®
BUNN
TW
TWF
DISCONTINUED VERSION
The information in this manual
is no longer current.
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
TELEPHONE: (217) 529-6601 FAX: (217) 529-6644
10510.0000 11/00 © 1990 Bunn-O-Matic Corporation
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec-
tion. All notices on the equipment should be kept in good condition. Replace any unreadable or damaged labels
#00656.0000
#03408.0000
#00831.0000
#02822.0000
#03409.0000
10510 081599
Page 3
ELECTRICAL REQUIREMENTS
CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.
120V model brewers require 2-wire, grounded service rated 120 volt
ac, 15 amp, single phase, 60 Hz.
L2 RED
120/208V model brewers require 3-wire, grounded service rated 120/
208 volt, 20 amp, single phase, 60 Hz.
120V.A.C.
WHITE
208V.A.C.
NEUTRAL
L1 BLACK
120V.A.C.
Electrical Hook-Up
CAUTION – Improper electrical installation will damage electronic components.
1. An electrician must provide electrical service as specified.
2. Remove the top lid and rotate the control thermostat knob fully counterclockwise to the "OFF" position.
3. a) 120V brewers have an attached cordset. Plug in the brewer and proceed to #6.
b) 120/208V brewers, feed the cord through the strain relief at the rear of the brewer and connect it to the
terminal block.
4. Using a voltmeter, check the voltage and color coding of each conductor at the power source.
5. Connect the brewer to the power source and verify the voltage at the terminal block.
6. If plumbing is to be hooked up later be sure the brewer is disconnected from the power source. If plumbing
has been hooked up, the brewer is ready for Initial Set-Up.
PLUMBING REQUIREMENTS
These brewers must be connected to a cold water system with operating pressure between 20 (128) and 90
1
psi (620 kPa) from a ⁄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
1
water inlet fitting is ⁄4" flare.
1
3
NOTE - Bunn-O-Matic recommends ⁄4" copper tubing for installations of less than 25 feet and ⁄8" for more than
1
25 feet from the ⁄2" water supply line. A tight coil of copper tubing in the water line will facilitate moving the
brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the
brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
1. Remove the shipping cap(s) from the bulkhead fitting(s) on the rear of the brewer.
2. Attach the flare fitting from the short piece of tubing on the strainer/flow control (supplied) to the water inlet
fitting(s) at the rear of the brewer.
3. Flush the water line and securely attach it to the flare fitting on the tee or strainer/flow control.
4. Turn on the water supply.
5. On brewers with a faucet, place an empty vessel beneath the faucet and lift the handle until water is dis-
pensed.
This equipment must be installed to comply with the Basic Plumbing Code of the
Building Officials and Code Administrators International, Inc. (BOCA)
and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).
10510 071000
Page 4
PLUMBING REQUIREMENTS (cont.)
P1394
P1392
BREWERS W/FAUCET
BREWERS W/OUT FAUCET
INITIAL SET-UP
CAUTION – The brewer must be unplugged throughout the initial set-up, except when specified in the instruc-
tions.
1. Remove the top lid from the brewer.
2. Rotate the control thermostat knob fully counterclockwise to the “OFF” position and replace the top lid.
3. Insert the funnel (empty) into the funnel rails.
4. Place an empty tea dispenser on the brewer base. Be prepared to empty the dispenser a few times.
5. Plug in the brewer, place the TEA/OFF/COFFEE switch in the “COFFEE” position, and momentarily press the
start switch. When the flow of water into the tank stops, press the START switch to initiate a second cycle.
Wait until the flow of water stops and start a third cycle. During the third cycle, the tank will fill to its capacity
and the excess will flow from the funnel into the dispenser. Empty the dispenser when this third cycle stops.
6. Place the TEA/OFF/COFFEE switch in the “TEA” position and begin another brew cycle.
7. Measure the total water volume from the dispenser. It should be approximately (396 ounces.)
8. If not, adjust the Iced Tea Brew Timer (right timer) as required. (See Adjusting Brew Volume)
9. Start, and measure another cycle.
10. Repeat steps 7-9 until the recommended total water volume (396 ounces) is achieved.
11. The concentrate valve is pre-adjusted to deliver the correct ratio of brew water to dilution water.
12. Unplug the brewer, remove the top lid, rotate the control thermostat knob fully clockwise to the “ON” position
and replace the top lid.
13. Empty the dispenser.
14. Plug in the brewer and wait for the water in the tank to heat to brewing temperature (approximately 20
minutes). Some water will drip from the funnel during this time; this is due to expansion and should not
occur thereafter.
15. Place the TEA/OFF/COFFEE switch in the “COFFEE” position and begin another brew cycle. Empty the reser-
voir after water has stopped flowing from the funnel.
16. Allow the water in the tank to heat to the proper temperature and begin another brew cycle.
17. Measure the total water volume from the dispenser. It should be approximately 64 ounces.
18. If not, adjust the Coffee Brew Timer (left timer) as required. (See Adjusting Brew Volume)
19. Start, and measure another cycle.
20. Repeat steps 17-19 until the recommended total water volume (64 ounces) is achieved.
21 The brewer is now ready to brew approximately one-half gallon of hot coffee or 3-gallons of freshly brewed
room temperature tea.
10510 071000
Page 5
INITIAL SET-UP (cont.)
ADJUSTING BREW VOLUMES
CAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacement
or adjustment of any component.
NOTE: Prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the tank is
properly filled, and a funnel and server are in place.
1. Modifying batch sizes. To modify a batch volume, 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 volume setting to be
aborted and previous volume setting will remain in memory) and press it again one or more times. 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.
To decrease a batch size. Press and release the START or BREW switch once for every two-second interval
to be removed from the total brew time period; then immediately 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 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 batch sizes. To set a batch volume, 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 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” (lower). The brewer remem-
bers this volume and will continue to brew batches of this size until the volume setting procedure is repeated.
