C, CS, CT, CWTF,
CRT, CRTF Series
Including
DV, MV, APS/TC/TS,
Single CW & Twins
Supercedes Service Manual: 41711.0000
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
PHONE: (217) 529-6601 FAX: (217) 529-6644
41711.0001B 05/12 ©2009 Bunn-O-Matic Corporation
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers
and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor.
2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labor for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts
and labor for 4 years or 40,000 pounds of coffee, whichever comes first.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be
commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the
applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured
by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation,
improper maintenance or repair, non periodic cleaning and descaling, equipment failures related to poor water quality,
damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but
not limited to user replaceable parts such as seals and gaskets. This warranty is conditioned on the Buyer 1) giving BUNN
prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office
Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an
authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under
warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make
modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such
individuals, whether oral or written, do not constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the
applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair
is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for
the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS
EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION
AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of
use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities
or services, or any other special, incidental or consequential damages.
392, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN
Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic,
Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design, Cool Froth, DBC, Dr. Brew stylized Dr. design,
Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment Worldwide, Respect Earth, Respect Earth with
the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com, Scale-Pro, Silver Series, Single, Smart Funnel,
Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in Beverage Equipment Worldwide, ThermoFresh,
Titan, trifecta, Velocity Brew, A Partner You Can Count On, Air Brew, Air Infusion, Beverage Bar Creator, Beverage Profit
Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer
Control, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Tea At Its Best, The Horizontal Red Line, Ultra are
either trademarks or registered trademarks of Bunn-O-Matic Corporation.
Page 2
41711.1 030912
Contents
Trouble Shooting .............................................................................................................. 4
Component Access ........................................................................................................ 10
Control Thermostat ........................................................................................................ 10
Electronic Thermostat .................................................................................................... 11
ON/OFF Switch ............................................................................................................... 12
Start Switch (Brew) ........................................................................................................ 13
Solenoid (Inlet) .............................................................................................................. 14
Tank Heater .................................................................................................................... 16
Fill Basin ........................................................................................................................ 16
Tank Heater Switch ........................................................................................................ 18
Thermal Cut-Off ............................................................................................................. 20
Coil/Faucet ..................................................................................................................... 21
Limit Thermostat ............................................................................................................ 22
Recovery Booster ........................................................................................................... 23
Timer (Early Model) ....................................................................................................... 24
Freshness Timer (Early Models)..................................................................................... 25
Digital Brew Timer (Late Model) .................................................................................... 26
Warmer Elements........................................................................................................... 28
Schematic Wiring Diagrams .......................................................................................... 29
Page 3
41711.1 052009
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,andrepairofelectricalequipmentshouldbeperformedonlybyqualiedservicepersonnel.
• Allelectroniccomponentshave120voltacandlowvoltagedcpotentialontheirterminals.Shortingof
terminals or the application of external voltages may result in board failure.
• Intermittentoperationofelectroniccircuitboardsisunlikely.Boardfailurewillnormallybepermanent.If
an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
• Solenoidremovalrequiresinterruptingthewatersupplytothevalve.Damagemayresultifsolenoidsare
energized for more than ten minutes without a supply of water.
• Theuseoftwowrenchesisrecommendedwheneverplumbingttingsaretightenedorloosened.Thiswill
help to avoid twists and kinks in the tubing.
• Makecertainthatallplumbingconnectionsaresealedandelectricalconnectionstightandisolated.
• Thisbrewerisheatedatalltimes.Keepawayfromcombustibles.
WARNING – • Exerciseextremecautionwhenservicingelectricalequipment.
• Unplugthebrewerwhenservicing,exceptwhenelectricaltestsarespecied.
• Followrecommendedserviceprocedures
• Replaceallprotectiveshieldsorsafetynotices
PROBLEM
Brew cycle will not start
PROBABLE CAUSE
1. No water
2. No power or incorrect voltage
to the brewer
REMEDY
Water lines and valves to the
brewer must be open.
(A1) Check the terminal block for
120 volts across the black and
white terminals on two wire 120
volt brewers.
(A2) Check the terminal block
for 120 volts across the red and
white terminals and the black
and white terminal on three wire
120/240 volt brewers.
(A3) Check the terminal block for
200 volts on "B Series" brewers
or 240 volts on "A Series" brewers across the red and black
terminals.
Page 4
(B) Check circuit breakers or
fuses.
41711.1 052009
TROUBLESHOOTING (cont.)
PROBLEM
Brew cycle will not start (cont.)
PROBABLE CAUSE
3. ON/OFF Switch
4. Start Switch
5. Timer
6. Solenoid Valve
7. Water strainer/flow control
(.222 GPM) Early models
REMEDY
Refer to Service - ON/OFF
Switch for testing.
Refer to Service - Start Switch
for testing procedures.
Refer to Service - Timer for testing procedures.
Refer to Service - Solenoid Valve
for testing procedures.
(A) Direction of flow arrow must
be pointing towards brewer.
(B) Remove the strainer/flow
control and check for obstructions. Clear or replace.
Water is not hot
1. Tank Heater Switch
2. (A) Limit Thermostat
(B) Thermal Cut-Off (Brewers
with Faucet)
CAUTION - Do not eliminate
or bypass limit thermostat or
thermal cut-off. Use only BOM
replacement parts.
3. Control Thermostat
4. Tank Heater
Refer to Service - Tank Heater
Switch for testing procedures.
Refer to Service - Limit Thermostat for testing procedures.
Thermal Cut-Off for testing
procedures.
Refer to Service - Control Thermostat for testing procedures.
Refer to Service - Tank Heater
for testing procedures.
Page 5
41711.1 052009
TROUBLESHOOTING (cont.)
PROBLEM
Inconsistent beverage level in
dispenser
PROBABLE CAUSE
1. Strainer /flow control (.222
GPM) Early models.
2. Syphon System
3. Lime Build-up
CAUTION - Tank and tank
components should be delimed
regularly depending on local water conditions. Excessive mineral build-up on stainless steel
surfaces can initiate corrosive
reactions resulting in serious
leaks.
REMEDY
(A) Direction of flow arrow must
be pointing towards the brewer.
(B) Remove the strainer/flow
control and check for obstruction. Clear or replace.
The brewer must be level or
slightly lower in front to syphon
properly.
Inspect the tank assembly for
excessive lime deposits. Delime
as required.
Consistently low beverage level
in the dispenser
Spitting or excessive steaming
4. Water Pressure
1. Timer
2. Strainer/flow Control (.222
GPM)
1. Lime Build-up
CAUTION - Tank and tank
components should be delimed
regularly depending on local water conditions. Excessive mineral build-up on stainless steel
surfaces can initiate corrosive
reactions resulting in serious
leaks.
Page 6
The water pressure to the
brewer must be at least 20 psi
(138 kPa).
Timer must be set for at least
two minutes and fifteen seconds.
(A) Direction of flow arrow must
be pointing towards brewer.
(B) Remove the strainer/flow
control and check for obstructions. Clear or replace.
Inspect tank assembly for excessive lime deposits. Delime as
required.
41711.1 052009
TROUBLESHOOTING (cont.)
PROBLEM
Spitting or excessive steaming
(cont.)
Dripping from sprayhead
PROBABLE CAUSE
2. Control Thermostat
1. Syphon System
2. Lime Build-up
CAUTION - Tank and tank components should be delimed
regularly depending on local
water conditions. Excessive mineral build-up on stainless steel
surfaces can initiate corrosive
reactions resulting in serious
leaks.
3. Solenoid Valve
REMEDY
Refer to Service - Control Thermostat for testing procedures.
The brewer must be level or
slightly lower in front to syphon
properly.
Inspect the tank assembly for
excessive lime deposits. Delime
as required.
Remove the solenoid valve and
clear any obstructions. Rebuild
or replace the valve if necessary.
Water flows into tank continuously (ON/OFF Switch "ON")
Water flows into tank continuously (ON/OFF Switch "OFF")
Beverage overflows dispenser
1. Timer
1. Solenoid Valve
1.Dispenser
2. Timer
3. Solenoid Valve
Refer to Service - Timer for testing procedures.
Remove the Solenoid Valve and
clean any obstruction. Rebuild
or replace the valve if necessary.
The dispenser must be completely empty before starting a
brew cycle.
Refer to Service - Timer for testing procedures.
Remove the Solenoid Valve and
clean any obstruction. Rebuild
or replace the valve if necessary.
Page 7
41711.1 052009
TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE
Weak beverage
1. Filter Type
2. Coffee Grind
3. Sprayhead
4. Funnel Loading
5. Water Temperature
REMEDY
BUNN® paper filters must be used
for proper extraction.
A fine or drip grind must be used
for proper extraction.
A six-hole stainless steel sprayhead must be used for proper
extraction.
The BUNN® paper filter must be
centered in the funnel and the
bed of ground leveled by gentle
shaking.
Place an empty funnel on an empty
dispenser beneath the sprayhead.
Initiate a brew cycle and check the
water temperature immediately
below the sprayhead with a thermometer. The reading should not
be less than 195°F (76°C). Adjust
the control thermostat to increase
the water temperature. Replace if
necessary.
Dry coffee grounds remain in
the funnel
Brewer is making unusal noises
1. Funnel Loading
1. Solenoid
2. Plumbing Lines
3. Water Supply
Page 8
The BUNN® paper filter must be
centered in the funnel and the
bed of grounds leveled by gently
shaking.
The nut on the solenoid must
be tight or it will vibrate during
operation.
Plumbing lines should not resting
on the counter top.
(A) The brewer must be connected
to a cold water line.
(B) Water pressure to the brewer
must not exceed 90 psi (620 kPa).
Install a regulator if necessary to
lower the working pressure to approximately 50 psi (345 kPa).
41711.1 052009
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Brewer is making unusal noises
(cont.)
Low beverage serving temperature
4. Tank Heater
1. Warmer
2. ON/OFF Switch
Remove and clean lime off the
tank heater.
Refer to Service - Warmer element for testing procedures.
Refer to Service - ON/OFF
Switch for testing procedures.
Page 9
41711.1 052009
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 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.
All components are accessible by the removal of
the top cover, front inspection panel, warmer plate(s)
and rear utility cover (Twins only).
CONTROL THERMOSTAT
3. Gently remove the capillary bulb and grommet
from the tank.
4. Check for continuity across the thermostat terminals. The indication must be:
a) Continuity with knob rotated fully clockwise.
b) No continuity with knob rotated fully counter-
clockwise. NOTE: First style does not have the ON/
OFF feature, simply check continuity.
If continuity is not present as described, replace control
thermostat.
If continuity is present as described, refer to the wiring
diagrams and check the brewer wiring harness.
