Bunn CDBCFP, CDBC020213 User Manual

CDBC, CDBCF

CDBCP, CDBCFP

S/N CDBC020213 & up

SINGLE CD, SINGLE CDF

CAUTION

DISCONTINUED VERSION

The information in this manual

is no longer current.

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: [phone] FAX: [phone]

35582.0000C 02/04 ©2003 Bunn-O-Matic Corporation www.bunnomatic.com

INTRODUCTION

This equipment will automatically brew a half-gallon batch of coffee into an awaiting decanter at the press of
a button. A hot water faucet is included for allied beverage use. Most functions of the brewer are digitally controlled.
It is only for indoor use on a sturdy counter or shelf.

CONTENTS

Introduction & Warranty .................................................................................................................. 2

User Notices .................................................................................................................................... 3

Electrical & Plumbing Requirements ............................................................................................... 4

Operating Controls........................................................................................................................... 5

Initial Set-Up & Coffee Brewing ....................................................................................................... 6

Pour-Over Feature............................................................................................................................ 7

Cleaning........................................................................................................................................... 7

CDBC, SINGLE CD Adjustments & Optional Settings ....................................................................... 8

CDBC, SINGLE CD Water Sensing Threshold Adjustment Procedure .............................................. 9

CDBC, SINGLE CD Pulse Brew Setup Procedure ........................................................................... 10

Troubleshooting ............................................................................................................................. 11

Service........................................................................................................................................... 22

Wiring Diagrams............................................................................................................................ 31

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:

1) All equipment other than as specified below: 2 years parts and 1 year labor.

2) Electronic circuit and/or control boards: parts and labor for 3 years.

3) Compressors on refrigeration equipment: 5 years parts and 1 year labor.

4) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years
or 30,000 pounds of coffee, whichever comes first.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially
free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period.
This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment,
has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or
casualty. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by
telephone at [phone] or by writing to Post Office Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping
the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior authorization from BUNN that the
defective equipment is under warranty.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make modifications to this warranty or to

make additional warranties that are binding on BUNN. Accordingly, statements by such individuals, whether oral or written, do not
constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the
equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the applicable parts and labor
warranty periods specified above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service
Representative; or 2) shall replace the equipment or refund the purchase price for the equipment.

THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT,
WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION AS SPECIFIED HEREIN, TO
REPAIR, REPLACEMENT OR REFUND.

In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of
equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any
other special, incidental or consequential damages.

BUNN, CDBC, and CDBCF, CDBCP, CDBCFP, SINGLE CD, and SINGLE CDF are either trademarks or registered
trademarks of Bunn-O-Matic Corporation.

Page 2

35582 08263

USER NOTICES

Carefully read and follow all notices in this manual and on the equipment. All labels on the equipment should

be kept in good condition. Replace any unreadable or damaged labels.

# 00986.0000

# 00656.0000

# 00658.0000

! WARNING

DO NOT OVERLOAD CIRCUIT.
ALWAYS ELECTRICALLY GROUND
THE CHASSIS OR ADAPTOR PLUG.
DO NOT DEFORM PLUG OR CORD.
FOLLOW NATIONAL AND LOCAL
ELECTRICAL CODES.
KEEP COMBUSTIBLES AWAY.

FAILURE TO COMPLY RISKS EQUIPMENT

DAMAGE, FIRE OR SHOCK HAZARD.

READ THE ENTIRE

OPERATING MANUAL BEFORE

USING THIS PRODUCT

00986.0000E 5/98 ©1994 Bunn-O-Matic Corporation

! WARNING

DISCARD DECANTER
IF:

° CRACKED
° SCRATCHED
° BOILED DRY
° HEATED WHEN EMPTY

FUNNEL CONTENTS

ARE HOT

° USED ON HIGH FLAME
OR EXPOSED ELECTRIC
ELEMENTS

# 12364.0000

# 10044.0000

READ THE ENTIRE OPERATING MANUAL

BEFORE USING THIS PRODUCT

FAILURE TO COMPLY RISKS INJURY

PN: 00658.0000F 6/98 © 1985 BUNN-O-MATIC CORPORATION

Page 3

35582 041503

ELECTRICAL REQUIREMENTS

CAUTION - The brewer must be disconnected from the power source until specified in

Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single

phase, 60 Hz.

Initial Set-Up.

WHITE

NEUTRAL
L1 BLACK

120V.A.C.

Model 20 requires 2-wire, grounded service rated
120 volts ac, 20 amp, single phase, 60 Hz. Proceed as
follows:

Model 35 requires 3-wire, grounded service rated
120/208 or 120/240 volts ac, 20 amp, single phase, 60
Hz. Proceed as follows:

L2 RED

WHITE

NEUTRAL

L1 BLACK

120V.A.C.

208 or 240V.A.C.

120V.A.C.

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. Remove the front panel beneath the sprayhead.

4. Feed the cord through the strain relief and connect it to the terminal block.

5. Connect the brewer to the power source and verify the voltage at the terminal block before proceeding.
Replace the front panel.

6. If plumbing is to be hooked up later be sure the brewer is disconnected from the power source. If plumbing
has been hooked up, the brewer is ready for Initial Set-Up.

PLUMBING REQUIREMENTS

These brewers must be connected to a cold water system with operating pressure between 5 and 90 psi (34.5
and 620 kPa) from a 1⁄2" or larger supply line. A shut-off valve should be installed in the line before the brewer. Install
a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi (345 kPa). The water
inlet fitting is 1⁄4" flare. Bunn-O-Matic does not recommend the use of a reverse-osmosis or deionized water supply
to this equipment.

NOTE - Bunn-O-Matic recommends 1⁄4" copper tubing for installations of less than 25 feet and 3⁄8" for more than
25 feet from the 1⁄2" water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer
to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The
size and shape of the hole made in the supply line by this type of device may restrict water flow.

This equipment must be installed to comply with the Basic Plumbing Code of the

Building Officials and Code Administrators International, Inc. (BOCA)

and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).

Plumbing Hook-Up

1. Flush the water line.

2. Securely attach it to the flare fitting at the rear of the brewer.

3. Turn on the water supply.

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35582 091503

OPERATING CONTROLS

TEMP

ON/OFF SWITCH

Pressing the "ON/OFF" switch (indicator glowing) supplies
power to the brew station warmer, enables the brew circuit, and
energizes the tank refill circuit. Pressing the switch again (indicator
not glowing) stops tank refilling and brewing and deenergizes the
brew station warmer. Stopping a brew cycle after it has been started
will not stop the flow of water into the decanter until the funnel is
empty.

(CDBC models)

(SINGLE CD models)

TEMP

P1626

P 2642

NOTE – Hot water will be available at the faucet in a limited amount
when the "ON/OFF" indicator is not glowing because the tank will not
refill.

BREW SWITCH

Momentarily pressing and releasing the switch starts a brew
cycle when the "ON/OFF" indicator is glowing.
NOTE – The "ON/OFF" indicator must be glowing to initiate and
complete a brew cycle.

