Bunn CWTF-APS-MV Instruction and safety manual

OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: [phone] F X: [phone]
28182.0000C 9/00 ©1997 Bunn-O-Matic Corporation
BUNN
®
CWTF-MV
CWTF- PS-MV
CWTF-TS-MV
CWTF-TSR-MV

Page 2
INTRODUCTION
This equip ent will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured
for 120V 15 a p, 120V 20 a p, 120/208V 20 a p or 120/240V 20 a p. The brewer has a hot water faucet for
allied beverage use. It is only for indoor use on a sturdy counter or shelf.
W RR NTY
Bunn-O-Matic Corp. (“Bunn”) warrants the equip ent anufactured by it to be co ercially free fro defects
in aterial and work anship existing at the ti e of anufacture and appearing within one year fro the date of
installation. In addition:
1.) Bunn warrants electronic circuit and/or control boards to be co ercially free fro defects in aterial and
work anship for two years fro the date of installation.
2.) Bunn warrants the co pressor on refrigeration equip ent to be co ercially free fro defects in aterial
and work anship for two years fro the date of installation.
3.) Bunn warrants that the grinding burrs on coffee grinding equip ent will grind coffee to eet original factory
screen sieve analysis for three years fro date of installation or for 30,000 pounds of coffee, whichever co es first.
This warranty does not apply to any equip ent, co ponent or part that was not anufactured by Bunn or that,
in Bunn’s judge ent, has been affected by isuse, neglect, alteration, i proper installation or operation, i proper
aintenance or repair, da age or casualty.
THE FOREGOING W RR NTY IS EXCLUSIVE ND IS IN LIEU OF NY OTHER W RR NTY, WRITTEN OR
OR L, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, NY IMPLIED W RR NTY OF EITHER
MERCH NT BILITY OR FITNESS FOR P RTICUL R PURPOSE. The agents, dealers or e ployees of Bunn are
not authorized to ake odifications to this warranty or to ake additional warranties that are binding on Bunn.
Accordingly, state ents by such individuals, whether oral or written, do not constitute warranties and should not
be relied upon.
The Buyer shall give Bunn pro pt notice of any clai to be ade under this warranty by telephone at (217)
529-6601 or by writing to Post Office Box 3227, Springfield, Illinois, 62708-3227. If requested by Bunn, the Buyer
shall ship the defective equip ent prepaid to an authorized Bunn service location. If Bunn deter ines, in its sole
discretion, that the equip ent does not confor to the warranty, Bunn shall repair the equip ent with no charge
for parts during the warranty period and no charge for labor by a Bunn Authorized Service Representative during
the warranty period. If Bunn deter ines that repair is not feasible, Bunn shall, at its sole option, replace the
equip ent or refund the purchase price for the equip ent.
THE BUYER’S REMEDY G INST BUNN FOR THE BRE CH OF NY OBLIG TION RISING OUT OF THE S LE
OF THIS EQUIPMENT, WHETHER DERIVED FROM W RR NTY OR OTHERWISE, SH LL BE LIMITED, S
SPECIFIED HEREIN, TO REP IR OR, T BUNN’S SOLE OPTION, REPL CEMENT OR REFUND.
In no event shall Bunn be liable for any other da age or loss, including, but not li ited to, lost profits, lost sales,
loss of use of equip ent, clai s of Buyer’s custo ers, cost of capital, cost of down ti e, cost of substitute
equip ent, facilities or services, or any other special, incidental or consequential da ages.
#12364.0000
USER NOTICES
Carefully read and follow all notices in this anual and on the equip ent. All labels on the equip ent should
be kept in good condition. Replace any unreadable or da aged labels.
28182 021500

Page 3
#00658.0000
#00656.0000
#00831.0000
#28181.0000
THREE WARMER BREWERS
#28181.0001
ONE WARMER BREWERS
#28181.0002
TWO WARMER BREWERS ALSO CWAPS,
CWTS & CWTSR
USER NOTICES (CONT.)
#02765.0000
28182 021500

