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is no longer current.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: (217) 529-6601 FAX: (217) 529-6644
35582.0000C
02/04 ©2003 Bunn-O-Matic Corporation
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
! 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
# 00656.0000
# 00658.0000
!
WARNING
DISCARD DECANTER
IF:
° CRACKED
° SCRATCHED
° BOILED DRY
° HEATED WHEN EMPTY
° USED ON HIGH FLAME
OR EXPOSED ELECTRIC
ELEMENTS
FUNNEL CONTENTS
ARE HOT
READ THE ENTIRE OPERATING MANUAL
BEFORE USING THIS PRODUCT
FAILURE TO COMPLY RISKS INJURY
PN: 00658.0000F 6/98 © 1985 BUNN-O-MATIC CORPORATION
# 12364.0000
# 10044.0000
35582 041503
Page 3
ELECTRICAL REQUIREMENTS
CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.
Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single
phase, 60 Hz.
L2 RED
WHITE
120V.A.C.
WHITE
NEUTRAL
L1 BLACK
120V.A.C.
208 or 240V.A.C.
120V.A.C.
NEUTRAL
L1 BLACK
Model 20 requires 2-wire, grounded service rated
Model 35 requires 3-wire, grounded service rated
120 volts ac, 20 amp, single phase, 60 Hz. Proceed as 120/208 or 120/240 volts ac, 20 amp, single phase, 60
follows:
Hz. Proceed as follows:
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
1
and620kPa)froma ⁄2"orlargersupplyline. Ashut-offvalveshouldbeinstalledinthelinebeforethebrewer. 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
1
inlet fitting is ⁄4" flare. Bunn-O-Matic does not recommend the use of a reverse-osmosis or deionized water supply
to this equipment.
1
3
NOTE - Bunn-O-Matic recommends ⁄4" copper tubing for installations of less than 25 feet and ⁄8" for more than
1
25 feet from the ⁄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.
35582 091503
Page 4
OPERATING CONTROLS
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
brewstationwarmer. Stoppingabrewcycleafterithasbeenstarted
will not stop the flow of water into the decanter until the funnel is
empty.
NOTE – Hot water will be available at the faucet in a limited amount
whenthe"ON/OFF"indicatorisnotglowingbecausethetankwillnot
refill.
P1626
(CDBC models)
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.
TEMP
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.
P 2642
(SINGLE CD models)
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 tempera-
ture setting. Two indicators will glow when the temperature is
between them.
35582 041503
Page 5
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
2forCDBCmodelsand128ounces 2forSINGLECDmodels.Refertotheadjustmentssectionofthismanual
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.
35582 041503
Page 6
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.
35582 041503
Page 7
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
Thebrewerisfactorysetwiththebrewlockoutdisabled.Brewlockoutpreventsstartingabrewcycleiftheready
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"switchandthe"HIDDEN"switchbeneaththe"®"forfiveseconds, theentirebankoftemperatureindicators
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 adjust-
ments.
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.
35582 041503
Page 8
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.
35582 021604
Page 9
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 set-
by-example process.
1. First set the brew volume using the standard procedure in Brew Volume Setup.
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. PressandholdtheOFF/ONbutton.Thebrewvalvewillturnonafter10seconds.Releasethebutton.Thisbegins
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. Thesprayisnowonagainandtheremainingontimesettinghasbegun. PresstheOFF/ONbuttonmomentarily
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
cyclesuntilthebrewvolumeofstep1iscomplete. PressingtheOFF/ONbuttonagainwillterminatethebrewing
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.
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.
35582 041503
Page 10
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, andrepairofelectricalequipmentshouldbeperformedonlybyqualifiedservicepersonnel.
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.
Theuseoftwowrenchesisrecommendedwheneverplumbingfittingsaretightenedorloosened. Thiswillhelp
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. Makesurethereisanyloninsulatingwasherundereachscrewheadthatholdsthecontrolboardtotheplastic
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.
35582 041503
Page 11
TROUBLESHOOTING (cont.)
REFILL CIRCUIT
PROBLEM
PROBABLE CAUSE
REMEDY
Will not fill or refill
1. Power off to brewer
Presswarmerswitchesoncontrol
panel to determine if power is ON.
2. Water shut off
3. Display flashing
Make sure water is ON.
Brewer has shut down due to
malfunction(SeeDiagnosticChart
in manual, Page 21, or under top
lid of brewer).
