This equipment will brew a three or five-gallon batch of fresh tea into an awaiting dispenser. The tea will be
dispensed at approximately room temperature to conserve ice. The brewer is only for indoor use on a sturdy
counter or shelf and requires a minimium of 40 inches of clearance above the counter.
WARRANTY
Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from
defects in material and workmanship existing at the time of manufacture and appearing within one year from the
date of installation. In addition:
1.) Bunn warrants electronic circuit and/or control boards to be commercially free from defects in material
and workmanship for two years from the date of installation.
2.) Bunn warrants the compressor on refrigeration equipment to be commercially free from defects in mate-
rial and workmanship for two years from the date of installation.
3.) Bunn warrants that the grinding burrs on coffee grinding equipment will grind coffee to meet original
factory screen sieve analysis for three years from date of installation or for 30,000 pounds of coffee, whichever
comes first.
This warranty does not apply to any equipment, component or part that was not manufactured by Bunn or
that, in Bunn’s judgement, has been affected by misuse, neglect, alteration, improper installation or operation,
improper maintenance or repair, damage or casualty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR
ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of Bunn are
not authorized to make modifications to this warranty or to make additional warranties that are binding on Bunn.
Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not
be relied upon.
The Buyer shall give Bunn prompt notice of any claim to be made under this warranty by telephone at (217)
529-6601 or by writing to Post Office Box 3227, Springfield, Illinois, 62708-3227. If requested by Bunn, the
Buyer shall ship the defective equipment prepaid to an authorized Bunn service location. If Bunn determines, in
its sole discretion, that the equipment does not conform to the warranty, Bunn shall repair the equipment 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 determines that repair is not feasible, Bunn shall, at its sole option, replace
the equipment or refund the purchase price for the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE
SALE OF THIS EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AS
SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND.
In no event shall Bunn be liable for any other damage or loss, including, but not limited to, lost profits, lost
sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.
Page 2
10777 041500
Page 3
#00831.0000
#00656.0000
Page 3
Page 4
ELECTRICAL REQUIREMENTS
CAUTION - The brewer must be disconnected from the power source until specified in
The brewer requires either 2-wire, grounded service rated 120 volts ac, or 3-wire, grounded service rated
120/208 or 120/240 volts ac, 20 amp, single phase, 60 Hz. Refer to the product's dataplate above the dilution
nozzle for actual voltage of your particular brewer model.
1. An electrician must provide electrical service as specified.
2. Remove top lid and rotate the control thermostat knob fully counterclockwise to the "OFF" position and
replace top lid.
3. Remove the lower rear panel, 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 electrical source.
5. Connect the brewer to the power source and verify 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
.
WARNING - The brewer must be electrically grounded using the green screw near the terminal block. Do not
assume a plumbing line will provide an adequate ground.
Initial Set-Up.
PLUMBING REQUIREMENTS
The brewer must be connected to a cold water system with operating pressure between 30 and 90 psi(207
and 621 kPa) from a 1⁄2" or larger supply line. A shut-off valve should be installed in the line before the brewer.
Install a regulator in the line when pressure is greater than 90 psi(621 kPa) to reduce it to 50 psi(345 kPa). The
water inlet fitting is 1⁄4" flare.
NOTE - Bunn-O-Matic recommends 1⁄4" copper tubing for installations of less than 25 feet and 3⁄8" for more than
25 feet from the 1⁄2" water supply line. A tight coil of copper tubing in the water line will facilitate moving the
brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the
brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
This equipment must be installed to comply with the Basic Plumbing Code of the
Building Officials and Code Administrators International, Inc. (BOCA)
and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).
1. Attach the female fitting from the short piece of tubing on the strainer/flow control (supplied) to the water
inlet fitting at the rear of the brewer.
2. Flush the water line and securely attach it to the flare fitting on the strainer/flow control.
3. Turn on the water supply.
Page 4
10777 041500
Page 5
INITIAL SET-UP
CAUTION - The brewer must be disconnected from the power source throughout the
Initial Set-Up
, except
when specified in the instructions.
1. Remove the top lid from the brewer.
2. Rotate the control thermostat knob fully counterclockwise to the "OFF" position. Set the three-gallon timer
knob at 4 minutes, the five-gallon timer knob at 6 3/4 minutes, and replace the top lid.