Removal and Replacement:
1. Disconnect the control thermostat wires.
2. Remove the thermostat capillary bulb by firmly
pulling up on the capillary at the tank lid. This will
disengage the grommet from the tank lid.
3. Remove the one #8-32 screw securing the control
thermostat to the component bracket inside the
trunk.
4. Slide the grommet to the line 4.5" above the bulb
on the new capillary tube.
5. Insert the capillary bulb through the hole in the
tank lid and press the grommet firmly and evenly
so that the groove in the grommet fits into the tank
lid.
6. Carefully bend the capillary tube so that the tube
and bulb inside the tank are in the vertical position.
FIG. 10-1 CONTROL THERMOSTAT
Location:
The control thermostat is located inside the trunk
on the upper left side of the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the leads from control thermostat.
Page 10
NOTE - The capillary tube must be clear of any electrical termination and not kinked.
7. Using #8-32 screw(s), secure the control thermostat to the component bracket inside the trunk.
8. For first type thermostat, refer to Wiring Diagrams
when reconnecting thermostat wires.
9. Adjust the control thermostat as required.
NOTE: First type will only turn approximately one
turn. Clockwise to the stopper is approximately
180° F, maximum counterclockwise to stopper is
approximately 200° F.
Later types will be approximately 200° F when
turned maximum clockwise. Turning it counterclockwise until it clicks will turn off (open contacts).
41711.1 052009
SERVICE (cont.)
OPTIONAL ELECTRONIC THERMOSTAT (ERT):
The ERT is located inside the trunk on the upper left
side of the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Gently remove the temperature sensor and grommet from the tank.
3. Check voltage across the blue wire from limit
thermostat and the white wire at the terminal
block. Connect the brewer to the power source.
The indication must be: 120Vac.
If voltage is not present as described, refer to the wiring
diagrams and check the brewer wiring harness
If voltage is present as described, proceed to #4.
4. Disconnect the brewer from the power source.
5. With the temperature sensor and grommet still out
of the tank, check voltage across the black wire
to the heater and the white wire at the terminal
block. Connect the brewer to the power source.
The indication must be: 120Vac.
If voltage is not present as described, replace ERT.
If voltage is present as described, the ERT is functioning properly.
First Type
Second Type
Removal and Replacement:
1. Disconnect the control thermostat wires.
2. Remove the temperature sensor by firmly pullingup on the metal sheath at the tank lid. This will
disengage the grommet from the tank lid.
3. Remove the one #8-32 screw securing the ERT to
the component bracket inside the trunk.
4. Slide the grommet to the top of the sheath.
5. Insert the temperature sensor through the hole
in the tank lid and press the grommet firmly and
evenly so that the groove in the grommet fits into
the tank lid.
6. Using the #8-32 screw, secure the ERT to the
component bracket inside the trunk.
7. For first type thermostat, refer to Wiring Diagrams
when reconnecting ERT wires.
8. Adjust the ERT as required.
Page 11
Third Type
ERT
FIG 11-1 THERMOSTAT TERMINALS
NOTE: The ERT has a range of 170° - 210°F. Use care
not to set it too high or boiling could occur.
41711.1 052009
SERVICE (cont.)
ON/OFF WARMER SWITCH
FIG. 12-1 ON/OFF WARMER SWITCHES
Location:
The ON/OFF switch(s) are located on the front of
the hood.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Viewing the switch from the back remove the white
or red wire from the upper terminal and the black
wire from the center terminal.
3. Check the voltage across the white wire or red wire
and the black wire with a voltmeter. Connect the
brewer to the power source. The indication must
be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac for two wire 200 or 240 volt
models.
4. Disconnect the brewer from the power source.
Removal and Replacement:
1. Remove the wires from the switch terminals.
2. Compress the clips inside the hood and gently
push the switch through the opening.
3. Push the new switch into the opening and spread
the clips to hold switch in the hood.
4. Refer to Fig.7 when reconnecting the wires.
(3) WHI to Neutral or RED to L2
(2)BLKtoL1
(1) To Warmer
WARMER SWITCH
(1) LOAD (WARMER)
(2) LINE (L1)
(3) NEUTRAL (L2)
FIG. 12-2 WARMER SWITCH TERMINALS
If voltage is present as described, reconnect the white
or red wire and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagrams and check the brewer wiring harness.
5. With the black wire removed, remove the wire from
the lower terminal.
6. Check for continuity across the center and lower
terminal with the switch in the "ON" position.
Continuity must not be present when the switch
is in the "OFF" position.
If continuity is present as described, reconnect the
black wire to the center terminal and the remaining
wire to the lower terminal.
If continuity is not present as described, replace the
switch.
Page 12
41711.1 052009
SERVICE (cont.)
START SWITCHES
CT SERIES
CRT/CRTF
Test Procedure:
1. Disconnect the brewer from the power supply.
2. Disconnect the blue wire and the white/red wire
from the switch terminals.
3. Check for continuity across the two terminals on
the switch when it is held in the "pressed-in" position. Continuity must not be present across these
terminals in the released position.
If continuity is present as described, reconnect the blue
wire and the white/red to the switch terminals.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the blue wire and white/red from the start
switch.
2. Remove round retaining nut from the front of
the switch and remove switch and internal tooth
lockwasher from the inside of the hood.
3. Push new switch with internal tooth lockwasher
through the hole in the hood and secure with round
retaining nut.
4. Refer to Fig. 11 when reconnecting the wires.
FIG. 13-1 START SWITCH
Location: CRT/CRTF
On brewers w/out fresh light, the start switch is
located in the right front of the hood.
On brewers w/fresh light, the start switch is located
on the right side of the hood.
Location: CT/CWT/CWTF/TWINS
On most "CT" series brewers, the start switch is
located in the front of the hood.
On some "convertible" or "CS" brewers, the start
switch is located on either the right or left side of the
hood.
NOTE: Optional on the left and right side warmer
housings on 0/6 TWINS, connected in parallel to front
mounted start switches.
CRT/CRTF
WHI/RED to
Timer P3
BLU to Timer P1
CT/CWT/CWTF/TWINS
(3) WHI to Neutral or RED to L2
(2)BLKtoL1
START SWITCH
FIG. 13-2 START SWITCH TERMINALS
Page 13
41711.1 052009
SERVICE (cont.)
SOLENOID VALVES
EARLY MODELS LATE MODELS
FIG. 14-1 SOLENOID VALVE
Location:
The solenoid 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 black wires from the
solenoid valve. With the "ON/OFF" switch in the
"ON" upper position press the start switch.
3. Check the voltage across the white and black wires
with a voltmeter. Connect the brewer to the power
source. The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac for two wire 200 or 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 Wiring
Diagrams and check brewer wiring harness.
6. Check the solenoid 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 solenoid
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 solenoid valve, there may be a blockage in the water line before the solenoid 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
solenoid valve.
Removal and Replacement:
1. Remove the white and black from the solenoid
valve.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the solenoid
valve.
4. Remove the two #8-32 screws securing the solenoid mounting bracket to the component bracket.
Remove solenoid bracket and solenoid valve as an
assembly.
5. Remove the two #10-32 screws and lockwashers securing the solenoid valve to the solenoid
bracket.
6. Using two #10-32 screws and lockwashers install new solenoid valve on solenoid mounting
bracket.
7. Using two #8-32 screws install solenoid valve and
bracket to the component bracket.
8. Securely fasten the water lines to and from the
solenoid valve.
9. Refer to Fig. 9 when reconnecting the wires.
WHI from Timer
5. Check for resistance across the solenoid valve coil
terminals.
If resistance is present as described, reconnect the
white and black wire from the timer.
If resistance is not present as described, replace the
solenoid valve.
Page 14
BLKfromTimer
FIG. 14-2 SOLENOID VALVE TERMINALS
41711.1 052009
SERVICE (cont.)
SOLENOID VALVES
Disassembly:
1. Use of the basin wrench 01060.0000 is recom-
mended for disassembly of early style valves as
illustrated below.
2. Disconnect from power source and turn off the
water supply to the brewer.
3. Disconnect the water lines to and from the solenoid
valve.
4. Remove the two #8-32 screws securing the sole-
noid mounting bracket to the component bracket.
Remove solenoid bracket and solenoid valve as an
assembly.
5. Remove the two #10-32 screws and lock wash-
ers securing the solenoid valve to the solenoid
bracket.
6. Disassemble the valve according to the illustrations
that correspond to the particular valve you have.
7. On early style valves, leave the fittings installed
in the base to use as leverage. DO NOT CLAMP
THE BASE WITH LOCKING PLIERS AS THIS CAN
CAUSE DAMAGE!
8. Refer to Illustrated Parts Catalogs for replacement
solenoids and repair/rebuild kits.
120VAC - 334
120VAC - 247
240VAC - 757
FIG. 15-1 FIRST STYLE
Page 15
FIG. 15-2 SECOND STYLE
120VAC-1.18K
240VAC-3.76K
FIG. 15-2 THIRD STYLE
41711.1 052009
SERVICE (cont.)
FILL BASIN
FIG.16-1TANKHEATER
TANK HEATER
FIG.16-2TANKHEATER
Disassembly:
1. Use of the basin wrench 01060.0000 is recommended for removal of the fill basin.
2. Disconnect from power source and turn off the
water supply to the brewer.
3. Remove top cover.
4. Use the basin wrench (as shown above) turning
counterclockwise to remove inlet fitting.
5. Lift basin off of the tank inlet.
6. Use new inlet gasket when reinstalling.
Location:
The tank heater is located inside the tank and
secured to the tank lid.
Test Procedures:
1. Disconnect the brewer from the power supply.
2. Check the voltage across the black and white wires
on 120 volt models or the black and red wires for
120/240 volt models, 200 volt models and 240
volt models with a voltmeter. Connect the brewer
to the power source. The indication must be:
a) 120 volts ac for two wire 120 volt 20 amp
models .
b) 240 volts ac for three wire 120/240 volt mod-
els.
c) 200 to 240 volts ac for two wire 200 or 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.
Page 16
4. Disconnect the wires from the tank heater terminals.
5. Check resistance value across tank heater terminals
and compare to chart.
41711.1 052009
SERVICE (cont.)
HEATER RESISTANCE
1800W-120V 7.40 - 8.70
1850W-220V 24.40 -28.40
3500W-200V 10.70 -12.36
3500W-240V 15.36 -17.90
TERMINAL TO SHEATH - INFINITE (OPEN)
FIG.17-1TANKHEATERRESISTANCE
If resistance is present as described, reconnect the
wires, the tank heater is ok.
If resistance is not present as described, replace the
tank heater.