NOTE: When brewing coffee, batch volumes will decrease due to absorption by the coffee grounds.
3. Setting programming disable feature. If it becomes necessary to prevent anyone from changing brew times
once programmed, you can set the SET/LOCK switch to the “LOCK” position. This will prevent any program-
ming to be done until switch is once again placed in the “SET” position.
CLEANING
CAUTION – Do not keep brewed tea overnight. Clean and sanitize your iced tea dispenser daily
1. Remove and thoroughly clean the brew funnel. The funnel tip and screen must be free from any tea particles
or residue. Reassemble the funnel.
2. Unplug the brewer. Remove and thoroughly rinse the sprayhead. The holes must be open and clear of any
mineral deposits. Wipe the sprayhead panel clean with a damp cloth.
3. Insert the deliming spring into the sprayhead fitting until no more than one inch is visible and move it in and
out 5 or 6 times. Insert the spring into the airvent hole in the sprayhead panel and move it in and out 5 or 6
times. Reattach the sprayhead.
4. Wash the entire outside surface of the brewer with a clean damp cloth.
10510 071000
Page 6
OPERATING CONTROLS
A. TEA/OFF/COFFEE Switch
TEA– Placing the switch in the left position allows the start switch to activate a timed brew cycle delivering .5
gallon of tea concentrate and 2.5 gallons of dilution water into the dispenser.
OFF – Placing the switch in the center position stops the brew cycle. Stopping a brew cycle after it has started
will not stop the flow of water into the funnel until the tank syphons down to its level. The switch should always
be placed in this position after a brew cycle and whenever the brewer is unattended.
COFFEE– Placing the switch in the right position allows the start switch to activate a timed brew cycle delivering
.5 gallon of hot coffee into an airpot dispenser.
B. Start Switch
Starts a brew cycle when the TEA/OFF/COFFEE switch is in either the “TEA” or “COFFEE” position.
BREWING
1. Begin brewing with a clean empty brew funnel and dispenser. (Be sure the server lid doesn't interfere with
the flow of dilution water)
2. Insert a BUNN® filter into the funnel.
3. Pour the packet of fresh tea leaves or coffee into the filter. Approximately 4 ounces is recommended for tea.
4. Level the bed of tea leaves or coffee by gently shaking.
5. Slide the funnel into the funnel rails until it stops.
6. Place the TEA/OFF/COFFEE switch in the desired position.
7. Momentarily press the start switch.
CAUTION – The funnel contains hot liquid. Remove funnel slowly.
8. Carefully remove the brew funnel and discard its contents after liquid stops flowing from the funnel.
9. Place the TEA/OFF/COFFEE switch in the “OFF” position to prevent a false start.
10510 071000
Page 7
TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic
Technical Service Department.
•
•
•
Inspection, testing, and repair of electrical equipment should be performed only by qualified service person-
nel.
All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of
terminals or the application of external voltages may result in board failure.
Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an
intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
•
•
Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are
energized for more than ten minutes without a supply of water.
The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will
help to avoid twists and kinks in the tubing.
•
•
Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
This brewer is heated at all times. Keep away from combustibles.
WARNING –
• Exercise extreme caution when servicing electrical equipment.
• Unplug the brewer when servicing, except when electrical tests are specified.
• Follow recommended service procedures
• Replace all protective shields or safety notices
Problem
Probable Cause
Remedy
Brew cycle(s) will not start
1. No water
Water lines and valves to the brewer
must be open.
2. No power or incorrect voltage to Check circuit breakers or fuses.
the brewer
3. External Strainer/ Flow Control (A) Direction of flow arrow must be
(.750 GPM)
pointing towards the brewer.
(B) Remove the strainer/flow con-
trol and check for obstructions.
Clear or replace.
4. TEA/OFF/COFFEE Switch
5. Start Switch
Refer to Service - TEA/OFF/COFFEE
Switch for testing. See page 26
Refer to Service - Start Switch for
testing procedures. See page 27
10510 071000
Page 8
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Brew cycle(s) will not start (cont.)
6. Brew Timer
A) Iced Tea
Refer to Service - Brew Timer (Iced
Tea) for testing procedures. See
page 20 or 21
Refer to Service - Brew Timer (Hot
Coffee) for testing procedures. See
page 17 or 18
B) Hot Coffee
Refer to Service - Brew Solenoid
Valve (Iced Tea) for testing proce-
dures. See page 16
7. Brew Solenoid Valve
A) Iced Tea
Refer to Service- Brew Solenoid
Valve (Hot Coffee) for testing pro-
cedures. See page 15
B) Hot Coffee
(A) Direction of flow arrow must be
pointing towards brewer.
8. Internal Flow control (.195 GPM)
(Hot Coffee Only)
(B) Remove the flow control and
check for obstructions. Clear or re-
place.
Brew water is not hot
Refer to Service - Limit Thermostat
for testing procedures. See page 25
1. Limit Thermostat
CAUTION - Do not eliminate or by-
pass limit thermostat. Use only
BOM
replacement
part
#29329.1000
Refer to Service - Thermal fuse for
testing procedures. See page 29
2. Thermal Fuse
CAUTION - Do not eliminate or by-
pass thermal fuse.
Refer to Service - Control Thermo-
stat for testing procedures. See
page 23
3. Control Thermostat
Refer to Service - Tank Heater for
testing procedures. See page 28
4. Tank Heater
Dilution (Iced Tea) cycle will not
start
Refer to Service - TEA/OFF/COFFEE
Switch for testing procedures. See
page 26
1. TEA/OFF/COFFEE Switch
10510 071000
Page 9
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Dilution (Iced Tea) cycle will not
start (cont.)
