Bunn LCA-2 PC, LCC-2 User Manual

RNI

HOT

LIQU

LCA-2

LCA-2 PC

LCC-2

INSTALLATION & OPERATING MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601 FAX: (217) 529-6644

To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.

www.bunnomatic.com

CONTENTS

Warranty .......................................................................... 2

Introduction ..................................................................... 3

User Notices .................................................................... 3

Electrical Requirements ...................................................4

Plumbing Requirements .................................................. 5

Initial Set-up .................................................................... 5

Electrical Hook-up ............................................................ 5

Plumbing Hook-up ........................................................... 5

Setting Dispenser Flow Rate ............................................ 6

Selecting the Correct Pump Tubing .................................. 7

Operating Controls & Interface ........................................ 8

Initial Fill & Heat ...............................................................9

FlavorGard™ Feature ...................................................... 10

Rinse Alarm Feature ....................................................... 10

BIB Empty Lockout Feature ............................................ 11

Programming the Dispenser Flow Rate ..........................12

Loading the Concentrate ................................................ 18

Priming the Concentrate Lines ....................................... 18

Operating the Pull & Hold Dispenser .............................. 19

Operating the Preset Portion Control Dispenser ............ 20

Filling Cambros or other large containers ...................... 20

Cleaning & Preventive Maintenance ............................... 21

Replacing the Pump Tubing ...........................................22

Draining the Hot Water................................................... 23

Troubleshooting ............................................................. 24

Field Calibration of the Concentrate Pumps ...................29

Dispenser Flow Rate Calibration .................................... 30

Field Calibrating the Hot Water Flow Rate ...................... 30

Field Calibrating the Empty BIB Warning ........................ 31

Schematic Wiring Diagrams ........................................... 32

Brew Temperature Lockout Feature ................................ 11

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.

4) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years or 30,000 pounds of coffee, whichever comes ﬁrst. These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or casualty. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Ofﬁce Box 3227, Springﬁeld, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under warranty. THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL,

EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make

modiﬁcations to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not be relied upon. If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the applicable parts and labor warranty periods speciﬁed above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for the equipment. THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS

EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S 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.

34766 010407

INTRODUCTION

This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A., comply with the applicable Plumbing /SanitationCode.

Optional Field Wiring

208-240 V, 25.8 A, 6200 W 1PH, 2-Wire + GND, 60HZ

120/208-240 V, 25.8 A, 6200 W

1PH, 3-Wire + GND, 60HZ

To reduce the risk of electric shock, do not remove or open cover. No user-serviceable parts inside. Authorized service personnel only. Disconnect power before servicing.

The Liquid Coffee Ambient Dispenser (LCA-2) and the Liquid Coffee Chilled Dispenser (LCC-2) delivers two types of coffee plus hot water. 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. Product Flavor Proﬁle is extended with chilled product storage cabinet featured in the LCC-2.

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.

00656.0000

00986.0002

37881.0000

28181.0003

11646.0002

34766 010407

ELECTRICAL REQUIREMENTS

120V A.C.

208 or

240V A.C.

HEATER RED

208 or

240V A.C.

120V A.C.

10A. FUSE - WHITE

HEATER RED

10A. FUSE - WHITE

10A. FUSE - BLACK

LIMIT SW. - BLACK

HEATER RED

10A. FUSE - WHITE

10A. FUSE - BLACK

LIMIT SW. - BLACK

10A. FUSE - BLACK

LIMIT SW. - BLACK

FIELD WIRING TERMINAL BLOCK DIAGRAM

For all 208 - 240 Volt Connections: Use No. 10 AWG Wires suitable for 90°C (194 °F)

1. Unit shipped per Fig. 1, wired for 120V A.C./2-Wire.

2. For 208 - 240V A.C./2-Wire per Fig. 2: Move both the Red-Heater wire and the White-Fuse wire to the Top Red Terminal as shown.

3. For 120/208 - 240V A.C./3-Wire per Fig. 3: Move the Red Heater wire to the Top Red Terminal as shown.

Fig. 1 Fig. 2 Fig. 3

120V A.C.

208 or

240V A.C.

RED

208 or

240V A.C.

120V A.C.

