Recommended Waiting Period
Since most freezers are at room temperature when they are purchased and delivered, they need time to chill to freezing temperatures before being filled. A minimum of 24 hours is the recommended waiting time. If the environment in which the freezer is placed is abnormally hot, waiting longer before adding food is recommended.
Food Storage Guidelines
Putting room temperature food into a new freezer demands more energy to freeze than previously frozen or thoroughly chilled items. Placing foods into freezers that are not pre-chilled promotes the formation of ice crystals, which can damage the fibers in meat and poultry or make soups and sauces thin and watery.
Freezer Placement Hints
If a freestanding freezer is placed under a shelf or other barrier or against a wall, a gap of at least 1 inch should be maintained between the freezer body and surfaces so the appliance's condenser receives adequate ventilation. Improper ventilation requires the compressor to work overtime, which uses more energy and can increase frost buildup.