LCA-2 IC INSTALLATION & OPERATING GUIDE BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 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.
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor. 2) Electronic circuit and/or control boards: parts and labor for 3 years. 3) Compressors on refrigeration equipment: 5 years parts and 1 year labor.
INTRODUCTION The Liquid Coffee Ambient Iced Coffee Dispenser (LCA-2 IC) delivers two types of coffee made from liquid concentrate. The dispenser can be set up for continuous draw (by the cup) for self-serve applications, or portion-control to fill carafes and decanters for wait staff. Follow the Concentrate Manufacturer’s Storage and Shelf Life recommendations. This dispenser is designed to operate when ambient temperatures are from 32°F (0°C) minimum to 104°F (40°C) maximum. CONTENTS Warranty.............
USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protection. All notices are to be kept in good condition. Replace any unreadable or damaged labels. As directed in the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration (FDA), this equipment must be installed with adequate backflow prevention to comply with federal, state and local codes.
ELECTRICAL REQUIREMENTS CAUTION: The dispenser must remain disconnected from the power source until specified in Electrical HookUp. The LCA-2 IC dispenser is supplied with a 120-volt / 15 Amp cord set and requires 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.
INITIAL SET-UP NOTE: The LCA-2 IC weighs approximately 70 lbs. (31.8 kg). If necessary, use more than one person when lifting or moving the dispenser. 1. 2. 3. 4. 5. 6. Locate and remove the information packets and tube kits from top of packaging and set aside. Remove foam packing and cut around the bottom of box. Remove the box and the rest of the foam packing. Open the dispenser door and remove the drip tray and the lower splash guard panel. Set dispenser on the counter where it is to be used.
SELECTING THE CORRECT PUMP TUBING There are two pump tube sizes available for use with this dispenser. Look up the recommended tube size for the mix ratio of your concentrate, refer to the Tube Selection Chart. Dispense Rate 1.8 Oz/sec. (53 ml/sec.) TUBE SELECTION CHART Concentrate Ratios 25 30 35 40 45 50 55 60 65 70 75 80 3/16” I.D. TUBING 1/8” I.D. TUBING 85 90 95 100 Example: For a Dispenser Flow Rate of 1.8 Oz./sec (53 mL/sec) and a Mix Ratio of 60:1 – use 1/8” I.D. Tubing.
OPERATING CONTROLS AND INTERFACE 1. 2. 3. 4. Dispense Switches: Pull and Hold to dispense product. Stop Switch: Momentary switch stops all dispense functions. Alternate Portion Control Switch: Momentarily pushed to select the Alternate Portion Control Volume. Function Selector Switch: Allows the user to set the dispenser into different dispensing modes. a. Rinse: Dispenses water only- Flushes the mix chamber and dispense tip. b. Prime: Dispenses concentrates only – Primes the concentrate pump. c.
INITIAL POWER-UP 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 the machine will be ready for Programming as described in Programming Functions & Basic Operations.
Rinse Alarm Feature Periodic rinsing of the mix chambers and dispense tips is essential for proper maintenance and optimum performance of the dispenser. The automated Rinse Alarm feature has three levels of operation, Disabled, Warning Only and Warning with Brew Lockout, see chart for details. Alarm Level Selected Alarm Mode Disabled None Warning Only Rinse LED will come on 4 hrs prior to the selected time interval and remain on until the Rinse procedure has been performed.
PROGRAMMING THE DISPENSER Remove the lower splash guard assembly to access the digital programming module with LCD display. Press the Down Arrow key to enter 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. NOTE 1: Flashing menu items indicate which selection is active. NOTE 2: Values shown below are the factory default values for English units. NOTE 3: Values in [X - X] are the Min.
MENU SCREEN ACTION LF PRODUCT DISP .0GAL RESET? LF PRODUCT DISP .0GAL RT PRODUCT DISP .0GAL RESET? RT PRODUCT DISP .0GAL DESCRIPTION Select (RESET) to clear total Selecting Reset will clear the Current accumulated volume of mixed product dispensed through the Left dispenser. Gal (Liters) NONE Displays the Total accumulated volume of mixed product dispensed through the Left dispenser. Not Re-settable.
MENU SCREEN ACTION RINSE TIME ? (-) 12 Hrs (+) DESCRIPTION Use the (+) or (-) buttons to Enter the desired time between required Rinse adjust Rinse Alarm delay Cycles in hours, [8 - 24 hrs.] RINSE LOCKOUT ? NO EXIT YES Select (YES) to enable Select YES to Lockout dispensing until the Rinse Alarm has been cleared. Default is NO BIB EMPTY LOCKOUT NO EXIT YES Select (YES) to enable Select YES to Lockout dispensing until the Concentrate BIB has been replaced.
