Bunn SLCA-7 Service manual

Bunn SLCA-7 Service manual
SLCA-7
INSTALLATION & OPERATING MANUAL
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.
39328.0003D
10/13 ©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, 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, Velocity Brew, Air Brew, Beverage Bar Creator, Beverage
Profit Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer Control, Element, Milk Texturing Fusion, Nothing Brews Like a BUNN, 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
39328.3 070913
INTRODUCTION
This equipment dispenses hot beverages or soups on demand from powdered product. It is indoor use only on
a sturdy counter or shelf.
TABLE OF CONTENTS
Introduction.............................................................................................................................................3
User Notices............................................................................................................................................4
Initial Set-up............................................................................................................................................5
Electrical Requirements...........................................................................................................................5
Electrical Hook-up....................................................................................................................................5
Plumbing Requirements..........................................................................................................................5
Plumbing Hook-up...................................................................................................................................5
Operating Controls...................................................................................................................................6
Installing Pump Tubing............................................................................................................................8
Initial Fill & Heat.......................................................................................................................................9
Liquid Level Control.................................................................................................................................9
Rinse Alarm Feature.................................................................................................................................9
Programming The Dispenser.................................................................................................................10
Program Mode.................................................................................................................................10
Priming The Concentrate Lines..............................................................................................................13
Draining The Hot Water Tank.................................................................................................................14
Operating The Dispenser........................................................................................................................14
Cleaning And Preventive Maintenance...................................................................................................15
Daily Rinsing....................................................................................................................................15
Daily Parts Washing.........................................................................................................................15
Weekly Sanitizing.............................................................................................................................15
Weekly Parts Washing.....................................................................................................................16
Preventive Maintenance.........................................................................................................................17
Replacing The Pump Tubing..................................................................................................................17
Calibrating The Dispenser......................................................................................................................18
Troubleshooting Guide...........................................................................................................................20
Field Calibration of the Concentrate Pumps...........................................................................................21
Calibrating of the Concentrate Pumps..............................................................................................21
Calibration the Dispenser Flow Rate.................................................................................................22
Field Calibrating the Empty Product Warning...................................................................................22
Field Adjustment of Powder Hoppers...............................................................................................23
Electrical Wiring Schematics..................................................................................................................24
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39328.3 012113
USER NOTICES
The notices on this dispenser should be kept in good condition. Replace unreadable or damaged labels.
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
Artwork for P/N: 00656.0001
Artwork Rev: A
Drawn: REF
Date: 04/22/10
00986.0000
00824.0002
11646.0002
RINSE ALARM
If all LED’S on control panel are flashing, and LED display shows
“RINSE”, a rinse function is required to clear.
37881.0000
1. Place minimum 32 ounce container under dispense nozzles.
2. Place top switch in “RINSE” position.
3. Press any dispense switch on front door. Rinse will automatically
dispense for 15 seconds, then stop
4. Place top switch in “NORMAL” position.
5. Discard rinse water and close door.
PLACE
CUP
HERE
Center container under dispense point.
Keep hands away.
All nozzles dispense HOT LIQUID.
39474.0000
To stop rinse, press STOP button on door.
ADVERTENCIA
Centre el recipiente debajo del punto de distribución.
Mantenga alejadas las manos.
Todas las toberas distribuyen LÍQUIDO CALIENTE.
Para detener el enjuague, pulse el botón STOP de
la puerta.
ALARMA DE ENJUAGUE
Si destellan todos los LED del panel de control y en la pantalla de LED
aparece “RINSE” (ENJUAGAR), se requiere aplicar la función de enjuague
para borrar la alarma.
1. Coloque un recipiente de 1 l (32 onzas) como mínimo debajo de las
toberas de distribución
2. Coloque el conmutador superior en la posición “RINSE”.
3. Pulse cualquier interruptor de distribución de la puerta delantera. Se
distribuye automáticamente el enjuague durante 15 segundos y luego se
detiene.
4. Coloque el conmutador superior en la posición “NORMAL”.
5. Deseche el agua de enjuague y cierre la puerta.
39591.0000
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39328.3 012113
INITIAL SET-UP
1. Apply the four non-skid pads from the parts box to the bottom of the legs.
2. Remove the drip tray assembly and drip tray bracket from the parts box.
3. Place a set of key holes in the drip tray bracket over the lower two screws in the panel below the hopper access door; push down gently and tighten screws.