BATCH SLECTORS (SINGLE CD only)

Pressing a batch size switch (1/2 gal. or 1 gal.) so the indicator
is glowing will set the brewer to deliver the desired brew volume.

ADDITIONAL WARMER SWITCHES (CDBC only)

Pressing any additional warmer switch so that the indicator is
glowing, supplies power to the associated warmer.

READY INDICATOR

This indicator glows when the preset temperature has been
achieved. The word "NOT" above "READY" will glow in all other
instances.

TEMPERATURE INDICATORS

The indicator glows to communicate the brew water tempera­ture setting. Two indicators will glow when the temperature is
between them.

Page 5

35582 041503

INITIAL SET-UP

1. Insert an empty funnel into the funnel rails.

2. Place an empty decanter under the funnel.

3. Connect the brewer to the power source.

4. Model CDBC – Press the "ON/OFF" switch (indicator glowing).
Model SINGLE CD - Press the "1 gal" switch (indicator glowing) and the "ON/OFF" switch (indicator glowing).

5. Water will flow into the tank and stop when the tank is filled to its capacity.

6. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature.

7. To remove expansion water, place a small vessel beneath the faucet and open the faucet handle. Release it
when you hear the tank refilling. If brewer is not equipped with a faucet, place a empty decanter beneath the
funnel and initiate a brew cycle.

8. Place an empty decanter/server beneath the funnel and press the "ON/OFF" switch (indicator glowing) then
momentarily press and release the "BREW" switch.

9. Allow the cycle to finish and measure the amount of water in the decanter/server. It should be 64 ounces ±
2 for CDBC models and 128 ounces ± 2 for SINGLE CD models. Refer to the adjustments section of this manual
should the volume need to be increased or decreased.

10. Model SINGLE CD only press the "1/2 gal." switch, place an empty server beneath the funnel and press and
release the "BREW" switch. Allow the cycle to finish and measure the amount of water in the server. It should
be 64 ounces ± 2. Refer to the adjustments section of this manual should the volume need to be increased
or decreased.

The brewer is now ready for use in accordance with the coffee brewing instructions below.

COFFEE BREWING

1. Insert a BUNN® filter into the funnel.

2. Pour fresh coffee grounds into the filter and level the bed of grounds by gently shaking.

3. Slide the funnel into the funnel rails.

4. Place an empty decanter/server beneath the funnel.

5. Model CDBC – Press the "ON/OFF" switch (indicator glowing) then momentarily press and release the "BREW"
switch.
Model SINGLE CD - Select 1/2 or 1 Gallon setting then momentarily press and release the "BREW" switch.

6. When brewing is completed, simply discard the grounds and filter.

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35582 041503

POUR-OVER FEATURE

Models CDBCP & CDBCFP

If the brewer is equipped with a pour-over feature, follow the instructions below.

1. Remove the thumbscrew and pour-in lid from the top cover of the brewer and set aside.

2. Insert a BUNN® filter into the funnel.

3. Pour fresh coffee grounds into the filter and level the bed of grounds by gently shaking.

4. Slide the funnel into the funnel rails.

5. Place an empty decanter beneath the funnel.

6. Measure 64 ounces of cold water in a container and slowly pour the water into the pour-in opening.
NOTE: When using pour-over feature to brew a 1 gal. batch, pour in 64 ounces of cold water and wait
until drip out of funnel is complete then pour in 64 more ounces of cold water.

7. Press the ON/OFF button to activate the lower warmer (Indicator lamp on).
NOTE: Do not press the Brew Button. It is not necessary when using the pour-over feature.

8. When brewing is completed, simply discard the grounds and filter.

CLEANING

1. 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.

2. Check and clean the sprayhead. The sprayhead holes must always remain open.

Page 7

35582 041503

CDBC, SINGLE CD ADJUSTMENTS & OPTIONAL SETTINGS

HIDDEN

SWITCH

P1866

Setting Brew Temperature

The brewer is factory set to brew at 200°F (93˚C). To change this setting, press and hold the "HIDDEN" switch
beneath the "®". The word "TEMP" above the "ON/OFF" switch will glow to correspond with the temporary function
change of this switch. Repeatedly press and release the "ON/OFF" switch until one of the bank of temperature
indicators shows the approximate desired temperature. When two indicators are glowing, the temperature is
approximately the number between them.

Setting Brew Lockout

The brewer is factory set with the brew lockout disabled. Brew lockout prevents starting a brew cycle if the ready
indicator is not glowing. When an attempt at brewing cannot be allowed, the word "NOT" and "LOCKOUT" flash for
three seconds to indicate the reason the brew can't begin. To change the condition of the brew lockout, press and
hold the "HIDDEN" switch beneath the "®" and momentarily press the "BREW" switch.

Adjusting Automatic Warmer Shut-Off

The brewer is factory set with this feature disabled. The automatic warmer shut-off deenergizes all warmers
after a predetermined time period after the most recent brew cycle. To change the setting, press and hold the
"BREW" switch and the "HIDDEN" switch beneath the "®" for five seconds, the entire bank of temperature indicators
will flash on-and-off. Release both switches. Pressing and releasing the "BREW" switch will select the number of
temperature indicators from none to five. When no indicators are glowing, this feature is disabled and all warmers
will be controlled only by their respective switches. When one of five indicators are glowing, it indicates the
approximate number of hours of delay before all warmers will be automatically deenergized after the most recent
brew cycle.

IMPORTANT: The tank must be full and fill solenoid shut off prior to making these adjust­ments.
Adjusting Brew Volumes

CDBC models are factory set to deliver 64 ounces ± 2 for each brew cycle.

SINGLE CD models are factory set to deliver 128 ounces ± 2 for each brew cycle when 1 gal. option is selected
and 64 ounces ± 2 for each brew cycle when 1/2 gal. option is selected.

Page 8

35582 041503

ADJUSTMENTS & OPTIONAL SETTINGS (cont.)

BREW VOLUME SET-UP: Use the following steps when the setting is unknown or a different circuit board is being

installed.

1. Place an empty funnel in the funnel rails and an empty decanter/server or graduated vessel beneath the funnel.

2. Place the "ON/OFF" switch in the "ON", upper position.

3. Press and hold the brew start button until you hear the brew solenoid click on-and-off three times
(approximately 10 seconds). Release the button.

4. Allow the cycle to continue until the desired amount of water is dispensed and then turn "OFF" the brewer.

The brewer is now set to dispense this amount of water for each subsequent brew cycle.

To increase the amount of water for each brew cycle place an empty funnel in the funnel rails and an empty

decanter/server or graduated vessel beneath the funnel. Press the "ON/OFF" switch. Press and hold the "BREW"
switch until you hear the solenoid click on-and-off three times (approximately 10 seconds), then release the
"BREW" switch. Momentarily press and release the "BREW" switch once for each ounce (approximate) of water to
be added to the prior setting and allow the brew cycle to finish.

To decrease the amount of water for each brew cycle place an empty funnel in the funnel rails and an empty

decanter/server or graduated vessel beneath the funnel. Press the "ON/OFF" switch. Momentarily press and
release the "BREW" switch once for each ounce (approximate) of water to be removed from the existing setting.
Press and hold the "BREW" switch until you hear the solenoid click on-and-off three times (approximately 10
seconds), then release the "BREW" switch and allow the cycle to finish.