MENU SCREEN ACTION CAL LF WTR VOL (-) 36.0OZ (+) CAL LEFT SIDE ? EXIT YES DESCRIPTION Use the (+) or (-) buttons to Enter the volume of the water measured from the enter volume collected Left dispenser in Oz. (mL). NONE Scroll down to bypass this screen. CAL RIGHT SIDE ? EXIT YES Select (YES) to enable Selecting Yes will enable the Right Dispenser Calibration routine. Calibration routine, (see Pump Calibration) prior to calibrating the dispenser.
MENU SCREEN ACTION DESCRIPTION BIB EMPTY -> 250 (-) EXIT (+) Use the (+) or (-) buttons to Used to set the Conductance Threshold for the adjust empty BIB threshold Empty BIB warning. Default is 250 WTR START DELAY (-) .15SEC (+) Use the (+) or (-) buttons to Dispense Valve ON Delay. Eliminates weak mix adjust delay time at the beginning of a dispense. WTR STOP DELAY (-) .15SEC (+) Use the (+) or (-) buttons to Dispense Valve OFF Delay.
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. Open the dispenser door and locate the appropriate left or right BIB Adapter fitting. 4. Pull the Adapter fitting down and connect it to the BIB. (See Fig. 2) 5. Place the BIB upright in the machine, rotating it into position with the connector facing forward. 6.
OPERATING THE PULL & HOLD DISPENSER 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. b. Pull and Hold the corresponding dispense handle until the cup or other container is full. c. Remove cup or container. 2.
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. Daily: RINSING 1. Open the dispenser door. 2. Select Rinse on the Function Selector Switch and Run on the Mode Selector Switch. 3. Close the dispenser door. 4.
PREVENTIVE MAINTENANCE Bunn-O-Matic Corporation recommends that preventive maintenance be performed at regular intervals. Maintenance should be performed by a qualified service technician. For Technical Service, contact Bunn-O-Matic® Corporation at 1-800-286-6070. NOTE: Replacement parts or service caused by failure to perform required maintenance is not covered by warranty. Replace pump hoses every 6-Months or as needed.
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. • Shorting the terminals or the application of external voltages to electronic components may result in component or circuit board failure.
Troubleshooting (Continued) Left Refill LED “ON” Left BIB Empty Concentrate BIB is Empty. BIB Not properly connected Tubing kinked or blocked Empty BIB warning set too high Replace BIB, see Loading the Concentrate Check BIB Connector Fittings Check Tubing Installation Check Threshold, see Field Calibrating the Emoty BIB Warning Right Refill LED “ON” Right BIB Empty Concentrate BIB is Empty.
Troubleshooting (Continued) Dispenser Diagnostics-LCD Display Screen Displayed Possible Cause Troubleshooting Procedures LF TARGET RPM TOO HIGH !! 1. The Tube Size selected for the Left Refer to “Selecting the Correct Pump Hand Dispenser is too small for the Tubing” section of the manual. application. TUBE TOO SMALL CHECK DISP RATIO 2. The Ratio selected for the Left Hand Refer to recommended Dispense Ratio Dispenser is not correct for the on the product label. application.
Troubleshooting (Continued) Screen Displayed Possible Cause Troubleshooting Procedures LEFT PUMP FAULT! CHK PUMP WIRING CHK RPM SENSOR CHK TUBING AREA 1. Motor failure Service Required RT PUMP FAULT! CHK PUMP WIRING 1. Motor failure Service Required CHK RPM SENSOR CHK TUBING AREA COND PROBE FAULT CHECK COND PROBES CHK DISP SWITCHES CHK CONNECTIONS JUMPER FAULT! CONFIG NOT VALID 2. RPM Sensor failure Service Required 2. RPM Sensor failure Service Required 1.
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. Equipment Required: 50 to 100 ml graduated cylinder, with 1 ml graduations. 64 Oz (2000 ml) graduated container.
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. The dispenser will dispense water for 20 seconds and then shut OFF automatically. 15. Keep the graduated container under dispense tip until all the water stops dripping. 16.
SCHEMATIC WIRING DIAGRAM LCA-2 IC L1 N (120V 2-Wire) GRN WHI BLK PORTION CONTROL UNIVERSAL POWER SUPPLY -V +V N(L2) L(L1) -V +V WHI BLK GRN GRN RED DOOR TOUCHPAD RED 1 2 3 4 5 6 7 RED BLK GRN RED BLK BLU RIGHT RPM SENSOR RED BLK GRN RED BLK VIO BLK LEFT PUMP BLK RIGHT PUMP RED RED GRY ORN BLK BLK J14-1 BRN/BLK WHI/YEL YEL ORN WHI/ORN J3-1 J4-1 C O N T R O L P C B O A R D J7-1 J7-5 J7-10 J8-1 J8-3 BLU SOL BRN/WHI LEFT DISP J3-6 J14-7 VIO BLU RED YEL ORN BLK BLK RED WHI/ORN