ELECTRICAL REQUIREMENTS
CAUTION - The dispenser must be disconnected from the power source until specified in Electrical Hook-Up.
The dispenser can be wired to a 120V, 2 wire with ground.
Refer to the dispenser’s dataplate for exact voltage requirements.
ELECTRICAL HOOK-UP
CAUTION – Improper electrical installation will damage electronic components.
1. An electrician must provide electrical service as specified.
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. Place the main power switch in the "ON" position.
5. 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 REQUIREMENTS
This dispenser must be connected to a cold water system with operating pressure between 20 and 100 psi (138
and 690 kPa). This water source must be capable of producing a minimum flow rate of 4.5 fl. oz. (133.1 ml) per
second. A shut-off valve should be installed in the line before the dispenser. Install a regulator in the line when
pressure is greater than 100 psi (690 kPa) to reduce it to 50 psi (345 kPa). The water inlet fitting is .25" (9.52
mm) flare.
NOTE - At least 18 inches (457 mm) of an FDA approved flexible beverage tubing, such as reinforced braided
polyethylene or silicone, before the dispenser will facilitate movement to clean the countertop. 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.
NOTE - If a backflow prevented is required by code, a shock arrestor should be installed between backflow preventer
and dispenser. Installing the shock arrestor as close to the dispenser as possible will provide the best results.
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.
PLUMBING HOOK-UP
1. Flush the water line and securely attach it to the flare fitting on the bottom of the dispenser.
2. Turn-on the water supply.
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39328.3 012113
OPERATING CONTROLS AND INTERFACE
1.
2.
3.
4.
5.
6.
7.
8.
Cup Size Buttons: Momentarily pushed to select beverage size to dispense.
Stop Button: Momentary pushed to stop dispensing.
Decaf Button: Momentarily pushed to select Decaffeinated coffee.
Dispense Buttons: Momentarily pushed to dispense selected beverage.
Decaf refill LED: Illuminates when left (Decaf) concentrate can needs replaced.
Coffee (Hot Chocolate) refill LED: Illuminates when right (Regular) concentrate can needs replaced.
Main Power Switch: Removes AC power to tank heater and control circuits.
Function Selector Switch: Allows the user to select different dispensing functions (Located behind the
splash guard panel)
a. Rinse: Dispenses hot water only- Flushes the powder and coffee mixing chambers and dispense lines
and tips.
b. Prime: Dispenses concentrates only – Primes concentrate pumps.
c. Normal: Normal dispense mode – Dispenses mixed product.
9. 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.
10.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 display value.
c. (-): used to decrease the display value.
11.LED Display: Displays programming menus and fault messages.
7
6
39328.3 012113
OPERATING CONTROLS (Continued)
5
3
1
2
SMALL
6
STOP
1
LARGE
HOT CHOCOLATE
DECAF
CAPPUCCINO
MOCHA
CAPPUCCINO
BLACK COFFEE
LATTE
MOCHA LATTE
ESPRESSO
4
11
8
9
10
7
39328.3 012113
INSTALLING PUMP TUBING
1. Loosen the thumbscrews securing the tubing retainer plates to the pump bodies and set the retainer plates
aside.
2. Depress the tension screws and remove them from the notch in the pump body, releasing the spring tension
on the pump bands.
3. Apply lubricant (BUNN-O-Matic part no. M2531.0001) to the middle section of the new pump tubing.
4. Insert the free end of the pump tubes over the elbow fittings in the bottom of the product section as far as
possible.
5. Carefully wrap the new tubing around the rotors, making sure that the elbows end up parallel to the rotor
face.
6. Depress the tension screws and insert it in the notch in the pump body, reapplying spring tension on the
pump bands.
7. Replace the tubing retainer plates and tighten the thumbscrews.
8. Open the product containers and screw pump tube connector to coffee container fitting.
Note: Replacement Tube Kits can be purchased from BUNN-O-MATIC. Order part no. 37500.0206
9. Prime the pumps. Refer to Priming the Concentrate Lines section.
Thumbscrew
Tension
Screw
2.0”
2.0”
Lubricate between arrows
Remove Retaining Plate
Release Spring Tension
Lubricate New Tube
Tension Screw
Tube Clamp
Pump Tubing Installed
8
39328.3 012113
INITIAL FILL & HEAT
1. Turn on the water supply and connect the dispenser to the power source.
2. Water will automatically flow into the tank to the proper level and then shut-off. This will take less than ten
minutes.