Page 4
ELECTRIC L REQUIREMENTS
C UTION - The brewer ust be disconnected fro the power source until specified in Initial Set-Up.
Requires 2-wire,
grounded service
rated 120 volts ac,
15 a p, single
phase, 60 Hz.
Requires 2-wire,
grounded service
rated 120 volts ac,
20 a p, single
phase, 60 Hz.
ELECTRIC L HOOK-UP
C UTION – I proper electrical installation will da age electronic co ponents. This unit is factory wired for
operation on a 120 volt, 15 a p service (1320W Version).
1. An electrician ust provide electrical service and verify that the tank heater connections are connected as
specified in the above diagra .
2. Deter ine the available on-site electrical service.
3. Select the desired unit wattage based on the available on-site electrical service.
4. Using a volt eter, check the voltage and color coding of each conductor at the electrical source.
5. Place the heater switch at the rear of the brewer in the "OFF" (lower) position.
6. Re ove the front panel beneath the sprayhead.
7. Feed the supply leads through the rear panel of the brewer.
8. Using the above diagra s, connect the desired electrical service to the field wiring ter inal block and re ove
the top cover of the brewer to verify the tank heater ter inal block connections.
9. The electrical service connections at the field wiring ter inal block ust agree with the tank heater ter inal
block connections as specified in the above diagra .
10. Before proceeding, verify the voltage at the field wiring ter inal block. Replace the panel and top cover.
11. If plu bing is to be hooked up later be sure the brewer is disconnected fro the power source. If plu bing
has been hooked up, the brewer is ready for Initial Set-Up .
Requires 3-wire,
grounded service
rated 120/208 volts
ac, 20 a p, single
phase, 60 Hz.
1800W VERSION 1320W VERSION 2288W VERSION 3046W VERSION
Requires 3-wire,
grounded service
rated 120/240
volts ac, 20 a p,
single phase, 60
Hz.
P1418
28182 101597

Page 5
1. Flush the water line and securely attach it to the tee.
2. Turn on the water supply.
3. Place an e pty vessel beneath the faucet and lift the handle until water is dispensed.
PLUMBING REQUIREMENTS
These brewers ust be connected to a cold water syste with operating pressure between 20 and 90 psi (138
and 620 kPa) fro a
1⁄2" or larger supply line. A shut-off valve should be installed in the line before the brewer. Install
a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi (345 kPa) . The water
inlet fitting is 1⁄4" flare.
NOTE - Bunn-O-Matic reco ends 1⁄4" copper tubing for installations of less than 25 feet and 3⁄8" for ore than
25 feet fro the 1⁄2" water supply line. A tight coil of copper tubing in the water line will facilitate oving the brewer
to clean the countertop. Bunn-O-Matic does not reco end the use of a saddle valve to install the brewer. The
size and shape of the hole ade in the supply line by this type of device ay restrict water flow.
This equipment must be installed to comply with the Basic Plumbing Code of the
Building Officials and Code dministrators International, Inc. (BOC )
and the Food Service Sanitation Manual of the Food and Drug dministration (FD ).
28182 090100

