SERVICE (cont.)

SOLENOIDS

 

 

 

 

1

 

 

2

 

 

3

 

1

 

 

1

 

 

2

 

2

3

 

3

 

 

FIG. 16 SOLENOIDS

P1521

 

Location:

The solenoids are located inside the autofill box.

Test Procedure:

1.

Disconnect the dispenser from the power source.

2.

Disconnect the white/violet, violet or blue wire and

 

the white wire from the solenoid.

3.

Connect the dispenser to the power source. Press

 

the solenoid (water) switch, and with a voltmeter,

 

check the voltage between the white wire, and either

 

the blue, violet, or white/violet wire. 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

6.Check the solenoid valve for coil action. Connect the dispenser to the power source. Press the solenoid (water) switch and listen carefully in the vicinity of the solenoid valve for a “clicking” sound as the coil magnet attracts.

7.Disconnect the dispenser from the power source.

If the sound is heard as described and water will not pass through the solenoid valve, there may be a block- age in the water inlet before the solenoid valve or, the solenoid valve may require inspection for wear, and removal of waterborne particles.

If the sound is not heard as described, rebuild or replace the solenoid valve.

Solenoid Valve Repair:

1.Remove the wires from the solenoid valve to be repaired.

2.Turn off the water supply to the dispenser.

3.Remove the nut securing solenoid valve coil to the base.

4.Remove guide, washer, o-ring, plunger/spring and inspect for wear. Replace parts as required.

5.Install new o-ring in the solenoid valve base.

6.Install plunger/spring in the guide with spring to the bottom of the guide.

7.Install guide with the plunger/spring into the solenoid valve base.

8.Install washer on guide.

9.Install coil with retainer on guide and secure with nut.

10.Refer to Fig. 17 and reconnect the wires.

models.

c) 230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to the Wiring Diagrams and check dispenser wiring harness.

5.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, refer to Fig. 17 and reconnect the wires to the solenoid.

If continuity is not present as described, replace the solenoid valve.

WHI from Main Harness WHI to Solenoid #2 BLU from Solenoid Switch #1

#1 AFPO-2 & 3 #2 AFPO-2

&3 #3 AFPO-3

ONLY

WHI to Solenoid #1 WHI to Pump #1 VIO from Solenoid Switch #2

WHI/VIO from Solenoid Switch #3

WHI to Main

Harness

WHI to Pump #3

FIG. 17 SOLENOID TERMINALS

P1544

 

16

41093 040408

 

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Page 16
Image 16
Bunn AFPO-3 SL manual White wire from the solenoid, Only
Page 15 Page 17

AFPO-3 SL specifications

The Bunn AFPO-2 SL, AFPO-3 SL, and AFPO-3 are advanced coffee brewing systems that cater to the needs of commercial establishments seeking efficiency and high-quality coffee production. These machines are designed for ease of use, high throughput, and flexibility, making them ideal for coffee shops, restaurants, and workplaces.

The Bunn AFPO-2 SL is known for its dual-brew capabilities, allowing users to brew coffee and tea simultaneously. This model features a sleek, stainless-steel design that fits well in various settings. It comes equipped with an electronic controls interface that ensures precise brewing temperatures and times, enabling baristas to consistently produce flavorful coffee. The AFPO-2 SL has a brewing capacity of up to 3.8 gallons per hour, making it suitable for high-demand environments.

Another standout model is the Bunn AFPO-3 SL, which builds upon the features of the AFPO-2 SL with an increased brewing capacity of up to 4.5 gallons per hour. This model includes a programmable digital control module, which allows users to customize brew cycles for different coffee blends, enhancing versatility. The AFPO-3 SL is designed with stainless-steel construction, ensuring durability and longevity while maintaining easy cleaning and maintenance routines.

The hallmark of the Bunn AFPO-3 is its single-serve capability, which provides a fresh-brewed experience for every cup. With advanced technology that ensures optimal water temperature and flow rate, the AFPO-3 guarantees rich and robust flavors in every pour. This model is ideal for establishments that want to offer their customers a variety of coffee options without sacrificing quality or speed. It also features an intuitive user interface, allowing staff to operate the machine with minimal training.

All three models are equipped with a built-in hot water tap, providing instant access to hot water for tea or other beverages, further increasing their utility in busy environments. The Bunn AFPO series is known for its reliability, with heavy-duty components that withstand the rigors of daily use.

In summary, the Bunn AFPO-2 SL, AFPO-3 SL, and AFPO-3 represent the pinnacle of brewing technology in the commercial coffee market. With their advanced brewing capabilities, user-friendly designs, and robust construction, these machines are perfectly suited for any establishment that values quality coffee and operational efficiency.
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