NOTE- If any resistance is read between sheath and
either terminal, remove and inspect heater for cracks
in the sheath.
TANK HEATER (Cont.)
11. Install tank lid with limit thermostat, sprayhead
tube, tank heater, coil assembly (brewers with
faucet) and control thermostat with bracket (early
brewers only) using eight #8-32 hex nut.
12. Reconnect the inlet and outlet water lines to the
faucet coil assembly.
13. Secure sprayhead tube to hood using a hex nut.
14. Install sprayhead.
15. Reconnect the wires to the limit thermostat, tank
heater and control thermostat. See limit thermostat
and control thermostat sections in this manual
when reconnecting wires.
16. Install fill basin, secure with tank inlet fitting and
gasket. Insert water supply line through grommet
in fill basin.
17. Refer to Fig.13 when reconnecting the tank heater
wires.
Removal and Replacement:
1. Disconnect the water supply tube from the fill
basin.
2. Remove the tank inlet fitting securing the fill basin
to the tank lid, remove fill basin and tank inlet
gasket. Set all three parts aside for reassembly.
3. On brewers with faucet, shut-off water supply
to the brewer and disconnect the inlet and outlet
water lines to the faucet coil assembly.
4. Disconnect the black wire on the limit thermostat
from the tank heater switch. On late model brewers also disconnect the blue wire from the limit
thermostat to the control thermostat.
5. Disconnect the black wire and the white or red
wire from the tank heater terminals.
6. Remove sprayhead and the hex nut securing the
sprayhead tube to the hood. Set aside for reassembly.
7. Remove the eight #8-32 nuts securing the tank lid
to the tank.
8. Remove the tank lid with limit thermostat, sprayhead tube, tank heater, coil assembly and control
thermostat w/bracket (early models only).
9 Remove the two hex nuts securing the tank heater
to the tank lid. Remove tank heater with gaskets
and discard.
10. Install new tank heater with gaskets on the tank
lid and secure with two hex nuts.
Page 17
WHI to Terminal Block
(White Insert on 230V
Two Wire Models)
RED to Terminal Block
(Red Insert on 120/240V
Three Wire Models or
200V and 240V Two
Wire Models
FIG.17-2TANKHEATERTERMINALS
BLK to Control Ther-
mostat (Brewers W/
Out Faucet)
ThermalCut-OfftoBLK
from Control Thermostat (Brewers W/
Faucet)
41711.1 052009
SERVICE (cont.)
TANK HEATER SWITCH
FIG18-1TANKHEATERSWITCH
Location:
The tank heater switch is located on the rear of
the brewer on the upper left side of the trunk.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Disconnect the black wire from the limit thermostat.
3. With the tank heater switch in the "ON" position
and with a voltmeter, check the voltage between
the black wire removed from the limit thermostat
and the white wire or red wire on the tank heater.
Connect the brewer to the power source. The
indication must be:
a) 120 volts ac on two wire 120 volt models.
b) 240 volts ac on three wire 120/240 volt mod-
els.
c) 200 to 240 volts ac on 200 volt or 240 volt
models.
4. Disconnect the brewer from the power source.
If voltage is not present as described, proceed to
#5.
If voltage is present as described, the switch is working properly.
5. With the tank heater switch in the "ON" upper position, check for continuity between the black wire
removed from the limit thermostat and the black
insert on the terminal block. Continuity should
not be present in the "OFF" lower position.
If continuity is present as described, the tank heater
switch is operating properly.
If continuity is not present as described, replace the
tank heater switch.
Removal and Replacement:
1. Shut off and disconnect the incoming water supply
to the brewer.
2. On automatic brewers gently remove the fill tube
from back of fill basin.
3. Remove the tank inlet fitting securing fill basin the
tank lid. Remove fill basin and gasket. Set all three
parts aside for reassembly.
4. On brewers with faucets, disconnect the water
supply to coil assembly and remove the tube from
the tank to the faucet.
5. Remove sprayhead and hex nut securing sprayhead
tube to the hood. Set aside for reassembly.
6. Disconnect the wires on the limit thermostat and
the tank heater and the control thermostat (early
models).
7. Gently pull the thermostat sensor and grommet
from the tank lid.
8. Insert a tube to the bottom of the tank and syphon
ALL of the water out.
9. Remove the two #8-32 screws securing the tank
assembly to the hood.
10. Lift tank and components out as an assembly and
set aside for reassembly.
11. Disconnect the two black wires from the tank heater
switch.
12. Remove the plastic facenut, hex facenut and the
switch indicator/guard bracket that secures tank
heater switch to the rear of the brewer. Remove
switch and discard.
13. Insert new tank heater switch through the hole in
the upper left rear of the trunk and secure with
switch indicator/guard bracket, hex facenut and
plastic facenut.
14. Reconnect the two black wires to the tank heater
switch terminals.
Page 18
41711.1 052009
SERVICE (cont.)
TANK HEATER SWITCH (cont.)
15. Set tank assembly inside the hood on mounting
brackets and secure with two #8-32 screws.
16. Reconnect the wires to the limit thermostat, tank
heater and the control thermostat. Refer to limit
thermostat, tank heater and control thermostat sections in this manual when reconnecting wires.
17. Brewers with faucet reinstall the faucet tube and
reconnect the water supply tube to the coil assembly.
18. Secure the sprayhead tube to the hood using hex
nut.
19. Install sprayhead.
20. Install fill basin, inlet gasket and secure to tank lid
with tank inlet fitting.
21. Carefully install water fill tube into the back of
the fill basin.
22. Reconnect and turn on the incoming water supply.
23. Refer to Fig. 15 when reconnecting the wires.
BLKtoLimitThermostat
BLKtoTerminalBlock
(Black Insert)
FIG.19-1TANKHEATERSWITCHTERMINALS
Page 19
41711.1 052009
SERVICE (cont.)
THERMAL CUT-OFF (Brewers W/Faucet)
Fig. 20-1 THERMAL CUT-OFF
Location:
The thermal cut-off (TCO) is a thermal fuse located
above the tank lid, connected to the tank heater.
NOTE: Installed only on tanks with coil faucet.
CE models have an additional TCO connected to the
other heater terminal.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect both ends of the TCO.
3. Check for continuity across TCO with an ohmmeter.
Removal and Replacement:
1. Disconnect both ends of the TCO.
2. Install new thermal cut-off.
3. Refer to Fig. 17 when reconnecting wires.
Thermal Cut-Off from Tank
Heater to BLK Lead from
Control Thermostat
WHI or RED to
Terminal Block
120V, 120/240V
FIG. 20-3 TCO TERMINALS
RED to
Heater Switch
Thermal Cut-Off from Tank
Heater to BLK Lead from
Control Thermostat
If continuity is present as described, the TCO is operating properly.
If continuity is not present as described, replace the
TCO.
FIG. 20-2 TESTING TCO
Page 20
230V CE
FIG. 20-4 TCO TERMINALS
41711.1 052009
SERVICE (cont.)
COIL/FAUCET
Location:
The coil for the faucet is located in the tank.
Operation:
Water inside the coil is separate from the brewing water
and is always under line pressure. Brewing water in
the tank heats the submerged coil. Use of a coil faucet
during a brew cycle will not cause short potting, but is
limited to 8-10 ounces of hot water before the cooler
water is passed through coil.
Removal and Replacement:
1. Disconnect the brewer from the power and water
sources.
2. Turn and remove aerator assembly from bottom of
faucet. Clean parts of any mineral buildup. Install
new gasket when reassembling.
3. Remove the bonnet nut and remove handle as-
sembly.
4. Remove the seat cup. Clean inside the faucet body
and install new seat cup.
Fig. 21-1 COIL/FAUCET
FAUCET BODY
AERATOR
Page 21
BONNET NUT
SEAT CUP
41711.1 052009
SERVICE (cont.)
LIMIT THERMOSTAT
If continuity is present as described, the limit thermostat
is operating properly.
If continuity is not present as described, replace the
limit thermostat.
Removal and Replacement:
1. Remove all 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 the Fig. 5 when reconnecting the wires.
FIG. 22-1 LIMIT THERMOSTAT
Location:
The limit thermostat is located inside the rear of
the hood on the tank lid.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the blue and black wires from the limit
thermostat.
3. Check for continuity across the limit thermostat
terminals with a ohmmeter.
to Tank
Heater Switch
Lead from
Control Thermostat
FIG. 22-2 LIMIT THERMOSTAT TERMINALS
Page 22
41711.1 052009
RECOVERY BOOSTER RELAY (OPTIONAL)
FIG. 23-1 RECOVERY BOOSTER RELAY
Location
The recovery booster(s) are located inside the trunk
on the center of the component brackets just above
the solenoid valve. The coil is activated by the timer/
solenoid circuit. The contacts then close, bypassing
the mechanical thermostat, thereby allowing faster
heating of the incoming water in the tank.
Test Procedures
1. Disconnect the brewer from the power source.
2. Disconnect the white and black wires from the coil
of the recovery booster relay.
3. With a voltmeter, check the voltage across the
white and the black wires. Connect the brewer
to the power source and initate a brew cycle. The
indication must be 120 volts ac.
4. Disconnect the brewer from the power source.
contact terminals. Connect the brewer to the power
source. With the "ON/OFF" switch in the "ON" position and the start switch pressed and released,
check for continuity across relay terminals.
7. Disconnect the brewer from the power source.
If continuity is present as described, reconnect the blue
and black wires to the relay contact terminals.
If continuity is not present as described replace the
relay.
Removal and Replacement:
1. Remove all wires from the relay.
2. Remove the two #8-32 screws securing the relay
mounting bracket to the component bracket. Remove relay bracket and relay as an assembly.
3. Remove the screw securing the relay to the relay
mounting bracket.
4. Install new relay to the component bracket.
5. Refer to Fig. 9 when reconnecting the wires.
B = COIL to TIMER
6-9 = N.O. spare
A = COIL to TIMER
A
B
9
6
4-7 = N.O. to THERMOSTAT
7
4
EARLY MODELS
LATER MODELS
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to Wiring
Diagrams and check the brewer wiring harness.
5. Check the resistance across the coil's terminals.
If resistance is present as described in FIG 9, reconnect
the white and black wires to the coil.
If resistance is not present as described, replace the
relay.
6. Disconnect the blue and black wires from the relay
Page 23
1 = COIL to TIMER
8
1
0
6
6-8 = N.O. not used
4
2
2-4 = N.O. to THERMOSTAT
0 = COIL to TIMER
FIG. 23-2 BOOSTER RELAY TERMINALS
41711.1 052009
SERVICE (cont.)
