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Bunn CDBC TWIN - page 1
BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www .bunnomatic.com OPERA TING & SERVICE MANUAL CEZ CDBC TWIN CAUTION : CAUTION : CAUTION : ...
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Bunn CDBC TWIN - 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 ...
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Bunn CDBC TWIN - 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 # 00656.0000 # 00658.0000 # 12364.0000 # 10044.0000 ! W ARNING DO NOT O VERLO AD CIRCUIT . AL W A YS ELECTRICALL Y GROUND THE CHASSIS OR A ...
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Bunn CDBC TWIN - 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 ...
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Bunn CDBC TWIN - page 5
Page 5 ON/OFF SWITCH Placing the "ON/OFF" switch in the "ON" upper position supplies power to the brew station warmer, enables the brew circuit, and energizes the tank refill circuit. Placing the switch in the "OFF" lower position stops tank refilling, brewing and deenergizes the brew station warmer. Stopping a brew cy ...
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Bunn CDBC TWIN - page 6
Page 6 BREW SWITCH Momentarily pressing and releasing the switch starts a brew cycle when the "ON/OFF" indicator is glowing. NOTE – The "ON/OFF" indicator must be glowing to initiate and complete a brew cycle. ADDITIONAL WARMER SWITCHES Pressing any additional warmer switch so the indicator is glowing, supplies power to the as ...
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Bunn CDBC TWIN - page 7
Page 7 CEZ ADJUSTMENTS & OPTIONAL SETTINGS ...
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Bunn CDBC TWIN - page 8
Page 8 CDBC ADJUSTMENTS & OPTIONAL SETTINGS HIDDEN SWITCH HIDDEN SWITCH NOTE: The following adjustments must be performed for each Brew Station. Setting Brew Temperature The brewer is factory set to brew at 200 ° F(95 ° C). To change this setting, press and hold the "HIDDEN" switch beneath the "®". The word "TEMP&quo ...
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Bunn CDBC TWIN - page 9
Page 9 Adjusting Brew V olumes 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 or graduated vessel beneath the funnel. 2. Press the " ...
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Bunn CDBC TWIN - page 10
Page 10 PULSE BREW SETUP PROCEDURE (CDBC TWIN & CDBCF TWIN) 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 t ...
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Bunn CDBC TWIN - page 11
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 ...
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Bunn CDBC TWIN - page 12
Page 12 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 (CDBC & CEZ) 2. Water shut off (CDBC & CEZ) 3. Display flashing (CDBC) or ready light flashing (CEZ) 4. ON/OFF Switch (CDBC & CEZ) 5. Lime build up on Probe (CDBC & CEZ) 6. ...
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Bunn CDBC TWIN - page 13
Page 13 Fill or refill does not shut "OFF" (ON/OFF Switch "OFF") 2a. Water Level Probe Sensing Sys- tem (CDBC) 2b. Water Level Probe Sensing Sys- tem (CEZ) 3. Refill valve or control board (CDBC & CEZ) 4. Water is too conductive for proper operation when using the factory setting of sensing threshold. 1. Refill valve or cont ...
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Bunn CDBC TWIN - page 14
Page 14 TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY HEATING CIRCUIT PROBLEM 1. Display flashing (CDBC) or ready light flashing (CEZ) 2. Water not touching tempera- ture probe 3a. Dry Plug In Probe Sensing System (CDBC) 3b. Dry Plug In Probe Sensing System (CEZ) Brewer has shut down due to malfunction (See Diagnostic Chart in manual, Page 20, or u ...
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Bunn CDBC TWIN - page 15
Page 15 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 4a. Temperature Probe (CDBC) 4b. Temperature Probe (CEZ) 5. Limit Thermost ...
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Bunn CDBC TWIN - page 16
Page 16 TROUBLESHOOTING (cont.) Spitting or excessive steaming (cont.) Brewer is making unusual noises 2a. Temperature Probe (CDBC) 2b. Temperature Probe (CEZ) 3. Control Board (CDBC & CEZ) 1. Plumbing lines 2. Water supply 3. Lime build up A) Remove the probe from the grommet and submerge in a water bath of approximately 70 ° F(21 ° C). Conn ...
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Bunn CDBC TWIN - page 17
Page 17 TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY BREWING CIRCUIT PROBLEM Brew cycle will not start 1. Display flashing (CDBC) or ready light flashing (CEZ) 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 refil ...