3. A tank full of cold water will take approximately fifty minutes for the water to heat at 120 volts, approximately
15 minutes at 240 volts.
4. Fill the hoppers with the dry product to be dispensed. Hot chocolate in the left hopper, powder milk product
in the right hopper.
5. The LED display on the control panel behind the door splash panel will alternately display the tank water
temperature and the cold shoe temperature.
LIQUID LEVEL CONTROL
The system automatically maintains the hot water tank’s level by energizing the refill solenoid when the water
level drops below the liquid level probe. If the system has not successfully refilled in 15 minutes, a refill error
occurs. When a refill error occurs, the refill solenoid is de-energized. Once the cause of the refill error has been
investigated and cured, the system can be reset by both disconnecting (for at least 5 seconds) and then reconnecting the power to the machine.
RINSE ALARM FEATURE
Periodic rinsing of the mix chambers and dispense tips is essential for proper maintenance and optimum performance of the dispenser. The dispenser is shipped from the factory with the rinse timer enabled.
The rinse timer automatically keeps track of the time since the dispenser was last run through a rinse sequence.
If the dispenser detects that a rinse sequence has not been run for the desired time, all LEDs’ on the membrane
switch on the front door will flash, and "RINSE" will be displayed on the LED display behind the door splash
panel.
Rinse Procedure:
1. Open the front door and place the Normal/Program/Rinse switch in the RINSE position.
2. Place a large container under the dispense nozzle. Press any dispense button on the front door. The LED
display above the programming buttons will begin counting down from 8. The rinse will terminate when the
display reaches “0”.
3. Return the Normal/Program/Rinse switch to the NORMAL position, and close the front door.
EMPTY PRODUCT WARNING
The dispenser will automatically illuminate the LED next to the Decaf or Hot Chocolate button when the Decaf
or Regular coffee BIB is empty, respectively. The Refill message is triggered when conductance sensor reading
drops below the minimum setting. The factory set minimum is 450 and should be correct for many locations.
However, in some areas the hardness of the local water supply will affect this reading. It is recommended that
the Empty Product Threshold be calibrated upon installation for proper operation of the Empty Product Warning.
See "Field Calibrating the Empty Product Warning" in the Calibration section of this manual.
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39328.3 101513
SLCA-7 PROGRAMMING
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.
LED DISPLAY PROGRAM MODE DESCRIPTION
01 190
MENU
(-)
(+)
02 180
MENU
(-)
(+)
03 155
MENU
(-)
(+)
04 r un
MENU
(-)
04
MENU
(+)
05 r un
MENU
(-)
05
MENU
(+)
83
(-)
Default = 190°F
Set Tank Ready Temperature
Default = 180°F
Refill Threshold
Set tank refill threshold
Default = 155
Left hopper motor Press any beverage dispense switch,
left hopper motor will run for 10 seconds.
(+)
76
(-)
Tank Temperature
(+)
Left hopper motor Set left hopper auger power level
Default = 76
Right hopper motor Press any beverage dispense switch,
right hopper motor will run for 10
seconds.