TIMER (Early Models)
To Main Wiring Harness
To Solenoid Valve
EARLY STYLE
FIG. 24-1 TIMER TERMINALS
Location:
The timer is located inside the front of the trunk
on the upper right side of component bracket.
Test Procedure.
1. Disconnect the brewer from the power source.
2. Disconnect the polarized, three pin connector from
the brewer wiring harness.
3. With a voltmeter, check the voltage across sockets
P2 & P3 (white and white/red wires) of the female
connector when the "ON/OFF" switch is in the "ON"
position (upper). Connect the brewer to the power
source. The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac on two wire 200 volt or 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 the
Wiring Diagrams and check the brewer wiring harness.
5. Check the voltage across the sockets P1 & P2
(blue and white wires) of the female connector
with a voltmeter when the "ON/OFF" switch is in the
"ON" position (upper) and start switch pressed.
Page 24
Connect the brewer to the power source. The
indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac for two wire 200 volt or 240
volt models.
6. Disconnect the brewer from the power source.
7. Reconnect the three pin connector from main
wiring harness to the timer.
If voltage is present as described, proceed to #8
If voltage is not present as described, refer to Wiring
Diagrams and check the start switch and brewer wiring harness.
8. With a voltmeter, check the voltage across the
black and white wires when the "ON/OFF" switch
is in the "ON" position (upper) and the "START"
switch is pressed to the "START" position and
released. Connect the brewer to the power source.
The indication must be:
a) 120 volts ac for approximately 20 seconds for
two wire 120 volt models and three wire 120/240
volt models.
b) 200 to 240 volts ac for approximately 20 seconds
for two wire 200 volt or 240 volt models.
If voltage is present as described, the brew timer is
operating properly. Reconnect the polarized, three
pin connector.
If voltage is not present as described, replace the
timer.
Removal and Replacement:
1. Separate all connectors between the brewer wiring
harness and the timer.
2. Remove the one #8-32 screw securing timer to
component bracket.
3 Install new timer circuit board as described in Late
Model Timer section on the following pages.
4. Refer to Fig. 21 when reconnecting the wires.
5. Install the Timer Setting decal provided with the
replacement timer kit, below the schematic on the
inside of the front access panel.
6. Adjust the timer as required. Refer to Late Model
Timer section on the following pages.
41711.1 052009
SERVICE (cont.)
FRESHNESS TIMER (Early Models)
FIG. 25-1 TIMER TERMINALS
Location:
The freshness timer is located inside the front of
the trunk on the component bracket.
Operation:
The freshness timer activates an LED on the
control panel after a predetermined amount of time
(after the brew cycle) to indicate carafe on warmer
too long.
Settings: Default settings underlined
JP1: Choose between flashing LED or steady.
JP2: Choose whether the LED stays ON, then
turns off; or is off, then turns on at the end of delay.
R4: Delay time adjustment, 20-60 minutes.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the
Wiring Diagrams and check the brewer wiring harness.
4. Check the voltage across the T3 and T4 (white/
orange and white/blue wires) of the fresh timer
with a voltmeter when the "ON/OFF" switch is in
the "ON" position (upper) and start switch pressed.
Connect the brewer to the power source. The
indication must be: (when solenoid is activated)
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac for two wire 200 volt or 240
volt models.
5. Disconnect the brewer from the power source.
6. Reconnect the three pin connector from main
wiring harness to the timer.
If voltage is present as described, proceed to #7
If voltage is not present as described, refer to Wiring
Diagrams and check the start switch and brewer wiring harness.
7. With a voltmeter, check the voltage across connec-
tor P1 after the delay period (JP1 set to "STEADY",
and JP2 set to "ON"). The indication must be:
3-5 volts dc (when solenoid is activated).
If voltage is present as described, the fresh timer
is operating properly. If voltage is not present as
described, replace the timer. NOTE: The freshness
timer is no longer available.
Removal and Replacement:
1. Disconnect the brewer from the power source.
Test Procedure.
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across T1 & T2
(black & white wires) of the fresh timer. Connect
the brewer to the power source. The indication
must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac on two wire 200 volt or 240
volt models.
3. Disconnect the brewer from the power source.
Page 25
2. Disconnect all four connectors from the timer.
2. Remove the two #8-32 screws securing timer to
component bracket.
6. Adjust the timer as required. Refer to Late Model
Timer section on the following pages.
41711.1 052009
SERVICE (cont.)
DIGITAL BREW TIMER (Late Models)
FIG. 26-1 DIGITAL BREW TIMER
Location:
The timer is located inside the front of the trunk
on the upper right side of component bracket.
4. With a voltmeter, check the output voltage across
terminals TL2 and TL4 when the "ON/OFF" switch
is in the "ON" position. Connect the brewer to the
power source and press the "START" switch. The
indication must be as follows:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac for two wire 200 volt or 240
volt models.
If voltage is present as described, the timer is operating properly. Reset the timer as required, to obtain the
desired brew volume.
If voltage is not present as described, proceed to
#6.
6. With a voltmeter, check the input start voltage
across terminals TL2 and TL5 when the "ON/OFF"
switch is in the "ON" position. Connect the brewer
to the power source and press the "START" switch.
The indication must be as follows:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac on two wire 200 volt or
240 volt models.
Test Procedure
NOTE: Do not remove or install wires while timer board
is installed. Pressure applied to one side may cause
damage to the board.
1. Disconnect the brewer from the power source and
remove the front access panel.
2. With a voltmeter, check the supply voltage across
terminals TL1 and TL2 when the "ON/OFF" switch
is in the "ON" position. Connect the brewer to the
power source. The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac on two wire 200 volt or
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 Wir-
ing Diagrams and check the wiring harness.
If voltage is not present as described, refer to the
Wiring Diagrams and check the wiring harness to the
start switch.
If voltage is present as described, disconnect the brewer
from the power source and replace the timer.
Removal and Replacement:
1. Remove the two #8-32 screws securing circuit
board to the mounting bracket.
2. Remove circuit board and spacers (as required).
3. Remove all wires from the timer.
4. Attach all wires to the replacement timer board
prior to installation to the component mounting
bracket. Refer to FIG. 21 when reconnecting the
wires.
5. Install new circuit board with spacers (as required)
to the component mounting bracket.
6. Adjust the timer as described in the next section.
Page 26
41711.1 052009
SERVICE (cont.)
DIGITAL BREW TIMER (Late Models)(cont.)
Timer Setting:
NOTE: Prior to setting or modifying volumes, check
that the brewer is connected to water supply, the
tank is properly filled, and a funnel and server are in
place.
NOTE: All volume settings must be done with the
sprayhead installed.
1. Modifying brew volumes. To modify a brew vol-
ume,rstcheckthattheSET/LOCKswitchisinthe
“SET” position on the circuit board.
To increase a brew volume, place the ON/OFF
switch in the “ON” position, press and hold the START
switch until three clicks are heard. Release the switch
and press it again one or more times. (Failure to release the switch within two seconds after the third click
causes the volume setting to be aborted and previous
volume setting will remain in memory) Each time the
switch is pressed, two seconds are added to the brew
time period. Allow the brew cycle to finish in order to
verify that the desired volume has been achieved.
NOTE: Several ounces of water will continue to syphon from the tank after turning the switch “OFF”.
The brewer remembers this volume and will continue
to brew batches of this size until the volume setting
procedure is repeated.
NOTE: When brewing coffee, volume will decrease
due to absorption by the coffee grounds.
3. Setting programming disable feature. If it becomes necessary to prevent anyone from changing
brew time once programmed, you can set the SET/
LOCKswitchtothe“LOCK”position.Thiswillprevent
any further programming until switch is once again
put into the “SET” position.
To decrease a brew volume, place the ON/OFF
switch in the “ON” position, press and release the
START switch once for every two-second interval to
be removed from the total brew time period; then immediately press and hold down the START switch until
three clicks are heard. Release the switch. (Failure to
release the switch within two seconds after the third
click causes the volume setting to be aborted and
previous volume setting will remain in memory). Allow the brew cycle to finish in order to verify that the
desired volume has been achieved.
2. Setting brew volumes. To set a brew volume,
rstcheckthattheSET/LOCKswitchisinthe“SET”
position on the circuit board. Place the ON/OFF switch
in the “ON” position, press and hold the START switch
until three distinct clicks are heard and then release
the switch. (Failure to release the switch within two
seconds after the third click causes the volume setting
to be aborted and previous volume setting will remain
in memory.
View the level of the liquid being dispensed. When
the desired level is reached, turn the ON/OFF switch
to “OFF”.
Page 27
BLU wire to TL5 from start switch
WHI/GRN wire to TL4 from solenoid
WHI/BLU wire to TL3 from solenoid
WHI wire to TL2 from N/L2
WHI/RED wire to TL1 from on/off switch
FIG. 27-1 DIGITAL TIMER WIRING
41711.1 052009
SERVICE (cont.)
WARMER ELEMENT(S)
FIG. 28-1 WARMER ELEMENTS
Location:
The warmer element(s) is located under the warmer
plate.
Test Procedures:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check voltage across the two
wires at the warmer element 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 120/208 and 120/240 volt models, or 230
volts ac for two wire 230 volt models.
3. Disconnect the brewer from the power source.
4. Check the resistance across the two terminals on
the warmer element. NOTE: There should be no
resistance reading between the heater sheath and
either terminal. Refer to the following chart.
If resistance is to specification, reconnect the two
wires to the warmer element.
If resistance is not to specification, 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.
WHI/RED to ON/OFF Switch (Center Warmer)
YEL to ON/OFF Switch (Left Front Warmer)
WHI/VIO to ON/OFF Switch (Left Rear Warmer)
BRN/BLk to ON/OFF Switch (Right Front Warmer)
VIO to ON/OFF Switch (Right Rear Warmer)
WHI to Terminal Block (120V or
120/240V Brewers)
RED to Terminal Block (200V or
240V Brewers
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to Wiring
Diagrams and check wiring harness.
