Originally Posted by hvacgaspiping
If you don`t want to scramble the compressor, you need to be careful about letting the frostback get past the accumulator and into the compressor. That`s the job for the accumulator (that little black expanded bulb in the suction line returning to the compressor). Running that compressor with no heat load on it, ie without heat transfer of the water, is extremely hard on it. It would only take a half dozen or so times of your name written in frost to knock out the compressor. Also, do NOT remove any fins from the condenser; I gave that advice in an earlier thread about the evaporator that another guy was going to immerse in his reservoir. I see you removed the fan blade that was going to the evaporator; good move, `will cut down on the air noise. You`re on the right track. You can get some Armaflex (brand) sheet closed cell rubber insulation at most refrigeration supply houses. Even though these places are wholesale, I think they will still sell this to you, as that would be no threat to the tradesmen competition wise. `Same goes for the Armaflex pipe insulation, which comes in varying thicknesses and I.D.s. If you`re going to run your refrigerant piping any distance over 20 feet, you need to vapor seal each joint of pipe insulation. Black duct tape will be good enough, unless you want to use spray on contact glue. A better evaporator to immerse in the water was shown in the earlier thread, which consisted of a specially coiled copper tube specifically made for this type of setup. But to do this you need to be prepared to do some refrigeration work, which would take the right tools and materials (freon-22, refrigerant scale, torch, vacuum pump, copper couplings,refrigerant access taps w./schrader valves, 15% silv-floss, and the skills and know to use them). If you have any more questions relating to this topic, ie refrigeration and chillers, let 38 years of experience give you a hand.