Bunn CDBC User Manual

1.53 Mb

CDBC, CDBCF CDBC APS, CDBCF APS CDBC TC, CDBCF TC

(Dual Voltage Models Starting at Serial #CDBC024477)

BUNN

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601

FAX: (217) 529-6644

29707.0001B 02/04 ©2003 Bunn-O-Matic Corporation

www.bunnomatic.com

INTRODUCTION

This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured for 120V 15 amp, 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.

CONTENTS

Introduction & Warranty ....................................................................................

2

User Notices ......................................................................................................

3

Electrical Requirements .....................................................................................

5

Plumbing Requirements, Initial Set-Up & Coffee Brewing .................................

6

Cleaning & Operating Controls ..........................................................................

7

Adjustments & Optional Settings .......................................................................

8

Pulse Brew Setup Procedure .............................................................................

9

Water Sensing Threshold Adjustment Procedure ..............................................

9

Troubleshooting ...............................................................................................

10

Diagnostics ......................................................................................................

20

Service.............................................................................................................

21

Wiring Diagrams ..............................................................................................

31

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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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.

#00658.0000

#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.)

#34072.0000

Optional Field Wiring

120 V, 15.0 A, 1800 W 1PH, 2-Wire, 60HZ

#29710.0005 (3 Warmers)

CDBC(F)-DV BREWERS

Optional Field Wiring

120 V, 12.5 A, 1500 W 1PH, 2-Wire, 60HZ

#29710.0006 (No Warmer)

CDBC(F) APS-DV BREWERS

Optional Field Wiring

120/208-240 V, 15.6-17.5 A, 2980-3850 W 1PH, 3-Wire, 60HZ

#29710.0007 (3 Warmers)

CDBC(F)-DV BREWERS

Optional Field Wiring

120/208-240 V, 13.0-15.0 A, 2680-3550 W 1PH, 3-Wire, 60HZ

#29710.0008 CDBC(F) APS-DV & TC-DV

BREWERS

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USER NOTICES (CONT.)

#02765.0000

#12364.0000

#00656.0000

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

ELECTRICAL REQUIREMENTS

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

Requirements for brewers without an attached cord set are as follows:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120V VERSION

 

120/208-240V VERSION

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

Requires 3-wire, grounded service rated 120/208-240 volts ac, 20 amp, single phase, 60 Hz.

ELECTRICAL HOOK-UP

CAUTION Improper electrical installation will damage electronic components.

1.An electrician must provide electrical service.

2.Determine the available on-site electrical service.

3.Select the desired unit voltage 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 access panel beneath the sprayhead to gain access to 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 wiring the machine for operation on 120/208 or 120/240 volts with a Power Supply Cord, the 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 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.

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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 12" 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 14" flare.

NOTE - Bunn-O-Matic recommends 14" copper tubing for installations of less than 25 feet and 38" for more than 25 feet from the 12" water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer 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 Building Officials and Code Administrators International, Inc. (BOCA)

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.

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.FAUCET MODELS:

On faucet models, 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.

NON-FAUCET MODELS

On non-faucet models, initiate a brew cycle and allow it to run approximately 20 seconds. Turn the ON/OFF switch to the "OFF" position. Allow the water to drain and empty the decanter.

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.

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CLEANING

1.The use of a damp cloth rinsed in any mild, nonabrasive, 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.

OPERATING CONTROLS

P1626

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.

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.

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ADJUSTMENTS & OPTIONAL SETTINGS

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.

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).

3.Press and hold the brew start button until you hear the brew solenoid click on-and-off three times (approximately 10 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

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until you hear the solenoid click on-and-off three times (approximately 10 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.

PULSE BREW SETUP PROCEEDURE

The pulse brew parameters (initial fill time, off times, and remaining on times) are entered using the following set-by-example process.

1.First set the brew volume using the standard procedure in Brew Volume Setup.

2.Position an empty container under the sprayhead. Allow the tank to finish refilling. Make sure that the READY lamp is on, or that the BREW LOCKOUT function is turned off.

3.Press and hold the OFF/ON button. The brew valve will turn on after 10 seconds. Release the button. This begins the initial on-time setting. When the spray has continued for the desired time, momentarily press the OFF/ON button.

4.The spray is now stopped and the off time setting has begun. Press the OFF/ON button momentarily to end the off time.

5.The spray is now on again and the remaining on time setting has begun. Press the OFF/ON button momentarily at the end of the desired remaining on time.

6.The setup is now complete and the parameters are stored in memory. The spray will continue the off and on cycles until the brew volume of step 1 is complete. Pressing the OFF/ON button again will terminate the brewing cycle, with the parameters stored in memory.

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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

 

 

 

PROBLEM

 

PROBABLE CAUSE

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

REMEDY

Press OFF/ON switch 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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TROUBLESHOOTING (cont.)

