Bunn Coffee Maker CDBC-APS-DV Service Manual

CDBC-MV, CDBCF-MV

CDBC-MV, CDBCF APS-MV

CDBC-DV, CDBCF-DV

CDBC APS-DV CDBCF APS-DV

(DV Models prior to

Serial #CDBC024477)

DISCONTINUED VERSION

The information in this manual

BUNN

AUTIO

is no longer current.

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601 FAX: (217) 529-6644

INTRODUCTION

This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured for 120V 15 amp, 120V 20 amp (MV models only), 120/208V 20 amp or 120/240V 20 amp. The brewer may have a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter or shelf.

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

Bunn-O-Matic Corp. (“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) 529-6601 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.

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29707 080503

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.

Optional Field Wiring

120 V, 17.0 A, 2050 W

#00658.0000

1PH, 2-Wire, 60HZ

120/208-240 V, 13.6-15.3 A, 2640-3430 W

1PH, 3-Wire, 60HZ

#29710.0002 (MV models only)

TWO WARMER BREWERS

Optional Field Wiring

120 V, 18.0 A, 2150 W

1PH, 2-Wire, 60HZ

120/208-240 V, 14.4-16.2 A, 2740-3530 W

1PH, 3-Wire, 60HZ

#00831.0000

! CAUTION

When re-wiring the machine for operation on

120/208V or 120/240V, the replacement Power

Supply Cord must be UL Listed Flexible Cord Type

SO, SJO, SJTO, HSJO or SJOW, No. 12 AWG, 4

Conductor, Rated 90° C. Attachment Plug Cap

must be UL Listed, NEMA 14-20P or L14-20P Configuration, Rated 125/250V, 20 AMPS. The Power Supply Cord must be at least 3 feet long

and maximum 6 feet long (measured from Strain

Relief to end of the Attachment Plug Cap.)

#29710.0000 (MV models only)

THREE WARMER BREWERS

Optional Field Wiring

120/208-240 V, 14.4-16.2 A, 2740-3530 W

1PH, 3-Wire, 60HZ

#29710.0003 (DV models only)

THREE WARMER BREWERS

Optional Field Wiring

120/208-240 V, 12-13.7 A, 2440-3230 W

1PH, 3-Wire, 60HZ

#34072.0000

Page 3

#29710.0004 (DV models only)

APS BREWERS

29707 080503

USER NOTICES (CONT.)

Optional Field Wiring

120 V, 15.0 A, 1800 W

1PH, 2-Wire, 60HZ

#29710.0005 (DV models only)

CDBCF-DV BREWERS

Optional Field Wiring

120/208-240 V, 13.0-15.0 A, 2680-3550 W

1PH, 3-Wire, 60HZ

#29710.0008 (DV models only)

CDBC LPTC-DV BREWERS

Optional Field Wiring

120/208-240 V, 15.6-17.5 A, 2980-3850 W

1PH, 3-Wire, 60HZ

#29710.0007 (DV models only)

NO WARMER BREWERS

Optional Field Wiring

120 V, 16.2 A, 1950 W

1PH, 2-Wire, 60HZ

120/208-240 V, 12.7-14.5 A, 2540-3330 W

1PH, 3-Wire, 60HZ

#29710.0001 (MV models only)

ONE WARMER BREWERS

#02765.0000

#12364.0000

#00656.0000

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Models CDBC-DV, CDBC-APS DV & CDBCF LPTC-DV

ELECTRICAL REQUIREMENTS

CAUTION - The brewer must be disconnected from the power source until specified in

Brewers with an attached cord set require 2-wire, grounded service rated 120 volts ac, 15 amp, single

phase, 60 Hz. Requirements for brewers without an attached cord set are as follows:

1425W VERSION 3180W VERSION

Initial Set-Up.

Requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.

ELECTRICAL HOOK-UP CAUTION – Improper electrical installation will damage electronic components. The toggle switch is set to operate on a 120 volt, 15 amp service (1425W Version).

1. An electrician must provide electrical service.

2. Determine the available on-site electrical service.

3. Select the desired unit wattage based on the available on-site electrical service.

4. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.

