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Bunn LCA-2 Installation & Operating Manual

Other manuals for LCA-2: Illustrated Parts Catalog
Manual is about: Liquid Coffee Ambient/Chilled Dispenser

Summary of LCA-2

  • Page 1

    ! W arni ng hot liqu ids ! A ver tiss eme nt liq uide s c hau ds po we r re ad y po rt ion rin se re fil l st op ! Ho t w at er lca-2 lca-2 pc lcc-2 installation & operating guide bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644...

  • Page 2

    2 34766 100908 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) compresso...

  • Page 3

    3 34766 030508 warranty .......................................................................... 2 introduction ..................................................................... 3 user notices .................................................................... 4 electrical requirements .........

  • Page 4

    4 11646.0002 00824.0001 40054.0000 reminder! Clean air filter weekly (located under the dispenser) recordatorio! Limpiar el filtro de aire semanalmente (localizado debajo del dispensador) air filter clean weekly! (located under the dispenser) filtro de aire limpiar semanalmente! (localizado debajo d...

  • Page 5

    5 electrical requirements caution: the dispenser must remain disconnected from the power source until specified in electrical hook- up. 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 a...

  • Page 6

    6 plumbing requirements the dispenser may be connected to a cold or hot water system (140°f max.) with operating pressure between 20 and 90 psi (138 and 620 kpa) from a 1/2” or larger supply line. A shut-off valve should be installed in the line before the dispenser. Install a regulator in the line ...

  • Page 7

    7 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 dis...

  • Page 8

    8 selecting the correct pump tubing there are two pump tube sizes available for use with this dispenser. To determine the correct tubing for you application, first determine the dispenser flow rate you intend to use, refer to setting dispenser flow rate. Then look up the recommended tube size for th...

  • Page 9

    9 operating controls and interface 1a. Dispense handles: pull and hold to dispense product. 1b. Dispense switches: push and release to dispense product for portion control models. 2. Stop switch: momentary switch stops all dispense functions. 3a. Hot water switch: push and hold switch to dispense ho...

  • Page 10

    10 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. The dispenser will automatically...

  • Page 11

    11 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...

  • Page 12

    12 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. Repeat steps 2 & 3 for the...

  • Page 13

    13 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 ...

  • Page 14

    14 menu screen action description lock flavor ? Exit yes flavors locked exit lf disp volume (-) 4.0oz (+) rt disp volume (-) 4.0oz (+) lf disp volume 1 (-) 4.0oz (+) lf disp volume 2 (-) 0.0oz (+) rt disp volume 1 (-) 4.0oz (+) rt disp volume 2 (-) 0.0oz (+) water disp vol 1 (-) 0.0oz (+) water disp...

  • Page 15

    15 tank temp 180 (-) exit (+) ready temp 175 (-) exit (+) cabinet temp 65 (-) exit (+) lf product disp .0gal reset? Lf product disp .0gal rt product disp .0gal reset? Rt product disp .0gal set password ? (-) 0 (+) select units eng exit metric chilled unit ? No exit yes rinse alarm ? No exit yes if n...

  • Page 16

    16 menu screen action description cal left pump ? Pull dispense cal lf pump vol (-) 43ml (+) cal lf wtr flow ? Pull dispenser cal lf wtr vol (-) 36.0oz (+) cal left side ? Exit yes cal right side ? Exit yes if no - go to cal right side menu. Cal left side ? Exit yes the following functions are for d...

  • Page 17

    17 menu screen action description cal right pump ? Pull dispenser cal rt pump vol (-) 43ml (+) cal rt wtr flow pull dispenser cal rt wtr vol (-) 36.0oz (+) cal right side ? Exit yes cal hot wtr flo ? Pull dispense cal hot wtr vol (-) 34.0oz (+) xxx cal -> xxx (-) tanktemp (+) place a 50 ml (#34843.1...

  • Page 18

    18 menu screen action description bib empty -> 500 (-) exit (+) xx refill -> 155 (-) exit (+) wtr start delay (-) .15sec (+) wtr stop delay (-) .15sec (+) test led’s ? No exit yes test switches ? Useswitchtotest test refill ? Exit yes test heater ? Exit yes enter asset # (-) 000000 (+) serial # lca ...

