Crescendo
Bean to Cup Espresso System
®
INSTALLATION & OPERATING GUIDE
To ensure you have the latest revision of the Operating Manual, 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.
Post Office Box 3227, Springfield, Illinois 62708-3227
Phone (217) 529-6601 | Fax (217) 529-6644
52384.0001 D 04/19 © 2016 Bunn-O-Matic Corporation
Bunn-O-Matic Corporation
www.bunn.com
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants the BUNN Crescendo as further described below for a warranty period of 1 year parts
and labor.
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. 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. Additionally, the following is excluded from the warranty period:
Warranty Exclusions:
• Parts such as, but not limited to, hoppers and lids, drip trays, and plastic parts damaged due to improper handling or
cleaning agents.
• Replacement of wear items such as, but not limited to, O-rings, gaskets, silicone tubes, hoses, and valve seats.
• Repairs made necessary due to poor water quality such as dispense valves, water inlet valves, scaling in the steam or hot
water boilers. (Total Hardness recommended range of 4-7 gpg constant).
• Improper voltage. (See equipment operations manual for voltage specifications).
• Failure to use BUNN approved cleaning supplies constitutes improper maintenance.
• Failure to have required preventive maintenance performed by BUNN technician or authorized espresso service provider.
• Parts replaced under the terms of this warranty carry the remainder on the machine’s parts warranty term, or 60 days,
whichever is greater.
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, vemycoffee.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
52384.1 031314
CONTENTS
Warranty ........................................................................................................................ 2
User Notices .................................................................................................................. 4
North America Requirements ......................................................................................... 5
Initial Setup .................................................................................................................... 6
Electrical Hookup ........................................................................................................... 8
Plumbing Requirements ................................................................................................ 9
Initial Fill & Heat ............................................................................................................ 9
Filling Soluble Hoppers ................................................................................................ 10
Operating Controls and Interface ................................................................................. 11
Creating “Custom” Beverage ....................................................................................... 12
Through Counter Option .............................................................................................. 16
General Cleaning .......................................................................................................... 17
Preventive Maintenance ............................................................................................... 25
Adjustments ................................................................................................................. 26
Door Safety Interlock ................................................................................................... 30
Wiring Schematic ........................................................................................................ 31
Tip: For advanced programming information, please visit the Bunn-O-Matic website,
at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the
latest information.
3
USER NOTICES
The notices on this dispenser should be kept in good condition. Replace unreadable or damaged labels.
WARNING
Use only on a properly protected
circuit capable of the rated load.
Electrically ground the chassis.
Follow national/local electrical codes.
Do not use near combustibles.
Do not deform plug or cord.
FAILURE TO COMPLY RISKS EQUIPMENT
DAMAGE, FIRE OR SHOCK HAZARD.
READ THE ENTIRE
OPERATING MANUAL BEFORE
USING THIS PRODUCT
00986.0000M 10/14 ©1994 Bunn-O-Matic Corporation
00986.0000
12368.0002
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
WARNING
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.
37881.0000
00824.0002
4
042319
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 can be used by persons aged from 18 years and above if they have been given supervision or
instruction concerning use of the appliance in a safe way and if they understand the hazards involved.
• Keep the appliance and its cord out of reach of children aged less than 18 years.
• Appliances can be used by persons 18 years and above with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards involved.
• Children under the age of 18 years 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.
• Cleaning and user maintenance shall not be made by children unless they are older than 18 years
and supervised.
• This appliance is intended to be used in household and similar applications such as:
– staff kitchen areas in shops, offices and other working environments;
– by clients in hotels, motels and other residential type environments;
– bed and breakfast type environments.
• This appliance not intended to be used in applications such as:
– farm houses;
• Access to the service areas permitted by Authorized Service personnel only.
• The A-Weighted sound pressure level is below 70 dBA.
NORTH AMERICAN 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 41°F to 95°F
(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 pressure washer.
• This appliance can be used by persons aged from 18 years and above if they have been given supervision
or instruction concerning use of the appliance in a safe way and if they understand the hazards involved.
• Keep the appliance and its cord out of reach of children aged less than 18 years.
• Appliances can be used by persons 18 years and above with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards involved.
• Children under the age of 18 years 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.
• Cleaning and user maintenance shall not be made by children unless they are older than 18 years and supervised.
• This appliance is intended for commercial use in applications such as:
– staff kitchen areas in shops, offices and other working environments;
– by clients in hotel and motel lobbies and other similar types of environments;
• Access to the service areas permitted by Authorized Service personnel only.
5
042319
INITIAL SET-UP
1. Remove drip tray and cover from the parts box. Assemble the cover to the drip tray, then slide under
the front door of the machine, engaging the rear of the drip tray into the opening in the lower front of
the machine.
2. Remove the espresso brew group from the parts box.
3. Slide tube onto elbow fitting on upper left side of
espresso group head as shown in Figure 1.
Figure 1
P4375
4. Place groove on lower front of group head over
mounting bar on espresso drive as shown
in Figure 2.
Groove
Mounting
Bar
Figure 2
P4376
6
042319
INITIAL SET-UP - continued
6. Rotate the top of group head toward rear of machine until
it snaps into place as shown in Figure 3.
7. Slide red lock to the right until it snaps into place as
shown in Figure 4.
8. Install group head tube into quick connect fitting on
bottom of espresso drive, insuring that the tube is
fully inserted as shown in Figure 5.
Figure 3
Figure 4
P4377
P4378
Brew Tube
Connection
7
Figure 5
P4379
042319
INITIAL SET-UP - continued
9. Remove the bean hopper from the parts box. Align the
bean hopper so that the collar on the bottom of the
bean hopper will engage the opening in the grinder
as shown in Figure 6.
10. When the hopper is in place on the grinder, pull the
hopper gate all the way forward to allow beans into the
grinder, then lock hopper in place as shown in Figure 7.
Figure 6
CAPACITY
Figure 7
1. Brew chamber has a capacity rating of 5 gm minimum up to 15 gm maximum of espresso grind coffee.
2. Brewer has a peak capacity of 60 single (small) espresso shots per hour.
ELECTRICAL REQUIREMENTS
CAUTION - The dispenser must be disconnected from the power source until specified in Electrical Hook-Up.
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. 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.
Configuration
120V Configuration:
This electrical service consists of 2 current carrying conductors
(L1 and Neutral) and a separate conductor for chassis ground.
120-208/240V Configuration:
This electrical service consists of 3 current carrying conductors (L1, L2 and Neutral) and a separate conductor for chassis
ground.
X
G
W
Y
220-240V Configuration:
This electrical service consists of 2 current carrying conductors
(L1, L2) and a separate conductor for chassis ground,
120V
Models
8
220-240V
Models
120-208/240V
Models
042319
PLUMBING REQUIREMENTS
This dispenser must be connected to a cold water system with operating pressure between 138 - .620 MPa
(20 and 90 psi) 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 .620 MPa (90 psi) to reduce it to .345 MPa (50 psi).
The water inlet fitting is 3/4” NPT (US and Canada Models) and 3/4 British Parallel Pipe for all other models.
NOTE: Bunn-O-Matic recommends 6mm copper tubing for installations of less than 25 feet and 8mm for more than
25 feet from the water supply line. At least 18 inches of an FDA approved flexible beverage tubing, such as reinforced
braided polyethylene or silicone, before the dispenser will facilitate movement to clean the counter top. Bunn-O-Matic
does not recommend the use of a saddle valve to install the dispenser. The size and shape of the hole made in the
supply line by this type of device may restrict water flow.