4. ON/OFF Switch
Make sure ON/OFF Switch is "ON"
and indicator is lit.
5. Lime build up on Probe
Remove the Probe and check for
lime deposit on tip. Clean and
reinstall.
6. Refill Valve or Control Board
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
notpresent,replacetherefillvalve
(See page 29). If continuity is
present, the coil may be stuck
closed. Shut water off to brewer.
SettheON/OFFswitchtothe"OFF"
position.Openthefaucetanddrain
water down in the tank until flow
stops or slows to a trickle. Attach
a voltmeter to the terminals of the
refillsolenoid.Connectthebrewer
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.
Reset the Water Sensing Thresh-
old Adjustment Procedures on
page 9.
7. Water is too conductive for
proper operation when using the
factory setting of sensing thresh-
old.
35582 041503
Page 12
TROUBLESHOOTING (cont.)
REFILL CIRCUIT (cont.)
PROBABLE CAUSE
PROBLEM
REMEDY
Fill or refill does not shut "OFF"
(ON/OFF Switch "ON")
1. Lime build up on probe
Remove Probe and check for lime
depositsontip.Cleanandreinstall.
2.WaterLevelProbeSensingSys-
tem
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
temperatureprobeandpin4ofthe
plug,continuityshouldbepresent.
Connect the J3 plug to the control
board and proceed to step 3.
3. Refill valve or control board
Press ON/OFF switch to "ON" (In-
dicator lamp should be lit). If wa-
ter 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 sole-
noid. (See page 29)
4. Water is too conductive for
proper operation when using the
factory setting of sensing thresh-
old.
Reset the Water Sensing Thresh-
old Adjustment Procedures on
page 9.
Fill or refill does not shut "OFF"
(ON/OFF Switch "OFF")
1. Refill valve or control board
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 re-
moved, replace the control board.
(See page 23)
35582 091503
Page 13
TROUBLESHOOTING (cont.)
HEATING CIRCUIT
PROBLEM
PROBABLE CAUSE
REMEDY
Water does not heat to proper
temperature
1. Display flashing
Brewer has shut down due to mal-
function (See Diagnostic Chart in
manual,Page21,orundertoplid).
IMPORTANT: Make sure no tem-
perature tests are taken before the
ready light is "ON". Tank tempera-
turemustbestabilizedbeforeread-
ings are taken.
Removeprobeandgrommet.Look
into hole on tank lid. Water must
be within one inch from top of
tank.
2. Water not touching tempera-
ture probe
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 pro-
ceed to step 4.
3. Dry Plug In Probe Sensing Sys-
tem
35582 091503
Page 14
TROUBLESHOOTING (cont.)
HEATING CIRCUIT (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Water does not heat to proper
temperature (cont.)
4. Temperature Probe
Removetheprobefromthegrom-
met and submerge in a water bath
ofapproximately70°F(21°C).Con-
nect an ohmmeter to pins 3 and 4
oftheJ3connector.At60°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, recon-
nect the J3 plug to the control
board.
IMPORTANT: Make sure no tem-
perature tests are taken before the
ready light is "ON". Tank tempera-
turemustbestabilizedbeforeread-
ings are taken.
5. Limit Thermostat
6. Tank Heater
Disconnect the brewer from the
power source. Check for continu-
ity across the limit thermostat ter-
minals. Continuity should be
present. If not replace the limit
thermostat.(See page 26)
Disconnect the brewer from the
power source. Check for continu-
ity between the white terminal of
the terminal block (or Red termi-
nal 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
ispresent,checkforawiringprob-
lem, 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
Inspect probe and tank assembly
forexcessivelimedeposits.Delime
as required.
35582 041503
Page 15
TROUBLESHOOTING (cont.)
HEATING CIRCUIT (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Spitting or excessive steaming
(cont.)
2. Temperature Probe
Removetheprobefromthegrom-
met and submerge in a water bath
ofapproximately70°F(21°C).Con-
nect an ohmmeter to pins 3 and 4
oftheJ3connector.At60°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, recon-
nect the J3 plug to the control
board.
3. Control Board
Set the temperature to 200°F
(93°C). Let tank temperature sta-
bilize. If temperature in tank is
abovetemperaturesettingbymore
than 7°F(3.9°C), replace the con-
trol board.(See page 23)
Brewer is making unusual noises
1. Plumbing lines
2. Water supply
3. Lime build up
Plumbing lines should not rest on
the counter top.