3. Insert an empty funnel into the funnel rails.
4. Place an empty dispenser on the brewer base.
5. Connect the brewer to the power source. Place the On/Off switch in the lighted "ON" position, the dilution
switch in the "NO DILUTION" position, the batch selector in the 'FIVE GALLON" position, and momentarily
press the start switch. Water will flow into the tank for approximately 6 3/4 minutes. Press the start switch
again to initiate a second cycle. When the second cycle stops, press the start switch once more. 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 the flow of water from the funnel stops.
6. Place the dilution switch in the "DILUTION" position and press the start switch to begin another brew cycle.
When the flow of water stops, measure the total water volume from the dispenser. It should be approximately
5 gallons and 15 ounces. (655 ounces.)
7. If not, disconnect the brewer from the power source, remove the top lid, and adjust the five gallon timer knob
up or down, as required.
8. Replace the top lid, connect the brewer to the power source, start, and measure another cycle.
9. Repeat steps 6-8 until the recommended total water volume (655 ounces) is achieved.
10. Place the batch selector in the 'THREE GALLON" position and press the start switch to begin another brew
cycle. When the flow of water stops, measure the total water volume from the dispenser. It should be approximately 3 gallons and 9 ounces. (393 ounces)
11. If not, disconnect the brewer from the power source, remove the top lid, and adjust the three gallon timer
knob up or down, as required.
12. Replace the top lid, connect the brewer to the power source, start, and measure another cycle.
13. Repeat steps 10-12 until the recommended total water volume (393 ounces) is achieved.
14. The concentrate is pre-adjusted to deliver the correct ratio of water over the funnel to dilution water.
15. Disconnect the brewer from the power source, remove the top lid, rotate the control thermostat knob fully
clockwise to the "ON" position and replace the top lid.
16. Empty the dispenser.
17. Connect the brewer to the power source 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.
18. Begin another brew cycle. Empty the reservoir after water has stopped flowing from the funnel.
19. Allow the water in the tank to heat to the proper temperature.
20. The brewer is now ready to brew approximately 3 or 5 gallons of freshly brewed room temperature tea using
approximately 1 ounce of loose leaves per gallon of finished iced tea.
Page 5
10777 041500
Page 6
OPERATING CONTROLS
A. Lighted ON/OFF Switch
ON - Placing the switch in the lighted upper position allows the start switch to activate a timed brew cycle.
OFF - Placing the switch in the lower position stops the brew cycle. Stopping a brew cycle after it has been startedwill not stop the flow of water into the funnel until the tank syphons down to its proper level. The switch should
always be placed in this position after a brew cycle and whenever the brewer is unattended.
B. Dilution/No Dilution Selector Switch
Dilution - Placing the switch in the upper position produces fully diluted iced tea from the brew cycle.
No Dilution - Placing the switch in the lower position produces only tea concentrate that will need to be diluted
in another manner before it is ready to serve.
C. 3-Gallon/5-Gallon Selector Switch3-Gallon - Placing the switch in the upper position produces three gallons of iced tea (set on "DILUTION") or 76
oz. of iced tea concentrate (set on "NO DILUTION") from the brew cycle.
5-Gallon - Placing the switch in the lower position produces five gallons of iced tea (set on "DILUTION") or 126
oz. of iced tea concentrate (set on "NO DILUTION") from the brew cycle.
D. Start Switch
Starts a brew cycle when the ON/OFF switch is in the "ON" position.
CLEANING
CAUTION - CLEAN AND SANITIZE YOUR ICED TEA BREWER DAILY
1. Remove and thoroughly clean the entire 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. Reattach the sprayhead.
4. Wash the entire outside surface of the brewer with a clean damp cloth.
CAUTION - DO NOT KEEP BREWED ICED TEA OVERNIGHT. THE SERVER MUST BE CLEANED DAILY.
TEA BREWING
1. Begin each brew cycle with a clean empty brew funnel and server. (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 loose fresh tea leaves into the filter. Approximately one ounce is recommended for each
gallon of finished beverage.