TO MASTER

ON/OFF SWITCH

BLACK

RED

TO MASTER

ON/OFF SWITCH

BLACK

RED

TO MASTER

ON/OFF SWITCH

BLACK

FIELD WIRING TERMINAL BLOCK DIAGRAM

For all 208 - 240 Volt Connections: Use No. 10 AWG Wires suitable for 90°C (194°F)

1. Unit shipped per Fig. 1, wired for 120V A.C./2-Wire.

2. For 208 - 240V A.C./2-Wire per Fig. 2.

3. For 120/208 - 240V A.C./3-Wire per Fig. 3.

Fig. 1 Fig. 2

Fig. 3

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 amp, single phase, 60Hz. The mating connector must be a NEMA 5-15R.

The LCA-2C and LCC-2C dispensers are supplied with a 120-volt / 20 Amp cord set and require a 2-wire,

grounded, individual branch circuit rated for 120 volts AC, 20 amp, single phase, 60Hz. The mating connector must be a NEMA 5-20R.

These dispensers can be Field Wired for 208 or 240 volt applications. This requires a 2 or 3-wire, grounded,

individual branch circuit rated for 208/240 volts AC, 30 amp, single phase, 60 Hz.

NOTE: The internal terminal block must be rewired for 208/240 applications, (see Optional Field Wiring Diagram).

FIELD WIRING TERMINAL BLOCK DIAGRAM

Models without Master ON/OFF Switch

FIELD WIRING TERMINAL BLOCK DIAGRAM

Models with Master ON/OFF Switch

34766 010407

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 when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi (345 kPa). The water inlet ﬁtting is 3/8” ﬂare. Dispensers set up to deliver to 1.8 Oz./sec. (53.2 ml/sec) per dispense tip, require a water supply source that can deliver a minimum of 1.7 gpm (6.4 lpm) at the inlet ﬁtting. Dispensers set up to deliver 2.6 Oz./sec. (76.9 lpm) per dispense tip, require a water supply source that can deliver a minimum of 2.4 gpm (9.2 lpm) at the inlet ﬁtting. NOTE: Bunn-O-Matic recommends 3/8” tubing from the 1/2” water supply line. At least 18 inches of FDA approved ﬂexible beverage tubing, such as reinforced braided polyethylene or silicone, before the dispenser will facilitate movement to clean the counter top. 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.

This equipment must be installed to comply with the Basic Plumbing Code of the Building Ofﬁcials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). For models installed outside the U.S., you must comply with the applicable Plumbing/Sanitation Code for your area.

INITIAL SET-UP

NOTE: The LCC-2 (Chilled Unit) weighs approximately 80 lbs. (36.3 kg) and the LCA-2 (Ambient Unit) weighs

approximately 70 lbs. (31.8 kg). If necessary, use more than one person when lifting or moving the dispenser.

1. Locate and remove the information packets and tube kits from top of packaging and set aside.

2. Remove foam packing and cut around the bottom of box.

3. Remove the box and the rest of the foam packing.

4. Open the dispenser door and remove the drip tray and the lower splash guard panel.

5. Set dispenser on the counter where it is to be used. CAUTION: DO NOT LIFT ON THE DOOR.

6. Conﬁrm the dispenser is level on the counter.

ELECTRICAL HOOK-UP

CAUTION: Improper electrical installation will damage electronic components.

1. An electrician must provide electrical service as speciﬁed in conformance with all local, state and federal

electrical codes.

2. Using a voltmeter, check the voltage and color-coding of each conductor at the electrical source.

3. Connect the dispenser to the power source.

4. If plumbing is to be hooked up later, be sure the dispenser is disconnected from the power source. If plumbing

has been hooked up, the dispenser is ready for Initial Fill & Heat.

PLUMBING HOOK-UP

1. Flush the water line to remove any debris or foreign material.

2. Securely attach the water line to the 3/8” ﬂare ﬁtting, on bottom right side of the dispenser.

3. Turn on the water supply and check for leaks.

34766 010407

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.).

NOTE: The hot water FlowRate is ﬁxed at approximately 1.7 oz/sec. and can not be adjusted.

