NOTE: To readjust CO2 regulator to a lower setting, loosen adjusting screw lock nut, then turn screw to the left (counterclockwise) until pressure gage reads 5 psi lower than new setting will be. Turn the ad- justing screw to the right (clockwise) until the gage registers new setting, then tighten the lock nut.

Adjusting Carbonator CO2 Regulator.

Adjust primary CO2 regulator (regulator controls Unit built-in cold carbonator CO2 pressure) to a nominal 80 psig. Check for CO2 leaks and repair if evident. INLET CO2 PRESSURE TO CARBONATOR MUST NOT EXCEED 125 PSIG.

Sugar Syrup Tanks Secondary CO2 Regulator.

Adjust sugar syrup tanks secondary CO2 regulator with 100 psi gage at 40 psig for syrup lines up to 10 feet in length plus one pound for each additional length of 10 feet, plus one pound for each 2 feet of vertical lift. For example; if syrup line total length is 30 feet and total vertical lift is 6 feet, then 40 psig + 2 psig (1-pound for ev- ery 10 feet of length over 10 feet which is 20 feet) + 3 psig (1 pound for every 2 feet of vertical lift which is 6 feet); total equals 40 + 2 + 3 = 45 psig CO2 regulator setting. Loosen lock nut on CO2 regulator adjusting screw, turn adjusting screw to the right (clockwise) until gage registers desired pressure, then tighten lock nut.

Low-Calorie (Diet) Syrup Tank Secondary CO2 Regulator

Adjust low-calorie (diet) soft drink tank secondary CO2 regulator with 30 psi gage to 10 psig for syrup lines up to 30 feet in length. Syrup lines longer than 30 feet in length may require a slightly higher CO2 regulator setting of 12 psig maximum. Excessive CO2 pressure may cause low-calorie syrup carbonation resulting in foam.

ADJUSTING DISPENSING VALVES WATER FLOW RATE

SF-1 Dispensing Valve.

(see Figure 6)

1.Remove acorn nut securing the dispensing valve cover, then remove the cover to expose the valve water and the syrup flow controls.

2.Remove dispensing valve nozzle by turning nozzle counterclockwise and pulling down.

3.Remove syrup diffuser by pulling straight down.

ADJUSTABLE WATER

ADJUSTABLE SYRUP

FLOW REGULATOR

FLOW REGULATOR

 

NOZZLE

SYRUP DIVERSION

TUBE ASS’Y (P/N 319540000)

WATER

CHAMBER

RATIO CUP (P/N 311100000)

FIGURE 6. SF-1 DISPENSING VALVE

23

312027000

 

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Cornelius R-134A service manual Adjusting Dispensing Valves Water Flow Rate, SF-1 Dispensing Valve
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R-134A specifications

Cornelius R-134A is a refrigerant commonly used in various cooling and air conditioning applications. It belongs to the hydrofluorocarbon (HFC) family and has become a favored alternative to many ozone-depleting substances. Unlike its predecessors, R-12, which has been phased out due to its detrimental effects on the ozone layer, R-134A offers a more environmentally friendly solution, albeit still having global warming potential.

One of the main features of R-134A is its favorable thermodynamic properties. It exhibits a low boiling point of approximately -26.3°C (-15.3°F), making it suitable for various refrigeration applications, including automotive air conditioning, commercial cooling systems, and domestic refrigerators. Its efficiency is regarded as superior, allowing for quick heat absorption and dissipation. This efficiency translates into energy savings, ultimately benefiting both consumers and manufacturers.

R-134A also boasts a relatively high vaporization heat, demonstrating its effectiveness in heat transfer processes. The low toxicity and non-flammability of R-134A further enhance its appeal, as it poses minimal risk during handling and application. This characteristic makes R-134A safer for technicians and users compared to older refrigerants, which presented higher health hazards.

Within modern technologies, R-134A plays a crucial role in both chiller systems and heat pump applications. It is compatible with various lubricants, allowing manufacturers to utilize R-134A in existing systems with minimal modifications. However, it is essential to use the correct type of oil, as mixing different types can lead to system inefficiencies and potential failure.

Despite its advantages, R-134A has a global warming potential of around 1,430 times greater than carbon dioxide, prompting the refrigerant industry to look for alternatives. Newer refrigerants, such as R-1234yf, offer lower environmental impact, driving a shift towards more sustainable options.

In conclusion, Cornelius R-134A remains a widely used refrigerant known for its efficiency, safety, and effectiveness in heat transfer. While it has played a significant role in the refrigeration and air conditioning industries, the ongoing search for eco-friendly alternatives highlights the need for continued innovation and adherence to environmental standards.
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