Bunn FMD-5, FMD-4 service manual Solenoid Valve Cold Water Optional, Cold Water Solenoid Valve

Page 34

SERVICE (cont.)

SOLENOID VALVE (COLD WATER - OPTIONAL)

J1

J2

J4

J3

J1

J2

J4

J3

P2635

FIG. 29 COLD WATER SOLENOID VALVE

Location:

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

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white and white/yellow wires from the solenoid valve. With the “HOT/COLD” switch in the "COLD" (upper) position press the left dis- pense switch on front of the door.

3.With a voltmeter, check the voltage across the white and white/yellow wires. Connect the dis- penser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models, three wire 120/208 volt, and 120/240 volt models.

b)240 volts ac for two wire 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 Diagrams 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 white/yellow 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 "HOT/ COLD" switch in the "COLD" (upper) position press the left dispense 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 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 white/yellow wires 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 se- curing 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. 30 when reconnecting the wires.

WHI/YEL to Hot/

Cold Switch

WHI to Main Wiring

Harness

P1215

FIG. 30 COLD WATER SOLENOID TERMINALS

34

35135 012103

 

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217User Notices BUNN-O-MATIC Commercial Product WarrantyIntroduction FMD-428368.0000 00831.0000FMD-4 FMD-5 Electrical HOOK-UP Initial SET-UPElectrical Requirements Plumbing RequirementsRunning a Rinse Sequence Liquid Level Control Rinse TimersInitial Fill & Heat Dispenser USECold Beverage SET-UP Optional CleaningAdjustments Hopper Motor Speed ProgramingDraining the HOT Water Tank Product will not dispense TroubleshootingProblem Probable CauseProbable Cause Remedy Dripping from dispense tip Lime build-up Problem Probable CauseStat for testing procedures. See LeaksRefer to Operation Rinse Timer. See Product overflows container Dispense SwitchWeak product Water Temperature Tip with a thermometer. ReadingTroubleshooting Problem Contents ServiceComponent Access Auger Drive Components FMD-4Spacer Auger Motor Hopper Base Dust Seal Washer Hopper LidRetainer Clip Panel To the rear of the auger motor mounting panel Auger Drive Components FMD-4Location Locknut Auger Drive Components FMD-4 & FMD-5Bushing Panel Auger Drive Shaft Hopper Dust SealRemove dust seal 17 from auger motor Refer to and reconnect the wires Ballasts FMD-4 & FMD-5Control Thermostat LocationControl Board Control BoardService Control Board Connectors FMD-4 Dispense Switchs FMD-4 & FMD-5FMD-5 Dispense Switches Dispense Switch TerminalsFAN FANFrother and Whipper Motor FMD-4 shown & FMD-5 ComponentsWhipper Motor Terminals INCREASE/DECREASE Switch INCREASE/DECREASE SwitchLamp Holders Lamp Replacement Refer to FigDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Replacement Refer to Lamp Starter and Socket Refer to LocationLimit Thermostat Limit ThermostatBLK from Main Harness BRN/BLK to RINSE/RUN SwitchBoard J2-3 HOT/COLD Switch Optional HOT/COLD SwitchSolenoid Valve Cold Water Optional Cold Water Solenoid ValveDispense Solenoid Valve Solenoid Valve Dispense FMD-4 & FMD-5 Dispense Solenoid Valve TerminalsSolenoid Valve Inlet Inlet Solenoid ValveTank Heater Main Harness ThermostatTank Heater Switch Pull component bracket out the front of the dis Tank Heater Relay 120V Dispensers onlyIf the resistance measures as described, proceed to step WHI from BLK from Main Harness TransformerRemove and discard the transformer WHI/GRN fromSchematic Wiring Diagram FMD-4 Single PHASE, 60HZ Schematic Wiring Diagram FMD-5 Single PHASE, 60HZ
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FMD-4, FMD-5 specifications

The Bunn FMD-5 is a state-of-the-art coffee dispenser designed specifically for high-volume coffee brewing situations. This machine is ideal for restaurants, convenience stores, and other establishments that require an efficient and reliable coffee dispensing solution.

One of the primary features of the Bunn FMD-5 is its ability to brew and serve fresh, hot coffee with exceptional speed. The unit is capable of dispensing up to five gallons of coffee per hour, making it an ideal choice for busy environments where customer demand is high. The system utilizes a digital brewer control that allows for precise brewing temperatures and times, ensuring consistency in flavor and quality.

The FMD-5 also incorporates advanced technologies to streamline the brewing process. It features a programmable control panel that allows users to adjust settings based on their specific needs. This includes the ability to set brew cycles, control brew levels, and even program different brew strengths. The easy-to-read digital display shows real-time information, making it simple for operators to monitor the brewing process.

Another notable characteristic of the Bunn FMD-5 is its compact and space-saving design. Despite its robust brewing capacity, the unit is designed to fit easily in various retail and foodservice environments. The machine is also built with durable materials, ensuring longevity and reliability under heavy usage.

For maintenance, the FMD-5 is designed with user convenience in mind. It features removable components and accessible areas for easy cleaning and routine maintenance. Users can also benefit from preventative maintenance features that monitor the machine’s performance, alerting operators to any potential issues before they escalate.

In terms of versatility, the Bunn FMD-5 can accommodate different brewing systems and coffee types, allowing users to customize their offerings based on customer preferences. It supports pre-ground coffee and can also be adapted for different brewing styles, enhancing its usability in various coffee service environments.

Overall, the Bunn FMD-5 is an impressive combination of speed, efficiency, and flexibility, making it an excellent choice for any operation that demands high-quality coffee with minimal wait time. Whether you are serving a morning rush of customers or maintaining a steady stream of coffee through the day, the Bunn FMD-5 stands out as a reliable and efficient coffee dispensing solution.
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