As directed in the International Plumbing Code of the International Code Council and the Food Code Manual of
the Food and Drug Administration (FDA), this equipment must be installed with adequate backflow prevention to
comply with federal, state and local codes. For models installed outside the U.S.A., you must comply with the
applicable Plumbing /Sanitation Code for your area.
NOTE: If a backflow preventer 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
NOTE: The plumbing connection is located on the back of the unit, using the water line included with some models, that
connects to a 3/8” male flare or 3/4” hose thread.
1. Flush the water line and securely attach it to the valve threads on the rear of the dispenser.
2. Turn on the water supply.
INITIAL FILL & HEAT
1. Turn on the water supply, connect power to the dispenser, and place the main power switch on the rear of the
machine to the ON position.
2. Water will automatically flow into the soluble tank to the proper level, then shut off. This will take less than five
minutes. In the event that a message appears “fill time too long” powder cycle to clear the message.
3. The screen on the front door will display FILL ESPRSO TANK. Press the button under START.
4. The screen will display MOVING BREW CHAMBER, ESP TANK FILLING, and the espresso tank will begin filling. This
may take several minutes. In the event that a message appears “fill time too long”, flip the toggle switch to program
mode, then back to normal position to clear the message.
5. When water dispenses from the espresso nozzle into the drip tray, press YES under WATER DISPENSED? to stop
the tank filling.
6. The tanks will then begin heating. When the tanks have completed heating, the display will read “READY TO BREW
SELECT SIZE”.
PRESET TANK TEMPERATURE
The tank temperatures have been preset at the factory to 80°C (180°F) for the soluble tank, and 102°C (215°F) for the
espresso tank. Bunn recommends that to provide the best quality beverage, the installer adjust the tank temperature to
the powder product manufacturers recommended temperature for the hot powder product being used.
1. Fill the hopper(s) with the dry product to be dispensed.
2. Fill the bean hopper with the whole beans to be ground and brewed. A grinder calibration should be performed.
LIQUID LEVEL CONTROL
The system automatically maintains the soluble 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, 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 either cycling the power to the machine (at least five seconds) using the main power switch at the rear of
the machine, or by entering one of the program modes (see Programming Modes.)
9
042319
Filling Soluble Hoppers
1. Remove packing material from on top of the powder hoppers.
2. Remove powder hoppers by lifting the front of the powder
hopper until the peg on the bottom of the hopper clears the
hole in the mounting plate (see Figure 1). Then pull the
hopper forward to remove.
3. Set the hoppers on the counter, and push the elbows up
(see Figure 2) to close the chutes.
Figure 1
Figure 2
Figure 3
10
Figure 3
042319
OPERATING CONTROLS AND INTERFACE
1. Cup Size Buttons: Momentarily pushed to select beverage size to dispense.
2. Dispense Buttons: Momentarily pushed to dispense selected beverage
3. LED indicators: Illuminates when the adjoining button has been selected.
4. Stop button: Pressing the stop button during dispensing will stop the dispense sequence.
1
4
3
2
OPERATING THE DISPENSER
The NORMAL/PROGRAM/RINSE switch must be in the NORMAL position
1. Place a cup on the drip tray beneath the dispense nozzle.
2. In the area marked “1” of the control panel:
a. Multi-cup only - 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. Press the button to dispense the desired beverage. Dispensing is portion controlled, and will automatically
stop when the correct amount of beverage has been dispensed.
2
11
042319
MODIFYING THE TOUCH SWITCH FUNCTIONS
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
The function of the touch switch can be modified in four different ways:
1. Set for single cup size dispensing.
2. Move any default beverage from one switch location to another.
3. Disable a dispense switch.
4. Create a “custom” beverage.
Single Cup Mode
When the SINGLE cup size beverage mode is selected, the large and small cup size buttons are disabled.
To dispense a beverage, press only the dispense button of the beverage desired. The option to select which
beverage size is used can be done when creating a custom recipe or espresso dispense.
Tip: A display graphic for single cup dispensing is availble for purchase from BUNN.
CREATING A “CUSTOM” BEVERAGE
A “CUSTOM” beverage may be edited/created for any dispense switch location. It is recommended that the touch switch
graphic insert be replaced with one which matches the beverage reassignments made in this mode. All settings can be
adjusted to preference.
Set Espresso Shots
The sub-menus for adjusting an espresso shot are located under this option.
PROGRAM MODE
PRESS TO ENTER
Use to Navigate
STEP 1
• Set the toggle switch to
Program mode.
SM ESP GRIND TIME
(-) #.# sec (+)
STEP 2
• Advance to the Set Espresso
Shots screen.
SM DRY TAMP%
(-) ### (+)
SET ESPRSO SHOTS
EXIT YES
Use to Select
STEP 3
• Press SELECT.
SM PREINFUSION
(-) #.# sec (+)
Use to
Navigate
decrease
STEP 4
Use to
Use to
increase
• Sets the grinder run time for a
small espresso shot.
• Navigate to the next setting.
Use to
decrease
STEP 5
Use to
increase
Use to
Navigate
• Sets the percentage of full
voltage to piston motor for
tamping the dry puck.
• Navigate to the next setting.
12
Use to
Navigate
decrease
STEP 6
Use to
Use to
increase
• Sets the espresso pump
run time for pre-infusion of
tamped coffee. Zero seconds
for no pre-infusion.
• Navigate to the next setting.
042319
SM DWELL TIME
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
(-) #.# sec (+)
SM BREW VOLUME
(-) 95 (+)
LG ESP GRIND TIME
(-) #.# sec (+)
Use to
decrease
STEP 7
Use to
increase
• Sets the dwell time for a
small espresso.
• Navigate to the next setting.
Use to
Navigate
Use to
decrease
STEP 8
• Sets the total brew volume for
a small espresso shot. The
numeric value is flow ticks.
• Navigate to the next setting.
CREATING A “CUSTOM” BEVERAGE
RECIPE SETUP
The sub-menus for adjusting recipes are located under this option.
PROGRAM MODE
PRESS TO ENTER
Use to
increase
Use to Navigate
Use to
Navigate
Use to
Navigate
decrease
STEP 9
Use to
Use to
increase
• The settings will repeat for the
large espresso shot.
RECIPE SETUP
EXIT YES
Use to Select
STEP 1
• Set the toggle switch to
Program mode.
USER SELECT MODE
SINGLE MULTI
Use to
Navigate
STEP 4
• Single mode will only allow
one size beverage. Multi-drink
mode must be selected for
setting up small and large
beverages.
• Navigate to the next setting.
STEP 2
• Advance to the RECIPE
SETUP screen.
SETUP SW 1 RCPE
NO YES
Use to
select.
STEP 5
• You can navigate to
any switch to make a
custom beverage.
• Press SELECT.
Use to
Navigate
STEP 3
• Press SELECT.
SWITCH 1 RECIPE
(-) CUSTOM (+)
Use to
Navigate
STEP 6
• Navigate to CUSTOM.
• Press SELECT.
Use to
select.
13
042319
SW 1 SMALL TIME
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
(-) #.# sec (+)
SW 1 LARGE TIME
(-) #.# sec (+)
ESPRESSO SHOT?