Page 6
INITI L SET-UP
C UTION - The brewer ust be disconnected fro the power source throughout the initial set-up, except when
specified in the instructions.
1. Insert an e pty funnel into the funnel rails.
2. Place an e pty dispenser under the funnel.
3. Place the heater switch at the rear of the brewer in the "OFF" (lower) position and connect the brewer to the
power source.
4. Connect the brewer to the power source, place the "ON/OFF" switch in the "ON" (upper) position, and
o entarily press and release the start switch. Water will begin flowing into the tank. When water stops
flowing into the tank, initiate a second and a third brew cycle. During the third brew cycle the tank will fill to
its capacity and the excess will flow fro the sprayhead, out of the funnel, and into the dispenser.
5. When the flow of water fro the funnel stops, place the heater switch at the rear of the brewer in the “ON”
(upper) position and wait approxi ately twenty inutes for the water in the tank to heat to the proper
te perature. So e water will drip fro the funnel during this ti e; this is due to expansion and should not
occur thereafter.
6. E pty the dispenser, place the "ON/OFF" switch in the "ON" (upper) position, and o entarily press and
release the start switch.
7. Place the "ON/OFF" switch in the "OFF" (lower) position after water has stopped flowing fro the funnel, and
let the water in the tank reheat to the proper te perature.
8. E pty the dispenser, place the "ON/OFF" switch in the "ON" (upper) position, and o entarily press and release
the start switch. Check the water volu e in the dispenser after water has stopped flowing fro the funnel. It
should be 64 ounces.
9. If not, adjust the brew ti er as required. See Adjusting Brew Volu es. Start, and easure another brew cycle.
10. Repeat step 9 until 64 oz water volu e is achieved.
11. The brewer is now ready for use in accordance with the coffee brewing instructions.
DJUSTING BREW VOLUMES
C UTION - Disconnect the power source fro the brewer prior to the re oval of any panel for the replace ent
or adjust ent of any co ponent.
NOTE: Prior to setting or odifying batch sizes, check that the brewer is connected to water supply, the tank is
properly filled, and a funnel and dispenser are in place.
1. Modifying batch sizes. To odify a batch volu e, first check that the SET/LOCK switch is in the "SET"
position on the circuit board.
To increase a batch size. Press and hold the START or BREW switch until three clicks are heard. Release the
switch (Failure to release the switch within two seconds after the third click causes the volu e setting to be
aborted and previous volu e setting will re ain in e ory) and press it again one or ore ti es. Each ti e
the switch is pressed, two seconds are added to the brew ti e period. Allow the brew cycle to finish in order
to verify that the desired volu e has been achieved.
To decrease a batch size. Press and release the START or BREW switch once for every two-second interval
to be re oved fro the total brew ti e period; then i ediately press and hold down the START or BREW
switch until three clicks are heard. Release the switch. (Failure to release the switch within two seconds after
the third click causes the volu e setting to be aborted and previous volu e setting will re ain in e ory).
Allow the brew cycle to finish in order to verify that the desired volu e has been achieved.
28182 090100

Page 7 28182 090100
2. Setting batch sizes. To set a batch volu e, first check that the SET/LOCK switch is in the "SET" position on
the circuit board. Press and hold the START or BREW 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 volu e
setting to be aborted and previous volu e setting will re ain in e ory). View the level of the liquid being
dispensed. When the desired level is reached, turn the ON/OFF switch to "OFF" (lower). The brewer re e -
bers this volu e and will continue to brew batches of this size until the volu e setting procedure is repeated.
NOTE: When brewing coffee, batch volu es will decrease due to absorption by the coffee grounds.
3. Setting programming disable feature. If it beco es necessary to prevent anyone fro changing brew ti es
once progra ed, you can set the SET/LOCK switch to the "LOCK" position. This will prevent any progra -
ing to be done until switch is once again placed in the "SET" position.
OPER TING CONTROLS
ON/OFF SWITCH
Placing the "ON/OFF" switch in the "OFF" (lower) position stops brewing. Stopping a brew cycle after it has been
started will not stop the flow of water into the funnel until the tank syphons down to its proper level. Placing the
switch in the "ON" (upper) position supplies power to enable the brew circuit on all brewers, and the brew station
war er on CWTF-MV Models.
ST RT SWITCH
Mo entarily pressing and releasing the switch starts a brew cycle when the "ON/OFF" switch is in the "ON" (upper)
position.
NOTE – The "ON/OFF" switch ust be in the "ON" (upper) position to initiate and co plete a brew cycle.
COFFEE BREWING
1. Insert a BUNN® filter into the funnel.
2. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking.
3. Slide the funnel into the funnel rails.
4. Place an e pty dispenser beneath the funnel.
5. Place the "ON/OFF" switch in the "ON" (upper) position. Mo entarily press and release the start switch.
6. When brewing is co pleted, si ply discard the grounds and filter.
CLE NING
1. The use of a da p cloth rinsed in any ild, non-abrasive, liquid detergent is reco ended for cleaning all
surfaces on Bunn-O-Matic equip ent.
2. Check and clean the sprayhead. The sprayhead holes ust always re ain open.
3. With the sprayhead re oved, insert the deli ing spring (provided) all the way into the sprayhead tube. When
inserted properly, no ore than two inches of spring should be visible. Saw back and forth five or six ti es.
NOTE – In hard water areas, this ay need to be done daily. It will help prevent li ing proble s in the brewer
and takes less than a inute.
DJUSTING BREW VOLUMES(cont.)

