FMD-3 (S/N FMD0013000-UP) OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 29170.
INTRODUCTION This equipment dispenses hot beverages or soup on demand from powdered product. It has three hoppers. This equipment may also dispense cold beverages from powdered product from the left dispense station. It is for indoor use only on a sturdy counter or shelf. WARRANTY Bunn-O-Matic Corp.
USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protection. All notices are to be kept in good condition. Replace any unreadable or damaged labels. 28301.0003 28328.0000 This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A.
INITIAL SET-UP 1. 2. 3. 4. Locate the drip tray assembly above the dispenser nested in the packing material. Remove the drip tray and the drip tray cover and set them aside. Remove the water strainer assembly from the drip tray and set it aside. Remove the four legs from the packaging material, apply non-skid pads to the bottom of the legs and securely install the legs in the dispenser base.
INITIAL FILL & HEAT CAUTION - The dispenser must be disconnected from the power source throughout the initial fill & heat, except when specified in the instructions. 1. Turn on the water supply and connect the dispenser to the power source. 2. Water will automatically flow into the tank to the proper level and then shut off. This will take less than five minutes. 3. When the tank is full of water, open the front door and place the heater switch in the “ON” (lower) position.
COLD BEVERAGE SET-UP (OPTIONAL) Cold beverages may be dispensed from the left dispense position. Simply place the HOT/COLD switch near the left whipper chamber in the “COLD” (upper) position. CLEANING Refer to the decal inside the hopper access door for cleaning recommendations and procedures. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment.
HOPPER THROW TEST(cont.) 4. Press and hold the dispense switch of the appropriate chamber for 5 seconds. The hopper motor will run for 10 seconds at the programmed speed. 5. Remove the cup and weigh the dispensed product. To calculate the throw rate (g/s or oz./s), divide the total weight of the dispensed product by 10. 6. Replace the mixing chamber and steam collector, and return the rinse/run switch to the run position.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Product will not dispense 1. No water Water lines and valves to the dispenser must be open. 2. No power or incorrect voltage to (A1) Check for 120 volts across the black and white wires on two the dispenser wire 120 volt dispenser. (A2) Check for 120 volts across the red and white wires and the black and white wires and 240 volts across the red and black wires on three wire 120/240 volt dispenser.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Product will not dispense (cont.) 9. Water Strainer (A) Direction of flow arrow must be pointing towards dispenser. (B) Remove the strainer and check for obstructions. Clear or replace. 10. Lime build-up Inspect the tank assembly for excesCAUTION - Tank and tank compo- sive lime deposits. Delime as renents should be delimed regularly quired. depending on local water conditions.
TROUBLESHOOTING (cont.) PROBLEM Dripping from dispense tip Water flows into tank continuously Product overflows container PROBABLE CAUSE REMEDY 1. Lime build-up Inspect the tank assembly for excesCAUTION - Tank and tank compo- sive lime deposits. Delime as renents should be delimed regularly quired. depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks. 2.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Weak product 1. Water temperature Place an empty container beneath the dispense tip. Initiate a dispense cycle and check the water temperature immediately below the dispense tip with a thermometer. (A) Reading for mechanical thermostat models should be 180°F(82°C) to 200°F (93°C) (see thermostat temperature settings decal in USER NOTICES on page 3. (B) Reading for electronic thermostat should be185°F(85°C) to190°F (88°C).
TROUBLESHOOTING (CONT.) PROBLEM PROBABLE CAUSE REMEDY Dispenser is making unusual noises 1. Plumbing Lines Plumbing lines should not be resting on the counter top. 2. Water Supply (A) The dispenser must be connected to a cold water line (B) Water pressure to the dispenser must not exceed 90 psi (620 kPa) Install a regulator if necessary to lower the working pressure to approximately 50 psi (345 kPa). Excess dust Display not lit 3. Tank Heater Remove and clean lime off the tank heater.
AUGER DRIVE COMPONENTS SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.
SERVICE AUGER DRIVE COMPONENTS (CONT.) 1 2 14. Install hopper assy (20) in the dispenser by sliding hopper assy in the guides on the hopper support plate (19) until the slot in the bottom rear the hopper seats against the shoulder screw (18) in the hopper support plate. 4 3 5 Removal, Cleaning and Replacement: Hopper & Auger (Late Models): 1. Open the dispenser door and raise the top front cover. 2.