2. Start Switch
Refer to Service - Start Switch for
testing procedures. See page 27
3. Brew Timer (Iced Tea)
Refer to Service- Brew Timer (Iced
Tea) for testing procedures. See
page 20 or 21
4. Brew Solenoid Valve (Iced Tea)
5. Dilution Solenoid Valve
Refer to Service - Brew Solenoid
Valve (Iced Tea) for testing proce-
dures. See page 16
Refer to Service - Dilution Solenoid
Valve for testing procedures. See
page 24
Inconsistent beverage level in dis- 1. Internal Flow Control (.195 GPM) (A) Direction of flow arrow must be
penser (Hot Coffee)
pointing towards the brewer.
(B) Remove the flow control and
check for obstruction. Clear or re-
place.
2. Syphon System
3. Lime Build-up
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for ex-
CAUTION - Tank and tank compo- cessive lime deposits. Delime as
nents should be delimed regularly
depending on local water condi-
tions. Excessive mineral build-up
on stainless steel surfaces can ini-
tiate corrosive reactions resulting
in serious leaks.
required.
4. Water Pressure
The water pressure to the brewer
must be at least 20 psi (128 kPa).
Consistently high or low beverage 1. Brew Timer
level in the dispenser
With the TEA/OFF/COFFEE switch in
the "TEA" position adjust the needle
valve to achieve the recommended
76 oz of concentrate then the timer
to achieve a total of 396 oz for each
three-gallon brew cycle.
10510 071000
Page 10
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Consistently high or low beverage
level in the dispenser. (cont.)
(A) Direction of flow arrow must be
pointing towards brewer.
2. External Strainer/Flow Control
(.750 GPM)
(B) Remove the strainer/flow con-
trol and check for obstructions.
Clear or replace.
Spitting or excessive steaming
Inspect tank assembly for excessive
lime deposits. Delime as required.
1. Lime Build-up
CAUTION - Tank and tank compo-
nents should be delimed regularly
depending on local water condi-
tions. Excessive mineral build-up
on stainless steel surfaces can ini-
tiate corrosive reactions resulting
in serious leaks.
Refer to Service - Control Thermo-
stat for testing procedures. See
page 23
2. Control Thermostat
Drip-out time too long
The brew funnel should be cleaned
thoroughly before each brew cycle
to lessen the chance of tea leaf par-
ticles clogging the drip-out tip.
1. Funnel Tip
Dripping from sprayhead
The brewer must be level or slightly
lower in front to syphon properly.
1. Syphon System
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
2. Lime Build-up
CAUTION - Tank and tank compo-
nents should be delimed regularly
depending on local water condi-
tions. Excessive mineral build-up
on stainless steel surfaces can ini-
tiate corrosive reactions resulting
in serious leaks.
Refer to Service - Brew Solenoid
Valve (Iced Tea) for testing proce-
dures. See page 16
3. Brew Solenoid Valve
A) Iced Tea
Refer to Service- Brew Solenoid
Valve (Hot Coffee) for testing pro-
cedures. See Page 15
B) Hot Coffee
10510 071000
Page 11
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
1. Brew Timer
A) Iced Tea
Water flows into tank continuously
(TEA/OFF/COFFEE Switch in the
"TEA or "COFFEE" position)
Refer to Service - Brew Timer (Iced
Tea) for testing procedures. See
page 20 or 21
B) Hot Coffee
Refer to Service- Brew Timer (Hot
Coffee) for testing procedures. See
page 17 or 18
1. Brew Solenoid Valve
A) Iced Tea
Water flows into tank continuously
(TEA/OFF/COFFEE Switch in the
"OFF" position)
Refer to Service - Brew Solenoid
Valve (Iced Tea) for testing proce-
dures. See page 16
B) Hot Coffee
1. Dispenser
Refer to Service- Brew Solenoid
Valve (Hot Coffee) for testing pro-
cedures. See page 15
Beverage overflows dispenser
The dispenser must be completely
empty before starting a brew cycle.
2. Brew Timer
A) Iced Tea
Refer to Service - Brew Timer (Iced
Tea) for testing procedures. See
page 20 or 21
B) Hot Coffee
Refer to Service- Brew Timer (Hot
Coffee) for testing procedures. See
page 17 or 18
3. Brew Solenoid Valve
A) Iced Tea
Remove the Iced Tea Brew Solenoid
Valve and clean any obstruction.
Rebuild or replace the valve if nec-
essary. See page 16
B) Hot Coffee
Remove the Hot Coffee Brew Sole-
noid Valve and clean any obstruc-
tion. Rebuild or replace the valve if
necessary. See page 15
4. Dilution Solenoid Valve
Refer to Service - Dilution Solenoid
Valve for testing procedures. See
page 24
10510 071000
Page 12
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
BUNN® paper filters must be used
for proper extraction.
Weak beverage
1. Filter Type
2. Tea or Coffee
3. Sprayhead
A sufficient quantity of fresh tea
leaves or coffee should be used for
proper extraction.
A six-hole (or seven-hole for Mod-
els with 90 oz concentrate option)
stainless steel sprayhead must be
used for proper extraction.
The BUNN® paper filter must be cen-
tered in the funnel and the bed of tea
leaves leveled by gentle shaking.
4. Funnel Loading
Place an empty funnel on an empty
dispenser beneath the sprayhead. Ini-
tiate a brew cycle and check the wa-
ter temperature immediately below
the sprayhead with a thermometer.
The reading should not be less than
200°F(93°C). Adjust the control ther-
mostat to increase the water tempera-
ture. Replace if necessary.
5. Water Temperature
The BUNN® paper filter must be cen-
tered in the funnel and the bed of
grounds leveled by gently shaking.
Dry tea leaves remain in the funnel
Brewer is making unusual noises
1. Funnel Loading
1. Solenoid(s)
The nut on the solenoid(s) must be
tight or it will vibrate during opera-
tion.
Plumbing lines should not be rest-
ing on the counter top.
2. Plumbing Lines
3. Water Supply
(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 ap-
proximately 50 psi(345 kPa).