NO YES
Use to
Navigate
decrease
STEP 7
Use to
Use to
increase
• Sets the dispense time for a
small beverage.
• Single cup mode will have
small or large to select from.
• Navigate to the next setting.
1st POWDER/DIL
(-) HPR RIGHT (+)
Use to
select
STEP 10
Use to
select
• Options are any of three
hoppers or dilution. Cannot
choose “NONE”.
• Navigate to the next setting.
Use to
Navigate
Use to
Navigate
decrease
STEP 8
Use to
Use to
increase
• Sets the dispense time for a
Large beverage.
• Single cup mode will have
small or large to select from.
• Navigate to the next setting.
2nd POWDER/DIL
(-) NONE (+)
Use to
select
STEP 11
Use to
select
• Options are any of three hoppers or dilution. “None” can
be selected.
• Navigate to the next setting.
Use to
Navigate
Use to
Navigate
STEP 9
Use to
select
Use to
select
• Does beverage need an
espresso shot? If YES, it will
use the corresponding size
set for single touch or for the
size button selected in Multi.
• Navigate to the next setting.
HOPPER RIGHT STR
(-) 85 (+)
Use to
decrease
STEP 12
• Sets the amount of product
used for the recipe that comes
from the hopper. If a hopper
is not used in the recipe, this
screen will not appear.
• Navigate to the next setting.
Use to
increase
Use to
Navigate
TEST RT HOPPER
PRESS DISPENSE
Use to
Navigate
STEP 13
• This will provide a catch test
to see how much product
dispenses from the hopper.
• Navigate to the next setting.
DISPENSE ORDER
(-) ESP & PWDR (+)
Use to
select
STEP 14
Use to
select
• Choose the order in which the
ingredients dispense.
• Navigate to the next setting.
14
Use to
Navigate
042319
CREATING A “CUSTOM” BEVERAGE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
1. SELECT SIZE
Strength Adjustment
The sub-menus for strength adjustment are located under this option.
STEP 1
• Set the toggle switch to
Program mode.
SM ESP GRIND TIME
(-) #.# sec (+)
Use to
decrease
Use to
increase
Use to
Navigate
PROGRAM MODE
PRESS TO ENTER
Use to Navigate
STEP 2
• Advance to the STRENGTH
ADJUST screen.
TEST SM GRIND TM
PRESS DISPENSE
Use to
Navigate
STRENGTH ADJUST
EXIT YES
Use to Select
STEP 3
• Press SELECT.
LG ESP GRIND TIME
(-) #.# sec (+)
Use to
decrease
Use to
increase
Use to
Navigate
STEP 4
• Sets the grinder run time for
a small espresso shot. This
setting is the same as the one
found in recipe setup.
• Navigate to the next setting.
TEST LG GRIND TM
PRESS DISPENSE
Use to
decrease
STEP 7
Use to
increase
• Press a dispense switch to
perform a catch test for a
large grind.
Use to
Navigate
STEP 5
• Press a dispense switch to
perform a catch test for a
small grind.
• Navigate to the next setting.
STEP 6
• Sets the grinder run time for
a large espresso shot. This
setting is the same as the one
found in recipe setup.
• Navigate to the next setting.
15
042319
DOOR SAFETY INTERLOCK
The dispenser is equipped with a door interlock safety switch,
which prevents the operator from being exposed to the moving
parts of the espresso brewer if the door is open.
The switch may be overridden by a qualified service technician
by inserting the service key, (BUNN PN 51953.0001) into the
opening of the mixing chamber panel, then turn about 15
degrees to position, as shown in Figure 2.
THROUGH COUNTER OPTION
The machine can be setup to dispose of the used coffee
grounds through an opening in the counter, into a waste bin,
for higher waste capacity.
Countertop and Machine Modifications for
Through Counter Waste Option:
1. Use template (Bunn #54427.0000) to locate the cutout
hole in the countertop.
2. Open the front door on Crescendo, and remove the
grounds bin.
3. Remove the two screws that secure the grounds bin
support panel, then remove the panel.
Service Key
Figure 2
Remove grounds bin support panel
4. Remove screw holding the chassis bottom cover, then
remove the cover.
5. Used coffee puck will now fall through the opening in
the chassis.
6. Position the Crescendo so that the opening in the bottom
of the machine coincides with the hole in
the countertop.
7. To direct the brewing waste water through the counter,
disconnect the drain tube from the fitting on the bottom
of the espresso drive.
8. Connect a 5MM ID tube to the drain fitting, and
direct the tube through the opening in the bottom of
the chassis.
Remove the chassis bottom cover
16
Connect a 5MM ID tube to the drain fitting
042319
Software Setup for Through Counter Option:
1. Power the machine.
2. In the PROGRAM mode, use the LARGE cup, (button “A”), to navigate to the “LOCKS/DISABLES” menu.
3. Press the button under “YES” (button “B”) and then the LARGE cup size, (button “A”), until the screen displays the
“PUCK BIN” screen.
4. In the default menu, “YES” will be flashing. Press the button under “NO” to disable the PUCK BIN mode.
5. When “NO” is flashing on the display, press the button under “EXIT” to return to the main screen.
6. Place the NORMAL/PROGRAM/RINSE switch to the NORMAL position.
ENERGY SAVER MODE
In this mode, the machine will operate in a low power mode during off hours to save energy. The display backlight will
be turned off, and the display message will toggle between “Energy Saver/Mode Enabled” and “Change to Normal/Mode
to Clear”. The dispense buttons are disabled so that no beverage dispensing is allowed. The tank refill and powder
(soluble) tank heater are disabled. The espresso tank temperature setting is reduced to 130ºF (54ºC).
To enable the Energy Saver mode:
1. In PROGRAM mode, press the LARGE cup button (button “A”), to navigate to the “LOCKS/DISABLES” menu.
2. Press the button under “YES” (button “B”) and then the LARGE cup size, (button “A”), until the screen displays
“ENERGY SAVER?”.
3. In the default menu, “NO” will be flashing. Press the button under “YES” to enable the Energy Saver mode.
4. When “YES” is flashing on the display, press the button under “EXIT” to return to the main screen.
5. Place the NORMAL/PROGRAM/RINSE switch to the NORMAL position.
To place the unit in the ENERGY SAVER mode:
1. Open the door, and place the NORMAL/PROGRAM/RINSE switch in the RINSE position.
2. After ten minutes with the switch in the RINSE position, the ENERGY SAVER mode will become active.
NOTE: If a rinse cycle has taken place, and the switch is left in the RINSE position, the ENERGY SAVER mode will
become active ten minutes after the rinse cycle was completed. To exit the ENERGY SAVER mode, return the NORMAL/
PROGRAM/RINSE switch to the NORMAL position.
17
042319
GENERAL CLEANING
The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on
Bunn-O-Matic equipment.
Exterior Surfaces:
• Do not use any abrasive materials.
• Use a soft, dry cloth to wipe down the exterior surfaces of the dispenser to maintain the luster of the
stainless steel finish.
• Wash the stainless steel exterior surfaces of the dispenser with warm, soapy water. Rinse with warm,
clear water. If the water is hard, wipe the dispenser dry with a soft cloth to prevent water spotting.
• Stainless steel polish may be used if it is sprayed on a cloth before the cloth is used to wipe down the
exterior surfaces of the dispenser.