SERVICE (cont.) AUGER DRIVE COMPONENTS (cont.) Auger Drive Motor (Refer to Fig. 2 & 3): 6. Remove dust seal (17,14) from auger motor (16,13). 7. Remove the four #8-32 screws securing the auger motor to the auger motor mounting bracket. 8. Remove auger motor and discard. 9. Using four #8-32 screw install new auger motor (16,13) on mounting bracket (15,12). 10. Install dust seal (17,14) on auger motor shaft. 11.
SERVICE (cont.) BALLAST Removal and Replacement: 1. Disconnect the wires from the ballast. 2. Remove the two #8-32 screws securing the ballast to the component bracket. 3. Remove and discard ballast. 4. Install new ballast using two #8-32 screws to secure ballast to the component bracket.. 5. Refer to Fig. 6 when reconnecting the wires. BLK to Main Wiring Harness BLK to BLU from Door Interconnect Harness J1 J2 J4 J3 FIG. 5 BALLAST P1637.40 FIG.
6. Disconnect the four pin connector from J4 of the control board. 7. With a voltmeter, check the voltage across pins 1 & 4 of the four pin connector on the wiring harness. Connect the dispenser 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. 8. Disconnect the dispenser from the power source. SERVICE (cont.
SERVICE (cont.) CONTROL BOARD (cont.) 5. Reconnect the six pin connector of the wiring harness to J3 of the control board. 6. Check that the rinse/run switch is in the run position. 7. With a voltmeter, check the voltage across the red (+) terminal and the black (-) terminal of the auger motor. Connect the dispenser to the power source. Press and hold the appropriate dispense switch. After a delay of about .6 seconds, the indication must be between +4.0 and +24.5 volts dc. 17.
SERVICE (cont.) CONTROL THERMOSTAT FIG. 9 CONTROL THERMOSTAT 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.
SERVICE (cont.) CONTROL THERMOSTAT (cont.) TAN to WHI/BRN in Main Wiring Harness BLK to Main Wiring Harness F OF HI BUNN + R ATE HE 0° 19 RE T ATU EN ER TM MP S TE ADJU BLY 02 SEM RP 7.00T AS C CO 52 26 STA ATI MO -O-M ER NN TH BU ® 0° 16 - AC 0V 12 BLK from Limit Thermostat BLK from Tank Heater Switch WHI to Main Wiring Harness BLK to Main Wiring Harness ELECTRONIC THERMOSTAT MECHANICAL THERMOSTAT FIG.
SERVICE (cont.) If voltage is present as described, proceed to #7. If voltage is not present as described, refer to the Wiring Diagrams and check the dispenser wiring harness. 7. Check for continuity across the terminals (top right to top left; bottom right to bottom left) of the dispense switch with the switch in the “ON” position. Continuity must not be present when the switch is in the “OFF” (released) position. DISPENSE SWITCH FIG.
SERVICE (cont.) FAN J1 J2 J4 J3 FIG. 13 FAN P1436 Location: The fan is located inside the dispenser housing on the right rear of the dispenser base plate. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the black and white wires from the fan terminals. 3. With a voltmeter, check the voltage across the black and white wires. Connect the dispenser to the power source.
SERVICE (cont.) FROTHER AND WHIPPER MOTOR (cont.) ber receptacle (8) by twisting counterclockwise until the tabs on the whipper chamber (4) lock with the tabs on the whipper chamber receptacle (8). Be sure dispense port is pointing down. 24. Install dispense tip (3) into the bottom of the whipper chamber (4). 25. Using two #4-40 screws secure the fan baffle to the whipper motor mounting panel. 26. Install vacuum hose (12) on fan baffle (13). 27. Install hopper support panel using four #8-32 screws. 28.
If voltage is present as described, reconnect the four pin plugs and proceed to #5. If voltage is not present as described, refer to the Wiring Diagrams and check the main wiring harness. SERVICE (cont.) HOT/COLD SWITCH (Optional) 5. Disconnect the wires from the switch terminals. 6. With the switch in the “Cold” (upper) position check for continuity between the center terminal and the bottom terminal.
