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 reca- librate the unit in the field.

Equipment Required:

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

1500 to 2000 ml graduated container.

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. (refer to Calibrating the Dis- penser)

Calibrating the Concentrate Pumps.

Regular Coffee - Left Concentrate Pump Calibration

1.Open the door of the dispenser and select PROGRAM on the Mode Selector Switch.

2.Depress and Hold the MENU switch for approximately 10 sec. The unit will display “C1 run” when it has entered the Calibration Mode.

3.Select PRIME on the Function Selector Switch.

4.Place a container under the left Dispense Tip and depress the Regular dispense switch until a steady stream of concentrate comes out the tip (5 to 10 seconds).

5.Stop priming and allow the tip to stop dripping. Discard the concentrate collected.

6.Place a 50 ml graduated cylinder under the Left Dispense Tip.

7.Press & Hold the Regular dispense switch. The dispenser will display a 20 second count down timer and then shut the pump OFF automatically. Release the dispense switch.

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

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

The acceptable range for the volume of concentrate collected is 16 - 26 ml

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

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

12.When satisfied with the volume of concentrate collected, press the MENU switch. The current Calibration volume “C1 XX” will be displayed.

13.Use the (-) / (+) keys to adjust number displayed to the amount measured in STEP 9.

Decaffeinated Coffee - Right Concentrate Pump Calibration

Depress the MENU switch to display the Decaffeinated Concentrate Pump calibration menu “C2 run”. Repeat STEPS 3 – 13 above for the right side “Decaf” pump.

Calibrating the Dispenser Flow Rates.

Regular Coffee - Left Dispenser Flow Rate Calibration

1.Select RINSE on the Function Selector Switch.

2.Press the MENU switch to display the Regular Coffee Flow Rate calibration menu “C3 run”

3.Place a container under Left Dispense Tip and depress the Regular dispense switch until a steady stream of water comes out the tip (5 to 10 seconds).

4.Stop dispensing and allow the tip to stop dripping. Discard the water collected

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Bunn LCC-2 service manual Decaffeinated Coffee Right Concentrate Pump Calibration
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LCC-2 specifications

The Bunn LCC-2, LCA-2 PC, and LCA-2A are high-performance commercial coffee brewers designed to meet the demands of busy coffee shops, restaurants, and other food service establishments. These machines are known for their efficiency, durability, and advanced brewing technologies, making them popular choices in the industry.

Starting with the Bunn LCC-2, this brewer is recognized for its compact design and ease of use. It has a brewing capacity of up to 3.8 gallons per hour, ensuring that coffee is ready quickly during peak hours. The LCC-2 uses a pour-over brewing method, which means that water is heated to the ideal brewing temperature and then poured over coffee grounds for optimal extraction. One of its standout features is the digital temperature control, which allows operators to adjust brewing temperatures easily for different coffee types. Additionally, the Bunn LCC-2 features a stainless steel construction that enhances durability and provides a sleek look for any commercial kitchen.

Moving on to the Bunn LCA-2 PC, this model includes programmable capabilities, making it perfect for establishments that require consistency and convenience. The LCA-2 PC allows users to preset brewing schedules and customize brew cycles, ensuring that each pot of coffee meets specific flavor profiles. This model is designed with a large-capacity brewing system that can produce up to 7.5 gallons of coffee per hour, making it an ideal choice for high-demand environments. It also boasts a built-in hot water faucet, which provides instant hot water for other beverages or culinary applications. The LCA-2 PC's advanced brewing automation helps maintain optimal brew quality while minimizing waste.

Lastly, the Bunn LCA-2A is an advanced version that focuses on automation and efficiency. This brewer features a state-of-the-art digital brew timer, which allows precise control over brew times, leading to consistent flavor extraction. The LCA-2A also integrates with Bunn’s patented brewWISE technology, which tracks brew recipes and monitors performance. The intuitive interface allows for easy operation, even for staff who may be less experienced with coffee brewing. With a capacity of up to 4 gallons per hour and a durable stainless steel frame, the LCA-2A ensures longevity while delivering exceptional coffee.

In summary, the Bunn LCC-2, LCA-2 PC, and LCA-2A represent the pinnacle of commercial coffee brewing technology. Their unique features, including programmable settings, large brewing capacities, and durable constructions, cater to the diverse needs of the food service industry. Each model emphasizes convenience, flexibility, and quality, making them invaluable assets in any professional coffee environment.
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