Capacitor American F/F

[Kirk]

Went to an GE American F/F found Cap blown I was very surprised that it was an 80uf I’ve never had to fit one above a 40 even the Maytag I have at home is a 5uf.

It was fitted with a Danfos SC18?? I don’t have an HRP book now to check anyone out there know?

Thanks Kirk

[eastlmark]

Re: Capacitor American F/F

Sure there is not a missing decimal point in there? Could aways parrallel up 4 20uf ones if you have the room!

[jongriffin]

Re: Capacitor American F/F

Hi think you will find with sc18 compressors 80uf is not unusual i usually fit 60-80uf with no call back.

[BobHope]

Re: Capacitor American F/F

Hi Kirk,
80uf is normal on that compresser, this is a start capacitor the 5uf one on your maytag is a run capacitor.
As john sugests any 60 to 80uf will work fine.
hope that helps.

Cheers Bob.

[Kirk]

Re: Capacitor American F/F

Thanks for your help Kirk.

[eastlmark]

Re: Capacitor American F/F

This is interesting, does this mean that the compressors I sometimes see with both a capacitor and and a start relay use the cap as a ‘run’ capacitor (why?) This would explain an AEG I once had with a blown top cap that was still working fine.
Were not capacitor start comps introduced along with hydrocarbons to provide a spark free start?
Any info would be most helpful.
Mark.

[BobHope]

Re: Capacitor American F/F

Hi Mark.
The run capacitor is used to improve the efficiency of the compressor to achieve the A rating class, the run current drops quite a lot when the capacitor is in circuit. Some compressors will work without it fitted but not as efficiently.

Cheers Bob.

[eastlmark]

Re: Capacitor American F/F

thanks for the info Bob.

[BobHope]

Re: Capacitor American F/F

No problem Mark,
if you need some specifiction on compressors or comparison charts let me know and i will copy what i have.

Cheers Bob.

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