The brewer must be connected to
a cold water supply.
Remove the tank lid and clean
insideoftankwithadelimingagent,
if necessary.
35582 041503
Page 16
TROUBLESHOOTING (cont.)
BREWING CIRCUIT
PROBLEM
PROBABLE CAUSE
REMEDY
Brew cycle will not start
1. Display flashing
Brewer has shut down due to
malfunction(SeeDiagnosticChart
in manual, Page 21, or under top
lid of brewer).
2. No water
Water lines and valves to the
brewer must be open.
3.Nopowerorincorrectvoltageto
the brewer
Check for voltage across the black
and white terminals at the termi-
nal block.
4. ON/OFF switch not in the "ON"
position
The indicator lamp must be lit
5. Low water temperature (Brew
lockout is enabled)
Allow brewer to heat until ready
lamp is lit, or disable the brew
lockout feature. (See page 8)
6. Water not touching refill probe
inside tank
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
Disconnect the brewer from the
power source. Disconnect the rib-
bon connector from the control
board. Check for continuity be-
tween pins 1 & 2 (An arrow on the
connector indicates pin 1). No
continuityshouldbepresent.Press
the BREW switch. Continuity
should be present for as long as
the switch is held "ON". If no con-
tinuity is present, replace the
switchmembranedecal.(Seepage
24)
35582 041503
Page 17
TROUBLESHOOTING (cont.)
BREWING CIRCUIT (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Brew cycle will not start (cont.)
8. Control board or dispense valve
If the switch panel is operating
properly, proceed as follows. At-
tach 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 sole-
noid coil. If continuity is not
present, replace the solenoid (See
page 25). If continuity is present,
the valve may be stuck closed.
Consistently low beverage level in
the dispenser or beverage over-
flows dispenser
1. Brew volume
Set up brewer according to in-
structionsinsection 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.
Ifserviceiseverneededagain,use
the time as reference to determine
if time has changed.
2. Lime build up
3. Dispense Valve
Inspect the dispense valve and
spray head for excessive lime de-
posits. Delime as required.
Remove dispense valve and clear
any obstructions. Rebuild or re-
placevalveifnecessary.(Seepage
25)
35582 041503
Page 18
TROUBLESHOOTING (cont.)
BREWING CIRCUIT (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Dripping from spray head
1. Lime build up
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
2. Dispense valve
Remove the dispense valve and
clear any obstructions. Rebuild or
replacethevalveifnecessary.(See
page 25)
Weak beverage
1. Sprayhead
A clean spray-head must be used
for proper extraction.
2. Water temperature
Place an empty brew funnel on an
empty decanter beneath the
sprayhead. Initiatebrewcycleand
check the water temperature im-
mediately below the sprayhead
with a thermometer. The reading
mustnotbelessthan195°F(91°C).
Adjust the temperature setting to
increase the water temperature.
RefertoInitialSet-upinstructions.
3. Filter type
BUNN® paper filters must be used
for proper extraction.
4. Coffee grind
5. Funnel loading
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.
35582 041503
Page 19
TROUBLESHOOTING (cont.)
BREWING CIRCUIT (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Dry coffee grounds remain in the
funnel
1. Sprayhead
Make sure sprayhead is present
and holes are clear and unob-
structed.
2. Funnel loading
1. Warmer
The BUNN® paper filter must be
centered in the funnel and the bed
ofgroundsleveledbyshakinggen-
tly.
Low beverage serving tempera-
ture
Disconnect the brewer from the
powersource.Removethewarmer
plate and turn upside down to ex-
pose the warmer terminals. Re-
move the two wires. Check for
continuity across the two warmer
terminals. If continuity is not
present, replace the warmer ele-
ment (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. Volt-
age should be present at the ter-
minals. If not, disconnect power
supply and check wiring and
switch.
35582 041503
Page 20
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
2
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
Low Tank Level Fault -
Level probe dry for 7 minutes after fill valve is energized
Water pressure (Is water shut "OFF")
Level probe wiring
Temperature probe wiring
Fill valve wiring, function, & strainer
3
4
Low Water Temperature Fault -
Sensor in tank is calling for heat for 30 minutes or more
Tank heater wiring & function
Temperature probe wiring
Tank Sensor Disagreement -
Level probe detects water, but dry plug-in probe dry
Temperature probe wiring
Level probe wiring
Green wire between tank and circuit board
5
6
Temp Sensor Out-of-Range - High
Temp Sensor Out-of-Range - Low
Sensor not connected to circuit board
Sensor wires shorted together or to chassis
35582 041503
Page 21
SERVICE
This section provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel. The brewer should be unplugged
when servicing, except when electrical tests are re-
quired 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 replace-
ment of any component.