REFILL CIRCUIT (cont.)

PROBLEM

Fill or refill does not shut "OFF" (ON/ OFF Switch "ON")

Fill or refill does not shut "OFF" (ON/ OFF Switch "OFF")

PROBABLE CAUSE

1.Lime build up on probe

2.Water Level Probe Sensing System

3. Refill valve or control board

1. Refill valve or control board

REMEDY

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

Disconnect the brewer from the power source. Disconnect the J3 connector from the control board. Check for continuity from the nut on top of the level probe to pin 1 of the plug, continuity should be present. Pull the temperature probe up about an inch from the grommet. Check for continuity from the outside surface of the temperature probe and pin 4 of the plug, continuity should be present. Connect the J3 plug to the control board and proceed to step 3.

Press ON/OFF switch to "ON" (Indicator lamp should be lit). If water continuously flows out of air vent tube, disconnect the brewer from the power source. If water flow stops, replace the control board. If water flow does not stop, repair or replace the refill solenoid. (See page 29)

If water continuously flows out of air vent tube, disconnect the brewer from the power source. If water flow does not stop, repair or replace the refill solenoid. If the valve closes when power is removed, replace the control board. (See page 22)

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TROUBLESHOOTING (cont.)

HEATING CIRCUIT

PROBLEM

Water does not heat to proper temperature

IMPORTANT: Make sure no temperature tests are taken before the ready light is "ON". Tank temperature must be stabilized before readings are taken.

PROBABLE CAUSE

1.Display flashing

2.Water not touching temperature probe

3.Water Level Probe Sensing System

4. Temperature Probe

5. Limit Thermostat

REMEDY

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

Remove temperature probe and grommet. Look into hole on tank lid. Water must be within one inch from top of tank.

Disconnect the brewer from the power source. Disconnect the J3 connector from the control board. Check for continuity from the tank mounting screw where the green wire mounts, to pin 2 of the plug, continuity should be present. Pull the temperature probe up about an inch from the grommet. Check for continuity from the outside surface of the temperature probe and pin 4 of the plug, continuity should be present. Connect the J3 plug to the control board and proceed to step 4.

Remove the probe from the grommet and submerge in a water bath of approximately 70°F(21°C). Connect an ohmmeter to pins 3 and 4 of the J3 connector. At 60°F(16°C) the reading should be 15.3k ±2k OHMS, at 70°F(21°C) the reading should be 11.8k ± 2k OHMS, and at 80°F(27°C) the reading should be 9.3k ± 2k OHMS. If the probe is within these parameters, reconnect the J3 plug to the control board.

Disconnect the brewer from the power source. Check for continuity across the limit thermostat terminals. Continuity should be present. If not replace the limit thermostat. (See page 25)

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TROUBLESHOOTING (cont.)

 

HEATING CIRCUIT (cont.)

 

PROBLEM

 

PROBABLE CAUSE

Water does not heat to proper tem-

6. Tank Heater

perature (cont.)

 

IMPORTANT: Make sure no tem-

 

perature tests are taken before the

 

ready light is "ON". Tank tempera-

 

ture must be stabilized before read-

 

ings are taken.

 

REMEDY

Disconnect the brewer from the power source. Check for continuity between the white terminal of the terminal block (or red terminal on 208/240volt models) and the black wire on the relay on the control board (Toggle Switch must be in 120/208-240V position on 208V & 240V models). There should be a low OHM reading. If no continuity is present, check for a wiring problem, then replace the tank heater if no wiring problem is found. (See page 26)

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TROUBLESHOOTING (cont.)

 

 

 

HEATING CIRCUIT (cont.)

 

 

 

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Spitting or excessive steaming

1. Lime build up on temperature

Inspect probe and tank assembly

(cont.)

probe, tank or tank heater

for excessive lime deposits. Delime

 

 

 

 

as required.

 

 

2. Temperature Probe

Remove the probe from the grom-

 

 

 

 

met and submerge in a water bath

 

 

 

 

of approximately 70°F(21°C). Con-

 

 

 

 

nect an ohmmeter to pins 3 and 4 of

 

 

 

 

the J3 connector. At 60°F(16°C) the

 

 

 

 

reading should be 15.3k ±2k OHMS,

 

 

 

 

at 70°F(21°C) the reading should

 

 

 

 

be 11.8k ± 2k OHMS, and at

 

 

 

 

80°F(27°C) the reading should be

 

 

 

 

9.3k ± 2k OHMS. If the probe is

 

 

 

 

within these parameters, reconnect

 

 

 

 

the J3 plug to the control board.

 

 

3. Control Board

Set the temperature to 200°F(93°C).

 

 

 

 

Let tank temperature stabilize. If

 

 

 

 

temperature in tank is above tem-

 

 

 

 

perature setting by more than 7°F,

 

 

 

 

replace the control board. (See page

 

 

 

 

22)

Brewer is making unusual noises

1. Plumbing lines

Plumbing lines should not rest on

 

 

 

 

the counter top.

