Bunn CT Operating & Service Manual
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Bunn CT Operating & Service Manual

Bunn CT Operating & Service Manual

Bunn ct: service manual
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BUNN
OPERATING & SERVICE MANUAL
10841.0000F 02/03 ©1996 Bunn-O-Matic Corporation
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BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
®
CWT, CWTF,
SINGLE CW,
SINGLE CWF
C, CT, CTF,
www.bunnomatic.com

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  • Page 1 R IS IL U IL U : 65 : 65 OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION 10841.0000F 02/03 ©1996 Bunn-O-Matic Corporation ® POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 C, CT, CTF, CWT, CWTF,...
  • Page 2 SOLE OPTION AS SPECIFIED HEREIN, TO 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

    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. #00656.0000 #00831.0000 #00658.0000 CAUTION WARMERS AND SURFACES ARE HOT POUR IN WATER ONLY #02763.0000 #12364.0000...

  • 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 PLUMBING REQUIREMENTS (cont.) MODELS W/OUT FAUCET Models CT, CWT, CTF, CWTF, SINGLE CW & SINGLE CWF Flush the water line and securely attach it to the flare fitting on the strainer or tee. Turn on the water supply. On CTF, CWTF and SINGLE CWF Models, place an empty vessel beneath the faucet and lift the handle until water is dispensed.

  • Page 6: Initial Setup

    4B. Models CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF Connect the brewer to the power source, place the "ON/OFF" switch in the "ON" upper position, and momentarily press and release the start switch.

  • Page 7: Cleaning

    Pour one pitcher of tap water into the screened area on top of the brewer. 5B. Models CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF Place the "ON/OFF" switch in the "ON" upper position. Momentarily press and release the start switch.

  • 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 personnel.
  • Page 9 TROUBLESHOOTING (cont.) PROBLEM Brew cycle will not start (cont.) (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF) Water is not hot PROBABLE CAUSE 3. ON/OFF Switch 4. Start Switch 5. Timer 6. Solenoid Valve 7. Water strainer/flow control (.222 GPM)
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Inconsistent beverage level in dispenser Consistently low beverage level in the dispenser (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF) Spitting or excessive steaming PROBABLE CAUSE 1. Strainer/flow control (.222 GPM) (CT,CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW &...
  • Page 11 3. Solenoid Valve (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF) 1. Timer (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF) 1. Solenoid Valve (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW &...
  • Page 12 TROUBLESHOOTING (cont.) PROBLEM Weak beverage Dry coffee grounds remain in the funnel Brewer is making unusal noises (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF) PROBABLE CAUSE 1. Filter Type 2. Coffee Grind 3. Sprayhead 4.
  • Page 13 TROUBLESHOOTING (cont.) PROBLEM Brewer is making unusal noises (cont.)(CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF) Brewer is making unusal noises Low beverage serving tempera- ture Brewer does not change volume when half/full switch is changed.

  • Page 14: Table Of Contents

    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 15: Control Thermostat

    SERVICE (cont.) CONTROL THERMOSTAT MODEL C MODEL CWT MODEL SINGLE CW Location: The control thermostat is located inside the trunk on the left side of the component bracket. Test Procedures: Disconnect the brewer from the power source. Locate the blue wire on the control thermostat. Check the voltage across the blue wire on the control thermostat and the white insert on two pole 120 volt terminal block or three pole 120/...

  • Page 16: Limit Thermostat

    SERVICE (cont.) CONTROL THERMOSTAT (cont.) Slide the grommet to the line 4.5" above the bulb on the new capillary tube. Insert the capillary bulb through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid.

  • Page 17: On/Off Switch

    SERVICE (cont.) ON/OFF SWITCH - MODEL C D IS D IS IF : IF : D IS D IS IF : IF : D IS D IS IF : IF : D IS D IS IF : IF : ON/OFF SWITCH - MODEL CWT & SINGLE CW ®...
  • Page 18 SERVICE (cont.) ON/OFF SWITCH (cont.) Test Procedure: Disconnect the brewer from the power source. Viewing the switch from the back remove the white or red wire from the upper terminal and the black wire from the center terminal. Check the voltage across the white wire or red wire and the black wire with a voltmeter.

  • Page 19: Solenoid (Inlet)

    SERVICE (cont.) SOLENOID VALVE - CT, CWT & SINGLE CW Location: The solenoid valve is located inside the trunk on the lower center part of the component bracket. Test Procedures: Disconnect the brewer from the power source. Disconnect the white/blue and white/green wires from the solenoid valve.

  • Page 20: Start Switch (Brew)

    Refer to the following illustration when recon- necting the wires. PNK from timer TAN from timer START SWITCH - CT, CWT & SINGLE CW Location: P1153 The start switch is located in the center front of the hood.

