Bunn CDBCF manual

CAUTION C D B C , C DB C F C D B C P , C DB CF P S/ N C D BC02 021 3 & u p S I NG L E CD , S IN GL E C D F OPER A T I NG & SE R VICE MANUA L BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 35582.0000C 02/04 ©2003 Bunn-O-Matic Corporation www .bunnomatic.com DISCONTI[...]

Page 2 INTRODUCTION This equipment will automatically brew a half-gallon batch of coffee into an awaiting decanter at the press of a button. A hot water faucet is included for allied beverage use. Most functions of the brewer are digitally controlled. It is only for indoor use on a sturdy counter or shelf. CONTENTS Introduction & Warranty .....[...]

Page 3 USER NOTICES Carefully read and follow all notices in this manual and on the equipment. All labels on the equipment should be kept in good condition. Replace any unreadable or damaged labels. ! W ARNING FUNNEL CONTENTS ARE HO T DISCARD DECANTER IF: ° CRACKED ° SCRA TCHED ° BOILED DR Y ° HEA TED WHEN EMPTY ° USED ON HIGH FLAME OR EXPOSED[...]

Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. Model 35 requires 3-wire, grounded service rated 120/208 or 120/240 volts ac, 20 amp, single phase, 6[...]

Page 5 OPERA TING CONTROLS ON/OFF SWITCH Pressing the "ON/OFF" switch (indicator glowing) supplies power to the brew station warmer, enables the brew circuit, and energizes the tank refill circuit. Pressing the switch again (indicator not glowing) stops tank refilling and brewing and deenergizes the brew station warmer. Stopping a brew cy[...]

Page 6 INITIAL SET -UP 1. Insert an empty funnel into the funnel rails. 2. Place an empty decanter under the funnel. 3. Connect the brewer to the power source. 4. Model CDBC – Press the "ON/OFF" switch (indicator glowing). Model SINGLE CD - Press the "1 gal" switch (indicator glowing) and the "ON/OFF" switch (indicat[...]

Page 7 POUR-OVER FEA TURE Models CDBCP & CDBCFP If the brewer is equipped with a pour-over feature, follow the instructions below. 1. Remove the thumbscrew and pour-in lid from the top cover of the brewer and set aside. 2. Insert a BUNN ® filter into the funnel. 3. Pour fresh coffee grounds into the filter and level the bed of grounds by gentl[...]

Page 8 CDBC, SINGLE CD ADJUSTMENTS & OPTIONAL SETTINGS HIDDEN SWITCH Setting Brew T emperature The brewer is factory set to brew at 200 ° F (93˚C). To change this setting, press and hold the "HIDDEN" switch beneath the "®". The word "TEMP" above the "ON/OFF" switch will glow to correspond with the temp[...]

Page 9 BREW VOLUME SET-UP: Use the following steps when the setting is unknown or a different circuit board is being installed. 1. Place an empty funnel in the funnel rails and an empty decanter/server or graduated vessel beneath the funnel. 2. Place the "ON/OFF" switch in the "ON", upper position. 3. Press and hold the brew sta[...]

Page 10 PULSE BREW SETUP PROCEDURE (CDBC & SINGLE CD) The pulse brew parameters (initial fill time, off times, and remaining on times) are entered using the following set- by-example process. 1. First set the brew volume using the standard procedure in Brew Volume Setup. 2. Position an empty container under the sprayhead. Allow the tank to fini[...]

Page 11 TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only b[...]

Page 12 Will not fill or refill PROBABLE CAUSE REMEDY PROBLEM 1. Power off to brewer 2. Water shut off 3. Display flashing 4. ON/OFF Switch 5. Lime build up on Probe 6. Refill Valve or Control Board 7. Water is too conductive for proper operation when using the factory setting of sensing thresh- old. Press warmer switches on control panel to determ[...]

