HVAC Run Capacitors 3

[sampich1]

To Dr. Z

Thanks, I learn alot from watching your video.

[DrZarkloff]

@sampich1 Thanks for watching.

[GHOKO1234]

DR. Z can is it ok to replace a 40Mfd run cap to a 50Mfd both the same voltage and hertz... if not what would happen to my unit?

[DrZarkloff]

@GHOKO1234 You should not replace a 40 mfd with a 50 mfd. You can always go up in voltage but not down. Always keep the mfd rating the same.

[fsdanlie]

I worked on one that capacitor went out after 4 months cleaned condenser on unit 4 months ago .installed a new on 45/5/440 and checked voltage when running and got 462 volts on common and herm on run cap,compressor running just below rla condenser coil is corroded but to me it's a sign of compressor going out,they invested on a new system.What's your conclusion?

[DrZarkloff]

@fsdanlie Did you check to see if the compressor side of the run cap check out at 45uf? It sounds like the run cap might have been going bad.

[nylox2004]

The motor plate on my compressor doesn't say anything about the MFD requirements unfortunately. I believe its a 3.5 ton unit and the capacitor has gone bad. The old capacitor had a 40 MFD label. I purchased 3 different sizes just for curiosity purposes. A 35, 40, and a 45. I installed each of them and checked the amp draw on the common wire to the compressor and the amperage draw was almost an Amp lower on the 45uf vs the 40 or 35. Would this indicate running more efficiently?

[DrZarkloff]

@nylox2004 Yes. You might as well use the 45uf.

[rotman67]

can i replace a fan capacitor rated for 370 3 MicroF with a 440 5 MicroF ?

[DrZarkloff]

@rotman67 No. But you can replace the 3/370 with a 3/440.

[OregonDARRYL]

So... you can wire two in parallel - that ADD up to what you require, AS LONG AS both are rated at the proper or higher voltage..... Right?

[DrZarkloff]

@OregonDARRYL Yes.

[yantur52]

You realy good doing what u doing man thanks for all this for real.

[DrZarkloff]

@yantur52 Thanks for watching.

[sickbastard80]

dr. z,, i heard that if you have a capacitor that's say 30 and you also have a 10 and you need a 20 and you don't have  it,,, i heard that you can actually hook them up in series and somehow a 30 and a 10 hooked in series will produce a capacitance of 20 or less?? or more?? there's a mathematical formula too, do you know if that's true?? or could i blow up the compressor if i hook them in series to decrease the value of both capacitors in series... any idea??

[DrZarkloff]

@sickbastard80 Yes, just connect the 20 and the 10 in series to make a 30.

[ArtistBlade1972]

@sickbastard80 When you wire capacitors in series they add as reciprocals. 1/ 1/c1+ 1/c2...etc... If you wire a 30uf and a 10uf in series your total capacitance will be 7.5uf but the voltage rating will be the voltage rating of both capacitors combined. Remember, in series the total capacitance will ALWAYS be lower than the lowest value capacitor. You could wire two 40uf caps in series to get 20uf...

[Douglasisaacs]

Greetings Dr. Z,

You mentioned a Turbo 200 in this video. Could you elaborate on this is and it's uses?

[atcherservice1]

great bit of info Dr Z thanks for sharing

[kosukissa]

Hi, What is difference between capacitor like beginning this vid, o.40 sec, oval single, and round one, plastic covered capacitors available as run capacitors as well. Will it work if I put of course same uf, is it only difference what it looks like?

What happens if I put wrong volt reading capacitor to motor, if old is 400 and new is less- what happens, will it run or not or?

[dspqpsk]

Did these caps have a polarity? Were you connecting them accordingly? Basically the caps are wired in parallel with the compressor or blower? What would be the scenarios if one failed? I know in reality just get the right thing, is just interesting to know exactly how and why my/your trick works. Makes the path for even more tricks.

Thank you.

[ntudurof2]

Motor run capacitors use in the ac field do not have polarity. However,they always have two connection posts. If you are wiring them up in series like Z is here, one side of each (doesn't matter which) will become the common.

[sickbastard80]

@ntudurof2 actually i think dr. z hooked them electrically in paralell,, and all run capacitors do have some sort of polarity, it's not an electrical polarity, it's rather a SAFETY RELATED polarity. if you notice most non-dual run capacitors have a TERMINAL MARKED or notched. that's the terminal that's clossest to the casing of the capacitor, so that TERMINAL should be hooked to the line side, not start. should there be a short you don't want the short to ground through Start

[DrZarkloff]

The only run caps that have a common side are the dual run capacitors that are connected to both the compressor and the condensing fan motor, as they have three terminals. The run caps with only two terminals are not polarity sensitive.

