SERVICE (cont.)

SOLENOID VALVE (COLD WATER

OPTIONAL)(FMD-2 ONLY)

J1

12

J1

J2

J4

J3

P1666

FIG. 34 COLD WATER SOLENOID VALVE

Location:

The cold water solenoid valve is located on the left side of the dispenser base just behind the com- ponent bracket.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white and blue wires from the solenoid valve. With the cold jumper plug in- stalled press the left dispense switch on front of the door.

3.Check the voltage across the white and blue wires with a voltmeter. Connect the dispenser to the power source. The indication must be 120 volts ac for two wire 120 volt models, three wire 120/ 208 and 120/240 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 wiring diagram and check dispenser wiring harness.

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

If continuity is present as described, reconnect the white and blue wires to the solenoid.

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

6.Check the solenoid valve for coil action. Connect the dispenser to the power source. With the cold jumper plug installed press the left dispense switch and listen carefully in the vicinity of the solenoid valve for a “clicking” sound as the 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 line 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, replace the solenoid valve.

Removal and Replacement:

1.Loosen the two screws securing the component bracket to the dispenser base. Lift the component bracket off of the base and move to the right.

2.Remove the white and blue from the solenoid valve.

3.Turn-off the water supply to the dispenser.

4.Disconnect the water lines to and from the sole- noid valve.

5.Loosen the two #8-32 screws and washers secur- ing the solenoid mounting bracket to the base. Remove solenoid bracket and solenoid valve as an assembly.

6.Remove the two #10-32 screws and lockwashers securing the solenoid valve to the solenoid bracket.

7.Using two #10-32 screws and lockwashers install new solenoid valve on solenoid mounting bracket.

8.Install the solenoid valve and bracket on the dis- penser base and tighten the two #8-32 screws.

9.Securely fasten the water lines to and from the solenoid valve.

10.Refer to Fig. 35 when reconnecting the wires.

BLU to Main Harness

WHI to Main Wiring

Harness

P1215

FIG. 35 COLD WATER SOLENOID TERMINALS

34

29112 101598

 

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Image 34
Bunn FMD-1 FMD-2 service manual Solenoid Valve Cold Water OPTIONALFMD-2 only, Cold Water Solenoid Valve
Page 33 Page 35

FMD-1 FMD-2 specifications

The Bunn FMD-1 and FMD-2 models represent a significant advancement in the realm of coffee brewing equipment, catering to the demands of both commercial establishments and serious coffee enthusiasts. These machines are designed to efficiently brew high-quality coffee while minimizing operational complexity.

The Bunn FMD-1 is a single brewer, while the FMD-2 features dual brewing capabilities. This distinction allows the FMD-2 to meet higher coffee volume demands, making it an ideal choice for bustling cafes or restaurants where efficiency is paramount. Both models are engineered with a robust stainless steel construction, ensuring durability and longevity in high-traffic environments.

One standout feature of both models is the infusion technology. This proprietary system enhances the extraction process, allowing for optimal flavor development. The machines utilize a programmable brewing timeline, which provides users with a high level of control over the brewing variables such as time and temperature. This leads to a customizable brewing experience tailored to specific coffee blends or personal taste preferences.

Additionally, these brewers are equipped with an integrated hot water faucet, offering convenience for making tea, hot chocolate, or even instant soup. This multifunctionality improves workflow in busy kitchens, as it eliminates the need for separate hot water dispensers.

The FMD series is also designed with user-friendly interfaces. The digital display provides clear, intuitive information about the brewing process, including brew progress and maintenance alerts. This makes it easy for operators to monitor and manage the machine, ensuring consistency and quality in every cup.

Moreover, both models are designed for quick and efficient cleaning. The removable brewing components facilitate maintenance, which is crucial in a commercial setting where hygiene and equipment uptime are critical.

In terms of capacity, the FMD-1 brews up to 3.8 gallons per hour, while the FMD-2 can produce an impressive 7.5 gallons per hour, demonstrating their suitability for high-volume service.

Overall, the Bunn FMD-1 and FMD-2 models embody the perfect blend of technology, efficiency, and user-centric design, making them a valuable addition to any coffee service operation. Their ability to deliver consistent, high-quality coffee with ease is sure to enhance the customer experience and streamline operations simultaneously.
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