INSTALLATION & OPERATING GUIDE
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
52373.0001A 05/25 ©2025 Bunn-O-Matic Corporation
BUNN refresh
®
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.
2
52373.0 103015
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) All coffee and tea dispensers/servers, MCR/MCP/MCA single cup brewers, and BUNNlink
®
electronic circuit and/or
control boards – 1 year parts and 1 year labor.
2) Product-specific warranties for Premia
™
,Crescendo
®
, Fast Cup
®
, Sure Immersion
®
, Sure Tamp
®
and others – 1 year
parts and 1 year labor. Please visit commercial.bunn.com/support/warranty-lookup for further details.
3) 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 for 4 years or 40,000 pounds of coffee, whichever comes first.
4) For customers subscribed to BUNNlink
®
, BUNN reserves the right to periodically auto-push critical software
updates that will enhance functionality or performance of the BUNN equipment, unless the customer requests
advance notice of such software updates from BUNN in writing.
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 wear with 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.
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
3
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec-
tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels.
27442.0000
00986.0002
33461.0013
Artwork for P/N: 00986.0002
Revision: M
Version: 01
Drawn: CAS
Date: 10/30/14
Colors:
Dielines
PANTONE 152 C (Safety Orange)
PANTONE Process Black C
00986.0002 M
WARNING
FAILURE TO COMPLY RISKS EQUIPMENT
DAMAGE, FIRE OR SHOCK HAZARD.
READ THE ENTIRE OPERATING MANUAL
BEFORE USING THIS PRODUCT
00986.0002M 10/14 ©1994 Bunn-O-Matic Corporation
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.
CONTENTS
Warranty ........................................................................................................................ 2
User Notices .................................................................................................................. 3
Initial Set-Up & Electrical Requirements ........................................................................ 4
CE Requirements ........................................................................................................... 4
Plumbing Requirements ................................................................................................ 5
Plumbing Hookup .......................................................................................................... 5
Carbon Dioxide Hookup ................................................................................................. 5
Filling the Water Bath ..................................................................................................... 6
Purging the Water Lines ................................................................................................ 6
Changing Water Filter Cartridge Warning ....................................................................... 7
Dispenser Use ................................................................................................................ 7
Cleaning & Preventative Maintenance ............................................................................ 7
Electrical Wiring Schematic Diagram ............................................................................. 8
Function Indicators ........................................................................................................ 9
Plumbing Schematic Diagram ..................................................................................... 10
Coolant Schematic Diagram ......................................................................................... 11
Pictorial Installation ..................................................................................................... 12
00656.0001
52373.0 092216
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 Plumb-
ing /Sanitation Code for your area.
Artwork for P/N: 00656.0001
Artwork Rev: A
Drawn: REF
Date: 04/22/10
41509.0008
COMPRESSOR
ON OFF
41509.0001
Artwork for P/N: 41509.0001
Revision: A
Version: 00
Drawn: CAS
Date: 02/18/14
Colors:
Dielines
PANTONE Process Black C
41509.0001
41509.0002
41509.0003
41509.0004
Artwork for P/N: 33461.0013
Revision: A
Version: 00
Drawn: CAS
Date: 09/22/17
Colors:
Dielines
PANTONE Black C
DISPENSE
ON OFF
41509.0002
Artwork for P/N: 41509.0002
Revision: A
Version: 00
Drawn: CAS
Date: 02/18/14
Colors:
Dielines
PANTONE Process Black C
WATER FILTER
RESET
41509.0003
Artwork for P/N: 41509.0003
Revision: A
Version: 00
Drawn: CAS
Date: 02/18/14
Colors:
Dielines
PANTONE Process Black C
PROGRAM
MODE
41509.0004 A
Artwork for P/N: 41509.0004
Revision: A
Version: 00
Drawn: CAS
Date: 07/16/15
Colors:
Dielines
PANTONE Process Black C
Artwork for P/N: 41509.0008
Revision: A
Version: 00
Drawn: BDK
Date: 04/29/25
Colors:
WHITE
Dielines
PANTONE Process Black C
SET CO
2
PRESSURE
120 PSIG
41509.0008 A
4
INITIAL SET-UP
CAUTION: The dispenser is very heavy! Use care when lifting or moving it. Use at least two people to lift or move the
dispenser. Place dispenser on a sturdy counter or shelf able to support at least 125 lbs. (57 kg).