Page 8
TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and re edies for the ost likely proble s
encountered. If the proble re ains after exhausting the troubleshooting steps, contact the Bunn-O-Matic
Technical Service Depart ent.
• Inspection, testing, and repair of electrical equip ent should be perfor ed only by qualified service personnel.
• All electronic co ponents have 120 volt ac and low voltage dc potential on their ter inals. Shorting of
ter inals or the application of external voltages ay result in board failure.
• Inter ittent operation of electronic circuit boards is unlikely. Board failure will nor ally be per anent. If an
inter ittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
ter inal or cri p.
• Solenoid re oval requires interrupting the water supply to the valve. Da age ay result if solenoids are
energized for ore than ten inutes without a supply of water.
• The use of two wrenches is reco ended whenever plu bing fittings are tightened or loosened. This will help
to avoid twists and kinks in the tubing.
• Make certain that all plu bing connections are sealed and electrical connections tight and isolated.
• This brewer is heated at all ti es. Keep away fro co bustibles.
W RNING • Exercise extre e caution when servicing electrical equip ent.
• Unplug the brewer when servicing, except when electrical tests are specified.
• Follow reco ended service procedures
• Replace all protective shields or safety notices
PROBLEM
Brew cycle will not start
PROB BLE C USE
1. No water
2. No power or incorrect voltage to
the brewer
3. ON/OFF Switch
4. Start Switch
REMEDY
Water lines and valves to the brewer
ust be open.
(A1) Check the ter inal block for
120 volts across the black and
white ter inals on two wire 120
volt brewers.
(A2) Check the ter inal block for
120 volts ac across the red and
white and the black and white ter-
inals on 120/208V and 120/240V
volt brewers.
(B) Check circuit breakers or fuses.
Refer to Service - ON/OFF Switch
for testing. See page 18
Refer to Service - Start Switch for
testing procedures. See page 20
28182 090100

Page 9
TROUBLESHOOTING (cont.)
PROBLEM
Brew cycle will not start (cont.)
Water is not hot
PROB BLE C USE REMEDY
5. Ti er
6. Solenoid Valve
7. Water strainer/flow control
(.222 GPM)
1. Tank Heater Switch
2. Li it Ther ostat
C UTION - Do not eli inate or
bypass li it ther ostat. Use only
replace ent part #29329.1000
3. Control Ther ostat
4. Tank Heater(s)
5. Fuse Holder and Fuse Asse bly
6. Ther al Fuse
Refer to Service - Ti er for testing
procedures. See page 26 or 27
Refer to Service - Solenoid Valve
for testing procedures. See page
19
(A) Direction of flow arrow ust
be pointing towards brewer.
(B) Re ove the strainer/flow con-
trol and check for obstructions.
Clear or replace.
Refer to Service - Tank Heater
Switch for testing procedures. See
page 23
Refer to Service - Li it Ther o-
stat for testing procedures. See
page 17
Refer to Service - Control Ther-
ostat for testing procedures. See
page 15
Refer to Service - Tank Heater(s)
for testing procedures. See page
21
Refer to Service -Fuse Holder and
Fuse Asse bly for testing proce-
dures. See page 16
Refer to Service - Ther al Fuse
for testing procedures. See page
25
28182 090100