  • Page 21: Tank Heater

    SERVICE (cont.) TANK HEATER Location: The tank heater is located inside the tank and secured to the tank lid. Test Procedures: Disconnect the brewer from the power supply. Check the voltage across the black and white wires on 120 volt models or the black and red wires for 120/240 volt models, 200 volt models and 230 volt models with a voltmeter.

  • Page 22: Tank Heater Switch

    SERVICE (cont.) TANK HEATER (Cont.) 15. Reconnect the wires to the limit thermostat, tank heater and control thermostat. See limit thermo- stat and control thermostat sections in this manual when reconnecting wires. 16. Install fill basin, secure with tank inlet fitting and gasket.
  • Page 23 Gently pull the thermostat sensor and grommet from the tank lid. Insert a tube to the bottom of the tank and syphon ALL of the water out. (BUNN-O-MATIC has #12440 syphon assembly available for this pur- pose. Gently reinstall the thermostat sensor and grom- met in the tank lid.

  • Page 24: Timer

    SERVICE (cont.) DIAL TIMER (Early Models) - CT & CWT Dial Timer Location: The timer is located inside the front of the trunk on the upper right side of component bracket. Test Procedure (Dial Timer). Disconnect the brewer from the power source.
  • Page 25 SERVICE (cont.) DIAL TIMER (Early Models) (cont.) To Main Wiring Harness WHI to Solenoid Valve BLK to Solenoid Valve Dial Timer DIGITAL BREW TIMER (Late Models) DIGITAL BREW TIMER Location: The timer is located inside the front of the trunk on the upper right side of component bracket.
  • Page 26 SERVICE (cont.) DIGITAL BREW TIMER (Late Models)(cont.) 4. Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 21 when reconnecting the wires. 5. Install new circuit board with spacers (as re- quired) to the component mounting bracket.

  • Page 27: Warmer Element

    SERVICE (cont.) WARMER ELEMENT(S) Location: The warmer element(s) is located under the warmer plate. Test Procedures: 1. Disconnect the brewer from the power source. 2. Use the white or red wire to the terminal block and the white/red, brown/black or violet wire to the "ON/OFF"...
  • Page 28 SCHEMATIC WIRING DIAGRAM C, CT & CWT HEATER LIMIT SWITCH THERMOSTAT ON/OFF SWITCH WHI/RED OPTIONAL FRESH LIGHT SYSTEM INDICATOR L.E.D. TIMER 120/240 VOLTS AC 3 WIRE 120 VOLTS AC 2 WIRE SINGLE PHASE 10836.0000E 07/00 ©1995 BUNN-O-MATIC CORPORATION READY (FAUCET...
  • Page 29 SWITCH THERMOSTAT ON/OFF SWITCH WHI/RED OPTIONAL DUAL WARMER ASSY (TOP OR SIDE) OPTIONAL SINGLE TOP WARMER ASSY 200 VOLTS AC 2 WIRE SINGLE PHASE 10836.0002E 07/00 ©1995 BUNN-O-MATIC CORPORATION READY (FAUCET OPTION ONLY) THERMAL SW. & THERMOSTAT FUSE WHI/RED OPTIONAL AUTOMATIC BREW CIRCUIT...
  • Page 30 THERMOSTAT ON/OFF SWITCH WHI/RED OPTIONAL DUAL WARMER ASSY (TOP OR SIDE) OPTIONAL SINGLE TOP WARMER ASSY 220-240 VOLTS AC 2 WIRE SINGLE PHASE 10836.0003E 07/00 ©1995 BUNN-O-MATIC CORPORATION READY (FAUCET OPTION ONLY) THERMAL SW. & THERMOSTAT FUSE "KEEP WARM" WHI/RED...

  • Page 31: Schematic Wiring Diagram

    SCHEMATIC WIRING DIAGRAM CWTF, CWTFB NO WARMER HEATER LIMIT SWITCH THERMOSTAT ON/OFF SWITCH WHI/RED OPTIONAL FRESH LIGHT SYSTEM L.E.D. INDICATOR TIMER 120/240 VOLTS AC 3 WIRE 100-120 VOLTS AC 2 WIRE SINGLE PHASE READY INDICATOR (FAUCET OPTION ONLY) SW. & THERMOSTAT THERMAL FUSE "KEEP WARM"...

  • Page 32: Wiring Diagrams

    SCHEMATIC WIRING DIAGRAM CWTFA NO WARMER READY INDICATOR LIMIT SW. & THERMOSTAT HEATER THERMOSTAT SWITCH ON/OFF SWITCH WHI/RED OPTIONAL FRESH LIGHT SYSTEM L.E.D. INDICATOR TIMER 230 VOLTS AC 2 WIRE SINGLE PHASE SCHEMATIC WIRING DIAGRAM READY HEATER LIMIT SW. & THERMOSTAT SWITCH THERMOSTAT ON/OFF...

This manual is also suitable for:

CtfCwtCwtfSingle cwSingle cwfC

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