Dispenser Flow Rate Calibration. Bunn LCA-2 IC

Field Calibration of the Concentrate Pumps / Dispenser Flow Rates

(Continued)

Dispenser Flow Rate Calibration

13. Press Down Arrow Key to display the CAL LF WTR FLO menu screen.

14. Place a 64 Oz (2000 ml) graduated container under Left Dispense Tip and Pull the Left Dispense Handle momentarily. The dispenser will dispense water for 20 seconds and then shut OFF automatically.

15. Keep the graduated container under dispense tip until all the water stops dripping.

16. Measure the volume of water collected in the graduated container.

Acceptable ranges for the volume collected

_____Dispenser Flow Rate___________ ____Volume Collected____

1.8 Oz/sec (53 ml/sec) w/ flow restrictor 32 - 38 Oz, (946 - 1124 ml)

17. If the amount collected is not within the acceptable range, empty the graduated container and repeat

STEPS 14 – 16

18. If the amount collected is still not within range, inspect the dispense valves, tubing and mix chamber for lime, kinks or other obstructions.

19. When satisfied with the volume of concentrate collected, press the Down Arrow Key.

20. The CAL LF WTR VOL screen will be displayed. Use the (-) / (+) keys to adjust number displayed to the amount measured in STEP 16.

21. Press Down Arrow Key again to exit the CAL LEFT SIDE functions.

Calibrating the Right Side Dispenser

Repeat STEPS 1-21 above for the “CAL RIGHT SIDE” menus.

Field Calibrating the Empty BIB Warning

The dispenser will automatically turn on the Left or Right “REFILL LED”, see Operating Controls and Interface, when the corresponding BIB is Empty. The Refill message is triggered when the FlavorGard TM sensor reading drops below the minimum setting. The factory set minimum is 250 and should be correct for most locations.

However, in some areas the hardness of the local water supply may effect this reading. If the Refill message doesn’t come on when the BIB is empty or the message comes on too early and there is still concentrate left in the BIB, use the following procedure to find the correct Empty BIB threshold.

Calibrating The Empty BIB Threshold

1. Remove the lower splash guard assembly to access the digital programming module with LCD display.

2. Open the cabinet door and set the Function Switch to the “Rinse” position. Close the door.

3. Place a large container under the Left dispenser tip, then activate and hold the left dispenser.

4. Dispense long enough to rinse all the concentrate out of the mix chamber and for the Conductance reading to stabilize and stop dropping.

5. Record the nominal Conductance value displayed. (NOTE: It is typical for this value fluctuate (+/- 25) points about the nominal value}. This is the conductance reading of the water in your area.

6. Repeat steps 3, 4 & 5 for the Right dispenser.

7. Add 100 points to the larger of the Left or Right side Conductance value. This is the new Empty BIB threshold value for your dispenser.

8. Enter this new value into the Empty BIB Alarm threshold, see Programming the Dispenser.

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