When storage facilities of walk-in freezer type are used the following requirements shall apply:
- (1) Frozen food in storage shall be on dunnage, pallets, racks or skids, and shall be stored so as to permit free circulation of refrigerated air.
- (2) The facility shall be equipped with a thermometer, the sensing element of which shall be located within the upper third of the distance between floor and ceiling. The sensing elements shall not be placed in a direct blast of air from cooling units, cooling coils and heat exchange devices, or near the entrance door.
- (3) The facility shall be equipped with an automatic mechanism for defrosting refrigerated coils when forced air blower refrigeration is used.