 

 

2. Water supply

The brewer must be connected to a

 

 

 

 

cold water supply.

 

 

3. Lime build up

Remove the tank lid and clean in-

 

 

 

 

side of tank with a deliming agent, if

 

 

 

 

necessary.

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TROUBLESHOOTING (cont.)

 

 

BREWING CIRCUIT

 

 

PROBLEM

 

PROBABLE CAUSE

Brew cycle will not start

 

1. Display flashing

2. No water

3. No power or incorrect voltage to the brewer

4. ON/OFF switch not in the "ON" position

5. Low water temperature (Brew lockout is enabled)

6. Water not touching refill probe inside tank

7. Switch panel

REMEDY

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

Water lines and valves to the brewer must be open.

Check for voltage across the terminals at the terminal block.

The indicator lamp must be lit

Allow brewer to heat until ready lamp is lit, or disable the brew lockout feature. (See page 8 & 9)

Press ON/OFF switch (indicator must be lit). Brewer will refill until water touches probe inside tank. Water must be in contact with refill probe before brew cycle will start.

Disconnect the brewer from the power source. Disconnect the ribbon connector from the control board. Check for continuity between pins 1 & 2 (An arrow on the connector indicates pin 1). No continuity should be present. Press the BREW switch. Continuity should be present for as long as the switch is held down. If no continuity is present, replace the switch membrane decal. (See page 23)

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TROUBLESHOOTING (cont.)

 

 

 

BREWING CIRCUIT (cont.)

 

 

 

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Brew cycle will not start (cont.)

8. Control board or dispense valve

If the switch panel is operating prop-

 

 

 

 

erly, proceed as follows. Attach a

 

 

 

 

voltmeter to the terminals of the

 

 

 

 

dispense solenoid. Connect the

 

 

 

 

brewer to the power source. Turn

 

 

 

 

on the brewer and press the BREW

 

 

 

 

switch. Voltage should be present

 

 

 

 

at the solenoid terminals. If voltage

 

 

 

 

is not present, refer to the wiring

 

 

 

 

diagrams and check the wiring har-

 

 

 

 

ness. If voltage is present, check for

 

 

 

 

continuity across the terminals of

 

 

 

 

the solenoid coil. If continuity is not

 

 

 

 

present, replace the solenoid (See

 

 

 

 

page 24). If continuity is present,

 

 

 

 

the valve may be stuck closed.

Consistently low beverage level in

1. Brew volume

Set up brewer according to instruc-

the dispenser or beverage overflows

NOTE: Volume adjustments must

tions in section Adjustments-Brew

dispenser

be made with sprayhead installed.

Volumes. (See page 8) Using a stop

 

 

 

 

watch or second hand, time the

 

 

 

 

length of the brew cycle. Record

 

 

 

 

this time inside the top lid. If service

 

 

 

 

is ever needed again, use the time

 

 

 

 

as reference to determine if time

 

 

 

 

has changed.

 

 

2. Lime build up

Inspect the dispense valve and

 

 

 

 

sprayhead for excessive lime de-

 

 

 

 

posits. Delime as required.

 

 

3. Dispense Valve

Remove dispense valve and clear

 

 

 

 

any obstructions. Rebuild or re-

 

 

 

 

place valve if necessary. (See page

 

 

 

 

24)

Page 17

29707.1 082803

 

TROUBLESHOOTING (cont.)

 

 

 

 

BREWING CIRCUIT (cont.)

 

 

 

 

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Dripping from sprayhead

 

1. Lime build up

 

Inspect the tank assembly for ex-

 

 

 

 

cessive lime deposits. Delime as

 

 

 

 

required.

 

 

2. Dispense valve

 

Remove the dispense valve and clear

 

 

 

 

any obstructions. Rebuild or re-

 

 

 

 

place the valve if necessary. (See

 

 

 

 

page 24)

Weak beverage

 

1. Sprayhead

 

A clean sprayhead must be used for

 

 

 

 

proper extraction.

 

 

2. Water temperature

 

Place an empty brew funnel on an

 

 

 

 

empty decanter beneath the spray-

 

 

 

 

head. Initiate brew cycle and check

 

 

 

 

the water temperature immediately

 

 

 

 

below the sprayhead with a ther-

 

 

 

 

mometer. The reading must not be

 

 

 

 

less than 195°F (91°C). Adjust the

 

 

 

 

temperature setting to increase the

 

 

 

 

water temperature. Refer to Initial

 

 

 

 

Set-up instructions.

3.Filter type

4.Coffee grind

5.Funnel loading

BUNN® paper filters must be used for proper extraction.

A fine drip or grind must be used for proper extraction.

The BUNN® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gently.

