Bunn T6, T3A, T6A, T3 User Manual
BUNN
®
T3,T3A
T6,T6A
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
TELEPHONE: (217) 529-6601 FAX: (217) 529-6644
10145.0000G 7/00 © 1984 Bunn-O-Matic Corporation
CONTENTS
Introduction ............................................................................. 2
Warranty .................................................................................. 2
User Notices............................................................................. 3
Electrical Requirements ........................................................... 4
Plumbing Requirements........................................................... 4
Initial Set-Up ............................................................................ 5
Adjusting Brew Volumes .......................................................... 6
Operating Controls ................................................................... 6
Cleaning ................................................................................... 7
Tea Brewing.............................................................................. 7
Troubleshooting ....................................................................... 8
Service ................................................................................... 14
Wiring Diagrams .................................................................... 28
INTRODUCTION
The T3 will brew a three-gallon batch of fresh tea into a reservoir, the T6 will brew a three-gallon batch into
either the right or left reservoir. 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.
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 material
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.
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10145 072600
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.
#00831.0000
#00656.0000
#03408.0000
#03409.0000
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ELECTRICAL REQUIREMENTS
CAUTION - The brewer must be disconnected from the power source until specified in
120V model brewers require 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.
"A" model brewers require 2-wire, grounded service rated 240 volts ac, 10 amp, single phase, 50 Hz.
"B" model brewers require 2-wire, grounded service rated 100 volts ac, 15 amp, single phase, 60 Hz.
Proceed as follows:
Electrical Hook-Up
CAUTION – Improper electrical installation will damage electronic components.
1. An electrician must provide electrical service as specified.
2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.
3. Remove top cover from the brewer.
4. Rotate the control thermostat knob fully counterclockwise to the "OFF" position and replace the top cover.
5. Connect the brewer to the power source.
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.
Initial Set-Up.
PLUMBING REQUIREMENTS
These brewers must be connected to a cold water system with operating pressure between 20 (138) and 90
psi (620 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 (620 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. Remove the shipping cap from the bulkhead fitting on the bottom 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 at the rear of the brewer.
3. Flush the water line and securely attach it to the flare fitting on the strainer/flow control.
4. Turn on the water supply.
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INITIAL SET-UP (FILL & HEAT)
CAUTION - The brewer must be disconnected from the power source throughout the
when specified in the instructions.
1. Complete the electrical and plumbing instructions prior to starting this procedure.
2. Remove the top panel and check that the thermostat dial is rotated fully counterclockwise to the “OFF”
position.
3. Set the delay dial at eight minutes. Replace top panel. Plug in brewer.
4. Remove the filter screen and metal ferrule from the funnel to speed this procedure. Insert the funnel into the
funnel rail and push it until it stops. Rotate the funnel handle to the left or right (T6) to align the funnel
discharge over the hole in the reservoir cover. (Model T3 funnel does not rotate.)
5. Turn the ON/OFF switch (T3) to “ON” or SELECTOR switch (T6) to the “LEFT” or “RIGHT” and momentarily
depress the start switch. Water will immediately start flowing into the water tank and will automatically shut
off at the end of three minutes. Depress the start switch again. During the second period the tank will fill to
its capacity and the excess will flow from the sprayhead and out of the funnel.
6. Wait until the flow stops then turn the ON/OFF or SELECTOR switch to the “OFF” position.
7. Rotate the thermostat fully clockwise, (“ON”) and wait for the water tank to stabilize at its proper temperature. During this period some water will come out of the funnel due to expansion, this will not occur thereafter.
8. Turn the ON/OFF switch (T3) to “ON” or SELECTOR switch (T6) to the “LEFT” or “RIGHT” and depress the
start switch to cycle the control thermostat.
9. Wait until the flow stops then turn the ON/OFF or SELECTOR switch to the “OFF” position.
10. The brewer is now ready for initial timer adjustment.
Initial Set-Up
, except
INITIAL TIMER ADJUSTMENT
1. Complete the initial fill and heat instructions prior to starting this procedure.
2. With the filter screen and metal ferrule removed from the funnel, water will flow quickly from the funnel and
speed this procedure. Insert the funnel into the funnel rails and push it until it stops. Rotate the funnel handle
to the left or right (T6) to align the funnel discharge over the hole in the reservoir cover. (Model T3 funnel
does not rotate.)
3. Check the delay dial is at eight minutes and the dilution dial is at three minutes and forty-five seconds.
4. Empty the tea reservoir of any water that may have accumulated.
5. Turn the ON/OFF switch to “ON” (T3), or the SELECTOR switch to “LEFT” or “RIGHT”, (T6), and momentarily
depress the start switch. After a few seconds water should flow from the funnel into the reservoir. Allow this
to continue until it stops and immediately turn the ON/OFF or SELECTOR switch to “OFF”.
6. Measure the water collected in the reservoir. It should equal seventy-six ounces. If it is less or more than this
amount, adjust the brew timer accordingly (See
get the proper amount.
7. Rotate the delay dial fully counterclockwise to speed this next procedure. Drain the reservoir.
8. Momentarily depress the start switch and allow both the concentrate and dilution cycles to occur. When all
water stops flowing, the level in the reservoir should be in the middle of the two lower stud heads that hold
the dilution water nozzle in place. If it is not correct, rotate the dilution dial up or down accordingly and repeat
this step until the proper level is achieved.