Right hopper motor Set right hopper auger power level
Default = 83
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39328.3 012113
PROGRAMMING (Continued)
LED DISPLAY PROGRAM MODE DESCRIPTION
06
MENU
30
(-)
07
MENU
30
(-)
08
MENU
(+)
10
(-)
09
MENU
(+)
(+)
10 450
MENU
(-)
(-)
(+)
1 2 1 5.0
MENU
(-)
Right Dispense Ratio
Set Regular Coffee Ratio
Default = 30:1
Left Espresso Ration
Set Left Espresso Ration
Default = 10:1
Right Espresso Ration
Empty Product Threshold
Set Right Espresso Ration
Default = 10:1
Set Conductance Threshold
Default = 450
(+)
1 1 1 1. 0
MENU
Set Decaf Coffee Ratio
Default = 30:1
(+)
10
(-)
Left Dispense Ratio
Small Cup Dispense Time
Large Cup Dispense Time
Set Small Cup Dispense time Default=
11.0 seconds
Set Large Cup Dispense time Default=
15.0 seconds
(+)
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39328.3 012113
PROGRAMMING (Continued)
LED DISPLAY PROGRAM MODE DESCRIPTION
13
MENU
1. 8
(-)
14
MENU
0. 5
(-)
15
MENU
(+)
24
(-)
(+)
01
16
MENU
(+)
(-)
(+)
17 ###
MENU
(-)
(-)
(-)
20
MENU
Set Powder Auger Motor Delay On
time
Default = .5 seconds
Rinse Alarm Timer
Displays hours for Rinse Alarm
Default = 24 hours
Power Up Delay
Displays Time In Minutes Tank Heater
Activation Will Be Delayed After Power Up
Default = 1 minute
Cup Count
Shows Total Number Of Cups Dispensed, Or Individual Beverage Count
When Dispense Button Is Pressed
Small Cup Espresso Dispense
Time
Set Small Cup Espresso Dispense
Time
Default = 4.3 seconds
Large Cup Espresso Dispense
Time
Set Large Cup Espresso Dispense
Time
Default = 8.6 seconds
BIB Cabinet Vent Fan Speed
Set BIB Cabinet Vent Fan Speed To
LO or HI
Default = LO
(+)
LO
(-)
Powder Auger Motor Delay on
(+)
1 9 0 8. 6
MENU
Set Powder Whipper Motor Delay Off
time
Default = 1.8 seconds
(+)
1 8 0 4.3
MENU
Powder Whipper Delay Off (+)
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39328.3 012113
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 dispense button, "Small" cup button for Left Pump, "Large" cup button for Right
Pump, until concentrate flows from the dispense nozzle. Priming may take 10 to 20 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
13
6
39328.3 012113
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. Open front door and place Main Power Switch in the OFF position and let the water in the tank cool before
draining.
3. Shut off and disconnect the incoming water supply.
4. Remove the drip tray and access panels below the door.
5. Pull the clamped end of the silicone tube out of the dispenser and direct it into a drain or a container large
enough to hold the volume of water in the tank, 4.0 gallons.
6. Make certain the shut off clamp is locked tightly on the tube, and then remove the snap type clamp and plug
from end of tube.
7. Carefully release the shut off clamp to let the water drain from the tank.
NOTE - The dispenser must be refilled using the INITIAL FILL & HEAT steps before reconnecting to the power
source.
OPERATING THE DISPENSER
Set the Function Selector Switch to NORMAL and the Mode Selector Switch to RUN
1. Place a cup on the drip tray beneath the center dispense nozzle.
2. In area marked “1” of the control panel:
a. Select desired beverage size, small or large cup. This selection is mandatory for dispensing.
3. In the area marked “2” of the control panel:
a.
REGULAR coffee is the default, and no selection is required for REGULAR coffee. Press the DECAF button if a decaffeinated beverage is desired.
b. Press the button to dispense the desired beverage. Dispensing is portion controlled, and will automatically stop when correct amount of beverage has been dispensed.
4. Pressing the STOP button in the center of the control panel will stop dispensing.
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39328.3 012113
CLEANING & PREVENTATIVE MAINTENANCE
General Cleaning and Sanitizing Procedures Note: The BUNN¨ SLCA-7 dispenser incorporates a “user selectable” rinse reminder feature, which flashes the LED’s on the front panel when it is time to rinse.
Daily: RINSING
1. Open the front door and place the Normal/Program/Rinse switch in the RINSE position.
2. Place a ½ gal (2 liter) container under the dispense nozzle. Press any dispense button on the front door. The
LED display above the programming switches will begin counting down from “8”. The rinse will terminate
when the display reaches “0”.
3. Return the Normal/Program/Rinse switch to the NORMAL position, and close the front door.
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 the dispenser door.
2. Select PRIME on the Function Selector Switch and RUN on the Mode Selector Switch.
3. Remove the bag connector from the product BIB and disassemble or prop open the internal valve to allow
flow of product through the connector.
NOTE: Cutting the mating fittings from an empty bag makes an excellent “free flowing” connector for this purpose.
4. Place the bag connector into a one-gallon (3.8 liter) container of warm soapy tap water 140°F (60°C).
5. Place an empty container under dispense tip and activate the corresponding pump until the clean soapy water
is dispensed from the dispense tip.
6. Repeat steps 4 and 5 with warm tap water 140°F (60°C) to rinse the soapy water from the pump tubing.
Continue dispensing until the water is clear, and no soapy water is being dispensed.
