Bunn CDBC Operating & Service Manual
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Bunn CDBC Operating & Service Manual

Bunn cdbc: user guide
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See also: Operation & Service Manual
CDBC, CDBCF
CDBCP, CDBCFP
S/N CDBC020213 & up
SINGLE CD, SINGLE CDF
N
IO
U T
C A
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601
FAX: (217) 529-6644
www.bunnomatic.com
35582.0000C
02/04 ©2003 Bunn-O-Matic Corporation

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  • Page 1 CDBC, CDBCF CDBCP, CDBCFP S/N CDBC020213 & up SINGLE CD, SINGLE CDF OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www.bunnomatic.com 35582.0000C 02/04 ©2003 Bunn-O-Matic Corporation...

  • Page 2: Table Of Contents

    REPAIR, REPLACEMENT OR REFUND. In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

  • Page 3: User Notices

    ° HEATED WHEN EMPTY ° USED ON HIGH FLAME FUNNEL CONTENTS OR EXPOSED ELECTRIC ARE HOT ELEMENTS READ THE ENTIRE OPERATING MANUAL BEFORE USING THIS PRODUCT FAILURE TO COMPLY RISKS INJURY PN: 00658.0000F 6/98 © 1985 BUNN-O-MATIC CORPORATION Page 3 35582 041503...

  • Page 4: Electrical & Plumbing Requirements

    " water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.

  • Page 5: Operating Controls

    Pressing a batch size switch (1/2 gal. or 1 gal.) so the indicator is glowing will set the brewer to deliver the desired brew volume. ADDITIONAL WARMER SWITCHES (CDBC only) Pressing any additional warmer switch so that the indicator is glowing, supplies power to the associated warmer.

  • Page 6: Initial Set-Up & Coffee Brewing

    Allow the cycle to finish and measure the amount of water in the decanter/server. It should be 64 ounces ± 2 for CDBC models and 128 ounces ± 2 for SINGLE CD models. Refer to the adjustments section of this manual should the volume need to be increased or decreased.

  • Page 7: Pour-Over Feature

    When brewing is completed, simply discard the grounds and filter. 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. Check and clean the sprayhead. The sprayhead holes must always remain open.

  • Page 8: Cdbc, Single Cd Adjustments & Optional Settings

    Adjusting Brew Volumes CDBC models are factory set to deliver 64 ounces ± 2 for each brew cycle. SINGLE CD models are factory set to deliver 128 ounces ± 2 for each brew cycle when 1 gal. option is selected and 64 ounces ±...

  • Page 9: Cdbc, Single Cd Water Sensing Threshold Adjustment Procedure

    ADJUSTMENTS & OPTIONAL SETTINGS (cont.) 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.

  • Page 10: Cdbc, Single Cd Pulse Brew Setup Procedure

    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.

  • 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 by qualified service personnel.
  • Page 12 TROUBLESHOOTING (cont.) REFILL CIRCUIT PROBLEM Will not fill or refill PROBABLE CAUSE 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.
  • Page 13 TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBLEM Fill or refill does not shut "OFF" (ON/OFF Switch "ON") Fill or refill does not shut "OFF" (ON/OFF Switch "OFF") PROBABLE CAUSE 1. Lime build up on probe 2. Water Level Probe Sensing Sys- 3.
  • Page 14 TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM Water does not heat to proper temperature 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. PROBABLE CAUSE 1.
  • Page 15 TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM 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 PROBABLE CAUSE 4.
  • Page 16 TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM Spitting or excessive steaming (cont.) Brewer is making unusual noises PROBABLE CAUSE 2. Temperature Probe 3. Control Board 1. Plumbing lines 2. Water supply 3. Lime build up Page 16 REMEDY Remove the probe from the grom- met and submerge in a water bath of approximately 70°F(21°C).
  • Page 17 TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM Brew cycle will not start PROBABLE CAUSE 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.
  • Page 18 TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM Brew cycle will not start (cont.) Consistently low beverage level in the dispenser or beverage over- flows dispenser PROBABLE CAUSE 8. Control board or dispense valve 1. Brew volume 2. Lime build up 3. Dispense Valve Page 18 REMEDY If the switch panel is operating...
  • Page 19 BUNN paper filters must be used for proper extraction. A fine drip or grind must be used for proper extraction. The BUNN ® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gently.
  • Page 20 1. Warmer Page 20 REMEDY 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 grounds leveled by shaking gen- tly. Disconnect the brewer from the power source.
  • 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 Dry Plug - In Fault - Sheath of temperature probe dry for 10 minutes after power-up Low Tank Level Fault - Level probe dry for 7 minutes after fill valve is energized Low Water Temperature Fault -...

