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THEORY OF OPERATION
(see Figure 2)
IMPORTANT: Before connecting electrical power to Unit, refer to nameplate and note if Unit is to be
operated with 50 or 60 Hz power source.
Note: The following paragraph describes the theory of operation for the Two-Flavor FCB Dispenser (see
Figure 2).
A CO
cylinder delivers carbon dioxide (CO
2
cylinder. The primary CO
inside the Unit and also to the soft drink tanks. CO
the two carbonated water tanks and also to the product-blender tanks inside the Unit. CO
syrup out of the soft drink tanks through the syrup sold-out switches, through adjustable syrup flow regulators,
through electrically-operated syrup solenoid valves, and on to the product blender tanks. At the same time, plain
water passes through the water pressure regulator and is pumped into the carbonated water tanks by the water
pump and is carbonated by CO
pressure from the carbonated water tanks, through adjustable carbonated water flow regulators, through
electrically operated carbonated water solenoid valves, and on to the product blender tanks. Carbonated water and
syrup enter the tanks properly proportioned (blended) for desired BRIX of dispensed product by adjustment of the
syrup flow regulators. From product blender tanks, product is pushed by the CO
beater in each freeze cylinder is driven by an electric motor. Scraper blades, attached to the beaters, scrapes
product from the cylinder walls as product enters the freeze cylinders and is frozen. Transparent faceplate,
attached to the front of each freeze cylinder, includes a self-closing dispensing valve and a spring-loaded relief
valve that protects freeze cylinder from accidental over pressure. The relief valve is also used to bleed CO
pressure from the freeze cylinder to atmosphere when filling the cylinder with product. Electronic sensing on each
freeze cylinder motor provides a means of adjusting viscosity (consistency) of the dispensed product to suit
customer preference.
DEFROST SYSTEMS
The Unit is equipped with both manual and automatic hot-gas defrost systems. The automatic defrost system may
be programmed into the Unit to occur up to nine different times a day with a minimum of two hours between defrost
time settings or the system may be completely turned off.
MANUAL DEFROST SYSTEM
The Manual hot-gas defrost system may be activated at any time by pressing the ''DEFROST'' switch on front of
the Unit. Refrigeration compressor will operate for a short time, then both freeze cylinders will go into defrost and
defrost for approximately 60-seconds. At the end of the manual defrost cycle, the Unit will return to normal
operation. Manual defrost may be cancelled at any time by pressing the ''CANCEL DEFROST'' switch.
AUTOMATIC DEFROST SYSTEM
The automatic hot-gas defrost system may be programmed into the Unit to occur up to nine different times a day
with a minimum of two hours between defrost settings. At the start of each automatic defrost cycle, refrigeration
compressor will operate for 30-seconds to pump freon out of the freeze cylinders evaporator coils. After freon has
been pumped out of the freeze cylinders evaporator coils, No. 1 freeze cylinder only will go into defrost cycle and
defrost for approximately 7-minutes, then will return to normal operation. This ends the automatic defrost cycle of
No. 1 freeze cylinder. No. 2 freeze cylinder will defrost 30-minutes after the start of No. 1 freeze cylinder. The next
automatic defrost cycle will occur according to the time programmed into the Unit. Automatic defrost may be
cancelled at any time by pressing the ''CANCEL DEFROST'' switch.
) gas to an adjustable primary CO
2
regulator assembly in turn delivers CO
2
gas pressure also entering the tank. Carbonated water is pushed by CO
2
3
gas to an adjustable secondary CO
2
is delivered from the adjustable secondary CO
2
regulator assembly attached to the
2
2
regulators to
2
gas pressure pushes
2
gas into the freeze cylinders. The
2
312026000
regulators
gas
2
gas
2
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