All components are accessible by the removal of
the top cover or warmer housing, front access panel
and warmer plate(s).
P2675
FIG. 1 COMPONENT ACCESS
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
35582 041503
Page 22
SERVICE (cont.)
CONTROL BOARD
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 wash-
ers 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 #4-
40 screws to the end cap assembly.
ES ARE HOT
FAC
WARMERS AND SU
N
:
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 con-
nector from the main wiring harness.
8. Connectthebluewireandblackwiretotherelayon
the control board.
UTIO
CA
P1846
FIG. 2 CONTROL BOARD
Location:
The Control Board is located inside the top cover
behind the front end cap.
9. Refer to CDBC , SINGLE CD Adjustments and
Optional Settings to program the new control
board.
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
threesections,RefillCircuit,HeatingCircuit,andBrew-
ing Circuit.
35582 041503
Page 23
SERVICE (cont.)
SWITCH PANEL
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 Removeanyadhesivethatremainsontheendcap.
5. Removetheadhesivebackingfromthenewswitch
panel. Inserttheribbonconnectorthroughtheslot
intheendcapandapplytheswitchpaneltotheend
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.
P1848
FIG. 3 SWITCH PANEL
Location:
The Switch Panel is located in the front of the
hood.
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 Troubleshoot-
ing guide beginning on page 11. The troubleshooting
guide is divided into three sections, Refill Circuit,
Heating Circuit, and Brewing Circuit.
35582 041503
Page 24
SERVICE (cont.)
DISPENSE VALVE
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 de-
fective. Replace valve and test again to verify repair.
If voltage is not present as described, refer to Wiring
Diagrams and check the brewer wiring harness. Also
check the control board for proper operation. See
Page 23.
WARMERS AND SURE HOT
:
N
TIO
U
A
C
Removal and Replacement:
P1852
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.
FIG. 4 DISPENSE VALVE
Location:
The dispense valve is located inside the top cover
behind the front end cap.
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.
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 lock-
out, 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.
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. Removethedispensevalveandinspectfor
wear, and remove waterborne particles.
P1853
FIG. 5 DISPENSE VALVE WIRING
If the sound is not heard as described, proceed to #6.
35582 041503
Page 25
SERVICE (cont.)
LIMIT THERMOSTAT
Removal and Replacement:
1. Remove the black and blue wires from limit ther-
mostat 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
BLK from Terminal
Block
P1800
Location:
FIG. 7 LIMIT THERMOSTAT WIRING
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. Withanohmmeter,checkforcontinuityacrossthe
limit thermostat terminals.
If continuity is present as described, the limit thermo-
stat is operating properly.
If continuity is not present as described, replace the
limit thermostat.
35582 041503
Page 26
SERVICE (cont.)
TANK HEATER
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.
P1855
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.
FIG. 8 TANK HEATER
Location:
The tank heater is located inside the tank and
secured to the tank bottom.
8. Disconnect the pink wire from the level probe.
9. Disconnectthegreenwirefromthetopofthetank.
10. Disconnect the limit thermostat from the side of
the tank.
11. Disconnect the two white wires from the tank
warmer blanket.
12. Disconnecttheblackwireandthewhiteorredwire
from the tank heater terminals.
13. Remove the four #8-32 nuts securing the tank to
the mounting brackets and remove the tank as-
sembly.
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
be120voltsacfortwowire120voltmodelsor240
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.
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.
4. Disconnecttheblackwireandthewhitewireorred
wire from the tank heater terminals.
5. Check for continuity across the tank heater termi-
nals.
35582 041503
Page 27
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. Connectthelimitthermostattothefrontofthetank
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 grom-
met in the tank lid.
24. Install the elbow fitting of the vent hose into the
grommet in the tank lid.
BLK to Control Board
WHI or RED to Terminal
Block
25. On brewers with faucet, connect the outlet water
line of the faucet to the side of the tank and secure
with clamp.
P1856
FIG. 9 TANK HEATER WIRING
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
valvetothesideofthetankandsecurewithclamp.
28. Refer to FIG. 9 when reconnecting the tank heater
wires.
29. Install access panels and covers and refer to Initial
Set-up for refill and operation.
