Theory Of Operation; Defrost Systems - Cornelius 326142000 Service Manual

Table 1. Design Data (cont'd)
Overall Dimensions:
Height
Width
Depth Without Drip Tray
Depth With Drip Tray
Shipping Weight (approx.)
Compressor Horsepower
Refrigeration System:
Refrigerant Type
Refrigerant Charge
Ambient Operating Temperature
Electrical Requirements:
60 Hz Unit:
Operating Voltage
Current Draw
50 Hz Unit:
Operating Voltage
Current Draw

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 and also note beaters drive motors manufacturer's name. No.
6, No. 7, and No. 8 switches on DIP switch assembly on master circuit board must be set according to
motors manufacturer and for 50 or 60 Hz operation.
CO2
A cylinder delivers carbon dioxide (CO
the cylinder. Primary CO
2
inside the Unit and also to two soft drink tanks. CO
carbonator tank and also two product-blender tanks inside the Unit. CO
drink tanks, through syrup sold-out float switches, through electrically-operated syrup solenoid valves, through
adjustable syrup flow regulators, and on to product blender tanks. At the same time, plain water passes through
water pressure regulator and is pumped into carbonator tank by water pump and is carbonated by CO
pressure also entering tank. Carbonated water is pushed by CO
electrically operated carbonated water solenoid valves through adjustable carbonated water flow regulators, and
on to product blender tanks. Carbonated water and syrup enter tanks properly proportioned (blended) for
desired BRIX of dispensed product by adjustment of syrup flow regulators. From product blender tanks, product
is pushed by CO gas into freeze cylinders. The beater in each freeze cylinder is driven by an electric motor.
2
Scraper blades, attached to beaters, scrapes product from cylinder walls as product enters freeze cylinders and
is frozen. Transparent faceplate, attached to 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
product. Electronic sensing on each freeze cylinder motor provides a means of adjusting viscosity (consistency)
of 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 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.
326142000
) gas to an adjustable primary CO
2
regulator assembly in turn delivers CO
2
gas pressure from freeze cylinder to atmosphere when filling cylinder with
2
gas to adjustable secondary CO
2
is delivered from adjustable secondary CO
gas pressure pushes syrup out of soft
2
gas pressure from carbonator tank, through
2
2
Table 1. Design Data (cont'd)
Overall Dimensions:
60-1/2 inches
19-1/4 inches
32-1/2 inches
38 inches
466 pounds
Refrigeration System:
See Unit Nameplate
40 F to 100 F
Electrical Requirements:
219/242 VAC60 Hz Single Phase
21.2 Amps
219/242 VAC 50 Hz Single
regulator assembly attached to
2
regulators
2
regulators to
2
2
2 H.P.
R-502
Phase
22 Amps
gas