WARMER RESISTANCE
100W-120V 132 - 152
100W-220V 450 - 532
100W-200V 372 - 432
TERMINAL TO SHEATH - INFINITE (OPEN)
FIG. 28-2 WARMER ELEMENTS
Page 28
FIG. 28-3 WARMER ELEMENT TERMINALS
41711.1 052009
L1
BLK
WHI
BLK
BLK
BLK
BLK
BLK VIO
BRN/BLK
YEL
WHI/VIO
LEFT FRONT
WARMER
LEFT REAR
WARMER
RIGHT FRONT
WARMER
RIGHT REAR
WARMER
BLK BLK
TANK HEATER
WHI (MODEL 20)
NL2
RED (MODEL 35)
GREEN
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI/GRN
WHI/BLU
LOWER CENTER WARMER
BLUWHI/RED
WHI/RED
WHI/RED
START SWITCH
SOL
T2
T4
T3T5T1
BREW
TIMER
BLU
LIMIT
THERMOSTAT
ON/OFF SWITCH
"KEEP WARM" HEATER
(FAUCET OPTION
ONLY)
THERMAL
CUT-OFF
HEATER
SWITCH
SWITCH AND
THERMOSTAT
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
10476.0000G 07/03 © 1990 BUNN-O-MATIC CORPORATION
120/240 VOLTS AC 3 WIRE
120 VOLTS AC 2 WIRE
SINGLE PHASE
SCHEMATIC WIRING DIAGRAM
CRT5, & CRTF5
Page 29
41711.1 052009
L1
BLK
BLK
BLK
BLK
BLK
BLK
BRN/BLK
YEL
VIO
WHI/VIO
WHI/RED
WHI/RED
WHI/RED
WHI/BLU
RED
RED
RED
RED
RED
RED
RED
WHI/GRN
BREW
TIMER
T1 T5 T3
T4
T2
BLU
START SWITCH
WHI
BLK BLK
GRN/YEL
RED
L2
WHI
RED
RED
SOL
TANK HEATER
(MODEL CRTF5A ONLY)
THERMAL
CUT-OFF
BLU
HEATER
SWITCH
LIMIT
THERMOSTAT
"KEEP WARM" HEATER
LOWER CENTER WARMER
LEFT FRONT
WARMER
LEFT REAR
WARMER
RIGHT FRONT
WARMER
RIGHT REAR
WARMER
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
SWITCH AND
THERMOSTAT
10477.0000H 07/03 © 1990 BUNN-O-MATIC CORPORATION
240 VOLTS AC 2 WIRE
SINGLE PHASE
SCHEMATIC WIRING DIAGRAM
CRT5A, & CRTF5A
Page 30
41711.1 052009
L1
BLK
BLK WHI/RED
WHI/RED
WHI/RED
BLK
YEL
WHI/VIO
BRN/BLK
VIO
BLK
BLK
BLK
LOWER CENTER WARMER
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
BLK BLK
GREEN
TANK HEATER
WHI
L2
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
SOL
BLU
START SWITCH
T1 T5 T3
T4
T2
WHI/BLU
BREW
TIMER
LEFT FRONT
WARMER
LEFT REAR
WARMER
RIGHT FRONT
WARMER
RIGHT REAR
WARMER
WHI/GRN
(MODEL CRTF5B ONLY)
THERMAL
CUT-OFF
BLU
HEATER
SWITCH
LIMIT
THERMOSTAT
SWITCH AND
THERMOSTAT
10477.0001H 07/03 © 1993 BUNN-O-MATIC CORPORATION
200 VOLTS AC 2 WIRE
SINGLE PHASE
SCHEMATIC WIRING DIAGRAM
CRT5B, & CRTF5B
Page 31
41711.1 052009
SCHEMATIC WIRING DIAGRAM
CW/CWT/CWTF - APS/TS/TSR/TC
GREEN
MAIN ON/OFF SWITCH
(Late 20 & 35
Models only)
L1
BLK
N
L2
WHI Model 20
RED Model 35
WHI Model 15 & 35
BLK-14
HEATER
SWITCH
BLK BLK BLK
OPTIONAL AUTOMATIC BREW CIRCUIT
BLK
LIMIT
THERMOSTAT
WHI
ON/OFF
SWITCH
WHI/RED
READY INDICATOR
BLKBLU
SW. & THERMOSTAT
"KEEP WARM" HEATER
START SWITCH
WHI/RED
(FAUCET OPTION ONLY)
THERMAL
FUSE
TANK HEATER
BLKBLK
BLU
WHI/BLU
T5
T1T2T3
BREW
TIMER
BLK Model 15
BLK Model 20 & 35
SOL
WHI/GRN
T4
WHI-14 Model 20
RED-14 Model 35
WHI Model 15
WHI Model 20
WHI
WHI
WHI
120/240 VOLTS AC 3 WIRE
120 VOLTS AC 2 WIRE
SINGLE PHASE
10693.0000G 02/07 © 1993 BUNN-O-MATIC CORPORATION
Page 32
41711.1 052009
L1
SCHEMATIC WIRING DIAGRAM CW-TS & CW-APS ERT
THERMOSTAT
BLK
BLK
HEATER
SWITCH
THERMOSTAT
BLK
WHI
LIMIT
E.R.T
ASSY.
BLU
BLU
READY INDICATOR
BLU BLK
SWITCH
TAN
TAN
(FAUCET OPTION ONLY)
THERMAL FUSE
BLK
TANK HEATER
AUXILIARY OUTLET
GRN
RED (3-WIRE MODELS)
WHI (2-WIRE MODELS)
50W
"KEEP WARM" HEATER
WHI
WHI
WHI
N
L2
OPTIONAL AUTOMATIC BREW CIRCUIT
ON/OFF
SWITCH
BLK
WHI/RED
120/240 VOLTS AC 3 WIRE
120 VOLTS AC 2 WIRE
SINGLE PHASE
(200 WATT MAXIMUM)
START SWITCH
P3
P1
BLK
BREW
TIMER
SOL
WHIBLK
BLU BLU
WHI/RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
10693.0001C 9/96 © 1996 BUNN-O-MATIC CORPORATION
WHI
P2
WHI
WHI
Page 33
41711.1 052009
SCHEMATIC WIRING DIAGRAM FOR CWT-APS MV,
CWTF-APS MV, CWTF-TS MV, CWTF-TSR MV
Page 34
41711.1 052009
Page 35
41711.1 052009
Page 36
41711.1 052009
Page 37
41711.1 052009
BLK
Page 38
41711.1 052009
Page 39
41711.1 052009
SCHEMATIC WIRING DIAGRAM
CWT/CWTF TWIN 0/2, 2/2, 4/2 & CWT TWIN-APS
GRN
L1
BLK
L2
RED
N
WHI
SW1
LT.LIMIT
THERMOSTAT
WHI WHI
SW2
RT. LIMIT
THERMOSTAT
WHI
SW3
WHI/RED
SW4
BLK
P1-2
WHI/GRN
P1-3
SW6
WHI/GRN
BLK
MODELS 2/2 & 4/2 ONLY
(NOT AVAILABLE ON CWT TWIN-APS)
SW7
LT. READY INDICATOR
RED
LT. SW. & THERMOSTAT
BLU
RT. READY INDICATOR
RED
RT. SW. & THERMOSTAT
BLU
WHI/RED
WHI/GRN
BLU
T1 T5 T3
BLK
BLK
LEFT LOWER WARMER
RIGHT LOWER WARMER
WHI/RED
WHI/RED
WHI/BLU
WHI/GRN
T4
T2
RIGHT
BREW TIMER
(FAUCET)
THERMAL
SAFETY FUSE
BLK
LEFT "KEEP WARM" HEATER
BLK BLK
BLK
RIGHT "KEEP WARM" HEATER
WHI
WHIRED
WHI
SW5
BLU
T1 T5 T3
RT
SOL
BREW TIMER
MAIN ON/OFF SWITCH
(Late Models only)
LEFT TANK HEATER
RIGHT TANK HEATER
P1-1
WHI/BLU
WHI/GRN
T4
T2
LEFT
BLK
REDBLUBLKBLK
REDBLUBLKBLK
WHI
RED
WHI
WHI
WHI
LT
SOL
WHI
WHI
RED
WHI
P4-2
P4-3
RIGHT TOP FRONT WARMER
P5-3
LEFT TOP REAR WARMER
P5-2
RIGHT TOP REAR WARMER
SW8
BLK
MODEL 4/2 ONLY
SW9
RED
SW10
BLK
YEL YEL
WHI/YEL WHI/YEL
WHI/VIO WHI/VIO
WHI/BRN WHI/BRN
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
10736.0000L 03/07 © 1993 BUNN-O-MATIC CORPORATION
LEFT TOP FRONT
WARMER
WHI WHIRED
WHI
WHI WHI
WHI
Page 40
P4-1
P5-1
WHI
WHI
RED
WHI
WHI
WHI
41711.1 052009
SCHEMATIC WIRING DIAGRAM
CWT/CWTF TWIN 0/2, 2/2, 4/2 & CWT TWIN-APS
GRN
L1
BLK
L2
RED
N
WHI
SW1
SW2
Models after 2/210
SW3
WHI/RED
SW4
BLK
WHI/GRN
MODELS 2/2 & 4/2 ONLY
(NOT AVAILABLE ON CWT TWIN-APS)
SW7
LT.LIMIT
THERMOSTAT
LT. READY INDICATOR
RED
LT. SW. & THERMOSTAT
BLU
BLK
(FAUCET)
THERMAL
SAFETY FUSE
BLK
MAIN ON/OFF SWITCH
(Late Models only)
LEFT TANK HEATER
BLK
REDBLUBLKBLK
WHI WHI
LEFT "KEEP WARM" HEATER
BLK BLK
BLK
RIGHT TANK HEATER
REDBLUBLKBLK
RT. LIMIT
THERMOSTAT
RT. READY INDICATOR
RED
RT. SW. & THERMOSTAT
BLU
BLK
WHI
RIGHT "KEEP WARM" HEATER
WHI/GRN
P1-2
P1-3
BLK
SW6
WHI/RED
WHI/GRN
BLU
LEFT LOWER WARMER
RIGHT LOWER WARMER
WHI/RED
WHI/RED
WHI/BLU
T1 T5 T3
BREW TIMER
RIGHT
T4
T2
SW5
RT
SOL
WHI/GRN
WHI
WHI
BLU
WHIBLK
T1 T5 T3
LEFT
BREW TIMER
P1-1
WHI/BLU
WHI/GRN
T4
T2
LT
SOL
RED
WHI
WHI
WHI
WHI
WHI
WHI
WHI
P4-2
P4-3
P5-3
P5-2
SW8
BLK
MODEL 4/2 ONLY
SW9
RED
SW10
BLK
YEL YEL
WHI/YEL WHI/YEL
WHI/VIO WHI/VIO
WHI/BRN WHI/BRN
