Bunn 10690 Coffeemaker User Manual

C, CT, CWTF Series
Including DV, APS/TC/TS,
Single CW & Twins
Supercedes Operating Manuals:
10690.####; 10737.####; 10841.0000;
28182.0000; 36102.0000
INSTALLATION & OPERATING GUIDE
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts
Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at
www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and
manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
41721.0000C 05/12 ©2008 Bunn-O-Matic Corporation
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers
and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor.
2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labor for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts
and labor for 4 years or 40,000 pounds of coffee, whichever comes first.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be
commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the
applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured
by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation,
improper maintenance or repair, non periodic cleaning and descaling, equipment failures related to poor water quality,
damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but
not limited to user replaceable parts such as seals and gaskets. This warranty is conditioned on the Buyer 1) giving BUNN
prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office
Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an
authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under
warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make
modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such
individuals, whether oral or written, do not constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the
applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair
is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for
the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS
EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION
AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of
use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities
or services, or any other special, incidental or consequential damages.
392, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN
Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic,
Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design, Cool Froth, DBC, Dr. Brew stylized Dr. design,
Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment Worldwide, Respect Earth, Respect Earth with
the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com, Scale-Pro, Silver Series, Single, Smart Funnel,
Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in Beverage Equipment Worldwide, ThermoFresh,
Titan, trifecta, Velocity Brew, A Partner You Can Count On, Air Brew, Air Infusion, Beverage Bar Creator, Beverage Profit
Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer
Control, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Tea At Its Best, The Horizontal Red Line, Ultra are
either trademarks or registered trademarks of Bunn-O-Matic Corporation.
Page 2
41721 030912
INTRODUCTION
This equipment will brew one or two half-gallon batches of coffee simultaneously into awaiting dispensers
(with just the press of a button). One side may include a hot water faucet for allied beverage use. It is only for
indoor use on a sturdy counter.
USER NOTICES ............................................................................................................................................ 4
ELECTRICAL REQUIREMENTS.......................................................................................................................5
PLUMBING REQUIREMENTS (CURRENT SINGLES)......................................................................................6
PLUMBING REQUIREMENTS (CURRENT TWINS).........................................................................................7
PLUMBING REQUIREMENTS (EARLY SINGLES)...........................................................................................8
PLUMBING REQUIREMENTS (EARLY TWINS)...............................................................................................9
INITIAL SET-UP...........................................................................................................................................10
ADJUSTING BREW VOLUMES ................................................................................................................... 11
OPERATING CONTROLS ............................................................................................................................ 12
BREWING ................................................................................................................................................... 14
CLEANING .................................................................................................................................................. 15
TROUBLESHOOTING ................................................................................................................................. 12
Explanation of codes:
15 - All components in machine are rated for 120 Volts ac, (15 Amps)
20 - All components in machine are rated for 120 Volts ac, (20 Amps)
35 (120/240V) - Tank heater rated for 240 volts ac, all other components rated for 120 volts ac (20 Amps)
DV - Dual Voltage. 2 tank heaters with toggle switch
MV - Multi Voltage. 2 tank heaters with terminal block. (Replaced by DV)
A - All components in machine are rated for 240 volts ac.
B - All components are rated for either 100 volts ac, or 200 volts ac.
C - Canadian models only
CE - European models only.
TWIN - 2 brewers in 1 chassis.
APS - Airpot Server (No warmers)
TC - Thermal Carafe (No warmers)
TS - Thermal Server (No warmers)
Page 3
41721 111308
USER NOTICES
Carefully read and follow all notices in this manual and on the equipment. All labels on the equipment should be kept in
good condition. Replace any unreadable or damaged labels.
As directed in the International Plumbing Code of the
International Code Council and the Food Code
Manual of the Food and Drug Administration (FDA),
this equipment must be installed with adequate
backflow prevention to comply with federal, state
and local codes. For models installed outside the
U.S.A., you must comply with the applicable Plumbing /Sanitation Code for your area.
! WARNING
Fill water tank before turning - on thermostat or connecting appliance
to power source.
Use only on a properly protected
circuit capable of the rated load.
Electrically ground the chassis.
Follow national/local electrical codes.
Do not use near combustibles.
