Bunn TNT-3 Operating & Service Manual
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Bunn TNT-3 Operating & Service Manual

Bunn TNT-3 Operating & Service Manual

Tnt-3, tntf-3 - operating & service manual
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BUNN
®
TNT-3
TNTF-3
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
TELEPHONE: (217) 529-6601 FAX: (217) 529-6644
28201.0000C 8/00 © 1997 Bunn-O-Matic Corporation

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  • Page 1 BUNN ® TNT-3 TNTF-3 OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 TELEPHONE: (217) 529-6601 FAX: (217) 529-6644 28201.0000C 8/00 © 1997 Bunn-O-Matic Corporation...

  • Page 2: Table Of Contents

    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

    Carefully read and follow all notices on the equipment and in this manual. They were written for your protection. 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 28201 081598...

  • 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

    PLUMBING REQUIREMENTS (cont.) BREWERS W/OUT FAUCET 1. Remove the shipping cap(s) from the bulkhead fitting(s) on the rear of the brewer. 2. Attach the flare fitting from the short piece of tubing on the strainer/flow control (supplied) to the water inlet fitting(s) at the rear of the brewer.

  • Page 6: Adjusting Brew Volumes

    INITIAL SET-UP (cont.) 13. Empty the dispenser. 14. Plug in the brewer and wait for the water in the tank to heat to brewing temperature (approximately 20 minutes). Some water will drip from the funnel during this time; this is due to expansion and should not occur thereafter.

  • Page 7: Operating Controls

    Starts a brew cycle when the ICED/OFF/HOT switch is in either the “ICED” or “HOT” position. 1. Begin brewing with a clean empty brew funnel and dispenser. (Be sure the dispenser is open.) ® 2. Insert a BUNN filter into the funnel. 3. Pour the fresh loose tea leaves into the filter.

  • 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.) PROBLEM Brew cycle(s) will not start (cont.) Brew water is not hot Dilution (Iced Tea) cycle will not start PROBABLE CAUSE 6. Brew Timer A) Iced Tea B) Hot Tea 7. Brew Solenoid Valve A) Iced Tea B) Hot Tea 8.
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Dilution (Iced Tea) cycle will not start (cont.) Inconsistent beverage level in dispenser (Hot Tea) Consistently high or low beverage level in the dispenser PROBABLE CAUSE 2. Start Switch 3. Brew Timer (Iced Tea) 4. Brew Solenoid Valve (Iced Tea) 5.
  • Page 11 TROUBLESHOOTING (cont.) PROBLEM Consistently high or low beverage level in the dispenser. (cont.) Spitting or excessive steaming Drip-out time too long Dripping from sprayhead PROBABLE CAUSE 2. External Strainer/Flow Control (.750 GPM) 1. Lime Build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi- tions.
  • Page 12 TROUBLESHOOTING (cont.) PROBLEM Water flows into tank continuously (ICED/OFF/HOT Switch in the "ICED or "HOT" position) Water flows into tank continuously (ICED/OFF/HOT Switch in the "OFF" position) Beverage overflows dispenser PROBABLE CAUSE 1. Brew Timer A) Iced Tea B) Hot Tea 1.
  • Page 13 A six-hole stainless steel spray- head must be used for proper ex- traction. ® The BUNN paper filter must be cen- tered in the funnel and the bed of tea leaves leveled by gentle shaking. Place an empty funnel on an empty dispenser beneath the sprayhead.

  • Page 14: 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 15: Brew Solenoid Valve (Hot Tea)

    SERVICE (cont.) BREW SOLENOID VALVE (HOT TEA) FIG. 2 HOT TEA BREW SOLENOID VALVE Location: Viewing the brewer from the rear, the hot tea 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 16: 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 17: Brew Timer (Hot Tea) (Early Models)

    SERVICE (cont.) BREW TIMER (HOT TEA - EARLY MODELS) OLD STYLE FIG. 6 HOT TEA BREW TIMER Location: The hot tea brew timer is located in the hood on the left side. It consists of a dial plate and circuit board. Test Procedure: 1.

  • Page 18: Digital Brew Timer (Hot Tea )(Late Models)

    SERVICE (cont.) BREW TIMER (HOT TEA - LATE MODELS) NEW STYLE FIG. 8 DIGITAL HOT TEA BREW TIMER Location: The hot tea brew timer is located in the hood, on the left side. Test Procedure. NOTE: Do not remove or install wires while timer board is installed.
  • Page 19 SERVICE (cont.) BREW TIMER (HOT TEA - LATE MODELS)(cont.) 1. Modifying brew volumes. To modify a brew vol- ume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. To increase a brew volume, place the ON/OFF switch in the “ON”...

  • Page 20: Brew Timer (Iced Tea) (Early Models)

    SERVICE (cont.) BREW TIMER (ICED TEA - EARLY MODELS) OLD STYLE FIG. 10 ICED TEA BREW TIMER Location: The iced tea brew timer is located in the hood on the right side. It consists of the dial plate and circuit board.

  • Page 21: Digital Brew Timer (Iced Tea)

    SERVICE (cont.) BREW TIMER (ICED TEA - LATE MODELS) NEW STYLE FIG. 12 ICED TEA BREW TIMER Location: The timer is located in the hood on the right side. Test Procedure. NOTE: Do not remove or install wires while timer board is installed.
  • Page 22 SERVICE (cont.) BREW TIMER (ICED TEA - LATE MODELS)(cont.) 1. Modifying brew volumes. To modify a brew vol- ume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. To increase a brew volume, place the ON/OFF switch in the “ON”...

  • Page 23: Control Thermostat

    SERVICE (cont.) CONTROL THERMOSTAT FIG. 14 CONTROL THERMOSTAT Location: The control thermostat is located inside hood on the right side just behind the iced tea brew timer. Test Procedures: 1. Disconnect the brewer from the power source. 2. With a voltmeter, check the voltage across the blue wire on the control thermostat and the white wire on the tank heater for 120 volt two wire models or red wire on the tank heater for 120/208 volt three...

  • Page 24: Dilution Solenoid Valve

    SERVICE (cont.) DILUTION SOLENOID VALVE FIG. 16 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 which is secured to the trunk base. Test Procedure: 1.

  • Page 25: Limit Thermostat

    SERVICE (cont.) LIMIT THERMOSTAT FIG. 18 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 black wire from the limit thermostat. 2.

  • Page 26: Iced/Off/Hot Switch

    SERVICE (cont.) ICED/OFF/HOT SWITCH FIG. 20 ICED/OFF/HOT SWITCH Location: The ICED/OFF/HOT 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 27: Start Switch

    SERVICE (cont.) START SWITCH FIG. 22 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 the wires from all four terminals. 3.

  • Page 28: Tank Heater

    SERVICE (cont.) TANK HEATER FIG. 24 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 on 120 volt models or the black and red wires for 120/208 volt models with a voltmeter.

  • Page 29: Thermal Fuse

    SERVICE (cont.) THERMAL FUSE (Models W/Faucet Only) FIG. 26 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 right tank heater terminal and the black lead from the con- trol thermostat.

  • Page 30: Wiring Diagram

    28201 081598 Page 30...

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Tntf-3

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