Page 18

29707.1 082803

 

TROUBLESHOOTING (cont.)

 

 

BREWING CIRCUIT (cont.)

 

 

PROBLEM

 

PROBABLE CAUSE

Dry coffee grounds remain in the

1.

Sprayhead

funnel

 

 

 

 

2.

Funnel loading

1. Warmer

Low beverage serving temperature

REMEDY

Make sure sprayhead is present and holes are clear and unobstructed. (See Weak Beverage Page 18)

The BUNN® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gently.

Disconnect the brewer from the power source. Remove the warmer plate and turn upside down to expose the warmer terminals. Remove the two wires. Check for continuity across the two warmer terminals. If continuity is not present, replace the warmer element (See page 30). If continuity is present, reconnect the wires to the warmer element. Check for voltage at the warmer terminals. Turn the warmer switch "ON". The indicator light will come on. Voltage should be present at the terminals. If not, disconnect power supply and check wiring and switch.

Page 19

29707.1 082803

 

DIAGNOSTICS

Intermittent flashing of the bank of temperature indicators, indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to investigating the fault.

FLASHES

CAUSE

THINGS TO CHECK

 

 

 

1

Dry Plug - In Fault -

Water Pressure (Is water shut "OFF"?)

 

Sheath of temperature probe dry for 10 minutes after power-up

Temperature probe wiring

 

 

Fill valve wiring, function, & strainer

 

 

Green wire between tank and circuit board

 

 

 

2

Low Tank Level Fault -

Water pressure (Is water shut "OFF"?)

 

Level probe dry for 7 minutes after fill valve is energized

Level probe wiring

 

 

Temperature probe wiring

 

 

Fill valve wiring, function, & strainer

 

 

 

3

Low Water Temperature Fault -

Tank heater wiring & function

 

Sensor in tank is calling for heat for 30 minutes or more

Temperature probe wiring

 

 

 

4

Tank Sensor Disagreement -

Temperature probe wiring

 

Level probe detects water, but dry plug-in probe dry

Level probe wiring

 

 

Green wire between tank and circuit board

 

 

 

5

Temp Sensor Out-of-Range - High

Sensor not connected to circuit board

 

 

 

6

Temp Sensor Out-of-Range - Low

Sensor wires shorted together or to chassis

 

 

 

Page 20

29707.1 082803

 

SERVICE

 

This section provides procedures for testing and

 

replacing various major components used in this

 

brewer should service become necessary. Refer to

 

Troubleshooting for assistance in determining the

 

cause of any problem.

 

WARNING - Inspection, testing, and repair of electri-

 

cal equipment should be performed only by qualified

 

service personnel. The brewer should be unplugged

 

when servicing, except when electrical tests are re-

 

quired and the test procedure specifically states to

 

plug in the brewer.

 

COMPONENT ACCESS

 

WARNING - Disconnect the brewer from the power

 

source before the removal of any panel or the replace-

 

ment of any component.

 

All components are accessible by the removal of

 

the top cover or warmer housing, front access panel

 

and warmer plate(s).

 

The top cover is attached with one #4-40 screw.

 

The front access panel is attached with four #6-32

 

screws.

 

Each warmer assembly is attached with three #4-

 

40 screws.

 

Contents

 

Control Board .................................................... 22

 

Switch Panel ...................................................... 23

 

Dispense Valve .................................................. 24

 

Limit Thermostat ............................................... 25

 

Tank Heaters ...................................................... 26

 

Voltage Selector Switch ..................................... 28

!

 

Refill Valve ......................................................... 29

 

Warmer Elements .............................................. 30

 

Wiring Diagrams ............................................... 31

 

 

P1889

 

FIG. 1 COMPONENT ACCESS

Page 21

29707.1 082803

 

SERVICE (cont.)

CONTROL BOARD

P1846

FIG. 2 CONTROL BOARD

Location:

The Control Board is located inside the top cover behind the front end cap.

Test Procedures:

The test procedures for the control board will vary depending upon the problems experienced by the brewer. Refer to the Troubleshooting guide beginning on page 10. The troubleshooting guide is divided into three sections, Refill Circuit, Heating Circuit, and Brewing Circuit.

Removal and Replacement:

1.Disconnect the black wire and blue wire from the relay on the control board.

2.Disconnect the 10-pin connector and the 4-pin connector from the main wiring harness.

3.Disconnect the 11-pin connector from the control panel.

4.Remove the four #6 screws and four nylon washers and the two #4-40 screws securing the control board to the end cap assembly.

5.Install a new control board and secure with the four #6 screws and nylon washers and the two #4- 40 screws to the end cap assembly.

NOTE: The four nylon washers must be installed under the heads of the four #6 screws to prevent a possible shorting of the control board circuits.

6.Connect the 11-pin connector from the control panel.

7.Connect the 10-pin connector and the 4-pin connector from the main wiring harness.

