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Bunn TWIN APS manual

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Table of contents for the manual

  • Page 1

    CDBC TWIN, TWIN APS CA U T IO N :[...]

  • Page 2

    Page 2 INTRODUCTION This equipment will brew one or two half-gallon batches of coffee simultaneously into awaiting dispensers with just the press of a button. One side may include a hot water faucet 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 Introd[...]

  • Page 3

    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. # 00986.0000 # 03408.0002 # 03409.0002 # 00656.0000 # 00658.0000 # 29007.0000 # 12364.0000 # 10044.0000 ! W ARNING DO NOT O VERLO AD CIRCUIT . AL W A Y[...]

  • Page 4

    Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Electrical Hook-Up CAUTION – Improper electrical installation will damage electronic components. 1. An electrician must provide electrical service as specified. 2. Using a voltmeter, check the voltage and color coding [...]

  • Page 5

    Page 5 OPERA TING CONTROLS Model CDBC TWIN 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, brewing and deenergizes the brew station warmer. Stopp[...]

  • Page 6

    Page 6 INITIAL SET -UP 1. Insert an empty funnel into the funnel rails of one of the brew stations. 2. Place an empty decanter/server under the funnel. 3. Connect the brewer to the power source. 4. Press the "ON/OFF" switch (indicator glowing). 5. Water will flow into the tank and stop when the tank is filled to its capacity. 6. Wait appr[...]

  • Page 7

    Page 7 ADJUSTMENTS & OPTIONAL SETTINGS HIDDEN SWITCH[...]

  • Page 8

    Page 8 ADJUSTING BREW VOLUMES The brewer is factory set to deliver 64 ounces ± 2 for each brew cycle. 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. Press the[...]

  • Page 9

    Page 9 PULSE BREW SETUP PROCEDURE 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 finish refilling. Make sure [...]

  • Page 10

    Page 10 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 11

    Page 11 Will not fill or refill Fill or refill does not shut "OFF" (ON/OFF Switch "ON") 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 sett[...]

  • Page 12

    Page 12 Fill or refill does not shut "OFF" (ON/OFF Switch "OFF") 2. Water Level Probe Sensing Sys- tem 3. Refill valve or control board 4. Water is too conductive for proper operation when using the factory setting of sensing threshold. 1. Refill valve or control board Disconnect the brewer from the power source. Disconnect the [...]

  • Page 13

    Page 13 TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY HEATING CIRCUIT PROBLEM 1. Display flashing 2. Water not touching tempera- ture probe 3. Dry Plug In Probe Sensing Sys- tem Brewer has shut down due to malfunction (See Diagnostic Chart in manual, Page 20, or under top lid). Remove probe and grommet. Look into hole on tank lid. Water must be wit[...]

  • Page 14

    Page 14 TROUBLESHOOTING (cont.) 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. Tank Heater 1. Lime build up o[...]

  • Page 15

    Page 15 TROUBLESHOOTING (cont.) 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 pins 3 and 4 of the J3 connector.[...]

  • Page 16

    Page 16 TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY BREWING CIRCUIT PROBLEM 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 17

    Page 17 Brew cycle will not start (cont.) Consistently low beverage level in the dispenser or beverage over- flows dispenser TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY 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 [...]

  • Page 18

    Page 18 TROUBLESHOOTING (cont.) Dripping from sprayhead 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 clear any obstructions. Rebuild or replace the valve if[...]

  • Page 19

    Page 19 TROUBLESHOOTING (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. There should be sepa- rate streams of water coming out of each hole in the sprayhead. The BUNN ® paper filter must be centered in [...]

  • Page 20

    Page 20 DIAGNOSTICS Intermittent flashing of 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 a[...]

  • Page 21

    Page 21[...]

  • Page 22

    Page 22 CAUTION :[...]

  • Page 23

    Page 23 CAUTION : CAUTION : CAUTION : CAUTION DISCARD DECANTER IF: . CRA CKED . SCRATCHED . BOILED DRY . HE ATED WHEN EMP TY . USED ON HIGH FLAM E . OR EXPOSED ELECTRIC E LE MENTS FAILURE TO COMPLY RISKS INJURY P N : 6 58 19 8 5 B U NN -O - MA TIC CO RP OR A T ION FUNNEL CONTENTS ARE HOT ![...]

  • Page 24

    Page 24 CAUTION : CAUTION DISCARD DECANTER IF: . CRAC KED . S CRATCHED . BOILED DRY . HEATED WHEN E MPTY . USED ON HIG H FLAME . OR EXPOS ED ELE CTRIC ELEMENTS FAILURE TO COMPLY RISKS INJURY PN: 658 1985 BU N N-O-M ATIC CO RPORATION FUNNEL CONTENTS ARE HO T ! SERVICE (cont.) DISPENSE VALVE Location: The dispense valves are located inside the top co[...]

  • Page 25

    Page 25[...]

  • Page 26

    Page 26 Location: The tank heaters are located inside the tanks and secured to the tank bottoms. Test Procedures: 1. Disconnect the brewer from the power supply. 2. With a voltmeter, check the voltage across the red wire from the terminal block and the black wire from the control board. Connect the brewer to the power source. The indication must be[...]

  • Page 27

    Page 27 P1856 SERVICE (cont.) TANK HEATERS (Cont.) 17. Install tank assembly onto mounting brackets and secure in place with four #8-32 nuts. 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 [...]

  • Page 28

    Page 28 CAUTION : CAUTION : C[...]

  • Page 29

    Page 29 C A U T IO N : C A U T IO N : C A U T IO N :[...]

  • Page 30

    Page 30 36672 030104 SCHEMATIC WIRING DIAGRAM CDBC TWIN 0/6 (LEFT) 29323.0000C 02/04 ©1999 BUNN-O-MATIC CORPORATION TANK HEATER GRN GRN RED-14 (MODEL 35) BLK BLK-14 SCHEMATIC WIRING DIAGRAM CDBC TWIN 0/6 (RIGHT) WHI WHI-14 WHI-14 BLK-14 BLK-14 RED-14 (MODEL 35) BREWERS WITH 1 POWER CORD ONLY L1 N L2 L1 N L2 L1 N L2 P1, P2, & P3 ARE PINS OF A P[...]

  • Page 31

    Page 31 36672 030104 SCHEMATIC WIRING DIAGRAM CDBC TWIN 2/2 (LEFT) 29323.0002B 02/04 ©2000 BUNN-O-MATIC CORPORATION TANK HEATER GRN GRN RED-14 (MODEL 35) BLK BLK-14 SCHEMATIC WIRING DIAGRAM CDBC TWIN 2/2 (RIGHT) WHI WHI-14 WHI-14 BLK-14 BLK-14 RED-14 (MODEL 35) BREWERS WITH 1 POWER CORD ONLY L1 N L2 L1 N L2 L1 N L2 P1, P2, & P3 ARE PINS OF A P[...]

  • Page 32

    Page 32 SCHEMATIC WIRING DIAGRAM CDBC TWIN APS (LEFT) 32161.0000B 8/99 ©1999 BUNN-O-MATIC CORPORATION TANK HEATER GRN GRN RED-14 (MODEL 35) BLK BLK-14 SCHEMATIC WIRING DIAGRAM CDBC TWIN APS (RIGHT) WHI WHI-14 WHI-14 BLK-14 BLK-14 RED-14 (MODEL 35) BREWERS WITH 1 POWER CORD ONLY L1 N L2 L1 N L2 L1 N L2 SOL BLU-14 BLU-14 "KEEP WARM" HEATER[...]