Bunn POWDER AUTO FILL service manual Pressure Regulator and Needle Valve, Adjustments

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SERVICE (cont.)

PRESSURE REGULATOR and NEEDLE VALVE

P1935

FIG. 30 PRESSURE REGULATOR

and NEEDLE VALVE

Location:

The pressure regulator and needle valve are located inside the rear panel at the bottom of the dispenser.

Adjustments:

The water pressure regulator is preset at the factory to produce 15 psi (103 kPa) of water pressure at the regulator outlet with inlet pressures ranging from 20 psi to 90 psi (138 to 620 kPa). No field adjustments of the pressure regulator should ever be necessary.

The needle valve is preset at the factory to dispense 1 fluid ounce of water per second. The dispenser is designed to accommodate various product mix ratios by adjusting the product dispense rate (see Initial Setup). Should a readjustment of the water dispense rate become necessary, proceed as follows:

1.Disconnect the dispenser from the power source.

2.Remove the six #8-32 screws securing the rear panel to the dispenser housing.

3.Turn the needle valve adjustment screw counter- clockwise to increase the water flow rate, and clockwise to decrease the water flow rate.

Removal and Replacement:

Pressure Regulator

1.Disconnect the dispenser from the power source and the water supply.

2.Remove the six #8-32 screws securing the rear panel to the dispenser housing.

3.Disconnect the .25" copper tube from the outlet of the pressure regulator.

4.Loosen the nut securing the bulkhead fitting to the dispenser.

5.Remove the bulkhead fitting from the inlet to the pressure regulator.

6.Remove the pressure regulator assembly.

7.Attach the regulator to the bulkhead fitting making sure that the copper bushing is seated properly in the regulator and tighten securely.

8.Tighten the nut securing the bulkhead fitting to the dispenser housing.

9.Attach the .25" copper tube to the regulator assem- bly and tighten securely.

10.Connect the dispenser to the water source and check for leaks. Tighten any leaking connections before installing rear panel.

Removal and Replacement:

Needle Valve

1.Disconnect the dispenser from the power source and the water supply.

2.Remove the six #8-32 screws securing the rear panel to the dispenser housing.

3.Disconnect the .25" copper tube from the inlet fitting on the needle valve.

4.Disconnect the water outlet from the solenoid valve.

5.Remove the solenoid valve and needle valve as described in section- Dispense Solenoid Valve.

6.Remove the needle valve assembly. Remove the fitting from the inlet port of the needle valve.

7.Install the fitting removed from the old needle valve onto the new needle valve using pipe thread sealant (BOM #M2526.0000).

8.Attach the needle valve to the fitting on the dispense solenoid valve using pipe thread sealant (BOM #M2526.0000) and tighten securely.

9.Install the solenoid valve and needle valve as de- scribed in section- Dispense Solenoid Valve.

10.Attach water inlet and outlet lines and tighten se- curely.

11.Connect the dispenser to the water source and check for leaks. Tighten any leaking connections before installing rear panel.

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Contents Bunn Powder Auto Fill Initial SET-UP WarrantyIntroduction User Notices Operating Instructions Adjustments Recommended Daily Cleaning and Maintenance Tips CleaningRinse and dry each item thoroughly before reas- sembling Door not closed Fault ListNormal operation Powder Auto-Fill ready to DispenseProblem Probable Cause TroubleshootingRemedy ProblemCDS product tastes watery or sugary Problem Probable Cause Remedy Product overflows CDS hopper Control Board and Probe Procedures. SeeImproper adjustment of product Install a regulator if necessary toComponent Access ServiceSpacer Dust Seal Hopper Base Auger Drive ComponentsHopper Lid Retainer ClipAuger Drive Motor Diagrams and check wiring harnessMixing Chamber Frother and MIXING/WHIPPER ChamberVolts ac for 120 volt models Volts ac for 230 volt CE models Whipper MotorWhipper Motor Install dispense tip into the bottom of the whipper chamberIf voltage is present as described, proceed to #9 If voltage is present as described, proceed to #5Test Procedure Low Product Detect Remove the control board Instal the new control board using the four #6-32 keps nutsDisconnect the wires from the switch terminals TEST/SERVICE SwitchLocation Main Power ON/OFF Switch Main Power ON/OFF SwitchRefer to when reconnecting the wires Lamp Cord AssemblyDisconnect the lamp cord from the lamp cord connector Lamp Cord ConnectorRemove new nut and washer from new lamp cord connector Close the dispenser door Lamp HOLDER/SOCKET AssemblyTransformer TransformerPotentiometer PotentiometerHopper Level Indicator Hopper Level IndicatorHopper Switch Hopper SwitchDoor Switch Door SwitchPressure Regulator and Needle Valve AdjustmentsDispense Solenoid Valve Location Dispense Solenoid ValveBLK RED Wiring Diagrams Schematic Wiring Diagram PAFWiring Diagrams Schematic Wiring Diagram Pafa

POWDER AUTO FILL specifications

The Bunn Powder Auto Fill is a cutting-edge coffee brewing system designed to enhance efficiency and precision in commercial environments. This innovative machine simplifies the brewing process by incorporating automated features that ensure consistent quality and optimal performance.

One of the standout features of the Bunn Powder Auto Fill is its ability to automatically dispense powdered beverage mixes. This is made possible through advanced technology that streamlines the process, reducing the need for manual input. With the push of a button, operators can quickly prepare a variety of specialty beverages, including cappuccinos, lattes, and flavored coffee drinks. This not only saves time but also minimizes the likelihood of human error in measurements, ensuring each cup is consistently brewed to perfection.

The Bunn Powder Auto Fill is designed with versatility in mind. It accommodates a wide range of powdered ingredients, allowing businesses to offer an extensive menu without investing in multiple machines. This adaptability makes it an ideal solution for coffee shops, convenience stores, and other establishments where customer preferences may vary.

Moreover, the machine features a robust heating system that provides rapid brewing capabilities. This ensures that beverages are served at the optimal temperature, enhancing the overall customer experience. The integrated hot water faucet allows for quick access to hot water, making it easy to prepare additional drinks or even food items like soups and oatmeal.

Durability is another key characteristic of the Bunn Powder Auto Fill. Built with high-quality materials to withstand the rigors of daily use, this machine is designed to deliver reliable performance over time. Its compact and sleek design allows for easy placement in any setting, taking up minimal counter space while blending seamlessly with existing décor.

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In conclusion, the Bunn Powder Auto Fill is a game-changer for businesses looking to elevate their beverage offerings. With its automation, versatility, reliability, and user-centric design, this machine not only boosts efficiency but also enhances the quality of every cup served. Whether in a bustling café or a busy convenience store, the Bunn Powder Auto Fill stands out as a smart investment for any beverage-focused establishment.
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