8.Connect the blue wire and black wire to the relay on the control board.

9.Refer to Adjustments and Optional Settings (See page 9) to program the new control board.

Page 22

29707.1 082803

 

SERVICE (cont.)

SWITCH PANEL

P1848

FIG. 3 SWITCH PANEL

Location:

The Switch Panel is located in the front of the hood.

Procedures:

The test procedures for the switch panel and the control board will vary depending upon the problems experienced by the brewer. Refer to the Troubleshootguide beginning on page 10. The troubleshooting guide is divided into three sections, Refill Circuit,

Heating Circuit, and Brewing Circuit.

Removal and Replacement:

1.Disconnect the 11-pin connector to the switch panel from the control board.

2.Remove the four #6 screws, nylon washers and the two #4-40 screws securing the control board to the end cap assembly and set aside.

3.Gently pry the switch panel from the end cap assembly.

4Remove any adhesive that remains on the end cap.

5.Remove the adhesive backing from the new switch panel. Insert the ribbon connector through the slot in the end cap and apply the switch panel to the end cap.

6.Install the control board to the back side of the end cap using the four #6 screws, nylon washers and the two #4-40 screws to the end cap assembly.

NOTE: The four nylon washers must be installed under the heads of the four #6 screws to prevent a possible shorting of the control board circuits.

7.Reconnect the 11-pin connector from the switch panel to the control board making sure every pin on the control board is inserted into the ribbon cable plug.

Page 23

29707.1 082803

 

SERVICE (cont.)

DISPENSE VALVE

6. Connect the voltmeter lead ends to the dispense valve coil terminals. Connect the brewer to the power source. Brewer temperature lockout must be disabled. Place "ON/OFF" Switch in the "ON" position. Press and release the brew switch. The indication must be 120 volts ac.

7. Disconnect the brewer from the power source.

If voltage is present as described, but no coil action is observed, nor "clicking" heard, dispense valve is defective. Replace valve and test again to verify repair. If voltage is not present as described, refer to Wiring Diagrams and check the brewer wiring harness. Also check the control board and switch panel for proper operation. (See Pages 22 and 23.)

 

P1852

Removal and Replacement:

 

 

 

 

 

FIG. 4 DISPENSE VALVE

1.

Disconnect wires from the dispense valve.

 

 

2.

Drain enough water from the tank so the dispense

Location:

 

valve is above the water level.

 

 

The dispense valve is located inside the top cover

3.

Remove water lines from the dispense valve.

behind the front end cap.

4.

Remove the two #8-32 nuts securing the dispense

 

 

 

valve to the sprayhead panel.

 

Test Procedures:

5.

Install a new dispense valve using the two #8-32

1. Disconnect the brewer from the power source.

 

nuts.

 

2. Check the water level in the tank to confirm that it

6.

Reconnect water lines to the dispense valve and

 

is within 1/2" from the top of the tank.

 

secure in place with clamps.

 

3. Connect the brewer to the power source. If the

7.

Refer to FIG. 5 when reconnecting wires.

 

brewer has been set for brewer temperature lock-

 

 

 

 

out, this feature must be disabled. See Page 9 for

 

 

 

 

procedure.

 

 

WHI/GRN from

4.

Check the dispense valve for coil action. Place the

 

 

 

 

Control Board

 

ON/OFF switch in the "ON" position, press and

 

 

 

 

 

 

 

release the BREW switch. Listen carefully in the

 

 

from Terminal

 

vicinity of the dispense valve for a "clicking" sound

 

 

Block

 

as the coil magnet attracts and repels the plunger.

 

 

 

5. Disconnect the brewer from the power source.

 

 

 

If the sound is heard as described, there may be a

 

 

 

blockage in the dispense valve or the water line to the

 

 

 

sprayhead. Remove the dispense valve and inspect for

 

 

P1853

wear, and remove waterborne particles.

 

 

 

FIG.

WIRING

If the sound is not heard as described, proceed to #6.

 

 

 

 

 

Page 24

 

29707.1 082803

 

 

 

LIMIT THERMOSTAT

Location:

The limit thermostat is located inside the top access panel on the front side of the tank.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the blue and black wires from the limit thermostat.

3.With an ohmmeter, check for continuity across the limit thermostat terminals.

If continuity is present as described, the limit thermostat is operating properly.

If continuity is not present as described, replace the limit thermostat.

Page 25

SERVICE (cont.)

TANK HEATERS

Location:

The tank heaters are located inside the tank and secured to the tank bottom.

Test Procedures :

1.Disconnect the brewer from the power source.

2.With a voltmeter, check voltage across the white or red wire from the terminal block and black wire from the control board. Connect brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models or 208-240 volts ac for three wire 120/208-240 volt models.

3.Disconnect the brewer from the power source.

