We-6 refrig options
:
I am at the planning stage of putting a refrig unit into my WE-6. It came with the evaporator coil inside the cooler, but no compressor or condensor. I have a compressor and a decent (not great) understanding of refrig principles. Does anyone have input on the best way. 2 ideas I am considering are;
1) Connect the compressor to the existing evap coil and craft a condensing coil to go below. Will the existing evap coil cool enough to where water is not needed (air cooled)?
2) Connect the compressor to a newly crafted evap coil placed inside the unit and condensing coil below. Idea here being that it would be air cooled.
Also is R22 the typical refrigerant in these units?
johnieG:
In short as follows: 1: No, the water cooling coils don't have enough surface area to properly cool the cabinet even if you added a fan/motor to circulate the air.
2: Yes, this would be the better idea to convert the wet-box to a dry box. and lastly about the R22 NO! R22's cooling properties aren't suited to this task, use R134a, or a blended refrigerant like Hot-Shot, R404a, etc. Have a talk with Eric over at Global compressors, he's a great resource of idea's and information, if you don't have the access & training & tool's for the job you're "asking for it"
:
Good info. Thank you for your advice. I'll give Greg a call.
The compressor I plan to use is from a 6 cu ft frig that used the older type refrig, not the 134a. I understand that the older freon is more efficient. While I have someone in mind to help with drawing a vacuum and recharging, I want to put the unit together and get it ready.
Do you have an idea on what freon was used in the pre 134a units? I thought it was R22, but your info makes me wonder.
johnieG:
It was R-12, but a system (compressor) that was made for
R-22 won't work with R-12, there are pressure, and oil compatabilty problems, so stick with whichever refrigerant that goes with your compressor, and if you start to think about how that refrigerator worked (that you took the compressor out of) you must remember that the cold air for the food section of the 'fridge, is actually made in the freezer compartment and blown down to the lower cabinet area. most R-22 systems are freezers, and BIG "reach-in" coolers, and of course building air conditioners. food for thought!
MoonDawg:
Mash, I know nothing about this refrigeration language, but wanted to comment on your first question about using the existing evaporator coil. I had a 6 case master with working refrigeration. I wanted to eliminate the water and use air cooling. Johnie is right, a fan didn't work by itself.
My sheet metal friend made a neat enclosed stainless steel shroud housing the coil, and added a small "pancake" fan to blow air across the coils and a curved plenum to direct the air around the rest of the box and return it to be re-cooled. It worked great.
The advantage was it took up much less space inside than most available replacements I could find. I think he still has the blueprints if anyone is interested. Glen
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