  • Page 22: Service

    Each warmer assembly is attached with three #4- 40 screws. Contents Control Board - CDBC & SINGLE CD ... 23 Switch Panel - CDBC & SINGLE CD ... 24 Dispense Valve ... 25 Limit Thermostat ... 26 Tank Heater ... 27 Refill Valve ...

  • Page 23: Control Board - Cdbc & Single Cd

    8. Connect the blue wire and black wire to the relay on the control board. 9. Refer to CDBC , SINGLE CD Adjustments and Optional Settings to program the new control board. Page 23...

  • Page 24: Switch Panel - Cdbc & Single Cd

    SERVICE (cont.) SWITCH PANEL FIG. 3 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.

  • Page 25: Dispense Valve

    SERVICE (cont.) DISPENSE VALVE FIG. 4 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"...

  • Page 26: Limit Thermostat

    SERVICE (cont.) LIMIT THERMOSTAT FIG. 6 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.

  • Page 27: Tank Heater

    SERVICE (cont.) TANK HEATER FIG. 8 TANK HEATER 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.
  • Page 28 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.

  • Page 29: Refill Valve

    SERVICE (cont.) REFILL VALVE FIG. 10 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.

  • Page 30: Warmer Elements

    SERVICE (cont.) WARMER ELEMENT(S) FIG. 12 WARMER ELEMENTS 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.

  • Page 31: Wiring Diagrams

    SCHEMATIC WIRING DIAGRAM CDBC - 15, 20 & 35 LIMIT THERMOSTAT BLU-14 BLK-14 COUNTER (OPTIONAL) J1-1 J1-2 BLU-14 BLK-14 N.O. J1-1 BRN/BLK WHI/BLU J1-5 WHI/RED WHI/VIO WHI/GRN J1-10 CONTROL PANEL ASSY LT FRNT SW BREW SW J2-1 ON/OFF SW TOP FRNT SW...
  • Page 32 WITH LEFT WARMERS WITH RIGHT WARMERS WITH LEFT & RIGHT WARMERS WITH LEFT & TOP WARMERS t° WITH RIGHT & TOP WARMERS 29077.0002B 04/03 ©2002 BUNN-O-MATIC CORPORATION Page 32 WHI-14 (MODELS 15 & 20) TANK HEATER RED-14 (MODEL 35) BREW STATION WARMER...

  • Page 33: Schematic Wiring Diagram

    NO CONNECTION THIS APPLICATION 1/2 GAL 120/208V AC 3 WIRE LEVEL 120/240V AC 3 WIRE PROBE 29077.0003C 04/03 ©2003 BUNN-O-MATIC CORPORATION Page 33 WHI-14 (MODELS 15 & 20) TANK HEATER RED-14 (MODEL 35) BREW STATION WARMER (CONTROLLED BY ON/OFF SW)
  • Page 34 RT REAR SW (NOTE – ALL WARMERS ARE NOT STATIC J2-11 AVAILABLE ON ALL MODELS!) SHIELD J3-1 J3-4 J5-1 t° 29077.0001C 02/04 ©1998 BUNN-O-MATIC CORPORATION BLK-14 "KEEP WARM" HEATER BREW STATION WARMER (CONTROLLED BY ON/OFF SW) WHI/RED DISPENSE WHI/GRN BRN/BLK BRN/BLK...
  • Page 35 RT REAR SW (NOTE – ALL WARMERS ARE NOT STATIC J2-11 AVAILABLE ON ALL MODELS!) SHIELD J3-1 J3-4 J5-1 t° 29077.0004B 02/04 ©2003 BUNN-O-MATIC CORPORATION BLK-14 "KEEP WARM" HEATER BREW STATION WARMER (CONTROLLED BY ON/OFF SW) WHI/RED DISPENSE WHI/GRN BRN/BLK BRN/BLK...

This manual is also suitable for:

CdbcfCdbcfpCdbcpSingle cdfSingle cd

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