4. Level the bed of tea leaves by gently shaking.
5. Slide the funnel into the funnel rails until it stops.
6. Place the ON/OFF switch in the “ON” position.
7. Place the batch selector switch in the desired position.
8. Place the dilution switch in the desired position.
9. Momentarily press the start switch.
CAUTION - The funnel contains hot liquids. Remove funnel slowly.
10. Carefully remove the brew funnel and discard the used filter when tea no longer drips from the funnel tip.
11. Place the ON/OFF switch in the "OFF" position to prevent a false start.
12. Fresh tea is available at the faucet.
Page 6
10777 041500
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
Brew cycle will not start
Probable Cause
1. No water
2. No power or incorrect voltage to
the brewer
3. External Strainer/Flow Control
(.750 GPM)
4. ON/OFF Switch
5. Start Switch
Remedy
Water lines and valves to the brewer
must be open.
Check circuit breakers or fuses.
(A) Direction of flow arrow must be
pointing towards the brewer.
(B) Remove the strainer/flow control and check for obstructions.
Clear or replace.
Refer to
Service
- ON/OFF Switch
for testing. See page 20
Refer to
Service
- Start Switch for
testing procedures. See page 21
Page 7
10777 041500
Page 8
TROUBLESHOOTING (cont.)
PROBLEM
Brew cycle will not start (cont.)
Water is not hot
PROBABLE CAUSE
6. Brew Timer
7. Brew Solenoid Valve
1. Limit Thermostat
CAUTION - Do not eliminate or bypass limit thermostat or thermal
cut-off. Use only BOM replacement
part #29329.1000
2. Control Thermostat
3. Tank Heater
REMEDY
Refer to
Service
- Brew Timer for
testing procedures. See page 15
Refer to
Service
- Brew Solenoid
Valve for testing procedures. See
page 14
Refer to
Service
- Limit Thermostat
for testing procedures. See page 19
Refer to
Service
- Control Thermostat for testing procedures. See
page 16
Refer to
Service
- Tank Heater for
testing procedures. See page 22
Dilution cycle will not start
1. ON/OFF Switch
2. Start Switch
3. Dilution Switch
Refer to
Service
- ON/OFF Switch
for testing procedures. See page 20
Consistently high or low beverage
level in the dispenser
1. Syphon System
2. Lime Build-up
CAUTION - Tank and tank components should be delimed regularly
depending on local water conditions. Excessive mineral build-up
on stainless steel surfaces can initiate corrosive reactions resulting
in serious leaks.
3. Water Pressure
1. External Strainer/Flow Control
(.750 GPM)
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for excessive lime deposits. Delime as
required.
The water pressure to the brewer
must be at least 20 psi(138 kPa).
(A) Direction of flow arrow must be
pointing towards brewer.
(B) Remove the strainer/flow control and check for obstructions.
Clear or replace.
Spitting or excessive steaming
Drip-out time too long
1. Lime Build-up
CAUTION - Tank and tank components should be delimed regularly
depending on local water conditions. Excessive mineral build-up
on stainless steel surfaces can initiate corrosive reactions resulting
in serious leaks.
2. Control Thermostat
1. Funnel Tip
Inspect tank assembly for excessive
lime deposits. Delime as required.
Refer to
Service
- Control Thermostat for testing procedures. See
page 16
The brew funnel should be cleaned
thoroughly before each brew cycle
to lessen the chance of tea leaf particles clogging the drip-out tip.
Page 9
10777 041500
Page 10
TROUBLESHOOTING (cont.)
PROBLEM
Dripping from sprayhead
Water flows into tank continuously (ON/OFF Switch "ON")
PROBABLE CAUSE
1. Syphon System
2. Lime Build-up
CAUTION - Tank and tank components should be delimed regularly
depending on local water conditions. Excessive mineral build-up
on stainless steel surfaces can initiate corrosive reactions resulting
in serious leaks.
3. Brew Solenoid Valve
1. Brew Timer
REMEDY
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for excessive lime deposits. Delime as required.
Refer to
Service
- Brew Solenoid
Valve for testing procedures. See
page 14
Refer to
Service
- Brew Timer for
testing procedures. See page 15
Water flows into tank continuously (ON/OFF Switch "OFF")
Beverage overflows dispenser
Weak beverage
1. Brew Solenoid Valve
1. Dispenser
2. Brew Timer
3. Brew Solenoid Valve
1. Filter Type
2. Tea
Refer to Service - Brew Solenoid
Valve for testing procedures. See
page 14
The dispenser must be completely
empty before starting a brew cycle.