NOTE: For Model SINGLE CD, set 1/2 gallon and 1 gallon separately.

WATER SENSING THRESHOLD ADJUSTMENT PROCEDURE

1. Make sure the tank is full of water to be used for calibration. The water must be in contact with the refill probe.

2. Unplug the brewer from the power source, then press and hold the BREW button while power is reapplied.

3. Continue pressing the BREW button until the READY indicator begins to flash. Release the BREW button and
then press it again momentarily.

4. The new calibration is automatically completed within a few seconds. If the water is too pure for use with the
brewer, the READY indicator will flash very rapidly and the old calibration will be retained.

Page 9

35582 021604

PULSE BREW SETUP PROCEDURE (CDBC & SINGLE CD)

The pulse brew parameters (initial fill time, off times, and remaining on times) are entered using the following set­by-example process.

1. First set the brew volume using the standard procedure in

2. Position an empty container under the sprayhead. Allow the tank to finish refilling. Make sure that the READY
lamp is on, or that the BREW LOCKOUT function is turned off.

3. Press and hold the OFF/ON button. The brew valve will turn on after 10 seconds. Release the button. This begins
the initial on-time setting. When the spray has continued for the desired time, momentarily press the OFF/ON
button.

4. The spray is now stopped and the off time setting has begun. Press the OFF/ON button momentarily to end
the off time.

5. The spray is now on again and the remaining on time setting has begun. Press the OFF/ON button momentarily
at the end of the desired remaining on time.

6. The setup is now complete and the parameters are stored in memory. The spray will continue the off and on
cycles until the brew volume of step 1 is complete. Pressing the OFF/ON button again will terminate the brewing
cycle, with the parameters stored in memory.

7. If only a preinfusion is desired, i.e. an initial on time followed by one off period, use the same procedure, but
stop after step 4 and allow the brew to finish the volume set in step 1. This will store the initial on time and off
time in memory.

Brew Volume Setup.

Procedure for Disabling Pulse Brew or Preinfusion:

1. Position an empty container under the sprayhead. Allow the tank to finish refilling. Make sure that the READY
lamp is on, or that the BREW LOCKOUT function is turned off.

2. Press and hold the OFF/ON button. The brew valve will turn on after 10 seconds. Release the button.

3. Allow the spray to continue and press no buttons until spray stops. The pulse and preinfusion functions are
now disabled.

NOTE: When the brewer has been set up for pulse or preinfusion, the adjustment of brew volume is done the same
as always and has no effect on the pulse brew parameters. The pulsing is temporarily disabled while adjusting the
brew volume and automatically returns during normal brewing.

Page 10

35582 041503

TROUBLESHOOTING

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.

• Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

• All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of

terminals or the application of external voltages may result in board failure.

• Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an

intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a

terminal or crimp.

• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are

energized for more than ten minutes without a supply of water.

• The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help

to avoid twists and kinks in the tubing.

• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.

• This brewer is heated at all times. Keep away from combustibles.

WARNING –•Exercise extreme caution when servicing electrical equipment.

• Unplug the brewer when servicing, except when electrical tests are specified.

• Follow recommended service procedures.

• Replace all protective shields or safety notices.

Before troubleshooting this brewer, check for the following:

Control Boards

1. Make sure ribbon cable is properly attached to the control board (ALL PINS INSERTED INTO PLUG).

2. Make sure there is a nylon insulating washer under each screw head that holds the control board to the plastic
front end cap. This is important for proper operation.

3. Make sure before servicing brewer that voltage is present at control board.

4. Press any warmer switch or observe if any indicator lights are glowing on the control panel. If so, proceed
with testing. If not, check for voltage across pins 1 & 2 of the ten pin J1 connector (black and white wires). If
voltage is present, replace the control board. If voltage is not present, check wiring and voltage across terminal
block (black and white). Correct the problem and retest before proceeding with testing.

Page 11

35582 041503

TROUBLESHOOTING (cont.)

REFILL CIRCUIT

PROBABLE CAUSE REMEDYPROBLEM

Will not fill or refill

1. Power off to brewer

2. Water shut off

3. Display flashing

4. ON/OFF Switch

5. Lime build up on Probe

6. Refill Valve or Control Board

Press warmer switches on control
panel to determine if power is ON.

Make sure water is ON.

Brewer has shut down due to
malfunction (See Diagnostic Chart
in manual, Page 21, or under top
lid of brewer).

Make sure ON/OFF Switch is "ON"
and indicator is lit.

Remove the Probe and check for
lime deposit on tip. Clean and
reinstall.

Disconnect the brewer from the
power source and remove wires
from refill valve coil. Check for
continuity across the terminals of
the solenoid coil. If continuity is
not present, replace the refill valve
(See page 29). If continuity is
present, the coil may be stuck
closed. Shut water off to brewer.
Set the ON/OFF switch to the "OFF"
position. Open the faucet and drain
water down in the tank until flow
stops or slows to a trickle. Attach
a voltmeter to the terminals of the
refill solenoid. Connect the brewer
to the power source. Press the
switch "ON". Within five seconds,
voltage should be present at the
solenoid terminals. If voltage is
not present, refer to the wiring
diagrams and check the wiring
harness.

7. Water is too conductive for
proper operation when using the
factory setting of sensing thresh­old.

Page 12

Reset the

Water Sensing Thresh-

old Adjustment Procedures

page 9.

35582 041503

on

TROUBLESHOOTING (cont.)

REFILL CIRCUIT (cont.)

Fill or refill does not shut "OFF"
(ON/OFF Switch "ON")

PROBABLE CAUSE

1. Lime build up on probe

2. Water Level Probe Sensing Sys­tem

3. Refill valve or control board

REMEDYPROBLEM

Remove Probe and check for lime
deposits on tip. Clean and reinstall.

Disconnect the brewer from the
power source. Disconnect the J3
connector from the control board.
Check for continuity from the nut
on top of the level probe to pin 1 of
the plug, continuity should be
present. Pull the temperature
probe up about an inch from the
grommet. Check for continuity
from the outside surface of the
temperature probe and pin 4 of the
plug, continuity should be present.
Connect the J3 plug to the control
board and proceed to step 3.

Press ON/OFF switch to "ON" (In­dicator lamp should be lit). If wa­ter continuously flows out of air
vent tube, disconnect the brewer
from the power source. If water
flow stops, replace the control
board. If water flow does not stop,
repair or replace the refill sole­noid. (See page 29)

Fill or refill does not shut "OFF"
(ON/OFF Switch "OFF")

4. Water is too conductive for
proper operation when using the
factory setting of sensing thresh­old.

1. Refill valve or control board

Page 13

Reset the

old Adjustment Procedures

Water Sensing Thresh-

on

page 9.

If water continuously flows out of
air vent tube, disconnect the
brewer from the power source. If
water flow does not stop, repair or
replace the refill solenoid. If the
valve closes when power is re­moved, replace the control board.
(See page 23)

35582 091503

TROUBLESHOOTING (cont.)

