Capacitor

kevsul1

Has anyone seen a set up like this? Old Rheem  condenser has 20-15 uf capacitor for just the compressor not for the fan also. Called rheem they no longer stock make these. Can I wire a two prong cap on here? 

mattmia2

Bleed resistor for the cap, makes sure it discharges when the power is off. Can solder it to the terminals of the new cap.

You can replace the 2 section cap with a new 2 section cap or 2 separate caps. The question is what is the capacity of the sections, it is just split in the middle or is it 2 15-20 mfd sections

mattmia2

Or is one section 15 mfd and the other section 20 mfd? Usually "15-20 mfd" is how they show the tolerance.

pecmsg

Why do you want to replace it Has that cap been tested

kevsul1

Another tech is saying it is bad I wasn’t there personally trying to help him out. 

kevsul1

What’s throwing me is the three prongs on a single cap and the 20-15 rating. The black wire looks like it’s the common and the purple and red go to the compressor. 

pecmsg

Any information on the condenser fan motor?

mattmia2

The schematic shows that one section connects to T3 and the other section connects to L3. The capacitor values may be on the compressor ratings plate.

pecmsg

Get the compressor #’s and it can be answered!

JUGHNE

Looks like a trickle thru the capacitor and start winding for crankcase heater.

No cap for the fan motor....rare today.

EBEBRATT-Ed

If you look at the cap it looks like the terminals are marked C-common and A and B. Looks like two caps in one enclosure.

If you look on the wiring diagram one capacitor is CR...compressor run capacitor. That one is always used. There are two capacitors in that one you showed. They wired both capacitor in that cap in parallel which gives you a 15 +20 =35mfd run capacitor.

The start relay (rs in the diagram) and run capacitor (cs in diagram) are optional and used for hard start applications, your unit does not have or apparently need those two items.

109A_5

Hello @kevsul1,
Although the labeling on the Capacitor is a bit vague, I also believe it is a two section Capacitor. Terminals C to A = 20uF and C to B = 15uF. Multi section Capacitors are quite common depending on where you look.


Maybe;
https://www.supplyhouse.com/Jard-12964-20-15-MFD-Oval-Run-Capacitor-370V
I think the picture is incorrect.
or
https://www.amazon.com/gp/product/B00MEO3NN6/ref=as_li_tl?ie=UTF8&tag=urandifeotom-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B00MEO3NN6&linkId=8dc1e68b7194ef5d26b05ea4cd357baf

HVACNUT

It looks like a combo start/run cap, but 20-15 MFD seems low for both. 
Check the tag on the compressor to see what cap is needed, then use it, plus a hard start cap/relay kit.

mattmia2

HVACNUT said:

It looks like a combo start/run cap, but 20-15 MFD seems low for both. 
Check the tag on the compressor to see what cap is needed, then use it, plus a hard start cap/relay kit.

Whatever values they are are in parallel and connected to the start terminal so the capacity is the sum of both sections. One of the sections as stated above is always in circuit to act as a crankcase heater. It is a run capacitor only, it doesn't switch out of circuit once the motor starts.