Refer to
Service -
Brew Timer for
testing procedures. See page 15
Remove the Brew Solenoid Valve
and clean any obstruction. Rebuild
or replace the valve if necessary.
See page 14
BUNN® paper filters must be used
for proper extraction.
A sufficient quantity of fresh, loose
tea leaves should be used for proper
extraction.
3. Sprayhead
Page 10
A six-hole stainless steel sprayhead must be used for proper extraction.
10777 041500
Page 11
TROUBLESHOOTING (cont.)
PROBLEM
Weak beverage (cont.)
PROBABLE CAUSE
4. Funnel Loading
5. Water Temperature
6. Low Brew Water Volume
REMEDY
The BUNN® paper filter must be
centered in the funnel and the bed
of tea leaves leveled by gentle shaking.
Place an empty funnel on an empty
dispenser beneath the sprayhead.
Initiate a brew cycle and check the
water temperature immediately below the sprayhead with a thermometer. The reading should not be less
than 200°F. Adjust the control ther-
mostat to increase the water temperature. Replace if necessary.
Adjust needle valve to achieve 76
oz. water from the sprayhead when
the batch size setting is at three
gallons. To increase volume, turn
counter-clockwise. To decrease
volume, turn clockwise.
Dry tea leaves remain in the
funnel
Brewer is making unusal noises
1. Funnel Loading
1. Solenoid(s)
2. Plumbing Lines
3. Water Supply
The BUNN® paper filter must be
centered in the funnel and the bed
of tea leaves leveled by gently shaking.
The nut on the solenoid(s) must be
tight or it will vibrate during operation.
Plumbing lines should not be resting on the counter top.
(A) The brewer must be connected
to a cold water line.
(B) Water pressure to the brewer
must not exceed 90 psi(621 kPa).
Install a regulator if necessary to
lower the working pressure to approximately 50 psi(345 kPa).
4. Tank Heater
Page 11
Remove and clean lime off the tank
heater. See page 22
10777 041500
Page 12
SERVICE
This section provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting
cause of any problem.
WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified
service personnel. The brewer should be disconnected
from the power source when servicing, except when
electrical tests are required and the test procedure specifically states to plug-in the brewer.
COMPONENT ACCESS
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replacement of any component.
All components are accessible by the removal of
the top cover and rear inspection panel.
for assistance in determining the
The top cover is attached with four #6-32 screws.
Removal of the top cover will allow access to ON/OFF
switch, start switch, batch selector switch, dilution
switch, brew timer, control thermostat, limit thermostat and tank heater.
The rear inspection panel is attached with six #832 screws. Removal of the rear panel will allow access
to the brew solenoid, dilution solenoid and terminal
block.
The batch selector switch is located in the front of
the hood, above and to the right of the brew funnel. It
is the second switch from the right.
Testing Procedures:
1. Disconnect the brewer from the power source.
2. Remove the wires from all terminals.
3. Select the 3-gallon setting.
4. Check for continuity between the terminals where
the orange and green wires connect to the switch.
Continuity should be present across these termi-
nals.
5. Select the 5-gallon setting.
6. Check for continuity between the terminals where
the orange and yellow wires connect to the switch.
Continuity should be present.
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. 3 when reconnecting the wires.
YEL to 5-Gal
Timer Dial
ORA to Timer
Board
GRN to 3-Gal
Timer Dial
If continuity is present as described, reconnect the
wires. The switch is operating properly.
If continuity is not present as described, replace the
switch.
P2144
FIG. 3 BATCH SELECTOR SWITCH
TERMINALS
Page 13
Page 14
SERVICE (cont.)
4
2
3
1
MINUTES
MINUT
ES
BUNN-O-MA
TIC
P/N 05791-0006 120 VAC
5
3
6
4
7
5
6
67
8
BREW SOLENOID VALVE
P2146.35
FIG. 4 BREW SOLENOID VALVE
Location:
The brew solenoid is located inside the upper rear
access panel, on the left side of the bracket when
looking at it from the rear of the brewer
.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the white/violet and white/green wires
from the solenoid valve. With the ON/OFF switch
in the "ON" position press the start switch.
