Hussmann 0389455

MODULE-DEFROST

The defrost mechanism in a refrigerator heats the cooling element (evaporator coil) for a short period of time and melts the frost that has formed on it. The resulting water drains through a duct at the back of the unit. Defrosting is controlled by an electric or electronic timer: For every 6, 8, 10, 12 or 24 hours of compressor operation it turns on a defrost heater for 15 minutes to half an hour.

A defrost thermostat opens the heater circuit when the evaporator temperature rises above a preset temperature, 40°F (5°C) or more, thereby preventing excessive heating of the freezer compartment. The defrost timer is such that either the compressor or the defrost heater is on, but not both at the same time.

In foodservice equipment, a module is one sub-component (or "part") of a larger more complex device that may be the fully assembled piece of equipment itself. A module may refer to a variety of replacement parts including relay modules, ignition modules, communications modules, heater modules and others.