Bunn LCA-2 PC, LCA-2A, LCC-2 User Manual

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LCA-2

LCA-2A

LCA-2 PC

LCC-2

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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. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.

34766.0001A 01/13 ©2013 Bunn-O-Matic Corporation

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:

1)Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor.

2)All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:

a)Electronic circuit and/or control boards - parts and labor for 3 years.

b)Compressors on refrigeration equipment - 5 years parts and 1 year labor.

c)Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts and labor for 4 years or 40,000 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, non periodic cleaning and descaling, equipment failures related to poor water quality, damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but not limited to user replaceable parts such as seals and gaskets. 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.

392, A Partner You Can Count On, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic, Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design, Cool Froth, DBC, Dr. Brew stylized Dr. design, Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment Worldwide, Respect Earth, Respect Earth with the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com, Scale-Pro, Silver Series, Single, Smart Funnel, Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in Beverage Equipment Worldwide, ThermoFresh, Titan, trifecta, Velocity Brew, Air Brew, Air Infusion, Beverage Bar Creator, Beverage Profit Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer Control, Element, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Tea At Its Best, The Horizontal Red Line, Ultra are either trademarks or registered trademarks of Bunn-O-Matic Corporation. The commercial trifecta® brewer housing configuration is a trademark of Bunn-O-Matic Corporation.

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CONTENTS

Warranty...........................................................................

2

Introduction......................................................................

3

User Notices.....................................................................

4

Electrical Requirements....................................................

5

CE Requirements..............................................................

5

Plumbing Requirements...................................................

6

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

6

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

6

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

7

Installing the Drip Tray and Flip Down Cup Tray...............

7

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

8

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

9

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

10

Adjusting Mix Ratios......................................................

11

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

12

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

12

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

13

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

13

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

14

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

20

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

21

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

21

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

22

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

23

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

23

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

24

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

25

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

26

Troubleshooting..............................................................

27

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

32

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

33

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

33

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

34

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

35

INTRODUCTION

The Liquid Coffee Ambient Dispenser (LCA-2) and the Liquid Coffee Chilled Dispenser (LCC-2) delivers two types of coffee made from liquid concentrate 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. Follow the Concentrate Manufacturer’s Storage and Shelf Life recommendations. Product Flavor Profile is extended with chilled product storage cabinet featured in the LCC-2.

This dispenser is designed to operate when ambient temperatures are from 32°F (0°C) minimum to 104°F (40°C) maximum.

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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.

00986.0002

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.

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. For models installed outside the U.S.A., you must comply with the applicable Plumbing /Sanitation Code for your area.

00656.0001

Optional Field Wiring

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

120/208-240 V, 25.8 A, 6200 W 1PH, 3-Wire + GND, 60HZ

37881.0000

28181.0003

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11646.0002

 

 

 

 

REMINDER!

AIR FILTER

 

 

CLEAN AIR FILTER

CLEAN WEEKLY!

 

 

WEEKLY

(LOCATED UNDER THE DISPENSER)

 

 

(LOCATED UNDER THE DISPENSER)

FILTRO DE AIRE

 

 

RECORDATORIO!

00824.0001

LIMPIAR

LIMPIAR EL FILTRO DE

SEMANALMENTE!

 

 

 

 

AIRE SEMANALMENTE

(LOCALIZADO DEBAJO

DEL DISPENSADOR)

(LOCALIZADO DEBAJO

DEL DISPENSADOR)

40054.0000

00824.0002

WARNING CENTER LEG OF CUP TRAY MUST BE SUPPORTED BY THE DRIP TRAY!

47624.0000

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ELECTRICAL REQUIREMENTS

CAUTION: The dispenser must be 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

 

HEATER RED

 

HEATER RED

10A. FUSE - WHITE

HEATER RED

 

 

10A. FUSE - WHITE

 

208 or

10A. FUSE - WHITE

120V A.C. 208 or

 

120V A.C.

240V A.C.

 

240V A.C.

10A. FUSE - BLACK

10A. FUSE - BLACK

10A. FUSE - BLACK

120V A.C.

 

 

LIMIT SW. - BLACK

Fig. 1

LIMIT SW. - BLACK

Fig. 2

LIMIT SW. - BLACK

Fig. 3

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.

FIELD WIRING TERMINAL BLOCK DIAGRAM

Models with Master ON/OFF Switch

RED

 

RED

 

RED

 

 

TO MASTER

120V A.C.