#00656.0001
FAILURE TO COMPLY RISKS EQUIPMENT
DAMAGE, FIRE, OR SHOCK HAZARD
READ THE ENTIRE OPERATING MANUAL
BEFORE BUYING OR USING THIS PRODUCT
#00658.0000
THIS APPLIANCE IS HEATED WHENEVER
CONNECTED TO A POWER SOURCE
00831.0000F 3/98 ©1998 BUNN-O-MATIC CORPORATION
#00831.0000
#03408.0002
CAUTION
#02765.0000
#37881.0000
34955.0000D
#00824.0002
120/208-240 V, 12.25-13.9 A, 2440-3200 W
1PH, 3-Wire + GND, 60HZ
#34955.0001
ONE WARMER MODELS
Optional Field Wiring
Optional Field Wiring
120/208-240 V, 13.0-14.8 A, 2540-3300 W
1PH, 3-Wire + GND, 60HZ
34955.0002D
#34955.0000
APS MODELS
120/208-240 V, 13.9-15.6 A, 2640-3400 W
1PH, 3-Wire + GND, 60HZ
#34955.0002
TWO WARMER BREWERS
34955.0001D
Optional Field Wiring
Optional Field Wiring
120/208-240 V, 11.4-13.1 A, 2340-3100 W
1PH, 3-Wire + GND, 60HZ
WA R M E R S A N D S U R FAC E S A R E H OT
34955.0003D
#03409.0002
To reduce the risk of electric shock,
do not remove or open cover.
No user-serviceable parts inside.
Authorized service personnel only.
Disconnect power before servicing.
#34955.0003
THREE WARMER BREWERS
120V
120/208-240V
#34056.0000
VOLTAGE SELECTOR SWITCH
#12364.0000
Page 4
41721 052412
ELECTRICAL REQUIREMENTS
CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.
Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.
BLK
WHI
RED
L1
N
120V. A.C.
WHI
BLK
L2
N
BLU
120V. A.C.
208 or 240V. A.C.
120V. A.C.
RED
BLK
L1
BLK
L3
L2
230V. A.C.
230V. A.C.
230V. A.C.
RED
L1
200 or 230V. A.C.
L2
L1
P3516
Earth Ground
Chassis Ground
P1841
Earth Ground
Model 20
Requires 2-wire, grounded service rated 120 volts
ac, 20 amp, single phase,
60 Hz. Proceed as follows:
Earth Ground
Chassis Ground
Model 35
Note: This electrical service
consists of 3 current carrying
conductors (Neutral, L1 and
L2) and a separate conductor
for earth ground.
P1843
Chassis Ground
Earth Ground
P1842
Chassis Ground
230V ac
3 phase models
200 or 230V ac
single phase models
Note: This electrical service
consists of 3 current carrying conductors (L1, L2 and
L3) and a separate conductor for earth ground.
Note: This electrical service
consists of 2 current carrying conductors (L1 and L2)
and a separate conductor
for earth ground.
P1842
NOTE: Some Twins require two individual power cords.
CE REQUIREMENTS:
• This appliance must be installed in locations where it can be overseen by trained personnel.
• For proper operation, this appliance must be installed where the temperature is between 5°C to 35°C.
• Appliance shall not be tilted more than 10° for safe operation.
• An electrician must provide electrical service as specified in conformance with all local and national codes.
• This appliance must not be cleaned by water jet.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given instructions concerning use of this appliance by
a person responsible for its safety.
• Children should be supervised to ensure they do not play with the appliance.
• If the power cord is ever damaged, it must be replaced by the manufacturer or authorized service personnel with a special
cord available from the manufacturer or its authorized service personnel in order to avoid a hazard.
• Machine must not be immersed for cleaning..
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. Place the heater switche(s) at the rear of the brewer in the "OFF"
lower position.
4. Remove the front panel beneath the sprayheads. (On Dual Volt
models, place the voltage select toggle switch to the corresponding voltage position being used. FIG 5-1).
5. Feed the cord through the strain relief(s) and connect it to the
terminal block(s).
6. Connect the brewer to the power source and verify the voltage at
the terminal block before proceeding. Replace the front panel.
7. 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.
FIG. 5-1 Dual Volt Switch Position
Page 5
41721 080310
PLUMBING REQUIREMENTS-CURRENT SINGLES
As directed in the International Plumbing Code of the International Code Council and the Food Code Manual
of the Food and Drug Administration (FDA), this equipment must be installed with adequate backflow prevention to comply with federal, state and local codes. For models installed outside the U.S.A., you must
comply with the applicable Plumbing /Sanitation Code for your area.
MODEL C:
This model is completely portable and requires no attached plumbing.
