That is a legit remedy, I don't always have a lame joke at the end ;)
Hi Jay! Would 2 caps in parallel last longer in my 2 1/2 ton heat pump? 145-175 MFD. I'm tired of changing them.
How do you identify the polarity of the microwave capacitor?
So just out of curiosity, if you do HVAC work, how often do you combine capacitors? Or do you prefer not to? (why not?)
Prefer not to but I don't carry every single one. There is a cap that you create almost any combination under 70 microfarads.
I needed 45/5 capacitor and the shop gave me 40/5 and 5/5 and it's been working like a charm.
Oye, Professor! Do you do exclusively residential HVAC? Would love to see some tutorials on refrigeration. I’m an Operating Engineer who’s switching vocations in “midstream”, and I love the way you present your content. It’s almost a catharsis for me now.
Great video, so let’s say you have a dual cap. 40/5 and you need a 40/7.5?
Great video. Learning a lot. Where can I find those cap jumper wires? Can you share the link?
I actually made those myself right before filming the video :) Just pieces of white wire with insulated crimp on connectors. I don't think they sell jumper wires like that. Only alligator jumpers like these: amzn.to/2JcJGcU
Neat stuff! Now i need you to show and explain the add on hard start "kickstarter” capacitors... i have a 23 year old a/c where the compressor often doesn't want kick in when it gets hot outside.. here in south florida.. 91° today! Sometimes the compressor will kick in around two minutes after i hear the fan kick on, and sometimes the compressor won't go until i turn the system off for 15-20 minutes and then turn it back on... any suggestions? Do you think a hard start kit would help? Thnx, Don in Boynton Beach...
Putting in a hard start kit would definitely be worth a shot. I have a video on how to install a hard start kit. It's actually very easy.
Information galore. I wonder how many people in my park have their golf cart batteries wired wrong...Anyway thanks
for all this info... I can’t wait till my a/c breaks down so I can fix it...wait, just kidding...
thank you :D
I just replaced a fan motor on a 43 year old condensor. The new one had two wires come out of the motor for the capacitor. I just added a cap because it was a different rated one than the original fuel cap. It got me thinking if I wanted to run with a duel cap I would need to use an ohmmeter to find which of the two wires coming out of the motor would be going into motor and which one should be the common. ?
The other odd thing on this unit, it had a mallory capacitor which I assume to be a split cap. It was connected only to the herm. But it had two wires connected to the outer terminals from the same lug on the contactor and the middle wire went to the start winding on the compressor. It was a 15-10 mfd cap.
Could I just use an old orange wire (or brown or black) from a hard start kit (that is disconnected) and use that as a “jumper wire”?
so if you wirea capacitor in series , what will you do with the two ends ? just leave it there hanging or you can tie them together?
Very good video. Learned a lot that I did not know. At 10:30, you are combing 2 caps to one.
Why would you put 2 wires to the common leg. Get rid of one them.
Thanks for your video.
Does it matter which side of the cap is connected to the next cap terminal? Kind of polarity that they show like straight line and curved line in schematic.
Hey Mike! No, the polarity does not matter with capacitors.
@@WordofAdviceTV
Thanks for response.
So why they put the straight and curved sign on schematic or does it matter I swap the yellow[herm] wire with the common terminal wire?
@@mikeautostudent5562 That is the symbol for capacitance. (MFD) Sorry, I thought you were talking about a regular run capacitor. With a dual run capacitor it does matter where the wire goes. The herm wire will always be hooked up to the run winding so you can't swap that with the common.
@@WordofAdviceTV so does it matter polarity in this case bcz common is the other terminal side of capacitor for compressor.
Hey Jay, great videos bro. Here’s a major request from me. Can you please make a video on how to read the wiring schematic off of a condensing unit? That’ll be super helpful
Hi George! I will try to take some pictures of a few condenser wiring diagrams and do just that. Thanks for the suggestion!
Thanks bro, I’m really excited to see what you come up with, your videos are super helpful and useful for me. Thanks again.
Using the formula (C₁ × C₂) / (C₁ + C₂), we can see that as long as the two capacitors are identical, wiring them in series will always halve their value: For any positive value x, (x · x) / (x + x) = x² / 2x = x/2.
If I have 5 caps rated at 2.7 volts and one cap rated at 200 volts and I hook them up in a series what is the total volts this can store? 15.2 volts safely?
are the 3 terminals of Herm, Fan, Common always placed in clockwise order on top of a capacitor? Also if just the top of a capacitor looks brown (rust, no liquid) with the rest of the can all silver is that considered normal or a sign of damage?