The dispenser is designed for indoor use only, in ambient temperatures ranging from 50°F to 90°F (10°C to 32°C). Avoid
locating the machine where it will be subject to direct sunlight or exposed to other external heat sources. Allow a minimum
clearance of 6” at the back and top of the dispenser, and a minimum of 4” at either side of the dispenser for proper air
circulation. Leave some space so the dispenser can be moved for cleaning.
ELECTRICAL REQUIREMENTS
CAUTION: The dispenser must be disconnected from the power source until specified in Electrical Hook-Up.
The 120V rated dispensers have an attached cord set and require a 2-wire, grounded, individual branch circuit rated
120 volts AC, 15 amp, single phase, 60Hz. The mating connector must be a NEMA 5-15R.
Refer to the data plate for exact electrical 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. Confirm that the compressor switch and the dispense switch are in the OFF position
(see Figure 1).
4. Connect the dispenser to the power source.
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.
Figure 1
P4373
52373.0 103015
5
PLUMBING REQUIREMENTS
The dispenser must be connected to a COLD WATER system with
an operating pressure between 30 and 100 psig (.207 and .690 mPa).
This water source must be capable of producing a minimum flow rate
of 3 fluid ounces (88.7 milliliters) per second. A shut off valve should
be installed in the line that will supply the dispenser. A water filter has
been included with the dispenser. The water filter should be installed
as close as possible to the inlet of the machine, but downstream
of the shut off valve (see Figure 2). The new water filter should be
flushed with at least five gallons of water before hooking it up to the
dispenser. The main water inlet is a 3/8” (9.52 mm) MFL connection.
NOTE- At least 18 inches (457 mm) of an FDA approved flexible bev-
erage tubing, such as reinforced braided polyethylene, before the
dispenser will facilitate movement to clean the counter top. It can be
purchased direct from BUNN-O-MATIC (part number 45848.10__
[see Illustrated Parts Catalog for complete part number.])
BUNN-O-MATIC does not recommend the use of saddle valves to
install the dispenser. The size and shape of the hole(s) made in the
supply line(s) by saddle valves 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 back flow 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.
PLUMBING HOOK-UP
The plumbing connection is a 3/8” male flare adapter located on the rear of the water dispenser
(Figure 3).
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.
CARBON DIOXIDE HOOK-UP
The dispenser will need to be connected to an external CO
2
source. An external CO
2
pressure regulator will need to be installed in the supply line to the dispenser. The
external CO
2
supply connection is a ¼” MFL (Figure 4) located on the back of the
machine.
Figure 2
P4372
Figure 3
Figure 4
52373.0 103015
6
PURGING THE WATER LINES (PUSH & HOLD VERSION)
1. Insure that the dispense switch is ON.
2. Dispense water from the STILL WATER lines until the cloudy appearance dissipates and the water flows clear. Next,
dispense water from the SPARKLING WATER lines until again the cloudy appearance dissipates and the water flows
clear.
3. Open the external CO
2
supply line. Set the external CO
2
pressure regulator to 120 psig (.827 mPa).
4. Dispense sparkling water until carbonation appears.
5. The machine is now ready for use.
FILLING THE WATER BATH
1. Plug the dispenser into an electrical outlet and turn on the water supply to the dispenser.
2. Flip the dispense switch to ON. The water bath will begin to fill. The water bath will fill and
automatically shut off when the water bath is full.
3. Check the sight glass to confirm that the water bath is full (See Figure 5).
Once the water bath is full, flip the compressor switch to ON. It will take several hours to create
the ice bank required for full dispenser performance, but there will be chilled water in one to two
hours. During this time, some further trickling from the water bath into the drip tray is expected
due to expansion caused by the ice bank formation.
Figure 5
PURGING THE WATER LINES (PORTION CONTROL VERSION)
1. Insure that the dispense switch is ON.
2. Dispense water from the STILL WATER lines by pressing & holding the "+" button (Figure 6),till the
cloudy appearance dissipates and the water flows clear.
3. Dispense water from the SPARKLING WATER lines by pressing & holding the "+" button (Figure 7), till
the cloudy appearance dissipates and the water flows clear.
4. Open the external CO
2
supply line. Set the external CO
2
pressure regulator to 120 psig (.827 mPa).
5. Dispense sparkling water until carbonation appears.
6. The machine is now ready for use.
Figure 6
Figure 7
52373.0 103015
7
DISPENSER USE
Press and Hold Dispensing:
1. Place a container beneath the dispensing nozzle.
2. Press and hold either the “still” water switch or the “sparkling” water switch until the beverage reaches the desired
level, then release.
Portion Control Dispensing:
The portion sizes are preset but can be changed as follows:
1. Set the program switch to the ON position.
2. Press and hold the large and medium buttons on the left (STILL WATER) until you hear the machine “beeps” three
times.