HEATING CIRCUIT
PROBLEM PROBABLE CAUSE

REMEDY

Water does not heat to proper
temperature

IMPORTANT: Make sure no tem­perature tests are taken before the
ready light is "ON". Tank tempera­ture must be stabilized before read­ings are taken.

1. Display flashing

2. Water not touching tempera­ture probe

3. Dry Plug In Probe Sensing Sys­tem

Brewer has shut down due to mal­function (See Diagnostic Chart in
manual, Page 21, or under top lid).

Remove probe and grommet. Look
into hole on tank lid. Water must
be within one inch from top of
tank.

Disconnect the brewer from the
power source. Disconnect the J3
connector from the control board.
Check for continuity from the tank
mounting screw where the green
wire mounts, to pin 2 of the plug,
continuity should be present. Pull
the temperature probe up about
an inch from the grommet. Check
for continuity from the outside
surface of the temperature probe
and pin 4 of the plug, continuity
should be present. Connect the J3
plug to the control board and pro­ceed to step 4.

Page 14

35582 091503

TROUBLESHOOTING (cont.)
HEATING CIRCUIT (cont.)

PROBLEM PROBABLE CAUSE REMEDY

Water does not heat to proper
temperature (cont.)

IMPORTANT: Make sure no tem­perature tests are taken before the
ready light is "ON". Tank tempera­ture must be stabilized before read­ings are taken.

4. Temperature Probe

5. Limit Thermostat

6. Tank Heater

Remove the probe from the grom­met and submerge in a water bath
of approximately 70°F(21°C). Con­nect an ohmmeter to pins 3 and 4
of the J3 connector. At 60°F(16°C)
the reading should be 15.3k ± 2k
OHMS, at 70°F(21°C) the reading
should be 11.8k ± 2k OHMS, and
at 80°F(27°C) the reading should
be 9.3k ± 2k OHMS. If the probe is
within these parameters, recon­nect the J3 plug to the control
board.

Disconnect the brewer from the
power source. Check for continu­ity across the limit thermostat ter­minals. Continuity should be
present. If not replace the limit

thermostat.(See page 26)

Disconnect the brewer from the
power source. Check for continu­ity between the white terminal of
the terminal block (or Red termi­nal on 208/240 volt models) and
the black wire on the relay on the
control board. There should be a
low OHM reading. If no continuity
is present, check for a wiring prob­lem, then replace the tank heater if
no wiring problem is found. (See
page 27)

Spitting or excessive steaming

1. Lime build up on temperature
probe, tank or tank heater

Page 15

Inspect probe and tank assembly
for excessive lime deposits. Delime
as required.

35582 041503

TROUBLESHOOTING (cont.)

HEATING CIRCUIT (cont.)

PROBLEM PROBABLE CAUSE REMEDY

Spitting or excessive steaming
(cont.)

Brewer is making unusual noises

2. Temperature Probe

3. Control Board

1. Plumbing lines

Remove the probe from the grom­met and submerge in a water bath
of approximately 70°F(21°C). Con­nect an ohmmeter to pins 3 and 4
of the J3 connector. At 60°F(16°C)
the reading should be 15.3k ± 2k
OHMS, at 70°F(21°Cº the reading
should be 11.8k ± 2k OHMS, and
at 80°F(27°C) the reading should
be 9.3k ± 2k OHMS. If the probe is
within these parameters, recon­nect the J3 plug to the control
board.

Set the temperature to 200°F
(93°C). Let tank temperature sta­bilize. If temperature in tank is
above temperature setting by more
than 7°F(3.9°C), replace the con-

trol board.(See page 23)

Plumbing lines should not rest on
the counter top.

2. Water supply

3. Lime build up

The brewer must be connected to
a cold water supply.

Remove the tank lid and clean
inside of tank with a deliming agent,
if necessary.

Page 16

35582 041503

TROUBLESHOOTING (cont.)

BREWING CIRCUIT

PROBLEM PROBABLE CAUSE REMEDY

Brew cycle will not start 1. Display flashing

2. No water

3. No power or incorrect voltage to
the brewer

4. ON/OFF switch not in the "ON"
position

5. Low water temperature (Brew
lockout is enabled)

6. Water not touching refill probe
inside tank

Brewer has shut down due to
malfunction (See Diagnostic Chart
in manual, Page 21, or under top
lid of brewer).

Water lines and valves to the
brewer must be open.

Check for voltage across the black
and white terminals at the termi­nal block.

The indicator lamp must be lit

Allow brewer to heat until ready
lamp is lit, or disable the brew
lockout feature. (See page 8)

Press ON/OFF switch (indicator
must be lit). Brewer will refill until
water touches probe inside tank.
Water must be in contact with
refill probe before brew cycle will
start.

7. Switch panel

Page 17

Disconnect the brewer from the
power source. Disconnect the rib­bon connector from the control
board. Check for continuity be­tween pins 1 & 2 (An arrow on the
connector indicates pin 1). No
continuity should be present. Press
the BREW switch. Continuity
should be present for as long as
the switch is held "ON". If no con­tinuity is present, replace the
switch membrane decal.(See page

24)

35582 041503

TROUBLESHOOTING (cont.)

BREWING CIRCUIT (cont.)

PROBLEM PROBABLE CAUSE REMEDY

Brew cycle will not start (cont.)

Consistently low beverage level in
the dispenser or beverage over­flows dispenser

8. Control board or dispense valve

1. Brew volume

If the switch panel is operating
properly, proceed as follows. At­tach a voltmeter to the terminals
of the dispense solenoid. Connect
the brewer to the power source.
Turn on the brewer and press the
BREW switch. Voltage should be
present at the solenoid terminals.
If voltage is not present, refer to
the wiring diagrams and check
the wiring harness. If voltage is
present, check for continuity
across the terminals of the sole­noid coil. If continuity is not
present, replace the solenoid (See
page 25). If continuity is present,
the valve may be stuck closed.

Set up brewer according to in­structions in section

Adjustments

Brew Volumes. (See page 8) Us-

ing a stop watch or second hand,
time the length of the brew cycle.
Record this time inside the top lid.
If service is ever needed again, use
the time as reference to determine
if time has changed.

-

2. Lime build up

3. Dispense Valve

Page 18

Inspect the dispense valve and
spray head for excessive lime de­posits. Delime as required.

Remove dispense valve and clear
any obstructions. Rebuild or re­place valve if necessary. (See page

25)

35582 041503

TROUBLESHOOTING (cont.)

BREWING CIRCUIT (cont.)

PROBLEM PROBABLE CAUSE REMEDY

Dripping from spray head

Weak beverage

1. Lime build up

2. Dispense valve

1. Sprayhead

2. Water temperature

Inspect the tank assembly for ex­cessive lime deposits. Delime as
required.

Remove the dispense valve and
clear any obstructions. Rebuild or
replace the valve if necessary.(See
page 25)

A clean spray-head must be used
for proper extraction.