The only way to know for sure if it is bad or not would be to test the capacitor with a meter. And to be honest I have never paid attention in which order, going clockwise, the terminal sections are since they are always labeled.. So I don't have a good answer for that
First ,thanks a lot for your videos .I have a question, maybe could be the topic for another interesting video. How to know what capacitor you need if all the information on the old one are gone?Thanks in advance.
Sometimes the compressor label will say what size capacitor it requires. But the easiest way is to call an appliance parts store, give them the model and serial of your unit, and ask them if they sell a capacitor that fits that unit. They will do the looking up for you :)
So how much will you charge de customer? For one cap or two caps?
a/c unit leaking water inside it is not the condensate drain i check it
amaizing!!!!
Hello,
I have carrier AC with the model #38CKC030-340. When I check the replacement capacitor, I found two. One is Dual run capacitor round 440 V 35/5 uF and the other is dual capacitor. 370 VAC 45 + 5 MFD. Which one should I buy? Thankyou
The best way would be to open the unit and visually verify what capacitor you have in there.
What about the voltage rating? Let’s say we connect in parallel two capacitors. Then the voltage rating of such configuration/combination will be the smallest voltage rating of the individual capacitors, right? To make sure we don’t blow it up.
Yes, the applied voltage should not exceed the lowest voltage rating..
Hey Jay! My heat pump is tripping the breaker when it is already running. Could a bad capacitor be causing this? What else could it be?
Thanks!
You got a short maybe a bad compressor call a tech
@@drodriguez394 Hi, Got it fixed a couple days after asking back last year, lol. Thanks for the suggestion though! It was very helpful!
What's a herm?
Prolly might have helped to let us know what’s pos. And what’s neg.
I used a littl deduction but im
MHO it might help a little.
I know everyone’s a critic. Lol
Sorry.
Thanks for making this video btw. Good stuff !
How do you find the common side of the contractor when you check a defrost board
Follow the schematic.
Ok
What if you have 5 capacitors and 9vlt battery and a twinkie?
You may end up going to the future ;)
Sounds like break time. Don't forget to hydrate !
Will combing capacitors in series increase their life expectancy? Assuming the combination results in the proper capacitance for the system
Awesome
I had a problem with my fan not running so I replaced the capacitor and it started right up…. But then I noticed the fan stopped running again and I could here the humming of the compressor….. dose that mean the fan is about to die
What am I missing? Watched this several times. Looks like series and parallel were wired the same.
I once was told to just add a 5 mfd for the fan to the 40/5 mfd dual when the 5 went bad.
Not sure how it ran at all for the time it did.
Not sure now exactly how I wired it now.
Would like to see a demonstration.
It ran for a good while until the drain pan under the air handler gave way and flooded. :(
I also replaced the board when I saw what appeared to be a burnt area around a diode or whatever it was. Got heat working but not air.
I checked a little while back and the 49 mfd is weak. It only shows like 36 mfds.
thanks bud i needed a formula on the fly not some decimal to fraction bla bla bla etc etc this formula for caps in series is perfect
Sunday hottest day in Texas of course my start capacitor goes out last night. I have six 370 volt AC run capacitors combined for a temporary start capacitor until tomorrow when I can get a replacement
i belive you made a mistake that yellow wire you took from l1 does not go to the herm on the capacitor. the Start winding on the compressor goes directly to the herm
Doubling up on Capacitors usually means there a problem else where, What is Happening is there is excessive current Draw in startup of a Fan Motor and least likely a AC pump, Make sure capacitor is held Firmly by putting factory clamp around capacitor to frame of unit and it will stay cool for years to come, When removing old capacitors always make sure they are discharged before handling as even a defective one can cause serious harm or death, Always do a Thorough Check of your components before replacing parts other wise you are going to waste time and Money, Stay Cool.
Sorry but I would take advice from somebody that would force open a pressure cooker. The key is to cool the skin IMMEDIATELY, grab a gallon of milk or anything in fridge and pour it all over. Forget trying to find rubbing alcohol. A lot of skin damage occurs after the initial burn, the skin continues to "cook" in the seconds right after. So a 3rd degree burn can be reduced to a 1st by cooling immediately with whatever is available including jumping in the snow.
I agree. Immediate application of cold is the best way to minimize the skin damage from burns.
Tenk
👍
Thanks for the video, but you forgot to mention polarity at the beginning with a series setup. + to + ( - to -) As parallel would be + to -, etc.
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This is wrong
Wires should be Chris crossed.
confusing
Very good job 👍
Thank you !