Yep, Brian, I've also got 3 Vitrifrigo units that consume Amps at a rapacious rate. I'm a bit sorry that I didn't bite the bullet straight after i purchased my boat
(used) and consign them to a much more apt function as artifical reefs
. Fine examples of Italian engineering! Replacing the "friggios" with a properly insulated fiberglass
cabinet and a water
cooled eutectic system would have paid dividends over time.
The insulation is inadequate in thickness and quality. Condensation
forms on the outside because of thermal leak but also seems to waterlog the foam itself, particularly in the door. This would further reduce efficiency.
I looked at glueing extra foam to the base and sides, but didn't think that the units could then fit back in to the recesses. I was also concerned that the metal cabinet would rust due to trapped water
What i did achieve was to improve ventilation around the compressors and condensers. The heat build up in this space is considerable when they are running hard, which is most of time in our climate. The heat can be felt on the outside seat back through the padding. I replaced the plastic vents near the saloon
door with larger models and attached 12 volt computer fans to exhaust
through these vents. Another fan was added behind the slots in the wood
cabinet side to blow in air. The fans were supposed to be able to be run off the compressor wiring
but this caused overload issues, so instead of installing relays, etc. I just activate manually via a concealed toggle switch when required. This keeps the temperature around the fridge and freezer
much lower and also dries condensation
The other thing to do is adjust the doors to be sure the seals
are not leaky. This is a fiddly job. Use a sheet of paper and make sure that it doesn't easiy slide at any part of the opening. You may need to bend the door if it is out of shape.
Good luck and cold beer