Replacement capacitor for compressor

[sansonet]

Im looking for cap for my dehumidifier, its compressor start cap failed - original is polypropylene film 15uf 300V 5% described as "start" on shematic. I ordered one from China, but looks like package was lost after I waited over month so I want buy one available locally and dont wait forever again. It is easier to find round/oval oil filled ones, will they work as replacement? Something like this http://www.supco.com/web/supco_live/.../CR15X440.html
Mounting/bigger size not a problem, there lot of empty space where original was located.

[goontron]

Re: Replacement capacitor for compressor

That'll work. The oil filed is higher voltage, both are continuous duty, both have a similar operating temp range, both are protected, both engineered for compressor use!

[sansonet]

Re: Replacement capacitor for compressor

Thank you! I will get one ASAP and hopefully will have working dehumidifier soon - original reads 2.5uf, but I tried few smaller fan capacitors tied in parallel to bring total to ~15uf for testing, turned it on for few minutes and looks like it worked OK.

[keeney123]

Re: Replacement capacitor for compressor

So if this cap just for the start of the fan motor or is it for both the fan and compressor? Usually a start cap for compressor is of higher uF. The only other thing that might be of concern would be the 10,000 Available Fault Current on the original.

[goontron]

Re: Replacement capacitor for compressor

^ its not marked as a multicap, that would be something along the lines of 15/4uf

[sansonet]

Re: Replacement capacitor for compressor

So if this cap just for the start of the fan motor or is it for both the fan and compressor? Usually a start cap for compressor is of higher uF. The only other thing that might be of concern would be the 10,000 Available Fault Current on the original.

No, this one is for compressor, fan motor has its own cap - see picture of schematic in first post. It supposed to be 15uf, but tester reads 2.5uf right now, compressor tries to start and shots down right away.

[keeney123]

Re: Replacement capacitor for compressor

So I looked at the schematic and I see a start cap listed near the motor coils and a start cap listed near the fan motor. I was asking if this is the same cap that has two different connectors on one side and one connector on the other side as that is what the picture of the cap is showing in your picture?