Bunn FMD-5, FMD-4 Location, Remove bulb from the tank, Remove temperature probe from the tank

Page 26

SERVICE (cont.)

CONTROL THERMOSTAT (FMD-1,-2,-2FD,-3,-4,-5)

FMD-3 shown

FIG. 14 CONTROL THERMOSTAT

P1445

 

Location:

 

The control thermostat (mechanical or electronic) is located inside the dispenser on the upper left side of the housing.

Test Procedure:

Mechanical Thermostat:

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire of the control thermostat from the black lead from the limit thermostat.

3.Remove bulb from the tank.

4.With a voltmeter, check the voltage across black wire on the control thermostat and the white or red wire on the tank heater with the tank heater switch in the “ON” (lower) position. Connect the dispenser to the power source. The indication must be:

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

b)208 volts ac for three wire 120/208 volt mod- els.

c)240 volts ac for two wire 240 volt models and three wire 120/240 volt models.

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

5.Disconnect the dispenser from the power source.

If voltage is present as described the control thermostat is operating properly. Reinstall bulb into the tank.

If voltage is not present as described, replace the thermostat.

Electronic Thermostat (Optional):

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire of the control thermostat from the black wire from the limit thermostat.

3.Remove temperature probe from the tank.

4.With a voltmeter, check the voltage across the black wire from the control thermostat and the white wire on the tank heater with the tank heater switch in the “ON” (lower) position. Connect the dispenser to the power source. The indication must be120 volts ac for two wire 120 volt models.

If voltage is present as described the control thermostat is operating properly. Reinstall temperature probe into the tank.

If voltage is not present as described, replace the control thermostat.

Removal and Replacement:

1.Disconnect the wires from the thermostat.

2.Remove the thermostat capillary bulb/temperature probe by firmly pulling up on the capillary grommet at the tank lid.

3.Loosen the two #8-32 screws securing the thermo- stat bracket to the upper left rear of the dispenser housing.

4.Remove thermostat bracket and thermostat as an assembly.

5.Install the new thermostat and bracket inside the dispenser housing on the upper left rear side and tighten the two #8-32 screws.

6.Slide the grommet to the line 4.5" above the bulb on the new capillary tube (mechanical thermostat only).

7.Insert the capillary bulb/temperature probe through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid.

8.Carefully bend the capillary tube so that the tube and bulb inside the tank are in the vertical position and away from any electrical connections (mechanical thermostat only).

9.Refer to Fig. 15 and reconnect the wires.

NOTE - The capillary tube must be clear of any electrical termination and not kinked.

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42672 122209

 

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Contents FMD Series Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Excluding regular maintenance itemsIntroduction Cleaning Required Regular Maintenance Problem Probable Cause Level Control Board and Probe FMD-1 ProblemProduct will not dispense RemedyProblem Probable Cause Remedy Troubleshooting Excess dust Fan Refer to Service Product overflows container Dispense SwitchInstall a regulator if necessary to Procedures. See42672 Component Access 20,23SERVICEcont Access PanelsLocation Service Auger Drive Components all ModelsTest Procedures Auger Motor Spacer Auger Motor Hopper Base Dust Seal Washer ServiceAuger Drive Components Retainer Clip Panel RED to Control BoardBushing Panel Auger Drive Shaft Remove auger drive shaft bushing from hopperRinse and dry each item thoroughly Locknut Auger Motor BracketAuxillary Control Board FMD DBC-3 only Service Auxillary Control Board Disconnect the dispenser from the power sourceService Ballast all ModelsTest Procedure Power Supply Control BoardCheck that the RINSE/RUN switch is in the Rinse position Hopper Motor Control CircuitryControl Board Using four #6-32 keps nutsConnectors on the control board Control board to the component bracketControl Board Check that the rinse/run switch is in the run posi- tion Control Board Connectors Remove bulb from the tank Remove temperature probe from the tankLocation WHI to Main Control ThermostatBLK to Main If voltage is present as described, proceed to #7 Open the dispenser door and remove the bottom door coverIf voltage is present as described, proceed to #6 FMD DBC-2FD Digital Touch Control Switch FMD DBC-2,DBC-3FMD DBC-3 Digital Touch Control Switch ConnectorsEMI Filter 230 Volt FMD DBC-3 EMI FilterVacuum FAN all Models Test ProceduresDisconnect the black and white wires from the fan terminals Frother and Whipper Motor all Models except -2FD Frother and Whipper MotorFrother and Whipper Motor Will seat inside the whipper chamberHopper Drive Board FMD-1 only Hopper Drive BoardHopper Drive Board Terminals HOT/COLD Switch Optional for FMD DBC-3 Disconnect the wires from the switch terminalsTerminals Lamp Holder all Models Door Assy Upper Panel Lamp Holders Lower PanelLamp Starter and Socket Reconnect the violet wire to terminal Level Control Board and Level Probe FMD-1 onlyLevel Board Terminals Limit Thermostat all Models Limit ThermostatOverflow Protection Switch Rinse /RUN Switch all Models RINSE/RUN SwitchSolenoid Valve Cold Water Optional for FMD-2,-3,-4,-5 Cold Water Solenoid TerminalsSolenoid Valves Dispense all Models Dispense Solenoid Valves P1637.40 LocationHOT Water Dispense Solenoid Valve FMD-2FD,DBC-2FD,-3,DBC-3 Solenoid ValveSolenoid Valve Inlet all Models Inlet Solenoid ValveWHI or RED to Main BLK to Limit Wiring Harness Tank Heater all ModelsTank Heater Relay FMD-4,-5,120V Dispensers only BRN/BLK from WHI from Main HarnessTank Heater Switch all Models Tank Heater SwitchRemove and discard the transformer Disconnected from the main wiring harnessTransformer all Models Q5 & MOV4 Controls Right Whipper Motor Q1 & MOV1 Controls Left Whipper MotorQ2 & MOV3 Controls Center Whipper Motor Q7 & MOV2 Controls Refill ValveSchematic Wiring Diagram FMD-1 BLKSchematic Wiring Diagram FMD-1A WHI-16Schematic Wiring Diagram FMD-2 Schematic Wiring Diagram FMD-2A Schematic Wiring Diagram FMD DBC-2 Freeze Dried W/HOT Water Schematic Wiring Diagram FMD-2FD 42672 42672 42672 42672 Schematic Wiring Diagram FMD DBC-3 With HOT Water Dispense Schematic Wiring Diagram Fmda DBC-3 With HOT Water Dispense 42672 42672 42672 42672 Schematic Wiring Diagram FMD-5A
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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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