Dispense Pump all Models except JDF-4D | Bunn JDF-4SB instruction

SERVICE (CONT.)

Dispense Pump (all Models except JDF-4D)

FIG. 35 DISPENSE PUMP

Location:

The Dispense Pumps are located on the platform assembly.

Removal, Inspection, and Replacement:

1.Loosen the four #8-32 x 2.45 screws securing the pump assembly to the platform.

2.Pry the two halves of the pump housing apart to reveal the pump tube and the rotor.

3.Inspect the pump tubing for signs of wear and replace every six months or as needed.

4.Inspect the pump rotor for signs of wear and replace if necessary.

5.Install the new pump tube around the rotor and position into the rear housing with the clamp rest- ing on the top edge.

6.Install the front housing to be flush with the rear housing.

7.Position the pump assembly back on the platform and secure with four #8-32 x 2.45 screws previously removed.

8.Repeat for remaining pumps.

P1640

FIG. 36 DISPENSE PUMP COMPONENTS

31	49179	110613

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Bunn JDF-4SB manual Dispense Pump all Models except JDF-4D

JDF-4D, JDF-4SB, 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.

Contents

Phone 217 529-6601 FAX 217 JDF-4D, JDF-4SB BUNN-O-MATIC Commercial Product Warranty Introduction Recommended Daily Cleaning Instructions Required Regular Maintenance Cold Water Circulation Problem Probable CauseRemedy Refrigeration Problem Probable Cause RemedyDispenser Locked Out Check for kinked flex line When dispensing. If yes, replaceContinuity Ed replace relay Water only Concentrate only 100psi Nect fittingsTray Water pressure greater than Replace control board Pump tubing Inspect, clean, or replace tubing AgeAdapter assembly Unit is not working Component Access Service Access Panels Servicecont Access Panels Dispense Platform Removal Servicecont Dispense Platform Removal Location ServiceTest Procedure Ballast JDF-2S,4S Cabinet Fan all Models Remove the four screws attaching the fan and cover assembly Location LG Compressor JDF-2S,4S,4D Design Pressures High 335 Low 88 psi Compressor Compressor GD Compressor JDF-2S,4S,4D Disconnect and remove the transformer Compressor Thermal Compressor JDF-4SB BLU/BLK Compressor Switch Compressor Switch all Models Condenser FAN Condenser Fan all Models Control Board, Main all Models Test Procedure Power Supply Circuitry To the transformer See Transformer Portion Control Board JDF-2S,4SWith a voltmeter, back probe check the voltage Source. The indication must be 24 volts ac Push Button Control Board Push Button Control Board JDF-4D Portion Control Board JDF-4D With a voltmeter Circulation Pump all Models Disconnect the two black wires from the switch Dispense Platform Switch all ModelsReturn power to the dispenser Dispense Pump Dispense Pump all Models except JDF-4D Dispense Motor all Models Reconnect the two wires to the motor as shown in Fig Dispense Valve Dispense Valve all Models Dispense Switches Dispense Switches JDF-2S, JDF-4S Cold Water Dispense Switch Cold Water Dispense Switch JDF-4S only Location Dispense Membrane Switch all Models Membrane Switch EMI Filter EMI Filter all Models Lamps & Holders Lamps, Holders and Ballasts Early Models LED Lamps JDF-2S, JDF-4S Disconnect power from the dispenserLED regulator board Rectifier Rectifier JDF-2S, JDF-4S Relay all Models Refer to to reconnect the wiresVolts ac for 120 volt models Volts ac for 230 volt models Resistor Resistor all 230V Models If voltage is present as described, proceed to #5 Solenoid Cold Water JDF-4S only 120V 1.2 kΩ 230V 3.84 kΩ Solenoid Inlet all Models 77 F 8k 10.2k Ω Temperature Probe all ModelsTemp Resistance Voltage 32 F 31.2k 34k Ω 32 F 5k Ω Temperature Sensor all Models77 F 350 Ω Transformer Terminals Transformer all Models Transformer Lited Doors JDF-2S, JDF-4S Water Q7 Compressor Relay Q25Water Q27 Water Q28 Diagram for JDF-2S LED Lited Doors Schematic Wiring Schematic Wiring Diagram JDF-4S Schematic Wiring Diagram JDF Schematic Wiring Diagram JDF-4D Schematic Wiring Diagram JDF-4D Electrical Schematic Diagram