Page 10
TROUBLESHOOTING (cont.)
PROBLEM
Inconsistent beverage level in
dispenser
Consistently low beverage level
in the dispenser
Spitting or excessive stea ing
PROB BLE C USE
1. Strainer/flow control (.222
GPM)
2. Syphon Syste
3. Li e Build-up
C UTION - Tank and tank co po-
nents should be deli ed regularly
depending on local water condi-
tions. Excessive ineral build-up
on stainless steel surfaces can
initiate corrosive reactions result-
ing in serious leaks.
4. Water Pressure
1. Ti er
2. Strainer/flow Control (.222
GPM)
1. Li e Build-up
C UTION - Tank and tank co po-
nents should be deli ed regularly
depending on local water condi-
tions. Excessive ineral build-up
on stainless steel surfaces can
initiate corrosive reactions result-
ing in serious leaks.
REMEDY
(A) Direction of flow arrow ust
be pointing towards the brewer.
(B) Re ove the strainer/flow con-
trol and check for obstruction.
Clear or replace.
The brewer ust be level or slightly
lower in front to syphon properly.
Inspect the tank asse bly for ex-
cessive li e deposits. Deli e as
required.
The water pressure to the brewer
ust be at least 20 psi (138 kPa).
Refer to Service - Ti er for adjust-
ing procedures. See page 26 or 27
(A) Direction of flow arrow ust
be pointing towards brewer.
(B) Re ove the strainer/flow con-
trol and check for obstructions.
Clear or replace.
Inspect tank asse bly for exces-
sive li e deposits. Deli e as re-
quired.
28182 021500

Page 11
TROUBLESHOOTING (cont.)
PROBLEM
Spitting or excessive stea ing
(cont.)
Dripping fro sprayhead
Water flows into tank continuously
(ON/OFF Switch "ON")
Water flows into tank continuously
(ON/OFF Switch "OFF")
Beverage overflows dispenser
PROB BLE C USE
2. Control Ther ostat
1. Syphon Syste
2. Li e Build-up
C UTION - Tank and tank co po-
nents should be deli ed regularly
depending on local water condi-
tions. Excessive ineral build-up
on stainless steel surfaces can ini-
tiate corrosive reactions resulting
in serious leaks.
3. Solenoid Valve
1. Ti er
1. Solenoid Valve
1.Dispenser
2. Ti er
3. Solenoid Valve
REMEDY
Refer to
Service - Control Ther-
ostat for testing procedures. See
page 15
The brewer ust be level or slightly
lower in front to syphon properly.
Inspect the tank asse bly for ex-
cessive li e deposits. Deli e as
required.
Re ove the solenoid valve and
clear any obstructions. Rebuild or
replace the valve if necessary.
See page 19
Refer to
Service - Ti er for testing
procedures. See page 26 or 27
Re ove the Solenoid Valve and
clean any obstruction. Rebuild or
replace the valve if necessary. See
page 19
The dispenser ust be co pletely
e pty before starting a brew cycle.
Refer to Service - Ti er for testing
procedures. See page 26 or 27
Re ove the Solenoid Valve and
clean any obstruction. Rebuild or
replace the valve if necessary. See
page 19
28182 090100

Page 12
TROUBLESHOOTING (cont.)
PROBLEM
Weak beverage
Dry coffee grounds re ain in the
funnel
Brewer is aking unusal noises
PROB BLE C USE
1. Filter Type
2. Coffee Grind
3. Sprayhead
4. Funnel Loading
5. Water Te perature
1. Funnel Loading
1. Solenoid
2. Plu bing Lines
3. Water Supply
REMEDY
BUNN® paper filters ust be used
for proper extraction.
A fine or drip grind ust be used
for proper extraction.
A six-hole stainless steel spray-
head ust be used for proper
extraction.
The BUNN® paper filter ust be
centered in the funnel and the bed
of ground leveled by gentle shak-
ing.
Place an e pty funnel on an e pty
dispenser beneath the sprayhead.
Initiate a brew cycle and check the
water te perature i ediately
below the sprayhead with a ther-
o eter. The reading should not
be less than 195°F(91°C). Adjust
the control ther ostat to increase
the water te perature. Replace if
necessary.
The BUNN® paper filter ust be
centered in the funnel and the bed
of grounds leveled by gently shak-
ing.
The nut on the solenoid ust be
tight or it will vibrate during op-
eration.
Plu bing lines should not be rest-
ing on the counter top.
(A) The brewer ust be connected
to a cold water line.
(B) Water pressure to the brewer
ust not exceed 90 psi (620 kPa).
Install a regulator if necessary to
lower the working pressure to ap-
proxi ately 50 psi (345 kPa).
28182 090100