35582 041503
Page 28
SERVICE (cont.)
REFILL VALVE
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.
ERS AND SURFACOT
WARM
N
:
TIO
AU
C
Ifthe soundis notheardas described, replacetherefill
valve.
P1857
FIG. 10 REFILL VALVE
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.
Location:
The refill valve is located inside the trunk on the
lower center part of the component bracket.
4. Remove the two 1/4"-20 screws securing the refill
valvemountingbracket tothecomponentbracket.
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.
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.
7. Refer to FIG. 11 when reconnecting the wires.
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 Wiring
Diagrams and check brewer wiring harness.
WHI from Terminal
Block
5. Check for continuity across the refill valve coil
terminals.
WHI/BLU from
Control Board
P1858
If continuity is present as described, reconnect the
white and white/blue wires from the circuit board.
FIG. 11 REFILL VALVE WIRING
35582 041503
Page 29
SERVICE (cont.)
WARMER ELEMENT(S)
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to Wiring
Diagrams and check brewer wiring harness.
5. Check the continuity across the two terminals on
the warmer element.
Ifcontinuityispresentasdescribed,reconnectthetwo
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 ele-
ment terminals.
P2675
4. Remove the two #8-32 nuts securing the warmer
element to the warmer plate.
5. Securely install new warmer element.
6. Reconnectthetwowirestowarmerelementtermi-
nals.
7. Securely install warmer assembly on the brewer.
8. Refer to the Wiring Diagrams when reconnecting
the wires.
FIG. 12 WARMER ELEMENTS
Location:
The warmerelement(s)islocatedunderthewarmer
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" posi-
tion. 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.
35582 041503
Page 30
SCHEMATIC WIRING DIAGRAM CDBC - 15, 20 & 35
L1
N
L2
GRN
LIMIT
THERMOSTAT
WHI-14 (MODELS 15 & 20)
RED-14 (MODEL 35)
TANK HEATER
BLU-14
BLK-14
BLK-14
"KEEP WARM" HEATER
WHI
WHI
BREW STATION WARMER
(CONTROLLED BY ON/OFF SW)
BLK
WHI/RED
WHI
WHI
COUNTER
(OPTIONAL)
REFILL
SOL
BLK
BLK
BLU-14
BLK-14
WHI/BLU
J1-1
J1-2
DISPENSE
SOL
C
O
N
T
WHI
WHI
WHI/GRN
COM
N.O.
WHI
BLK
R
O
L
J1-1
WARMER ASSY "A"
P2
P3
FRONT WARMER
P1
BRN/BLK
BRN/BLK
VIO
BRN/BLK
WHI
WHI
P
C
WHI/BLU
WHI/RED
YEL
WHI/VIO
VIO
J1-5
W
H
I
P1, P2, &
P3 ARE
PINS OF A
POLARIZED
THREE-PIN
CONNECTOR.
(SEE TABLE BELOW FOR USAGE)
B
O
A
R
D
REAR WARMER
VIO
WHI/GRN
J1-10
J2-1
WARMER ASSY "B"
CONTROL PANEL ASSY
BREW SW
LT FRNT SW LT REAR SW
P2
P1
FRONT WARMER
YEL
YEL
WHI
WHI
(SEE TABLE BELOW FOR USAGE)
ON/OFF SW TOP FRNT SW TOP REAR SW
HIDDEN SW RT REAR SW RT FRNT SW
W
H
I
REAR WARMER
WHI/VIO
P3
WHI/VIO
J2-6
WARMER WIRING REFERENCE
(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)
LEFT
–
"B"
–
"B"
"B"
–
TOP
"A"
–
–
–
"A"
"A"
RIGHT
–
–
"A"
"A"
–
(NOTE – ALL WARMERS ARE NOT
AVAILABLE ON ALL MODELS!)
STATIC
SHIELD
WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS
J2-11
J3-1
PNK
GRN
WHI
BLK
LEVEL
PROBE
"B"
J3-4
J5-1
BLK
120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE
SINGLE PHASE
t°
35582 041503
Page 31
SCHEMATIC WIRING DIAGRAM CDBCP/CDBCPF - 15, 20 & 35
L1
N
L2
W/Flashing Lamp (Freshness)
GRN
LIMIT
THERMOSTAT
WHI-14 (MODELS 15 & 20)
RED-14 (MODEL 35)
TANK HEATER
BLU-14
BLK-14
BLK-14
"KEEP WARM" HEATER
WHI
WHI
BLK
BREW STATION WARMER
(CONTROLLED BY ON/OFF SW)
WHI/RED
WHI
WHI
WHI
REFILL
SOL
RED
BLK
BLU-14
BLK-14
WHI/BLU
TRM-1
TRM-2
DISPENSE
SOL
C
O
N
T
R
O
L
WHI/GRN
COM
N.O.