  • Page 19

    19 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 l...

  • Page 20

    20 filling cambros or other large containers: the dispenser is designed primarily for cups or other small containers that will fit under the dispense tips. However, it may be used to fill larger containers (up to 2 gal) by use of an extension hose on the dispense tip. Removing the flow restrictors w...

  • Page 21

    21 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 functio...

  • Page 22

    22 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 function...

  • Page 23

    23 replacing the pump tubing the pumps and tubing used in the dispenser are designed to give maximum performance and long life. However, the tubes are a wear item and must be replaced periodically. How long the tubes last is dependent on usage and properties of the concentrate. Excessive wear will r...

  • Page 24

    24 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. Pull out drain tube to empty into a s...

  • Page 25

    25 activate the dispenser within 5 sec. To dispense the pre-selected volume. 34766 042304 front panel led display messages alternate portion dispenser volume #2 has been selected portion led “on” portion dispense enabled rinse dispenser, see rinse procedure dispenser locked out rinse cycle required ...

  • Page 26

    26 troubleshooting (continued) replace bib, see loading the concentrate check bib connector fittings check tubing installation check threshold, see field calibrating the empty bib warning concentrate bib is empty. Bib not properly connected tubing kinked or blocked empty bib warning set too high rig...

  • Page 27

    27 screen displayed possible cause troubleshooting procedures dispenser diagnostics-lcd display troubleshooting (continued) 34766 011604 lf target rpm too high !! Tube too small check disp ratio rt target rpm too high !! Tube too small check disp ratio lf target rpm too low !! Tube too large check d...

  • Page 28

    28 screen displayed possible cause troubleshooting procedures troubleshooting (continued) 34766 011604 service required service required service required service required service required 1. Corresponding temperature sensor probe wire(s) broken or disconnected. 2. Evaporator temperature too low. 1. ...

  • Page 29

    29 screen displayed possible cause troubleshooting procedures troubleshooting (continued) 34766 010407 evap temp sensor out of range check wire for shorts left pump fault! Chk pump wiring chk rpm sensor chk tubing area rt pump fault! Chk pump wiring chk rpm sensor chk tubing area cooler fault! Evap ...

  • Page 30

    30 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 recalibrat...

  • Page 31

    31 34766 120105 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 of...

  • Page 32

    32 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 tm sensor reading drops below the minimum setting. The fa...

  • Page 33

    33 34766 010407 34641.0000j 09/06 © 2002 bunn-o-matic corporation 120 volts ac 2 wire 120/208-240 volts ac 3 wire 208-240 volts ac 2 wire single phase 50/60hz j14-1 j14-7 j18-1 j18-6 j7-1 j7-5 j7-10 j2-1 j2 -8 j3-1 j3-6 j4-1 j4-5 j5-1 j5-3 j6-1 j6-5 j6-1 0 j6-1 5 j6-2 0 j1-1 j1-4 j15-1 j15-4 c o n t...

  • Page 34

    34 34641.0003b 03/07 © 2007 bunn-o-matic corporation 120 volts ac 2 wire 120/208-240 volts ac 3 wire 208-240 volts ac 2 wire single phase 50/60hz j14-1 j14-7 j18-1 j18-6 j7-1 j7-5 j7-10 j2-1 j2 -8 j3-1 j3-6 j4-1 j4-5 j5-1 j5-3 j6 -1 j6 -5 j6 -1 0 j6 -1 5 j6 -2 0 j1-1 j1-4 j15-1 j15-4 c o n t r o l p...

  • Page 35

    35 34766 092706 34641.0001j 09/06 © 2002 bunn-o-matic corporation j14-1 j14-7 j7-1 j7-5 j7-10 j2-1 j2 -8 j3-1 j3-6 j4-1 j4-5 j5-1 j5-3 j6-1 j6-5 j6-10 j6-15 j6-20 j1-1 j1-4 j15-1 j15-4 c o n t r o l p c b o a r d j8-1 j8-3 j16-1 j16-5 j16-12 double pole limit thermostat orn blk blk blk wh i wh i tan...