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CDBC, CDBCF
CDBC APS, CDBCF APS
CDBC TC, CDBCF TC
(Dual Voltage Models
Starting at Serial #CDBC024477)
DISCONTINUED VERSION
The information in this manual
is no longer current.
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
29707.0001B 02/04 ©2003 Bunn-O-Matic Corporation www.bunnomatic.com
BUNN
CAUTION :
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INTRODUCTION This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured for 120V 15 amp, 120/208V 20 amp or 120/240V 20 amp. The brewer may have a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter or shelf. CONTENTS Introduction & Warranty .................................................................................... 2 User Notices ......................................................................
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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. Optional Field Wiring 120 V, 15.0 A, 1800 W 1PH, 2-Wire, 60HZ #29710.0005 (3 Warmers) CDBC(F)-DV BREWERS Optional Field Wiring #00658.0000 120 V, 12.5 A, 1500 W 1PH, 2-Wire, 60HZ #29710.0006 (No Warmer) CDBC(F) APS-DV BREWERS Optional Field Wiring 120/208-240 V, 15.6-17.5 A, 2980-3850 W 1PH, 3-
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USER NOTICES (CONT.) #02765.0000 #12364.0000 #00656.0000 29707.1 082803 Page 4
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Models CDBC-DV, CDBC-APS DV & CDBCF TC-DV ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Requirements for brewers without an attached cord set are as follows: 120V VERSION 120/208-240V VERSION Requires 2-wire, Requires 3-wire, grounded service grounded service rated 120 volts ac, rated 120/208-240 15 amp, single volts ac, 20 amp, phase, 60 Hz. single phase, 60 Hz. ELECTRICAL HOOK-UP CAUTION – Improper electrical installa
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PLUMBING REQUIREMENTS These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi (138 1 and 620 kPa) from a ⁄2" or larger supply line. A shut-off valve should be installed in the line before the brewer. Install a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi (345 kPa). The water 1 inlet fitting is ⁄4" flare. 1 3 NOTE - Bunn-O-Matic recommends ⁄4" copper tubing for installations of less than 25 feet and ⁄8"
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CLEANING 1. The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. 2. Check and clean the sprayhead. The sprayhead holes must always remain open. OPERATING CONTROLS 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 and br
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ADJUSTMENTS & OPTIONAL SETTINGS HIDDEN SWITCH P1866 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. When two indicators are glowing, the te
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ADJUSTMENTS & OPTIONAL SETTINGS (CONT.) until you hear the solenoid click on-and-off three times (approximately 10 seconds), then release the "BREW" switch. Momentarily press and release the "BREW" switch once for each ounce (approximate) of water to be added to the prior setting and allow the brew cycle to finish. To decrease the amount of water for each brew cycle place an empty funnel in the funnel rails and an empty decanter or graduated vessel beneath the funnel. Press the "ON/OFF" switch.
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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. Shorting of terminals or the appl
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TROUBLESHOOTING (cont.) REFILL CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Will not fill or refill 1. Power off to brewer Press OFF/ON switch on control panel to determine if power is ON. 2. Water shut off Make sure water is ON. 3. Display flashing Brewer has shut down due to mal- function (See Diagnostic Chart in manual, Page 20, or under top lid of brewer). Make sure ON/OFF Switch is "ON" 4. ON/OFF Switch and indicator is lit. Remove the Level Probe and check 5. Lime build up on Probe for lime depos
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TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Fill or refill does not shut "OFF" (ON/ 1. Lime build up on probe Remove Level Probe and check for OFF Switch "ON") lime deposits on tip. Clean and rein- stall. 2. Water Level Probe Sensing Sys- Disconnect the brewer from the tem 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 temper
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TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper tem- 1. Display flashing Brewer has shut down due to mal- perature function (See Diagnostic Chart in manual, Page 20, or under top lid). IMPORTANT: Make sure no tem- perature tests are taken before the Remove temperature probe and 2. Water not touching temperature ready light is "ON". Tank tempera- grommet. Look into hole on tank probe ture must be stabilized before read- lid. Water must be within
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TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper tem- 6. Tank Heater Disconnect the brewer from the perature (cont.) power source. Check for continuity between the white terminal of the IMPORTANT: Make sure no tem- terminal block (or red terminal on perature tests are taken before the 208/240volt models) and the black ready light is "ON". Tank tempera- wire on the relay on the control ture must be stabilized before read- board (Toggle Sw
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TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 1. Lime build up on temperature Inspect probe and tank assembly (cont.) probe, tank or tank heater for excessive lime deposits. Delime as required. 2. Temperature Probe 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. At 60°F(16°C) the reading should be 15.3k ± 2k OHMS, at 70°F(21°C) th
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TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start 1. Display flashing Brewer has shut down due to mal- function (See Diagnostic Chart in manual, Page 20, or under top lid of brewer). Water lines and valves to the brewer 2. No water must be open. Check for voltage across the termi- 3. No power or incorrect voltage to nals at the terminal block. the brewer The indicator lamp must be lit 4. ON/OFF switch not in the "ON" position Allow brewer to heat un
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) 8. Control board or dispense valve If the switch panel is operating prop- erly, proceed as follows. Attach a voltmeter to the terminals of the dispense solenoid. Connect the brewer to the power source. Turn on the brewer and press the BREW switch. Voltage should be present at the solenoid terminals. If voltage is not present, refer to the wiring diagrams and check the wiring har- ness
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead 1. Lime build up Inspect the tank assembly for ex- cessive lime deposits. Delime as required. 2. Dispense valve Remove the dispense valve and clear any obstructions. Rebuild or re- place the valve if necessary. (See page 24) Weak beverage 1. Sprayhead A clean sprayhead must be used for proper extraction. 2. Water temperature Place an empty brew funnel on an empty decanter beneath the spray- head
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dry coffee grounds remain in the 1. Sprayhead Make sure sprayhead is present and funnel holes are clear and unobstructed. (See Weak Beverage Page 18) ® 2. Funnel loading The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by shaking gen- tly. 1. Warmer Disconnect the brewer from the power source. Remove the warmer Low beverage serving temperature plate and turn upside down to ex- pose th
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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 after power-up Temperature probe wiring Fill valve wiring, function, & strainer Green wire between tank and circuit board 2 Low Tank Level Fault - Water pre
