[QUOTE=MJ360;3560802]Hi Richard. It is a pleasure to hear from you. Over the past 4 years, I have read every word you have written on the frigoboat capillary tube blockage issue. Mine is the infamous keel
Like so many before me, I have been chasing this problem for a long time. I was going to replace the entire system with a reqular water-cooled, but marine
reefer units are backordered until doomsday. At this point I am willing to risk the price
of a new evap so as to get to sea next month. I understand the issue may well not be resolved by a new evaporator (from reading some of your responses over the years).
I figured while the system is open, replacing the compressor oil might help if the issue is all, or part moisture. I intent to install a filter/drier just before the cap tube.[/QUOT
MJ, Other boaters and many technicians have failed in their attempts to solve this design problem created by overheating
of compressor oil. There have been attempts to replace the evaporator more than three times on the same boat
, filter dryers were added several times with larger filters and one machine shop cut the dome off the compressor and removed and cleaned the compressor assembly. If it is possible to sterilize and clean all components in a complete refrigerant loop this problem could be eliminated. But to prevent a recurrence the compressor overheat condition must be corrected
Refrigerant Filters are designed to collect solid material above the lever of 4 micron. The damaged oil in high pressure side interring to capillary tube transformers this contaminated liquid from solid liquid allowing contaminants to crystallize and start restricting flow while inside the outlet end of cap tube. The first sign you would be advised of a problem would be poor cooling
performance indicating loss of refrigerant, solution at that point is add refrigerant to bring back normal performance. In one case this problem and solution was repeated several times resulting in the end where the current
draw of this system reached 18 amps to get normal cooling
. Two boaters sent me their complete length of cap tub and aluminum
at the evaporator, I Found cristales in over a two foot length of tube starting at the evaporator end.
I ran a search of my hard drives and found 200 emails and forum posts regarding this problem,
I met with their company engineer
about oil overheating problem who did not consider it a problem. I contacted his home office and was informed there was a screen
before entrance of cap tube which I did not find on either the cap tube or line I examined.
Cooler system is a good and efficient system with thousands installed in the right applications where compressor limits are not exceeded.