DAILY: PARTS WASHING
1. Remove and wash the drip tray and drip tray cover in a mild detergent solution. Rinse thoroughly.
2. Wipe the lower front panel, door, and cabinet with a clean damp cloth.
WEEKLY: PARTS WASHING
1. Remove the elbows and slide gates from all hoppers. Disconnect the elbows from the outlets of both mixing
chambers.
2. Remove the powder mixing chambers, steam traps, frothers and mixing chamber bases.
3. Remove the dispense hoses from the dispense nozzle assembly.
4. Clean all parts removed in warm soapy water. Use Bunn P/N 26367.0000 or 49827.0000 cleaning brush
provided to clean bores and orifices. Rinse in cold water.
5. Prepare one-gallon (3.8 liter) of sanitizing solution with at least 100 ppm of available chlorine in 120°F
(48.9°C) water. Soak all cleaned parts in sanitizing solution for 5 minutes, then allow to air dry.
6. Rinse cleaning brush, dip in sanitizing solution, and brush the bore of both dispense nozzles
NOTE: Repeat this procedure for each nozzle separately.
7. When reassembling parts, be sure to align arrow on frother disk with flat on whipper motor shaft, and rotate
tab on whipper base clock wise to the vertical position to lock mixing chamber.
18
042319
1 x 24h
1. Rinse out Whipper Chambers by placing
the RUN/PROGRAM/RINSE switch in the
RINSE position, then press the button
under RINSE followed by pressing any
beverage dispense button.
2. Push the slide gates on the front of the hopper
elbows inward to close. Remove hoppers, refill
with product, and replace hoppers into dispenser.
3. Empty Drip Tray and wash in a solution of
dish detergent.
7
1 x 7d
5
1. Lave la cámara de batido colocando RUN/PROGRAM/RINSE en la
posición de lavado RINSE, y apretar el botón bajo RINSE. Luego
aprete cualquier botón dispensador de bebida.
2. Empuje la compuerta deslizante frente a los codos de la tolva hacia
adentro para cerrar. Remueva las tolvas, rellene con producto y
vuelva a colocar la tolva en el dispensador.
3. Vacie la bandeja de goteo y limpiela con un detergente liquido
suave no abrasivo.
1
7
6
4
2
3
a. Wash
b. Rinse
a
b
c. Sanitize
d. Dry
a. Lave
b. Enjuague
c. Desinfecte
d. Seque
c
NOTICE
The cleaning instructions noted above are for non-dairy sugar based food products. When dispensing any other food product,
the cleaning cycle for the whipping chamber assembly and ejector elbow must be performed daily.
NOTA:
Las instrucciones de limpieza descritas anteriormente excluyen productos lacteos azucarados. La limpieza de las camaras
de mezcla y de los codos de salida de cada tolva deberá realizarse diariamente.
52564.0000A 12/15 © 2015 BUNN-O-MATIC CORPORATION
19
042319
CLEANING - continued
Every 1000 cycles or weekly: ESPRESSO BREW CHAMBER
1. Remove espresso brew group head, and clean with a brush and
warm water.
2. Remove Sieve Head & Cake Pusher.
3. Clean Sieve Head & Cake Pusher with lukewarm water only, paying special attention to the channels.
4. Insert cleaning brush into each side of the brewer-housing and under lukewarm water, turn the cogs.
20
042319
CLEANING - continued
Every 1000 cycles or weekly: ESPRESSO BREW CHAMBER
5. Re-assemble the brewer, making sure the gear wheels are aligned (open) for sieve head insertion.
6. Re-attach the water inlet hose and place the brewer back in the drive unit.
7. Reconnect outlet hose, slide the red retaining clip to the right until it snaps into lock position.
Water Inlet Hose
21
042319
1. SELECT SIZE
CLEANING - continued
RINSE CYCLE (Required Daily)
1. Open the door and place the NORMAL/PROGRAM/RINSE
switch in the RINSE position.
2. Close door and place a minimum 400ml container under the
dispense nozzles.
3. Press the button under RINSE on the screen.
4. Press any beverage selection button.
5. The dispenser will automatically run hot water through
both soluble mixing chambers, and flush the espresso
brew chamber with hot water.
6. After rinse cycle is complete, discard the rinse water
collected in the container.
7. Open the dispenser door, and place the NORMAL/PROGRAM/
RINSE switch in the NORMAL position.
SELECT MODE
RINSE CLEAN
22
042319
1. SELECT SIZE
2. SELECT BEVERAGE
CLEANING - continued
CLEAN CYCLE - WEEKLY
1. Open the door and place the NORMAL/PROGRAM/RINSE
switch in the RINSE position.
2. Press the button under CLEAN on the screen.
SELECT MODE
RINSE CLEAN
3. When the screen prompts ADD CLEANING TABLET, open
the dispenser door, and drop a cleaning table into the
opening of the espresso brew chamber as shown.
23
ADD CLEANING
TABLET NEXT
Add cleaning
tablet here
042319
CLEANING - CLEAN CYCLE continued
4. Close dispenser door and place a minimum 500ml container
under the dispense nozzles.
5. Press the button under NEXT.
6. When screen displays PRESS DISPENSE TO START, press any
beverage dispense button to begin cleaning cycle.
PRESS DISPENSE
7. During the cleaning cycle, the screen with display CLEANING
CYCLE IN PROGRESS/PRESS TO STOP.
8. When the cleaning cycle is complete, screen will display
SELECT MODE/ RINSE__ CLEAN.
9. Discard the waste water collected from the cleaning cycle.
TO START
CLEANING CYCLE
IN PROGRESS
PRESS ANY BUTTON
TO STOP
SELECT MODE
RINSE CLEAN
10. Open the dispenser door, and place the NORMAL/PROGRAM/
RINSE switch in the NORMAL position.
24
042319
Weekly: Parts Washing and Sanitizing
STEP 1
Remove elbows from all hoppers.
STEP 4
Remove mixing chambers by pulling straight out.
STEP 2
Remove elbows from right & left
mixing chambers, twisting slightly
to help release.
STEP 5
Remove right frother disk from
shaft by pulling straight out.
STEP 3
Rotate tab at bottom of mixing
chamber bases counter clock
wise to release base.
STEP 6
Rotate tab on mixing chamber
base further counter clock wise,
and remover from shaft by pulling
straight out.
NOTE: Ensure O-ring and shaft seal
are in place during re-assembly.
STEP 7 STEP 8 STEP 9
Remove dispense hoses from dispense
nozzle assembly.
Prepare one-gallon (3.8 liter) of sanitizing
solution with at least 100 ppm of available
chlorine in 120°F (48.9°C) water. Soak all
cleaned parts in sanitizing solution for 5
minutes, then allow to air dry.
Rinse cleaning brush, dip in sanitizing
solution, and brush the bore of both
dispense nozzles.
NOTE: Repeat this procedure for
each nozzle separately.
25
When reassembling parts, be sure to
align arrow on frother disk with flat on
whipper motor shaft, and rotate tab on
whipper base clock wise to the vertical
position to lock mixing chamber.
042319
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.