Page 13
TROUBLESHOOTING (cont.)
PROBLEM
Brewer is aking unusal noises
(cont.)
Low beverage serving te pera-
ture (CWTF Only)
PROB BLE C USE
4. Tank Heater(s)
1. War er
REMEDY
Re ove and clean li e off the
tank heater(s). See page 21
Refer to Service - War er ele-
ent for testing procedures. See
page 29
28182 090100

Page 14
SERVICE
This section provides procedures for testing and
replacing various ajor co ponents used in this
brewer should service beco e necessary. Refer to
Troubleshooting for assistance in deter ining the
cause of any proble .
W RNING - Inspection, testing, and repair of electri-
cal equip ent should be perfor ed 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.
NOTE: All illustrations in the service section of this
anual are of a CWTF Model except where specified.
COMPONENT CCESS
W RNING - Disconnect the brewer fro the power
source before the re oval of any panel or the replace-
ent of any co ponent.
All co ponents are accessible by the re oval of
the top cover, front inspection panel and war er
plate(s).
The top cover is attached with one #4-40 screw.
The front inspection panel is attached with four #6-
32 screws on CWTF Models, six #6-32 screws on
CWTF-APS, TS Models and eight #6-32 screws on
CWTF-TSR Models.
The war er asse bly (CWTF Models) is attached with
three #4-40 screws.
Contents
Control Ther ostat............................................. 15
Fuse Holder and Fuse Asse bly ......................... 16
Li it Ther ostat ................................................ 17
ON/OFF Switch.................................................... 18
Solenoid Valve (Inlet) ......................................... 19
Start Switch (Brew) ............................................ 20
Tank Heater(s) .................................................... 21
Tank Heater Switch ............................................. 23
Ther al Fuse ...................................................... 25
Ti er (Early Models) .......................................... 26
Digital Ti er (Late Models) ................................ 27
War er Ele ent (CWTF Models Only) ............... 29
Wiring Diagra s................................................ 30 FIG. 1 COMPONENT ACCESS P1417
CWTF MODELS
CWTF MODELS
CWTF-APS
28182 090100

Page 15
SERVICE (cont.)
CONTROL THERMOST T
Location:
The control ther ostat is located inside the trunk
on the upper left side of the co ponent bracket.
Test Procedures:
1. Disconnect the brewer fro the power source.
2. Locate the blue wire on the control ther ostat.
3. With a volt eter, check the voltage across the blue
wire on the control ther ostat and the white insert
on two wire 120 volt, three wire120/208 volt or
120/240 volt ter inal block. Connect the brewer to
the power source. The indication ust be:
a) 120 volts ac for two wire 120 volt odels.
b) 120 volts ac for three wire 120/208 volt odels
or 120/240 volt odels.
4. Disconnect the brewer fro the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagra s and check the brewer wiring har-
ness.
5. Locate the black wire on the control ther ostat.
6. Gently re ove the capillary bulb and gro et
fro the tank.
7. With a volt eter, check the voltage across the
black wire of the control ther ostat and the white
insert on two wire 120 volt odel, three wire 120/
208 volt odel or three wire 120/240 volt odel
ter inal blocks when the control ther ostat is
turned fully clockwise. Connect the brewer to the
power source. The indication ust be:
a) 120 volts ac for two wire 120 volt odels.
b) 120 volts ac for three wire 120/208 volt odels
or 120/240 volt odels.
8. Disconnect the brewer fro the power source.
If voltage is present as described, reinstall the capillary
tube into the tank to the line 4.5" above the bulb, the
control ther ostat is operating properly.
If voltage is not present as described, replace the
ther ostat.
Re oval and Replace ent:
1. Re ove wires fro control ther ostat.
2. Re ove the ther ostat capillary bulb by fir ly
pulling up on the capillary at the tank lid. This will
disengage the gro et fro the tank lid.
3. Re ove the one #8-32 screw securing the control
ther ostat to the co ponent bracket in the trunk.
4. Slide the gro et 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 gro et fir ly and evenly
so that the groove in the gro et 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.
NOTE - The capillary tube ust be clear of any electri-
cal ter ination and not kinked.
7. Using one #8-32 screw secure the control ther o-
stat to the upper left side of the co ponent bracket
inside the trunk.
8. Refer to Fig. 3 when reconnecting the wires.
9. Adjust the control ther ostat as required.
FIG. 2 CONTROL THERMOSTAT P1415.40
28182 090100
P1382
FIG. 3 CONTROL THERMOSTAT TERMINALS
BLU to Li it Ther ostat
BLK to Tank Heater
Ter inal Block

