Bunn LCC-2 LP User Manual

LCC-2 LP

BUNN CHILLED

INSTALLATION & OPERATING MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: [phone] FAX: [phone]

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.

39288.0000A 09/06 ©2006 Bunn-O-Matic Corporation

www.bunnomatic.com

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 [phone] 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.

BUNN, LCC-2 LP and BUNNLink are either trademarks or registered trademarks of Bunn-O-Matic Corporation.

39288 083106

	CONTENTS
Warranty..................................................................................................................................................	2
User Notices............................................................................................................................................	4
Introduction.............................................................................................................................................	5
Electrical Requirements...........................................................................................................................	5
Plumbing Requirements..........................................................................................................................	5
Initial Set-up............................................................................................................................................	6
Electrical Hook-up...................................................................................................................................	6
Plumbing Hook-up..................................................................................................................................	6
Operating Controls & Interface................................................................................................................	7
Installing Pump Tubing............................................................................................................................	9
Initial Fill & Heat....................................................................................................................................	10
Rinse Alarm Feature..............................................................................................................................	11
Programming the Dispenser..................................................................................................................	12
Priming the Concentrate Lines...............................................................................................................	16
Draining the Hot Water..........................................................................................................................	16
Operating the Dispenser........................................................................................................................	17
Cleaning & Preventive Maintenance.......................................................................................................	18
Replacing the Pump Tubing...................................................................................................................	19
Calibrating the Dispenser.......................................................................................................................	20
Troubleshooting Guide...........................................................................................................................	22
Field Calibration of the Concentrate Pumps...........................................................................................	24
Dispenser Flow Rate Calibration............................................................................................................	24
Field Calibrating the Empty Product Warning.	.......................................................................................25
Schematic Wiring Diagrams..................................................................................................................	26

39288 083106

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

00656.0000

11646.0002

INTRODUCTION

The LCC-2 LP BUNN Low Profile dispenser 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.

ELECTRICAL REQUIREMENTS

Refer to Data Plate on dispenser, and local/national electrical codes to determine circuit requirements. WARNING - If the power cord is ever damaged, it must be replaced by the manufacturer or its service agent with a special cord available from the manufacturer or its service agent in order to avoid a hazard.

The 120V version of the LCC-2 LP dispenser is 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.

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 3/8” 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 1/4” flare. Dispensers set up to deliver to 47.3 ml/sec (1.6 Oz./sec.) and require a water supply source that can deliver a minimum of 1.7 gpm (6.4 lpm) at the inlet fitting.

NOTE: Bunn-O-Matic recommends 1/4” tubing from the 3/8” 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.A., you must comply with the applicable Plumbing/Sanitation Code for your area.

BUNN recommends the use of our Easy Clear® Water Quality Systems to assure perfect taste.

Filter Kit - Easy Clear EQ-11-TL Bunn-O-Matic part no. 30344.1001

39288 083106

INITIAL SET-UP

NOTE: The LCC-2 LP weighs approximately 70 lbs. (32 kg). If necessary, use more than one person when lifting or moving the dispenser.

1.Cut the plastic bands and remove the top box.

2.Locate and remove the parts box from top of packaging and set aside.

3.Remove foam packing.

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

5.Open the parts box remove the drip tray, brackets and splash guard.

6.Install the drip tray assembly.

a.Loosen the front two legs several turns.

b.Slide the drip tray brackets between the large washers and the base plate.

c.Retighten the two front legs securing the bracket.

d.Install the drip tray.

7.Install the splash guard panel.

a.Insert the top tabs into the slots on the door panel.

b.Align the key hole slots over the two lower screws, then slide the splash guard down.

c.Tighten the two lower screws.

8.Level the dispenser using the adjustable feet on the legs.

PLUMBING HOOK-UP

1.Securely attach the short piece of tubing and the water strainer assembly to the inlet fitting on the bottom of the dispenser.

2.Flush the water line to remove any debris or foreign material, and securely attach it to the flare fitting on the water strainer assembly.

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

ELECTRICAL HOOK-UP

CAUTION: Improper electrical installation will damage electronic components.

Refer to Data Plate on the dispenser, and local/national electrical codes to determine circuit requirements.

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.

39288 083106

OPERATING CONTROLS AND INTERFACE

Refer to the photos on the following page for the location of these features.

