Bunn LCA-2 LCC-2 Installation And Operating Manual
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Brand: Bunn
Category: Coffee Maker
Type: Installation and operating manual for Bunn LCA-2 LCC-2
Pages: 28 (0.73 Mb)
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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)
2.5 Oz/sec (74 ml/sec) w/o flow restrictor 46 - 52 Oz ,(1360 - 1538 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 500 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 pull and hold the left dispenser handle.
4. Hold the dispense handle 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
.
Field Calibration of the Concentrate Pumps / Dispenser Flow Rates
(Continued)