Cooling - to remove heat from the food
Isotherm Self-Pumping System
As this hose is not restricted by pumps or non-return valves, the flow inside is completely free. Each movement of the water surrounding the boat produces a similar change of the water level inside the hose resulting in the pumping of a similar quantity of water in and out through the hull fitting. By designing a special hull fitting containing a non-restricting, full-flow spiral heat exchanger for cooling the heated refrigeration agent, an extremely efficient cooling system is created. As the hull fitting is always situated some distance from the boat's centre of gravity, even the smallest movement of the hull or mast of a sailing boat is sufficient to create a pumping action. This movement by which warm water is continuously pumped out and cold water in, also prevents fouling. The through-hull fitting is made of saltwater resistant brass and the full-flow coil heat exchanger is of copper-nickel alloy. A zinc anode comes with the kit. The 5 ft. pipe connecting it to the compressor and the 8-9.75 ft. pipe from the holding plate are both pre-filled and fitted with quick-fit connectors.