1.Dispense Switches: Push to dispense product.

2.Stop Switch: Momentary switch stops all dispense functions.

3.Hot Water Switch: Push and Hold switch to dispense hot water from the center dispense tip.

4.Carafe Switch: Momentarily pushed to select the Carafe dispense Volume.

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

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

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

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

9.Left Refill LED: Yellow - illuminates when the Left Concentrate Can needs replaced.

10.Right Refill LED: Yellow - illuminates when the Right Concentrate Can needs replaced.

11.Function Selector Switch: Allows the user to select different dispensing functions. (Located behind the splash guard panel)

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).

12.Mode Selector Switch: Allows the user to select different operating modes.

a.Run: Normal operating position.

b.Night: Anti-pilfering mode that disables dispensing, but keeps heater and chiller operational. WARNING - The NIGHT Mode does not remove AC power from the dispenser. Disconnect power source before servicing the dispenser.

c.Program: Enables programming and set up of the dispenser.

13.Programming Switches: Used in conjunction with the LED display to program and calibrate the dispenser to customer specific requirements.

a.MENU: used to scroll to the next menu screen.

b.(+): used to increase the displayed value.

c.(-): used to decrease the displayed value.

14.LED Display: Displays programming menus and fault messages.

(Continued Next Page)

39288 083106

7

8

5

6

9

10

2

4

1

3

14

11

12

13

39288 083106

INSTALLING PUMP TUBING

INSTALLING THE PUMP TUBING

Refer to the Tube Replacement Instruction inside the Cabinet door.

1.Loosen the thumbscrew securing the tubing retainer plate to the pump body and set 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 no. M2531.0001) to the middle section of the new pump tubing.

4.Carefully wrap the new tubing around the rotor, making sure that the elbow and clamps end up on the front side of the pump body.

5.Depress the tension screw and insert it in the notch in the pump body, reapplying spring tension on the pump band.

6.Install the free end of the tube over the inlet port of the mix chamber on that side of the cabinet.

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

8.Attach the BIB adapter to the tubing and connect to the opened product container.

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

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

Note: Replacement Tube Kits can be purchased from BUNN-O-MATIC.

	Retaining	Thumbscrew	Tension
	Plate		Screw

2.0”

2.0”

Lubricate between arrows

Remove Retaining Plate

Release Spring Tension

Remove Tubing

Lubricate New Tube

Inlet Port

Elbow &

Clamps

Install New Tubing

Completed Installation

39288 083106

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.

3 4

1

10	39288 083106

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 two levels of operation, Disabled and Warning.

Alarm Level Selected	Alarm Mode
Disabled	None
Warning	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.

NOTE: The time interval between Rinses is adjustable from 0 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.

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.

NOTE: 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.

5 1

11	39288 083106

PROGRAMMING THE DISPENSER

Open the dispenser door to access the digital programming module with LED display. Two basic modes are available to the operator: Display Mode and Program Mode.

To enter the Display Mode, Set the RUN/NIGHT/PROGRAM Switch to the RUN position.

To enter the Program Mode, Set the RUN/NIGHT/PROGRAM Switch to the PROGRAM position.

Display Mode: Used to view the current set-up values. Use the MENU switch to scroll to the next display. NOTE: The display blanks out after two minutes of inactivity. Press any button to activate the display.

LCD DISPLAY

1 8 0

MENU (-) (+)

0 1 1 8 0

MENU	(-)	(+)
0 2		3 8
MENU	(-)	(+)
0 3		3 8
MENU	(-)	(+)
0 4		0.0
MENU	(-)	(+)
0 5		0.0

DISPLAY MODE	DESCRIPTION
Home View	Alternates between Tank Temperature
	and Cabinet Temperature.

Tank Temperature

Displays Target Tank Temperature (F°)

Regular Dispense Ratio

Displays Left Dispense Ratio (XXX:1)

Decaf Dispense Ratio

Displays Right Dispense Ratio (XXX:1)

Cup Dispense Volume	Displays Cup Dispense Volume (XX.X
	Oz.). Set to 0.0 for “Push and Hold”
	Dispensing.

Carafe Dispense Volume	Displays Carafe Dispense Volume
	(XX.X Oz.)

MENU

(-)

(+)

12	39288 083106

PROGRAMMING THE DISPENSER (Cont.)

