LG LFX28978ST Restriction problems

[Tom558]

I am working on a Lg French door refrigerator. I have been a HVAC and commercial refrigeration for 24yrs, but I haven't worked on many residential  refrigerators.  I just converted my fathers LG refrigerator from a linear compressor to an Embraco   conventional  compressor, when I started it up to charge my suction was comfortable at 20 in of vac and only came up when I added some gas then right back down to -20. I came to the conclusion that My cap tube is completely blocked (not a big deal) then I noticed that my condenser discharge went straight up to the evap area then my cap tube came down from there to feed my drier/evap.  I flushed my condenser out and instead of coming out my cap tube   i blew right out of my suction line coming down to the compressor, if was feeding a dual evap and I had a valve up in there that  i couldn't see it would make sense.  The way i am thinking that it works now makes no sense.   Any thoughts?

[Vance R]

Your posted model number comes up as a single evaporator model. The condenser discharge goes to what is called the yoder loop or hot gas pass. This tube heats the area of the refrigerator cabinet that the freezer gasket touches to keep it warm so it won't get mold growing. Then it goes back to the drier then into the capillary line. LG put a small crimp in the capillary line just before it goes into the evaporator. Remove the crimp and blow out the cap tube with nitrogen. Which embraco did you use for the sub?

[Tom558]

Embraco Compressor Model# FF8.5HBK1 1/4 HP R-134A with Capacitor

The footprint was off by 1/2" in one direction and the rest of the compressor was laid out like the LG, the BTU's were close and the Embraco is a 1/4 instead of 1/5hp. The amps were a little higher but i didn't use the for power i just used the 12v condenser voltage for the relay coil.  Thanks so much for the info on the cap tube and discharge line I never would have come up with that on my own.

[Vance R]

Thanks for the info was just curious as  i've seen posts on other forums were the recommend compressor is fairly small.  This size difference is due the  linear being a variable capacity compressor and some standard compressors wind up being too large.