Place an empty brew funnel on an
empty decanter beneath the
sprayhead. Initiate brew cycle and
check the water temperature im­mediately below the sprayhead
with a thermometer. The reading
must not be less than 195°F(91°C).
Adjust the temperature setting to
increase the water temperature.
Refer to

Initial Set-up

instructions.

3. Filter type

4. Coffee grind

5. Funnel loading

BUNN® paper filters must be used
for proper extraction.

A fine drip or grind must be used
for proper extraction.

The BUNN® paper filter must be
centered in the funnel and the bed
of grounds leveled by shaking
gently.

Page 19

35582 041503

TROUBLESHOOTING (cont.)

BREWING CIRCUIT (cont.)

PROBLEM PROBABLE CAUSE REMEDY

Dry coffee grounds remain in the
funnel

Low beverage serving tempera­ture

1. Sprayhead

2. Funnel loading

1. Warmer

Make sure sprayhead is present
and holes are clear and unob­structed.

The BUNN® paper filter must be
centered in the funnel and the bed
of grounds leveled by shaking gen­tly.

Disconnect the brewer from the
power source. Remove the warmer
plate and turn upside down to ex­pose the warmer terminals. Re­move the two wires. Check for
continuity across the two warmer
terminals. If continuity is not
present, replace the warmer ele­ment (See page 30). If continuity
is present, reconnect the wires to
the warmer element. Check for
voltage at the warmer terminals.
Turn the warmer switch "ON". The
indicator light will come on. Volt­age should be present at the ter­minals. If not, disconnect power
supply and check wiring and
switch.

Page 20

35582 041503

DIAGNOSTICS

The bank of temperature indicators indicates that a fault exists. Count the number of flashes between pauses and
use this chart as a guide to investigating the fault.

FLASHES CAUSE THINGS TO CHECK

1 Dry Plug - In Fault - Water Pressure (Is water shut "OFF")

Sheath of temperature probe dry for 10 minutes after power-up Temperature probe wiring

Fill valve wiring, function, & strainer
Green wire between tank and circuit board

2 Low Tank Level Fault - Water pressure (Is water shut "OFF")

Level probe dry for 7 minutes after fill valve is energized Level probe wiring

Temperature probe wiring
Fill valve wiring, function, & strainer

3 Low Water Temperature Fault - Tank heater wiring & function

Sensor in tank is calling for heat for 30 minutes or more Temperature probe wiring

4 Tank Sensor Disagreement - Temperature probe wiring

Level probe detects water, but dry plug-in probe dry Level probe wiring

Green wire between tank and circuit board

5 Temp Sensor Out-of-Range - High Sensor not connected to circuit board

6 Temp Sensor Out-of-Range - Low Sensor wires shorted together or to chassis

Page 21

35582 041503

SERVICE

This section provides procedures for testing and

replacing various major components used in this
brewer should service become necessary. Refer to

Troubleshooting

cause of any problem.

WARNING - Inspection, testing, and repair of electri­cal equipment should be performed only by qualified
service personnel. The brewer should be unplugged
when servicing, except when electrical tests are re­quired and the test procedure specifically states to
plug in the brewer.

COMPONENT ACCESS

WARNING - Disconnect the brewer from the power

source before the removal of any panel or the replace­ment of any component.

for assistance in determining the

All components are accessible by the removal of

the top cover or warmer housing, front access panel
and warmer plate(s).

The top cover is attached with one #4-40 screw.

The front access panel is attached with four #6-32

screws.

Each warmer assembly is attached with three #4-

40 screws.

Contents

Control Board - CDBC & SINGLE CD ................. 23

Switch Panel - CDBC & SINGLE CD .................. 24

Dispense Valve .................................................. 25

Limit Thermostat ............................................... 26

Tank Heater .......................................................27

Refill Valve ......................................................... 29

Warmer Elements ..............................................30

Wiring Diagrams............................................... 31

P2675

FIG. 1 COMPONENT ACCESS

Page 22

35582 041503

SERVICE (cont.)

CONTROL BOARD

ES ARE HOT

FAC

WARMERS AND SUR

N :

UTIO

CA

P1846

FIG. 2 CONTROL BOARD

Location:

The Control Board is located inside the top cover
behind the front end cap.

Test Procedures:

The test procedures for the control board will vary
depending upon the problems experienced by the
brewer. Refer to the Troubleshooting guide beginning
on page 9. The troubleshooting guide is divided into
three sections, Refill Circuit, Heating Circuit, and Brew­ing Circuit.

Removal and Replacement:

1. Disconnect the black wire and blue wire from the
relay on the control board.

2. Disconnect the 10-pin connector and the 4-pin
connector from the main wiring harness.

3. Disconnect the 11-pin connector from the control
panel.

4. Remove the four #6 screws and four nylon wash­ers and the two #4-40 screws securing the control
board to the end cap assembly.

5. Install a new control board and secure with the
four #6 screws and nylon washers and the two #4­40 screws to the end cap assembly.
NOTE: The four nylon washers must be installed
under the heads of the four #6 screws to prevent
a possible shorting of the control board circuits.

6. Connect the 11-pin connector from the control
panel.

7. Connect the 10-pin connector and the 4-pin con­nector from the main wiring harness.

8. Connect the blue wire and black wire to the relay on
the control board.

9. Refer to

Optional Settings

CDBC , SINGLE CD Adjustments and

to program the new control

board.

Page 23

35582 041503

SERVICE (cont.)

SWITCH PANEL

FIG. 3 SWITCH PANEL

Location:

The Switch Panel is located in the front of the

hood.

P1848

Removal and Replacement:

1. Disconnect the 11-pin connector to the switch
panel from the control board.

2. Remove the four #6 screws, nylon washers and
the two #4-40 screws securing the control board
to the end cap assembly and set aside.

3. Gently pry the switch panel from the end cap
assembly.

4 Remove any adhesive that remains on the end cap.

5. Remove the adhesive backing from the new switch
panel. Insert the ribbon connector through the slot
in the end cap and apply the switch panel to the end
cap.

6. Install the control board to the back side of the end
cap using the four #6 screws, nylon washers and
the two #4-40 screws to the end cap assembly.
NOTE: The four nylon washers must be installed
under the heads of the four #6 screws to prevent
a possible shorting of the control board circuits.

7. Reconnect the 11-pin connector from the switch
panel to the control board making sure every pin
on the control board is inserted into the ribbon
cable plug.

Test Procedures:

The test procedures for the switch panel and the
control board will vary depending upon the problems
experienced by the brewer. Refer to the Troubleshoot­ing guide beginning on page 11. The troubleshooting
guide is divided into three sections, Refill Circuit,
Heating Circuit, and Brewing Circuit.

Page 24

35582 041503

SERVICE (cont.)

DISPENSE VALVE

WARMERS AND SURFACES ARE HOT

:

N
TIO
U

A

C

6. Connect the voltmeter lead ends to the dispense
valve coil terminals. Connect the brewer to the
power source. Brewer temperature lockout must
be disabled. Place "ON/OFF" Switch in the "ON"
position. Press and release the brew switch. The
indication must be 120 volts ac for two-wire 120
volt models and three-wire 120/208 volt models.

