Instruction/ maintenance manual of the product CDBC 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 OPER A T IN G & SE R VICE MANUA L CEZ, C E Z F , CDBC , C D B C F A i rp ot , Therm a l C a r afe & Ther m al Se r ver Brew e r s 29253.
Page 2 INTRODUCTION This equipment will automatically brew a half-gallon batch of coffee into an awaiting server at the press of a button. A hot water faucet may be included 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.
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.
Page 5 OPERA TING CONTROLS Model CEZ-APS/TS/TSR ON/OFF SWITCH Placing the "ON/OFF" switch in the "ON" upper position enables the brew circuit, and energizes the tank refill circuit. Placing the switch in the "OFF" lower position stops tank refilling and brewing.
Page 6 INITIAL SET -UP 1. Insert an empty funnel into the funnel rails. 2. Place an empty server under the funnel. 3. Connect the brewer to the power source. 4. Model CDBC-APS/TC/TS/TSR – Press the "ON/OFF" switch (indicator glowing). Model CEZ-APS/TS/TSR – Place the "ON/OFF" switch in the "ON" upper position.
Page 7 CEZ-APS/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS IMPORT ANT : The tank must be full and fill so- lenoid shut off prior to making these adjust- ments. Adjusting Brew Volumes The brewer is factory set to deliver 64 ounces ± 2 for each brew cycle.
Page 8 CDBC-APS/TC/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS 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 CDBC-APS/TC/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS (cont) W ater Sensing Threshold Adjustment Procedure 1. Make sure the tank is full of water to be used for calibration. The water must be in contact with the refill probe. 2. Unplug the brewer from the power source, then press and hold the BREW button while power is reapplied.
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.
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 (CDBC-APS/ TC/TS/TSR & CEZ-APS/TS/TSR) 2. Water shut off (CDBC-APS/TC/ TS/TSR & CEZ-APS/TS/TSR) 3.
Page 12 TROUBLESHOOTING (cont.) Fill or refill does not shut "OFF" (ON/ OFF Switch "ON") (cont) Fill or refill does not shut "OFF" (ON/ OFF Switch "OFF") PROBABLE CAUSE REMEDY PROBLEM 2a. Water Level Probe Sensing System (CDBC-APS/TS/TSR) 2b.
Page 13 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY HEATING CIRCUIT 1. Display flashing (CDBC-APS/TC/ TS/TSR) or ready light flashing (CEZ-APS/TS/TSR) 2. Water not touching temperature probe 3a. Dry Plug In Probe Sensing Sys- tem (CDBC-APS/TC/TS/TSR) 3b.
Page 14 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.
Page 15 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming (cont.) Brewer is making unusual noises 2a. Temperature Probe (CDBC-APS/ TC/TS/TSR) 2b. Temperature Probe (CEZ-APS/ TS/TSR) 3. Control Board (CDBC & CEZ) 1.
Page 16 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT Brew cycle will not start 1. Display flashing (CDBC-APS/TC/ TS/TSR) or ready light flashing (CEZ-APS/TS/TSR) 2. No water 3. No power or incorrect voltage to the brewer 4. ON/OFF switch not in the "ON" position 5.
Page 17 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) If the start switch (CEZ-APS/TS/ TSR) or switch panel (CDBC-APS/ TC/TS/TSR) is operating properly, proceed as follows. Attach a volt- meter to the terminals of the dis- pense valve solenoid.
Page 18 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (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.
Page 19 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) Dry coffee grounds remain in the funnel 1. Sprayhead 2. Funnel loading Make sure sprayhead is present and holes are clear and unobstructed. There should be separate streams of water coming out of each hole in the sprayhead.
Page 20 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 21 BUNN M AN UFA CTU RE D B Y BU NN-O -M AT IC C OR POR ATIO N SPR INGF IE LD, I LLINO IS , U.S .A . M OD EL S/ N V OLTS A .C. AMP W AT TS PH ASE W IRE HE RTZ COV ERE D UN DER O NE O R MORE OF TH.
Page 22 BUNN M A N U F A C T U R E D B Y B U N N - O - M A T I C C O R P O R A T I O N S P R IN G F I E L D , I L L IN O IS , U . S . A . M O D E L S / N V O L T S A .
