Yearly Or After Water System Disruption); Servicing Carbonator Water Pump Water Strainer Screen; Servicing Carbonator Water Pump Double Liquid Check Valve - Cornelius FCB POST-MIX DISPENSER Installation & Service Manual

YEARLY OR AFTER WATER SYSTEM DISRUPTION)

WARNING: The carbonator water pump water strainer screen and 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 defective screen would allow foreign particles to foul the
double liquid check valves. CO
hazard in water system.

SERVICING CARBONATOR WATER PUMP WATER STRAINER SCREEN

(see Figure 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. Remove lower front access panel and left-side panel as instructed for access to the water pump water
strainer screen.
5. Pull up on carbonator tank relief valve plastic cover to release CO
6. Loosen screen retainer in water pump port, then remove screen retainer and strainer screen from port.
7. Pull strainer screen from screen retainer. Clean any sediment from screen retainer and water pump port.
8. Inspect strainer screen for holes, restrictions, corrosion, and other damage. Discard damaged strainer
screen.
9. Check O-ring on screen retainer. Replace worn or damaged O-ring (P/N 315349000).
NOTE: Strainer screen should always be used otherwise particles could foul double liquid check valve.
10. Install good or new strainer screen (P/N 315348-000) in screen retainer, then screw retainer into water
pump port and tighten securely.
11. Proceed to SERVICING CARBONATOR WATER PUMP DOUBLE LIQUID CHECK VALVE.

SERVICING CARBONATOR WATER PUMP DOUBLE LIQUID CHECK VALVE

(see applicable Figure 2 or 3 and 12)
1. Service water pump water strainer screen before servicing water pump double liquid check valve.
2. Disconnect carbonator tank water line from double liquid check valve assembly outlet.
3. Remove double liquid check valve assembly from elbow in water pump outlet port. Retain white tapered
gasket inside inlet (female) end of double liquid check valve.
4. Disassemble each check valve as shown in Figure 11.
5. Wipe each part with clean lint-free cloth. Inspect each part, especially ball for burrs, nicks, corrosion,
deterioration, and other damage. Discard ball seat and any damaged or suspicious parts and replace with
new parts during reassemble.
6. Reassemble liquid check valves as shown in Figure 11. ALWAYS INSTALL NEW BALL SEAT (QUAD
RING) P/N 312418000.
NOTE: When assembling check valves together, check to make sure valve female end with white
tapered gasket inside is on inlet side of double liquid check valve assembly.
gas could then back flow into water system and create health
2
55
pressure from tank.
2
2813