Bunn 38791.0000K service manual Calibrating the Dispenser Flow Rates

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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.

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 Dispenser)

Calibrating the Concentrate Pumps.

Regular Coffee - 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 - 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 - 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).

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Contents LCA-2 LP Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Contents User Notices 00656.0001 37881.0000 11646.0002 00824.0002Introduction Electrical RequirementsPlumbing Requirements Initial SET-UP Plumbing HOOK-UP Early ModelsPlumbing HOOK-UP Late Models Turn on the water supply and check for leaksElectrical HOOK-UP Operating Controls and InterfacePage Installing Pump Tubing Installing the Pump TubingInitial Fill & Heat Rinse Alarm Feature Alarm Level Selected Alarm ModeDisabled None Serve productDisplay Mode Description Programming the DispenserLCD Display Home ViewProgramming the Dispenser Display Mode 0 06 0 LC xProgram Mode Description 1 8Programming the Dispenser Programming the Dispenser Program Mode LCD Display Program Mode DescriptionLC 0 x Right Decaf Dispense TotalPriming the Concentrate Lines Draining the HOT Water TankOperating the Dispenser Cleaning & Preventative Maintenance General Cleaning and Sanitizing Procedures Daily RinsingDaily Parts Washing Weekly SanitizingPreventive Maintenance Replacing the Pump TubingC1 r u n C1 2C2 r u n C2 2C4 r u n C4 1C6 2 0 C7 En gTroubleshooting Guide Error CodesError EC 0 0Troubleshooting Guide Error Codes 0 1Calibrating the Dispenser Flow Rates Field Calibrating the Empty Product Warning Calibrating The Empty Product ThresholdSchematic Wiring Diagram LCA-2 LP COM N.O

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.

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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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