7. Prepare 2.5 gallons (9.46L) of sanitizing solution by dissolving 1 packet of Kay 5 sanitizer into 2.5 gallons
(9.46L) of 120°F (48.9°C) water to ensure 100 ppm of available chlorine.
8. Again, repeat steps 4 and 5 with the sanitizing solution. Once sanitizing solution is visible, continue to dispense
for 1 minute. Release handle and allow solution to sit for 5 minutes.
9. After soaking for 5 minutes, activate the dispense switch a second time, this time for 2 minutes. After 2
minutes, release the dispense switch.
10.Repeat step 6 to flush out the sanitizing solution from the pump tubing.
11.Remove the mating connector from the bag connector.
12.Reattach the bag connector to product box.
13.Select NORMAL on the Function Selector Switch and RUN on the Mode Selector Switch.
14.Activate the dispenser until concentrate/water mixture appears. Then dispense 12 ounce (354.9 ml) glass of
concentrate/water mixture and discard.
15.Repeat steps 1 through 14 for other dispense head.
16.Wipe internal and external surfaces with a clean, damp cloth.
15
39328.3 012113
Weekly: Parts Washing and Sanitizing
1. Remove elbows from 2. Remove elbows from 3.Remove
dispense 4.Remove upper mix- 5. Rotate tab at bottom
ing bowl from left
both hoppers.
middle and right mixof mixing chamber
hose from left whipchamber by pulling
ing chambers, twistbases counter clock
ping chamber by
out and up.
ing slightly to help
wise to release base.
sliding it to the right.
release.
6.Remove
mixing 7.Remove middle and 8.Remove left frother 9.Rotate tab on mix- 10.Remove
dispense
chambers by pulling
right frother disk
ing chamber base
hoses from dispense
from shaft by pulling
straight out.
from shaft by pulling
further counter clock
nozzle assembly.
straight out.
straight out.
wise, and remover
from shaft by pulling
straight out.
NOTE: Insure O-ring and
shaft seal are in place
during re-assembly.
cleaning 14.When
reassem- 15.When reassembling
11.
Clean all parts re- 12.Prepare one-gallon 13.Rinse
(3.8 liter) of sanitizbrush, dip in sanibling parts, be sure
moved in warm soapy
left frother, be sure
ing solution with at
tizing solution, and
to align arrow on
water. Use Bunn P/N
to align raised bar
least 100 ppm of
brush the bore of
frother disk with
33685.0000 cleanon top of frother
available chlorine in
each of four disflat on whipper moing brush provided
shaft with the flat
120°F (48.9°C) wapense nozzles.
tor shaft, and rotate
to clean bores and
on whipper motor
ter.Soak all cleaned NOTE: Repeat this protab on whipper base
orifices. Rinse in cold
shaft.
parts in sanitizing so- cedure for each nozzle
clock wise to the
water.
lution for 5 minutes, separately.
vertical position to
then rinse thoroughly
lock mixing chamin cold water, and
ber.
dry.
16
39328.3 012113
PREVENTIVE MAINTENANCE
Bunn-O-Matic® Corporation recommends that preventive maintenance be performed at regular intervals. Maintenance should be performed by a qualified service technician. For Technical Service, contact Bunn-O-Matic®
Corporation at 1-800-286-6070.
NOTE: Replacement parts or service caused by failure to perform required maintenance is not covered by
warranty.
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 tube 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. Disconnect pump tube connector from product box by turning connector counterclockwise. Repeat for other
pump and product box.
2. Remove product box from product shelf, and remove product shelf from machine by sliding forward.
3. Refer to INSTALLING PUMP TUBING, page 8.
17
39328.3 012113
CALIBRATING THE DISPENSER
CALIBRATION MODE: The SLCA-7 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.
LED DISPLAY CALIBRATION MODE DESCRIPTION
C1 r u n
MENU
(-)
(-)
(-)
(-)
(-)
(+)
C 3 .4 1 4
MENU
(-)
Right Pump Cal.
Set PRIME-NORMAL-RINSE switch
to PRIME position.
Press the LARGE button, left pump
will run for 100 counts
Right Pump Cal.
Enter ml collected from the 100 count
test above.
Default = 43.0 ml
Left Coffee Water Rate
Set PRIME-NORMAL-RINSE switch
to RINSE position
Press the SMALL button, left pump
dilution water will run for 20 seconds.
Left Coffee Water Rate
Enter Liters collected from 20 sec.
test above
Default = .414
(+)
C3 r u n
MENU
Enter ml collected from the 100 count
test above.