Display Mode (Continued)

	LCD DISPLAY						DISPLAY MODE	DESCRIPTION
0	6			0	0.0		Regular Dispense Total	DisplaysTotalRegularCoffeeDispensed
								(XX.X Gal)
MENU		(-)				(+)
0	7			0	0.0		Decaf Dispense Total	Displays Total Decaf Coffee Dispensed
								(XX.X Gal)
MENU		(-)				(+)
0	8			6	0	0	Empty Product Threshold	Displays Empty Product Threshold
								(Default = 600)
MENU		(-)				(+)
0	9			O	F	F	Rinse Alarm (Hrs)	Displays The Hours Between Required
								Rinses.
								(Default = OFF, Alarm Disabled)
MENU		(-)				(+)

L Cx x

Displays Software Version # -

Exits To Home View After 3 Seconds.

MENU

(-)

(+)

13	39288 083106

PROGRAMMING THE DISPENSER (Cont.)

Program Mode: Used to change or enter new set-up values.

To enter the Program Mode, Set the RUN/NIGHT/PROGRAM Switch to the PROGRAM position, the unit will display “__PPP” to indicate it is in the Program Mode. Use the MENU switch to scroll to the next display. Use the Increase (+) and Decrease (-) switch to adjust the values.

LCD DISPLAY

P 11 8 0

MENU	(-)	(+)
P 2		3 8
MENU	(-)	(+)
P 3		3 8
MENU	(-)	(+)
P 4		0.0
MENU	(-)	(+)
P 5		0.0
MENU	(-)	(+)
P 6		0.0

PROGRAM MODE	DESCRIPTION
Tank Temperature	Default = 180°F (82°C)
	Range = 120° - 200°F (49 - 93°C)
	Ready Temp = Tank Temp minus 10°F
	(~5.5°C)
Left (Regular) Dispense Ratio	Set Regular Coffee Mix Ratio
	Default = 38:1
	Range = 25 Max / 100 Min
Right (Decaf) Dispense Ratio	Set Decaf Coffee Mix Ratio
	Default = 38:1
	Range = 25 Max / 100 Min
Cup Dispense Volume	Set Cup Dispense Volume
	Default = 0.0, Push & Hold
	Range = 0.0 / 16.0 Oz.
	(0.0 / 0.5 L)
Carafe Dispense Volume	Set Carafe Dispense Volume
	Default = 0.0, Disabled
	Range = 0.0 / 64.0 Oz.
	(0.0 /2.0 L)
Left (Regular) Dispense Total	Reset Total to Zero (00.0 Gal)
	(0.00 Liters)

MENU

(-)

(+)

14	39288 083106

PROGRAMMING THE DISPENSER (Cont.)

Program Mode (Continued)

		LCD DISPLAY						PROGRAM MODE	DESCRIPTION
	P	7				0.0		Right (Decaf) Dispense Total	Reset Total to Zero (00.0 Gal)
									(0.00 Liters)
	MENU		(-)				(+)
	P	8			6	0	0	Empty Product Threshold	Set Conductance Threshold
									Default = 600
									Range = 100 Min / 900 Max
									To check Conductance of Hot Water,
	MENU		(-)				(+)		view the display while rinsing. Set value
									to 100 above reading.
	P	9			O	F	F	Rinse Alarm Timer	Default = OFF > Rinse Alarm Disabled
									Range = 1 - 24 hrs
									Reminder Only. No Lock Out.
									To clear alarm, set to RINSE Mode.
	MENU		(-)				(+)		Press Left switch, then Right switch
									for 15 seconds each.

L C0 x x

Displays Software Version # -

Exits To Home View After 3 Seconds.

MENU

(-)

(+)

15	39288 083106

PRIMING THE CONCENTRATE LINES

1.Open the dispenser door.

2.Select Prime on the Function Selector Switch and Run on the Mode Selector Switch.

3.Close the dispenser door.

4.Place a container under the dispense tip.

5.Activate the appropriate dispenser until concentrate flows from the dispense nozzle. Priming may take 5 to 10 seconds.

6.Open the dispenser door, select Normal on the Function Selector Switch.

Note: Concentrate may continue to drip out of dispense tip. The user may wish to Rinse (refer to Rinsing) the dispenser to clean out the remaining concentrate.

2 6

2

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 right side access panel.

