Related Manuals for Bunn TWF-EZ
Summary of Contents for Bunn TWF-EZ
- Page 1 BUNN ® TWF-EZ OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 TELEPHONE: (217) 529-6601 FAX: (217) 529-6644 29466.0000C 8/00 © 1999 Bunn-O-Matic Corporation...
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Page 2: Table Of Contents
Bunn Authorized Service Representative during the warranty period. If Bunn determines that repair is not feasible, Bunn shall, at its sole option, replace the equipment or refund the purchase price for the equip- ment. -
Page 3: User Notices
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec- tion. All notices on the equipment should be kept in good condition. Replace any unreadable or damaged labels. #00831.0000 #00656.0000 #03408.0000 #03409.0000 USER NOTICES Page 3... -
Page 4: Electrical Requirements
" water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow. -
Page 5: Initial Set-Up
Insert the funnel (empty) into the funnel rails. Place an empty tea dispenser on the brewer base. Be prepared to empty the dispenser a few times. Plug in the brewer, place the TEA/OFF/COFFEE switch in the “COFFEE” position, and momentarily press the start switch. -
Page 6: Operating Controls
Begin each brew cycle with a clean empty brew funnel and server. (Be sure the server lid doesn’t interfere with the flow of dilution water.) ® Insert a BUNN filter into the funnel. Pour the packet of loose fresh tea leaves or coffee into the filter. Approximately four ounces is recom- mended for tea. -
Page 7: Adjustments And Optional Settings
TWF-EZ ADJUSTMENTS & OPTIONAL SETTINGS Adjusting Brew Volumes BREW VOLUME SET-UP: Use the following steps when setting up the brewer for the first time. 1. Place an empty funnel in the funnel rails and an empty decanter (when switch is in "COFFEE" position) or 3- gallon dispenser (when switch is in the "TEA"... -
Page 8: 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 person- nel. - Page 9 TROUBLESHOOTING (cont.) BREW CIRCUIT PROBLEM Ready Light Flashing Brew cycle will not start PROBABLE CAUSE 1. Brewer has shut down due to malfunction. 1. No water 2. No power or incorrect voltage to the brewer 3. TEA/OFF/COFFEE Switch 4. Start Switch 5.
- Page 10 TROUBLESHOOTING (cont.) BREW CIRCUIT PROBLEM Consistently low beverage level in the dispenser or beverage over- flows dispenser PROBABLE CAUSE 1. Brew volume (TEA or COFFEE) NOTE: All volumes to run with sprayhead attached. 2. Lime build up 3. Brew Solenoid Valves 4.
- Page 11 Refer to Adjustments and Optional Settings. See page 7 ® BUNN paper filters must be used for proper extraction. The BUNN ® paper filter must be centered in the funnel and the bed of tea leaves or coffee grounds lev- eled by shaking gently.
- Page 12 There should be seven separate streams of water coming out of the sprayhead. ® The BUNN paper filter must be centered in the funnel and the bed of tea leaves or coffee grounds lev- eled by shaking gently.
- 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. Spitting or excessive steaming Brewer is making unusual noises PROBABLE CAUSE 1.
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Page 14: Diagnostic Chart
Intermittent flashing of the READY indicator 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 Low Tank Level Fault - Level probe dry for 7 minutes after fill valve is energized Low Water Temperature Fault -... -
Page 15: 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 16: Brew Solenoid Valve (Hot Coffee)
SERVICE (cont.) BREW SOLENOID VALVE (HOT COFFEE) FIG. 2 HOT COFFEE BREW SOLENOID VALVE Location: Viewing the brewer from the rear the hot coffee brew solenoid valve is mounted on the left side of the mounting bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. -
Page 17: Brew Solenoid Valve (Iced Tea)
SERVICE (cont.) BREW SOLENOID VALVE (ICED TEA) FIG. 4 ICED TEA BREW SOLENOID VALVE Location: Viewing the brewer from the rear the iced tea brew solenoid valve is mounted in the center of the mount- ing bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. -
Page 18: Dilution Solenoid Valve
SERVICE (cont.) DILUTION SOLENOID VALVE FIG. 6 DILUTION SOLENOID VALVE Location: Viewing the brewer from the rear the dilution so- lenoid is mounted on the right side of the solenoid mounting bracket. Test Procedure: 1. Disconnect the brewer from the power source. 2. -
Page 19: Limit Thermostat
SERVICE (cont.) LIMIT THERMOSTAT FIG. 8 LIMIT THERMOSTAT Location: The limit thermostat is located inside the hood on the tank lid. Test Procedure: 1. Disconnect the brewer from the power source and remove the blue wire from the limit thermostat. 2. -
Page 20: Tea/Off/Coffee Switch
SERVICE (cont.) TEA/OFF/COFFEE SWITCH FIG. 10 TEA/OFF/COFFEE SWITCH Location: The TEA/OFF/COFFEE switch is located in the front of the hood, above and to the left of the brew funnel. Test Procedure: 1. Disconnect the brewer from the power source. 2. Remove the black and white/violet wires from the switch terminals. -
Page 21: Start Switch
SERVICE (cont.) START SWITCH FIG. 12 START SWITCH Location: The start switch is located in the front of the hood, above and to the right of the brew funnel. Test Procedure: 1. Disconnect the brewer from the power source. 2. Remove white/yellow and white/orange wires from the Start switch. -
Page 22: Tank Heater
SERVICE (cont.) TANK HEATER FIG. 14 TANK HEATER Location: The tank heater is located inside the tank and se- cured to the tank lid. Test Procedures: 1. Disconnect the brewer from the power supply. 2. With a voltmeter, check the voltage across the black and white wires. -
Page 23: Temperature Probe
SERVICE (cont.) TEMPERATURE PROBE FIG. 16 TEMPERATURE PROBE Location: The temperature probe is located on the tank lid, to the rear and left of the sprayhead tube. Test Procedures: 1. Disconnect the brewer from the power source. 2. Remove the temperature probe from the grom- met. -
Page 24: Thermal Fuse
SERVICE (cont.) THERMAL FUSE FIG. 18 THERMAL FUSE Location: The thermal fuse is located inside the hood con- nected to the right tank heater terminal. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the thermal fuse from the tank heater terminal and the limit thermostat. -
Page 25: Control Board
SERVICE (cont.) CONTROL BOARD FIG. 20 CONTROL BOARD Location: The Control Board is located inside the hood on the right front behind the Start switch. Test Procedure: The test procedures for the control board will vary depending upon the problems experienced by the brewer. -
Page 26: Wiring Schematic
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