7. Disconnect the brewer from the power source.

If voltage is present as described, but no coil action is
observed, nor "clicking" heard, dispense valve is de­fective. Replace valve and test again to verify repair.
If voltage is not present as described, refer to

Diagrams

and check the brewer wiring harness. Also

Wiring

check the control board for proper operation. See
Page 23.

P1852

FIG. 4 DISPENSE VALVE

Location:

The dispense valve is located inside the top cover

behind the front end cap.

Test Procedures:

1. Disconnect the brewer from the power source.

2. Check the water level in the tank to confirm that it
is within 1/2" from the top of the tank.

3. Connect the brewer to the power source. If the
brewer has been set for brewer temperature lock­out, this feature must be disabled. See Page 8 for
procedure.

4. Check the dispense valve for coil action. Place the
ON/OFF switch in the "ON" position, press and
release the BREW switch. Listen carefully in the
vicinity of the dispense valve for a "clicking" sound
as the coil magnet attracts and repels the plunger.

5. Disconnect the brewer from the power source.

Removal and Replacement:

1. Disconnect wires from the dispense valve.

2. Drain enough water from the tank so the dispense
valve is above the water level.

3. Remove water lines from the dispense valve.

4. Remove the two #8-32 nuts securing the dispense
valve to the sprayhead panel.

5. Install a new dispense valve using the two #8-32
nuts.

6. Reconnect water lines to the dispense valve and
secure in place with clamps.

7. Refer to FIG. 5 when reconnecting wires.

WHI/GRN from
Control Board

WHI from Terminal
Block

If the sound is heard as described, there may be a
blockage in the dispense valve or the water line to the
sprayhead. Remove the dispense valve and inspect for
wear, and remove waterborne particles.
If the sound is not heard as described, proceed to #6.

Page 25

P1853

FIG. 5 DISPENSE VALVE WIRING

35582 041503

SERVICE (cont.)

LIMIT THERMOSTAT

Removal and Replacement:

1. Remove the black and blue wires from limit ther­mostat terminals.

2. Carefully slide the limit thermostat out from under
the retaining clip and remove limit thermostat.

3. Carefully slide the new limit thermostat into the
retaining clip.

4. Refer to FIG. 7 when reconnecting the wires.

BLU from Control
Board

P1854

FIG. 6 LIMIT THERMOSTAT

Location:

The limit thermostat is located inside the front

access panel on the front side of the tank.

Test Procedures:

1. Disconnect the brewer from the power source.

2. Disconnect the blue and black wires from the limit
thermostat.

3. With an ohmmeter, check for continuity across the
limit thermostat terminals.

If continuity is present as described, the limit thermo­stat is operating properly.
If continuity is not present as described, replace the
limit thermostat.

BLK from Terminal
Block

P1800

FIG. 7 LIMIT THERMOSTAT WIRING

Page 26

35582 041503

SERVICE (cont.)

TANK HEATER

P1855

FIG. 8 TANK HEATER

Location:

The tank heater is located inside the tank and

secured to the tank bottom.

Test Procedures:

1. Disconnect the brewer from the power supply.

2. With a voltmeter, check the voltage across the

white or red wire from the terminal block and the
black wire from the control board. Connect the
brewer to the power source. The indication must
be 120 volts ac for two wire 120 volt models or 240
volts ac for three wire 120/240 volt models.

3. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #4
If voltage is not present as described, refer to the

Wiring Diagrams

and check wiring harness.

4. Disconnect the black wire and the white wire or red

wire from the tank heater terminals.

5. Check for continuity across the tank heater termi-

nals.

If continuity is present as described, reconnect the
wires, the tank heater is operating properly.
If continuity is not present as described, replace the
tank heater.

NOTE- If the tank heater remains unable to heat,
remove and inspect heater for cracks in the sheath.

Removal and Replacement:

1. Remove the top cover or top warmer housing and
front access panel as previously described.

2. Disconnect the vent hose from the top of the tank
by pulling the elbow fitting from the grommet in
the top of the tank lid.

3. Drain water from the tank.

4. Disconnect the water supply tube to the dispense
valve from the side of the tank.

5. Disconnect the water supply tube to the solenoid
valve from the bottom of the tank.

6. On brewers with faucet, disconnect the outlet
water line to the faucet from the side of the tank.

7. Disconnect the temperature probe from the top of
the tank by pulling the probe from the grommet in
the top of the tank lid.

8. Disconnect the pink wire from the level probe.

9. Disconnect the green wire from the top of the tank.

10. Disconnect the limit thermostat from the side of
the tank.

11. Disconnect the two white wires from the tank
warmer blanket.

12. Disconnect the black wire and the white or red wire
from the tank heater terminals.

13. Remove the four #8-32 nuts securing the tank to
the mounting brackets and remove the tank as­sembly.

14. Remove the eight #8-32 nuts securing the tank lid
to the tank.

15. Remove the two hex nuts securing the tank heater
to the bottom of the tank. Remove tank heater with
gaskets and discard.

16. Install new tank heater with gaskets to the bottom
of the tank and secure with two hex nuts.

17. Install tank assembly onto mounting brackets and
secure in place with four #8-32 nuts.

Page 27

35582 041503

SERVICE (cont.)

TANK HEATER (Cont.)

18. Install tank lid and secure in place with eight #8-32
nuts.

19. Connect the two white wires of the tank warmer
blanket.

20. Connect the limit thermostat to the front of the tank
assembly.

21. Connect the green wire to the tank mounting
bracket using #8-32 nut.

22. Connect the pink wire to the level probe.

23. Insert the temperature probe through the grom­met in the tank lid.

24. Install the elbow fitting of the vent hose into the
grommet in the tank lid.

25. On brewers with faucet, connect the outlet water
line of the faucet to the side of the tank and secure
with clamp.

26. Connect the water supply tube from the solenoid
to the bottom of the tank and secure with clamp.

27. Connect the water supply tube from the dispense
valve to the side of the tank and secure with clamp.

28. Refer to FIG. 9 when reconnecting the tank heater
wires.

29. Install access panels and covers and refer to

Set-up

for refill and operation.

Initial

BLK to Control Board

WHI or RED to Terminal
Block

P1856

FIG. 9 TANK HEATER WIRING

Page 28

35582 041503

SERVICE (cont.)

REFILL VALVE

AU

C

WARM

N :

TIO

ERS AND SURFACES ARE HOT

P1857

If continuity is not present as described, replace the
refill valve.

6. Check the refill valve for coil action. Connect the
brewer to the power source. With "ON/OFF" switch
in the "ON' upper position press start switch and
listen carefully in the vicinity of the refill valve for
a" clicking" sound as the coil magnet attracts.

7. Disconnect the brewer from the power source.

If the sound is heard as described and water will not
pass through the refill valve, there may be a blockage
in the water line before the refill valve or, the solenoid
valve may require inspection for wear, and removal of
waterborne particles.
If the sound is not heard as described, replace the refill
valve.

FIG. 10 REFILL VALVE

Location:

The refill valve is located inside the trunk on the

lower center part of the component bracket.

