Bunn LCA-2 PC Installation & Operating Manual
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Bunn LCA-2 PC Installation & Operating Manual

Liquid coffee ambient/chilled dispenser
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INSTALLATION & OPERATING GUIDE
To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts
Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at
www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and
manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
34766.0000N
11/08 ©2002 Bunn-O-Matic Corporation
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601
LCA-2 PC
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FAX: (217) 529-6644
LCA-2
LCC-2

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  • Page 1 To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.

  • Page 2: Warranty

    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: Table Of Contents

    CONTENTS Warranty ................2 Brew Temperature Lockout Feature ........ 12 Introduction ..............3 Programming the Dispenser Flow Rate ......13 User Notices ..............4 Loading the Concentrate ..........19 Electrical Requirements ........... 5 Priming the Concentrate Lines ........19 CE Requirements ............. 5 Operating the Pull &...

  • Page 4: User Notices

    USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protec- tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels. This equipment must be installed to comply with the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Adminis-...

  • Page 5: Electrical Requirements

    ELECTRICAL REQUIREMENTS CAUTION: The dispenser must remain disconnected from the power source until specified in Electrical Hook- The LCA-2 and LCC-2 dispensers are supplied with a 120-volt / 15 Amp cord set and require a 2-wire, grounded, individual branch circuit rated for 120 volts AC, 15 amp, single phase, 60Hz. The mating connector must be a NEMA 5-15R.

  • Page 6: Plumbing Requirements

    Bunn-O-Matic does not recommend the use of a saddle valve to install the dispenser. The size and shape of the hole made in the supply line by this type of device may restrict water flow.

  • Page 7: Setting Dispenser Flow Rate

    SETTING DISPENSER FLOW RATE The dispenser comes from the factory with flow restrictors in the mix chambers. With the restrictors in place the dispense rate is about 1.8 oz./sec (53.2 ml/sec) and is used primarily for cup at a time dispensing. The flow restrictors can be removed to increase the dispense rate to about 2.5 oz./sec (74 ml/sec) for larger volume dispensing (airpots, carafes, etc.).

  • Page 8: Selecting The Correct Pump Tubing

    2. Depress the tension screw and remove it from the notch in the pump body, releasing the spring tension on the pump band. 3. Apply lubricant (BUNN-O-MATIC part number M2531.0001) to the new pump tubing. 4. Insert the tubing onto the mix chamber port and wrap the tubing around the pump rotor, making sure that the elbow and clamps end up on the bottom side of the pump body.

  • Page 9: Operating Controls & Interface

    14. Programming Keypad: Used in conjunction with the LCD display to program and calibrate the dispenser to customer specific requirements. (Located behind the splash guard panel) 15. LCD Display: Displays programming menus and fault messages. (Located behind the splash guard panel) BUNN ICED COFFEE AMBIENT UNIT...

  • Page 10: Initial Fill & Heat

    INITIAL FILL & HEAT 1. Select Normal on the Function Selector Switch and Run on the Mode Selector Switch. 2. Confirm the water supply is on. 3. Connect the dispenser to the power source. The Red POWER LED will illuminate and water will begin flowing into the tank.

  • Page 11: Flavorgard™ Feature

    FlavorGard™ Feature FlavorGard™ is a patented feed back control loop that monitors the mixed product and adjusts the concentrate delivery rate to maintain a consistent mix profile, i.e. Flavor Profile. The system consists of a conductance probe mounted in the final stages of the mixing chamber, a metering pump with RPM sensor and a digital controller. Once you have completed the installation of the dispenser, entered the desired mix ratio for your concentrate, dispensed several cups of the mixed product, and are satisfied with the Flavor and Strength being delivered, simply enable FlavorGard™, (refer to FlavorGard™...

  • Page 12: Bib Empty Lockout Feature

    Rinse Procedure: 1. Open the cabinet door and select Rinse on the Function Selector switch – close the door. 2. Place a 2 Liter (1/2 Gal) container under the Left dispense tip. 3. Activate the Left dispenser until water flow stops automatically, approximately 20 sec. 4.