TO MASTER

208 or

TO MASTER

120V A.C.

208 or

ON/OFF

ON/OFF

ON/OFF

 

240V A.C.

240V A.C.

SWITCH

 

SWITCH

 

SWITCH

120V A.C.

 

BLACK

 

BLACK

 

BLACK

 

 

 

Fig. 1

 

Fig. 2

 

Fig. 3

 

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.

The LCA-2A dispenser is internally wired from the factory for 230 Volts AC Single Phase 50/60 Hz. It requires a 2-wire, grounded, individual branch circuit rated for 230 Volts AC.

L2 RED

230V, 230A.Cor.

L1 BLACK

240V A.C.

CE REQUIREMENTS

This appliance must be installed in locations where it can be overseen by trained personnel.

For proper operation, this appliance must be installed where the temperature is between 5°C to 35°C.

Appliance shall not be tilted more than 10° for safe operation.

An electrician must provide electrical service as specified in conformance with all local and national codes.

This appliance must not be cleaned by water jet.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given instructions concerning use of this appliance by a person responsible for its safety.

Children should be supervised to ensure they do not play with the appliance.

• If the power cord is ever damaged, it must be replaced by the manufacturer or authorized service personnel with a special cord available from the manufacturer or its authorized service personnel in order to avoid a hazard.

• Machine must not be immersed for cleaning.

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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.

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. For models installed outside the U.S.A., you must comply with the applicable Plumbing /Sanitation Code for your area.

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.

NOTE: Water pipe connections and fixtures directly connected to a potable water supply shall be sized, installed, and maintained in accordance with federal, state, and local codes.

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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.

INSTALLING THE DRIP TRAY AND FLIP DOWN CUP TRAY

Place the SST Cover in the recessed area of the Drip Pan.

Slide the Drip Pan under the front of the LCA-2 and align the tabs with the legs.

Insert the hinge pins of the Cup Tray into the notched bracket on the splash panel and rotate the Tray into place.

The Cup Tray should be down for serving individual cups of coffee.

The Cup Tray can be flipped up out of the way for filling carafe’s and/or airpots.

WARNING: The center leg of Cup Tray must be supported by the Drip Tray during use. Do not use the Cup Tray if the Dispenser legs have been extended and/or the Drip Tray has been removed. Failure to support the Cup Tray during use can cause damage to the Cup Tray and/or spillage of HOT Liquids.

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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 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 onlyFlushes 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

1

4

BUNN ICED COFFEE

AMBIENT UNIT

8

7 9

10

11

12

15 13 14

2

3

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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

 

 

 

 

2.0”

 

 

 

 

 

2.0”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screw

 

Lubricate between arrows

 

 

Remove Retaining Plate Release Spring Tension

Remove Tubing

 

 

Lubricate New Tube

Tension Screw

 

Tube Clamp

 

Install New Tubing

Completed Installation

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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.

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ADJUSTING MIX RATIOS

The dispenser comes with the Mix Ratios preset to 35:1. The Left and Right ratios can be set for any ratios between 20:1 and 100:1, (refer the concentrate package or the supplier for the recommended ratio). Once the recommended ratio has been entered, the Ratios can be adjusted to suit local taste preferences (i.e. lighter or darker).

Procedure for Adjusting the Mix Ratio to Taste:

1)Set the left and right dispense ratios to the recommended ratios for the concentrate to be used - refer to “PROGRAMMING THE DISPENSER” section in this manual.

2)Load the concentrate in the cabinet – refer to “LOADING THE CONCENTRATE” section in this manual.

3)Allow the dispenser to fill with water and heat up to the Ready temp – refer to “INITIAL FILL AND HEAT” section in this manual.

4)Prime both pumps – refer to “PRIMING THE CONCENTRATE LINES” section in this manual.

5)Dispense Product (left and right) for approx. 30 sec and discard. This will finish priming the lines and allow the pumps time to adjust to the target RPM.

6)Dispense one full cup of coffee (8 oz minimum) from both sides and evaluate.

a)If the coffee is too weak – Decrease the Mix Ratio slightly.

b)If the coffee is too strong – Increase the Mix Ratio slightly.

7)Repeat steps 5 and 6 until the desired taste profile is achieved

Note: Bunn does not recommend adjusting the Mix Ratio more than 20% from the recommended ratio. Contact your product supplier or service agent, if more than a 20 % adjustment is indicated, as there may be an error with the set up of the dispenser.

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