Cornelius R-134A service manual 312027000

Page 37

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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Contents This Document Contains Important Information Installation/Service ManualTable of Contents Table of Contents cont’d Compressor Operates Continuously but does not Form Troubleshooting Refrigeration SystemSafety Information Page This page Left Blank Intentionally Unit Description General DescriptionWarranty Reference Information Theory of Operation Flow Diagram FIVE-FLAVOR Unit with BUILT-IN Cold Carbonator Flow Diagram SIX-FLAVOR Unit with BUILT-IN Cold Carbonator This page Left Blank Intentionally Identification of LOOSE-SHIPPED Parts Unpacking and InspectionConnecting Plain Water Source Lines to Unit Installing UnitSelecting Location Cutting Hole in CountertopSyrup Inlet Supply Line Connections SIX-FLAVOR Unit Shown Connecting Syrup Source Lines to Unit Preparing Unit for Operation Connecting CO2 Source Line to UnitSealing Unit Base to Countertop Fill Water Tank and Start Refrigeration SystemUnit Unit OperationAdjust WATER-TO-SYRUP Ratio Brix of Dispensed Product 312027000 Daily PRE-OPERATION Check Operating ControlsCleaning and Sanitizing AdjustmentsUnit Operation Replenishing CO2 SupplyChecking ICE Water Bath Cleaning CO2 GAS Check ValvesSanitizing Syrup Systems This page Left Blank Intentionally Preparing Unit for SHIPPING, STORING, or Relocating Front Access Panel RemovalHood and Front Panel Removal Periodic InspectionDispenser Components SF-1 Dispensing Valve Adjusting Dispensing Valves Water Flow RateUF-1 Dispensing Valve Adjusting WATER-TO-SYRUP Ratio Brix of Dispensed Product Cleaning DROP-IN Refrigeration Assembly Condenser Coil Cleaning Water Tank Water Tank Wash Syrup Systems Sanitizing POST-MIX Syrup SystemsFlush Syrup Systems Water Flush Syrup Systems Sanitize Syrup SystemsPurge Water OUT of Syrup Systems Restore Operation 312027000 Water Strainer Screen and DOUBLE-LIQUID Check Valve Liquid Check Valve Assembly Syrup Flavor Change Cleaning CO2 System CO2 GAS Check ValvesSyrup Tank System BAG-IN-BOX Syrup SystemWiring Schematic for Electronic ICE Bank Control Optional 560001023 301112002 301112002 Wiring Diagram SF-1 Dispensing Valve This page Left Blank Intentionally WATER-TO-SYRUP Ratio Troubleshooting POST-MIX System SystemTOO LOW or TOO High Carbonation TOO LOW Dispensed ProductComes OUT Dispensing Valve Clear But Foams in CUP or GlassLeaves Dispensing VALVE.CONT’D No Product Dispensed Produces Foam AS ITFrom ALL Dispensing ValvesTroubleshooting Refrigeration System Continuously but does Compressor OperatesNot Form Sufficient ICE Bank Agitator Motor notWarranty Page One Cornelius Place Anoka, Minnesota 612 800
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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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