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INTRODUCTION This equipment will automatically brew a half-gallon batch of coffee into an awaiting decanter at the press of a button. A hot water faucet is 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 ................................................................
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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. # 00986.0000 ! WARNING DO NOT OVERLOAD CIRCUIT. ALWAYS ELECTRICALLY GROUND THE CHASSIS OR ADAPTOR PLUG. DO NOT DEFORM PLUG OR CORD. FOLLOW NATIONAL AND LOCAL ELECTRICAL CODES. KEEP COMBUSTIBLES AWAY. FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE OR SHOCK HAZARD. READ THE ENTIRE OPERATING MANUAL B
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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 120V.A.C. NEUTRAL WHITE 120V.A.C. 208 or 240V.A.C. L1 BLACK NEUTRAL 120V.A.C. L1 BLACK Model 20 requires 2-wire, grounded service rated Model 35 requires 3-wire, grounded service rated 120 volts ac, 20 amp, single phase, 60 Hz. Proceed as 120/2
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OPERATING CONTROLS (cont.) ADDITIONAL WARMER SWITCHES (CDBC only) Pressing any additional warmer switch so that the indicator is glowing, supplies power to the associated warmer. READY INDICATOR This indicator glows when the preset temperature has been achieved. The word "NOT" above "READY" will glow in all other instances. TEMPERATURE INDICATORS (Feature disabled from the factory – refer to page 8.) The indicator glows to communicate the brew water temperature. Two indicators will glow when the
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POUR-OVER FEATURE If the brewer is equipped with a pour-over feature, follow the instructions below. 1. Remove the thumbscrew and pour-in lid from the top cover of the brewer and set aside. ® 2. Insert a BUNN filter into the funnel. 3. Pour fresh coffee grounds into the filter and level the bed of grounds by gently shaking. 4. Slide the funnel into the funnel rails. 5. Place an empty decanter beneath the funnel. 6. Measure 64 ounces of cold water in a container and slowly pour the water into the
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CDBC ADJUSTMENTS & OPTIONAL SETTINGS HIDDEN SWITCH P1866 Setting Brew Temperature The brewer is factory set to brew at 200°F (93˚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,
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ADJUSTMENTS & OPTIONAL SETTINGS (cont.) 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/server or graduated vessel beneath the funnel. 2. Place the "ON/OFF" switch in the "ON", upper position. 3. Press and hold the brew start button until you hear the brew solenoid click on-and-off three times (approximately 5 seconds). Release the button. 4. Allow the cycle
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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 (all models) Press warmer switches on control panel to determine if power is ON. 2. Water shut off (all models) Make sure water is ON. 3. Display flashing (CDBC) or ready Brewer has shut down due to light flashing (CEZ) malfunction (See Diagnostic Chart in manual, Page 19, or under top lid of brewer). 4. ON/OFF Switch (all models) Make sure ON/OFF Switch is "ON" and indicator is li
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TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBABLE CAUSE PROBLEM REMEDY Fill or refill does not shut "OFF" 1. Lime build up on probe (all Remove Probe and check for lime (ON/OFF Switch "ON") models) deposits on tip. Clean and reinstall. 2a. Water Level Probe Sensing A) Disconnect the brewer from the System (CDBC) 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. Pu
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TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper 1. Display flashing (CDBC) or ready Brewer has shut down due to temperature light flashing (CEZ) malfunction (See Diagnostic Chart in manual, Page 19, or under top IMPORTANT: Make sure no tem- lid). perature tests are taken before the ready light is "ON". Tank tempera- 2. Water not touching tempera- Remove probe and grommet. Look ture must be stabilized before read- ture probe into hole on tank li
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TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper 4a. Temperature Probe (CDBC) A) Remove the probe from the temperature (cont.) grommet and submerge in a water bath of approximately 70°F(21°C). IMPORTANT: Make sure no tem- Connect an ohmmeter to pins 3 perature tests are taken before the and 4 of the J3 connector. At ready light is "ON". Tank tempera- 60°F(16°C) the reading should be ture must be stabilized before read- 15.3k ± 2k OHMS, a
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TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 2a. Temperature Probe (CDBC) A) Remove the probe from the (cont.) 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°Cº the reading should be 11.8k ± 2k OHMS, and at 80°F(27°C) the read- ing should be 9.3k ± 2k OHMS. If the probe is within these param- et
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TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start 1. Display flashing (CDBC) or ready Brewer has shut down due to light flashing (CEZ) 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 Check for voltage across the black the brewer and white terminals at the termi- nal block. 4. ON/OFF switch not in the "ON" The indicator
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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 start switch (CEZ) or switch (all models) panel (CDBC) 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 volt- age is not present, refer to the wir
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from spray head 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 replace the valve if necessary.(See page 26) Weak beverage 1. Sprayhead A six-hole stainless steel spray- head must be used for proper extraction. 2. Water temperature Place an empty brew funnel on an empty decanter bene
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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 funnel and holes are clear and unob- structed. There should be six sepa- rate streams of water coming out of the sprayhead. ® 2. Funnel loading paper filter must be The BUNN centered in the funnel and the bed of grounds leveled by shaking gen- tly. Low beverage serving tempera- 1. Warmer Disconnect the brewer from the ture power source. Remove