MODELS CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB, SINGLE CW & SINGLE CWF
These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi
(138 to 620kPa) 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 (620kPa)to reduce it to 50 psi (345kPa). 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 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.
FIG 6-1
FIG 6-2
Models CTF & CWTF
Models CT & CWT
Page 6
41721 080310
PLUMBING REQUIREMENTS-CURRENT TWINS
TWINS
These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi
(138 and 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 3⁄8" flare.
1.
Remove six screws securing rear utility cover (if
equipped). FIG 7-1
2. Remove cap from the flared fitting on the bottom
of the center tube assembly.
3. Flush the water line and securely attach it to the
flare fitting on the center tube assembly. FIG
7-2
4. Turn on the water supply.
5. Re-install rear utility cover. FIG 7-3
6. On models with faucet, place an empty vessel
beneath the faucet and lift the handle until water
is dispensed.
FIG 7-1
FIG 7-2
FIG 7-3
Page 7
41721 111308
PLUMBING REQUIREMENTS-EARLY SINGLES
As directed in the International Plumbing Code of the International Code Council and the Food Code Manual
of the Food and Drug Administration (FDA), this equipment must be installed with adequate backflow prevention to comply with federal, state and local codes. For models installed outside the U.S.A., you must
comply with the applicable Plumbing /Sanitation Code for your area.
MODEL C:
This model is completely portable and requires no attached plumbing.
MODELS CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB, SINGLE CW & SINGLE CWF
These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi
(138 to 620kPa) 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 (620kPa)to reduce it to 50 psi (345kPa). 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 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.
FIG 8-1
FIG 8-2
Models CTF & CWTF
Models CT & CWT
Page 8
41721 080310
PLUMBING REQUIREMENTS-EARLY TWINS
TWINS
These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi
(138 and 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 3⁄8" flare.
TWINS
1.
Remove six screws securing rear utility cover (if
equipped). FIG 9-1
2. Remove cap from the flared fitting on the bottom
of the center tube assembly.
3. Flush the water line and securely attach it to the
flare fitting on the center tube assembly. FIG
9-2
4. Turn on the water supply.
5. Re-install rear utility cover. FIG 9-3
6. On models with faucet, place an empty vessel
beneath the faucet and lift the handle until water
is dispensed.
FIG 9-2
P1241
Page 9
FIG 9-1
P1241
FIG 9-3
P1241
41721 111308
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.
2.
3.
Insert an empty funnel into the funnel rails.
Place an empty dispenser under the funnel.
Place the heater switch at the rear of the brewer in the “OFF” lower position and connect the brewer to the
power source.
4. Fill the tank with water as directed:
4A. Model C
Pour three pitchers of tap water into the screened area on top of the brewer. Allow approximately two
minutes between pitchers for water to flow into the tank. While the third pitcher of water is entering the
tank, the tank will fill to capacity and the excess will flow from the sprayhead, out of the funnel, and into the
dispenser.
4B. Models CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF
Connect the brewer to the power source, place the "ON/OFF" switch in the "ON" upper position, and momentarily press and release the start switch. Water will begin flowing into the tank. When water stops flowing
into the tank, initiate a second and a third brew cycle. During the third brew cycle the tank will fill to its
capacity and the excess will flow from the sprayhead, out of the funnel, and into the dispenser.
5. When the flow of water from the funnel stops, place the heater switch at the rear of the brewer in the “ON”
upper position and wait approximately twenty minutes for the water in the tank to heat to the proper temperature. Some water will drip from the funnel during this time; this is due to expansion and should not
occur thereafter.
6. Empty the dispenser and initiate another brew cycle as directed:
6A. Model C
Pour one pitcher of tap water into the screened area on top of the brewer.
6B. Models CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF
Place the "ON/OFF" switch in the "ON" upper position, and on models SINGLE CW and SINGLE CWF place
the batch selector switch in the "1 GAL" position. Momentarily press and release the start switch.
7. Place the "ON/OFF" switch in the lower “OFF” position after water has stopped flowing from the funnel, and
let the water in the tank reheat to the proper temperature.
8. Empty the dispenser; place the "ON/OFF" switch in the "ON" upper position, and momentarily press and
release the start switch. Check the water volume in the dispenser after water has stopped flowing from the
funnel. It should be 64 ounces for all models except SINGLE CW and SINGLE CWF should be 128 ounces.
9. Models SINGLE CW and SINGLE CWF only, place the batch selector switch in the "1/2 GAL" position, and
momentarily press and release the start switch. Check the water volume in the dispenser after water has
stopped flowing from the funnel. It should be 64 ounces.