4.Pull out drain tube to empty into a sink or a container with a minimum of 200 ounce (5.9L) capacity.

5.Make sure drain clamp is closed, then remove drain plug.

6.Direct the drain tube into sink or container and open drain clamp. Continue draining tank until ALL of the water is out. Be careful when draining the water as it may be very hot.

7.Close drain clamp, insert drain plug, place drain tube back into machine, and replace the right side access

panel.

Note: The dispenser must be refilled using the Initial Fill & Heat steps before reconnecting the power source.

16	39288 083106

OPERATING THE DISPENSER

Set the Function Selector Switch to “Normal” and the Mode Selector Switch to “Run.”

1A. Push and Hold Dispense Mode (Cup at a time). See Programming Functions to set this amount.

a.Place cup on the tray beneath the dispensing tip.

b.Push and hold the corresponding dispense switch until the container is full.

c.Remove cup or container.

1B. Portion Dispense Mode. (Cup dispense volume preset to a desired amount) Refer to Programming Functions to set this amount.

a.Place cup on the tray beneath the dispensing tip.

b.Momentarily press the desired dispense switch. The dispenser will automatically dispense the beverage at the preset amount. Allow the mix chamber to drain at the end of the cycle.

c.Remove cup.

2.Carafe Dispense Mode. Refer to Programming Functions to set this volume.

a.Place the appropriate size container beneath the dispensing tip.

b.Momentarily press the Portion Switch. The Portion LED will illuminate for 5 seconds after the Portion Switch is pressed.

c.Momentarily press the desired dispense switch. If the user waits longer than 5 seconds to push the switch, the dispenser will default back to the cup dispense mode. The carafe dispense mode can be disabled at any time during the dispense by either momentarily pushing the Dispense Switch again or pressing the Stop button.

d.Wait for the container to fill and the dispenser to quit dispensing, then remove the container.

3.Hot Water Dispense

a.Place a container under the dispense tip.

b.Push and hold the Hot Water switch until water reaches the desired level, then release.

c.Remove the container.

17	39288 083106

CLEANING & PREVENTATIVE MAINTENANCE

General Cleaning and Sanitizing Procedures

Note: The BUNN® LCC-2 LP dispenser incorporates a “user selectable” rinse reminder feature, which lights the Rinse LED on the front panel when it is time to rinse. See Programming Functions to activate this feature.

Daily: RINSING

1.Open the dispenser door and set the Function Switch to Rinse and the Mode Selector Switch to RUN.

2.Close the dispenser door and place a 1/2 gal (2 liter) container under the dispense nozzle area.

3.Activate both dispense switches until the water is clear or has no concentrate coloring in it, (10 to 20 sec.).

4.Open the dispenser door, set the Function Switch back to Normal.

Note: To clear the “Rinse” warning, activate both dispense switches (one at a time) until the flow stops automatically (approximately 20 sec. for each tip). The “Rinse” LED will turn off when the Rinse time has been satisfied.

Daily: PARTS WASHING

1.Remove and wash the drip tray and drip tray cover in a mild detergent solution. Rinse thoroughly.

2.Wipe the splash panel, dispense nozzles, door, and cabinet with a clean damp cloth.

Weekly: SANITIZING

1.Open dispenser door and select Prime on the Function Selector Switch and Run on the Mode Selector Switch.

2.Remove bag connector from the product box and disassemble or prop open the internal valve to allow free flow of product through the connector.

Note: Cutting the mating fittings from an empty bag makes an excellent “free flowing” connector for this purpose.

3.Place bag connector into a one gallon (3.8 liter) container of warm soapy tap water 140F (60C).

4.Place an empty container under dispense tip and activate corresponding Dispense Switch until clean soapy water is dispensed from the dispense tip.

5.Repeat steps 3 and 4 with warm tap water 140F (60C) to rinse the soapy water from the pump tubing. Continue activating Dispense Switch until water is clear, and no soapy water is being dispensed.

6.Prepare 2.5 gallons (9.5L) of sanitizing solution by dissolving 1 packet of Kay 5 sanitizer into 2.5 gallons (9.5L) of 120F (48.9C) water to ensure 100 ppm of available chlorine.

7.Repeat steps 3 and 4 with the sanitizing solution. Once sanitizing solution is being dispensed, release handle and allow solution to sit for 5 minutes.

