We do these type of Holding Plate recycle projects all the time.
If you have the dreaded "spider plates" where you have a bunch of 1/8" copper lines leaving the expansion valve and diving
into the holding plate, then honestly, those are best to just throw in the trash. But if you have Glacier Bay more traditional holding plates, those would be easily reusable.
Unlike the system you have now with a single compressor
and solenoids sending the refrigerant gas to the freezer
, you will need to install a single compressor unit for each Box. One for the Refrigerator
plate and one for the two freezer plates. Each will be turned off and on by it's own thermostat in the box.
Since holding plates themselves rarely if every go bad and fail, we do about 4-5 of these conversions per month, so as a rough cost estimate, I can tell you it will be about $1800 to $2000 per box. You will need the following for each box:
copper line set to connect the new compressor to the holding plates
new expansion valve for the holding plates
misc fittings and odds and ends