Remove and clean lime off the tank
heater. See page 28
4. Tank Heater
10510 071000
Page 13
SERVICE
This section provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel. The brewer should be disconnected
from the power source when servicing, except when
electrical tests are required and the test procedure spe-
cifically states to plug-in the brewer.
COMPONENT ACCESS
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replace-
ment of any component.
All components are accessible by the removal of
the top cover and rear inspection panel.
The top cover is attached with four #6-32 screws.
RemovalofthetopcoverwillallowaccesstoTEA/OFF/
COFFEE switch, start switch, brew timers, control
thermostat, limit thermostat, thermal fuse and tank
heater.
The rear inspection panel is attached with six #8-
32 screws. Remove of the rear panel will allow access
to the brew solenoid valves and the dilution solenoid
valve .195 GPM flow control and check valve.
P1959.60
FIG. 1 COMPONENT ACCESS
Contents
Brew Solenoid Valve (Hot Coffee) ....................... 15
Brew Solenoid Valve (Iced Tea) .......................... 16
Brew Timer (Hot Coffee- Early Models) .............. 17
Digital Brew Timer (Hot Coffee-Late Models) ..... 18
Brew Timer (Iced Tea - Early Models) ................. 20
Digital Brew Timer (Iced Tea-Late Models) ......... 21
Control Thermostat............................................. 23
Dilution Solenoid Valve ....................................... 24
Limit Thermostat ................................................ 25
TEA/OFF/COFFEE Switch ..................................... 26
Start Switch ........................................................ 27
Tank Heater......................................................... 28
Thermal Fuse ...................................................... 29
Half Batch Switch (Optional)............................... 30
Wiring Diagrams................................................. 31
10510 071000
Page 14
SERVICE (cont.)
If continuity is not present as described, replace the
solenoid valve.
BREW SOLENOID VALVE (HOT COFFEE)
6. Check the hot coffee solenoid valve for coil ac-
tion. Connect the brewer to the power source. With
TEA/OFF/COFFEE switch in the "COFFEE" position
press the 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 block-
age 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.
P2198.50
Removal and Replacement:
FIG. 2 HOT COFFEE BREW SOLENOID VALVE
Location:
Viewing the brewer from the, rear the hot coffee
brew solenoid valve is mounted on the left side of the
mounting bracket.
1. Remove all wires from solenoid valves.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
noid valves.
4. Remove the two #8-32 keps nuts holding the
mounting bracket to the brewer base.
5. Lift out the bracket.
6. Remove the two #10-32 slotted-head screws hold-
ing the hot coffee solenoid valve to the mounting
bracket.
7. Securely install the new hot coffee solenoid valve
to the mounting bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the white/red and white/green wires
from the hot coffee solenoid valve. With the TEA/
OFF/COFFEE switch in the "COFFEE" position press
the START switch.
3. With a voltmeter, check the voltage across the
white/red and white/green wires. Connect the
brewer to the power source. The indication must
be 120 volts ac for two wire 120 volt models and
three wire 120/208 volt models.
8. Attach the mounting bracket to the brewer base.
9. Securely fasten the water lines to and from the
solenoid valves.
10. Refer to Fig. 3 when reconnecting the wires.
WHI/GRN to Hot Coffee Timer TL4
WHI/RED to Hot Coffee Timer TL1
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.
HOT COFFEE
BREW SOLENOID
5. Check for continuity across the hot coffee sole-
noid valve coil terminals.
ICED TEA BREW
SOLENOID
If continuity is present as described, reconnect the
white/red and white/green wires from the hot coffee
brew timer.
DILUTION
SOLENOID
P1364
FIG.3 SOLENOID VALVE TERMINALS
10510 081599
Page 15
SERVICE (cont.)
If continuity is not present as described, replace the
solenoid valve.
BREW SOLENOID VALVE (ICED TEA)
6. Check the iced tea solenoid valve for coil action.
Connect the brewer to the power source. With TEA/
OFF/COFFEE switch in the "TEA" position press
the START switch and listen carefully in the vicin-
ity 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 block-
age 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.
P2198.50
Removal and Replacement:
FIG. 4 ICED TEA BREW SOLENOID VALVE
Location:
Viewingthebrewerfromtherear,theicedteabrew
solenoid valve is mounted in the center of the mount-
ing bracket.
1. Remove all wires from solenoid valves.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
noid valves.
4. Remove the two #8-32 keps nuts holding the
mounting bracket to the brewer base.
5. Lift out the bracket.
6. Remove the two #10-32 slotted-head screws hold-
ing the iced tea brew solenoid valve to the mount-
ing bracket.
7. Securely install the new iced tea brew solenoid
valve to the mounting bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the white/violet and white/blue wires
from the iced tea brew solenoid valve. With the
TEA/OFF/COFFEE switch in the "TEA" position press
the START switch.
3. With a voltmeter, check the voltage across the
white/violet and white/blue wires. Connect the
brewer to the power source. The indication must
be 120 volts ac for two wire 120 volt models and
three wire 120/208 volt models.
8. Attach the mounting bracket to the brewer base.
9. Securely fasten the water lines to and from the
solenoid valves.
10. Refer to Fig. 5 when reconnecting the wires.
4. Disconnect the brewer from the power source.
WHI/BLU to Dilution
Solenoid
WHI/VIO to Dilution
Solenoid
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.
HOT COFFEE
BREW SOLENOID
5. Check for continuity across the iced tea brew so-
lenoid valve coil terminals.
ICED TEA BREW
SOLENOID
If continuity is present as described, reconnect the
white/violet and white/blue wires from the iced tea
brew timer.
DILUTION
SOLENOID
P1364
FIG.5 SOLENOID VALVE TERMINALS
10510 081599
Page 16
SERVICE (cont.)
If continuity is not present as described, refer to the
Wiring Diagrams and check the wiring harness.
