CEZ, CEZF, CDBC, CDBCF Airpot, Thermal Carafe & Thermal Server Brewers N ON ATI OR RP CO TIC .A. MA U.S -O- IS, NN BU ILLINO BY TTS ED FIELD, S/N WA RTZ: TUR ING HE TS FAC SPR TEN P PA AM E G WIR WIN LLO FO . A.C THE OF LTS G RE VO E DIN AS MO PH OR PEN E BE ON Y R MA DE TS UN TEN ED PA VER R HE CO OT RE MO E OR ON R E H O T N A C E S A U R U S A N D S NU R MA A U T IO N : W A R M E L N ON ATI OR RP CO TIC .A. MA U.
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. It is only for indoor use on a sturdy counter or shelf. CONTENTS Introduction & Warranty .................................................................................... 2 User Notices ............................................................................
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 # 10044.
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. L2 RED WHITE NEUTRAL L1 BLACK WHITE 120V.A.C. 120V.A.C. 208 or 240V.A.C. NEUTRAL 120V.A.C. L1 BLACK Model 20 requires 2-wire, grounded service rated 120 volts ac, 20 amp, single phase, 60 Hz.
OPERATING 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. Stopping a brew cycle after it has been started will not stop the flow of water into the server until the funnel is empty.
INITIAL SET-UP 1. 2. 3. 4. 5. 6. 7. 8. 9. Insert an empty funnel into the funnel rails. Place an empty server under the funnel. Connect the brewer to the power source. 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. Water will flow into the tank and stop when the tank is filled to its capacity. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature.
CEZ-APS/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS Page 7
CDBC-APS/TC/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS P1912 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" above the "ON/OFF" switch will glow to correspond with the temporary function change of this switch. Repeatedly press and release the "ON/OFF" switch until one of the bank of temperature indicators shows the approximate desired temperature.
CDBC-APS/TC/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS (cont) Water 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. 3. Continue pressing the BREW button until the READY indicator begins to flash. Release the BREW button and then press it again momentarily. 4.
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. All electronic components have 120 volt ac and low voltage dc potential on their terminals.
TROUBLESHOOTING (cont.) REFILL CIRCUIT PROBLEM PROBABLE CAUSE Will not fill or refill 1. Power off to brewer (CDBC-APS/ TC/TS/TSR & CEZ-APS/TS/TSR) Press ON/OFF switch on control panel to determine if power is ON. 2. Water shut off (CDBC-APS/TC/ TS/TSR & CEZ-APS/TS/TSR) Make sure water is ON. 3. Display flashing (CDBC-APS/TC/ TS/TSR) or ready light flashing (CEZ-APS/TS/TSR) Brewer has shut down due to malfunction (See Diagnostic Chart in manual, Page 19, or under top lid of brewer). 4.
TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBLEM PROBABLE CAUSE Fill or refill does not shut "OFF" (ON/ OFF Switch "ON") (cont) 2a. Water Level Probe Sensing System (CDBC-APS/TS/TSR) A) Disconnect the brewer from the power source. Disconnect the J3 connector from the control board. Check for continuity from the nut on top of the level probe to pin 1 of the plug, continuity should be present. Pull the temperature probe up about an inch from the grommet.
TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM PROBABLE CAUSE Water does not heat to proper temperature 1. Display flashing (CDBC-APS/TC/ TS/TSR) or ready light flashing (CEZ-APS/TS/TSR) Brewer has shut down due to malfunction (See Diagnostic Chart in manual, Page 19, or under top lid). 2. Water not touching temperature probe Remove probe and grommet. Look into hole on tank lid. Water must be within one inch from top of tank. 3a.
TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE Water does not heat to proper temperature (cont.) 4a. Temperature Probe (CDBC-APS/ TC/TS/TSR) IMPORTANT: Make sure no temperature tests are taken before the ready light is "ON". Tank temperature must be stabilized before readings are taken. 4b. Temperature Probe (CEZ-APS/ TS/TSR) Spitting or excessive steaming REMEDY A) Remove the probe from the grommet and submerge in a water bath of approximately 70°F(21°C).
TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming (cont.) 2a. Temperature Probe (CDBC-APS/ TC/TS/TSR) A) Remove the probe from the grommet and submerge in a water bath of approximately 70°F(21°C). Connect an ohmmeter to pins 3 and 4 of the J3 connector. At 60°F(16°C) the reading should be 15.3k ± 2k OHMS, at 70°F(21°C) the reading should be 11.8k ± 2k OHMS, and at 80°F(27°C) the reading should be 9.3k ± 2k OHMS.
TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start 1. Display flashing (CDBC-APS/TC/ TS/TSR) or ready light flashing (CEZ-APS/TS/TSR) Brewer has shut down due to malfunction (See Diagnostic Chart in manual, Page 19, or under top lid of brewer). 2. No water Water lines and valves to the brewer must be open. 3. No power or incorrect voltage to the brewer Check for voltage across the black and white terminals at the terminal block. 4.
TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) 8. Control board or dispense valve (CDBC-APS/TC/TS/TSR & CEZAPS/TS/TSR) If the start switch (CEZ-APS/TS/ TSR) or switch panel (CDBC-APS/ TC/TS/TSR) is operating properly, proceed as follows. Attach a voltmeter to the terminals of the dispense valve solenoid. Connect the brewer to the power source. Turn on the brewer and press the BREW switch.
TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead 1. Lime build up Inspect the tank assembly for excessive lime deposits. Delime as required. 2. Dispense valve Remove the dispense valve and clear any obstructions. Rebuild or replace the valve if necessary.(See page 26) 1. Sprayhead A clean stainless steel spray-head must be used for proper extraction. 2. Water temperature Place an empty brew funnel on an empty server beneath the sprayhead.
TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dry coffee grounds remain in the funnel 1. Sprayhead 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. 2. Funnel loading The BUNN® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gently.
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.
N N ATIO POR COR TIC A. -MA U.S. N-ONOIS, BUNILLI BY D, TS WATTZ RED FIEL S/N CTU ING HER S : UFA SPR ENT MAN PAT AMPE ING WIR LOW FOL . A.C THE TS EOF G VOL SE DIN MOR PHAOR PEN BE ONE ER S MAY ENT PAT ER E OTH R E H O T N A C E S A U W A R M E R S A N D S U R F B EL MOD N IO T MOR U OR : D UND ERE COV C A ONE ING CE N UR AR SO L OR ! W WER NEENT! PO Y PAON OM AN MP FR OF CO CT VAL ANY NE ON REMOT OF DISC REEMEN FO BE AC PL RE N N ATIO POR COR TIC A. -MA U.S.
A 8S 588. 217 c h 129. 893 588. 517 129. 694 N 588. 173 129. 855 N 588. ATIO894 PORc 128. COR 253 N TIC 589.
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N N IO AT OR RP CO IC AT U.S.A. -M -O OIS, NN BU ILLIN , BY TS ED FIELD S/N WAT Z RT HE S : NT TE P PA AM E ING WIROW LL E FO A.C.
SERVICE (cont.) BREW SWITCH (Start) - Model CEZ-APS/TS/TSR If continuity is present as described, reconnect the white/yellow wire to the top terminal and the white/ orange to the bottom terminal. If continuity is not present as described, replace the switch. N N IO AT OR RP CO IC AT U.S.A. -M -O OIS, NN BU ILLIN BY LD, TS ED WAT Z S/N UR NGFIE RT CT HE S : FA SPRI NT NU TE P MA PA AM E G IN WIROW LL E FO A.C.
N ON ATI OR RP CO TIC .A. MA U.S -O- IS, NN BU ILLINO BY TTS ED FIELD, S/N WA RTZ TUR ING HE TS : FAC SPR TEN P PA AM E G WIR WIN LLO FO . A.
SERVICE (cont.) LIMIT THERMOSTAT Removal and Replacement: 1. Remove the black and blue wires from limit thermostat terminals. 2. Carefully slide the limit thermostat out from under the retaining clip and remove limit thermostat. 3. Carefully slide the new limit thermostat into the retaining clip. 4. Refer to FIG. 12 when reconnecting the wires. N ON ATI OR RP CO TIC .A. MA U.S -O- IS, NN BU ILLINO BY TTS ED FIELD, S/N WA RTZ TUR ING HE TS : FAC SPR TEN P PA AM E G WIR WIN LLO FO . A.
SERVICE (cont.) If continuity is present as described, reconnect the wires, the tank heater is operating properly. If continuity is not present as described, replace the tank heater. TANK HEATER NOTE- If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath. P1855 FIG. 13 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.
SERVICE (cont.) TANK HEATER (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 green wire to the tank mounting bracket using #8-32 nut. 22. Connect the pink wire to the level probe. 23. Insert the temperature probe through the grommet in the tank lid. 24.
SERVICE (cont.) REFILL VALVE If continuity is not present as described, replace the refill valve. J1 6. Check the refill valve for coil action. Connect the brewer to the power source. With "ON/OFF" switch in the "ON' upper position press start switch and listen carefully in the vicinity of the refill valve for a" clicking" sound as the coil magnet attracts. 7. Disconnect the brewer from the power source.
SCHEMATIC WIRING DIAGRAM CDBC-APS/TS/TSR EARLY MODELS L1 N GRN LIMIT THERMOSTAT BLU-14 BLK-14 BLK-14 TANK HEATER WHI-14 (MODELS 15 & 20) RED-14 (MODEL 35) "KEEP WARM" HEATER WHI L2 WHI BLK BLK WHI COUNTER (OPTIONAL) C O N T R O L GRN BLK J1-1 BLK J1-2 BLU-14 COM BLK-14 N.O.
SCHEMATIC WIRING DIAGRAM CEZ-APS/TS/TSR GRN L1 AUXILIARY OUTLET BLK WHI N L2 GRN LIMIT THERMOSTAT BLK-14 BLK-14 BLU-14 WHI BLK TANK HEATER WHI-14 (MODELS 15 & 20) RED-14 (MODEL 35) "KEEP WARM" HEATER WHI ON/OFF SWITCH WHI REFILL COUNTER (OPTIONAL) TRM-1 TRM-2 COM N.O.
SCHEMATIC WIRING DIAGRAM CDBC 15, 20 & 35 APS/TC/TS LATE MODELS L1 N GRN LIMIT THERMOSTAT BLU-14 BLK-14 BLK-14 TANK HEATER WHI-14 (MODELS 15 & 20) RED-14 (MODEL 35) "KEEP WARM" HEATER WHI L2 WHI BLK COUNTER (OPTIONAL) C O N T R O L REFILL BLK J1-1 BLK J1-2 BLU-14 COM BLK-14 N.O.