Bunn JDF-4S service manual Dispenser USE, Portion Control Option Mechanical Switch Machines

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OPERATING CONTROLS (Continued)

DISPENSER USE

Press and Hold Dispensing:

1.Place a cup on the drip tray beneath the desired dispensing nozzle.

2.Press and hold the “Product Dispense” switch until the beverage reaches the desired level, then release.

Portion Control Option (Mechanical Switch Machines)

The dispenser is also equipped with a portion control option. The following steps will guide you through the set up process for this option. Portion control can be set on one or all dispense heads as needed.

1.Unplug dispenser from power source.

2.Set the Program Switch (near main control board) to the ON position. (On older models without program switch, set the Dispense Lockout Switch to the OFF position)

3.Remove drip tray and splash panel from the front of the machine then replace the drip tray.

4.Press and hold the left most (Station 1) dispense switch while plugging the dispenser into the power source. Continue holding dispense switch(s) until all 4 temperature LED’s, Figs. 12 and 13 on the circuit board start flashing slowly (this takes about 5 seconds). Release dispense switch(s).

5.Press and release any dispense switch 6 times to enter the portion control set up mode. This will cause the 4 temperature LED’s to flash rapidly.

6.Place a container under the desired dispense nozzle to measure the portion size.

7.Press and hold the desired dispense switch to dispense product until the desired amount of product is achieved. (Maximum dispense time is 25 seconds). Repeat this on all dispense heads as desired.

8.Set the Program Switch (near main control board) to the OFF position. (On older models without program switch, set the Dispense Lockout Switch to the ON position)

9.Place a container under the dispense nozzle(s) and press the dispense button to confirm that the portion size is set correctly. Repeat steps 1-8 if any changes are needed.

10.Replace splash panel.

Note: The portion control dispense can be cancelled during a dispense by pressing the dispense button again.

Note: If a portion size is not set for a dispense head while in the portion control set up mode, that dispense head will remain a push and hold dispense head.

Push and Hold Membrane Switch Machines

1. To set single portion sizes on a push and hold membrane type dispense switch, follow steps 1 - 10 above.

Portion Control Option (Membrane Switch Machines)

Portion sizes are preset but can be adjusted by following these steps below.

1.Set the Program Switch (near main control board) to the ON position. (On older models without program switch, set the Dispense Lockout Switch to the OFF position)

2.Press and hold the large and medium buttons on the left most (Station #1) dispense station until you hear the machine "beep".

3.Place a measuring container under the station to be adjusted, then press and hold the apprpriate dispense switch until the desired amount is dispensed. The machine will record the amount of time that the button is pressed continously. If the button is released too soon, simply empty the container and start over.

4.Repeat step 3 for all stations as desired.

5.Turn the program switch to the OFF position.

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Contents JDF-2S JDF-4S Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Contents User NoticesElectrical Requirements Initial SET-UPCE Requirements Plumbing RequirementsDoor Cover Installation Secure the door cover using 5 screws providedInitial Fill Plumbing HookupPlumbing Connections JDF-2S Plumbing Connections JDF-4S Initial Fill Hose JDF-2S Initial Fill Hose JDF-4SFrozen Concentrates LoadingInitial Fill Ambient Concentrates OptionalPriming Refrigeration SwitchProduct Dispense Switch Mechanical Switch Machines Operating ControlsDispense Lockout Switch Product Dispense Switch Membrane Switch MachinesDispense Lockout Switch JDF-2S shown Program Switch JDF-2S shownPortion Control Option Membrane Switch Machines Portion Control Option Mechanical Switch MachinesPush and Hold Membrane Switch Machines Dispenser USETemperature LEDs JDF-4S Temperature LEDs JDF-2S Late ModelsCleaning & Preventive Maintenance Daily Rinse ProcedureAnnually Replace Pump Tubing Cleaning Monthly Clean Condenser CoilsOpen dispenser door Pump Speed Adjustment Adjustment & Optional SettingsWater Flow Testing and Adjustment Brix %Adjustment & Optional Settings Temperature Compensated Refractometer MethodAdjustment & Optional Settings Dispenser Lockout LED # Circuit Board LED Indicators JDF-2S Early ModelsFunction List LED Color IlluminatesJDF-4S Probable Cause TroubleshootingProblem RemedyRefrigeration TroubleshootingCompressor ON/OFF switch Dirty condenser filter or fins Space around machineProblem Probable Cause Remedy Concentrate only Water onlyTray Initial fill/setupNect fittings Water pressure greater thanProblem Probable Cause Coolant Schematic Diagram Schematic Wiring Diagram JDF-2S Schematic Wiring Diagram JDF-2SSchematic Wiring Diagram JDF-4S Schematic Wiring Diagram JDF-4SQuick Setup Guide JDF-2S and JDF-4S JDF-2S shown Shown.See Initial Fill
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JDF-4S specifications

The Bunn JDF-4S is a high-performance commercial coffee brewer designed to meet the needs of busy coffee shops, restaurants, and other establishments requiring a reliable and efficient coffee brewing solution. This versatile machine boasts an array of advanced features and technologies, making it a prominent choice among professionals in the coffee industry.

One of the most notable features of the Bunn JDF-4S is its ability to brew up to 4 gallons of coffee per hour, ensuring that establishments can keep pace with high-demand environments. This capacity makes it an ideal choice for venues that experience peak periods of coffee consumption, minimizing wait times for customers. The machine is designed with a multiple-brew option, allowing users to select various brew methods, which can cater to diverse customer preferences.

The JDF-4S incorporates Bunn’s patented brewing technology, which utilizes a precision-controlled process to ensure optimal flavor extraction. The brewed coffee is delivered at an ideal temperature, typically between 195°F and 205°F, promoting maximum taste and aroma. The machine also features a programmable digital controller that enables users to set specific brew times and adjust water temperature settings to achieve consistent results.

Another significant characteristic of the Bunn JDF-4S is its durability and ease of use. Constructed with high-quality materials, the machine is built to withstand the rigors of daily operation. The user-friendly interface features a simple touchpad design for easy navigation and programming. Additionally, the machine includes a built-in diagnostics program, helping users quickly identify and troubleshoot potential issues, thereby minimizing downtime.

The JDF-4S also offers flexible brewing options, including iced coffee brewing, enhancing its versatility. It is compatible with Bunn’s extensive range of coffee and tea dispensers, allowing businesses to expand their beverage offerings effortlessly. Furthermore, the unit features an easy-access water reservoir for quick refilling and reduced wait times during busy service periods.

In terms of maintenance, the Bunn JDF-4S is designed with user convenience in mind. The machine includes a rinse and clean cycle to ensure optimal hygiene and coffee quality. Integrated clean alerts guide users through the cleaning process, promoting regular upkeep and ensuring the longevity of the brewer.

In summary, the Bunn JDF-4S represents a cutting-edge solution for coffee brewing that prioritizes performance, versatility, and ease of use. With its advanced brewing technology, user-friendly features, and robust construction, it offers an exceptional choice for businesses seeking to serve high-quality coffee efficiently.
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