BREW TIMER (HOT COFFEE- Early Models)
5. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the TEA/OFF/COFFEE
switch is in the “COFFEE” position and the START
switch is momentarily placed in the lower posi-
tion. Connect the brewer to the power source.
The indication must be 120 volts ac for two wire
120 volt models and three wire 120/208 volt mod-
els for approximately twenty seconds and then re-
turn to its previous indication.
6. Disconnect the brewer from the power source.
If voltage is present as described, the timer is operat-
ing properly. Adjust the timer dial as required.
If voltage is not present as described, replace the timer.
Removal and Replacement:
1. Remove all wires from the timer.
P1961.60
2. Remove the circuit board and dial plate from the
brackets.
FIG. 6 HOT COFFEE BREW TIMER
Location:
The hot coffee brew timer is located in the hood on
theleftside. Itconsistsofadialplateandcircuitboard.
3. Install the new timer circuit board as described in
Late Model Timer section on the following pages.
4. Refer to Fig. 9 when reconnecting the wires.
5. Install the Timer Setting decal, provided with the
replacement timer kit, to the rear of the schematic,
on the top cover.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the wires from terminals TL3, TL4, & TL5
of the timer and rotate the dial fully counterclock-
wise.
6. Adjust the timer as required. Refer to Late Model
Timer section on the following pages.
2. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the TEA/OFF/COFFEE
switch is in the “COFFEE” 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 volt models.
WHI to Power Cord (120V Models)
or WHI to Terminal Block (120/208V
Models)
WHI/RED to Hot Coffee Solenoid
WHI/RED to TEA/OFF/COFFEE Switch
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.
4. Check for continuity across the white/orange and
white/yellow wires when the START switch is held
in the lower position.
WHI/YEL to START Switch
WHI/GRN to Hot Coffee
Solenoid
If continuity is present as described, reconnect the
wires to terminals TL3, TL4, & TL5 of the timer board
and proceed to #5.
P1962
WHI/ORA to START Switch
OLD STYLE
FIG. 7 HOT COFFEE BREW TIMER TERMINALS
10510 071000
Page 17
SERVICE (cont.)
DIGITAL BREW TIMER (HOT COFFEE -Late Models)
6. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the "TEA/OFF/COFFEE"
switch is in the "COFFEE" position. Connect the
brewer to the power source. The indication must
be 0 volts.
If voltage is as described, proceed to #7.
If voltage is not as described, disconnect the brewer
from the power source and replace the timer.
7. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the "TEA/OFF/COFFEE"
switch is in the "COFFEE" position. Connect the
brewer to the power source and press the START
switch. Theindicationmustbe120voltsacfortwo
wire 120 volt models and three wire 120/208 volt
models.
P2198.50
FIG. 8 DIGITAL BREW TIMER
Location:
If voltage is present as described, the brew timer is
operating properly. Reset the timer as required, to
obtain the desired brew volume.
If voltage is not present as described, disconnect the
brewer from the power source and replace the timer.
Thetimerislocatedinsidethehoodontheleftside.
Test Procedure.
NOTE:Donotremoveorinstallwireswhiletimerboard
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. Remove the two #8-32 screws securing circuit
board to the mounting bracket.
3. Remove circuit board and spacers (as required).
4. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the "TEA/OFF/COFFEE"
switch is in the "COFFEE" 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 volt models.
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. 9 when reconnecting the
wires.
5. Install new circuit board with spacers (as re-
quired) to the component mounting bracket.
6. Adjust the timer as described below.
5. Disconnect the brewer from the power source.
Timer Setting:
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the
Wiring Diagrams and check the brewer wiring har-
ness.
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.
10510 071000
Page 18
SERVICE (cont.)
DIGITAL BREW TIMER (HOT COFFEE - Late
Models)(cont.)
ume setting will remain in memory.)
View the level of the liquid being dispensed. When
the desired level is reached, turn the TEA/OFF/COF-
FEE switch to “OFF”.
NOTE: Several ounces of water will continue to sy-
phon 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.
1. Modifying brew volumes. To modify a brew vol-
ume, first check that the SET/LOCK switch is in the
“SET” position on the circuit board.
To increase a brew volume, place the TEA/OFF/
COFFEE switch in the “COFFEE” 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 sec-
onds 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 sec-
onds 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: When brewing coffee, volume will decrease due
to absorption by the coffee grounds.
3. Setting programming disable feature. If it be-
comes necessary to prevent anyone from changing
brew time once programmed, you can set the SET/
LOCK switch to the “LOCK” position. This will pre-
vent any further programming until switch is once
again put into the “SET” position.
To decrease a brew volume, place the TEA/OFF/
COFFEE switch in the “COFFEE” position, press and
release the START switch once for every two-second
interval to be removed from the total brew time pe-
riod; 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 af-
ter 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,
first check that the SET/LOCK switch is in the “SET”
position on the circuit board. Place the TEA/OFF/COF-
FEE switch in the “COFFEE” 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 vol-
TL1 - WHI/RED to Hot Coffee Solenoid and
WHI/RED to TEA/OFF/COFFEE Switch
TL2 - WHI to Power Cord (120V Models) or
WHI to Terminal Block (120/208V Models)
TL3 - WHI/ORN to START Switch
TL4 - WHI/GRN to Hot Coffee Solenoid
TL5 - WHI/YEL to START Switch
P2037
FIG. 9 DIGITAL TIMER WIRING
10510 071000
Page 19
SERVICE (cont.)
BREW TIMER (ICED TEA - Early Models)
5. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the TEA/OFF/COFFEE
switch is in the “TEA” position and the START
switch is momentarily placed in the lower posi-
tion. Connect the brewer to the power source. The
indication must be 120 volts ac for two wire 120
volt models and three wire 120/208 volt models
for approximately twenty seconds and then return
to its previous indication.
6. Disconnect the brewer from the power source.
If voltage is present as described, the timer is operat-
ing properly. Adjust the timer dial as required.
