Bunn CWTF User Manual

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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-MATICCORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601FAX: (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-Maticwebsite, 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-MaticCorporation at1-800-286-6070.

41721.0000B 08/10 ©2008 Bunn-O-MaticCorporation

BUNN-O-MATICCOMMERCIAL PRODUCT WARRANTY

Bunn-O-MaticCorp. (“BUNN”) warrants equipment manufactured by it as follows:

1)All equipment other than as specified below: 2 years parts and 1 year labor.

2)Electronic circuit and/or control boards: parts and labor for 3 years.

3)Compressors on refrigeration equipment: 5 years parts and 1 year labor.

4)Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years or 30,000 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, damage or casualty. 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) 529-6601or by writing to Post Office Box 3227, Springfield, Illinois62708-3227;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, 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, 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, Digital Brewer Control, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Tea At Its Best, Phase Brew, The Horizontal Red Line, Titan, trifecta, Ultra, Velocity Brew are either trademarks or registered trademarks ofBunn-O-MaticCorporation.

Page 2

41721 051910

 

INTRODUCTION

This equipment will brew one or two half-gallonbatches 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.

#00656.0001

#03408.0002

#03409.0002

Optional Field Wiring

#00658.0000

To reduce the risk of electric shock, do not remove or open cover.

No user-serviceableparts inside. Authorized service personnel only. Disconnect power before servicing.

#37881.0000

120/208-240V,11.4-13.1A,2340-3100W

1PH, 3-Wire+ GND, 60HZ

! 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.

FAILURE TO COMPLY RISKS EQUIPMENT

DAMAGE, FIRE, OR SHOCK HAZARD

READ THE ENTIRE OPERATING MANUAL

BEFORE BUYING OR USING THIS PRODUCT

THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE

00831.0000F 3/98 ©1998 BUNN-O-MATICCORPORATION

#00831.0000

CAUTION WARMERS AND SURFACES ARE HOT

#02765.0000

Optional Field Wiring

120/208-240V,12.25-13.9A,2440-3200W

1PH, 3-Wire+ GND, 60HZ

#34955.0000

 

#34955.0001

 

 

APS MODELS

ONE WARMER MODELS

 

Optional Field Wiring

 

 

 

 

Optional Field Wiring

 

120/208-240V,13.0-14.8A,2540-3300W

 

120/208-240V,13.9-15.6A,2640-3400W

 

 

1PH, 3-Wire+ GND, 60HZ

 

1PH, 3-Wire+ GND, 60HZ

 

#34955.0002

 

#34955.0003

 

 

 

TWO WARMER BREWERS

THREE WARMER BREWERS

 

 

 

120V

 

 

 

120/208-240V

 

 

 

#34056.0000

 

 

 

 

 

#12364.0000

 

 

 

 

VOLTAGE SELECTOR SWITCH

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41721 080310

 

ELECTRICAL REQUIREMENTS

CAUTION - The brewer must be disconnected from the power source until specified inInitial Set-Up.

Model 15 has an attached cordset and requires2-wiregrounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.

BLK L1

 

RED

L2

 

BLU

L3

 

BLK

 

 

WHI

 

120V. A.C.

 

120V. A.C.

 

 

L1

 

N

WHI

 

RED

 

230V. A.C.

 

200 or 230V. A.C.

 

 

N

208 or 240V. A.C.

 

RED

 

 

 

L2

230V. A.C.

 

 

 

 

 

 

L2

 

 

 

 

BLK L1

120V. A.C.

 

 

230V. A.C.

 

 

 

 

 

BLK L1

 

 

 

 

 

 

 

 

 

 

 

 

 

P3516

 

 

 

 

 

 

 

 

 

Earth Ground

Chassis Ground

 

 

 

 

 

 

 

 

P1842

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1841

 

 

P1843

Earth Ground

Chassis Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Earth Ground

Chassis Ground

Earth Ground

Chassis Ground

 

 

 

Model 20

 

 

 

Model 35

 

230V ac

 

200 or 230V ac

Requires 2-wire,ground-

Note: This electrical service

3 phase models

single phase models

ed service rated 120 volts

Note: This electrical service

 

 

P1842

ac, 20 amp, single phase,

consists of 3 current carrying

Note: This electrical service

60 Hz. Proceed as follows:

conductors (Neutral, L1 and

consists of 3 current carry-

consists of 2 current carry-

 

 

 

L2) and a separate conductor

ing conductors (L1, L2 and

ing conductors (L1 and L2)

 

 

 

for earth ground.

L3) and a separate conduc-

and a separate conductor

 

 

 

 

 

 

tor for earth ground.

for earth ground.

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 – Improperelectrical 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. 5-1Dual Volt Switch Position

 

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41721 080310

 

PLUMBING REQUIREMENTS-CURRENTSINGLES

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 12" or larger supply line. Ashut-offvalve 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 is14" flare.

NOTE - Bunn-O-Maticrecommends14" copper tubing for installations of less than 25 feet and38" for more than 25 feet from the12" water supply line. A tight coil of tubing in the water line will facilitate moving the brewer to clean the countertop.Bunn-O-Maticdoes 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

Models CTF & CWTF

FIG 6-2

Models CT & CWT

Page 6

41721 080310

 

PLUMBING REQUIREMENTS-CURRENTTWINS

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 12" or larger supply line. Ashut-offvalve 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 is38" 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-installrear utility cover. FIG7-3

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-EARLYSINGLES

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 12" or larger supply line. Ashut-offvalve 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 is14" flare.

NOTE - Bunn-O-Maticrecommends14" copper tubing for installations of less than 25 feet and38" for more than 25 feet from the12" water supply line. A tight coil of tubing in the water line will facilitate moving the brewer to clean the countertop.Bunn-O-Maticdoes 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

Models CTF & CWTF

FIG 8-2

Models CT & CWT

Page 8

41721 080310

 

PLUMBING REQUIREMENTS-EARLYTWINS

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 12" or larger supply line. Ashut-offvalve 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 is38" 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-installrear utility cover. FIG9-3

6.On models with faucet, place an empty vessel beneath the faucet and lift the handle until water is dispensed.

 

 

 

FIG 9-1

 

P1241

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIG 9-2

 

 

 

 

FIG 9-3

 

 

 

P1241

P1241

 

 

 

 

 

 

 

 

 

 

 

 

Page 9

41721 111308

 

INITIAL SET-UP

CAUTION - The brewer must be disconnected from the power source throughout the initialset-up,except when specified in the instructions.

1.Insert an empty funnel into the funnel rails.

2.Place an empty dispenser under the funnel.

3.Place the heater switch at the rear of the brewer in the “OFF” lower position and connect the brewer to the power source.

4.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