4.Check voltage across the red wire from the terminal block and black wire from the control board. Connect brewer to the power source. The indication must be 208 or 240 volts ac.

5.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #6

If voltage is not present as described, refer to the Wiring Diagrams and check wiring harness.

6.Disconnect the black and blue wires or the red and white/violet wires from the tank heater terminals.

7.Check for continuity across tank heater terminals.

If continuity is present as described, reconnect the wires, the tank heater is operating properly.

If continuity is not present as described, replace the tank heater.

NOTE- If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.

Removal and Replacement:

1.Remove the top cover or top warmer housing and front access panel as previously described.

2.Disconnect the vent hose from the top of the tank by pulling the elbow fitting from the grommet in the top of the tank lid.

3.Drain water from the tank.

4.Disconnect the water supply tube to the dispense valve from the side of the tank.

5.Disconnect the water supply tube to the solenoid

P1890

FIG. 8 TANK HEATERS

valve from the bottom of the tank.

6.On brewers with faucet, disconnect the outlet water line to the faucet from the side of the tank.

7.Disconnect the temperature probe from the top of the tank by pulling the probe from the grommet in the top of the tank lid.

8.Disconnect the pink wire from the level probe.

9.Disconnect the green wire from the top of the tank.

10.Disconnect the limit thermostat from the side of the tank.

11.Disconnect the two white wires from the tank warmer blanket.

12.Disconnect the black, blue, white/violet and red wires from tank heater terminals.

13.Remove the four #8-32 nuts securing the tank to the mounting brackets and remove the tank assembly.

14.Remove the eight #8-32 nuts securing the tank lid to the tank.

15.Remove the two hex nuts securing the tank heater to the bottom of the tank. Remove tank heater with gaskets and discard.

16.Install new tank heater(s) with gaskets to the bottom of the tank and secure with two hex nuts.

17.Install tank assembly onto mounting brackets and secure in place with four #8-32 nuts.

18.Install tank lid and secure in place with eight #8-32 nuts.

19.Connect the two white wires of the tank warmer blanket.

Page 26

29707.1 082803

 

SERVICE (cont.)

TANK HEATERS (cont.)

20.Connect the limit thermostat to the front of the tank assembly.

21.Connect the green wire to the tank mounting bracket using #8-32 nut.

22.Connect the pink wire to the level probe.

23.Insert the temperature probe through the grommet in the tank lid.

24.Install the elbow fitting of the vent hose into the grommet in the tank lid.

25.On brewers with faucet, connect the outlet water line of the faucet to the side of the tank and secure with clamp.

26.Connect the water supply tube from the solenoid to the bottom of the tank and secure with clamp.

27.Connect the water supply tube from the dispense valve to the side of the tank and secure with clamp.

28.Refer to the Wiring Diagrams when reconnecting the tank heater wires.

29.Install access panels and covers and refer to Initial Set-up for refill and operation.

Page 27

29707.1 082803

 

SERVICE (cont.)

VOLTAGE SELECTOR SWITCH

If continuity is not present as described, replace the voltage selector switch.

Removal and Replacement:

1. Disconnect the brewer from the power source.

2. Disconnect the three wires from the selector switch.

3. Remove the switch mounting nut from the under side of component mounting bracket; remove

switch from bracket.

4. Install new switch in component mounting bracket and secure with mounting nut.

5. Refer to FIG. 10 when reconnecting wires to the switch.

P2503

FIG. 9 VOLTAGE SELECTOR SWITCH

Location:

The voltage selector switch is located on the component mounting bracket behind the front access panel.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Disconnect the white and blue wires from the selector switch. With the selector switch in the 120V position, check for continuity between the two empty terminals of the switch.

If continuity is present as described, reconnect the white wire and continue to Step 3.

If continuity is not present as described, replace the voltage selector switch.

3.With the selector switch in the 120/208-240V position, disconnect the white/violet wire from the selector switch. check for continuity between the two empty terminals.

If continuity is present as described, the voltage selector switch is operating properly.

Page 28

WHI/VIO to Tank Heater

Blue to Tank Heater

White to Terminal Block

P2504

FIG. 10 VOLTAGE SELECTOR

SWITCH TERMINALS

29707.1 082803

SERVICE (cont.)

 

 

REFILL VALVE

If continuity is not present as described, replace the

 

refill valve.

 

6.

Check the refill valve for coil action. Connect the

 

 

brewer to the power source. With "ON/OFF" switch

 

 

in the "ON' upper position press start switch and

 

 

listen carefully in the vicinity of the refill valve for

 

 

a" clicking" sound as the coil magnet attracts.

 

7.

Disconnect the brewer from the power source.

 

If the sound is heard as described and water will not

 

pass through the refill valve, there may be a blockage

 

in the water line before the refill valve or, the solenoid

 

valve may require inspection for wear, and removal of

 

waterborne particles.

 

If the sound is not heard as described, replace the refill

 

valve.