Page 23 TRM2 J1 J2 J3 J4 J5 J6 J7 T RM1 CAUTION : WARMERS AND SURFACES ARE HOT SERVICE (cont.) CONTROL BOARD - Model CEZ-APS/TS/TSR Location: The Control Board is located inside the trunk behind the front access panel. Test Procedures: The test procedures for the control board will vary depending upon the problems experienced by the brewer.
Page 24 BUNN MANUFACTURED BY BUNN-O-MATIC CORPORATION SPRINGFIELD, ILL INOIS, U.S .A. MODEL S/N VOLTS A.C. AMP W ATTS PHAS E W IRE HERT Z COVERED UNDER ONE OR MOREOF THE FOLL OWING PATENTS : ONE OR MORE OT HER P ATE NTS MAY BE PENDING SERVICE (cont.
Page 25 BUNN MANUFACTURED BY BUNN-O-MATIC CORPORATION SPRINGFIELD, ILLINOIS, U.S.A. MODEL S/N VOLTS A.C. AMP WATTS PHASE WIRE HERTZ COVERED UNDE R ONE OR MOREOF THE FOLLOWING PATENTS : ONE OR M ORE OT.
Page 26 BUNN MANUFACTURED BY BUNN-O-MATIC CORPORATION SPRINGFIELD, ILLINOIS, U.S.A. MODEL S/N VOLTS A.C. AMP WATTS PHASE WIRE HERTZ COVERED UNDER ONE OR MOREOF THE FOLLOWING PATENTS : ONE OR MORE OTHE.
Page 27 BUNN M A NU FA CT URE D BY B UNN -O -M AT IC C O R PO R A T ION SP RIN G FIELD , IL L IN OIS , U .S .A. MO DEL S /N V OL T S A.C . AM P WA TT S P HA SE W IR E HE RT Z CO V ERE D U N DE R O NE O R M O R E OF T HE FOL L O WIN G P AT E NT S : ON E O R M O RE O TH ER PAT EN TS M A Y B E PE NDIN G SERVICE (cont.
Page 28 BUNN M A N U F A C T U R E D B Y B U N N - O - M A T I C C O R P O R A T I O N S P R I N G F I E L D , I L L I N O I S , U . S . A . M O D E L S / N V O L T S A .
Page 29 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 30 P1856 SERVICE (cont.) TANK HEATER (Cont.) BLK to Control Board WHI or RED to Terminal Block FIG. 14 TANK HEATER WIRING 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.
Page 31 T RM 2 J1 J2 J3 J4 J5 J6 J7 TR M1 CAUTION : WARMERS AND SURFACES ARE HOT 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.
Page 32 SCHEMA TIC WIRING DIAGRAM CDBC-APS/TS/TSR 29253 111103 EARL Y MODELS SOL 29257.0000B 12/99 ©1998 BUNN-O-MATIC CORPORATION TANK HEATER L1 GRN GRN RED-14 (MODEL 35) WHI-14 (MODELS 15 & 20) .
Page 33 SCHEMA TIC WIRING DIAGRAM CEZ-APS/TS/TSR WHI 29341.0000B 6/99 ©1998 BUNN-O-MATIC CORPORATION WHI WHI BREW SWITCH TANK HEATER GRN RED-14 (MODEL 35) WHI-14 (MODELS 15 & 20) N L2 BLU-14 "KEEP WARM" HEATER WHI SOL REFILL SOL DISPENSE TRM-1 TRM-2 J7-1 J7-2 J1-1 J1-8 J5-1 J5-6 C O N T R O L B O A R D COM N.
Page 34 LA TE MODELS 29253 021604 SOL SCHEMATIC WIRING DIAGRAM CDBC 15, 20 & 35 APS/TC/TS 29257.0001D 02/04 ©1999 BUNN-O-MATIC CORPORATION TANK HEATER L1 GRN RED-14 (MODEL 35) WHI-14 (MODELS 15 &.
An important point after buying a device Bunn CDBC (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 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 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn CDBC you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn CDBC will certainly help you make a decision on the purchase.
If you already are a holder of Bunn CDBC, 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.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn CDBC. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn CDBC 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