Page 16
SERVICE (cont.)
FUSE HOLDER ND FUSE SSEMBLY
FIG. 4 FUSE HOLDER AND FUSE ASSEMBLY
Location:
The fuse holder and fuse asse bly is located on
the left rear side of the brewer.
Test Procedures:
1. Disconnect the brewer fro the power source.
2. Re ove the cap fro the fuse holder and re ove
the fuse.
3. With an oh eter, check for continuity through
the fuse.
If continuity is present as described, reinstall the fuse,
the fuse is operating properly.
If continuity is not present as described, replace the
fuse.
Re oval and Replace ent:
1. Re ove the cap fro the holder.
2. Re ove fuse fro the fuse holder and discard.
3. Install new 20 a p fuse in the holder.
4. Reinstall fuse holder cap.
P1415
28182 090100

Page 17
LIMIT THERMOST T
Location:
The li it ther ostat is located inside the rear of
the hood on the center rear of the tank lid.
Test Procedures:
1. Disconnect the brewer fro the power source.
2. Disconnect the blue and black wires fro the li it
ther ostat.
3. With an oh eter, check for continuity across the
li it ther ostat ter inals.
If continuity is present as described, the li it ther o-
stat is operating properly.
If continuity is not present as described, replace the
li it ther ostat.
FIG. 5 LIMIT THERMOSTAT P1415.40
SERVICE (cont.)
P1800
BLU to Control
Ther ostat
BLK to
Tank Heater
Switch
FIG. 6 LIMIT THERMOSTAT TERMINALS
Re oval and Replace ent:
1. Re ove all wires fro li it ther ostat ter inals.
2. Carefully slide the li it ther ostat out fro under
the retaining clip and re ove li it ther ostat.
3. Carefully slide the new li it ther ostat into the
retaining clip.
4. Refer to Fig. 6 when reconnecting the wires.
28182 090100

Page 18
ON/OFF SWITCHES
SERVICE (cont.)
FIG. 7 ON/OFF SWITCHES
P1417
CWTF
MODELS
CWTF-APS
MODELS
28182 090100
FIG. 8 ON/OFF SWITCH TERMINALS
6. Check for continuity across the center and lower
ter inal with the switch in the "ON" (upper) posi-
tion. Continuity ust not be present when the
switch is in the "OFF" (lower) position.
If continuity is present as described, reconnect the
black wire to the center ter inal and the re aining
wire to the lower ter inal.
If continuity is not present as described, replace the
switch.
Re oval and Replace ent:
1. Re ove the wires fro the switch ter inals.
2. Turn off water supply and re ove faucet.
3. Re ove front end cap.
4. Co press the clips inside the hood and gently
push the switch through the opening.
5. Push the new switch into the opening and spread
the clips to hold switch in the hood.
6. Reinstall front end cap.
7. Reinstall faucet and connect brewer to the water
supply.
8. Refer to Fig. 8 when reconnecting the wires.
Location:
The ON/OFF switches are located on the front of the
hood.
Test Procedure:
1. Disconnect the brewer fro the power source.
2. Viewing the switch fro the back re ove the white
wire fro the upper ter inal and the black wire
fro the center ter inal.
3. With a volt eter, check the voltage across the
white wire and the black wire. Connect the brewer
to the power source. The indication ust be:
a) 120 volts ac for two wire 120 volt odels.
b) 120 volts ac for three wire 120/208 volt or 120/
240 volt odels.
4. Disconnect the brewer fro the power source.
If voltage is present as described, reconnect the white
wire and proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagra and check the brewer wiring harness.
5. With the black wire re oved, re ove the wire
fro the lower ter inal.
WHI to Ter inal Block
(White Insert)
BLK to Ter inal Block
(Black Insert)
Ter inal #1 (See Chart below)
P1918
Connect wire to Terminal #1 as follows:
CWTF Models:
Lower War er ........................................................ WHI/RED
Front War er ......................................................... BRN/BLK
Rear War er ................................................................... VIO
CWTF- PS, TS & TSR Models:
Start Switch ............................................................ WHI/RED