Test Procedures:

1. Disconnect the brewer from the power source.

2. Disconnect the white and white/blue wires from
the refill valve. Set the "ON/OFF" switch in the "ON"
upper position.

3. With a voltmeter, check the voltage across the coil
wires. Connect the brewer to the power source.
The indication must be 120 volts ac for two wire
120 volt models and three wire 120/240 volt
models.

4. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to

Diagrams

and check brewer wiring harness.

Wiring

5. Check for continuity across the refill valve coil
terminals.

If continuity is present as described, reconnect the
white and white/blue wires from the circuit board.

Removal and Replacement:

1. Remove both wires from the refill valve.

2. Turn off the water supply to the brewer.

3. Disconnect the water lines to and from the refill
valve.

4. Remove the two 1/4"-20 screws securing the refill
valve mounting bracket to the component bracket.
Remove bracket and valve as an assembly.

5. Using two 1/4"-20 screws install the new refill
valve and bracket to the component bracket.

6. Securely fasten the water lines to and from the
valve.

7. Refer to FIG. 11 when reconnecting the wires.

WHI from Terminal
Block

WHI/BLU from
Control Board

P1858

FIG. 11 REFILL VALVE WIRING

Page 29

35582 041503

SERVICE (cont.)

WARMER ELEMENT(S)

P2675

FIG. 12 WARMER ELEMENTS

Location:

The warmer element(s) is located under the warmer

plate.

Test Procedures:

1. Disconnect the brewer from the power source.

2. Use the white wire from the terminal block and the
other bottom wire on the "ON/OFF" switch.

3. With a voltmeter, check voltage across the two
wires with the "ON/OFF" switch in the "ON" posi­tion. Connect the brewer to the power source.The
indication must be 120 volts ac for two wire 120
volt models and three wire 120/240 volt models.

4. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to

Diagrams

and check brewer wiring harness.

Wiring

5. Check the continuity across the two terminals on
the warmer element.

If continuity is present as described, reconnect the two
wires to the warmer element.
If continuity is not present as described, replace the
warmer element.

Removal and Replacement:

1. Remove the three #4-40 screws securing the
warmer assembly to the brewer.

2. Lift the warmer assembly from the brewer.

3. Disconnect the two wires from the warmer ele­ment terminals.

4. Remove the two #8-32 nuts securing the warmer
element to the warmer plate.

5. Securely install new warmer element.

6. Reconnect the two wires to warmer element termi­nals.

7. Securely install warmer assembly on the brewer.

8. Refer to the

Wiring Diagrams

when reconnecting

the wires.

Page 30

35582 041503

SCHEMATIC WIRING DIAGRAM CDBC - 15, 20 & 35

L1

LIMIT

C
O
N
T
R
O
L

P

C

B
O
A
R
D

BLK

J1-1

J1-2

J1-1

J1-5

J1-10

J2-1

BLK-14

COM
N.O.

THERMOSTAT

WHI

COUNTER

(OPTIONAL)

BLK
BLK

BLU-14

BLK-14

WHI

BLK

BRN/BLK

WHI/BLU

WHI/RED
YEL

WHI/VIO

VIO

WHI/GRN

BREW SW

BLU-14

CONTROL PANEL ASSY

LT FRNT SW

"KEEP WARM" HEATER

LT REAR SW

BLK-14

WHI/GRN

BRN/BLK

P2

P3

VIO

P2

YEL YEL

WHI/RED

DISPENSE

SOL

BRN/BLK

(SEE TABLE BELOW FOR USAGE)

VIO

GRN

TANK HEATER

BREW STATION WARMER

(CONTROLLED BY ON/OFF SW)

WARMER ASSY "A"

FRONT WARMER

REAR WARMER

WARMER ASSY "B"

FRONT WARMER

WHI-14 (MODELS 15 & 20)

RED-14 (MODEL 35)

REFILL

WHI/BLU

P1

WHI

W

H

I

P1

WHI

WHI

SOL

P1, P2, &

P3 ARE

PINS OF A

POLARIZED

THREE-PIN

CONNECTOR.

N L2

WHI

WHI

WHI

WHI

WHI

WHI

J2-6

J2-11

J3-1

J3-4

J5-1

PNK
GRN
WHI

BLK

BLK

ON/OFF SW

HIDDEN SW

STATIC
SHIELD

TOP FRNT SW

RT REAR SW

(NOTE – ALL WARMERS ARE NOT

AVAILABLE ON ALL MODELS!)

TOP REAR SW

WHI/VIO

RT FRNT SW

LEVEL
PROBE

t°

29077.0000C 04/03 ©1998 BUNN-O-MATIC CORPORATION

(SEE TABLE BELOW FOR USAGE)

P3

WHI/VIO

(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)

WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS

REAR WARMER

WARMER WIRING REFERENCE

W

H

I

LEFT

–

"B"

–
"B"
"B"

–

120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE

SINGLE PHASE

TOP

"A"

–
–

–
"A"
"A"

RIGHT

–

–
"A"
"A"

–
"B"

Page 31

35582 041503

SCHEMATIC WIRING DIAGRAM CDBCP/CDBCPF - 15, 20 & 35

N

L1

LIMIT

THERMOSTAT

WHI

RED

BLK

BLU-14

BLK-14

WHI

BLK

BRN/BLK
WHI/BLU
WHI/RED

YEL
WHI/VIO
VIO
WHI/GRN

BREW SW

ON/OFF SW

C
O
N
T
R
O
L

P

C

B
O
A
R
D

BLK

BLK-14

TRM-1
TRM-2

COM
N.O.

J1-1

J1-5

J1-10

J2-1

W/Flashing Lamp (Freshness)

BLU-14

CONTROL PANEL ASSY

LT FRNT SW

TOP FRNT SW

"KEEP WARM" HEATER

LT REAR SW

TOP REAR SW

BLK-14

WHI/GRN

BRN/BLK

P2

P3

VIO

P2

YEL YEL

TANK HEATER

WHI/RED

DISPENSE

SOL

WARMER ASSY "A"

BRN/BLK

(SEE TABLE BELOW FOR USAGE)

VIO

WARMER ASSY "B"

WHI-14 (MODELS 15 & 20)

RED-14 (MODEL 35)

BREW STATION WARMER

(CONTROLLED BY ON/OFF SW)

WHI/BLU

FRONT WARMER

REAR WARMER

FRONT WARMER

WHI

W

H

I

WHI

GRN

P1

P1

WHI

REFILL

SOL

P1, P2, &

P3 ARE

PINS OF A

POLARIZED

THREE-PIN

CONNECTOR.

WHI

WHI

WHI

WHI

WHI

WHI

L2

J2-6

J2-11

J3-1

J3-4

J5-1

HIDDEN SW

STATIC
SHIELD

PNK
GRN
WHI

RT REAR SW

(NOTE – ALL WARMERS ARE NOT

AVAILABLE ON ALL MODELS!)

