Instruction/ maintenance manual of the product CDBC TWIN Bunn
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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 : C.
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.
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.
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.
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.
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.
Page 7 CEZ ADJUSTMENTS & OPTIONAL SETTINGS.
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 "®".
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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.
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 .
Page 23 CAUTION :.
Page 24 C A U T IO N : C A U T IO N : C A U T IO N :.
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 .
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Page 27 CA UTIO N :.
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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 .
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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.
Page 32 UT ION : UT ION : CA U.
Page 33 CAUTION : CAUTION : CAUTION :.
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 1.
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) W.
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) W.
An important point after buying a device Bunn CDBC TWIN (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn CDBC TWIN yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn CDBC TWIN - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn CDBC TWIN you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn CDBC TWIN will certainly help you make a decision on the purchase.
If you already are a holder of Bunn CDBC TWIN, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn CDBC TWIN.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn CDBC TWIN. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn CDBC TWIN along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
