Field Calibration of the Concentrate Pumps & Dispenser Flow Rates

(Continued)

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

5.Place a 1500 to 2000 ml graduated container under Left Dispense Tip.

6.Press & Hold the Regular dispense switch. The dispenser will display a 20 second count down timer and then stop dispensing automatically. Release the dispense switch.

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

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

The acceptable range for the volume of water collected is .95 - 1.12 liters

9.If the amount of water collected is not within the acceptable range, empty the graduated con- tainer and repeat STEPS 5 – 8.

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

11.When satisfied with the volume of water collected, press the MENU switch. The current Water Calibration volume “C3 XX” will be displayed.

12.Use the (-) / (+) keys to adjust number displayed to the amount measured in STEP 8.

Decaffeinated Coffee - Dispenser Flow Rate Calibration

Depress the MENU switch to display the Decaffeinated Coffee Flow Rate calibration menu “C4 run”. Repeat STEPS 3 – 12 above for the right side “Decaf” pump.

Field Calibrating the Empty Product Warning

The dispenser will automatically turn on the Regular or Decaf “REFILL LED”, see Operating Controls and Interface, when the corresponding container is Empty. The Refill message is triggered when the conductance sensor reading drops below the minimum setting. The factory set minimum is 600 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 container is empty or the mes- sage comes on too early and there is still concentrate left in the container, use the following procedure to find the correct Empty Product Threshold.

Calibrating The Empty Product Threshold

1.Open the dispenser door to access the digital programming module with LED display and set the Function Switch to the “Rinse” position. Leave the door open to view the LED display.

2.Place a large container under the dispenser tip, then activate and hold the Regular Coffee dispense switch.

3.Hold the dispense switch long enough to rinse all the concentrate out of the mix chamber and for the Conductance reading to stabilize and stop dropping.

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

5.Repeat steps 2, 3 & 4 for the Decaf Coffee dispenser.

6.Add 100 points to the larger of the Regular or Decaf conductance value. This is the new Empty Product threshold value for your dispenser.

7.Enter this new value into the Empty Product Alarm threshold position “P8 XXX”, see Program- ming the Dispenser.

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Bunn 38791.0000K service manual Field Calibrating the Empty Product Warning, Calibrating The Empty Product Threshold
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38791.0000K specifications

The Bunn 38791.0000K is an innovative coffee maker that has gained popularity among both home users and commercial establishments. Designed for those who appreciate efficiency and quality, this machine boasts a range of features that enhance the brewing experience.

One of the standout characteristics of the Bunn 38791.0000K is its high-capacity brewing system, which allows users to brew up to 3.8 gallons of coffee per hour. This rapid brewing capability makes it an ideal choice for settings that require a continuous supply of freshly brewed coffee, such as busy offices, cafes, and restaurants.

The coffee maker is equipped with a stainless steel water tank that maintains optimal brewing temperatures, ensuring that each cup of coffee is brewed to perfection. This consistent temperature control is crucial for extracting the full flavor from coffee grounds, resulting in a rich and aromatic brew every time.

Another key feature of the Bunn 38791.0000K is its patented brewing technology, which uses a pulse brew process. This method allows for adjustable brew times and water flow rates, giving users the flexibility to customize their brewing experience. Whether you prefer a strong, bold flavor or a milder brew, this technology caters to various taste preferences.

Additionally, the machine is designed for ease of use and maintenance. It features a simple interface, making it user-friendly for both novice and experienced coffee enthusiasts. The removable brew basket and easy-to-access water reservoir simplify cleaning and refilling, which is especially beneficial in high-demand environments.

The Bunn 38791.0000K is also equipped with a hot water faucet, allowing users to dispense hot water for tea or instant soups, further enhancing its versatility in any setting. This feature makes it a multi-functional appliance that can cater to various beverage needs.

Built with durability in mind, this coffee maker features a robust construction that withstands the rigors of daily use. Its stainless steel finish not only provides a sleek, modern look but also contributes to its longevity.

In summary, the Bunn 38791.0000K stands out in the realm of coffee makers due to its impressive brewing capacity, advanced technology, user-friendly design, and durability. Whether used in a home kitchen or a bustling cafe, it delivers coffee quickly and efficiently, ensuring satisfaction with every cup.
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