INSTRUCTION AND SERVICE PARTS MANUAL - FREEZER CS 800, s/n F0176-00 - ALFRED & CO
F1
5. DESCRIPTION OF THE MACHINE AND SPECIFICATIONS
5.1. PURPOSE OF THE MACHINE
CS “freezers” are machines for contiunuos ice cream production by dosing,
mixing and refrigerating ice cream mix and air.
5.2. PRINCIPLE OF OPERATION
The unit is a combination of various systems working together to:
• Pump the product through the freezing cylinder
• Freeze the product to the correct stiffness.
• Add air at a controlled rate.
• Incorporate air uniformly into the product.
• Pump the frozen product to the next process step.
The principle of operation is best understood if each system is considered
separately.
5.3 MACHINE ANALYSIS BY HACCP 43/93/CEE METHOD
5.3.1 Analysis of alimentary Hazards
Freezers are machines that permit the continual production of ice-cream by
means of a previously pasteurised mix; as it freezes, the mass absorbs air,
injected into the mix on entry into the freezer cylinder.
In a machine processing a previously pasteurised, refrigerated mix that is
cooled to safe temperatures from a microbial point of view, the alimentary
hazards are mainly associated with:
• the possibility of external contamination
• problems associated with the cleanliness of machine parts in contact
with the product
5.3.2. Identification of points at which alimentary hazards may develop
Problems related to external contamination are exclusively associated with
the injection of air or nitrogen into the mix. Cleanliness related problems
are on the other hand linked with the efficiency of washing and sanitisation;
the areas most under risk are the dasher (agitator shaft), the pumps, the
air injection valve and the front inspection port.
5.3.3. Provisions taken with regard to the identified points.
Injection air
• The compressed air used by the client to feed the injection valve
mounted on the freezer must be filtered to ensure an adequate level
of hygiene and must be free of oil.
Cleaning and sanitizing
• The machine is designed and constructed to be closed circuit washed
with claning in place system (CIP wash)
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