Sea Frost Freezers
(Sea Frost)

"If a good stove is the heart of any galley, a good refrigeration system is its very soul. Probably the most successful single system aboard Calypso is the refrgerator/freeser engineered by Dea Frost..."     Nick Nicholson, aboard Calyso, for Practical Sailor Magazine Freezers are the long distance cruiser's lifeline to civilization. A properly designed and equipped freezer will hold food for months at a time. A well-insulated, well-placed box is key to the success of any freezer application.

For proper storage of food in a freezer, holdover plate surface area must be increased over that of the sa,e refrigerant space. Sea Frost offers several types of freezer systems - spillover, sigle valve series and twin valve (two zone) systems. - all of which can be powered by multiple sources (engine drive, 110/220 volt or the DC 5000). Your choice should be based on box volume, configuration and location.

Spillover Systems consist of two holdover plates in the freezer section of the box. The box is divided by an air-tight wall, the bottom of which is fitted with a temperature controlled air damper (thermo-damper). The vent at the top of the divider allows air circulations between the two boxes. The thermodamper automatically controls the amount of air flowing from the freezer to the refrigerator, maintaining proper temperatures.

Single and Twin Valve Systems have plates in both the refrigerator and freezer boxes. A Single Valve system consists of two plates in the freezer and one in the refrigerator. All three plates are piped in series, with the refrigerant flowing from the valve to the freezer plates and from there to the refrigerator plate. Twin Valve Systems(two seperate zones) may be obtained by solenoid switching the refrigerant flow. Two expansion valves are used - one for freezer and one for the refrigerator - allowing you to run either or both of the boxes. The design is used where the freezer is not always needed, where the freezer needs more running time than the refrigerator, or where the cabinets are not adjacent to each other.