8.Repeat step 5 with warm tap water to flush sanitizing solution out of the pump tubing.

9.Remove mating connector from the bag connector.

10.Reattach bag connector to product box.

11.Select Normal on Function Selector Switch and Run on Mode Selector Switch.

12.Actuate Dispense Switch until concentrate/water mixture appears. Continue to dispense at least 12 oz. (355 ml) of concentrate/water mixture and discard.

13.Repeat steps 1 through 12 for other dispense head.

Air Filter Cleaning

Monthly cleaning of the air filter is recommended. Severe conditions may require more frequent cleaning.

18	39288 083106

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 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.

Refer to the Tube Replacement Instruction inside the Cabinet door.

Note: To avoid concentrate spills, rinse the pump tubing with warm tap water prior to removing the tubes, (Refer to steps 1 - 4 of the Weekly Sanitizing instructions).

1.Loosen the thumbscrew (Fig 1) securing the tubing retainer plate to the pump body and set 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 (Fig 2).

3.Gently pull the pump tube from around the pump rotor (Fig 3).

4.Inspect the pump bands, rollers and housing for contamination or signs of wear. Clean or replace worn parts if necessary.

5.Apply lubricant (BUNN-O-MATIC part no. M2531.0001) to the middle section of the new pump tubing (Fig 4).

6.Carefully wrap the new tubing around the rotor, making sure that the elbow and clamps end up on the front side of the pump body (Fig 5).

7.Depress the tension screw and insert it in the notch in the pump body, reapplying spring tension on the pump band.

8.Install the free end of the tube over the inlet port of the mix chamber on that side of the cabinet (Fig. 5).

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

10.Attach the BIB adapter to the tubing and connect to the opened product container (Fig 6).

11.Repeat steps 1 through 10 for the other pump.

Note: Replacement Tube Kits can be purchased from BUNN-O-MATIC.

Fig 1	Fig 2	Fig 3	Fig 4
Retaining	Thumbscrew	Tension
Plate		Screw

2.0”

2.0”

Lubricate between arrows

Remove Retaining Plate

Release Spring Tension

Remove Tubing

Lubricate New Tube

Fig 5	Fig 6
Inlet Port
Elbow &
Clamps

Install New Tubing

Completed Installation

19	39288 083106

CALIBRATING THE DISPENSER

NOTE: The LCA-2 LP is calibrated at the factory and does not normally need to be re-calibrated. To enter the Calibration Mode, Set the RUN/NIGHT/PROGRAM Switch to the PROGRAM position and then hold the “MENU” switch down for 10 seconds.

	LCD DISPLAY					CALIBRATION MODE	DESCRIPTION
C	1		r	u	n	Left (Regular) Pump Cal.	Set PRIME-NORMAL-RINSE switch
							to PRIME position. Press and hold
							Regular Dispense Switch until pump
							stops(20sec.)Referto Field Calibration
MENU		(-)			(+)		of the Concentrate Pumps.
C	1			2	2	Left (Regular) Pump Cal.	Enter mL collected from the 20 sec.
							test above.
							Default = 22
							Range = 18 - 26mL
MENU		(-)			(+)
C	2		r	u	n	Right (Decaf) Pump Cal.	Set PRIME-NORMAL-RINSE switch to
							PRIME position. Press and hold Decaf
							Dispense Switch until pump stops (20
							sec.) Refer to Field Calibration of the
MENU		(-)			(+)		Concentrate Pumps.
C	2			2	2	Right (Decaf) Pump Cal.	Enter mL collected from the 20 sec.
							test above.
							Default = 22
							Range = 18 - 26mL
MENU		(-)			(+)
C	3		r	u	n	Left (Regular) Water Rate	Set PRIME-NORMAL-RINSE switch to
							RINSEposition.PressandholdRegular
							Dispense Switch until flow stops (20
							sec.) Refer to Field Calibration of the
MENU		(-)			(+)		Concentrate Pumps.
C	3		1.	0	8	Left (Regular) Water Rate	Enter Liters collected from the 20 sec.
							test above.
							Default = 1.08
							Range = 0.95 - 1.120 Liters
MENU		(-)			(+)

20	39288 083106

CALIBRATING THE DISPENSER (Cont.)