Default = 43.0 ml
(+)
C 2 4 3. 0
MENU
Left Pump Cal.
(+)
C2 r u n
MENU
Set PRIME-NORMAL-RINSE switch
to PRIME position.
Press the SMALL button, left pump
will run for 100 counts
(+)
C 1 4 3. 0
MENU
Left Pump Cal.
(+)
18
39328.3 012113
CALIBRATING THE DISPENSER (Continued)
LED DISPLAY CALIBRATION MODE DESCRIPTION
C4 r u n
MENU
(-)
(+)
C 4 .4 1 4
MENU
(-)
(+)
C5 E 0 0
MENU
(-)
(+)
C6 - - MENU
(-)
Right Coffee Water Rate
Set PRIME-NORMAL-RINSE switch
to RINSE position
Press the LARGE button, right pump
dilution water will run for 20 seconds.
Right Coffee Water Rate
Enter Liters collected from 20 sec.
test above
Default = .414
Displays fault
Use the (+) or (-) button to scroll forward or backward through faults.
Reset Factory Defaults
Resets all set up values to the Factory
Default Setting.
Hold both Increase (+) and Decrease
(-) buttons for 10 seconds
(+)
C P 0 XX
MENU
(-)
Displays Software Version #Exits to home view after 3 sec.
(+)
19
39328.3 012113
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
EC 0 0 1
MENU
(-)
(+)
EC 0 0 2
MENU
(-)
(+)
EC 0 0 3
MENU
(-)
(+)
EC 0 0 4
MENU
(-)
(-)
(+)
EC 0 1 0
MENU
(-)
Left Motor or RPM Sensor Failure.
Check Motor and RPM sensor wires
for shorts or open connections
Right (Regular) Pump Failure
Right Motor or RPM Sensor Failure.
Check Motor and RPM sensor wires
for shorts or open connections
Heating Time Too Long
Tank Heater ON Continuous For More
Than 1.5 Hour. Check heater wires
for open connections.
Fill Time Too Long
Fill Valve ON Continuous For More
Than 15 minutes. Water Turned OFF.
Refill Valve disconnected. Faulty
Valve.
(+)
EC 0 0 7
MENU
Left (Decaf) Pump Failure
Tank Temp Sensor Failed
Overflow Switch Fault
(+)
20
Sensor Reading Out Of Range (High
or Low). Faulty Sensor wiring.
Water In Overflow Cup. Check liquid
level probe in tank lid for lime builup.
Check level probe wiring for open circuit.
39328.3 012113
Field Calibration of the Concentrate Pumps, Dispenser Flow Rates,
and Hopper Powder Throw
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 or 100 ml graduated cylinder, with 1 ml graduations.
1000 ml graduated container.
NOTE: You can calibrate either the Concentrate Pump, Dispenser Flow Rate and set the Hopper Throw 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.
Decaf Coffee - 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. Remove the elbow from the Left (Decaf) Coffee Mixing Chamber and place a container under the mixing
chamber outlet. Press the SMALL cup button. The dispenser will display a 100 count down and then shut
the pump OFF automatically. Release the dispense switch.
5. Stop priming and allow the tip to stop dripping. Discard the concentrate collected.
6. Place a 50 ml graduated cylinder under the Left (Decaf) Coffee Mixing Chamber outlet.
7. Press the SMALL cup button. The dispenser will display a 100 count down 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 40 - 48 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.
Regular Coffee - Concentrate Pump Calibration
Depress the MENU button to display the Regular Concentrate Pump calibration menu “C2 run”. Repeat STEPS
3 – 13 above for the right side “Regular” pump, using the LARGE cup button.
(Continued)
21
39328.3 012113
Calibrating the Dispenser Flow Rates
Decaf Coffee - Dispenser Flow Rate Calibration
1. Select RINSE on the Function Selector Switch, and PROGRAM of the Mode Selector Switch. Depress and
Hold the MENU switch for approximately 10 sec. The unit will display “C1 run” when it has entered the Calibration Mode
2. Press the MENU button to display the Decaf Coffee Flow Rate calibration menu “C3 run”
3. Reconnect the elbow to the Left (Decaf) Coffee Mixing Chamber outlet. Place a container under Dispense Tip
and depress the SMALL cup button. A steady stream of water comes out the tip (20 seconds).