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
10736.0000M 01/10 © 1993 BUNN-O-MATIC CORPORATION
WHI WHIRED
LEFT TOP FRONT
WARMER
WHI
RIGHT TOP FRONT WARMER
WHI WHI
LEFT TOP REAR WARMER
WHI
RIGHT TOP REAR WARMER
Page 41
P4-1
P5-1
WHI
WHI
RED
WHI
WHI
WHI
41711.1 020410
SCHEMATIC WIRING DIAGRAM CWTFA
L1
TWIN 2/2 & 4/2
LT. READY INDICATOR
BLK
BLK
RIGHT TANK HEATER
BLK
LEFT TANK HEATER
WHI WHI
(FAUCET)
THERMAL
SAFETY FUSE
BLK
LEFT "KEEP WARM" HEATER
BLK BLU
LT. SW. & THERMOSTAT
BLK
RT. READY INDICATOR
RT. SW. & THERMOSTAT
BLK
WHI WHI
RIGHT "KEEP WARM" HEATER
P1-2
WHI/RED
LEFT LOWER WARMER
P1-3
WHI/GRN
RIGHT LOWER WARMER
RED RED
RED
BLK
BLK
SW3
WHI/RED
SW4
WHI/GRN
WHI/RED
WHI/RED
WHI/BLU
T4
T2
SOL
WHI/GRN
WHI
SW7
WHI/GRN
WHI/GRN
SW6
P3-1
BLU BLU/BLK
P3-3
BLK
T1 T5 T3
RIGHT
BREW TIMER
RT
SW5
RED
REDBLK
P1-1
BLU BLU/BLK
P2-3
P3-2
BLU
BLU
BLU
BLU
P2-1
BLK
THERMOSTAT
THERMOSTAT
T1 T5 T3
BREW TIMER
LT. LIMIT
RT. LIMIT
WHI/BLU
LEFT
BLU
BLU
WHI/GRN
T4
T2
WHI
GRN/YEL
SW1
SW2
LT
SOL
P2-2
L2 L3
BLU
RED
RED
RED
RED
RED
RED
RED
RED
P4-2
P4-3
RIGHT TOP FRONT WARMER
P5-3
LEFT TOP REAR WARMER
P5-2
RIGHT TOP REAR WARMER
SW8
BLK
MODEL 4/2 ONLY
SW9
BLK
SW10
BLK
YEL YEL
WHI/YEL WHI/YEL
WHI/VIO WHI/VIO
WHI/BRN WHI/BRN
230 VOLTS AC 3 WIRE
THREE PHASE
10736.0001G 12/00 © 1993 BUNN-O-MATIC CORPORATION
LEFT TOP FRONT
WARMER
RED REDBLK
RED
RED RED
RED
Page 42
P4-1
P5-1
RED
RED
RED
RED
RED
41711.1 052009
L1
SW1
SCHEMATIC WIRING DIAGRAM
CWTFA & CWTFB TWIN 2/2 & 4/2
LT.LIMIT
THERMOSTAT
LT. READY INDICATOR
LT. SW. & THERMOSTAT
BLU
BLKRED
(FAUCET)
THERMAL
FUSE
BLKBLK
BLK
LEFT TANK HEATER
GRN/YEL
L2
REDBLUBLKBLK
SW2
SW3
THERMOSTAT
BLK WHI/RED
SW4
BLK
WHI/GRN
WHI/GRN
WHI/GRN
SW7
RT. LIMIT
P1-2
P1-3
SW6
BLU
WHI/RED
WHI/GRN
BLU BLU/BLK
P3-3
RT. READY INDICATOR
BLKRED
RT. SW. & THERMOSTAT
LEFT LOWER WARMER
RIGHT LOWER WARMER
WHI/RED
WHI/RED
P3-1
BLK
WHI/BLU
T1 T5 T3
RIGHT
BREW TIMER
WHI/GRN
T4
WHI
T2
RED RED
RED
SW5
RT
SOL
BLK REDBLUBLKBLK
P1-1
P2-1
BLU BLU/BLK
P2-3
BLK
P3-2
RIGHT TANK HEATER
WHI/BLU
T1 T5 T3
LEFT
BREW TIMER
T4
T2
LT
SOL
WHI/GRN
WHI
P2-2
RED
RED
RED
RED
RED
RED
P4-2
YEL YEL
SW8
BLK
MODEL 4/2 ONLY
SW9
BLK
SW10
BLK
WHI/YEL WHI/YEL
WHI/VIO WHI/VIO
WHI/BRN WHI/BRN
P4-3
P5-3
P5-2
200 OR 240 VOLTS AC 2 WIRE
SINGLE PHASE
RED REDBLK
LEFT TOP FRONT WARMER
P4-1
RED
RIGHT TOP FRONT WARMER
RED RED
LEFT TOP REAR WARMER
P5-1
RED
RIGHT TOP REAR WARMER
10736.0002J 12/00 © 1993 BUNN-O-MATIC CORPORATION
Page 43
RED
RED
RED
RED
RED
41711.1 052009
SCHEMATIC WIRING DIAGRAM
CWTFA 2/2 TWIN, CWTFA 4/2 TWIN & CWTFA TWIN-APS
L1 L2
LT. LIMIT
THERMOSTAT
BLK BLK
WHI WHI
LEFT "KEEP WARM" HEATER
BLU
BLK
BLK
BLK
SW1
BLK
RIGHT TANK HEATER
WHI WHI
SW3
NOT APPLICABLE TO APS MODELS
BLK WHI/RED
SW4
BLK
WHI/GRN
WHI/GRN
P1-2
P1-3
SW6
WHI/RED
WHI/GRN
RIGHT LOWER WARMER
BLU BLU/BLK
WHI/GRN
NOT APPLICABLE TO APS MODELS
SW7
LT. READY INDICATOR
LT. SW. & THERMOSTAT
BLU
RT. READY INDICATOR
BLK
RT. SW. & THERMOSTAT
BLK
RIGHT "KEEP WARM" HEATER
LEFT LOWER WARMER
WHI/RED
WHI/RED
P3-1
BLK
T1 T5 T3
BREW TIMER
WHI/BLU
RIGHT
P3-3
BLKBLK
RED RED
RED
SW5
RT
SOL
WHI/GRN
T4
WHI
T2
(FAUCET)
THERMAL
SAFETY FUSE
BLK
BLK
BLU
THERMOSTAT
P1-1
P2-1
BLU BLU/BLK
P2-3
BLK
T1 T5 T3
BREW TIMER
P3-2
RT. LIMIT
WHI/BLU
LEFT
LEFT TANK HEATER
SW2
BLKBLU
LT
SOL
WHI/GRN
T4
WHI
T2
P2-2
RED
RED
RED
RED
RED
RED
RED
RED
RED
GRN/YEL
P4-2
YEL YEL
SW8
BLK
MODEL 4/2 ONLY
SW9
BLK
SW10
BLK
WHI/YEL WHI/YEL
WHI/VIO WHI/VIO
WHI/BRN WHI/BRN
P4-3
P5-3
P5-2
230 VOLTS AC 2 WIRE
SINGLE PHASE
10736.0004A 02/06 © 2006 BUNN-O-MATIC CORPORATION
RED REDBLK
LEFT TOP FRONT WARMER
RED
RIGHT TOP FRONT WARMER
RED RED
LEFT TOP REAR WARMER
RED
RIGHT TOP REAR WARMER
Page 44
P4-1
P5-1
RED
RED
RED
RED
RED
41711.1 052009
SCHEMATIC WIRING DIAGRAM
CWTFA TWIN-APS CE
L1
BLU
SW1
NCNC
WHI WHIBLK
BLU
SW2
NCNC
WHI WHIBLK
SW3
BLK
SW4
BLK
LEFT "KEEP WARM" HEATER
RIGHT "KEEP WARM" HEATER
LT. READY INDICATOR
LT. SW. & THERMOSTAT
LT. READY INDICATOR
LT. SW. & THERMOSTAT
SW5
WHI/REDWHI/RED
WHI/RED
SW6
WHI/REDWHI/RED
WHI/RED
BLKRED
BLKRED
BLU
BLU
BLK
BLK
T1 T5 T3
LEFT
BREW TIMER
BLK
LT. TANK HEATER
BLK
RT. TANK HEATER
WHI/BLU
WHI/GRN
T4
T2
WHI/BLU
GRN/YEL
LT. LIMIT
THERMOSTAT
RED
RT. LIMIT
THERMOSTAT
REDBLUBLK
LT
SOL
RT
SOL
L2
REDBLUBLK
RED
RED
RED
RED
230 VOLTS AC
2 WIRE + GND
SINGLE PHASE
T1 T5 T3
RIGHT
BREW TIMER
T4
T2
WHI/GRN
10736.0005B 08/07 © 2007 BUNN-O-MATIC CORPORATION
Page 45
RED
41711.1 052009
SCHEMATIC WIRING DIAGRAM CWTF TWIN 0/6
L1
N
L2
RED
BLK
BLK
SW3
SW4
SW9
SW1
SW2
THERMOSTAT
WHI
THERMOSTAT
WHI
WHI/RED
WHI/RED
WHI/GRN
WHI/GRN
WHI/GRN
GRY
GRYPIN
WHI
LT.LIMIT
RT. LIMIT
P1-2
P1-3
SW7
SW8
L.E.D.L.E.D.
LT. READY INDICATOR
BLU
LT. SW. & THERMOSTAT
RT. READY INDICATOR
RT. SW. & THERMOSTAT
WHI/RED
LEFT BREW WARMER
WHI/GRN
RIGHT BREW WARMER
BLU BLU/BLK
P3-3
GRY
PIN
PIN
P3-1
BLK
T1 T5 T3
BREW TIMER
BLKRED
WHI/BLU
T4
T2
RIGHT
OPTIONAL
INDICATOR
TIMER
BLK
(FAUCET)
THERMAL
SAFETY FUSE
LEFT "KEEP WARM" HEATER
BLKBLUBLKBLK
RIGHT "KEEP WARM" HEATER
WHI WHI
P1-1
WHI
WHI/RED
WHI/RED
WHI/ORA
RT
SOL
WHI/GRN
WHI
4321
P3-2
BLKBLK
SW5
SW6
LEFT TANK HEATER
RIGHT TANK HEATER
P2-1
BLU BLU/BLK
P2-3
BLK
WHI/BLU
T1 T5 T3
LEFT
BREW TIMER
MAIN ON/OFF SWITCH
(Late Models only)
WHI
WHI
BLK
LT
SOL
WHI/GRN
T4
WHI
T2
GRN
WHI/ORA
P2-2
WHI/ORA
WHI/ORA
WHI
BLK
WHI
WHI
SW11
BLK
REDBLUBLKBLK
RED
RED
RED
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
P5-3
P5-2
BRN/BLK
RIGHT FRONT WARMER
VIO
RIGHT REAR WARMER
BLK
BLK
SW10
BRN/BLK
WHI
VIO
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
10741.0000H 01/07 © 1993 BUNN-O-MATIC CORPORATION
WHI
WHI
P5-1
Page 46
P4-1
WHI
LEFT FRONT WARMER
LEFT REAR WARMER
P4-2
YEL
YEL
WHI
WHI/VIOWHI
P4-3
WHI/VIO
RED
SW12
RED
41711.1 052009
L1
L2
N
SCHEMATIC WIRING DIAGRAM C, CT & CWT
BLK-14
READY INDICATOR
BLKBLU
(FAUCET OPTION ONLY)
HEATER
SWITCH
BLK BLK BLU
ON/OFF
SWITCH
3
2
OPTIONAL FRESH LIGHT SYSTEM (EARLY MODELS)
1
GRY
L.E.D.
