Field Calibration of the Concentrate Pumps / Dispenser Flow Rates

The factory set Default Values for the Pump & Dispenser Flow Rates are very accurate and typically do not need to be field calibrated. However, if the mix ratio accuracy is ever in question, this procedure can be used to recalibrate the unit in the field.

Equipment Required:

50 to 100 ml graduated cylinder, with 1 ml graduations.

64 Oz (2000 ml) graduated container.

Remove the lower splash guard assembly to access prior to starting this procedure

NOTE: You can calibrate either the Concentrate Pump or the Dispenser Flow Rate independently. Simply scroll through the menu screen to the desired section and perform only those steps.

Calibrating the Left Side Dispenser

Concentrate Pump Calibration

1.Select PRIME on the Function Selector Switch. (refer to Priming the Concentrate Lines).

2.Place a container under the Left Dispense Tip and prime the concentrate lines until a steady stream of concentrate comes out the tip (approximately 10 seconds).

3.Stop the Priming and allow the tip to stop dripping. Discard the concentrate collected.

4.Select NORMAL on the Function Selector Switch.

5.Locate the programming module and use the Arrow Down key to scroll through LCD screens until CAL LEFT SIDE appears and press the YES button.

6.The CAL LEFT PUMP menu screen will be displayed. Place a 50 ml graduated cylinder under Left Dispense Tip and activate the Left Dispenser momentarily. The dispenser will run the Left Concentrate Pump for 20 seconds and then shut OFF automatically.

7.Keep the graduated cylinder under dispense tip until all the concentrate has dripped out.

8.Measure the volume of concentrate collected in the graduated cylinder.

Acceptable ranges for the volume collected

Tubing Size

Volume Collected

3/16” tubing

40

- 47 ml.

1/8” tubing

17

- 22 ml

9.If the amount collected is not within the acceptable range, empty the graduated cylinder and repeat STEPS 6 – 8.

10.If the amount collected is still not within range, replace the pump tubing with a new Tube Kit, (refer to the Tube Replacement Instructions).

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

12.The CAL LF PUMP VOL menu screen will be displayed. Use the (-) / (+) keys to adjust number displayed to the amount measured in STEP 8.

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Bunn LCA-2 PC, LCC-2 manual Calibrating the Left Side Dispenser
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LCA-2 PC, LCA-2, LCC-2 specifications

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