[bass4pro]

thank you Dr Z,ill be getting a fieldpiece.

[bass4pro]

Dr.Z how well does the fieldpiece works?

[DrZarkloff]

I can only say good things about Fieldpiece.

[k9unitube]

does it matter which one you provide power to? wont the 5 mf blow up when it gets 20 mf if you connect the 20 mf to power supply first?

[DrZarkloff]

It's best to connect make the connection to the motor on the largest run cap.

[mikie2501]

Nice job, hey a green screen, going high tech vid on us! :>

[DrZarkloff]

Thanks. I bought Pinnacle Ultimate 12. Windows Movie Maker was a great, but now I can make the videos that I've been wanting to do.

[napais]

Thanks Dr. for the video. another thing from you in my bag from you, for technical knowledge and tricks, in case you need it.

I am looking forward for the video abour R22 going out and 410a coming in. have good day man.

[DrZarkloff]

Thanks. I'm still trying to think about what to say about the R22 phase out. Maybe I should be telling everyone to hurry up and buy a R22 system before the end of the year, because you won't be able to after Dec 31, 2009.

[waters65]

do you hook up to motor using the terminals from the same cap or 1 on each

[DrZarkloff]

Connect to the motor using one of the run capacitors.

[hvacman77]

good old piggy back Another great Video

[rolando7120]

good video. But lets say that its for the outside fan, would you hook up the black wire to the 15 microfarad capacitor or both?

[DrZarkloff]

It's best to connect the system to the larger run cap.

[DCAIRCONEXPRT]

Hey Doc have you ever heard of an adjustable EER?

[DrZarkloff]

Yes. EER is usually rated lower than the SEER.

[frausto77]

Excellent video! Very educational.

[DrZarkloff]

Thanks for watching.

[suprservtech]

good video

[DrZarkloff]

Thanks for watching.

[suprservtech]

5+15=10 hmmm 0:30-0:35 math is not our stong point

[DrZarkloff]

Thanks for bringing this to my attention.

[FieldpieceProducts]

Sweet Hat!!!

[DrZarkloff]

Thanks and thanks for the hat.

[bobbyton80]

good vid dr Z

[DrZarkloff]

Thanks.

[Darvin1964]

Learn somthing new every day

[DrZarkloff]

Thanks for watching.

[gunman50cal]

aka a temp fix right

[DrZarkloff]

That's what I like to think of it as. Some techs will just leave it as a permanent fix. It was great meeting you at ST3.

[V8Jagnut]

good vid but i would not be doing that.lol

[DrZarkloff]

Yeah, I'd only do it in a pinch.

[itscool1968]

stay cons? they are called quick disconnect connectors jim:)

[seanrwerner]

In the Doc's defense, Sta-Cons is just a brand of SOLDERLESS CONNECTORS if you wanna get technical.

Quick disconnects are usually in pneumatics or hydraulic systems.

Nonetheless, good morning Dr. I have been watching your stuff for awhile now and just figured I would comment quick for once.

Have a good day.

[DrZarkloff]

Thanks for watching.

[itscool1968]

i had to say this can you use a norman for a temp cap:)

[COOLIKEDATAZIAN]

Interesting.

[Brokenwings1962]

This paralleling caps trick has saved me plenty !! You should also mention seriesing caps together. Say you needed a 5MFD, you can series 2 10MFDs and get 5 MFD. Ive used that one a few times as well.... John

[DrZarkloff]

I've done that, too. Thanks.

[BigVOLdaddy]

man i used to HATE installing run capacitor when i was an HVAC tech...those dang things are so small, and can run so fast, i ALWAYS had a tough time catching them...but i always did in the end, and put them in their place....LOL

[DrZarkloff]

lol

[leshoffman1]

Dr.Z thanks for the great tip I was wondering exactly what would be the max seperation you would use in this situation example 45 mfd made up w/ a 20mfd & a 25mfd?

(As most capacitors give a +- mfd rating for pass or soon to fail)

Also will this work with dual capacitors?

[DrZarkloff]

I don't think that the separation matters as long as it all adds up to the rating you're after.

[Dcdatruth85]

This is sweet, I learn something new thanks Zarkloff.

[DrZarkloff]

Thanks for watching.

[Dcdatruth85]

ITs this old guy in my class i know what he would say hard start capacitors for everything lol.

[DrZarkloff]

lol. I know people like that, too.,

[icu812hardhead]

Yes that will get the unit running, till you can come back with the correct one . I thought that shirt you were wearing had a cape at first. Captain Hvac to the rescue. Great video

[DrZarkloff]

Thanks.

[hvac809]

never mind, its fixed

[hvac809]

the video stops at 3:23, might want to erase it.