Removing the restrictors:

1. Disconnect the dispenser from the AC power source.

2. Open the Product Cabinet door.

3. Remove the concentrate tube, vent line and grommet from mix chamber ports in side the product cabinet.

4. Remove the two screws that fasten mix chamber to the control panel.

5. Gently pull mix chamber away from dispenser to expose water line connection, (you may have to rotate it slightly).

6. Disconnect FlavorGard™ sensor wire and hot water tubing from the mix chamber.

7. Remove the ﬂow restrictor from the inlet to the mix chamber.

8. Reconnect FlavorGard™ sensor wire and hot water tubing to the mix chamber.

9. Place mix chamber back into position in the dispenser, (you may have to rotate it slightly) and secure it with the two screws

10. Reposition the grommet, vent line and pump tubing onto the mix chamber ports.

Caution: Failure to properly replace and secure any of the above components may result leaks and/or cause damage to the dispenser.

If you changed the Dispenser Flow Rate, you will need to reprogram the dispenser to the new rate, see Programming

the Dispenser.

CAUTION: Failure to reprogram the Dispenser Flow Rates will result in inaccurate Mix Ratios.

Reprogramming the Dispenser Flow Rate:

1. Remove the lower splash guard panel and locate the Programming module.

2. Use the Down Arrow key to enter into the programming function and scroll through the menu’s to the “CAL LEFT SIDE?” menu and select “YES”.

3. Scroll down to the “CAL LF WTR VOL” menu

4. Use the (+) & (-) keys to enter a volume of 50 Oz. (1478 mL). This will recalibrate the Left dispenser to the new rate.

5. Scroll down to the “CAL RT WTR VOL” menu

6. Use the (+) & (-) keys to enter a volume of 50 Oz. (1478 mL). This will recalibrate the Right dispenser to the new rate.

7. Select “Exit” to leave the programming menu.

Note: The default volume of 50 Oz (1478 mL), is the typical Cal Volume for a 2.5 Oz/sec Flow Rate Test, see Field Calibration of the Concentrate Pumps / Dispenser Flow Rates.

34766 120105

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 the mix ratio of your concentrate, refer to the Tube Selection Chart.

TUBE SELECTION CHART Dispense Concentrate Ratios Rate 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

1.8 Oz/sec. 3/16” I.D. TUBING 1/8” I.D. TUBING (53 ml/sec.)

2.5 Oz/sec. 3/16” I.D. TUBING 1/8” I.D. TUBING (74 ml/sec.)

Examples:

1. For a Dispenser Flow Rate of 2.5 Oz./sec (74 mL/sec) and a Mix Ratio of 35:1 – use 3/16” I.D. Tubing.

2. 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.

Tube kits can be purchased from BUNN-O-MATIC. Part # 34727.1000 for 3/16” I.D. Tubing or #34728.1000 for 1/8” I.D. Tubing.

INSTALLING THE PUMP TUBING (Refer to the Tubing Installation Instructions in side the cabinet door for details.)

1. Loosen the thumbscrew securing the tubing retainer plate to the pump housing. Set it and the retainer plate aside.

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.

5. Close the compression band reinsert the tension screw into the notch in the pump housing.

6. Replace the tubing retainer plate and tighten the thumbscrew.

7. Reconnect bag connector to the product box.

8. Repeat steps 1 through 7 for the other pump.

9. Prime the pumps. Refer to Priming the Concentrate Lines section.

Thumbscrew

Tension Screw

Remove Retaining Plate Release Spring Tension Remove Tubing

Tension Screw

Tube Clamp

Install New Tubing Completed Installation

2.0”

Lubricate between arrows

Lubricate New Tube

2.0”

34766 112502

OPERATING CONTROLS AND INTERFACE

BUNN ICED COFFEE

AMBIENT UNIT

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 hot water from the center dispense tip. 3b. Push and Release switch for Portion Control Models.

4. Alternate Portion Control Switch: Momentarily pushed to select the Alternate Portion Control Volume #2.

5. Function Selector Switch: Allows the user to set the dispenser into different dispensing modes. a. Rinse: Dispenses hot water only- Flushes the mix chamber and dispense tip. b. Prime: Dispenses concentrates only – Primes the concentrate pump. c. Normal: Normal dispense mode - Dispenses mixed product (concentrate and water).

6. Mode Selector Switch: Allows the user to set the dispenser into different operating modes. a. Run: Normal operating position. b. Off: Turns off all functions including tank heater and chiller.

WARNING - The OFF Mode does not remove AC power from the dispenser. Disconnect power source before servicing the dispenser

c. Night: Anti-pilfering mode that disables dispensing, but keeps the tank heater and chiller (if applicable)

operational.

