Bunn LCR-2A Operator’s Manual
! WARNING HOT LI
QUIDS
! AVERTISSEMENT LIQUIDES CHAUDS
POW
ER
READY
PO
R
TIO
N
RINSE
REFIL
L
ST
O
P!
HO
T
WATER
RELEASED FOR PRODUCTION
LCR-2
LCR-2A
LCR-2 PC
LCR-2A PC
INSTALLATION & OPERATING GUIDE
BUNN-O-MATIC CORPORATION
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.
36026.0001B 11/14 ©2013 Bunn-O-Matic Corporation
DIR Num: 36026.0001 19, May 2015
POST OFFICE BOX 3227
RELEASED FOR PRODUCTION
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, MCR/MCP/MCA single cup 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, Air Infusion, 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, TRIFECTA (sylized logo), Velocity Brew, Air Brew, Beverage
Bar Creator, Beverage Profit Calculator, Brew better, not bitter., Build-A-Drink, BUNNSource, Coffee At Its Best, Cyclonic
Heating System, Daypart, Digital Brewer Control, Element, Milk Texturing Fusion, Nothing Brews Like a BUNN, Picture
Prompted Cleaning, Pouring Profits, Signature Series, Sure Tamp, 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.
2
36026.1 031314
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RELEASED FOR PRODUCTION
CONTENTS
Warranty .......................................................................... 2
Introduction ..................................................................... 3
User Notices .................................................................... 4
Electrical Requirements ................................................... 5
Plumbing Requirements .................................................. 6
CE Requirements ............................................................. 6
Initial Set-up .................................................................... 7
Electrical Hook-up ............................................................ 7
Plumbing Hook-up ........................................................... 7
Installing the Drip Tray and Flip Down Cup Tray ...............8
Operating Controls & Interface ........................................ 9
Selecting the Correct Pump Tubing ................................ 10
Setting Dispenser Flow Rate .......................................... 11
Adjusting Mix Ratios ...................................................... 12
FlavorGard™ Feature ...................................................... 13
Rinse Alarm Feature ....................................................... 13
BIB Empty Lockout Feature ............................................ 14
Brew Temperature Lockout Feature
Programming the Dispenser .......................................... 15
Initial Fill & Heat ............................................................. 21
Loading the Concentrate ................................................ 22
Priming the Concentrate Lines ....................................... 22
Operating the Pull & Hold Dispenser .............................. 23
Operating the Preset Portion Control Dispenser ............ 24
Filling Cambros or other large containers ...................... 24
Cleaning & Preventive Maintenance ............................... 25
Replacing the Pump Tubing ........................................... 26
Draining the Hot Water................................................... 27
Troubleshooting ............................................................. 28
Field Calibration of the Concentrate Pumps ................... 33
Dispenser Flow Rate Calibration .................................... 34
Field Calibrating the Hot Water Flow Rate ...................... 34
Field Calibrating the Empty BIB Warning ........................ 35
Schematic Wiring Diagrams ........................................... 36
................................ 14
INTRODUCTION
The Liquid Coffee Refrigerated Dispenser 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 portioncontrol to fill carafes and decanters for wait staff. Follow the Concentrate Manufacturer’s Storage and Shelf Life
recommendations. Product Flavor Profile is extended with refrigerated product storage cabinet featured in the
LCR-2 and LCR-2 PC.
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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36026.1 010313
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.
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.
33461.0008A
RELEASED FOR PRODUCTION
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec-
tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels.
00656.0001
00986.0002
37881.0000
11646.0002
Moving Parts.
Do not operate
unit with this
Risk Of Electrical Shock.
Disconnect power before
servicing unit.
panel removed.
27442.0000
CHARGE
Type R134A, Amount 4 oz (113.4 gm)
Design Pressures:
High 230 psi (15.9 bar) (1.59 MPa)
Low 88 psi (6 bar) (0.61 MPa)
33461.0008
WARNING CENTER LEG OF CUP TRAY MUST BE SUPPORTED BY THE DRIP TRAY!
00824.0002
DIR Num: 36026.0001 19, May 2015
47624.0000
4
36026.1 111714
120V A.C.
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 To p Red Terminal as shown.
Fig. 1 Fig. 2 Fig. 3
FIELD WIRING TERMINAL BLOCK DIAGRAM
3. For 120/208 - 240V A.C./3-Wire per Fig. 3.
RELEASED FOR PRODUCTION
USER NOTICES (Cont)
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
28181.0003
BRN
L1
L1L2L3N
BLK
L2
RED
L3
TO MACHINE
N
BLU
FOR 3-PHASE OPERATION
CONNECT INPUT WIRING TO
L1,L2,L3 & N AS SHOWN.
TERMINAL
BLOCK
FROM POWER SOURCE
FOR 1-PHASE/30 AMP. OPERAT ION
MOVE BLACK WIRE INTO
TERMINAL BLOCK WITH BROWN
WIRE, CONNECT INPUT WIRING
TO L1 & N AS SHOWN.
39762.0000
BRN
BLK
RED
TO MACHINE
BLU
L1L2L3N
L1
N
FROM POWER SOURCE
BRN
L1
L1L2L3N
BLK
RED
TO MACHINE
FOR 1-PHASE/15 AMP. OPERAT ION
CONNECT INPUT WIRING TO
BLU
L1 & N AS SHOWN.
