Syrup Flow Regulators; Dispensing Valves; Dispensed Product Conditions; Overrun'', As Applied To Frozen Carbonated Beverages - Cornelius R-404A REFRIGERANT Service Manual

SYRUP FLOW REGULATORS

The syrup flow regulators located behind the front access door (see Figure 2 and Figure 12), are adjustable
regulators that control syrup flow rate to the product blender tanks for desired BRIX of dispensed product.
Adjust syrup flow regulators for desired BRIX as instructed in the SERVICE AND MAINTENANCE section.

DISPENSING VALVES

Self-closing dispensing valves (see Figure 5)), located on faceplates on front of Unit, are operated one at a
time or simultaneously to deliver product to the customer.

DISPENSED PRODUCT CONDITIONS

''OVERRUN'', AS APPLIED TO FROZEN CARBONATED BEVERAGES

Overrun Defined.
Overrun is product expansion that takes place in the frozen carbonated drink. It is caused primarily by CO gas
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breakout and secondary by freezing.
Overrun is a Variable.
The percentage or degree of overrun depends on a number of factors. The specific syrup, BRIX, low dispensing
volume, carbonation level in liquid product, and freezing, all affect overrun. After these factors have been
considered, desired viscosity (product consistency) adjustment may be made on the Unit. The viscosity adjust-
ment adjusts product texture from very wet to light.
Specific Product Ingredients Affect Overrun.
Each syrup has its own specific formulation of makeup. Baume, an important ingredient factor, may fall within
an extremely wide range. Fruit flavors contain citric acids that colas do not. Colas also differ in ingredients from
one brand to another. Each product formulation has its own peculiarities regarding the way the product will
absorb carbonation and the way it will release carbonation.
BRIX Affects Overrun.
Sugar in carbonated drinks is like anti-freeze in water. The higher the BRIX in a product, the greater resistance
the product has to freezing. Conversely, in products with lower BRIX, freezing takes place at higher
temperatures than for high-BRIX products. Thus, BRIX affects overrun because the amount of sugar in a drink
has a direct bearing on the product's freezing characteristics.
DRAWING 1
DRAWING 2
DRAWING 3
Low Dispensing Volume Affects Overrun.
When Unit sits idle for a period of time and no drinks are dispensed, CO gas in the system takes a ''set''. When
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first few drinks are drawn off after an idle period, CO gas has less tendency to break out as drink is dispensed.
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