3. Place a container beneath the dispensing nozzle then press and hold the appropriate dispense switch until the
desired amount has been dispensed. The machine will record the amount of time that the button is pressed continu-
ously. If the button is released too soon, simply empty the container and start over.
4. Repeat step 3 for each of the dispense switches as desired.
5. Turn the program switch to the OFF position.
CHANGE WATER FILTER CARTRIDGE WARNING
The water filter cartridge will need to be changed after 4,500 gallons of use. When the water usage gets close to 4,500
gallons, the blue LED will flash slowly to indicate that it is nearly time to replace the water filter cartridge. When the
water usage exceeds 4,500 gallons, the blue LED will flash rapidly to indicate that it is time to replace the water filter
cartridge. Once the water filter cartridge has been replaced, push and hold the water filter reset switch for 3 seconds to
clear the warning.
CHANGING THE WATER FILTER CARTRIDGE:
1. To change the water filter cartridge, shut off the water supply line and remove the water supply line at the dispenser.
2. Turn the water filter cartridge counterclockwise to remove it from its mounting bracket.
3. Install the new water filter cartridge into the mounting bracket by turning it clockwise until it is tight.
4. The new water filter cartridge should be flushed with at least five gallons of water before re-connecting the water
supply line at the dispenser.
CLEANING & PREVENTIVE MAINTENANCE
Daily:
1. Wipe splash panel, areas around dispense nozzle with a clean, damp cloth.
2. Wipe external surfaces with a clean, damp cloth.
Monthly: Clean Condenser Coils and Air Filter:
1. Removable air filter can be cleaned in warm soapy water.
2. Use a soft bristle brush to clean the build up of dirt in the condenser.
52373.0 103015
8
J6-1
J11-1
J11-5
J6-1
J6-5
J6-3
CONTROL
P
C
BOARD
J5-1
J5-4
J2-1
J2-6
GRN
RECIR.
PUMP
BRN
WHI
BLK
J1-1
J1-5
WHT
J15-1
WHI/BLK
WHT/VIO
WHT/ORN
YEL
BLU
WHT BLK
YEL
WHT/BLU
BLU
BLK
RED
BLU
YEL
ORN
MOTOR
CONDENSOR FAN
RED/BLKBLU/BLK
BLU/BLK
J15-4
J9-1
J9-2
AUXILLARY
CONTROL BOARD
t
ORN
WHT
WATER BATH
THERMISTOR
WHT WHT
WHT
BLK
BLU/BLK
BLK
ORN
WHT
GRN
BLK
REFRIGERATION
SWITCH
K1
WATER INLET
VALVE
BRN WHT
SOL
BLK
TRANSFORMER
WHT
BLU
WHT/BLU
L
O
A
D
L
I
N
E
WHT
WHT/BLK
K1
120V
N
A B
A B
L1
120 VOLTS AC
SINGLE PHASE
J1-1
J1-3
J5-1
J5-5
J4-1
J4-5
J3-1
J3-5
J2-1
J2-5
Membrane Switches - DOOR ASSY
STATIC
SHIELD
STILL WATER
STOP/PLUS
LARGE
MEDIUM
SMALL
STATIC
SHIELD
SPARKLING WATER
STILL WATERSPARKLING WATER
STOP/PLUS
LARGE
MEDIUM
SMALL
DISPENSE
STATIC
SHIELD
DISPENSE
STATIC
SHIELD
BLU
TAN
ORG
BLK
BLK
ORG
DISPENSE
SWITCH
J12-1
J12-3
WHT/BLU
BLU
START
RUN
COMPRESSOR ASSY
LIMIT
THERM.
COMPRESSOR
MOTOR
3
PTC
ASSY
4
56
2
1
N
GRN
J14-1
J14-2
Chassis
Ground
WATER
PUMP
PUMP
RELAY
K2
PUMP
RELAY
K3
WHT
BLKBLK
STILL WATER VALVE
K2
SPARKLING
WATER VALVE
K3
YELYEL
YEL
YEL
YEL
WHT/VIO
WHT/ORNYEL
RED
BLK
LIQUID
LEVEL
FLOAT
SWITCH
WATER
FILTER
RESET
SWITCH
PROGRAM
SWITCH
SOL
J13-1
J13-6
BATH FILL VALVE
GRN
RED
DISPENSE/ALARM LED
Chassis
Ground
Door
Ground
SOL
SOL
GRN & WHT
RED RED
1 2
BLK
RED
1 2
GRN
GRN
WHT
BLK
RED/BLK
4 1
Portion Control Option
Push and Hold Option
1.25A
Fuse
ELECTRICAL WIRING SCHEMATIC DIAGRAM
52373.0 103015
9
FUNCTION INDICATORS
LED # LED Color Function/Description
1 Red - On Indicates that the bath temperature is above 34˚ F.
The compressor is in a 6 minute delay period when slowly flashing.