N
FROM POWER SOURCE
Optional Field Wiring
230 V, 26 A, 6000 W
1PH, 2-Wire + GND, 50/60HZ
or
230 V, 13 A, 3000W
1PH, 2-Wire + GND, 50/60HZ
ELECTRICAL REQUIREMENTS
29710.0014
CAUTION: The dispenser must remain disconnected from power source until specified in Electrical Hook-Up.
The LCR-2 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.
The LCR-2C dispenser is 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
RED
TO MASTER
ON/OFF
SWITCH
BLACK
1. Unit shipped per Fig. 1, wired for 120V A.C./2-Wire.
2. For 208 - 240V A.C./2-Wire per Fig. 2.
120V A.C.
Fig. 1 Fig. 2
For all 208 - 240 Volt Connections: Use No. 10 AWG Wires suitable for 90°C (194°F)
DIR Num: 36026.0001 19, May 2015
TO MASTER
ON/OFF
SWITCH
RED
BLACK
208 or
240V A.C.
5
TO MASTER
ON/OFF
SWITCH
RED
BLACK
120V A.C.
120V A.C.
Fig. 3
208 or
240V A.C.
36026.1 010313
200, 230 or
RELEASED FOR PRODUCTION
ELECTRICAL REQUIREMENTS (Cont.)
CAUTION: The dispenser must remain disconnected from power source until specified in Electrical Hook-Up.
The LCR-2A 3 Phase dispenser is internally wired from the factory for 400 Volts AC Phase to Phase, 220-240 Volts AC
Phase to Neutral, 3 Phase 50/60 Hz. It requires a 4-wire, grounded, individual branch circuit rated for 400 Volts AC, Three
Phase, 50/60 Hz. At Three Phase operation, each Phase will have approximately 13.5-14.0 Amps flow through it.
The LCR-2A 3 Phase dispenser can be Field Wired for 220-240 Volts AC, Single Phase applications. This requires a
2-wire, grounded, individual branch circuit rated for 220-240 volts AC, Single Phase, 50/60 Hz. At Single Phase operation,
the machine will have approximately 27.5 Amps flow through it.
NOTE: The internal terminal block must be rewired for 220-240 Volts AC, Single Phase applications, (see Optional Field
Wiring Diagram).
BRN
BLK
RED
TO MACHINE
BLU
FOR 1-PHASE/30 AMP. OPERATION
MOVE BLACK WIRE INTO
TERMINAL BLOCK WITH BROWN
WIRE, CONNECT INPUT WIRING
TO L1 & N AS SHOWN.
L1
L1L2L3N
N
BRN
BLK
RED
TO MACHINE
FROM POWER SOURCE
BLU
FOR 1-PHASE/15 AMP. OPERATION
CONNECT INPUT WIRING TO
L1 & N AS SHOWN.
L1
L1L2L3N
N
FROM POWER SOURCE
L2 RED
230V A.C.
L1 BLACK
240V A.C.
The LCR-2A dispenser is internally wired from the
BRN
BLK
RED
TO MACHINE
BLU
FOR 3-PHASE OPERATION
CONNECT INPUT WIRING TO
L1,L2,L3 & N AS SHOWN.
L1
L1L2L3N
L2
L3
N
FROM POWER SOURCE
TERMINAL
BLOCK
factory for 220-240 Volts AC Single Phase 50/60
Hz. It requires a 2-wire, grounded, individual
branch circuit rated for 220-240 Volts AC.
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.
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
(0.138 and 0.620 MPa) 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 (0.620 MPa) to reduce it to 50 psi (0.345 MPa). 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.
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.
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.
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1/16" to 1/8"
LEVEL
RELEASED FOR PRODUCTION
INITIAL SET-UP
NOTE: The LCR-2 dispenser weighs approximately 100 lbs. (45 kg). If necessary, use more than one person
when lifting or moving the dispenser.
1. Cut the two straps and remove the box and foam packing.
2. Locate and remove the information packets and tube kits from top of packaging and set aside.
3. Open the dispenser door and remove the drip tray and the lower splash guard panel.
4. Set dispenser on the counter where it is to be used. CAUTION: DO NOT LIFT ON THE DOOR.
5. Confirm the dispenser is level on the counter (See LEVELING THE DISPENSER).
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.
LEVELING THE DISPENSER
Proper leveling of the dispenser is required to insure proper drainage of condensation from the refrigeration
unit.
1. Set the dispenser on a level counter top.
2. Use the adjustable legs to level the dispenser on all four corners.
3. Once the unit is level, adjust the front two legs out another 1/16” to create a slight tilt towards the rear of the
dispenser. (See Fig. 1)
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RELEASED FOR PRODUCTION
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 LCR-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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RELEASED FOR PRODUCTION
SELECTING THE CORRECT PUMP TUBING
There are two pump tube sizes available for use with this dispenser. To determine the correct tubing for your
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
2.0”
Lubricate between arrows
2.0”
Remove Retaining Plate Release Spring Tension Remove Tubing
Tension Screw
Tube Clamp
Install New Tubing Completed Installation
9
DIR Num: 36026.0001 19, May 2015
Lubricate New Tube
36026.1 010313
BUNN ICED COFFEE
AMBIENT UNIT
RELEASED FOR PRODUCTION
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 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
8
7
9
10
1
11
12
4
15
13
14
2
3
10
36026.1 010313
DIR Num: 36026.0001 19, May 2015
RELEASED FOR PRODUCTION
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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RELEASED FOR PRODUCTION
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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