9. Return the delay dial to eight minutes.
Adjusting Brew Volumes
) and repeat Steps 5 and 6 until you
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10145 072600
INITIAL TIMER ADJUSTMENT (cont.)
®
10. Install the ferrule and screen in the funnel. Load the funnel with a BUNN
paper filter and approximately four
ounces of loose tea leaves. Depress the start button to brew tea and observe the funnel drip out and the
dilution streams near the end of the cycle. The dilution stream should stop approximately thirty seconds after
the drip out has stopped.
11. If this does not happen, load the funnel with a fresh filter and tea, rotate the delay dial up or down accordingly
and repeat Step 10 until proper timing is achieved.
12. Replace the top panel. The brewer is now ready for normal operation.
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 remembers 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 programming to be done until switch is once again placed in the “SET” position.
OPERATING CONTROLS
A. ON/OFF SWITCH (T3 ONLY)
ON - Placing the switch in the"ON" (left) position allows the start switch to activate a timed brew cycle for three
gallons of tea.
OFF - Placing the switch in the "OFF" (right) position stops the brew cycle. Stopping a brew cycle after it has been
started will not stop the flow of water into the funnel until the tank syphons down to its proper level. The switch
should always be placed in this position after a brew cycle and whenever the brewer is unattended.
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OPERATING CONTROLS (cont.)
B. SELECTOR SWITCH (T6 ONLY)
Placing the selector switch in the "ON" (left or right) position allows the start switch to activate a timed brew cycle
for three gallons of tea. It also selects into which reservoir dilution water will be introduced. This switch should
always be in the "OFF" (center) position after a brew cycle or when the brewer is unattended.
C. START SWITCH
Starts a brew cycle when the ON/OFF or SELECTOR 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. Place the ON/OFF or SELECTOR switch in the "OFF” position. 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 two inches 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. Twist the faucet shank nut in a clockwise direction and remove the faucet from the brewer.
5. Thoroughly clean the entire inside surface of the reservoir, the surfaces behind the reservoir rim, and the
faucet with a brush using a mild detergent and water solution. Rinse the reservoir and shank in warm water,
6. Disassemble the faucet. The faucet cleaning procedure requires a three compartment sink. Thoroughly wash
all faucet parts in a mild detergent and water solution in the first sink. Rinse the parts in hot water in the
second sink. Sanitize the parts for one minute in 75
sink. Reassemble the faucet and attach it to the brewer.
7. Sanitize all exposed surfaces of the reservoir with a 75o warm chlorine solution (at least 100 ppm). Empty the
reservoir, insert the brew funnel and thoroughly rinse everything by running two complete brew cycles,
empty the reservoir after each brew cycle.
8. Wash the entire outside surface of the brewer with a clean damp cloth.
o
warm chlorine solution (at least 50 ppm) in the third
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 reservoir(s).
2. Insert a BUNN® filter into the funnel.
3. Pour the packet of loose fresh tea leaves into the filter. Approximately four ounces is recommended.
4. Level the bed of tea leaves by gently shaking.
5. Slide the funnel into the funnel rails until it stops. On T6 brewers, fully rotate the funnel handle to the left or
right to align the funnel discharge over the selected reservoir.
6. Place the ON/OFF or SELECTOR switch in the “ON” position.
7. Momentarily press the start switch.
CAUTION - The funnel contains hot liquids. Remove funnel slowly.
8. Carefully remove the brew funnel and discard the used filter when tea no longer drips from the funnel tip.
9. Place the ON/OFF or SELECTOR switch in the "OFF" position to prevent a false start.
10. Fresh tea is available at the faucet.
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10145 072600
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. (A) ON/OFF Switch (T3)
(B) Selector Switch (T6)
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 24
Refer to
Service
- Selector Switch
for testing. See page 24
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10145 072600
TROUBLESHOOTING (cont.)
PROBLEM
Brew cycle will not start (cont.)
Water is not hot
PROBABLE CAUSE
5. Start Switch
6. Brew Timer
7. Brew Solenoid Valve
8. Internal Flow control (.195 GPM)
1. Limit Thermostat
CAUTION - Do not eliminate or bypass limit thermostat or thermal
cut-off. Use only BOM replacement
part #29329.1000
REMEDY
Refer to
Service
- Start Switch for
testing procedures. See page 26
Refer to
Service
- Brew Timer for
testing procedures. See page 17 or
18
Refer to
Service
- Brew Solenoid
Valve for testing procedures. See
page 15
(A) Direction of flow arrow must be
pointing towards brewer.
(B) Remove the flow control and
check for obstructions. Clear or replace.
Refer to
Service
- Limit Thermostat
for testing procedures. See page 23
Dilution cycle will not start
2. Control Thermostat
3. Tank Heater
1. (A) ON/OFF Switch (T3)
(B) Selector Switch (T6)
2. Start Switch
3. Dilution Timer
Refer to
Service
- Control Thermostat for testing procedures. See
page 20
Refer to
Service
- Tank Heater for
testing procedures. See page 27
Refer to
Service
- ON/OFF Switch
for testing procedures. See page 24
Refer to
Service
- Selector Switch
for testing procedures. See page 24
Refer to
Service
- Start Switch for
testing procedures. See page 26
Refer to
Service
- Dilution Timer for
testing procedures. See page 22
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10145 072600
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