WHI
BLK
J1-1
WHI
WHI
BRN/BLK
P
C
WARMER ASSY "A"
WHI/BLU
WHI/RED
YEL
WHI/VIO
VIO
J1-5
P2
P3
FRONT WARMER
P1
BRN/BLK
WHI
BRN/BLK
B
O
A
R
D
W
H
I
P1, P2, &
P3 ARE
PINS OF A
POLARIZED
THREE-PIN
CONNECTOR.
(SEE TABLE BELOW FOR USAGE)
WHI/GRN
J1-10
J2-1
CONTROL PANEL ASSY
REAR WARMER
VIO
VIO
BREW SW
LT FRNT SW LT REAR SW
WARMER ASSY "B"
P2
P1
FRONT WARMER
YEL
ON/OFF SW TOP FRNT SW TOP REAR SW
HIDDEN SW RT REAR SW RT FRNT SW
YEL
WHI
WHI
J2-6
(SEE TABLE BELOW FOR USAGE)
W
H
I
REAR WARMER
WHI/VIO
P3
WHI/VIO
(NOTE – ALL WARMERS ARE NOT
AVAILABLE ON ALL MODELS!)
STATIC
SHIELD
J2-11
J3-1
WARMER WIRING REFERENCE
(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)
PNK
GRN
WHI
BLK
LEFT
–
"B"
–
"B"
"B"
–
TOP
"A"
–
–
–
"A"
"A"
RIGHT
–
–
"A"
"A"
–
LEVEL
PROBE
WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS
J3-4
J5-1
BLK
t°
"B"
120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE
SINGLE PHASE
35582 041503
Page 32
SCHEMATIC WIRING DIAGRAM
SINGLE CD - 15, 20 & 35
L1
N
L2
GRN
LIMIT
THERMOSTAT
WHI-14 (MODELS 15 & 20)
RED-14 (MODEL 35)
TANK HEATER
BLU-14
BLK-14
BLK-14
"KEEP WARM" HEATER
WHI
WHI
BREW STATION WARMER
(CONTROLLED BY ON/OFF SW)
BLK
WHI/RED
WHI
WHI
COUNTER
(OPTIONAL)
REFILL
SOL
BLK
BLK
BLU-14
BLK-14
WHI/BLU
TRM1
TRM2
DISPENSE
SOL
C
O
N
T
WHI
WHI
WHI/GRN
COM
N.O.
WHI
BLK
R
O
L
J1-1
P2
P1
BRN/BLK
BRN/BLK
VIO
WHI
P
C
WHI/BLU
WHI/RED
YEL
WHI/VIO
VIO
J1-5
P3
P1, P2, &
P3 ARE
PINS OF A
POLARIZED
THREE-PIN
CONNECTOR.
B
O
A
R
D
WHI/GRN
P2
P3
J1-10
J2-1
YEL
CONTROL PANEL ASSY
BREW SW
P1
WHI
WHI/VIO
NO CONNECTION THIS APPLICATION
ON/OFF SW
HIDDEN SW
J2-6
1 GAL
1/2 GAL
(NOTE – ALL WARMERS ARE NOT
AVAILABLE ON ALL MODELS!)
STATIC
SHIELD
J2-11
J3-1
PNK
GRN
WHI
120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE
SINGLE PHASE
LEVEL
PROBE
BLK
J3-4
J5-1
BLK
t°
35582 041503
Page 33
SCHEMATIC WIRING DIAGRAM
L1
L2
CDBCP DB/CDBCFP DB
GRN
MAIN POWER
SWITCH
LIMIT
THERMOSTAT
TANK HEATER
BLU-14
RED-14
BLK-14
BLK-14
"KEEP WARM" HEATER
WHI/RED
WHI
WHI
BREW STATION WARMER
(CONTROLLED BY ON/OFF SW)
RED
RED
BLK
WHI
COUNTER
(OPTIONAL)
REFILL
SOL
BLK
BLK
WHI/BLU
J1-1
J1-2
DISPENSE
SOL
C
O
N
T
R
O
L
WHI
WHI
BLU-14
BLK-14
WHI/GRN
P2
COM
N.O.