P1857

Removal and Replacement:

 

FIG. 11 REFILL VALVE

1.

Remove both wires from the refill valve.

 

2.

Turn off the water supply to the brewer and drain

Location:

 

the tank.

3.

Disconnect the water lines to and from the refill

The refill valve is located inside the trunk on the

 

valve.

lower center part of the component bracket.

4.

Remove the two 1/4"-20 screws securing the refill

Test Procedures:

 

valve mounting bracket to the component bracket.

 

Remove bracket and valve as an assembly.

1. Disconnect the brewer from the power source.

5.

Using two 1/4"-20 screws install the new refill

2. Disconnect the white and white/blue wires from

 

valve and bracket to the component bracket.

the refill valve. Set the "ON/OFF" switch in the "ON"

6.

Securely fasten the water lines to and from the

upper position.

 

valve.

3. With a voltmeter, check the voltage across the coil

7.

Refer to FIG. 12 when reconnecting the wires.

wires. Connect the brewer to the power source.

8.

Install access panels and covers and refer to Initial

The indication must be 120 volts ac for two wire

 

Set-up for refill and operation.

120 volt models and three wire 120/208 and 120/

 

 

240 volt models.

 

 

4. Disconnect the brewer from the power source.

 

 

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to Wiring

Diagrams and check brewer wiring harness.

5. Check for continuity across the refill valve coil

WHI from Terminal

 

terminals.

Block

 

If continuity is present as described, reconnect the

WHI/BLU from

 

Control Board

P1858

white and white/blue wires from the circuit board.

 

 

 

 

FIG. 12 REFILL VALVE WIRING

 

Page 29

29707.1 082803

 

SERVICE (cont.)

WARMER ELEMENT(S)

 

NTER

 

DECA

 

CAUTIONARD

!

DISC

IF:

P1859

FIG. 13 WARMER ELEMENTS

Location:

The warmer element(s) is located under the warmer plate.

Test Procedures:

1.Disconnect the brewer from the power source.

2.With a voltmeter, check voltage across the two wires at the warmer element with the "ON/OFF" switch in the "ON" position. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/208 and 120/240 volt models.

3.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to Wiring Diagrams and check brewer wiring harness.

4.Check the continuity across the two terminals on the warmer element.

If continuity is present as described, reconnect the two wires to the warmer element.

If continuity is not present as described, replace the warmer element.

Removal and Replacement:

1.Remove the three #4-40 screws securing the warmer assembly to the brewer.

2.Lift the warmer assembly from the brewer.

3.Disconnect the two wires from the warmer element terminals.

4.Remove the two #8-32 nuts securing the warmer element to the warmer plate.

5.Securely install new warmer element.

6.Reconnect the two wires to warmer element terminals.

7.Securely install warmer assembly on the brewer.

8.Refer to the Wiring Diagrams when reconnecting the wires.

Page 30

29707.1 082803

 

SCHEMATIC WIRING DIAGRAM CDBC DV

L1

N L2

GRN

 

 

 

 

 

 

 

 

SELECTOR

 

 

 

 

 

 

 

LIMIT

 

 

 

 

SWITCH

WHI-14

 

 

 

 

 

 

TANK HEATER

 

 

 

 

 

 

 

 

 

 

THERMOSTAT

 

BLU-14

 

 

 

 

 

 

 

 

 

BLK-14

 

 

 

 

TANK HEATER

 

 

 

BLK-14

BLU-14

1425W

 

 

 

 

WHI/VIO-14

RED-14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"KEEP WARM" HEATER

 

 

 

 

 

2268W

 

 

 

WHI

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

BREW STATION WARMER

 

 

 

 

 

 

 

 

WHI/RED

(CONTROLLED BY ON/OFF SW)

 

WHI

 

 

COUNTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REFILL

 

 

 

(OPTIONAL)

 

 

 

 

 

 

 

WHI

 

J1-1

BLK

 

 

 

 

 

 

WHI/BLU

 

SOL

C

BLK

 

 

 

 

 

DISPENSE

 

 

 

J1-2

 

 

 

 

 

 

 

 

 

O

COM

BLU-14

 

 

WHI/GRN

SOL

 

 

 

 

WHI

N

N.O.

BLK-14

 

 

 

 

 

 

 

 

 

 

T

WHI

 

 

 

 

 

 

 

 

 

 

WHI

R

J1-1

 

 

 

 

 

WARMER ASSY "A"

 

 

 

O

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

BRN/BLK

 

 

 

P2

 

 

FRONT WARMER

 

P1

 

WHI

 

 

 

BRN/BLK

 

BRN/BLK

WHI

 

P

 

 

 

 

 

J1-5

WHI/BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C

WHI/RED

 

 

 

 

(SEE TABLE BELOW FOR USAGE)

W

 

P1, P2, &

 

 

 

 

 

 

 

 

YEL

 

 

 

 

H

 

P3 ARE

B

 

WHI/VIO

 

 

 

P3

 

 

REAR WARMER

I

 

 

 

VIO

 

 

VIO

 

PINS OF A

O

 

VIO

 

 

 

 

 

 

 

POLARIZED

A

 

WHI/GRN

 

 

 

 

 

 

 

 

 

J1-10

 

 

 

 

 

 

 

 

 

THREE-PIN

R

CONTROL PANEL ASSY

 

 

 

WARMER ASSY "B"

 

 

D

 

 

 

 

 

 

CONNECTOR.