Cycle
Item Part Number
(months)
6 PM KIT, 6 MONTHS CRESCENDO 54866.0000
Qty-2 - Impeller, 4mm
Qty-2 - O-ring, 1.48 ID Blender Base 247 Series
Qty-2 -Gasket, Silicone Blender Base 247 Series
Qty -1- Insert, Wiper Crescendo Espresso Brewer
Qty-1 - Kit, Tube Silicone 6mm ID x 9mm OD 12.0 Inch
Qty -1 - Kit, Tube Silicone 5mm ID x 8mm OD 12.0 inch
12 PM KIT, 12 MONTHS CRESCENDO 54867.0000
Qty-2 - Impeller, 4mm
Qty-2 - O-ring, 1.48 ID Blender Base 247 Series
Qty-2 -Gasket, Silicone Blender Base 247 Series
Qty -1- Insert, Wiper Crescendo Espresso Brewer
Qty-1 - Kit, Tube Silicone 6mm ID x 9mm OD 12.0 Inch
Qty -1 - Kit, Tube Silicone 5mm ID x 8mm OD 12.0 inch
Qty-1, Filter Kit, Crescendo Espresso Brewer
Qty -1, piston Head, Crescendo Espresso Brewer
26
042319
ADJUSTMENTS
Adjustable Variables Used to Create A Perfect Shot of Espresso Topped with Crema:
The primary 2 variables that you mostly will adjust to achieve your ideal double shot espresso pour time will
be the coffee particle size and the dosage targets.
Variables
1. Coffee Particle Size: Adjustable
2. Espresso & Water Dosage: Adjustable (Target 12 grams espresso, 60 ML water for double shot)
3. Dry Tamp Percentage: Factory Default Setting 60 - Adjustable 60-100
4. Espresso Water Temperature: Factory Default Setting 215° F. Adjustable 190°-218°
Brew/Pour Time Target
• 17-23 Seconds Brew Time for Double Shot Espresso
Once the double shot has been calibrated, the grinder coarseness adjustment is complete. The only
adjustment you will need to perform is setting the espresso & water dosage for a single shot espresso.
Single Shot: 7 grams espresso, 30 ML water
NOTE: The brew/pour time will be what it is once the single shot dosage parameters are set.
Procedure Setting the Coffee Grinder Grind Setting:
Do Not change the grind particle size significantly, change coffee coarseness in 1 click (knob) or 1 hashmark
(adjustment screw with lock nut) increments, as it will change the grind rate, thus the amount of coffee
ground and brew/pour time.
Step 1: First, ensure espresso beans are in the hopper. Open the door, and slide the espresso brew group
lock to the left to unlock the brew group. Tip the top of the brew group head towards the front of the machine
to disengage from the espresso drive, then remove brew group from the drive.
Step 2: Enter program mode and scroll to “Strength Adjust” menu. Enter and scroll to “Test LG Grind Time”
menu. Place cup under grinder chute to catch coffee grounds during grind adjustment. Press the espresso
button to start the grinder dispense timer, adjust the grinder adjustment screw while the grinder is operating
until grind particle size is desired or matches a desired grind sample.
Step 3: After setting the grind particle size, tare cup on weigh scale and then place cup under grinder chute
and press the espresso button to start the grinder dispense timer, weigh the dispensed grounds. The target is
12 grams for a double shot espresso. Adjust the grind time and keep repeating the grind throw test until 12
grams is achieved.
Step 4: Next, enter program mode and scroll to “Set Espresso Shots” menu. Select menu and scroll thru sub
menus until “LG Brew Volume” is displayed. Ensure the tic number is set at 190/default.
NOTE: 3.0 tics = 1.0 mil, Default 190 tics divide by 3.0 = 63.33 mils. This is your brew volume target
63.33mils for a double shot. The extra 3.33 mils most likely will be absorbed in the espresso puck resulting
around 60 mils of finished product/double shot.
Step 5: Reinstall the brew group, return switch to the “Normal” position and close door. Make a large
espresso to see if your brew/pour time is within the 17-23 seconds.
NOTE: Anytime you make an adjustment to the coffee coarseness and grind time, a shot must be discarded
between adjustments. If the pour is too slow or too fast, repeat all steps until you are within the 17-23
seconds brew time.
NOTE: Steps 1 thru 3 will take some back and forth adjustments to achieve the target brew time. You should
end up with a dark color espresso, topped with a tan colored foam called crema. The crema may also have a
marble like appearance.
27
042319
ADJUSTMENTS - continued
GRINDER PARTICLE SIZE ADJUSTMENT:
Style: Adjustment Knob
The particle size of the ground coffee can be adjusted for optimal brewing
of the espresso.
NOTE: BUNN recommends to rotate knob in 1 click increments to achieve
desired coarseness.
1. Turn knob counterclockwise to increase the particle size (coarse) of the
ground coffee (see Figure 1.)
2. Turn the knob clockwise to decrease the particle size (fine) of the
ground coffee. CAUTION! If there is ground coffee in the grinder, this
adjustment should only be made while the grinder is running. Use
STRENGTH ADJUST, TEST SM or LG GRIND functions to operate the
grinder for making particle size adjustment.
Style: Grinder Adjustment Screw with Locking Nut
The particle size of the ground coffee can be adjusted for optimal brewing
of the espresso.
Figure 1
The lock nut replaces the grinder knob to prevent tampering of grind
adjustment.
NOTE: BUNN recommends to rotate adjustment screw in 1 hashmark
increments to achieve desired coarseness.
1. The grinder adjustment screw will be set from the factory to an approximate particle size setting for espresso (11 Hashmarks).
2. Loosen locknut and use large flat blade screwdriver to rotate adjustment screw clockwise or counter clockwise to desired particle size, use
screwdriver to hold adjustment screw while tightening lock nut. CAUTION! If there is ground coffee in the grinder, this adjustment should
only be made while the grinder is running. Use STRENGTH ADJUST,
Figure 2
TEST SM or LG GRIND functions to operate the grinder for making
particle size adjustment.
Procedure Setting Grinder Adjustment Screw Back to Factory Setting
The procedure for setting the adjustment screw back to a factory setting after dismantling and cleaning the burrs.
1. Bean hopper removed or chute closed. Place switch in Program position. Go to display screen and scroll to
“Strength Adjust” menu. Enter and scroll to “Test LG Grind Time” menu. Loosen locknut and use large flat blade
screwdriver to rotate adjustment screw. Press the espresso button to start the grinder motor, while the motor is running, slowly rotate the adjustment screw inside the nut clockwise. When a “chirping” sound of the burrs touching is
heard, rotate counter clockwise just until the chirping stops.
2. Reference the adjustment screw slot and mark the burr rotor cap with 0. Then rotate the adjustment screw 11 hashmarks counter clockwise from 0 to set back to a factory setting. Mark the burr rotor cap to indicate 11 hashmark
setting. Holding the screw with the screwdriver, tighten the hex nut. Make sure after tightening nut, the setting is still
lined up at the 11 hashmarks from zero.
28
042319
ADJUSTMENTS - continued
GRINDER THROW WEIGHT ADJUSTMENT:
1. Open the door, and slide the espresso brew group lock to the left to unlock the brew group.
2. Tip the top of the brew group head towards the front of the machine to disengage from the espresso drive,
then remove brew group from the drive.
