Guide to Choosing Evaporators

Evaporators; Vertical, Bin (B), Horizontal (H), or Flat Plate (F).

If you have a single box that you are converting into a refrigerated space, the Vertical Bin or Horizontal (with door) versions make the most sense, as the area inside the bins becomes a freezer where you can store some frozen goods & even make ice. The rest of the ice-box is kept at refrigerator temperatures under the control of the thermostat. Of the two, the Vertical Bin is the most popular in top opening boxes as it is easier to install & use, whereas the Horizontal version is standard in boxes with front opening doors only. The Vertical Bin is available in two sizes, and, if the larger size is preferred in a smallish box because of its larger freezer capacity, some of the surface area may have to be covered with an insulating material to ensure that goods stay frozen inside. The larger size (340B) is not available in a horizontal configuration with a door, so one will have to be fashioned to stop goods from falling out when mounted horizontally. Conversely, the smallest Horizontal evaporator (130H) is not available as a vertical model, but may be used as such without problems.

If you have a large box & require more of a freezer area than the largest Vertical or Horizontal models can offer, a “spill-over” system may be the answer. In this application, one area is partitioned off with a barrier, & a Flat evaporator installed that is controlled by a freezer thermostat. A hole is then cut into the barrier and a “Spill-over Fan & Thermostat” installed that will keep the rest of the box at refrigerator temperatures. A hole or gap over the barrier will provide a return path for the circulating air.

If you have a box or boxes that will be a dedicated refrigerator or freezer, a Flat evaporator may be bent to shape with a 11/2” min radius, & installed around the perimeter of a box. See the green spec sheet or the web site for allowable bending areas. You will need to choose between a refrigerator or freezer thermostat, & there is also a “Dual thermostat” that is a housing that contains both a refrigerator and a freezer thermostat & also a change-over switch to enable the user to choose the application.