Cornelius R-134A service manual

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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