7. Door Interlock Switch: Unit will not dispense product if the door is open.

8. Power LED: Red - illuminates when AC power is applied to dispenser.

9. Ready LED: Green - illuminates when the water is at the preset ready temperature.

10. Portion LED: Yellow - illuminates when the portion dispense option has been selected, (5 second delay).

11. Rinse LED: Yellow - illuminates when the optional preset rinse alarm time has elapsed.

12. Left Reﬁll LED: Yellow - illuminates when the Left Concentrate BIB needs replaced.

13. Right Reﬁll LED: Yellow - illuminates when the Right Concentrate BIB needs replaced.

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)

5 6

34766 120105

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 stop ﬁlling when the tank is full. The dispenser will not begin heating the water until after the tank is ﬁlled. Dispenser models with product chillers will begin to cool the cabinet at this time.

4. The Green READY LED will illuminate when the tank temperature reaches the preset ready temperature. Note: The time required to heat the water initially will vary depending on the AC Power supplied to the dispenser.

While the tank is heating, the dispenser may be readied for use as described in Programming Functions & Basic

1 1

34766 112502

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™ in Programming the Dispenser).

The dispenser will automatically calibrate the system to all the factors that make up your particular mix proﬁle, (e.g. water source, ﬁltration system, Brand of concentrate and mix ratio selected, etc.). NOTE: It is very important that you have dispensed enough product to insure that the dispenser is fully functional and you are satisﬁed with the Flavor Proﬁle of the mix product before enabling FlavorGard™.

Once FlavorGard™ is enabled, the dispenser will continuously monitor the mix product as it is being dispensed and adjust the metering pump speed to maintain a consistent mixed product, thus eliminating factors such as (settling of the concentrate, tube wear, viscosity changes, liming, etc.).

The system is designed to work with in the range of variations that can be caused by these factors. The factory preset range is (+/- 10 %) and is adjustable to a Max of (+/- 15%). This insures that the FlavorGard™ system is not responding to factors that cannot be corrected by minor adjustments to the speed of the metering pump, (e.g. kinked hoses, low water pressure, severely worn tubes, empty BIB’s, etc). NOTE: Changes to Concentrate Ratios or Dispenser Flow Rates will automatically disable FlavorGard™. You will need to re-enable FlavorGard™, once you are satisﬁed with the new Flavor Proﬁle.

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. The dispenser will continue to serve product.

Warning w/ Brew Lockout Rinse LED will come on 4 hrs prior to the selected time interval and remain on

until the Rinse procedure has been performed. The dispenser will Lockout and not continue to serve product once the selected time interval has elapsed.

NOTE: The time interval between Rinses is adjustable from 8 to 24 hrs.

The dispenser is shipped with the automated Rinse Alarm disabled, (No Alarm). It is up to the user to determine the Rinse time interval and the level of warning required, based on their application and maintenance procedures. To enable the automated Rinse Alarm feature, refer to RINSE ALARM ? in Programming the Dispenser.

34766 050103

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 Right dispense tip. The Rinse LED will turn OFF, when the Rinse procedure has been satisﬁed for both sides.

5. Open the cabinet door and select Normal on the Function Selector switch – close the door.

1 5

BIB Empty Lockout Feature

The dispenser can be set to not dispense product when the concentrate BIB is empty. To enable this feature, ﬁrst calibrate the Empty BIB Threshold (refer to Field Calibrating the Empty BIB Warning). Then enable the BIB Empty Lockout feature (refer to the BIB Empty Lockout menu in Programming the Dispenser). The dispenser will now Lockout dispensing and ﬂash the Right or Left “REFILL LED” corresponding to the empty BIB. Once the BIB has been replaced, PRIME the concentrate line (refer to Priming the Concentrate Lines) and then dispense mixed product until the “REFILL LED” goes out. NOTE: If the dispenser fails to clear the BIB Empty Lockout, repeat the Priming operation a second time to insure the concentrate is ﬂowing properly.

Brew Temperature Lockout Feature

The dispenser can be set to not dispense product if the hot water is not up to the preset READY temperature. To enable this feature set the READY temperature to the minimum allowable dispense temperature. Then enable the Brew Lockout feature, refer to READY TEMP and BREW LOCKOUT, in Programming the Dispenser.

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