  • Page 13: Programming The Dispenser Flow Rate

    PROGRAMMING THE DISPENSER Remove the lower splash guard assembly to access the digital programming module with LCD display. Press the Down Arrow key to inter the programming menu. Use the Up and Down Arrow keys to scroll through the menu screens. Select Exit to leave the programming function and return to normal operations.
  • Page 14 EXIT accepted. Scroll down to continue. Portion Control Settings for Pull and Hold Dispensers For Portion Control Dispensers (LCA-2 PC, LCA-2C PC, LCA-2A PC) go to Full Time Portion Control Settings LF DISP VOLUME Use the (+) or (-) buttons Set the volume to be dispensed during a Left (-) 4.0oz (+)
  • Page 15 MENU SCREEN ACTION DESCRIPTION TANK TEMP 180 Use the (+) or (-) buttons to Sets the water Tank temperature [120 - 200°F] (-) EXIT (+) adjust the target Temp. or [49 - 93°C] READY TEMP 175 Use the (+) or (-) buttons to Sets the hot water Ready temperature.
  • Page 16 MENU SCREEN ACTION DESCRIPTION Use the (+) or (-) buttons to Enter the desired time between required Rinse RINSE TIME ? adjust Rinse Alarm delay Cycles in hours, [8 - 24 hrs.] (-) 12 Hrs (+) Select (YES) to enable Select YES to Lockout dispensing until the Rinse RINSE LOCKOUT ? Alarm has been cleared.
  • Page 17 CAL RIGHT SIDE ? NONE Scroll down to bypass this screen. EXIT YES For Portion Control Dispensers (LCA-2 PC, LCA-2C PC, LCA-2A PC) only CAL HOT WTR FLO ? Place a 64 Oz. (2000 mL) The Hot Water Dispenser will dispense for 20 container under the Hot Water seconds, then shut off automatically.
  • Page 18 MENU SCREEN ACTION DESCRIPTION BIB EMPTY -> 500 Use the (+) or (-) buttons to Used to set the Conductance Threshold for the EXIT adjust empty BIB threshold Empty BIB warning. Default is 500 XX REFILL -> 155 Use the (+) or (-) buttons to Used to set the Conductance Threshold for the (-) EXIT (+) adjust Refill threshold...

  • Page 19: Loading The Concentrate

    LOADING THE CONCENTRATE 1. Thoroughly mix concentrate by vigorously shaking the product Bag-In-Box (BIB). 2. Pull the BIB connector through the hole provided in the box and place it on the drip tray with the connector facing up. (See Fig. 1) 3.

  • Page 20: Operating The Pull & Hold Dispenser

    OPERATING THE PULL & HOLD DISPENSER (Models LCA-2, LCA-2C, LCA-2A, LCC-2, LCC-2C, LCC-2A) Set the Function Selector Switch to Normal and the Mode Selector Switch to Run. 1. Pull and Hold Dispense Mode (Cup at a time) a. Place cup on the cup tray beneath the desired dispensing tip. For a large container, flip the cup tray up and place the container on top of the drip tray.

  • Page 21: Operating The Preset Portion Control Dispenser

    OPERATING THE PRESET PORTION CONTROL DISPENSER (Models LCA-2 PC, LCA-2C PC, LCA-2A PC) Set the Function Selector Switch to Normal and the Mode Selector Switch to Run. Dispensing Preset Portions of Coffee or Hot Water 1. Primary Volume Portion Dispense Mode. (Volume 1) Refer to Programming Functions on how to set this amount.

  • Page 22: Cleaning & Preventive Maintenance

    CLEANING & PREVENTATIVE MAINTENANCE General Cleaning and Sanitizing Procedures Note: The BUNN Liquid Coffee Dispenser incorporates a “user selectable” rinse reminder feature, which lights ® the Rinse LED on the front panel and disables dispensing when it is time to rinse. See Programming Functions to activate this feature.

  • Page 23: Replacing The Pump Tubing

    How long the tubes last is dependent on usage and properties of the concentrate. Excessive wear will reduce the output of the pumps resulting in a weak mixed beverage. Bunn-O-Matic recommends replacing the Pump Tubing a minimum of once every 6 months or sooner if warranted.

  • Page 24: Draining The Hot Water

    DRAINING THE HOT WATER TANK CAUTION: The dispenser must be disconnected from the power source throughout these steps. 1. Disconnect the dispenser from the power source. 2. Shut off and disconnect the incoming water supply. 3. Remove the front splash panel. 4.