If voltage is not present as described, replace the timer.
P1961.50
Removal and Replacement:
1. Remove all wires from the iced tea brew timer.
2. Remove the circuit board and dial plate from the
brackets.
3. Install the new timer circuit board as described in
Late Model Timer section on the following pages.
4. Refer to Fig. 13 when reconnecting the wires.
5. Install the Timer Setting decal, provided with the
replacement timer kit, to the rear of the schematic
on the top cover.
FIG. 10 ICED TEA BREW TIMER
Location:
The iced tea brew timer is located in the hood on
the right side. It consists of the dial plate and circuit
board.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the wires from terminals TL3, TL4, & TL5
of the iced tea timer and rotate the dial fully coun-
terclockwise.
5. Adjust the timer as required. Refer to Late Model
Timer section on the following pages.
2. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the TEA/OFF/COFFEE
switch is in the “TEA” 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 volt models.
WHI to Power Cord (120V Models)
or WHI to Terminal Block (120/208V
Models)
WHI/VIO to Iced Tea Solenoid
WHI/VIO to TEA/OFF/COFFEE Switch
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 Diagram and check the wiring harness.
4. Check for continuity across the orange and yel-
low wires when the START switch is held in the
lower position.
If continuity is present as described, reconnect the
wires to terminals TL3, TL4, & TL5 of the timer board
and proceed to #5.
YEL to START Switch
WHI/BLU to Iced Tea Solenoid
ORN to START Switch
P1962
EARLY MODELS
If continuity is not present as described, refer to the
Wiring Diagrams and check the wiring harness.
FIG. 11 ICED TEA BREW TIMER TERMINALS
10510 071000
Page 20
SERVICE (cont.)
6. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the "TEA/OFF/COFFEE"
switch is in the "TEA" position. Connect the brewer
to the power source. The indication must be 0
volts.
DIGITAL BREW TIMER (ICED TEA - Late Models)
If voltage is as described, proceed to #7.
If voltage is not as described, disconnect the brewer
from the power source and replace the timer.
7. With a voltmeter, check the voltage across termi-
nals TL1 and TL4 when the "TEA/OFF/COFFEE"
switch is in the "TEA" position. Connect the brewer
to the power source and press the START switch.
The indication must be 120 volts ac for two wire
120 volt models and three wire 120/208 volt
models.
P2198.50
If voltage is present as described, the brew timer is
operating properly. Reset the timer as required, to
obtain the desired brew volume.
If voltage is not present as described, disconnect the
brewer from the power source and replace the timer.
FIG. 12 DIGITAL BREW TIMER
Location:
The timer is located inside the hood, on the right
side.
Test Procedure.
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. 13 when reconnecting the
wires.
NOTE:Donotremoveorinstallwireswhiletimerboard
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. Remove the two #8-32 screws securing circuit
board to the hood.
3. Remove circuit board and spacers (as required).
4. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the "TEA/OFF/COFFEE"
switch is in the "TEA" 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 volt models.
5. Install new circuit board with spacers (as re-
quired) to the component mounting bracket.
6. Adjust the timer as described below.
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.
5. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the
Wiring Diagrams and check the brewer wiring har-
ness.
10510 071000
Page 21
SERVICE (cont.)
NOTE: Several ounces of water will continue to sy-
phon 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.
DIGITAL BREW TIMER (ICED TEA - Late
Models)(cont.)
1. Modifying brew volumes. To modify a brew vol-
ume, first check that the SET/LOCK switch is in the
“SET” position on the circuit board.
To increase a brew volume, place the TEA/OFF/
COFFEE switch in the “TEA” position, press and hold
the START switch until three clicks are heard. Release
the switch and press it again one or more times. (Fail-
ure 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.
3. Setting programming disable feature. If it be-
comes necessary to prevent anyone from changing
brew time once programmed, you can set the SET/
LOCK switch to the “LOCK” position. This will pre-
vent any further programming until switch is once
again put into the “SET” position.
To decrease a brew volume, place the TEA/OFF/
COFFEE switch in the “TEA” position, press and re-
lease the START switch once for every two-second
interval to be removed from the total brew time pe-
riod; 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 af-
ter 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,
first check that the SET/LOCK switch is in the “SET”
position on the circuit board. Place the TEA/OFF/COF-
FEE switch in the “TEA” 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.)
TL1 - WHI/VIO to Iced Tea Solenoid and
WHI/VIO to TEA/OFF/COFEE Switch
TL2 - WHI to Power Cord (120V Models) or
WHI to Terminal Block (120/208V Models)
TL3 - ORN to START Switch
TL4 - WHI/BLU to Iced Tea Solenoid
TL5 - YEL to START Switch
P2037
View the level of the liquid being dispensed. When
the desired level is reached, turn the TEA/OFF/COF-
FEE switch to “OFF”.
FIG. 13 DIGITAL TIMER WIRING
10510 071000
Page 22
SERVICE (cont.)
8. Disconnect the brewer from the power source.
CONTROL THERMOSTAT
If voltage is present as described, reinstall the capil-
lary tube into the tank to the line 4.5" above the bulb,
the control thermostat is operating properly.
If voltage is not present as described, replace the ther-
mostat.
Removal and Replacement:
1. Remove both wires from the control thermostat
terminals.
2. Remove the thermostat capillary bulb by firmly
pulling up on the capillary tube at the tank lid. This
will disengage the grommet from the tank lid.
3. Remove the #8-32 screw holding the control ther-
mostat to its bracket.
4. Slide the grommet to the line 4.5" above the bulb
on the new capillary tube.
P2198.50
FIG. 14 CONTROL THERMOSTAT
Location:
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.
The control thermostat is located inside hood on
the right side to the left of the iced tea brew timer.
Test Procedures:
6. Carefully bend the capillary tube so that the tube
and bulb inside the tank are in a vertical position.