10. If water volumes are not correct, adjust the brew timer as required. See Adjusting Brew Volumes. Allow
the water to reheat. Start, and measure another brew cycle.
11. Repeat step 10 until correct water volume is achieved.
NOTE: For all Twins, repeat steps 1 through 10 for the other side.
12.The brewer is now ready for use in accordance with the coffee brewing instructions.
ADJUSTING BREW VOLUMES
NOTE: Check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server or
decanter are in place, prior to setting or modifying batch sizes.
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. If the brewer has a batch selector switch, position it to the size to be changed.
0 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
Page 10
41721 080310
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 (this will take
approximately ten seconds), 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”. The
brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure
is repeated. Empty server(s), turn selector switch to positions that have yet to be set, and repeat batch setting
procedure until all batch sizes are set.
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.
NOTE: If the clicks can not be heard, lightly grip the incoming water line to feel when the valve cycles on
and off.
THERMOSTAT
In most locations the thermostat should be turned to the full clockwise postion (200° F) for optimum brewing
temperature. In areas of high altitude you may have to turn it down (counterclockwise) to prevent boiling.
NOTICE
Brew water temperature is factory set at 200° F (93.3° C)
Areas of high altitude will require lowering this temperature to prevent boiling. This chart should be used as a
guide when readjusting the brew water temperature.
(Feet)
Boiling point
of water
°F
°C
-1000
-500
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
213.8
212.9
212.0
211.1
210.2
209.3
208.4
207.4
206.5
205.6
204.7
203.8
202.9
201.9
201.0
200.1
199.2
198.3
197.4
196.5
195.5
194.6
193.7
Altitude
DUAL VOLT SWITCH
SET
THERMOSTAT KNOB
LOCK
SET/LOCK SWITCH
FIG 11-1
Page 11
101.0
100.5
100.0
99.5
99.0
98.5
98.0
97.4
96.9
96.4
95.9
95.4
94.9
94.4
93.9
93.4
92.9
92.4
91.9
91.4
90.8
90.3
89.8
35665.0000A 05/04 © 2004 Bunn-O-Matic Corporation
Recommended
water temperature
°F
°C
200
200
200
200
200
200
200
200
199
198
197
196
195
195
194
193
192
191
190
189
188
187
186
93.3
93.3
93.3
93.3
93.3
93.3
93.3
93.3
92.8
92.2
91.7
91.1
90.6
90.6
90.0
89.4
88.9
88.3
87.8
87.2
86.7
86.1
85.6
41721 080310
OPERATING CONTROLS
ON/LOWER SWITCH
Placing the "ON/LOWER" switch in the "OFF" (lower) position stops brewing. Stopping a brew cycle after it
has been started, will not stop the flow of water into the funnel until the tank siphons down to its proper level.
Placing the switch in the "ON" (upper) position enables the brew circuit and on all (except APS/TC models) supplies power to the brew station warmer.
START SWITCH
Momentarily pressing and releasing the switch starts a brew cycle. DO NOT HOLD START SWITCH.
NOTE – The "ON/OFF" switch must be in the "ON" upper position to initiate and complete a brew cycle.
NOTE – Some TWINS are equiped with auxiliary brew start switches on each side of brewer. Use care not to
place other items too close to start switches so they don't block or accidently start a brew cycle! FIG 11-1
FLIP LID (POUR IN FEATURE)
Place server under brew funnel. Open flip lid to pour in (water only). DO NOT POUR IN COFFEE!
WARNING: DO NOT USE THE POUR IN FEATURE AND START SWITCH SIMULTANEOUSLY, OVER FLOWING
OF HOT WATER WILL OCCUR!
FLIP LID (POUR IN FEATURE)
HOT WATER FAUCET
WARMER SWITCHES
ON/LOWER SWITCH
BREW START SWITCH
BREW FUNNEL
AUXILIARY BREW START SWITCH
BREW STATION WARMER
FIGURE 12-1
FIGURE 12-2
Page 12
41721 111308
OPERATING CONTROLS
MASTER ON/OFF SWITCH(S)
The master ON/OFF switch disables power the entire brewer (including tank heaters).
NOTE – TWINS with 2 power cords will have 2 power switches, (one left, one right).
TANK HEATER ON/OFF SWITCH(S)
The tank heater ON/OFF switch disables power to the tank heater circuits only. Power to brew timer and warmer circuits are not affected. All Twins have 2 tank heater switches. NOTE: Leaving the tank heater switch(s) off
will result in brewing with cold water.