Page 19
Location:
The solenoid valve is located inside the trunk on
the lower center part of the co ponent bracket.
Test Procedures:
1. Disconnect the brewer fro the power source.
2. Disconnect both wires fro the solenoid valve.
Connect the brewer to the power source. With the
lower war er "ON/OFF" switch in the "ON" (upper)
position press the start switch.
3. With a volt eter, check the voltage across the two
wires. The indication ust be:
a) 120 volts ac for two wire 120 volt odels.
b) 120 volts ac for three wire 120/208 volt and 120/
240 volt odels.
4. Disconnect the brewer fro the power source
If voltage is present as described, proceed to #5
If voltage is not present as described, refer to Wiring
Diagra s and check brewer wiring harness.
5. Check for continuity across the solenoid valve coil
ter inals.
If continuity is present as described, reconnect the
wires fro the ti er.
If continuity is not present as described, replace the
solenoid valve
SERVICE (cont.)
FIG. 9 SOLENOID VALVE
SOLENOID V LVE
P1415.40
28182 090100
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
agnet attracts.
7. Disconnect the brewer fro the power source.
If the sound is heard as described and water will not
pass through the solenoid valve, there ay be a
blockage in the water line before the solenoid valve, or
the solenoid valve ay require inspection for wear,
and re oval of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Re oval and Replace ent:
1. Re ove all wires fro the solenoid valve.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and fro the sole-
noid valve.
4. Re ove the two #8-32 screws securing the sole-
noid ounting bracket to the co ponent bracket.
Re ove solenoid bracket and solenoid valve as an
asse bly.
5. Re ove 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 ounting bracket.
7. Using two #8-32 screws install solenoid valve and
bracket to the co ponent bracket.
8. Securely fasten the water lines to and fro the
solenoid valve.
9. Refer to Fig. 10 when reconnecting the wires.
FIG. 10 SOLENOID VALVE TERMINALS P1132
WHI fro Ti er (Old Style
Ti er)
WHI/GRN fro Ti er
(Digital Ti er)
BLK fro Ti er (Old Style
Ti er)
WHI/BLU fro Ti er
(Digital Ti er)

Page 20
SERVICE (cont.)
ST RT SWITCH
FIG.11 START SWITCH P1417
Location:
The start switch is located on the front of the hood
in the center of switch panel.
Test Procedure:
1. Disconnect the brewer fro the power supply.
2. Disconnect the blue wire fro the top switch
ter inal and the white/red wire fro the botto
switch ter inal.
3. Check for continuity across the two ter inals on
the switch when it is held in the lower position.
Continuity ust not be present across these ter-
inals in the upper position.
If continuity is present as described, reconnect the
blue wire to the top ter inal and the white/red wire to
the botto ter inal. The switch is operating properly.
If continuity is not present as described, replace the
switch.
FIG. 12 START SWITCH TERMINALS P1133
28182 090100
Re oval and Replace ent:
1. Re ove the blue wire and white/red wire fro the
start switch.
2. Turn off the water supply and re ove faucet.
3. Re ove front end cap.
4. Co press the clips inside the hood and gently
push the switch through the opening.
5. Push new switch into the opening and spread the
clips to hold the start switch in the hood.
6. Reinstall front end cap.
7. Reinstall faucet and reconnect the brewer to the
water supply.
8. Refer to Fig. 12 when reconnecting the wires.
BLU to BLU/BLK Lead
fro Ti er P1
WHI/RED to ON/OFF
Switch