3. Place the NORMAL/PROGRAM/RINSE switch in the PROGRAM position.
4. Press the Large Cup button to the STRENGTH ADJUST menu, then press the button under YES.
5. Press the Large Cup button to TEST SM GRINDTM.
6. Place a small container on a scale, and tare container.
7. Hold the container under the grinder chute, and press any beverage dispense button.
8. Grinder will run for the time set for a small (single shot) espresso, then stop.
9. Repeat several times, and average the weight.
10. To change the weight, press the Small Cup button to SM ESP GRIND TIME.
11. Us the buttons below the (-) and (+) button to increase or decrease the grind time.
12. Press the Large Cup button to TEST SM GRIND to test new grind time.
13. Press the Large Cup button to TEST LG GRIND to test the large (double shot) grind weight.
14. Press the Small Cup button to LF ESP GRIND TIME to adjust the grind time for a large (double shot)
espresso, if required.
15. After the grind adjustments have been tested and adjusted, place the NORMAL/PROGRAM/RINSE Switch
in the “RUN” position, and exit program mode.
16. Reinstall the espresso group head back onto the espresso drive.
29
042319
DRAINING THE HOT WATER TANKS – to be performed by
qualified service personnel only!
1. Open the door and place the NORMAL/PROGRAM/RINSE
switch in the PROGRAM position.
2. Close the door and place a minimum two liter container
under the dispense nozzles.
3. Press the Large Cup button until the screen reads
DIAGNOSTICS.
4. Press, in sequence, buttons 3, 7, 4 and 1. See diagram below
for button number designations.
5. The screen will display SYSTEM WET TEST. Press the button
under YES.
6. Press the button under COOL ESP TANK.
7. Press the button under START in the COOL ESP TANK screen.
8. The pump will begin running, and hot water will dispense
into the container. After 4 minutes, the pump will
automatically stop.
9. In the ESP TANK COOL? screen, press the button under YES.
NOTE: Dispenser must be disconnected from the power
source in steps 10 through 24.
10. Immediately disconnect the dispenser from the power source,
and water supply.
11. Let the water in the soluble tank cool before draining.
12. Remove left side panel.
13. Pull the drain 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, approximately 6 liter (1.5 gallon).
14. Remove the plug from end of tube.
15. After the tank has drained, replace the plug in the end of
the tube.
16. Remove the tube from the connector in the bottom of the
espresso tank.
17. Swivel the tube towards the outside of the machine.
18. Empty the container used to capture the hot water from the
tank, and place it on the right side of the machine.
19. Insert a 6mm OD tube into the espresso tank fitting, place the
other end into the container.
20. Use a 4mm hex wrench to loosen the plug on the top of the
espresso tank, until the tank begins to drain.
21. After the tank is drained, retighten the plug.
22. Remove the drain tube from the bottom tank fitting.
23. Rotate the fitting towards the inside of the tank. Compressing
the release sleeve on the fitting, fully insert the pump tube.
24. Replace the left and right side panels.
Figure 1
1
3
4
7
Figure 2
30
042319
ELECTRICAL SCHEMATIC
WHT/VIO
1
5
10
10
1
5
15
1
4
1
10
5
1
1
4
1
+V
+V
-V
-V
GND
N/L2
L1
PS-1
POWER SUPPLY
24VDC, 150 WATTS
RED
GRAY
WHT
BLK
15
20
20
10
5
1
BEAN HOPPER
PHOTOSENSOR
10
1
5
1
5
1
5
10
1
5
15
20
10
1
5
RED
GRAY
1
1
RED
RED
1
2
4
3
1
1
RED
BLK
1
CURRENT
SENSOR
1
5
10
15
15 161
5
10
14
PUCK BIN
PROXIMITY
SENSOR
1
1
3
4
2
GRN
S1
S2
S3
S4
M1
REFILL VALVE
POWDER LEFT
POWER RIGHT
HOT WATER
HOPPER MTR LEFT
VIO VIO
ORN
YEL
WHT/GRN
RED
L1
BL/BK-16 WHT-16
N/L2
RED
RED
RED
BLK-16
J1
WHT/BLK
BLK
t-2
PNK
PROBE
LCD-1
LCD DISPLAY
50632.0000
MAIN CBA
GRN or GRN/YEL
K3
HEATER
SWITCHING
RELAY
RED
ORN
BLU
RED
GRN
ORN
BLU
WHT
WHT
BLK-16 WHT-16
K3
HEATER
SWITCHING
RELAY
H1 - POWDER TANK
H2-ESPRESSO TANK
WHT
WHT
t-1
ESP TANK
POWDER
TANK
NORMAL
PROGRAM
RINSE
BLK-16
BLU/BLK-16
WHT/YEL
YEL
WHT/GRN
WHT/GRN
YEL
WHT/YEL
M8
GRINDER
WHT
M3
HOPPER MTR RIGHT