When the bath thermistor circuit is open, the LED’s (1 & 2) will flash
one time every three seconds. The compressor will not run under
this condition.
Red - Flashing1
Red - Flashing2
When the bath thermistor circuit is shorted, the LED’s (1 & 2) will
flash two times every three seconds. The compressor will not run
under this condition.
Red - Flashing2
Indicates the bath temperature is below 34˚ F.
Green - On2
Indicates the compressor should be ON.
Green - On3
Circuit Board LED Indicators
Function/Description
Blue - Flashing The dispense Blue LED will flashing three times every three seconds,
Indicates a bath fill error. The error occurs when the water bath fill
does not fill within four minutes.
Dispense LED Indicator
Blue - Flashing A slowly flashing dispense Blue LED indicates a water filter cartridge
warning. This means it is nearly time to replace the water cartridge.
Blue - Flashing A rapidly flashing dispense Blue LED indicates the water filter
cartridge must be replaced.
52373.0 080216
1
2
3
10
PLUMBING SCHEMATIC DIAGRAM
WATER
SUPPLY
INLET WATER
SOLENOID
WATER PRESSURE
BOOSTER PUMP
WATER PRESSURE
REGULATOR
DOUBLE CHECK
VENT TO ATMOSPHERE
WATER BATH
FILL SOLENOID
WATER BATH
PRODUCT
COIL
RECIRC CONDUIT
RECIRC PUMP
RECIRC LOOP
RECIRC LOOP
CO2
SUPPLY
PRIMARY
CO2 PRESSURE
REGULATOR
CO2 FITTING
SECONDARY
CO2 PRESSURE
REGULATOR
CO2
CHECK
VALVE
WATER
CHECK
VALVE
CARBONATOR
SPARKLING WATER
FLOW VALVE
SPARKLING WATER
SOLENOID VALVE
STILL WATER
FLOW VALVE
STILLWATER
SOLENOID VALVE
FLOW
LAMINATOR
NOZZLE
EXTERNAL
INTERNAL
52373.0 103015
11
COOLANT SCHEMATIC DIAGRAM
CONDENSER
SUCTION
ACCUMULATOR
COMPRESSOR
EVAPORATOR
PROCESS TUBE
33464.0000A 09/00 ©2000 Bunn-O-Matic Corporation
FILTER
DRYER
52373.0 103015
12
52373.0 072016
BUNN refresh Install Pictorial
CO
2
Supply
Set at 120psig
Main On/Off
Water Valve
Water Filter
120 Volt Plug
2-gauge Pressure
Regulator Kit
(Sold Separately)
Operating
Water
Pressure
Min. 30 psi
Max. 100 psi
Can be free-standing,
mounted on a wall, or
under a cabinet.
3/8” Tube Required
1/4” Tube Included
w/Regulator Kit
6’ Power Cord
Electrical Outlet
120V 15A 60Hz
10-15-20lb CO
2
Cylinder
(Customer Supplied)
1/4” CO
2
Inlet
3/8” Water Inlet
Electrical
• The 120V rated dispensers have an attached cord set and require a 2-wire, grounded, individual branch circuit
rated 120VAC, 15A, single phase, 60Hz. The mating connector must be a NEMA 5-15R.
Plumbing
• Cold water with an operating pressure between 30 - 100 psig.
• Minimum flow rate 3.0 fluid ounces per second.
• Dispenser water connection is a 3/8” male flare adapter fitting with gasket.
Water Filter
• Water filter fittings are 3/8“ hose barb to MPT.
• Minimum 5 gallon purge before final connection to the dispenser.
• Filter cartridge replaced every 4500 gallons or semi-annually. Record install date.
CO
2
• Cylinder needs to be secured in an upright position.
• Located in a cool well ventilated area.
• Protect cylinder from sunlight when ambient temperature exceeds 52º C/125º F.
• If required, use a fiber or nylon gasket to seal the primary CO
2
pressure regulator to the cylinder.
• Set cylinder pressure regulator to 120 psig.
NOTE: For proper air circulation and functionality, leave 4” of clearance
on both sides, and 6” of clearance at the top and back of the machine.