LCD DISPLAY			CALIBRATION MODE	DESCRIPTION
C 4 r u n			Right (Decaf) Water Rate	Set PRIME-NORMAL-RINSE switch to
				RINSE position. Press and hold Decaf
				Dispense Switch until flow stops (20
				sec.) Refer to Field Calibration of the
MENU	(-)	(+)		Concentrate Pumps.
C 4 1. 0 8			Right (Decaf) Water Rate	Enter Liters collected from the 20 sec.
				test above.
				Default = 1.08
				Range = 0.95 - 1.20 Liters
MENU	(-)	(+)
C 5 0 6 5			Cooler Control Temperature	Used to set the Target Temperature for
				the Product Cabinet.
				Default = 65°F (18°C)
				Range = 55° - 75°F (13° - 24°C)
MENU	(-)	(+)
			Pump “OFF” Delay	Delays the Pump turn off after a
				dispense.
				Default = 200
				Range = 1 - 999 mSec.

C 7 E n g

MENU (-) (+)

C 8 E x x

MENU	(-)	(+)
C 9	-	- -
MENU	(-)	(+)
LC		x x
MENU	(-)	(+)

English or Metric Mode	Used to select the desired units.
	Default = English
	Eng for English
	S.I. for Metric
Error Code Memory	Display cycles through the last (3)
	Error Codes.
	Erase by holding both the Decrease (-)
	& Increase (+) switches for 10 sec.
Reset Factory Defaults	Resets all set up values to the Factory
	Default setting.
	Hold both Increase (+) and Decrease
	(-) switch for 10 seconds.
	Displays Software Version # -
	Exits To Home View After 3 Seconds.
21	39288 083106

TROUBLESHOOTING GUIDE

Error Codes

When an error has occurred, all Door LED’s will be flashing. Open the Door to access the LED Display and record the Error Code. Refer to the list of Error Codes below to identify the problem. 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.

		LED DISPLAY					ERROR	DESCRIPTION/TROUBLESHOOTING
	E	C		0	0	1	Left (Regular) Pump Failed	Left Motor or RPM Sensor Failure.
								Check motor and RPM sensor wires
								for shorts or open connections.
	MENU		(-)
						(+)
	E	C		0	0	2	Right (Decaf) Pump Failed	Right Motor or RPM Sensor Failure.
								Check motor and RPM sensor wires
								for shorts or open connections.
	MENU		(-)			(+)
	E	C		0	0	3	Heating Time Too Long	Tank Heater ON Continuous For More
								Than 1 Hour. Check heater wires for
								open connections.
	MENU		(-)			(+)
	E	C		0	0	4	Fill Time Too Long	Fill Valve ON Continuous For More Than
								15 Minutes. Water turned OFF. Refill
								Valve disconnected. Faulty Valve.
	MENU		(-)			(+)
	E	C		0	0	5	Cool Time Too Long	Cool Temp Sensor Above 75°F (24°C)
								For More Than 4 Hours. Cabinet Door
								open or faulty seal. Check T.E. Unit
								wires for shorts or open connections.
	MENU		(-)			(+)		Air Filter plugged or blocked. Ambient
								Temperature too high. >90°F (32°C)
	E	C		0	0	6	Heat Sink Temp Too High	Heat Sink Temp Higher Than 190°F
								(88°C). Air Filter plugged or blocked.
								Ambient Temperature too high. >90°F
								(32°C)
	MENU		(-)			(+)

22	39288 083106

TROUBLESHOOTING GUIDE (Cont.)

Error Codes (Continued)

LED DISPLAY

ERROR

DESCRIPTION/TROUBLESHOOTING

E

C

0

0

7

Tank Temp Sensor Failed

Sensor Reading Out Of Range (High

or Low). Faulty Sensor wiring.

MENU

(-)

(+)

E

C

0

0

8

Cool Temp Sensor Failed

Sensor Reading Out Of Range (High

or Low). Faulty Sensor wiring.

MENU

(-)

(+)

E

C

0

0

9

Heat Sink Temp Sensor Failed

Sensor Reading Out Of Range (High

or Low). Faulty Sensor wiring.

MENU

(-)

(+)

E

C

0

1

0

Switch Board Failure

Unable To Communicate With The

Switch Board In The Door. Faulty

wiring between the Door and the Main

Control Board.

