Yearly Or After Water System Disruption; Servicing Carbonator Water Pump Water Strainer Screen - Cornelius R-404A REFRIGERANT Service Manual

38. After carbonator water pump cycles off, intermittently pull and release No. 1 freeze cylinder faceplate relief
valve. This bleeds CO
39. Open No. 2 product blender tank product shutoff valve.
40. Press both ''AUTO 1'' and ''AUTO 2'' switches to start both freeze cylinders beaters and refrigeration sys-
tem. Product will be ready for dispensing in approximately 10 minutes.
41. Install right-hand side panel and lower front access panel by reversing removal procedure.
42. Service water pump water strainer screen before servicing water pump double liquid check valve.
43. Disconnect carbonator tank water line from double liquid check valve assembly outlet.

YEARLY OR AFTER WATER SYSTEM DISRUPTION

WARNING: The carbonator water pump water strainer screen and the double liquid check
valve must be Inspected and serviced after any disruptions (plumbing work, earthquake,
etc.) to the water supply system, and at least once a year under normal circumstances.
Water pump with no strainer screen or a defective screen would allow foreign particles to foul the
double liquid check valve. CO
hazard in the water system.

SERVICING CARBONATOR WATER PUMP WATER STRAINER SCREEN

(see Figure 2 and 12)
1. Press ''OFF 1'' and ''OFF 2'' switches to stop freeze cylinders beaters and refrigeration systems.
2. Disconnect electrical power from Unit.
3. Close CO cylinder and water inlet supply line shutoff valve.
2
4. Using a flat blade screwdriver, turn lock counterclockwise to unlock the front access door (see Figure 5),
then open the door.
5. Remove back panel as instructed for access to the water pump water strainer screen.
6. Pull up on carbonator tank relief valve plastic cover to release CO
7. Loosen screen retainer in water pump port, then remove screen retainer and strainer screen from the port.
8. Pull strainer screen from the screen retainer. Clean any sediment from the screen retainer and the water
pump port.
9. Inspect strainer screen for holes, restrictions, corrosion, and other damage. Discard damaged strainer
screen.
10. Check O-ring on screen retainer. Replace worn or damaged O-ring (P/N 315349000).
Note: A strainer screen should always be used, otherwise particles could foul the double liquid check
valve.
11. Install good or new strainer screen (P/N 315348000) in screen retainer, then screw retainer into water
pump port and tighten securely.
12. Proceed to SERVICING CARBONATOR WATER PUMP DOUBLE LIQUID CHECK VALVE.
312028000
from freeze cylinder and allows product to enter and fill cylinder.
2
gas could then back flow into the water system and create a health
2
pressure from tank.
2
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