S5
ESPRESSO WATER
K1
GRINDER RELAY
K2
PUMP RELAY
S6
SOLENOID PUMP
WHT
K3
HEATER SWITCHING
RELAY
FLW
FLOW
METER
K1
GRINDER
RELAY
K2
PUMP
RELAY
WHT
K4
HEATER
RELAY
SSR
K4
HEATER RELAY SSR
BG-1
ELDOM
ESPRESSO
GROUP HEAD
CSW-1
CAPACITIVE
TOUCH SWITCH
RED
RED
RED
RED
RED
RED
BLK-16
BLK BLK
BRN-16
M7
SOLUBLE FAN
RED
SW1
MASTER
ON/OFF
LT1
LT1
LT1
LT1
SW3
GRINDER
INTERRUPT
SWITCH
SW4
M2
HOPPER MTR MIDDLE
SW5
BLK
WHT
RED
GRN
BRN
BLU
ORN
YEL
VIO
GRAY
J18
J15
J17
J5
J24
J9
BLK
WHT
RED
GRN
BRN
BLU
ORN
YEL
VIO
GRAY
J26
RED
BLU
RED/BLK
BRN/WHT
RED
BRN/BLK
BLU/BLK
WHT/YEL
RED
WHT/VIO
WHT/RED
WHT/RED
WHT/GRN
RED
WHT/BLU
WHT/ORN
WHT/VIO
RED
GRN
BLK
WHT
GRAY
BLK
WHT/BLK
BLK
WHT/VIO
WHT/VIO
WHT/BLU
WHT/BLU
ORG
YEL
BLU
RED/BLK
BRN/WHT
BRN/BLK
BLU/BLK
WHT/YEL
WHT/GRN
BLK
RED
RED
RED
WHT/BLU
WHT/ORN
WHT/VIO
RED
GRN
BLK
GRN
SW2
DOOR
INTERRUPT
SWITCH
RED
BLK
YEL/GRN
M4
LEFT WHIPPER MOTOR
RED
WHT/BLK
M5
RIGHT WHIPPER MOTOR
RED
WHT/RED
RED
WHT/BLK
WHT/RED
RED
GRN
J23
BRN
BLK
BRN
BLK
J14
H11
CN1
GRN
BRN
ORN
YEL
BLU
VIO
GRAY
BLK
TAN
WHT
RED/BLK
PINK
WHT/BLK
WHT/RED
WHT/ORN
RED
GRN
BRN
ORN
YEL
BLU
VIO
GRAY
BLK
TAN
WHT
RED/BLK
PINK
WHT/BLK
W/R
W/O
WHT-16
WHT-16
BRN
BLU
BLK
BRN
BLU
BLU
BRN/BLK
MOTOR
CAPACITOR
BRN
BLU
CUP
LED
Artwork for P/N:54323.0000
Revision: B
Version: 01
Drawn: KJO
Date: 09/10/18
Colors:
Black
WHT/YEL
SW4
NORMAL
WHT/GRN
PROGRAM
RINSE
YEL
SW5
BEAN HOPPER
PHOTOSENSOR
LEFT WHIPPER MOTOR
1
GRN
HOPPER MTR LEFT
RED
M1
HOPPER MTR MIDDLE
RED
M2
HOPPER MTR RIGHT
RED
M3
RED
M4
RIGHT WHIPPER MOTOR
RED
M5
WHT/BLK
WHT/RED
WHT/BLU
WHT/ORN
WHT/VIO
PUCK BIN
PROXIMITY
SENSOR
© BUNN-O-Matic Corporation
WHT/YEL
YEL
WHT/GRN
WHT/BLU
WHT/BLU
RED
WHT/RED
WHT/GRN
SW2
DOOR
INTERRUPT
SWITCH
RED
RED
RED
WHT/BLU
WHT/ORN
WHT/VIO
WHT/BLK
WHT/RED
RED
WHT/VIO
1
t-1
t-2
WHT/YEL
POWDER
TANK
BRN
BLK
REFILL VALVE
RED
S1
POWDER LEFT
ORG
POWER RIGHT
YEL
HOT WATER
WHT/GRN
ESPRESSO WATER
BLU
GRINDER RELAY
RED/BLK
PUMP RELAY
BRN/WHT
HEATER SWITCHING
RELAY
BRN/BLK
HEATER RELAY SSR
BLU/BLK
SOLUBLE FAN
BLK
RED
RED
1
FLOW
METER
1
RED
BLK
S2
S3
S4
S5
GRN
K1
K2
K3
K4
4
3
M7
PROBE
CUP
LED
J14
RED
ORN
BLU
WHT
H11
CN1
GRN
BRN
ORN
1
1
4
RED
RED
RED
RED
RED
RED
GRINDER
RELAY
RED
RED
1
BRN
LCD-1
LCD DISPLAY
14
10
YEL
TAN
WHT
BRN
GRN
ORN
PINK
RED/BLK
YEL
BLU
VIO
GRAY
BLK
TAN
WHT
RED/BLK
10
5
CSW-1
CAPACITIVE
TOUCH SWITCH
BLU/BLK-16
K3
HEATER
BLK-16
BRN-16
SWITCHING
2
1
RELAY
K4
HEATER
RELAY
SSR
BLK
K1
BLK BLK
BLK
5
15 161
VIO
BLU
BLK
W/R
W/O
GRAY
WHT/BLK
PINK
WHT/BLK
WHT/RED
WHT/ORN
RED
15
BLK-16
K3
HEATER
SWITCHING
RELAY
WHT/VIO
H1 - POWDER TANK
LT1
BL/BK-16 WHT-16
H2-ESPRESSO TANK
LT1
BLK-16 WHT-16
1
BRN
BLK
SW3
GRINDER
INTERRUPT
SWITCH
K2
PUMP
RELAY
RED
+V
+V
GRAY
-V
-V
GRN
GND
WHT
N/L2
BLK
L1
3
BRN
BRN/BLK
BLU
BLU
4
BRN
MOTOR
CAPACITOR
SOLENOID PUMP
WHT/RED
S6
PS-1
POWER SUPPLY
24VDC, 150 WATTS
Artwork for P/N:54323.0000
Revision: B
Version: 01
Drawn: KJO
Date: 09/10/18
Colors:
J18
RED
1
VIO VIO
ORN
YEL
WHT/GRN
5
BLU
RED/BLK
10
BRN/WHT
RED
RED
BRN/BLK
BLU/BLK
15
20
WHT/YEL
J26
RED
1
RED
5
BLK
10
GRAY
J1
PNK
1
GRN
RED
GRN
BLK
5
10
WHT
GRAY
15
BLK
WHT/BLK
20
J15
RED
1
ORN
BLU
WHT
4
GRN
BLK
FLW
RED
1
ESP TANK
WHT
WHT
WHT/BLK
BLK
1
CURRENT
J17
1
5
10
J5
1
5
50632.0000
MAIN CBA
J24
1
5
J9
1
5
10
15
20
1
J23
BLK
WHT
RED
1
BLK
WHT
RED
1
BG-1
ELDOM
ESPRESSO
GROUP HEAD
SENSOR
10
5
GRN
BRN
BLU
ORN
YEL
VIO
GRAY
GRN
BRN
BLU
ORN
YEL
VIO
GRAY
10
5
L1
N/L2
GRN or GRN/YEL
SW1
MASTER
ON/OFF
BLK-16
LT1
WHT-16
LT1
WHT-16
2
WHT
BLU
M8
YEL/GRN
BLU
GRINDER
WHT
WHT
Black
CRESCENDO
SCHEMATIC
120 VOLTS AC-2WIRE
SINGLE PHASE, 60HZ
OR
220-240 VOLTS AC-2WIRE
SINGLE PHASE, 50/60HZ
54323.0000 B 08/24/2018 © BUNN-O-Matic Corporation
31
042319
WHT/VIO
ELECTRICAL SCHEMATIC
1
5
10
10
1
5
15
1
4
1
10
5
1
1
4
1
+V
+V
-V
-V
GND
N/L2
L1
PS-1
POWER SUPPLY
24VDC, 150 WATTS
RED
GRAY
WHT
BLK
15
20
20
10
5
1
BEAN HOPPER
PHOTOSENSOR
10
1
5
1
5
1
5
10
1
5
15
20
10
1
5
RED
GRAY
1
1
RED
RED
1
2
4
3
1
1
RED
BLK
1
CURRENT
SENSOR
1
5
10
15
15 161
5
10
14
PUCK BIN
PROXIMITY
SENSOR
1
1
3
4
2
GRN
S1
S2
S3
S4
M1
REFILL VALVE
POWDER LEFT
POWER RIGHT
HOT WATER
HOPPER MTR LEFT
VIO VIO