PNK
THERMOSTAT
WHI
WHI/RED
LIMIT
INDICATOR
TIMER
SW. & THERMOSTAT
"KEEP WARM" HEATER
4
3
2
1
OPTIONAL DUAL WARMER ASSY (TOP OR SIDE)
2
BLK
2
BLK
OPTIONAL SINGLE TOP WARMER ASSY
120/240 VOLTS AC 3 WIRE
120 VOLTS AC 2 WIRE
BLK
2
SINGLE PHASE
10836.0000H 05/09 ©1995 BUNN-O-MATIC CORPORATION
OPTIONAL AUTOMATIC BREW CIRCUIT
WHI/RED
WHI/RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
THERMAL
START SWITCH
CONNECTOR.
3
1
BRN/BLK
3
1
VIO
3
1
FUSE
BLKBLK
P2
P3
P3
TANK HEATER
BLU
P3
BRN/BLK
VIO
VIO
GREEN
MAIN ON/OFF SWITCH
(Late 20 & 35
Models only)
BLK Model 15
BLK Model 20 & 35
WHI/RED
WHI/BLU
P1
BLU/BLK
BLK
T1 T5 T3
BREW
TIMER
FRONT
REAR
REAR
WHI-14 Model 20
RED-14 Model 35
WHI Model 15
LOWER WARMER
WHI/ORA
L1 N
SOL
WHI/BLU
WHI/GRN
T4
T2
WHI
WHI
BLK
IHWOIV
P2
P1
P1
WHI Model 20
RED Model 35
WHI Model 15 & 35
WHI Model 20
WHI
WHI
WHIBLK
WHI
WHI
WHI
WHI
WHI
WHI
WHI
Page 47
41711.1 052009
SCHEMATIC WIRING DIAGRAM CWTB
L1
HEATER
SWITCH
BLK
ON/OFF SWITCH
2
BLK
3
1
200 VOLTS AC 2 WIRE
THERMOSTAT
WHI/RED
LIMIT
BLU
OPTIONAL DUAL WARMER ASSY (TOP OR SIDE)
2
BLK
2
BLK
OPTIONAL SINGLE TOP WARMER ASSY
2
BLK
SINGLE PHASE
10836.0002E 07/00 ©1995 BUNN-O-MATIC CORPORATION
READY
BLU
SW. & THERMOSTAT
OPTIONAL AUTOMATIC BREW CIRCUIT
START SWITCH
WHI/RED
WHI/RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
3
1
BRN/BLK
3
1
VIO
3
1
VIO RED
BLK
P2
P3
P3
(FAUCET
OPTION ONLY)
THERMAL
FUSE
WHI/RED
P1
BLU
BLU/BLK
P3
BLK
T1 T5 T3
BRN/BLK
VIO
VIO
BLKBLK
BREW
TIMER
FRONT
REAR
REAR
GRN/YEL
TANK HEATER
LOWER WARMER
SOL
WHI/BLU
WHI/GRN
T4
T2
WHI
RED
P2
P1
P1
L2
RED
RED
REDBLK
RED
RED
RED
RED
RED
RED
Page 48
41711.1 052009
SCHEMATIC WIRING DIAGRAM CWTA
L1
BLK
HEATER
SWITCH
BLK
LIMIT
THERMOSTAT
BLU
READY
BLU
SW. & THERMOSTAT
BLK
(FAUCET
OPTION ONLY)
THERMAL
FUSE
BLKBLK
GRN/YEL
TANK HEATER
L2
RED
ON/OFF
SWITCH
2
220-240 VOLTS AC
2 WIRE
SINGLE PHASE
3
1
WHI/RED
WHI
"KEEP WARM"
OPTIONAL AUTOMATIC BREW CIRCUIT
START SWITCH
WHI/RED
WHI/RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
OPTIONAL DUAL WARMER ASSY (TOP OR SIDE)
3
2
BLK
2
BLK
OPTIONAL SINGLE TOP WARMER ASSY
2
BLK
1
BRN/BLK
3
1
VIO
3
1
VIO RED
10836.0003E 07/00 ©1995 BUNN-O-MATIC CORPORATION
P2
P3
P3
P1
BLU
P3
BLK
BRN/BLK
VIO
VIO
WHI/RED
BLU/BLK
T1 T5 T3
BREW
TIMER
WHI/BLU
T4
T2
FRONT
REAR
REAR
LOWER WARMER
SOL
WHI/GRN
WHI
RED
P2
P1
P1
WHI
RED
REDBLK
RED
RED
RED
RED
RED
RED
Page 49
41711.1 052009
SCHEMATIC WIRING DIAGRAM CWTA - CE
L1
HEATER
SWITCH
BLK
RED
BLK
BLK
ON/OFF
SWITCH
OPTIONAL GRINDER INTERFACE
BATCH
SELECTION
SWITCH
THERMOSTAT
BLK
WHI/RED
WHI/RED
READY INDICATOR
BLU
LIMIT
OPTIONAL DUAL WARMER ASSY (TOP OR SIDE)
SW. & THERMOSTAT
BLU
"KEEP WARM" HEATER
WHI
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
BLK
BREW
TIMER
THERMAL
FUSE
WHI/RED
1
RED
2
WHI/ORN
3
WHI/GRN
4
WHI/YEL
5
BLKBLK
GRN/YEL
TANK HEATER
LOWER WARMER
SOL
WHI
RED
L2
THERMAL
FUSE
RED
RED
RED
START
SWITCH
RED
P2
P3
GRY
PNK
4
GRINDER
3
INTERFACE
2
CONNECTOR
1
BLK BRN/BLK
BLK VIO
OPTIONAL SINGLE TOP WARMER ASSY
230 VOLTS AC
2 WIRE
BLK
VIO RED
P3 P1
SINGLE PHASE
10836.0004H 10/02 ©1997 BUNN-O-MATIC CORPORATION
BRN/BLK
VIO
VIO
FRONT WARMER
REAR WARMER
REAR WARMER
RED
P1
RED
RED
RED
RED
Page 50
41711.1 052009
20
AMP
T5 T3 T4
T1
T2
Page 51
41711.1 052009
L1
L2
N
SCHEMATIC WIRING DIAGRAM
CWTF, CWTFB NO WARMER
BLK-14
BLU
HEATER
SWITCH
BLK
ON/OFF
SWITCH
BLK
OPTIONAL FRESH LIGHT SYSTEM
BLK
WHI/RED
GRY
L.E.D.
PNK
BLK
120/240 VOLTS AC 3 WIRE
100-120 VOLTS AC 2 WIRE
SINGLE PHASE
LIMIT
THERMOSTAT
BLU
WHI
INDICATOR
TIMER
READY INDICATOR
SW. & THERMOSTAT
"KEEP WARM" HEATER
4
3
2
1
MAIN ON/OFF SWITCH
BLK Model 15
BLK
(FAUCET OPTION ONLY)
THERMAL
FUSE
TANK HEATER
BLKBLK
WHI/ORA
OPTIONAL AUTOMATIC BREW CIRCUIT
START SWITCH
WHI/RED
WHI/RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
P1
BLU BLU
P3
BLK
GREEN
(Late 20 & 35
Models only)
BLK Model 20 & 35
WHI-14 Model 20
RED-14 Model 35
BLK
BREW
TIMER
BLK
WHI Model 15
SOL
WHI
WHI
WHI Model 20
RED Model 35
WHI Model 20
WHI
WHI
P2
WHI
WHI
WHI Model 15 & 35
10836.0006M 02/07 ©1995 BUNN-O-MATIC CORPORATION
Page 52
41711.1 052009
L1
SCHEMATIC WIRING DIAGRAM
CWTFA NO WARMER
READY INDICATOR
BLU
BLK
GRN
L2
HEATER
SWITCH
BLK
RED
BLK
SWITCH
BLK
OPTIONAL FRESH LIGHT SYSTEM
BLK
BLK
ON/OFF
WHI/RED
GRY
L.E.D.