5. If the brewer is to be connected to 120/208 or 120/240 volts, remove the front access panel beneath the sprayhead and remove the power cord (if provided) from the terminal block.

6. Feed the supply leads through the rear of the brewer.

7. Using the above diagrams, connect the desired electrical service to the field wiring terminal block.

8. If re-wiring the machine for operation on 120/208 or 120/240 volts with a Power Supply Cord, the replacement Power Supply Cord must be UL Listed Flexible Cord Type SO, SJO, SJTO, HSJO or SJOW, No. 12 AWG, 4

Conductor, Rated 90° C. Attachment Plug Cap must be UL Listed, NEMA 14-20P or L14-20P Configuration,

Rated 125/250V, 20 AMPS. The Power Supply Cord must be at least 3 feet long and maximum 6 feet long (measured from Strain Relief to end of the Attachment Plug Cap).

9. Before proceeding, verify the voltage at the field wiring terminal block.

10. Set toggle switch on component bracket to the appropriate position (120/208-240V) and replace the access panel.

11. 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

Requires 3-wire, grounded service rated 120/240 volts ac, 20 amp, single phase, 60 Hz.

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Models CDBC-MV & CDBC-APS MV

ELECTRICAL REQUIREMENTS

CAUTION - The brewer must be disconnected from the power source until specified in

TANK HEATER TERMINAL BLOCK WIRING DIAGRAM

(CDBC-MV MODELS)

1800W @ 120V

1800W

1425W @ 120V

2390W @ 120/208V 3180W @ 120/240V

1800W

Initial Set-Up.

W H

120V A.C.

1425W

208 or

240V A.C.

WHITE

NEUTRAL

L1 BLACK

1425W

B L K

REDWHIBLK

120V A.C.

B L K

WHITE

NEUTRAL

L1 BLACK

B L U

1425W

H T

REDWHIBLK BLK WHIRED

L2 REDL2 REDL2 RED

WHITE

120V A.C.

NEUTRAL

L1 BLACK

FIELD WIRING TERMINAL BLOCK DIAGRAM

1800W VERSION 1425W VERSION 2390W VERSION 3180W VERSION

Requires 2-wire, grounded service rated 120 volts ac, 20 amp, single phase, 60 Hz.

Requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.

Requires 3-wire, grounded service rated 120/208 volts ac, 20 amp, single phase, 60 Hz.

Requires 3-wire, grounded service rated 120/240 volts ac, 20 amp, single phase, 60 Hz.

P1888

ELECTRICAL HOOK-UP CAUTION – Improper electrical installation will damage electronic components. This unit is factory wired for operation on a 120 volt, 15 amp service (1425W Version).

1. An electrician must provide electrical service and verify that the tank heater connections are connected as specified in the above diagram.

2. Determine the available on-site electrical service.

3. Select the desired unit wattage based on the available on-site electrical service.

4. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.

5. Remove the front panel beneath the sprayhead.

6. Feed the supply leads through the rear panel of the brewer.

7. Using the above diagrams, connect the desired electrical service to the field wiring terminal block and remove the top cover of the brewer to verify the tank heater terminal block connections.

8. The electrical service connections at the field wiring terminal block must agree with the tank heater terminal block connections as specified in the above diagram.

9. Before proceeding, verify the voltage at the field wiring terminal block. Replace the panel and top cover.

10. 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

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PLUMBING REQUIREMENTS

These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi (138

and 620 kPa) from a 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

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 to clean the counter top. 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

and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).

1. Flush the water line and securely attach it to the inlet fitting at the left rear of the brewer.

2. Turn on the water supply.

⁄2" or larger supply line. A shut-off valve should be installed in the line before the brewer. Install

⁄4" flare.

⁄2" water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer

Building Officials and Code Administrators International, Inc. (BOCA)

INITIAL SET-UP

1. Insert an empty funnel into the funnel rails.

2. Place a decanter with a small amount of water under the funnel.

3. Connect the brewer to the power source.

4. Press the "ON/OFF" switch (indicator glowing).

5. Water will flow into the tank and stop when the tank is filled to its capacity.

6. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature.

7. Place a decanter beneath the faucet and open the faucet handle. Release it when you hear the tank refilling. Empty and place back onto warmer under the funnel.

