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OPERATING & SERVICE MANUALBUNN-O-MATIC CORPORA T IONPOST OFFICE BOX 3227
N
ER
IO
NT
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C A
D DE
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PN:
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PN:
658
TWIN, TWIN APS
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FU
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AR
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198
198
IL UR
IL UR
FA
FA
PN:
PN:
658
658
CDBC
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Summary of Contents for Bunn TWIN APS
- Page 1 OPERATING & SERVICE MANUALBUNN-O-MATIC CORPORA T IONPOST OFFICE BOX 3227 TWIN, TWIN APS D DE IF : . CR D DR . SC . BO H FL . HE D EL . US S IN . OR E HO 5 BU...
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Page 2: Table Of Contents
REPAIR, REPLACEMENT OR REFUND. In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages. -
Page 3: User Notices
ELECTRICAL CODES. KEEP COMBUSTIBLES AWAY. FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE OR SHOCK HAZARD. READ THE ENTIRE OPERATING MANUAL BEFORE USING THIS PRODUCT 00986.0000E 5/98 ©1994 Bunn-O-Matic Corporation # 00656.0000 # 00658.0000 # 12364.0000 # 10044.0000 USER NOTICES # 03408.0002 # 03409.0002... -
Page 4: Electrical & Plumbing Requirements
90 psi (620 kPa) to reduce it to 50 psi (345 kPa). The water inlet fitting ⁄ " flare. Bunn-O-Matic does not recommend the use of a reverse-osmosis or deionized water supply to this equipment. -
Page 5: Operating Controls
Model CDBC TWIN 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, brewing and deenergizes the brew station warmer. Stopping a brew cycle after it has been started will not stop the flow of water into the decanter/server until the funnel is empty. -
Page 6: Initial Set-Up, Coffee Brewing, & Cleaning
NOTE: Repeat steps 1 through 9 for the other brew station. The brewer is now ready for use in accordance with the coffee brewing instructions below. ® Insert a BUNN filter into the funnel. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking. -
Page 7: Adjustments & Optional Settings
HIDDEN NOTE: The following adjustments must be performed for each Brew Station. ADJUSTMENTS & OPTIONAL SETTINGS Page 7 HIDDEN SWITCH... -
Page 8: Adjusting Brew Volumes & Water Sensing Threshold Adjustment
ADJUSTING BREW VOLUMES 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/server or graduated vessel beneath the funnel. 2. -
Page 9: Pulse Brew Setup Procedure
PULSE BREW SETUP PROCEDURE 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. 2. Position an empty container under the sprayhead. Allow the tank to finish refilling. Make sure that the READY lamp is on, or that the BREW LOCKOUT function is turned off. -
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. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. - Page 11 TROUBLESHOOTING (cont.) REFILL CIRCUIT PROBLEM Will not fill or refill Fill or refill does not shut "OFF" (ON/OFF Switch "ON") PROBABLE CAUSE 1. Power off to brewer 2. Water shut off 3. Display flashing 4. ON/OFF Switch 5. Lime build up on Probe 6.
- Page 12 TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBLEM Fill or refill does not shut "OFF" (ON/OFF Switch "OFF") PROBABLE CAUSE 2. Water Level Probe Sensing Sys- 3. Refill valve or control board 4. Water is too conductive for proper operation when using the factory setting of sensing threshold.
- Page 13 TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM Water does not heat to proper temperature 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. PROBABLE CAUSE 1.
- Page 14 TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM 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 PROBABLE CAUSE 4.
- Page 15 TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM Spitting or excessive steaming (cont.) Brewer is making unusual noises PROBABLE CAUSE 2. Temperature Probe 3. Control Board 1. Plumbing lines 2. Water supply 3. Lime build up Page 15 REMEDY Remove the probe from the grom- met and submerge in a water bath of approximately 70°F(21°C).
- Page 16 TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM Brew cycle will not start PROBABLE CAUSE 1. Display flashing 2. No water 3. No power or incorrect voltage to the brewer 4. ON/OFF switch not in the "ON" position 5. Low water temperature (Brew lockout is enabled) 6.
- Page 17 TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM Brew cycle will not start (cont.) Consistently low beverage level in the dispenser or beverage over- flows dispenser PROBABLE CAUSE 8. Control board or dispense valve 1. Brew volume 2. Lime build up 3. Dispense Valve Page 17 REMEDY If the switch panel is operating...
- Page 18 BUNN paper filters must be used for proper extraction. A fine or drip grind must be used for proper extraction. The BUNN ® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gen- tly.
- Page 19 There should be sepa- rate streams of water coming out of each hole in the sprayhead. The BUNN ® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gen- tly.
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Page 20: 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 Dry Plug - In Fault - Sheath of temperature probe dry for 10 minutes after power-up Temperature probe wiring Low Tank Level Fault - Level probe dry for 7 minutes after fill valve is energized Low Water Temperature Fault -... -
Page 21: Service
SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. - Page 22 three sections, Refill Circuit, Heating Circuit, and Brew- panel. ! S P 1873 Page 22...
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Page 23: Switch Panel
D IS IF : H ED . SC H EN H FL O IL D EL R EX IN J R IS IL U : 65 Page 23... -
Page 24: Control Board
SERVICE (cont.) DISPENSE VALVE D IS IF : O IL R IS IL U : 65 FIG. 4 DISPENSE VALVES Location: The dispense valves are located inside the top cover, attached to the sprayhead panels. Test Procedures: 1. Disconnect the brewer from the power source. 2. -
Page 25: Limit Thermostat
Page 25... -
Page 26: Tank Heater
SERVICE (cont.) TANK HEATERS FIG. 8 TANK HEATER Location: The tank heaters are located inside the tanks and secured to the tank bottoms. Test Procedures: 1. Disconnect the brewer from the power supply. 2. With a voltmeter, check the voltage across the red wire from the terminal block and the black wire from the control board. - Page 27 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.
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Page 28: Refill Valve
Page 28... -
Page 29: Warmer Elements
SERVICE (cont.) WARMER ELEMENT(S) FIG. 12 WARMER ELEMENTS Location: The warmer elements are located under the warmer plates. Test Procedures: 1. Disconnect the brewer from the power source. 2. Use the white wire from the terminal block and the other bottom wire on the "ON/OFF" switch. 3. -
Page 30: Wiring Diagrams
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