Page 13 TROUBLESHOOTING (cont.) Fill or refill does not shut "OFF" (ON/OFF Switch "ON") Fill or refill does not shut "OFF" (ON/OFF Switch "OFF") PROBABLE CAUSE REMEDY PROBLEM 1. Lime build up on probe 2. Water Level Probe Sensing Sys- tem 3. Refill valve or control board 4. Water is too conductive for proper [...]

Page 14 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY HEATING CIRCUIT 1. Display flashing 2. Water not touching tempera- ture probe 3. Dry Plug In Probe Sensing Sys- tem Brewer has shut down due to mal- function (See Diagnostic Chart in manual, Page 21, or under top lid). Remove probe and grommet. Look into hole on tank lid. Water must be w[...]

Page 15 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper temperature (cont.) IMPORTANT: Make sure no tem- perature tests are taken before the ready light is "ON". Tank tempera- ture must be stabilized before read- ings are taken. Spitting or excessive steaming 4. Temperature Probe 5. Limit Thermostat 6. [...]

Page 16 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming (cont.) Brewer is making unusual noises 2. Temperature Probe 3. Control Board 1. Plumbing lines 2. Water supply 3. Lime build up Remove the probe from the grom- met and submerge in a water bath of approximately 70 ° F(21 ° C). Con- nect an ohmmeter to pin[...]

Page 17 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT Brew cycle will not start 1. Display flashing 2. No water 3. No power or incorrect voltage to the brewer 4. ON/OFF switch not in the "ON" position 5. Low water temperature (Brew lockout is enabled) 6. Water not touching refill probe inside tank 7. Switch panel B[...]

Page 18 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) If the switch panel is operating properly, proceed as follows. At- tach a voltmeter to the terminals of the dispense solenoid. Connect the brewer to the power source. Turn on the brewer and press the BREW switch. Voltage should be present at the solenoid terminals[...]

Page 19 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) Dripping from spray head Weak beverage 1. Lime build up 2. Dispense valve 1. Sprayhead 2. Water temperature 3. Filter type 4. Coffee grind 5. Funnel loading Inspect the tank assembly for ex- cessive lime deposits. Delime as required. Remove the dispense valve and [...]

Page 20 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) Dry coffee grounds remain in the funnel Low beverage serving tempera- ture 1. Sprayhead 2. Funnel loading 1. Warmer Make sure sprayhead is present and holes are clear and unob- structed. The BUNN ® paper filter must be centered in the funnel and the bed of ground[...]

Page 21 The bank of temperature indicators indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to investigating the fault. FLASHES CAUSE THINGS TO CHECK 1 Dry Plug - In Fault - Water Pressure (Is water shut "OFF") Sheath of temperature probe dry for 10 minutes after power-up Temperature [...]

Page 22 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service pe[...]

Page 23 SERVICE (cont.) CONTROL BOARD Location: The Control Board is located inside the top cover behind the front end cap. Test Procedures: The test procedures for the control board will vary depending upon the problems experienced by the brewer. Refer to the Troubleshooting guide beginning on page 9. The troubleshooting guide is divided into thre[...]

Page 24 SERVICE (cont.) SWITCH PANEL Location: The Switch Panel is located in the front of the hood. Test Procedures: The test procedures for the switch panel and the control board will vary depending upon the problems experienced by the brewer. Refer to the Troubleshoot- ing guide beginning on page 11. The troubleshooting guide is divided into thr[...]

Page 25 SERVICE (cont.) DISPENSE VALVE Location: The dispense valve is located inside the top cover behind the front end cap. Test Procedures: 1. Disconnect the brewer from the power source. 2. Check the water level in the tank to confirm that it is within 1/2" from the top of the tank. 3. Connect the brewer to the power source. If the brewer [...]

Page 26 LIMIT THERMOSTAT Location: The limit thermostat is located inside the front access panel on the front side of the tank. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the blue and black wires from the limit thermostat. 3. With an ohmmeter, check for continuity across the limit thermostat terminals. If continu[...]

