Bunn FMD-5, FMD-4 service manual Tank Heater Relay 120V Dispensers only

Page 40

SERVICE (cont.)

TANK HEATER RELAY (120V Dispensers only)

J1

J2

J4

J3

J1

J2

J4

J3

P2635

FIG. 39 TANK HEATER RELAY

Location:

The tank heater relay is located behind the lower front access cover, mounted on the left rear side of the component bracket.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Place the tank heater switch in the “OFF” (upper) position.

3.With an ohmmeter, check for continuity between normally closed (NC-5) and common (COM-3) terminals of the relay. The indication must be less than 1 ohm.

6.With an ohmmeter, check for continuity between the normally closed (NC-5) and common (COM-3) terminals of the relay.

7.Place containers below any three dispense nozzles.

8.Connect the dispenser to the power source.

9.Simultaneously initiate dispenses at each of the selected dispense stations while monitorintg con- tinuity across the referenced terminals of the tank heater relay. The indication must be open circuit.

If continuity is absent as described, the relay is func- tioning correctly.

If continuity is present, replace the relay.

Removal and Replacement:

1.Loosen the three #8-32 screws securing the com- ponent bracket to the dispenser housing base.

2.Pull component bracket out the front of the dis-

penser far enough so the tank heater relay can be disconnected from the main wiring harness.

3Disconnect the tank heater relay from the main wiring harness.

4.Remove the two #8-32 screws securing the tank heater relay to the rear of the component bracket.

5.Remove and discard the tank heater relay.

6.Install new tank heater relay on the rear of the component bracket and secure with two #8-32 screws.

7.Connect the tank heater relay to the main wiring harness (see Fig. 40).

8.Place the component bracket into position and tighten the three #8-32 screws.

If continuity is present as described, proceed to step 4. If continuity is not present as described, replace the relay.

4.With an ohmmeter, check the resistance across the coil terminals (1 & 2) of the relay. The indica- tion must be approximately 4,000 ohms (4kΩ).

If the resistance measures as described, proceed to step 5.

BRN/BLK from Main Harness

BLK from Main Harness

BLK from Main Harness

WHI from Main Harness

No Connection

If the resistance does not measure as described, replace the relay.

5.Disconnect the wires from the normally closed (NC-5) and common (COM-3) terminals of the relay.

P2639

FIG. 40 TANK HEATER RELAY TERMINALS

40

35135 012103

 

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty IntroductionUser Notices FMD-428368.0000 00831.0000FMD-4 FMD-5 Initial SET-UP Electrical RequirementsElectrical HOOK-UP Plumbing RequirementsLiquid Level Control Rinse Timers Initial Fill & HeatRunning a Rinse Sequence Dispenser USECleaning AdjustmentsCold Beverage SET-UP Optional Hopper Motor Speed ProgramingDraining the HOT Water Tank Troubleshooting ProblemProduct will not dispense Probable CauseProbable Cause Remedy Problem Probable Cause Stat for testing procedures. SeeDripping from dispense tip Lime build-up LeaksProduct overflows container Dispense Switch Weak product Water TemperatureRefer to Operation Rinse Timer. See Tip with a thermometer. ReadingTroubleshooting Problem Service Component AccessContents 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 Auger Drive Components FMD-4 & FMD-5 Bushing Panel Auger Drive ShaftLocknut 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 Transformer Remove and discard the transformerWHI from BLK from Main Harness 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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