  • Page 25: Troubleshooting

    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. • Only qualified service personnel should perform inspection, testing, and repair of electrical equipment.
  • Page 26 Troubleshooting (Continued) Left Refill LED “ON” Concentrate BIB is Empty. Replace BIB, see Loading the Concentrate Left BIB Empty BIB Not properly connected Check BIB Connector Fittings Tubing kinked or blocked Check Tubing Installation Empty BIB warning set too high Check Threshold, see Field Calibrating the Emoty BIB Warning Right Refill LED “ON”...
  • Page 27 Troubleshooting (Continued) Dispenser Diagnostics-LCD Display Screen Displayed Possible Cause Troubleshooting Procedures LF TARGET RPM 1. The Tube Size selected for the Left Refer to “Selecting the Correct Pump TOO HIGH !! Hand Dispenser is too small for the Tubing” section of the manual. application.
  • Page 28 Troubleshooting (Continued) Screen Displayed Possible Cause Troubleshooting Procedures OVERFLOW CUP 1. Refill valve stuck open Service Required FULL. EMPTY CUP 2. Faulty refill probe Service Required 3. Faulty overflow switch Service Required HEATING TIME TOO 1. Tank Heater failure Service Required LONG 2.
  • Page 29 Troubleshooting (Continued) Screen Displayed Possible Cause Troubleshooting Procedures EVAP TEMP SENSOR 1. Corresponding Temperature Sensor Service Required OUT OF RANGE Probe wire(s) shorted to housing, or to each other. CHECK WIRE FOR SHORTS 2. Evaporator temperature too high. Service Required LEFT PUMP FAULT! 1.

  • Page 30: Field Calibration Of The Concentrate Pumps

    Field Calibration of the Concentrate Pumps / Dispenser Flow Rates The factory set Default Values for the Pump & Dispenser Flow Rates are very accurate and typically do not need to be field calibrated. However, if the mix ratio accuracy is ever in question, this procedure can be used to recalibrate the unit in the field.

  • Page 31: Dispenser Flow Rate Calibration

    Field Calibration of the Concentrate Pumps / Dispenser Flow Rates (Continued) Dispenser Flow Rate Calibration 13. Press Down Arrow Key to display the CAL LF WTR FLO menu screen. 14. Place a 64 Oz (2000 ml) graduated container under Left Dispense Tip and Pull the Left Dispense Handle momentarily.

  • Page 32: Field Calibrating The Empty Bib Warning

    Field Calibrating the Empty BIB Warning The dispenser will automatically turn on the Left or Right “REFILL LED”, see Operating Controls and Interface, when the corresponding BIB is Empty. The Refill message is triggered when the FlavorGard sensor reading drops below the minimum setting. The factory set minimum is 500 and should be correct for most locations. However, in some areas the hardness of the local water supply may effect this reading.

  • Page 33: Schematic Wiring Diagrams

    WHI/VIO COOLING CABINET PRIME CABINET THERMISTOR 120 VOLTS AC 2 WIRE 120/208-240 VOLTS AC 3 WIRE 208-240 VOLTS AC 2 WIRE SINGLE PHASE 50/60HZ 34641.0000J 09/06 © 2002 BUNN-O-MATIC CORPORATION LLC Models only Models without Master ON/OFF Switch 34766 010407...
  • Page 34 WHI/YEL NITE RINSE THERMISTOR WHI/VIO 120 VOLTS AC 2 WIRE PRIME 120/208-240 VOLTS AC 3 WIRE 208-240 VOLTS AC 2 WIRE LLC Models only SINGLE PHASE 50/60HZ 34641.0003B 03/07 © 2007 BUNN-O-MATIC CORPORATION Models with Master ON/OFF Switch 34766 031907...
  • Page 35 WHI/BLK THERMISTOR PELTIER t° J1-16 SELECTOR SELECTOR SWITCH SWITCH WHI/GRY WHI/YEL t° NITE RINSE COOLING CABINET CABINET 230 VOLTS AC THERMISTOR WHI/VIO PRIME 2 WIRE SINGLE PHASE 50 HZ 34641.0001J 09/06 © 2002 BUNN-O-MATIC CORPORATION LCC Models only 34766 092706...

This manual is also suitable for:

Lca-2aLcc-2Lca-2

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