4. Allow the tip to stop dripping. Discard the water collected
5. Place a 1000 ml graduated container under Dispense Tip.
6. Press the DECAF dispense button. The dispenser will display a 20 second count down timer and then stop
dispensing automatically.
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 .39 - .43 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.
Regular Coffee - Dispenser Flow Rate Calibration
Depress the MENU button to display the Regular Coffee Flow Rate calibration menu “C4 run”.
Repeat STEPS 3 – 12 above for the right side Regular dispense valve, using the LARGE cup button.
Field Calibrating the Empty Product Warning
The dispenser will automatically illuminate the LED next to the Decaf or Hot Chocolate button when the Decaf or
Regular coffee BIB is empty. The Refill message is triggered when the conductance sensor reading drops below
the minimum setting. The factory set minimum is 450 and should be correct for many locations. However, in
some areas the harness of the local water supply will affect 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 in the container,
use the following procedure to find the correct Empty Product Threshold.
Calibrating The Empty Product Threshold
1. Remove the coffee concentrate BIB(s) from the Unit
2. Open the dispenser door to access the digital programming module with LED
3. Place a large container under the dispenser tip.
4. Place the NORMAL/PROGRAM/RINSE switch into the RINSE position
5. Press any dispense button on the door. The unit will automatically rinse for eight seconds. Repeat until the
water exiting the coffee nozzle is running clear.
6. Place the NORMAL/PROGRAM/RINSE switch into the RUN position.
7. Press the LARGE and the BLACK COFFEE button. Observe the numbers display on the LED panel, the
conductance reading will be displayed. (NOTE: It is typical for this number to fluctuate (+/-25) about the
nominal value.) This is the conductance of the water in your area. Record this reading.
8. Repeat steps six and seven, only pressing LARGE, DECAF and BLACK COFFEE button. Record this reading.
22
39328.3 101513
9. Install the coffee BIB’s into the unit, and prime the pumps. Dispense several cups of both regular coffee and
Decaf coffee. If either one or both the DECAF and HOT CHOCOLATE LED illuminates during this process
and dispensing is disabled, the EMPTY PRODUCT WARNING can be reset by priming the appropriate pump
momentarily.
10.After several cups of both coffees have been dispensing, dispense both a REGULAR coffee and a DECAF
coffee. Observe the conductivity reading for each, and record.
11.Take the average of the largest reading from steps seven and eight with the lowest reading from step ten,
and enter this new value in the Empty BIB threshold position, “P10 XXX”, see Programming the dispenser.
Example, if the conductance readings with water from steps six and seven are 225 and 250, and the conductance readings with coffee from step ten is 355 and 370, you would average 250 and 355, and enter “302”
for the empty BIB threshold in “P10 XXX”.
Field Adjustment of Powder Hoppers
The powder throw for the powder products is pre-set from the factory. It can be checked and adjusted in the
field using this calibration procedure.
Adjusting the Hopper Throw Weight
1. Open the dispenser door to access the digital programming module with LED.
2. Remove the mixing chamber below the hopper outlet elbow.
3. Select PROGRAM on the Function Selector Switch, and NORMAL for the Mode Selector Switch.
4. Press the MENU button to display the Left Hopper Motor calibration menu “04 run”
5. Hold a container under the hopper outlet elbows, and press any beverage button on the front door.
6. The left hopper will run automatically for 10 second, and then stop.
7. Weight the contents of the container. Divide by 10 to determine grams or ounce per second of throw.
8. Press the MENU button to increment the display to menu “O4 XXX”. The number displayed is the power
level drive of the hopper motor. The power level can be increased or decreased by pressing (-) or (+) button.
Each increment is equal to approximately a 1% increase or decrease in hopper motor speed.
9. Press the MENU button to display the Right Hopper Motor calibration menu “05 run”.
10.Repeat steps 5 – 8 to measure and adjust the right hopper throw weight.
11.Replace the powder-mixing chamber, and return the Function Selector Switch to the RUN position.
23
39328.3 101513
ELECTRICAL WIRING DIAGRAM SLCA-7
SCHEMATIC WIRING DIAGRAM SLCA-7
WHI
WHI/VIO
120/208-240 VAC
CONNECTION
GROUND
BLK
BLK
120 VAC
CONNECTION
WHI/VIO
WHI
WHI/VIO
WHI
BLK
230 VAC
CONNECTION
L1 N L2
L1 N L2
L1 L2
BLK
WHI
WHI
4
LIMIT
THERMOSTAT
3
BLK
RED
TANK HEATER
BLK
2
BLK
+ SOL -
N.O.