MENU

(-)

(+)

E

C

0

1

1

Power Supply Failure

Power Supply voltage is outside the

allowable limits (23 - 26 Vdc). Faulty

wiring. Blown fuse inside Power

Supply, failed supply.

MENU

(-)

(+)

23	39288 083106

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. 1500 to 2000 ml graduated container.

NOTE: You can calibrate either the Concentrate Pump or the Dispenser Flow Rate independently. Simply scroll through the menu screen to the desired section and perform only those steps. (refer to Calibrating the Dispenser)

Calibrating the Concentrate Pumps.

Regular Coffee - Left Concentrate Pump Calibration

1.Open the door of the dispenser and select PROGRAM on the Mode Selector Switch.

2.Depress and Hold the MENU switch for approximately 10 sec. The unit will display “C1 run” when it has entered the Calibration Mode.

3.Select PRIME on the Function Selector Switch.

4.Place a container under the left Dispense Tip and depress the Regular dispense switch until a steady stream of concentrate comes out the tip (5 to 10 seconds).

5.Stop priming and allow the tip to stop dripping. Discard the concentrate collected.

6.Place a 50 ml graduated cylinder under the Left Dispense Tip.

7.Press & Hold the Regular dispense switch. The dispenser will display a 20 second count down timer and then shut the pump OFF automatically. Release the dispense switch.

8.Keep the graduated cylinder under dispense tip until all the concentrate has dripped out.

9.Measure the volume of concentrate collected in the graduated cylinder.

The acceptable range for the volume of concentrate collected is 18 - 26 ml

10.If the amount collected is not within the acceptable range, empty the graduated cylinder and repeat STEPS 6 – 9.

11.If the amount collected is still not within range, replace the pump tubing with a new Tube Kit, (refer to the Tube Replacement Instructions).

12.When satisfied with the volume of concentrate collected, press the MENU switch. The current Calibration volume “C1 XX” will be displayed.

13.Use the (-) / (+) keys to adjust number displayed to the amount measured in STEP 9.

Decaffeinated Coffee - Right Concentrate Pump Calibration

Depress the MENU switch to display the Decaffeinated Concentrate Pump calibration menu “C2 run”. Repeat STEPS 3 – 13 above for the right side “Decaf” pump.

Calibrating the Dispenser Flow Rates.

Regular Coffee - Left Dispenser Flow Rate Calibration

1.Select RINSE on the Function Selector Switch.

2.Press the MENU switch to display the Regular Coffee Flow Rate calibration menu “C3 run”

3.Place a container under Left Dispense Tip and depress the Regular dispense switch until a steady stream of water comes out the tip (5 to 10 seconds).

4.Stop dispensing and allow the tip to stop dripping. Discard the water collected

(Continued Next Page)

24	39288 083106

Field Calibration of the Concentrate Pumps & Dispenser Flow Rates

(Continued)

5.Place a 1500 to 2000 ml graduated container under Left Dispense Tip.

6.Press & Hold the Regular dispense switch. The dispenser will display a 20 second count down timer and then stop dispensing automatically. Release the dispense switch.

7.Keep the graduated container under dispense tip until all the water stops dripping.

8.Measure the volume of water collected in the graduated container.

The acceptable range for the volume of water collected is .95 - 1.20 liters

9.If the amount of water collected is not within the acceptable range, empty the graduated container and repeat STEPS 5 – 8.

10.If the amount collected is still not within range, inspect the dispense valves, tubing and mix chamber for lime, kinks or other obstructions.

11.When satisfied with the volume of water collected, press the MENU switch. The current Water Calibration volume “C3 XX” will be displayed.

12.Use the (-) / (+) keys to adjust number displayed to the amount measured in STEP 8.

Decaffeinated Coffee - Right Dispenser Flow Rate Calibration

Depress the MENU switch to display the Decaffeinated Coffee Flow Rate calibration menu “C4 run”. Repeat STEPS 3 – 12 above for the right side “Decaf” pump.

Field Calibrating the Empty Product Warning

The dispenser will automatically turn on the Regular or Decaf “REFILL LED”, see Operating Controls and Interface, when the corresponding container is Empty. The Refill message is triggered when the conductance sensor reading drops below the minimum setting. The factory set minimum is 600 and should be correct for most locations. However, in some areas the hardness of the local water supply may effect this reading. If the Refill message doesn’t come on when the container is empty or the message comes on too early and there is still concentrate left in the container, use the following procedure to find the correct Empty Product Threshold.

