Isotherm 2051SP Compact SP Water Cooled  Kit with Small O Evaporator with Mechanical Thermostat control

Self-pumping sea-water cooled units

The Isotherm SP units cool with the use of seawater.
This method has the advantage that the heat exchange is made via a water cooled condenser.
The water-cooled Isotherm SP operates consistently at an extremely high level of efficiency.
Without fans or pumps to remove the heat generated by the condenser,
the SP system consumes less battery power and is remarkably quiet.

The Isotherm SP unit uses the movements of the hull to draw heat down and out through a special
fitting in the galley sink drain hose. The flow is completely free inside the draining hose, so each movement
of the surrounding water produces a similar quantity of water level inside the hose,
which results in pumping an equivalent amount of water in and out.
By designing a special hull fitting containing a non restricting, fullflow spiral heat exchanger for
cooling the heated refrigeration agent, an extremely efficient cooling system is created.

As the hull fitting is situated away from the boat’s center of gravity,
the smallest movement of the hull or mast of sailing boat is sufficient to create a pumping action.
This movement results in constant withdraw of warm water and intake of cold water which also prevents fouling.

Isotherm Part number U125X000R11311AA Max Volume 125 Litre - 
Small O Oval Evaporator 240mm x 210mm x 85mm  Compressor Dimentions 280mm x 160mm x 175mm
Weight 11kg 
BD35F Compressor

Click here for the SP instalation manual

Click here for the Product manual