8. With the "ON/OFF" switch in the "ON" position (indicator glowing), momentarily press and release the "BREW" switch.

9. Allow the cycle to finish and measure the amount of water in the decanter. It should be 64 ounces ± 2. Refer

to the adjustments section of this manual should the volume need to be increased or decreased.

The brewer is now ready for use in accordance with the coffee brewing instructions below.

COFFEE BREWING

1. Insert a BUNN® filter into the funnel.

2. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking.

3. Slide the funnel into the funnel rails.

4. Place an empty decanter beneath the funnel.

5. Press the "ON/OFF" switch (indicator glowing) then momentarily press and release the "BREW" switch.

6. When brewing is completed, simply discard the grounds and filter.

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.

2. Check and clean the sprayhead. The sprayhead holes must always remain open.

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OPERATING CONTROLS

ON/OFF SWITCH Pressing the "ON/OFF" switch (indicator glowing) supplies power to the brew station warmer, enables the brew circuit, and energizes the tank refill circuit. Pressing the switch again (indicator not glowing) stops tank refilling and brewing and de-energizes the brew station warmer. Stopping a brew cycle after it has been started will not stop the flow of water into the decanter until the funnel is empty.

P1626

NOTE – Hot water will be available at the faucet in a limited amount when the "ON/OFF" switch is in the "OFF" position because the tank will not refill.

BREW SWITCH

Momentarily pressing and releasing the switch starts a brew cycle when the "ON/OFF" indicator is glowing.

NOTE – The "ON/OFF" indicator must be glowing to initiate and complete a brew cycle.

ADDITIONAL WARMER SWITCHES

Pressing any additional warmer switch so that the indicator is glowing, supplies power to the associated

warmer.

READY INDICATOR

This indicator glows when the preset temperature has been achieved. The word "NOT" above "READY" will glow

in all other instances.

TEMPERATURE INDICATORS (Feature disabled from the factory – refer to page 8.)

The indicator glows to communicate the brew water temperature. Two indicators will glow when the

temperature is between them.

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ADJUSTMENTS & OPTIONAL SETTINGS

HIDDEN

SWITCH

P1866

Setting Brew Temperature

The brewer is factory set to brew at 200°F (95°C). To change this setting, press and hold the "HIDDEN" switch

beneath the "®". The word "TEMP" above the "ON/OFF" switch will glow to correspond with the temporary function change of this switch. Repeatedly press and release the "ON/OFF" switch until one of the bank of temperature indicators shows the approximate desired temperature. When two indicators are glowing, the temperature is approximately the number between them.

Displaying Brew Temperature

The brewer is factory set with the temperature display disabled. To change this setting, press and hold the "ON/ OFF" switch and the "HIDDEN" switch beneath the "®" for five seconds, the entire bank of temperature indicators will glow. Release both switches. Pressing and releasing the "ON/OFF" switch will toggle between turning the entire bank of temperature indicators on-or-off, signifying the "ON" or "OFF" condition of this display. Wait for a few seconds, the brewer will maintain this last setting.

Setting Brew Lockout

The brewer is factory set with the brew lockout disabled. Brew lockout prevents starting a brew cycle if the ready indicator is not glowing. When an attempt at brewing cannot be allowed, the word "NOT" and "LOCKOUT" flash for three seconds to indicate the reason the brew can't begin. To change the condition of the brew lockout, press and hold the "HIDDEN" switch beneath the "®" and momentarily press the "BREW" switch.

Adjusting Automatic Warmer Shut-Off

The brewer is factory set with this feature disabled. The automatic warmer shut-off de-energizes all warmers after a predetermined time period after the most recent brew cycle. To change the setting, press and hold the "BREW" switch and the "HIDDEN" switch beneath the "®" for five seconds, the entire bank of temperature indicators will flash on-and-off. Release both switches. Pressing and releasing the "BREW" switch will select the number of temperature indicators from none to five. When no indicators are glowing, this feature is disabled and all warmers will be controlled only by their respective switches. When one to five indicators are glowing, it indicates the approximate number of hours of delay before all warmers will be automatically de-energized after the most recent brew cycle.