BLK

BLK

120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE

SINGLE PHASE

RT FRNT SW

t°

LEVEL
PROBE

(SEE TABLE BELOW FOR USAGE)

P3

WHI/VIO

29077.0002B 04/03 ©2002 BUNN-O-MATIC CORPORATION

WHI/VIO

(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)

WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS

REAR WARMER

WARMER WIRING REFERENCE

W

H

I

LEFT

–

"B"

–
"B"
"B"

–

TOP

"A"

–
–

–
"A"
"A"

RIGHT

–

–
"A"
"A"

–
"B"

Page 32

35582 041503

L1

C
O
N
T
R
O
L

P

C

B
O
A
R
D

BLK

TRM1
TRM2

J1-1

J1-5

J1-10

J2-1

BLK-14

COM
N.O.

WHI

BLK
BLK

BLU-14

BLK-14

WHI
BLK

BRN/BLK
WHI/BLU
WHI/RED

YEL
WHI/VIO
VIO
WHI/GRN

BREW SW

SCHEMATIC WIRING DIAGRAM

LIMIT

THERMOSTAT

COUNTER

(OPTIONAL)

CONTROL PANEL ASSY

SINGLE CD - 15, 20 & 35

BLU-14

"KEEP WARM" HEATER

WHI/GRN

BRN/BLK

VIO

YEL

WHI/VIO

BLK-14

WHI/RED

DISPENSE

P2

P3

P2

P3

TANK HEATER

BREW STATION WARMER

(CONTROLLED BY ON/OFF SW)

SOL

GRN

WHI-14 (MODELS 15 & 20)

RED-14 (MODEL 35)

WHI

REFILL

WHI/BLU

P1

P1

SOL

P1, P2, &

P3 ARE

PINS OF A

POLARIZED

THREE-PIN

CONNECTOR.

WHI

WHI

WHI

WHI

WHI

WHI

N

L2

J2-6

J2-11

J3-1

J3-4

J5-1

PNK
GRN
WHI

BLK

BLK

ON/OFF SW

HIDDEN SW

STATIC

SHIELD

1 GAL

(NOTE – ALL WARMERS ARE NOT

AVAILABLE ON ALL MODELS!)

LEVEL
PROBE

1/2 GAL

t°

NO CONNECTION THIS APPLICATION

120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE

SINGLE PHASE

29077.0003C 04/03 ©2003 BUNN-O-MATIC CORPORATION

Page 33

35582 041503

L1

MAIN POWER

SWITCH

BLK-14

SCHEMATIC WIRING DIAGRAM

CDBCP DB/CDBCFP DB

LIMIT

THERMOSTAT

BLU-14

BLK-14

TANK HEATER

L2

GRN

RED-14

C
O
N
T
R
O
L

P

C

B
O
A
R
D

BLK

J1-1

J1-2

J1-1

J1-5

J1-10

J2-1

J2-6

J2-11

J3-1

J3-4

COM

N.O.

WHI

BLK
BLK

BLU-14

BLK-14

RED

BLK

BRN/BLK
WHI/BLU
WHI/RED

YEL
WHI/VIO
VIO
WHI/GRN

BREW SW

ON/OFF SW

HIDDEN SW

STATIC
SHIELD

PNK
GRN
WHI

BLK

COUNTER

(OPTIONAL)

CONTROL PANEL ASSY

LT FRNT SW

TOP FRNT SW

RT REAR SW

(NOTE – ALL WARMERS ARE NOT

AVAILABLE ON ALL MODELS!)

TOP REAR SW

LEVEL
PROBE

"KEEP WARM" HEATER

WHI/RED

LT REAR SW

RT FRNT SW

BREW STATION WARMER

(CONTROLLED BY ON/OFF SW)

DISPENSE

WHI/GRN

P2

BRN/BLK

VIO

P2

YEL YEL

WHI/VIO

P3

BRN/BLK

(SEE TABLE BELOW FOR USAGE)

P3

(SEE TABLE BELOW FOR USAGE)

WHI/VIO

(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)

WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS

WHI

REFILL

WHI/BLU

SOL

VIO

WHI

WHI

WARMER ASSY "A"

FRONT WARMER

REAR WARMER

WARMER ASSY "B"

FRONT WARMER

REAR WARMER

WARMER WIRING REFERENCE

SOL

WHI

W

H

WHI

W

H

I

WHI

I

LEFT

–

"B"

–
"B"
"B"

–

P1

WHI

P1, P2, &

P3 ARE

PINS OF A
POLARIZED
THREE-PIN

CONNECTOR.

P1

TOP

"A"

–
–

–
"A"
"A"

RED

RED

RED

WHI

RIGHT

–

–
"A"
"A"

–
"B"

J5-1

BLK

t°

29077.0001C 02/04 ©1998 BUNN-O-MATIC CORPORATION

Page 34

200V AC

2 WIRE

SINGLE PHASE

35582 021604

L1

MAIN POWER

SWITCH

BLK-14

SCHEMATIC WIRING DIAGRAM

CDBCP DB/CDBCFP DB

LIMIT

THERMOSTAT

BLU-14

BLK-14

TANK HEATER

L2

GRN

WHI-14

C
O
N
T
R
O
L

P

C

B
O
A
R
D

BLK

J1-1

J1-2

J1-1

J1-5

J1-10

J2-1

J2-6

J2-11

J3-1

J3-4

COM
N.O.

WHI

BLK
BLK

BLU-14

BLK-14

WHI

BLK

BRN/BLK

WHI/BLU

WHI/RED
YEL

WHI/VIO

VIO

WHI/GRN

BREW SW

ON/OFF SW

HIDDEN SW

PNK
GRN
WHI

BLK

COUNTER

(OPTIONAL)

CONTROL PANEL ASSY

STATIC
SHIELD

(NOTE – ALL WARMERS ARE NOT

AVAILABLE ON ALL MODELS!)

LT FRNT SW

TOP FRNT SW

RT REAR SW

LEVEL
PROBE

"KEEP WARM" HEATER

WHI/RED

LT REAR SW

TOP REAR SW

RT FRNT SW

BREW STATION WARMER

(CONTROLLED BY ON/OFF SW)

DISPENSE

WHI/GRN

P2

BRN/BLK

VIO

YEL YEL

WHI/VIO

BRN/BLK

(SEE TABLE BELOW FOR USAGE)

P3

P2

(SEE TABLE BELOW FOR USAGE)

P3

WHI/VIO

(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)

WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS

WHI

REFILL

WHI/BLU

SOL

VIO

WHI
WHI

WARMER ASSY "A"

FRONT WARMER

REAR WARMER

WARMER ASSY "B"

FRONT WARMER

REAR WARMER

WARMER WIRING REFERENCE

SOL

WHI

W
H

WHI

W

H

I

WHI

I

LEFT

–

"B"

–
"B"
"B"

–

P1

WHI

P1, P2, &

P3 ARE

PINS OF A
POLARIZED
THREE-PIN

CONNECTOR.

P1

TOP

"A"

–
–

–
"A"
"A"

WHI

WHI

WHI

WHI

RIGHT

–

–
"A"
"A"

–
"B"

J5-1

BLK

t°

29077.0004B 02/04 ©2003 BUNN-O-MATIC CORPORATION

Page 35

100V AC

2 WIRE

SINGLE PHASE

35582 021604