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across the blue
wire on the control thermostat and the white wire
on the tank heater for 120 volt two wire models or
red wire on the tank heater for 120/208 volt three
wire models. Connect the brewer to the power
source. The indication must be 120 volts ac for
two wire 120 volt models and 208 volts ac for
three wire 120/208 volt models.
NOTE – The capillary tube must be clear of any elec-
trical termination and not kinked.
7. Fasten the new control thermostat to its bracket.
8. Refer to Fig. 15 when reconnecting the wires.
9. Adjust the control thermostat as required.
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 brewer wiring harness.
F
HI
F
O F F
N
N
U
B U N N
4. Locate the black wire on the control thermostat.
5. Gently remove the capillary bulb and grommet
from the tank.
6. With a voltmeter, check the voltage across the
black wire of the control thermostat and the white
wire on the tank heater for 120 volt two wire mod-
els or red wire on the tank heater for 120/208 volt
three wire models when the control thermostat is
turned fully clockwise. Connect the brewer to the
power source. The indication must be 120 volts
ac for two wire 120 volt models and 208 volts ac
for three wire 120/208 volt models.
BLK to Tank Heater or
Thermal Fuse on Models
W/Faucet
BLU to Limit Thermostat
P1390
FIG. 15 CONTROL THERMOSTAT TERMINALS
10510 081599
Page 23
SERVICE (cont.)
5. Check the solenoid valve for coil action. Connect
the brewer to the power source, place the TEA/
OFF/COFFEE switch in the “TEA” position and mo-
mentarily place the START switch in the lower po-
sition and release. Listen carefully in the vicinity
of the solenoid valve for a “clicking” sound as the
coil magnet attracts.
DILUTION SOLENOID VALVE
6. 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 block-
age in the water line before or after 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:
P2198.50
1. Remove all wires from the solenoid valves.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
noid valves.
4. Remove the two #8-32 keps nuts holding the
mounting bracket to the trunk base.
FIG. 16 DILUTION SOLENOID VALVE
Location:
Viewing the brewer from the rear the dilution so-
lenoid is mounted on the right side of the solenoid
mounting bracket which is secured to the trunk base.
5. Lift out the bracket.
6. Remove the two #10-32 slotted-head screws hold-
ing the solenoid valve to the mounting bracket.
7. Securely install the new solenoid valve to the
mounting bracket.
8. Attach the mounting bracket to the trunk base.
9. Securely fasten the water lines to and from the
solenoid valves.
Test Procedure:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across the
white/blue and white/violet wires on the dilution
solenoid terminals when the TEA/OFF/COFFEE
switch is in the “TEA” position and the START
switch is momentarily placed in the lower posi-
tion. Connect the brewer to the power source.
The indication must be 120 volts ac for two wire
120 volt models and three wire 120/208 volt mod-
els.
10. Refer to Fig. 17 when reconnecting the wires.
WHI/BLU to Iced
Tea Brew Timer
TL4
3. Disconnect the brewer from the power supply.
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.
WHI/VIO to Iced
Tea Brew Timer
TL1
HOT COFFEE
BREW SOLENOID
4. Remove both wires from the coil and check for
continuity across the coil terminals.
ICED TEA BREW
SOLENOID
If continuity is present as described, reconnect the
white/blue and white/violet wires and proceed to #5.
If continuity is not present as described, replace the
solenoid valve.
DILUTION
SOLENOID
P1364
FIG.17 SOLENOID VALVE TERMINALS
10510 081599
Page 24
SERVICE (cont.)
LIMIT THERMOSTAT
5. With a voltmeter, check the voltage across the ex-
posed terminal of the limit thermostat and the
white wire from the power cord or the red wire
from the terminal block. Connect the brewer to
the power source. The indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 208 volts ac for three wire 120/208 volt mod-
els.
6. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the blue
wire to the limit thermostat. The limit thermostat is
operating properly.
If voltage is not present as described, replace the limit
thermostat.
Removal and Replacement
1. Remove both wires from the limit thermostat ter-
minals.
2. Carefully slide the limit thermostat out from un-
der the retaining clip.
3. Carefully slide the new limit thermostat into the
retaining clip.
P2198.50
FIG. 18 LIMIT THERMOSTAT
Location:
The limit thermostat is located inside the hood on
the tank lid.
4. Refer to Fig. 19 when reconnecting the wires.
Test Procedure:
1. Disconnect the brewer from the power source and
remove the black wire from the limit thermostat.
2. With a voltmeter, check the voltage across the
black wire removed from the limit thermostat and
the white or red wire on the tank heater terminal.
Connect the brewer to the power source. The in-
dication must be:
BLU to Control
Thermostat
a) 120 volts ac for two wire 120 volt models.
b) 208 volts ac for three wire 120/208 volt mod-
els.
3. Disconnect the brewer from the power source.
BLK to Power Cord
or Terminal Block
If voltage is present as described, reconnect the black
wire and proceed to #4.
P1800
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
FIG. 19 LIMIT THERMOSTAT TERMINALS
4. Remove the blue wire from the limit thermostat.
10510 081599
Page 25
SERVICE (cont.)
TEA/OFF/COFFEE SWITCH
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
6. Check for continuity across the center and left ter-
minals of the top row when switch is in the "TEA"
position and the center and right terminals of the
top row when the switch is in the "COFFEE” posi-
tion.
If continuity is present as described, replace the wires,
the switch is operating properly.
If continuity is not present as described, replace the
switch.
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 the switch captive in the hood.
4. Refer to FIG. 21 when reconnecting the wires.
P1959.60
FIG. 20 TEA/OFF/COFFEE SWITCH
BLK to Limit Thermostat
WHI/VIO to Tea
Location:
WHI/RED to Coffee
Brew Timer TL1
Brew Timer TL1
The TEA/OFF/COFFEE switch is located in the front
of the hood, above and to the left of the brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the black, white/violet and white/red
wires from the switch terminals.
