Retrofitting antique fridges

[ausjosh]

Hi all,

I'm currently trying to restore some old fridges.
Now my question is this:
The original compressor is running on R-12 (fossil stuff.) I want to change it over and run it on 134, and change the compressor.
Can anyone tell me the easiest way to calculate what size compressor I will need?
Anyone?
Bueller?

Cheers,
Josh

[paul_h]

If you were a fridgey you'd know this stuff.
What are you doing with the old fridges, just restoring the exterior? Are they not working? Are you removing the condenser and evap, compressor etc? What are you doing with the old R12?
Are you changing the evap, capillary etc?
You realise r12 is way better than r134a, and if it's there, keep it there or get everything done professionally.

[ausjosh]

Yes I am a fridgey. I have only been doing it full time for under a year now so I'm still learning these things.
I am restoring all of it. Exterior, electrical and refrig side.
The condenser and evap coils are remaining, I'm just changing the compressor.
I have never had the chance to work out what size compressors are needed for different fridges so I thought I would put the question out there. I figure I will need something around the 1/8 HP area, but wanted a few second opinions.
As for the R12, it will be getting reclaimed and sent back and replaced with a 134 system. I do realise that R12 is better, yes, but the compressor is far to inefficent.

[spimps]

Measure the cubic capacity of the fridge to size the compressor,or,depending on how old the cc of the old compressor should be on the label,easy then to cross reference.
Personally I'd clean the r12 and re use,you then have no capilliary or evaporator sizing issues,you could subsitute r413/49 for the r12.

[cool runings]

Yes I am a fridgey. I have only been doing it full time for under a year now so I'm still learning these things.


I do realise that R12 is better, yes, but the compressor is far to inefficent.

Just ask the place where you will buy the comp from to
supply you with a comp that will replace the one you have.

coolrunnings

.

[mikeref]

Hi all,

I'm currently trying to restore some old fridges.
Now my question is this:
The original compressor is running on R-12 (fossil stuff.) I want to change it over and run it on 134, and change the compressor.
Can anyone tell me the easiest way to calculate what size compressor I will need?
Anyone?
Bueller?

Cheers,
Josh
Let me know the make of fridge and type(ff or cycle defrost)+ compressor make/numbers. Will let you know if your barking up the wrong tree.. Mike.