RED
BLK
RED
J1-1
WARMER ASSY "A"
FRONT WARMER
P1
BRN/BLK
BRN/BLK
BRN/BLK
WHI
WHI
P
C
WHI/BLU
WHI/RED
YEL
J1-5
W
H
I
P1, P2, &
P3 ARE
PINS OF A
(SEE TABLE BELOW FOR USAGE)
WHI/VIO
B
O
A
R
D
P3
REAR WARMER
VIO
VIO
YEL
VIO
POLARIZED
THREE-PIN
CONNECTOR.
WHI/GRN
J1-10
J2-1
WARMER ASSY "B"
CONTROL PANEL ASSY
BREW SW
LT FRNT SW LT REAR SW
P2
P1
FRONT WARMER
YEL
WHI
WHI
(SEE TABLE BELOW FOR USAGE)
ON/OFF SW TOP FRNT SW TOP REAR SW
HIDDEN SW RT REAR SW RT FRNT SW
W
H
I
REAR WARMER
WHI/VIO
P3
WHI/VIO
J2-6
WARMER WIRING REFERENCE
(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)
LEFT
–
"B"
–
"B"
"B"
–
TOP
"A"
–
–
–
"A"
"A"
RIGHT
–
–
"A"
"A"
–
(NOTE – ALL WARMERS ARE NOT
AVAILABLE ON ALL MODELS!)
STATIC
SHIELD
WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS
J2-11
J3-1
PNK
GRN
WHI
BLK
LEVEL
PROBE
"B"
J3-4
J5-1
BLK
200V AC
2 WIRE
SINGLE PHASE
t°
35582 021604
Page 34
SCHEMATIC WIRING DIAGRAM
L1
L2
CDBCP DB/CDBCFP DB
GRN
MAIN POWER
SWITCH
LIMIT
THERMOSTAT
TANK HEATER
BLU-14
WHI-14
BLK-14
BLK-14
"KEEP WARM" HEATER
WHI/RED
WHI
WHI
BREW STATION WARMER
(CONTROLLED BY ON/OFF SW)
WHI
WHI
BLK
WHI
COUNTER
(OPTIONAL)
REFILL
SOL
BLK
BLK
WHI/BLU
J1-1
J1-2
DISPENSE
SOL
C
O
N
T
R
O
L
WHI
WHI
BLU-14
BLK-14
WHI/GRN
P2
COM
N.O.
WHI
BLK
WHI
J1-1
WARMER ASSY "A"
FRONT WARMER
P1
BRN/BLK
BRN/BLK
BRN/BLK
WHI
WHI
P
C
WHI/BLU
WHI/RED
YEL
J1-5
W
H
I
P1, P2, &
P3 ARE
PINS OF A
(SEE TABLE BELOW FOR USAGE)
WHI/VIO
B
O
A
R
D
P3
REAR WARMER
VIO
VIO
YEL
VIO
POLARIZED
THREE-PIN
CONNECTOR.
WHI/GRN
J1-10
J2-1
WARMER ASSY "B"
CONTROL PANEL ASSY
BREW SW
LT FRNT SW LT REAR SW
P2
P1
FRONT WARMER
YEL
WHI
WHI
(SEE TABLE BELOW FOR USAGE)
ON/OFF SW TOP FRNT SW TOP REAR SW
HIDDEN SW RT REAR SW RT FRNT SW
W
H
I
REAR WARMER
WHI/VIO
P3
WHI/VIO
J2-6
WARMER WIRING REFERENCE
(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)
LEFT
–
"B"
–
"B"
"B"
–
TOP
"A"
–
–
–
"A"
"A"
RIGHT
–
–
"A"
"A"
–
(NOTE – ALL WARMERS ARE NOT
AVAILABLE ON ALL MODELS!)
STATIC
SHIELD
WITH TOP WARMERS
WITH LEFT WARMERS
WITH RIGHT WARMERS
WITH LEFT & RIGHT WARMERS
WITH LEFT & TOP WARMERS
WITH RIGHT & TOP WARMERS
J2-11
J3-1
PNK
GRN
WHI
BLK
LEVEL
PROBE
"B"
J3-4
J5-1
BLK
100V AC
2 WIRE
SINGLE PHASE
t°
35582 021604
Page 35
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