 

J2-1

BREW SW

LT FRNT SW

LT REAR SW

 

P2

 

YEL

FRONT WARMER

WHI

P1

 

WHI

 

 

 

 

YEL

 

 

 

 

 

 

 

ON/OFF

SW

TOP FRNT SW

TOP REAR SW

 

(SEE TABLE BELOW FOR USAGE) W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P3

 

 

 

REAR WARMER

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J2-6

 

 

 

 

 

 

 

 

WHI/VIO

WHI/VIO

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIDDEN SW

RT REAR SW

RT FRNT SW

 

 

 

 

 

 

 

 

 

WARMER WIRING REFERENCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ALL CONFIGURATIONS INCLUDE BREW STATION WARMER)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J2-11

 

STATIC

(NOTE – ALL WARMERS ARE NOT

 

SHIELD

AVAILABLE ON ALL MODELS!)

 

J3-1

PNK

 

GRN

 

 

 

 

WHI

LEVEL

J3-4

BLK

 

PROBE

 

 

J5-1

BLK

 

 

 

 

 

t°

29685.0004B 02/04 ©2003 BUNN-O-MATIC CORPORATION

 

LEFT

TOP

RIGHT

WITH TOP WARMERS

"A"

WITH LEFT WARMERS

"B"

WITH RIGHT WARMERS

"A"

WITH LEFT & RIGHT WARMERS

"B"

"A"

WITH LEFT & TOP WARMERS

"B"

"A"

WITH RIGHT & TOP WARMERS

"A"

"B"

 

 

 

 

120V AC 2 WIRE 120/208V AC 3 WIRE 120/240V AC 3 WIRE SINGLE PHASE

Page 31

29707.1 021804

 

SCHEMATIC WIRING DIAGRAM CDBC APS-DV

CDBCF APS/TC/LPTC-DV

L1

 

 

 

 

GRN

 

 

N

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SELECTOR

 

 

 

 

LIMIT

 

 

 

 

SWITCH

 

 

 

 

 

TANK HEATER

 

WHI-14

 

 

 

 

THERMOSTAT

 

BLU-14

 

 

 

 

 

BLU-14

BLK-14

 

 

TANK HEATER

 

 

 

BLK-14

 

 

 

WHI/VIO-14

 

 

 

 

1425W

 

RED-14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"KEEP WARM" HEATER

 

 

2268W

 

 

 

WHI

 

 

 

WHI

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

COUNTER

 

 

 

 

 

 

 

 

 

(OPTIONAL)

 

 

 

 

 

 

 

 

J1-1

BLK

 

 

 

 

 

 

 

C

BLK

 

 

 

 

 

 

 

J1-2

 

 

 

 

 

 

 

BLU-14

 

 

 

 

 

 

 

O

COM

 

 

 

 

 

 

 

N

BLK-14

 

 

 

 

 

 

 

N.O.

 

 

 

 

 

 

 

T

WHI

 

 

 

 

 

WHI

 

R

J1-1

 

 

 

 

 

 

O

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

REFILL

 

 

 

 

 

 

 

 

 

 

 

 

 

P

J1-5

WHI/BLU

 

WHI/BLU

SOL

 

 

WHI

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

DISPENSE

 

 

O

 

 

 

 

 

 

 

WHI

 

A

J1-10

WHI/GRN

 

 

 

WHI/GRN

SOL

 

R

CONTROL PANEL ASSY

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

J2-1

BREW SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON/OFF SW

 

 

 

 

 

 

 

 

J2-6

HIDDEN SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J2-11

STATIC

 

 

 

 

 

 

 

 

SHIELD

 

 

 

 

 

 

 

 

J3-1

PNK

 

 

 

 

120V AC 2 WIRE

 

 

 

 

GRN

 

 

 

120/208V AC 3 WIRE

 

 

 

 

WHI

LEVEL

 

 

 

 

 

J3-4

BLK

 

 

120/240V AC 3 WIRE

 

 

 

PROBE

 

 

 

 

 

 

 

 

 

 

SINGLE PHASE

 

 

 

 

BLK

 

 

 

 

 

 

 

J5-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t°

 

 

 

29685.0005B 02/04 ©2003 BUNN-O-MATIC CORPORATION

 

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