3. With a voltmeter, check the voltage across the
white/violet and white/green wires. Connect the
brewer to the power source. The indication must
be:
a) 120 volts ac for 2-wire 120 volt models.
b) 120 volts ac for 3-wire 120/208 and 120/240
volt models.
4. Disconnect the brewer from the power source.
If continuity is present as described, reconnect the
white/violet from the brew timer and white/green wire
from the brew timer.
If continuity is not present as described, replace the
solenoid valve.
6. Check the solenoid valve for coil action. Connect
the brewer to the power source. With ON/OFF
switch in the "ON" position press start switch and
listen carefully in the vicinity of the solenoid valve
for a "clicking" sound as the coil magnet attracts.
7. Disconnect the brewer from the power source.
If the sound is heard as described and water will not
pass through the solenoid valve, there may be a blockage in the water line before the solenoid valve or, the
solenoid valve may require inspection for wear, and
removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Remove all wires from solenoid valve.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the solenoid valve.
4. Remove the two #10-32 slotted-head screws holding the solenoid valve to the bracket.
5. Securely install the new solenoid valve to the
bracket.
6. Securely fasten the water lines to and from the
solenoid valve.
7. Refer to the Fig. 5 when reconnecting the wires.
WHI/GRN to
Brew Timer TL4
WHI/GRN to
Dilution Solenoid
If voltage is present as described, proceed to #5
If voltage is not present as described, refer to
Diagram
and check brewer wiring harness.
Wiring
5. Check for continuity across the solenoid valve coil
terminals.
Page 14
WHI/VIO to
Brew Timer TL1
P1799
FIG. 5 SOLENOID VALVE TERMINALS
10777 041500
Page 15
BUNN-O-MATIC
6
P/N 05791-0006 120 VAC
5
4
3
MINUTES
5
6
4
7
3
8
7
2
1
6
MINUTES
Page 15
Page 16
SERVICE (cont.)
BUNN-O
-MATIC
P/N 05791-0006 120 VAC
BUNN
OFF
HI
BUNN
OFF
HI
CONTROL THERMOSTAT
VAC
5
6
4
7
BUNN-O-MATIC
3
8
6
7
P/N 05791-0006 120
2
5
1
6
4
MINUTES
3
MINUTES
P2143.35
FIG. 8 CONTROL THERMOSTAT
Location:
The control thermostat is located inside hood on
the right side.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Locate the blue/black wire on the control thermostat.
3. With a voltmeter, check the voltage across the blue
wire on the control thermostat and the white or
red wire on the tank heater. Connect the brewer to
the power source. The indication must be:
a) 120 volts ac for 2-wire 120 volt models.
b) 208 volts ac for 3-wire 120/208 volt models.
c) 240 volts ac for 3-wire 120/240 volt models.
4. Disconnect the brewer from the power source.
a) 120 volts ac for 2-wire 120 volt models.
b) 208 volts ac for 3-wire 120/208 volt models.
c) 240 volts ac for 3-wire 120/240 volt models.
8. Disconnect the brewer from the power source.
If voltage is present as described, reinstall the capillary tube into the tank to the line 5.5" above the bulb,
the control thermostat is operating properly.
If voltage is not present as described, replace the thermostat.
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 thermostat to its bracket.
4. Slide the grommet to the line 5.5" above the bulb
on the new capillary tube.
5. Insert the capillary bulb through the hole in the
tank lid and press the grommet firmly and evenly
so that the groove in the grommet fits into the
tank lid.
6. Carefully bend the capillary tube so that the tube
and bulb inside the tank are in a vertical position.
NOTE – The capillary tube must be clear of any electrical termination and not kinked.
7. Fasten the new control thermostat to its bracket.
8. Refer to Fig. 9 when reconnecting the wires.
9. Adjust the control thermostat as required.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the wiring diagrams and check the brewer wiring harness.
5. Locate the black wire on the control thermostat.
6. Gently remove the capillary bulb and grommet
from the tank.