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Bunn CDBC TWIN - page 18
Page 18 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 start switch (CEZ) or switch panel (CDBC) is operating prop- erly, proceed as follows. Attach a voltmeter to the terminals of the dispense solenoid. Connect the brewer to t ...
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Bunn CDBC TWIN - page 19
Page 19 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 ...
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Bunn CDBC TWIN - page 20
Page 20 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 six sepa- rate streams of water coming out of the sprayhead. The BUNN ® paper filter must be centered in the funne ...
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Bunn CDBC TWIN - page 21
Page 21 DIAGNOSTICS Intermittent flashing of the READY indicator (Model CEZ) or the bank of temperature indicators (Model CDBC) 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?) ...
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Bunn CDBC TWIN - page 22
Page 22 CAUTION : CAUTION : CAUTION : CAUTION : C A U T IO N D I S C A R D D E C A N T E R I F : . CR ACKED . S CRATC HED . BOILED DRY . HEATED W HEN E MPTY . USE D O N HIGH FLAM E . O R E XPO SED E LEC TR IC E LE MENTS F A I L U R E T O C O M P L Y R I S K S I N J U R Y PN: 6 5 8 1985 B UNN-O-MATIC CORP ORA TIO N F U N N E L C O N T E N T S A R E ...
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Bunn CDBC TWIN - page 23
Page 23 CAUTION : ...
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Bunn CDBC TWIN - page 24
Page 24 C A U T IO N : C A U T IO N : C A U T IO N : ...
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Bunn CDBC TWIN - page 25
Page 25 CAUTION : CAUTION : CAUTION : C A U TIO N DISCARD DECANTER IF: . C R A C K E D . S C R A T C H E D . B O IL E D D R Y . H E A T E D W H E N E M P T Y . U S E D O N H I G H F L A M E . O R E X P O S E D E L E C T R IC E L E M E N T S FAILURE TO COMPLY RISKS INJURY PN : 6 58 19 85 B UN N -O- MAT IC C OR P O R A T IO N FUNNEL CONTENTS ARE HOT ...
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Bunn CDBC TWIN - page 26
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Bunn CDBC TWIN - page 27
Page 27 CA UTIO N : ...
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Bunn CDBC TWIN - page 28
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Bunn CDBC TWIN - page 29
Page 29 TR M 2 J1 J2 J3 J4 J5 J6 J7 T R M 1 T R M 2 J1 J2 J3 J4 J5 J6 J7 TR M 1 CAUTION DISC AR D D E C AN TER IF: . C R A C K E D . S C R A T C H E D . B O I LE D D R Y . H E A T E D W H E N E M P TY . U S E D O N H IG H FL A M E . O R E X P O S E D E LE C TR IC E LE M E N T S FA ILUR E TO C OM PLY R ISK S IN JUR Y P N : 65 8 1 9 85 B U NN -O -M A ...
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Bunn CDBC TWIN - page 30
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Bunn CDBC TWIN - page 31
Page 31 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 ...
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Bunn CDBC TWIN - page 32
Page 32 UT ION : UT ION : CA U ...
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Bunn CDBC TWIN - page 33
Page 33 CAUTION : CAUTION : CAUTION : ...
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Bunn CDBC TWIN - page 34
Page 34 29323.0001D 6/99 ©1999 BUNN-O-MATIC CORPORATION GRN GRN BLK BLK-14 WHI WHI-14 WHI-14 BLK-14 BLK-14 RED-14 (MODEL 35) RED-14 (MODEL 35) BREWERS WITH 1 POWER CORD ONLY L1 N L2 L1 N L2 L1 N L2 120/208V AC 3 WIRE 120/240V AC 3 WIRE SINGLE PHASE SCHEMATIC WIRING DIAGRAM CEZ TWIN 0/6 (LEFT) SCHEMATIC WIRING DIAGRAM CEZ TWIN 0/6 (RIGHT) P1, P2, & ...
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Bunn CDBC TWIN - page 35
Page 35 SCHEMATIC WIRING DIAGRAM CDBC TWIN 0/6 (LEFT) 29323.0000B 1/99 ©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 POLARIZED THREE ...
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Bunn CDBC TWIN - page 36
Page 36 SCHEMATIC WIRING DIAGRAM CDBC TWIN 2/2 (LEFT) 29323.0002A 8/00 ©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 POLARIZED THREE ...
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