SERVICE (cont.) Removal and Replacement: 1. Open the dispenser door. 2. Remove the facenut securing the increase/decrease switch the whipper motor mounting panel. 3. Remove switch with wires attached from the back side of the whipper motor mounting panel. 4. Disconnect the wires from the switch and discard the switch. 5. Refer to Fig. 21 when connecting the wires to the new switch. 6. Install new switch with wires attached through the hole in the whipper mounting panel and secure with facenut.
SERVICE (cont.) LAMP HOLDER Removal and Replacement: 1. Open dispenser door (1). 2. Remove the five #6-32 screws securing lower door panel (5) to the door (1) and remove cover. 3. Disconnect the door wiring harness from the door interconnect wiring harness. 4. Remove five #6-32 screws securing the upper door panel (4) to the door (1). 5. Remove the upper door cover (4), lamp (3), lamp holders (2) and door wiring harness as an assembly. 6.
SERVICE (cont.) LAMP STARTER and SOCKET Location: The lamp starter (6) is located inside the door assy (1) on the top of the door lower panel (5). Removal and Replacement (Refer to Fig.22): 1. Open dispenser door assy (1) 2. Remove the five #6-32 screws securing the door lower panel (5) to the door assy (1). 3. Disconnect the leads on the starter socket from the door wiring harness. 4. Remove lower door panel (5) and starter w/socket (6) as assembly. 5.
BLK to Control Thermostat BLK to Tank Heater P1800 FIG.
SERVICE (cont.) Removal and Replacement: 1. Open the dispenser door. 2. Remove the facenut securing the run/rinse switch to the whipper motor mounting panel. 3. Remove switch with wires attached from the back side of the whipper motor mounting panel. 4. Disconnect the wires from the switch and discard the switch. 5. Refer to Fig. 28 when connecting the wires to the new switch. 6. Install new switch with wires attached through the hole in the whipper motor mounting panel and secure with facenut.
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 continuity is not present as described, replace the solenoid valve. SERVICE (cont.) SOLENOID VALVES (DISPENSE) 6. Check the solenoid valve for coil action. Connect the dispenser to the power source. With "RUN/ RINSE" switch in the "RINSE" (upper) position press the appropriate 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.
J1 J2 J4 J3 35
SERVICE (cont.) TANK HEATER FIG. 35 TANK HEATER P1637.40 Location: The tank heater is located inside the tank and secured to the tank lid. Test Procedure: 1. Disconnect the dispenser from the power source. 2. With a voltmeter, check the voltage across the black and white wires 120 volt or 240 volt models or black and red wires for 120/208 volt models or 120/240 volt models. Connect the dispenser to the power source.
SERVICE (cont.) TANK HEATER (cont.) WHI or RED to Main Wiring Harness BLK to Limit Thermostat FIG.
SERVICE (cont.) TANK HEATER SWITCH FIG. 37 TANK HEATER SWITCH P1642.40 BLK from Main Harness (Mechanical Thermostat) WHI/BRN from Main Harness (Electronic Thermostat) Location: The tank heater switch is located inside the dispenser on the upper right of the whipper motor mounting panel. BLK from Main Harness (Mechanical Thermostat) WHI/BRN from Main Harness (Electronic Thermostat) Test Procedure: P1208 FIG.
SERVICE (cont.) TRANSFORMER If voltage is not present as described, refer to the Wiring Diagrams and check the main wiring harness. 5. Check the voltage between J3-5 and J3-6 on the six 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.
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SCHEMATIC WIRING DIAGRAM FMDA-3 GRN L1 TANK HEATER SWITCH CONTROL THERMOSTAT LIMIT THERMOSTAT BLK-16 BLK-16 L2 BLK-16 BLK-16 TANK HEATER BLK-16 WHI-16 BLK J4-4 P. J3-5 RED WHI BLK BLU RED VIO WHI/BLK WHI/GRN WHI BLK BLK GRN BRN/BLK GRY YEL WHI/ORN WHI/YEL RED/BLK WHI/RED WHI/BLU GRN PNK J2-5 J2-10 WHI WHI/BLK WHI/GRN WHI WHI/BLU WHI/ORN WHI/RED GRN WHI/GRN WHI/BLK J2-1 SOL 240V : 24V AC TRANSFORMER 1 BLK C.