IMPORTANT: The tank must be full and fill solenoid shut off prior to making these adjustments. The sprayhead must be installed when making adjustments. Adjusting Brew Volumes

The brewer is factory set to deliver 64 ounces ± 2 for each brew cycle.

BREW VOLUME SET-UP: Use the following steps when the setting is unknown or a different circuit board is being installed.

1. Place an empty funnel in the funnel rails and an empty decanter or graduated vessel beneath the funnel.

2. Press the "ON/OFF" switch (Indicator glowing).

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ADJUSTMENTS & OPTIONAL SETTINGS (CONT.)

3. Press and hold the brew start button until you hear the brew solenoid click on-and-off three times (approximately 5 seconds). Release the button.

4. Allow the cycle to continue until the desired amount of water is dispensed and then turn "OFF" the brewer.

The brewer is now set to dispense this amount of water for each subsequent brew cycle.

To increase the amount of water for each brew cycle place an empty funnel in the funnel rails and an empty

decanter or graduated vessel beneath the funnel. Press the "ON/OFF" switch. Press and hold the "BREW" switch until you hear the solenoid click on-and-off three times (approximately 5 seconds), then release the "BREW" switch. Momentarily press and release the "BREW" switch once for each ounce (approximate) of water to be added to the prior setting and allow the brew cycle to finish.

To decrease the amount of water for each brew cycle place an empty funnel in the funnel rails and an empty

decanter or graduated vessel beneath the funnel. Press the "ON/OFF" switch. Momentarily press and release the "BREW" switch once for each ounce (approximate) of water to be removed from the existing setting. Press and hold the "BREW" switch until you hear the solenoid click on-and-off three times (approximately 5 seconds), then release the "BREW" switch and allow the cycle to finish.

WATER SENSING THRESHOLD ADJUSTMENT PROCEDURE

1. Make sure the tank is full of water to be used for calibration. The water must be in contact with the refill probe.

2. Unplug the brewer from the power source, then press and hold the BREW button while power is reapplied.

3. Continue pressing the BREW button until the READY indicator begins to flash. Release the BREW button and then press it again momentarily.

4. The new calibration is automatically completed within a few seconds. If the water is too pure for use with the brewer, the READY indicator will flash very rapidly and the old calibration will be retained.

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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.

Before troubleshooting this brewer, check for the following:

Control Boards

1. Make sure ribbon cable is properly attached to the control board (ALL PINS INSERTED INTO PLUG).

2. Make sure there is a nylon insulating washer under each screw head that holds the control board to the plastic front end cap. This is important for proper operation.

3. Make sure before servicing brewer that voltage is present at control board.

4. Press any warmer switch or observe if any indicator lights are glowing on the control panel. If so, proceed with testing. If not, check for voltage across pins 1 & 2 of the ten pin J1 connector (black and white wires). If voltage is present, replace the control board. If voltage is not present, check wiring and voltage across terminal block (black and white). Correct the problem and retest before proceeding with testing.

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TROUBLESHOOTING (cont.)

REFILL CIRCUIT

PROBABLE CAUSE REMEDYPROBLEM

Will not fill or refill

1. Power off to brewer

2. Water shut off

3. Display flashing

4. ON/OFF Switch

5. Lime build up on Probe

6. Refill Valve or Control Board

Press warmer switches on control panel to determine if power is ON.

Make sure water is ON.

Brewer has shut down due to malfunction (See Diagnostic Chart in manual, Page 20, or under top lid of brewer).

Make sure ON/OFF Switch is "ON" and indicator is lit.

Remove the Level Probe and check for lime deposit on tip. Clean and reinstall.

Disconnect the brewer from the power source and remove wires from refill valve coil. Check for continuity across the terminals of the solenoid coil. If continuity is not present, replace the refill valve (See page 29). If continuity is present, the coil may be stuck closed. Shut water off to brewer. Set the ON/OFF switch to the "OFF" position. Open the faucet and drain water down in the tank until flow stops or slows to a trickle. Attach a voltmeter to the terminals of the refill solenoid. Connect the brewer to the power source. Press the switch "ON". Within five seconds, voltage should be present at the solenoid terminals. If voltage is not present, refer to the wiring diagrams and check the wiring harness.

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