PNK
LIMIT
THERMOSTAT
230 VOLTS AC
2 WIRE
SINGLE PHASE
BLU
WHI
INDICATOR
TIMER
SW. & THERMOSTAT
"KEEP WARM" HEATER
4
3
2
1
THERMAL
FUSE
OPTIONAL AUTOMATIC BREW CIRCUIT
START SWITCH
WHI/RED
WHI/RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
TANK HEATER
BLKBLK
BLU BLU
P3
WHI/ORA
P1
BLK
WHI
BLK
BREW
TIMER
RED
SOL
WHI
WHI
THERMAL
FUSE
P2
RED
RED
WHI
WHI
10836.0008A 12/99 ©1999 BUNN-O-MATIC CORPORATION
Page 53
41711.1 052009
L1
L2
N
HEATER
SWITCH
BLK BLK
ON/OFF
SWITCH
BLK
SCHEMATIC WIRING DIAGRAM
CT-DV, CTF-DV, CWT-DV & CWTF-DV
READY INDICATOR
BLK
(FAUCET OPTION ONLY)
THERMAL
SAFETY FUSE
BLK-14 BLK-14
OPTIONAL AUTOMATIC BREW CIRCUIT
WHI/RED
WHI/RED
START SWITCH
THERMOSTAT
WHI
WHI/RED
LIMIT
BLU
SW. & THERMOSTAT
BLU
"KEEP WARM" HEATER
TANK HEATER
1320 W
WHI/VIO-14
BLU
GRN
MAIN ON/OFF SWITCH
(Late Models only)
BLK
SELECTOR
SWITCH
BLU-14
TANK HEATER
1800 W
RED-14
LOWER WARMER
WHI/BLU
SOL
BLK
WHI-14
WHI
RED
WHI
WHI
WHIWHI/RED
P1, P2, & P3 ARE PINS OF A
OPTIONAL DUAL WARMER ASSY (TOP OR SIDE)
BLK
BLK
120V AC 2 WIRE
OPTIONAL SINGLE TOP WARMER ASSY
120/208V AC 3 WIRE
120/240V AC 3 WIRE
SINGLE PHASE
10836.0009C 02/07 ©2003 BUNN-O-MATIC CORPORATION
BLK
POLARIZED THREE PIN
CONNECTOR
VIO
VIO
P2
P3
P3
BRN/BLK BRN/BLK
VIO
VIO
T5 T3 T4
T1
BREW
TIMER
FRONT WARMER
REAR WARMER
REAR WARMER
T2
WHI/GRN
P1
P1
WHI
WHI
WHIWHI
WHI
WHI
WHIWHI
Page 54
41711.1 052009
L1
L2
N
HEATER
SWITCH
BLK BLK
ON/OFF
SWITCH
BLK
THERMOSTAT
WHI
WHI/RED
120V AC 2 WIRE
120/208V AC 3 WIRE
120/240V AC 3 WIRE
SINGLE PHASE
SCHEMATIC WIRING DIAGRAM
CWT, CWTF - APS, TS, TC DV
READY INDICATOR
BLK
THERMAL
SAFETY FUSE
(Faucet models only)
BLK-14 BLK-14
"KEEP WARM" HEATER
WHI/RED
WHI/RED
START SWITCH
LIMIT
BLU
SW. & THERMOSTAT
BLU
TANK HEATER
WHI/VIO-14
BLU
GRN
MAIN ON/OFF SWITCH
(Late Models only)
BLK
SELECTOR
SWITCH
BLU-14
TANK HEATER
WHI/BLU
T5 T3 T4
T1
BREW
T2
TIMER
BLK
WHI-14
RED-14
SOL
WHI/GRN
WHI
RED
WHI
WHI
WHI
10836.0010B 02/07 ©2001 BUNN-O-MATIC CORPORATION
Page 55
41711.1 052009
SCHEMATIC WIRING DIAGRAM
L1
BLK
BLK
HEATER
SWITCH
ON/OFF
SWITCH
2
BLK
3
1
HALF/FULL
THERMOSTAT
WHI
WHI/RED
SWITCH
LIMIT
SW. & THERMOSTAT
BLU
SINGLE CW
READY
"KEEP WARM" HEATER
BLK
BLK
2
120/240 VOLTS AC 3 WIRE
120 VOLTS AC 2 WIRE
BLK
2
SINGLE PHASE
10836.0011B 01/03 ©2003 BUNN-O-MATIC CORPORATION
(FAUCET
OPTION ONLY)
THERMAL
FUSE
START SWITCH
WHI/RED
WHI/RED
3
1
BRN/BLK
3
1
VIO
NO CONNECTION THIS APPLICATION
BLKBLK
BLU
PNK
TAN
TANK HEATER
P2
P3
GRN
WHI/RED
T1 T5 T3
BREW
TIMER
WHI (MODELS 15 & 20)
RED (MODEL 35)
LOWER WARMER
SOL
WHI/BLU
WHI/GRN
T4
WHI
T2
P1, P2, &
P3 ARE
PINS OF A
POLARIZED
THREE-PIN
CONNECTOR.
P1
N L2
WHI
WHI
WHIBLK
WHI
WHI
WHI
Page 56
41711.1 052009
L1
BLK
BLK
BLK
LEFT
N
L2
RED
WHI
MAIN ON/OFF SWITCH
RED
GRN
(Late Models only)
WHI
SCHEMATIC WIRING DIAGRAM
CWTF TWIN 4/2 & 0/6 TWO-CIRCUIT
READY INDICATOR
SW1-L
THERMOSTAT
BLK
WHI
LIMIT
RED
SW. & THERMOSTAT
BLU
READY INDICATOR
RED
BLK
(FAUCET SIDE)
THERMAL
SAFETY FUSE
BLK
"KEEP WARM" HEATER
BLK
BLK
GRN
MAIN ON/OFF SWITCH
(Late Models only)
TANK HEATER
L1
BLK
BLK
RIGHT
L2
RED
N
WHI
BLK
BLK
WHI
WHI
SW4-L
SW5-L
SW2-L
WHI
WHI
SW1-R
WHI/RED
WHI/RED
P2-2L
BRN/BLK
LIMIT
THERMOSTAT
BLK BLK
WHI
SW3-L
BLU BLU/BLK
LEFT BREW WARMER
SW2-R
WHI/RED
WHI/RED
SW. & THERMOSTAT
BLU
P1-1L
P1-3L
BLKWHI/RED
SW3-R
RIGHT BREW WARMER
"KEEP WARM" HEATER
WHI/BLU
T1 T5 T3
BREW TIMER
BLU BLU/BLK
P1-3R
T4
T2
P1-1R
BLKWHI/RED
WHI/GRN
WHI
WHI
SW4-R
P2-1L
BLK
LEFT FRONT WARMER
SW5-R
SOL
WHI/BLU
T1 T5 T3
BREW TIMER
WHI
BRN/BLK
WHI
TANK HEATER
P1-2L
WHI/GRN
T4
WHI
T2
P2-2R
WHI
BLK
SOL
P1-2R
BRN/BLK
RIGHT FRONT WARMER
RED
WHI
WHI
WHI
BLK
BLK
WHI
P2-1R
WHI
VIO
P2-3L
VIOBLK
WHI
LEFT REAR WARMER
BLK
VIO
TWO INDIVIDUAL BRANCH
CIRCUITS REQUIRED
EACH RATED
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
10847.0000D 01/07 ©1994 BUNN-O-MATIC CORPORATION
Page 57
P2-3R
VIO
RIGHT REAR WARMER
WHI
41711.1 052009
SCHEMATIC WIRING DIAGRAM CWT TWIN 2/2 & 4/2
W/RECOVERY BOOSTER
(FAUCET)
BLK
BLK REDBLUBLKBLK
THERMAL
FUSE
LEFT TANK HEATER
RIGHT TANK HEATER
SW2
SW3
SW1
LT. LIMIT
THERMOSTAT
LT. SW. & THERMOSTAT
BLU
BLU BLK
WHI WHI
RT. LIMIT
THERMOSTAT
RT. SW. & THERMOSTAT
K1 N.O.
LEFT "KEEP WARM" HEATER
BLU BLK
BLU BLK
WHI WHI
K2 N.O.
RIGHT "KEEP WARM" HEATER
GRN
MAIN ON/OFF SWITCH
(Late Models only)
BLK
L1
BLK
REDBLUBLKBLK
RED
L2
RED
N
WHI
WHI
WHI/RED
SW4
BLK
WHI/GRN
WHI/GRN
WHI/GRN
MODELS 2/2 & 4/2 ONLY
SW7
YEL YEL
SW8
BLK
MODELS 4/2 ONLY
WHI/YEL WHI/YEL
SW9
P1-2
P1-3
P4-2
P4-3
SW6
WHI/RED
WHI/GRN
BLU BLU/BLK
P3-3
WHI WHIRED
LEFT LOWER WARMER
WHI
RIGHT LOWER WARMER
WHI/RED
WHI/RED
P3-1
BLK
WHI/BLU
T1 T5 T3
BREW TIMER
RIGHT
T4
T2
WHI WHIRED
LEFT TOP WARMER
WHI
RIGHT TOP WARMER
SW5
K2
RT
RT
SOL
SOL
WHI/GRN
WHI
P1-1
P2-1
BLU BLU/BLK
P2-3
BLK
WHIBLK
T1 T5 T3
WHIBLK
P4-1
LEFT
BREW TIMER
P3-2
WHI/BLU
T4
T2
K1
LT
SOL
WHI/GRN
WHI
WHI
WHI
WHIBLK
WHIBLK
P2-2
WHI
WHI
RED
WHI
WHI
WHI
RED
WHI
P5-3
LEFT TOP WARMER
P5-2
RIGHT TOP WARMER
BLK
WHI/VIO WHI/VIO
SW10
WHI/BRN WHI/BRN
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
10867.0000F 01/07 © 1995 BUNN-O-MATIC CORPORATION
WHI WHIRED
WHI
Page 58
P5-1
WHI
WHI
41711.1 052009
SCHEMATIC WIRING DIAGRAM CWTF TWIN 0/6 WITH
L1
BLK
BLK
SW3
SW4
L.E.D.
SW9
SW1
SW2
THERMOSTAT
WHI
THERMOSTAT
WHI
WHI/RED
WHI/RED
WHI/GRN
WHI/GRN
WHI/GRN
GRYPNK
WHI
LT.LIMIT
RT. LIMIT
GRY
P1-2
P1-3
L.E.D.
WHI/RED
WHI/GRN
SW7
SW8
PNK
LT. READY INDICATOR
LT. SW. & THERMOSTAT
BLU
BLU
BLU BLK
RT. READY INDICATOR
RT. SW. & THERMOSTAT
BLU
BLU
BLU
LEFT BREW WARMER
RIGHT BREW WARMER
P3-1
BLU
BLU/BLK
P3-3
BLK
GRY
PNK
BLK
WHI/BLU
T1 T5 T3
RIGHT
BREW TIMER
OPTIONAL
INDICATOR
TIMER
RECOVERY BOOSTER
BLKRED
(FAUCET)
THERMAL
SAFETY FUSE
BLK
BLK
BLK
K.1. N.O.
LEFT "KEEP WARM" HEATER
BLKRED
BLK
BLK
BLK
K.2. N.O.
RIGHT "KEEP WARM" HEATER
WHI
P1-1
WHI/RED
WHI/RED
WHI
P3-2
WHI WHIRED
WHI
K2
T4
T2
WHI/ORA
RT
SOL
WHI/GRN
WHI
4
3
2
1
BLKBLK
BLKBLUBLKBLK
RIGHT TANK HEATER
SW5
SW6
GREEN
LEFT TANK HEATER
P2-1
BLU BLU/BLK
BLK
P2-3
T1 T5 T3
LEFT
BREW TIMER
BLK
BLK
WHI/BLU
T4
T2
K1
BLK
LT
SOL
WHI/GRN
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI/ORA
P2-2
WHI/ORA
WHI/ORA
WHI
WHI
WHI
WHI
WHI
SW11
L2
N
REDBLUBLKBLK
RED
RED
P5-2
P5-3
BRN/BLK
RIGHT FRONT WARMER
VIO
BLK
BLK
SW10
BRN/BLK
WHI
VIO
120/240 VOLTS AC 3 WIRE
SINGLE PHASE
P5-1
WHI
WHI
RIGHT REAR WARMER
P4-1
WHI
LEFT FRONT WARMER
WHI
LEFT REAR WARMER
27693.0000D 07/03 © 1996 BUNN-O-MATIC CORPORATION
Page 59
YEL
WHI/VIO
P4-2
P4-3
YEL
WHI
WHI/VIO
RED
SW12
RED
41711.1 052009
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