Bunn AF PR-3 service manual #3#1, Vacuum Switches

Page 15

SERVICE (cont.)

VACUUM SWITCHES

 

 

P1505

 

FIG. 16 VACUUM SWITCHES

 

 

 

 

Location:

The vacuum switches are located inside autofill box, mounted on the left side of the mounting bracket.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect flavor input lines.

3.Disconnect white/red, red/black or the brown/black wires on the vacuum switch.

4.Check for continuity across the switch leads.

If continuity is present as described, the vacuum switch is operating properly.

If continuity is not present as described, without a vacuum generated by a empty product concentrate, replace the vacuum switch.

Removal and Replacement:

1.Disconnect dispenser from the power source.

2.Remove the four thumb screws securing the right side pump head to the right side pump.

3.Disconnectthe inputtubefromthepumpto vacuum switch to be removed.

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

5.Disconnect the yellow and white wires from the pump.

6.Remove pump and bracket as an assembly.

7.Disconnect the input tubes from the vacuum switch to be replaced.

8.Disconnect the wires on the vacuum switch to be removed.

9.Remove the two #4-40 screws securing the vacuum switch to the bracket. Remove and discard switch.

10.Using two #4-40 screws secure the new vacuum switch to the bracket.

11.Refer to Fig 17 and reconnect the wires.

12.Install pump and bracket over the two studs on the bottom of main panel and secure with two #8-32 keps nuts.

13.Install the pump head with tubes on the back of the pump and secure with four thumb screws.

14.Reconnect the yellow and white wires to the pump.

15.Connect the input hose from the pump to the new vacuum switch.

WHI/RED from Refill ON/OFF Switch #3

WHI/RED to Circuit Board J4-2

RED/BLK from Refill ON/OFF Switch #1

RED/BLK to Circuit Board J4-5

#3#1

BRN/BLK from Refill ON/OFF Switch #2

BRN/BLK to Circuit Board J4-4

#2

FIG. 17 VACUUM SWITCH TERMINALS

P1527

 

15

28791.1 011500

 

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Contents Bunn AF PR-2 AF PR-3 Warranty IntroductionUser Notices Initial SET-UP Electrical RequirementsElectrical Hook-Up Cleaning TroubleshootingRecommended Weekly Cleaning Main Power ON/OFF Refill Circuit 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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