3. With a voltmeter, check the voltage across the
black wire removed from the TEA/OFF/COFFEE
switch and the white wire remaining on the switch
terminal.
4. Connect the brewer to the power source. The in-
dication must be 120 volts ac for two wire 120
volt models and three wire 120/208 volt models,
5. Disconnect the brewer from the power source.
WHI to Tea Brew
Timer TL2
P1367
FIG.21 TEA/OFF/COFFEE SWITCH TERMINALS
10510 081599
Page 26
SERVICE (cont.)
START SWITCH
4. Check for continuity across the two terminals on
the left side of the switch when it is held in the
lower position. Continuity must not be present
across these terminals in the upper position.
If continuity is present as described, reconnect the
wires, the switch is operating properly.
If continuity is not present as described, replace the
switch.
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 the switch captive in the hood.
4. Refer to Fig. 23 when reconnecting the wires.
WHI/ORN to
Coffee Brew
Timer TL3
ORN to Iced Tea
Brew Timer TL3
P1959.60
FIG. 22 START SWITCH
Location:
The start switch is located in the front of the hood,
above and to the right of the brew funnel.
YEL to Iced
Tea Brew
Timer TL5
WHI/YEL to
Coffee Brew
Timer TL5
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the wires from all four terminals.
3. Check for continuity across the two terminals on
the right side of the switch when it is held in the
lower position. Continuity must not be present
across these terminals in the upper position.
P1368
FIG. 23 START SWITCH TERMINALS
If continuity is present as described, proceed to #4.
If continuity is not present as described, replace the
switch.
10510 081599
Page 27
SERVICE (cont.)
TANK HEATER
Removal and Replacement:
1. Disconnect the black wire and the white or red
wire from the tank heater terminals.
2. Remove sprayhead and the hex nut securing the
sprayhead tube to the hood. Set aside for reas-
sembly.
3. Disconnect vent tube.
4. Disconnect and remove the faucet tube.
5. Remove the eight #8-32 nuts securing the tank
lid to the tank.
6. Remove the tank lid with limit thermostat, spray-
head tube, faucet tube, tank heater and vent tube.
7. Remove the two hex nuts securing the tank heater
to the tank lid. Remove tank heater with gaskets
and discard.
8. Install new tank heater with gaskets on the tank
lid and secure with two hex nuts.
P2198.50
FIG. 24 TANK HEATER
9. Install tank lid with limit thermostat, sprayhead
tube, tank heater, faucet tube and vent tube using
eight #8-32 nuts.
10. Secure sprayhead tube to hood using a hex nut.
11. Install sprayhead.
12. Connect vent tube to fitting.
13. Connect the faucet tube.
14. Reconnect the wires to the limit thermostat and
tank heater. See limit thermostat section in this
manual when reconnecting wires.
15. Refer to Fig. 25 when reconnecting the tank heater
wires.
Location:
The tank heater is located inside the tank and se-
cured to the tank lid.
Test Procedures:
1. Disconnect the brewer from the power supply.
2. With a voltmeter, check the voltage across the
black and white wires on 120 volt models or the
black and red wires for 120/208 volt models. Con-
nect the brew to the power source. The indication
must be:
a) 120 volts ac for two wire 120 volt models .
b) 208 volts ac for three wire 120/208 volt mod-
els.
BLK to Control
Thermostat or
Thermal Fuse
WHI to Power Cord
(120V Models) or
RED to Terminal
Block (120/208V
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 wiring harness.
4. Disconnect the black wire and the white wire or
red wire from the tank heater terminals.
5. Check for continuity across the tank heater termi-
nals.
If continuity is present as described, reconnect the
wires, the tank heater is operating properly.
If continuity is not present as described, replace the
tank heater.
NOTE- If the tank heater remains unable to heat, re-
move and inspect heater for cracks in the sheath.
P1369
FIG. 25 TANK HEATER TERMINALS
10510 081599
Page 28
SERVICE (cont.)
THERMAL FUSE (Models W/Faucet Only)
Removal and Replacement:
1. Disconnect the thermal fuse from the right tank
heater terminal and the black lead from the con-
trol thermostat.
2. Remove thermal fuse and discard.
3. Connect new thermal fuse to the right tank heater
terminal and the black lead from the control ther-
mostat
4. Refer to Fig. 27 when reconnecting wires.
BLK Lead from
Control Thermostat
Thermal Fuse
I
HI
H
F
F
O F F
O
N
N
B U N N
U
B
P2198.50
FIG. 26 THERMAL FUSE
Location:
The thermal fuse is located inside the hood con-
nected to the right tank heater terminal.
Tank Heater Terminals
Test Procedures:
P1393
1. Disconnect the brewer from the power source.
2. Disconnect the thermal fuse from the right tank
heater terminal and the black lead from the con-
trol thermostat.
FIG. 27 THERMAL FUSE THERMINALS
3. With an ohmmeter, check for continuity across
the thermal fuse terminals.
If continuity is present as described, the thermal fuse
is operating properly.
If continuity is not present as described, replace the
thermal fuse.
10510 081599
Page 29
SERVICE (cont.)
HALF BATCH SWITCH (Optional)
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 the switch captive in the hood.
4. Refer to FIG. 29 when reconnecting the wires.
GRY to Iced Tea
Brew Timer
PNK to Iced Tea
Brew Timer
P1038
P1959.60
FIG.29 HALF BATCH SWITCH TERMINALS
FIG. 28 HALF BATCH SWITCH
Location:
The HALF BATCH switch is located in the front of
the hood, above and to the far left of the brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. With an ohmmeter, check for continuity between
the two terminals of the switch.
If continuity is present as described, the switch is
operating properly.
If continuity is not present as described, replace the
switch.
10510 081599
Page 30
10510 081599
Page 31
READY INDICATOR
BLU
BLK
10510 112000
Page 32
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