LEFT COFFEE
RED
RED
ORN
COM
+ SOL -
BLU
BRN/WHI
+ SOL POWDER
RED
YEL
RED
RIGHT COFFEE
GRY
1
1
+ SOL -
GRY
BRN/WHI
ORN
INLET VALVE
5 J3
BLK
RED
+V
+V
POWER SUPPLY
-V
24VDC, 180 WATTS
-V
GROUND
N/L2
L1
BLK
WHI
J6
RED
OVERFLOW
PROTECTION SWITCH
1
BLK
RED
WHI
GRY
WHI
5
RED
WHI
BLK
YEL
8
1
RIGHT
HOPPER (2)
M
M
-
-
RIGHT
PUMP (4)
+
-
WHI/BLU
WHI/BLU
1
WHI/RED
10
10
8
RED
VIO
t°
ORN
RED/BLK
230 VAC CONNECTION
20
YEL
GRN
- M +
BLU
GRN
1
MEMBRANE
SWITCH
TANK
15
GRN
BRN/WHI
RIGHT COFFEE WHIPPER (4)
PROBE
GRN
J1
GRN
- M +
ORN
4
BLK
WHI
PNK
WHI/BLK
GRN
LEFT COFFEE WHIPPER (3)
WHI/ORN
GRN
5
POWDER WHIPPER (1)
J5
BLK
WHI/RED
- M +
1
BLU
4
WHI/RED
RED/BLK
1
5
YEL
6
WHI/BLU
WHI/BLK
RED
3
+
4
1
ORN
2
7
3
BRN/BLK
BRN/WHI
-
1
M
GRN
RED
GRY
GRN
3
RIGHT RPM
SENSOR
BRN/WHI
WHI/BLU
WHI/BLK
TAN
1
M
J15
WHI/RED
GRN
+
LEFT RPM
SENSOR
LEFT
PUMP (3)
BRN/WHI
GRN
+
MENU
(-)
(+)
1
MAIN CONTROL BOARD
LEFT
HOPPER (1)
J11
3
BLK
BLK
RED
M
WHI
BLK
RED
RED
WHI
M
WHI
WHI
BLOWER FAN
BLOWER FAN
1
5
J4
10
J14
5
1
WHI/RED
5
A1
A8
A2
A9
A3
A6
A4
BLU
A13 A12 A11 A10
ORG
WHI
BLK
WHI/BLK
1
10
12
5
RED/WHI
1
RED
5
WHI/VIO
BLU/WHI
GRN/WHI
RED/BLK
L1
J16
L3
L5
VIO
L6
RED
BLK/RED
15
10
GRY
WHI/BLK
WHI/GRY
L7
NORMAL
PROGRAM
NIGHT
L8
BLU/RED
ORG/RED
RED
WHI/RED
14
20
LED TAIL
LEFT
CONDUCTANCE
RIGHT
CONDUCTANCE
RINSE
BLU/BLK
WHI/BLK
RED/GRN
PRIME
BLK
10
GRN/BLK
L4
VIO
VIO
J2
ORG/BLK
L9
LED INDICATORS:
L1 DECAF
L2 HOT CHOCOLATE
L3 NOT USED
L4 CAPPUCINO
L5 MOKA CAPPUCINO
L6 BLACK COFFEE
L7 LATTE
L8 MOKA LATTE
L9 ESPRESSO
BLK/WHI
GRN
L2
MEMBRANE SWITCH
SHEILD LAYER
FAN
J13
SWITCH TAIL
SWITCHES:
A1 SMALL CUP
A2 STOP
A3 LARGE CUP
A4 DECAF
A5 NOT USED
A6 HOT CHOCOLATE
A7 NOT USED
A8 CAPPUCINO
A9 MOCHA CAPPUCINO
A10 BLACK COFFEE
A11 LATTE
A12 MOCHA LATTE
A13 ESPRESSO
- M +
RUN
120/208-240 VOLTS AC
3 WIRE + GROUND
or
120 or 230 VOLTS AC
2 WIRE + GROUND
SINGLE PHASE
60 HZ
39318.0008 03 07/12 ©2012 BUNN-O-MATIC CORPORATION
24
39328.3 012113
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