Bunn FMD-1 FMD-2 service manual Transformer FMD-2 only, WHI/GRN T7 WHI/BLK T12

Page 39

SERVICE (cont.)

BLK to Main

Harnesss

BLK from Main

Harness

P1219

FIG. 43 TANK HEATER SWITCH TERMINALS

TRANSFORMER - FMD-2 ONLY

J1

 

12

 

7

 

J1

 

J2

 

J4

 

J3

 

FIG. 44 TRANSFORMER

P1666

 

Location:

The transformer is located behind the lower front access cover, mounted on the right rear side of the component bracket.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the four pin plug from the main har- ness from the four pin connector on the trans- former.

3Check the voltage across black wire pin 1 and the white wire pin 2 on the plug from the main harness. Connect the dispenser to power source. The indi- cation must be:

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

b.120 volts for three wire 120/208 volt models and three wire 120/240 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described reconnect the plug and the connector and proceed to #5.

If voltage is not present as described, refer to the wiring diagrams and check the main wiring harness.

5.Check the voltage between J1-1 and J1-2 on the eight pin connector at the control board. Connect the dispenser to the power source. The indication must be 24 volts ac.

If voltage is present as described the transformer is operating properly.

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

Removal and Replacement:

1.Loosen the two #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 transformer connector can be disconnected from the main wiring har- ness.

3Disconnect the transformer four pin connector from the four pin plug on the main wiring harness.

4.Remove the two #6-32 keps nuts securing the transformer to the rear of the component bracket.

5.Remove and discard the transformer.

6.Install new transformer on the rear of the compo- nent bracket and secure with two #6-32 keps nuts.

7.Connect the four pin connector on the transformer to four pin plug on the main wiring harness.

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

WHI/GRN - T7

 

 

WHI/BLK - T12

12

 

 

11

 

 

9

 

 

8

 

 

7

 

 

WHI - 120V T2, 240V T6

 

 

BLK - TI

 

FIG. 45 TRANSFORMER TERMINALS

P1703

 

39

29112 101598

 

 

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Contents FMD-1 FMD-2 FMD-1 FMD-2 WarrantyIntroduction User Notices00656.0000 FMD-1 only28368.0001 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPRunning a Rinse Sequence Rinse Timer FMD-2 onlyInitial Fill & Heat Liquid Level ControlCold Beverage SET-UP Optional FMD-2 only CleaningAdjustments Hopper Motor Speed Adjustment FMD-1Draining the HOT Water Tank Hopper Motor Speed Programing FMD-2Probable Cause TroubleshootingProblem Product will not dispenseProbable Cause Remedy Problem Probable Cause Problem Probable Cause Remedy Dispenser is making unusual Refer to Service Lamp, see page 29 for lamp replacementAuger Drive Components FMD-1 ServiceComponent Access ContentsRetainer Clip Ing panel Retainer Clip Hopper AssemblyHopper Lid Spacer Auger Motor Hopper Base Dust Seal WasherAuger Drive Components FMD-1 To the rear of the auger motor mounting panelAuger Drive Components FMD-2 Hopper Hopper Assy Auger Drive Components FMD-2 Bushing Panel Auger Drive ShaftHopper Dust Seal Disconnect the wires from the auger motor 16 to be removed Remove dust seal 17 from auger motorRemove auger motor and discard Location Ballast FMD-1 & FMD-2Thermostat Terminals Control Board FMD-2 onlyService Dispense Switch Dispense Switchs FMD-1 & FMD-2 FAN FMD-1 & FMD-2 Dispense Switch Terminals P1449FMD-2 Whipper Motor Terminals P1221 Frother and Whipper Motor FMD-1 shown & FMD-2Hopper Drive Board Hopper Drive Board FMD-1 onlyHopper Drive Board Terminals Hopper Drive Board FMD-1 onlyDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Replacement Refer to FigLevel Control Board and Level Probe FMD-1 only Lamp Replacement Refer toAs assembly Lamp Starter and Socket Refer to LocationLevel Control Board and Level Probe FMD-1 only Reconnect the violet wire to terminalLocation RINSE/RUN Switch FMD-1RINSE/RUN Switch FMD-2 WHI/RED toBLK from Main Harness WHI/BRN to YEL to Control Board J2-3 Cold Water Solenoid Valve Solenoid Valve Cold Water OPTIONALFMD-2 onlyFMD-1 Solenoid Valve Dispense FMD-1 & FMD-2 Tank Heater Solenoid Valve Inlet FMD-1 & FMD-2Tank Heater Switch FMD-1 shown & FMD-2 Tank Heater FMD-1 shown & FMD-2Main Harness Thermostat WHI/GRN T7 WHI/BLK T12 Transformer FMD-2 onlyBLU WHI Schematic Wiring Diagram FMD-1Schematic Wiring Diagram FMD-2

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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