7. With a voltmeter, check the voltage across the
black wire of the control thermostat and the white
or red wire on the tank heater when the control
thermostat is turned fully clockwise. Connect the
brewer to the power source. The indication must
be:
Page 16
BLK to Tank Heater
BLU to Limit Thermostat
P2090.80
FIG. 9 CONTROL THERMOSTAT TERMINALS
10777 041500
Page 17
SERVICE (cont.)
4
2
3
1
MINUTES
MINUTES
B
UNN-O-MATIC
P
/
N
05791-0006 120 VAC
5
3
6
4
7
5
6
67
8
DILUTION SOLENOID VALVE
P2146.35
FIG. 10 DILUTION SOLENOID VALVE
Location:
The dilution solenoid valve is located behind the
upper rear access panel on the right side of the bracket,
when looking at it from the rear of the brewer.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Place Dilution switch in "DILUTION" position.
3. Disconnect the white/blue and white/green wires
from the solenoid valve. With the ON/OFF switch
in the "ON" position press the start switch.
4. With a voltmeter, check the voltage across the
white/blue and white/green wires. Connect the
brewer to the power source. The indication must
be:
a) 120 volts ac for 2-wire 120 volt models.
b) 120 volts ac for 3-wire 120/208 and 120/240
volt models.
4. Disconnect the brewer from the power source.
If continuity is present as described, reconnect the
white/blue wire from the dilution switch and white/
green wire from the brew solenoid terminal.
If continuity is not present as described, replace the
solenoid valve.
6. Check the solenoid valve for coil action. Connect
the brewer to the power source. With ON/OFF
switch in the "ON" position press start switch
and listen carefully in the vicinity of the solenoid
valve for a "clicking" sound as the coil magnet
attracts.
7. Disconnect the brewer from the power source.
If the sound is heard as described and water will not
pass through the solenoid valve, there may be a
blockage in the water line before the solenoid valve
or, the solenoid valve may require inspection for
wear, and removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Remove all wires from solenoid valve.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the
solenoid valve.
4. Remove the two #10-32 slotted-head screws
holding the solenoid valve to the bracket.
5. Securely install the new solenoid valve to the
bracket.
6. Securely fasten the water lines to and from the
solenoid valve.
7. Refer to FIG. 11 when reconnecting the wires.
WHI/BLU to
Dilution Switch
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to
Wiring Diagram
and check brewer wiring harness.
5. Check for continuity across the solenoid valve
coil terminals.
WHI/GRN to
Brew Solenoid
Valve
P1799
FIG. 11 SOLENOID VALVE TERMINALS
Page 17
Page 18
SERVICE (cont.)
DILUTION SWITCH
P2131.40
FIG. 12 DILUTION SWITCH
Location:
The dilution switch is located in the front of the
hood, above and to the left of the brew funnel, and
right of the ON/OFF switch. It is the second switch
from the left
5. Set Dilution switch to "NO DILUTION".
6. Check for continuity between the terminals where
the white/blue and white/violet connect to the
switch. Continuity should not be present.
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. 13 when reconnecting the wires.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Remove the wires from all terminals.
3. Set Dilution switch to "DILUTION".
4. Check for continuity between the terminals where
the white/blue and white/violet wires connect to
the switch. Continuity should be present.
If continuity is present as described, reconnect the
wires. The switch is operating properly.
If continuity is not present as described, replace the
switch.
WHI/BLU to Dilution
Solenoid Valve
WHI/VIO to ON/OFF
Switch
P2144
FIG. 13 DILUTION SWITCH
TERMINALS
Page 18
Page 19
SERVICE (cont.)
MINUT
ES
P/N 05791-0006 120 VAC
LIMIT THERMOSTAT
FIG. 14 LIMIT THERMOSTAT
BUNN-O-MATIC
P/N 05791-0006 120 VAC
5
4
3
MINUTES
white or red wire on the tank heater terminal. Connect the brewer to the power source. The indication must be:
a) 120 volts ac for 2-wire 120 volt models.
b) 208 volts ac for 3-wire 120/208 volt models.
c) 240 volts ac for 3-wire 120/240 volt models.
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
5
6
4
7
3
8
6
7
2
1
6
MINUTES
operating properly.
If voltage is not present as described, replace the limit
thermostat.
