Servicing Water Pump Water Inlet Strainer Screen

(see Figures 5 and 9)

1.Unplug Unit power cord from electrical outlet.

2.Remove the Unit hood by loosening one screw on top of the hood, then lift the hood up and off the Unit.

3.Close the water inlet supply line shutoff valve.

4.Note pressure setting on the carbonator primary CO2 regulator, then turn the regulator adjusting screw to the left (counterclockwise) until the gage reads 0-psig.

5.Remove screw securing the carbonated water tank access hole cover, then remove the cover for access to the carbonated water tank relief valve.

6.Pull up on the carbonated water tank relief valve to release CO2 gas pressure from the tank and the car- bonated water system.

7.Loosen the screen retainer, then pull the screen retainer and the strainer screen from the water pump.

8.Pull the screen from the screen retainer. Clean any sediment from the screen retainer and the water pump screen retainer port.

9.Inspect the screen for holes, restrictions, corrosion, and other damage. Replace the screen if damaged (P/N 315348000).

10. Check O-Ring on the screen retainer. Replace the worn or damaged O-Ring (P/N 315349000).

NOTE: A screen should always be used, otherwise particles could foul the double-liquid check valve.

11.Install screen (P/N 315348000) in the screen retainer, then screw the retainer into the water pump and tighten securely.

12.Service the double-liquid check valve, (refer to next paragraph Servicing Double-Liquid Check Valve) as instructed.

Servicing Double-Liquid Check Valve.

(see Figures 5, 9, and 10)

1.Service the water inlet strainer screen as instructed in previous paragraph before servicing the double-liq- uid check valve.

2.Disconnect the carbonated water line from the double-liquid check valve, then remove the double-check valve from the water pump outlet port.

3.Disassemble each check valve as shown in Figure 10.

4.Wipe each part with a clean lint-free cloth. Inspect each part, especially the ball for burrs, nicks, corrosion, deterioration, and other damage. Discard the ball seat and any damaged or suspicious parts and replace with new parts during reassembly.

5.Reassemble check valves as shown in Figure 10. ALWAYS INSTALL A NEW BALL SEAT (QUAD RING) P/N 312418000.

NOTE: Make sure when assembling the check valves together, the check valve female end with a white tapered gasket inside is on the inlet side of the double-liquid check valve assembly.

6.Assemble the check valves together as shown in Figure 10.

7.Install the double-liquid check valve in the water pump outlet port.

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Cornelius R-134A service manual 312027000
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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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