ORN
YEL
WHT/GRN
RED
L1 L2
BL/BK-16 RED-16
N
RED
RED
RED
BLK-16
J1
WHT/BLK
BLK
t-2
PNK
PROBE
LCD-1
LCD DISPLAY
50632.0000
MAIN CBA
GRN
K3
HEATER
SWITCHING
RELAY
RED
ORN
BLU
RED
GRN
ORN
BLU
WHT
WHT
BLK-16 RED-16
K3
HEATER
SWITCHING
RELAY
H1 - POWDER TANK
H2-ESPRESSO TANK
WHT
WHT
t-1
ESP TANK
POWDER
TANK
NORMAL
PROGRAM
RINSE
BLK-16
BLU/BLK-16
WHT/YEL
YEL
WHT/GRN
WHT/GRN
YEL
WHT/YEL
M8
GRINDER
WHT
M3
HOPPER MTR RIGHT
S5
ESPRESSO WATER
K1
GRINDER RELAY
K2
PUMP RELAY
S6
SOLENOID PUMP
WHT
K3
HEATER SWITCHING
RELAY
FLW
FLOW
METER
K1
GRINDER
RELAY
K2
PUMP
RELAY
WHT
K4
HEATER
RELAY
SSR
K4
HEATER RELAY SSR
BG-1
ELDOM
ESPRESSO
GROUP HEAD
CSW-1
CAPACITIVE
TOUCH SWITCH
RED
RED
RED
RED
RED
RED
BLK-16
BLK BLK
BRN-16
M7
SOLUBLE FAN
RED
SW1
MASTER
ON/OFF
LT1
LT1
LT1
LT1
SW3
GRINDER
INTERRUPT
SWITCH
SW4
M2
HOPPER MTR MIDDLE
SW5
BLK
WHT
RED
GRN
BRN
BLU
ORN
YEL
VIO
GRAY
J18
J15
J17
J5
J24
J9
BLK
WHT
RED
GRN
BRN
BLU
ORN
YEL
VIO
GRAY
J26
RED
BLU
RED/BLK
BRN/WHT
RED
BRN/BLK
BLU/BLK
WHT/YEL
RED
WHT/VIO
WHT/RED
WHT/RED
WHT/GRN
RED
WHT/BLU
WHT/ORN
WHT/VIO
RED
GRN
BLK
WHT
GRAY
BLK
WHT/BLK
BLK
WHT/VIO
WHT/VIO
WHT/BLU
WHT/BLU
ORG
YEL
BLU
RED/BLK
BRN/WHT
BRN/BLK
BLU/BLK
WHT/YEL
WHT/GRN
BLK
RED
RED
RED
WHT/BLU
WHT/ORN
WHT/VIO
RED
GRN
BLK
GRN
SW2
DOOR
INTERRUPT
SWITCH
RED
BLK
YEL/GRN
M4
LEFT WHIPPER MOTOR
RED
WHT/BLK
M5
RIGHT WHIPPER MOTOR
RED
WHT/RED
RED
WHT/BLK
WHT/RED
RED
GRN
J23
BRN
BLK
BRN
BLK
J14
H11
CN1
GRN
BRN
ORN
YEL
BLU
VIO
GRAY
BLK
TAN
WHT
RED/BLK
PINK
WHT/BLK
WHT/RED
WHT/ORN
RED
GRN
BRN
ORN
YEL
BLU
VIO
GRAY
BLK
TAN
WHT
RED/BLK
PINK
WHT/BLK
W/R
W/O
BL/BK-16
BL/BK-16
BRN
BLU
BLK
BRN
BLU
BLU
BRN/BLK
MOTOR
CAPACITOR
BRN
BLU
CUP
LED
Artwork for P/N:54323.0001
Revision: A
Version: 00
Drawn: KJO
Date: 08/24/18
Colors:
Black
SW2
DOOR
INTERRUPT
SWITCH
J17
WHT/YEL
1
YEL
WHT/GRN
5
WHT/BLU
10
WHT/BLU
J5
WHT/RED
1
WHT/GRN
5
J24
RED
1
RED
5
J9
RED
1
WHT/BLU
WHT/ORN
WHT/VIO
WHT/BLK
5
WHT/RED
RED
10
15
20
WHT/YEL
SW4
NORMAL
WHT/GRN
PROGRAM
RINSE
YEL
SW5
BEAN HOPPER
PHOTOSENSOR
LEFT WHIPPER MOTOR
HOPPER MTR LEFT
RED
M1
HOPPER MTR MIDDLE
RED
M2
HOPPER MTR RIGHT
RED
M3
RED
M4
RIGHT WHIPPER MOTOR
RED
M5
1
GRN
WHT/BLU
WHT/ORN
WHT/VIO
WHT/BLK
WHT/RED
PUCK BIN
PROXIMITY
SENSOR
© BUNN-O-Matic Corporation
RED
50632.0000
MAIN CBA
1
J23
BLK
WHT
RED
GRN
1
BLK
WHT
RED
GRN
1
BG-1
ELDOM
ESPRESSO
GROUP HEAD
5
BRN
BLU
ORN
YEL
BRN
BLU
ORN
YEL
5
WHT/VIO
1
J18
RED
1
VIO VIO
ORN
YEL
WHT/GRN
5
BLU
RED/BLK
10
BRN/WHT
RED
RED
BRN/BLK
BLU/BLK
15
20
WHT/YEL
J26
RED
1
RED
5
BLK
10
10
15
20
GRAY
J1
PNK
1
GRN
RED
GRN
GRN
BLK
WHT
GRAY
BLK
WHT/BLK
RED
ORN
BLU
WHT
BLK
FLW
RED
1
ESP TANK
WHT
WHT
WHT/BLK
BLK
1
5
J15
1
4
CURRENT
SENSOR
10
VIO
GRAY
VIO
GRAY
10
REFILL VALVE
RED
S1
POWDER LEFT
ORG
POWER RIGHT
YEL
HOT WATER
WHT/GRN
ESPRESSO WATER
BLU
GRINDER RELAY
RED/BLK
PUMP RELAY
BRN/WHT
HEATER SWITCHING
RELAY
BRN/BLK
HEATER RELAY SSR
BLU/BLK
WHT/YEL
BLK
RED
RED
1
FLOW
METER
t-1
POWDER
TANK
t-2
1
BRN
RED
BLK
BLK
4
SOLUBLE FAN
PROBE
RED
ORN
BLU
WHT
S2
S3
S4
S5
K1
K2
K3
K4
M7
CUP
LED
J14
H11
RED
RED
RED
RED
GRN
RED
RED
RED
RED
3
14
CN1
GRN
GRN
BRN
ORN
YEL
1
1
CSW-1
4
CAPACITIVE
TOUCH SWITCH
1
LCD-1
LCD DISPLAY
10
YEL
TAN
WHT
BRN
ORN
PINK
RED/BLK
BLU
VIO
GRAY
BLK
TAN
WHT
RED/BLK
10
5
BLU/BLK-16
K3
HEATER
BLK-16
BRN-16
SWITCHING
2
1
RELAY
K4
HEATER
RELAY
SSR
K3
HEATER
SWITCHING
RELAY
WHT/VIO
BLK BLK
15 161
BLK
W/O
K1
GRINDER
RELAY
BRN
BLU
PINK
BLK
5
WHT/BLK
WHT/BLK
BLK
VIO
WHT/RED
W/R
WHT/ORN
15
GRAY
RED
LT1
BL/BK-16 RED-16
LT1
BLK-16
BLK-16 RED-16
1
BLK
SW3
GRINDER
INTERRUPT
SWITCH
BRN
K2
PUMP
RELAY
RED
GRAY
GRN
WHT
BLK
H1 - POWDER TANK
H2-ESPRESSO TANK
3
BRN/BLK
BLU
4
MOTOR
CAPACITOR
SOLENOID PUMP
WHT/RED
S6
+V
+V
-V
PS-1
-V
POWER SUPPLY
GND
24VDC, 150 WATTS
N/L2
L1
L1 L2
N
SW1
MASTER
ON/OFF
BLK-16
LT1
BL/BK-16
LT1
BL/BK-16
BRN
BLU
2
WHT
BLU
BRN
M8
YEL/GRN
BLU
GRINDER
WHT
WHT
Artwork for P/N:54323.0001
Revision: A
Version: 00
Drawn: KJO
Date: 08/24/18
Colors:
Black
GRN
CRESCENDO
SCHEMATIC
120/208 - 240 VOLTS AC-3WIRE
SINGLE PHASE, 60HZ
54323.0001 A 08/24/2018 © BUNN-O-Matic Corporation
32
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