Bunn AF PR-3 service manual VACUUM/SUPPLY Pump Assembly

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SERVICE (cont.)

VACUUM/SUPPLY PUMP ASSEMBLY

P1560

FIG. 16 VACUUM/SUPPLY PUMP ASSEMBLY

Location:

The vacuum/supply pumps are located inside the autofill box.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the white wire from the pump lead and the yellow, orange or red wire from the other lead.

3.Check the voltage across the white wire and yellow, orange or red wire with a voltmeter. Connect the dispenser to the power source. Push the pump (flavor) switch for the pump to be tested. The indication must be :

a)120 volts ac for two wire 120 volt models.

b)200 to 240 volts ac for two wire 200 or 240 volt

models.

If voltage is present as described, replace the pump. If voltage is not present as described, refer to the wiring diagrams and check the main wiring harness.

Pump Removal and Replacement:

1.Disconnect the wires from the pump leads.

2.Disconnect the input and output tubes.

3.Remove the four thumb screws securing the pump head to the pump body, discard pump head with tubes.

4.Remove the two #8-32 keps nuts securing the pump to the main mounting panel.

5.Remove the two #6-32 screws securing the pump body to the mounting bracket.

6.Remove pump body and discard.

7.Install new pump assembly on the pump mounting bracket and secure with two #6-32 screws.

8.Remove the four thumb screws securing the new pump head with hoses to the new pump body.

9.Using two #6-32 screws mount the pump body on the pump mounting bracket.

10.Using two #8-32 keps nuts mount the pump body and bracket to main panel.

11.Install new pump head with hoses to the rear of the pump body and secure with four thumb screws.

12.Connect the input and output tubes using new hose clamps.

13.Refer to Fig 17 and reconnect the wires.

WHI from Main Harness

 

YEL from Pump Switch #1

 

WHI from Pump #1

 

ORN from Pump Switch #2

 

WHI from Pump #2

 

RED from Pump Switch #3

 

FIG. 17 VACUUM/SUPPLY PUMP TERMINALS

P1526

 

13

28791.1 011500

 

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Contents Bunn AF PR-2 AF PR-3 Introduction WarrantyUser Notices Electrical Requirements Initial SET-UPElectrical Hook-Up Troubleshooting CleaningRecommended Weekly Cleaning Refill Circuit ON/OFF Main Power ON/OFFProbe Control BOX LOW/OFF/HIGH Problem Probable Cause Remedy TroubleshootingComponent Access ServiceCircuit Board Circuit BoardFuse Holder Fuse and Fuse HolderMain ON/OFF Switch ServiceProbe System Refer to when reconnecting the wires#3 AFPR-3 only Refill SwitchesVACUUM/SUPPLY Pump Assembly VACUUM/SUPPLY Pump AssemblyHead cavity VACUUM/SUPPLY Pump Tube Installation#3#1 Vacuum Switches28791.1 28791.1

AF PR-3 specifications

The Bunn AF PR-3 is a high-performance coffee brewer designed for commercial use, particularly in cafés, restaurants, and other settings where quality coffee must be brewed quickly and efficiently. Known for its exceptional reliability and innovative features, the Bunn AF PR-3 has become a popular choice among coffee professionals.

One of the standout features of the AF PR-3 is its ability to brew up to 3 gallons of coffee per hour. This capacity makes it ideal for busy environments where a quick turnaround is essential. The brewer uses a patented technology that ensures optimal brewing temperature and extraction time, resulting in a rich, full-bodied flavor profile in each cup.

Another significant aspect of the Bunn AF PR-3 is its automatic features. With a programmable digital display, users can easily select brew settings and adjust individual preferences. This user-friendly interface simplifies operation and allows baristas to focus on crafting the perfect coffee every time. The unit also comes with a built-in hot water faucet that enables the brewing of other beverages, such as tea or instant soups, further enhancing its versatility.

Additionally, the Bunn AF PR-3 incorporates advanced brewing technology, including its unique "infusion" brews system. This system allows water to saturate coffee grounds evenly, promoting even extraction. As a result, the coffee brewed with the AF PR-3 exhibits a well-balanced taste with vibrant aroma, catering to the sophisticated palate of coffee aficionados.

Durability is another characteristic of the Bunn AF PR-3. The brewer is built with high-quality stainless steel, making it resistant to wear and tear, and ensuring that it can withstand the demands of a bustling café environment. The machine's components are designed for easy maintenance, allowing operators to clean and service the brewer with minimal downtime.

Moreover, the Bunn AF PR-3 is energy efficient, designed to reduce energy consumption without compromising performance. This feature not only helps in keeping operational costs down but also makes it an environmentally friendly choice for coffee businesses.

In conclusion, the Bunn AF PR-3 is a leading coffee brewer that combines speed, quality, and user-friendly technology, making it an essential piece of equipment for any commercial coffee establishment. Its ability to brew large quantities of rich, flavorful coffee efficiently, along with its durability and ease of operation, solidifies its position as a top contender in the coffee brewing market.
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