Page 27 Location: The tank heater is located inside the tank and secured to the tank bottom. Test Procedures: 1. Disconnect the brewer from the power supply. 2. With a voltmeter, check the voltage across the white or red wire from the terminal block and the black wire from the control board. Connect the brewer to the power source. The indication mu[...]

Page 28 P1856 SERVICE (cont.) TANK HEATER (Cont.) 18. Install tank lid and secure in place with eight #8-32 nuts. 19. Connect the two white wires of the tank warmer blanket. 20. Connect the limit thermostat to the front of the tank assembly. 21. Connect the green wire to the tank mounting bracket using #8-32 nut. 22. Connect the pink wire to the le[...]

Page 29 SERVICE (cont.) REFILL VALVE Location: The refill valve is located inside the trunk on the lower center part of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white and white/blue wires from the refill valve. Set the "ON/OFF" switch in the "ON" upper position. 3.[...]

Page 30 SERVICE (cont.) WARMER ELEMENT(S) Location: The warmer element(s) is located under the warmer plate. Test Procedures: 1. Disconnect the brewer from the power source. 2. Use the white wire from the terminal block and the other bottom wire on the "ON/OFF" switch. 3. With a voltmeter, check voltage across the two wires with the "[...]

Page 31 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. SOL SCHEMATIC WIRING DIAGRAM CDBC - 15, 20 & 35 29077.0000C 04/03 ©1998 BUNN-O-MATIC CORPORATION P2 P1 P1 FRONT WARMER P3 BRN/BLK VIO WHI REAR WARMER TANK HEATER L1 GRN RED-14 (MODEL 35) WHI-14 (MODELS 15 & 20) N L2 BLU-14 BLU-14 "KEEP WARM" HEATER WHI BREW STA[...]

Page 32 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. SOL SCHEMATIC WIRING DIAGRAM CDBCP/CDBCPF - 15, 20 & 35 W/Flashing Lamp (Freshness) 29077.0002B 04/03 ©2002 BUNN-O-MATIC CORPORATION P2 P1 P1 FRONT WARMER P3 BRN/BLK VIO WHI REAR WARMER TANK HEATER L1 GRN RED-14 (MODEL 35) WHI-14 (MODELS 15 & 20) N L2 BLU-14 BLU-14 "[...]

Page 33 SOL SCHEMATIC WIRING DIAGRAM SINGLE CD - 15, 20 & 35 29077.0003C 04/03 ©2003 BUNN-O-MATIC CORPORATION P2 P1 P1 TANK HEATER L1 GRN RED-14 (MODEL 35) WHI-14 (MODELS 15 & 20) N L2 BLU-14 BLU-14 "KEEP WARM" HEATER WHI BREW STATION WARMER (CONTROLLED BY ON/OFF SW) LIMIT THERMOSTAT BRN/BLK VIO WHI/RED WHI/RED WHI WHI WHI WHI WH[...]

Page 34 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. SOL SCHEMATIC WIRING DIAGRAM CDBCP DB/CDBCFP DB 29077.0001C 02/04 ©1998 BUNN-O-MATIC CORPORATION P2 P1 P1 FRONT WARMER P3 BRN/BLK VIO WHI REAR WARMER TANK HEATER L1 GRN RED-14 L2 BLU-14 BLU-14 "KEEP WARM" HEATER WHI BREW STATION WARMER (CONTROLLED BY ON/OFF SW) LIMIT T[...]

Page 35 35582 021604 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. SOL SCHEMATIC WIRING DIAGRAM CDBCP DB/CDBCFP DB 29077.0004B 02/04 ©2003 BUNN-O-MATIC CORPORATION P2 P1 P1 FRONT WARMER P3 BRN/BLK VIO WHI REAR WARMER TANK HEATER L1 GRN WHI-14 L2 BLU-14 BLU-14 "KEEP WARM" HEATER WHI BREW STATION WARMER (CONTROLLED BY ON/OF[...]