Removal and Replacement
1. Remove both wires from the limit thermostat terminals.
2. Carefully slide the limit thermostat out from under the retaining clip.
3. Carefully slide the new limit thermostat into the
retaining clip.
P2143.35
4. Refer to Fig. 15 when reconnecting the wires.
Location:
The limit thermostat is located inside the hood on the
tank lid.
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 indication must be:
a) 120 volts ac for 2-wire 120 volt models.
b) 208 volts ac for 3-wire 120/208 volt models.
c) 240 volts ac for 3-wire 120/240 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the black
wire and proceed to #4.
If voltage is not present as described, refer to the Wiring Diagrams and check the wiring harness.
BLU to
Control
Thermostat
BLK to Terminal Block
P1800
FIG. 15 LIMIT THERMOSTAT TERMINALS
4. Remove the blue wire from the limit thermostat.
5. With a voltmeter, check the voltage across the exposed terminal of the limit thermostat and the
Page 19
10777 041500
Page 20
SERVICE (cont.)
ON/OFF SWITCH
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 wiring harness.
6. Check for continuity across the center and end
terminals of the bottom row when the switch is in
the “ON” position.
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. 17 when reconnecting the wires.
FIG. 16 ON/OFF SWITCH
P2131.40
Location:
The ON/OFF 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 and white/violet wires from the
switch terminals.
3. With a voltmeter, check the voltage across the
black wire removed from the ON/OFF switch and
the white wire on the switch terminal.
4. Connect the brewer to the power source.The indication must be:
a) 120 volts ac for 2-wire 120 volt models.
b) 120 volts ac for 3-wire 120/208 and 120/240
volt models.
WHI to Timer
Board TL2
BLK to Terminal
Block
WHI/VIO to
Dilution Switch
WHI/VIO to
Timer Board TL1
P1590
FIG.17 ON/OFF SWITCH TERMINALS
Page 20
10777 041500
Page 21
SERVICE (cont.)
START SWITCH
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. 19 when reconnecting the wires.
FIG. 18 START SWITCH
P2131.40
Location:
The start switch is located in the front of the hood,
above and to the right of the brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the wires from all 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.
WHI/YEL to Timer
Board TL5
WHI/ORA to Timer
Board TL3
P2091
FIG. 19 START SWITCH TERMINALS
Page 21
10777 041500
Page 22
SERVICE (cont.)
BUNN-O-MATIC
TANK HEATER
5
6
4
7
BUNN-O-MATIC
3
8
6
7
P/N 05791-0006 120 VAC
2
5
1
6
4
MINUTES
3
MINUTES
P2143.35
FIG. 20 TANK HEATER
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 or red wires. Connect the brewer
to the power source. The indication must be:
a) 120 volts ac for 2-wire 120 volt models.
b) 208 volts ac for 3-wire 120/208 volt models.
c) 240 volts ac for 3-wire 120/240 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4
If voltage is not present as described, refer to the
Wiring Diagram
and check wiring harness.
4. Disconnect the black wire and the white or red
wire from the tank heater terminals.
5. Check for continuity across the tank heater terminals.
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.
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 reassembly.
3. Disconnect vent tube and water inlet tube.
4. Remove the eight #8 keps nuts securing the tank
lid to the tank.
5. Remove the tank lid with limit thermostat, sprayhead tube, tank heater and vent tube.
6. Remove the two hex nuts securing the tank heater
to the tank lid. Remove tank heater with gaskets
and discard.
7. Install new tank heater with gaskets on the tank
lid and secure with two hex nuts.
8. Install tank lid with limit thermostat, sprayhead
tube, tank heater and vent tube using eight #8 keps
nuts.
9. Secure sprayhead tube to hood using a hex nut.
10. Install sprayhead.
11. Connect vent tube and water inlet tube to fitting.
12. Reconnect the wires to the limit thermostat and
tank heater. See limit thermostat section in this
manual when reconnecting wires.
13. Refer to Fig. 21 when reconnecting the tank heater
wires.
BLK to Control
Thermostat
WHI to Terminal
Block (120V)
RED to Terminal
Block (208&240V)
Page 22
FIG. 21 TANK HEATER TERMINALS
10777 041500
P1284.80
Page 23
Page 23
10777 041500
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