Calibrating The Empty Product Threshold

1.Open the dispenser door to access the digital programming module with LED display and set the Function Switch to the “Rinse” position. Leave the door open to view the LED display.

2.Place a large container under the dispenser tip, then activate and hold the Regular Coffee dispense switch.

3.Hold the dispense switch long enough to rinse all the concentrate out of the mix chamber and for the Conductance reading to stabilize and stop dropping.

4.Record the nominal Conductance value displayed. (NOTE: It is typical for this value to fluctuate (+/- 25) points about the nominal value.) This is the conductance reading of the water in your area.

5.Repeat steps 2, 3 & 4 for the Decaf Coffee dispenser.

6.Add 100 points to the larger of the Regular or Decaf conductance value. This is the new Empty Product threshold value for your dispenser.

7.Enter this new value into the Empty Product Alarm threshold position “P8 XXX”, see Programming the Dispenser.

25	39288 083106

L1

	LIMIT THERM.
BLK-16	BLK-16

LEFT VALVE

SOL

RIGHT VALVE

SOL

HOT WATER

SOL

INLET VALVE

SOL

WHT/BLK-18

		1
		RED	WHT/BLU-22
LEFT PUMP		BLK	WHT/BLK-22
RPM SENSOR		GRN	TAN-22
LEFT		BRN/BLK-18
	M	BRN/WHT-18
PUMP
		1
		RED	WHT/BLU-22
RIGHT PUMP		BLK	WHT/BLK-22
RPM SENSOR		GRN	RED-22
RIGHT		WHT/RED-18
	M	RED/BLK-18
PUMP

J2-1

SWITCH & LED

BOARD

J2-4

LCC-2 LP BUNN CHILLED

GRN

N

	TANK HEATER
BLU/BLK-16	120 V 1425 W	WHT-16

N.O.

COM

J4-1

BRN/BLK-18

RED-18

ORN-18

YEL-18

J4-5

WHT/BLK-18

WHT-18

BLK-18 J4-10

MAIN

CONTROL

BOARD

J6-1

BRN/BLK-18

WHT/BLU-22

TAN-22 J6-5

WHT/BLU-22

RED/BLK-18

J6-10

BRN/WHT-18

WHT/BLK-22

RED-22

WHT/BLK-22

WHT/RED-18

J6-16

J1-1

J1-5

J7-1

J7-4

J5-1

J5-3

J2-1 RED-18

GRAY-18

BLK-18

J2-5 RED-18

GRAY-18

J2-8 WHT-18

J10-1	WHT/ORN-22
	PINK-22
J10-4	ORN-22
	GRN-22

J9-1			RED-18
			BLK-18
			WHT/RED-22
J9-5			BLU-22
			YEL-22

RED-18

BLK-18

WHT/BLK-22

WHT/BLU-22

WHT/YEL-22

J9-12

J8-1 RED-20

BRN-20

VIO-22

BLK-22

J8-5 WHT/VIO-22

RED-20

BRN-20

J8-10 GRAY-22

WHT/BLK-22

WHT/GRAY-22

J8-14

J11-1

J11-5

RED-18	+V
RED-18
	+V
GRAY-18				UNIVERSAL
	-V
GRAY-18
	-V			POWER
WHT-18	GND			SUPPLY
	N/L2
BLK-18
	L1
1
BLK
WHT
			t°	TANK
							RED-18	RED
							RED-18
							BLK-18	BLK
							BLK-18
WHT/RED-22							RED
WHT/BLK-22							BLK	Heat Sink Fan
YEL-22				WHT			THERMOELECTRICS
		1					t°	Heat Sink
WHT/YEL-22				BLK
						BLK		Thermistor
BLU-22				1	1		t°
WHT/BLU-22						BLK		Cabinet
								Thermistor
							Cold Sink Fan	RED
								BLK
PRIME
NORMAL			LEFT				RIGHT
RINSE		CONDUCTANCE					CONDUCTANCE

PROGRAM

NIGHT

RUN

120 VOLTS AC

2 WIRE + GRD

SINGLE PHASE, 60 HZ

37921.0003A 08/06 © 2006 Bunn-O-Matic Corporation

26	39288 083106