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PRODUCT LOADING - CONTINUED
Proper air circulation in the insulated box refers to air that can move
around and through the load. This is a critical element in maintaining
product quality during transport. If air cannot circulate completely around
the load, hot spots or top-freeze can occur.
The use of pallets is highly recommended. Pallets, when loaded so air
can flow freely through the pallets to return to the evaporator, help protect
the product from heat passing through the floor of the truck. When using
pallets, it is important to refrain from stacking extra boxes on the floor at
the rear of the truck, as this will cut off the airflow.
Product stacking is another important factor in protecting the product.
Products that generate heat, such as fruits and vegetables, should be
stacked so that the air can flow through the product to remove the heat.
This is called "air stacking" the product. Products that do not create heat,
such as meats and frozen products, should be stacked tightly in the
center of the box.
All products should be kept away from the sidewalls and ceiling of the
cargo area to allow air to flow between the body and the load. This will
prevent heat from filtering through the walls and affecting the product.
It is important to check the temperature of the product being loaded to
ensure that it is at the correct temperature for transport. The refrigeration
unit is designed to maintain the temperature of the product at the
temperature at which it was loaded; it was not designed to cool a warm
product.
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