Bunn CRT5 Operating & Service Manual
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Bunn CRT5 Operating & Service Manual

Bunn corporation grind and brew coffeemaker operating & service manual crt5, crtf5
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BUNN
®
CRT5
CRTF5
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10478.0000D 6/00 ©1996 Bunn-O-Matic Corporation

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  • Page 1 BUNN ® CRT5 CRTF5 OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 10478.0000D 6/00 ©1996 Bunn-O-Matic Corporation...

  • Page 2: Warranty

    SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, 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 # 12364.0000 # 00833.0000 10478 022800 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 PLUMBING REQUIREMENTS (cont.) MODELS W/OUT FAUCET Models CRT5, CRT5A & CRT5B 1. Remove the shipping cap from the bulkhead fitting on the rear of the brewer. 2. Attach the flare fitting from the short piece of tubing on the flow control (supplied) to the water inlet fitting at the rear of the brewer.

  • Page 6: Initial Setup

    CAUTION - The brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Insert an empty funnel into the funnel rails. 2. Place an empty dispenser under the funnel. 3. Place the heater switch at the rear of the brewer in the “OFF” lower position. 4.

  • Page 7: Cleaning

    NOTE – The "ON/OFF" switch must be in the "ON" upper position to initiate and complete a brew cycle. ® 1. Insert a BUNN filter into the funnel. 2. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking.

  • 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.) 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) 1. Tank Heater Switch 2. (A) Limit Thermostat (B) Thermal Cut-Off (Brewers with Faucet) CAUTION - Do not eliminate or...
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Inconsistent beverage level in dispenser Consistently low beverage level in the dispenser Spitting or excessive steaming PROBABLE CAUSE 1. Strainer /flow control (.222 GPM) 2. Syphon System 3. Lime Build-up CAUTION - Tank and tank components should be delimed regularly depending on local water conditions.
  • Page 11 TROUBLESHOOTING (cont.) PROBLEM Spitting or excessive steaming (cont.) Dripping from sprayhead Water flows into tank continu- ously (ON/OFF Switch "ON") Water flows into tank continu- ously (ON/OFF Switch "OFF") Beverage overflows dispenser PROBABLE CAUSE 2. Control Thermostat 1. Syphon System 2.
  • Page 12 A six-hole stainless steel spray- head must be used for proper extraction. The BUNN® paper filter must be centered in the funnel and the bed of ground leveled by gentle shak- ing. Place an empty funnel on an empty dispenser beneath the sprayhead.
  • Page 13 TROUBLESHOOTING (cont.) PROBLEM Brewer is making unusal noises (cont.) Low beverage serving tempera- ture PROBABLE CAUSE 4. Tank Heater 1. Warmer 2. ON/OFF Switch Page 13 REMEDY Remove and clean lime off the tank heater. See page 20 Refer to Service - Warmer element for testing procedures.

  • 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 SERVICE (cont.) CONTROL THERMOSTAT (cont.) Test Procedures: 1. Disconnect the brewer from the power source. 2. Locate the blue wire on the control thermostat. 3. 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 120/240 volt terminal blocks and the red insert on two wire 200 volt or 240 volt terminal block with a voltme-...

  • Page 16: Limit Thermostat

    SERVICE (cont.) LIMIT THERMOSTAT FIG. 4 LIMIT THERMOSTAT Location: The limit thermostat is located inside the rear of the hood on the tank lid. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the blue and black wires from the limit thermostat.
  • Page 17 SERVICE (cont.) ON/OFF WARMER SWITCH FIG. 6 ON/OFF WARMER SWITCHES Location: The ON/OFF switch(s) are located on the front of the hood. Test Procedure: 1. Disconnect the brewer from the power source. 2. Viewing the switch from the back remove the white or red wire from the upper terminal and the black wire from the center terminal.

  • Page 18: Solenoid (Inlet)

    SERVICE (cont.) SOLENOID VALVE FIG. 8 SOLENOID VALVE Location: The solenoid valve is located inside the trunk on the lower center part of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white and black wires from the solenoid valve.
  • Page 19 SERVICE (cont.) START SWITCH BREWERS W/FRESH LIGHT FIG. 10 START SWITCH Location: On brewers w/out fresh light the start switch is located in the right front of the hood. On brewers w/fresh light the start switch is located on the right side of the hood. Test Procedure: 1.

  • Page 20: Tank Heater

    SERVICE (cont.) TANK HEATER FIG. 12 TANK HEATER Location: The tank heater is located inside the tank and secured to the tank lid. Test Procedures: 1. Disconnect the brewer from the power supply. 2. 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 240 volt models with a voltmeter.
  • Page 21 SERVICE (cont.) TANK HEATER (Cont.) 13. Secure sprayhead tube to hood using a hex nut. 14. Install sprayhead. 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.

  • Page 22: Tank Heater Switch

    7. Gently pull the thermostat sensor and grommet from the tank lid. 8. Insert a tube to the bottom of the tank and syphon ALL of the water out. BUNN-O-MATIC has #12440.0000 syphon assembly available for this purpose. 9. Remove the two #8-32 screws securing the tank assembly to the hood.
  • Page 23 SERVICE (cont.) TANK HEATER SWITCH (cont.) 14. Reconnect the two black wires to the tank heater switch terminals. 15. Set tank assembly inside the hood on mounting brackets and secure with two #8-32 screws. 16. Reconnect the wires to the limit thermostat, tank heater and the control thermostat.

  • Page 24: Thermal Cut-Off

    SERVICE (cont.) THERMAL CUT-OFF (Brewers W/Faucet) Fig. 16 THERMAL CUT-OFF Location: The thermal cut-off is located inside the hood connected to the tank heater. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the thermal cut-off from the tank heater and the black wire from the control thermostat.
  • Page 25 SERVICE (cont.) TIMER (Early Models) FIG. 18 TIMER Location: The timer is located inside the front of the trunk on the upper right side of component bracket. Test Procedure. 1. Disconnect the brewer from the power source. 2. Disconnect the polarized, three pin connector from the brewer wiring harness and rotate the brew timer dial fully counterclockwise.

  • Page 26: Timer (Early Model)

    SERVICE (cont.) TIMER (cont.) If voltage is present as described, the brew timer is operating properly. Reset the timer dial as required, to obtain the desired brew volume. If voltage is not present as described, replace the timer. Removal and Replacement: 1.

  • Page 27: Digital Brew Timer (Late Model)

    SERVICE (cont.) DIGITAL BREW TIMER (Late Models) FIG. 20 DIGITAL BREW TIMER Location: The timer is located inside the front of the trunk on the upper right side of component bracket. Test Procedure NOTE: Do not remove or install wires while timer board is installed.
  • Page 28 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 29: Warmer Element

    SERVICE (cont.) WARMER ELEMENT(S) FIG. 22 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 or red wire to the terminal block and the white/red, yellow, white/violet, brown/black or violet wire to the "ON/OFF"...
  • Page 30 10478 061500 Page 30...
  • Page 31 10478 061500 Page 31...
  • Page 32 10478 061500 Page 32...

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