LATE MODEL SWITCHS
FIGURE 13-1
FIGURE 13-2
EARLY MODEL SWITCHS
FIGURE 13-3
FIGURE 13-4
Page 13
41721 111308
COFFEE BREWING
1.
2.
3.
4.
5.
6.
Insert a BUNN® filter into the funnel.
Pour the fresh coffee into the filter and level the bed of grounds by gently shaking.
Slide the funnel into the funnel rails.
Place an empty dispenser beneath the funnel.
Place the "ON/OFF" switch in the "ON" upper position. Momentarily press and release the start switch.
When brewing is completed, simply discard the grounds and filter.
HOT WATER FAUCET
The hot water faucet may be used to dispense a cup of hot water at any time. Not intended for filling carafes,
pitchers, etc. Attempting to dispense more than 8-10 ounces will result in cool water. NOTE – Faucet will not
work with the pour in feature, brewer must be plumbed to a working water supply line.
Page 14
41721 111308
CLEANING
1. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all
surfaces on Bunn-O-Matic equipment. Use care when cleaning around the heater switch with a cloth, so as
not to accidentally turn off the tank heater!
2. Clean out the sprayhead holes. A properly cleaned sprayhead will leave a dimple in the bed of coffee grounds
for each hole. Example: 6 holes = 6 dimples. FIG 15-1/2
3. With the sprayhead removed, insert the deliming spring (provided) all the way into the sprayhead tube. When
inserted properly, no more than two inches of spring should be visible. Saw back and forth five or six times.
FIG 15-3. NOTE – In hard water areas, this may need to be done daily. It will help prevent liming problems
in the brewer and takes less than a minute.
4. The faucet aerator may be removed for cleaning. Unscrew aerator assembly (counterclockwise from bottom)
FIG 15-5
WARNING: DO NOT ATTEMPT TO DISASSEMBLE REMAINDER OF FAUCET ASSEMBLY UNTIL
BREWER IS DISCONECTED FROM WATER LINE.
FIG 15-3
Clean Sprayhead Holes
FIG 15-1
FIG 15-2
Normal pattern
FIG 15-4
Plugged Sprayhead Hole
Deliming
Spring
FIG 15-5
Twist deliming spring while pushing in
Aerator disassembly
Page 15
41721 111308
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 personnel.
• 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 will not start
1. ON/LOWER Switch is off.
Turn on switch.
2. No power
(A) Turn on main power switch.
(B) Check that the power cord is
securely plugged into outlet.
(C) Check circuit breakers or
fuses.
3. No water
(A) Water lines and valves to the
brewer must be open.
(B) Check for plugged water filter
Water is not hot
1. Heater switch turned off.
Turn on switch
Inconsistent beverage level
1. Lime Build-up
(A) Use deliming spring.
(B) Clean sprayhead. (Page 11)
2. Water Pressure fluctuating.
Have a pressure regulator Installed.
1. Timer adjustment.
Adjust timer (Page 10)
Consistently low or high beverage level.
Page 16
41721 111308
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Spitting or excessive steaming
1. Lime Build-up
(A) Use deliming spring.
(B) Clean sprayhead. (Page 11)
Dripping from sprayhead
1. Syphon System
The brewer must be level or
slightly lower in front to syphon
properly.
Brew cycle starts when ON/
LOWER Switch is turned on.
Auxiliary brew start switch on
TWINS inadvertently activated.
Move objects away from brewer.
Weak beverage
1. Filter Type
BUNN® paper filters must be used
for proper extraction.
2. Coffee Grind
A fine or drip grind must be used
for proper extraction.
3. Sprayhead
A clean spray-head must be used
for proper extraction.
4. Funnel Loading
The BUNN® paper filter must be
centered in the funnel and the
bed of ground leveled by gentle
shaking.
5. Water Temperature
Place an empty funnel on an empty
dispenser beneath the sprayhead.
Initiate a brew cycle and check the
water temperature immediately
below the sprayhead with a thermometer. The reading should not
be less than 195°F (76°C). Adjust
the control thermostat to increase
the water temperature. Replace if
necessary.
1. Funnel Loading
The BUNN® paper filter must be
centered in the funnel and the
bed of grounds leveled by gently
shaking.
2. Sprayhead
A clean spray-head must be used
for proper extraction.
Dry coffee grounds remain in
the funnel
Page 17
41721 111308