Bunn CW-APS, CWT-TS User Manual

667.24 Kb

BUNN®

CW-APS

CWU NT-NTS

 

 

 

 

 

 

 

T IO

N

NT E

R

 

 

 

 

 

A

U

D D

E C A

 

 

 

 

 

 

 

C

 

C A R

 

 

 

 

 

 

!

 

D IS

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

IF¥¥¥

SBC: COR ARAILTACEETKDDCENDHWRHEHYIDGE HNE LFEELMCAPTMTREYIC

 

 

 

 

 

 

¥

H E

E D O O S E D

 

 

 

 

 

 

 

 

 

¥

U S

E X P

T S

A NU A

L

 

 

 

 

T E N T

S

 

O LRE ME N

 

 

 

 

 

O N

 

 

E

A T IN

G MC T

 

 

 

 

E L

C H O T

 

 

P E R

P R O

 

 

 

 

 

F U NNA R E

E N

T IR E

GO T H IINJURYS

 

 

 

 

 

R E

 

T H E

E

U

 

RISKS

 

 

 

 

 

 

B E

TO COMPLY

 

 

 

 

 

 

 

 

 

A D

F O

 

 

 

 

 

 

 

 

 

 

 

FAILURE

 

 

 

 

 

 

 

 

 

 

 

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION OF

CANADA LTD.

280 INDUSTRIAL PARKWAY SOUTH

AURORA, ONTARIO L4G 3T9

PHONE: (905) 841-2866 FAX: (905) 841-2775

10690.7000 1/99 ©1993 Bunn-O-Matic Corporation

INTRODUCTION

This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured for either pour-over or automatic brewing. The automatic version may include a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter or shelf.

WARRANTY

Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation. In addition:

1.) Bunn warrants electronic circuit and/or control boards to be commercially free from defects in material and workmanship for two years from the date of installation.

2.) Bunn warrants the compressor on refrigeration equipment to be commercially free from defects in material and workmanship for two years from the date of installation.

3.) Bunn warrants that the grinding burrs on coffee grinding equipment will grind coffee to meet original factory screen sieve analysis for three years from date of installation or for 30,000 pounds of coffee, whichever comes first.

This warranty does not apply to any equipment, component or part that was not manufactured by Bunn or that, in Bunn’s judgement, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or casualty.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of Bunn are not authorized to make modifications to this warranty or to make additional warranties that are binding on Bunn. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not be relied upon.

The Buyer shall give Bunn prompt notice of any claim to be made under this warranty by telephone at (905) 841-2866 or by writing to 280 Industrial Parkway South, Aurora, Ontario, L4G 3T9. If requested by Bunn, the Buyer shall ship the defective equipment prepaid to an authorized Bunn service location. If Bunn determines, in its sole discretion, that the equipment does not conform to the warranty, Bunn shall repair the equipment with no charge for parts during the warranty period and no charge for labor by a Bunn Authorized Service Representative during the warranty period. If Bunn determines that repair is not feasible, Bunn shall, at its sole option, replace the equipment or refund the purchase price for the equipment.

THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AS SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND.

In no event shall Bunn be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

Page 2

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.

! 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.

# 00831.7000

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 © 1988 BUNN-O-MATIC CORPORATION

# 00658.7999

Page 3

ELECTRICAL REQUIREMENTS

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

Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.

Neutral

White

 

 

 

L2 Red

WHITE

 

 

White

L2 RED

 

NEUTRAL

120V.A.C.

 

 

 

WHITE

 

L1 BLACK

 

 

Neutral

NEUTRAL

 

L1 Black

120

V.a.c

 

L1 BLACK

 

 

 

 

L1 Black

 

 

 

 

 

120V.A.C.120V.ac

208 or 240V.208A.C. or 240Vac 120V.A120V.C. .ac

Model 35 requires 3- wire, grounded service rated 120/208 or 120/240 volts ac, 20 amp, single phase, 60 Hz. Proceed as follows:

Electrical Hook-Up

CAUTION – Improper electrical installation will damage electronic components.

1.An electrician must provide electrical service as specified.

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

3.Place the heater switch at the rear of the brewer in the “OFF” lower position.

4.Remove the front panel beneath the sprayhead.

5.Feed the cord through the strain relief and connect it to the terminal block.

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.

PLUMBING REQUIREMENTS

Models CW-APS & CWT-TS:

These models are completely portable and require no attached plumbing.

Models CWT-APS, CWTF-APS, CWT-TS, CWTF-TS:

These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi from a 1/2" or larger supply line. A shut-off valve should be installed in the line before the brewer. Install a regulator in the line when pressure is greater than 90 psi to reduce it to 50 psi. The water inlet fitting is 1/4" flare.

NOTE - Bunn-O-Matic recommends 1/4" copper tubing for installations of less than 25 feet and 3/8" for more than 25 feet from the 1/2" water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.

This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA)

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

Page 4

PLUMBING REQUIREMENTS (cont.)

BE SURE TO INSTALL THE ABOVE

ASSEMBLY AS SHOWN

10165.0000D 6/93

© 1988 BUNN-O-MATIC CORPORATION

EARLY MODELS W/OUT FAUCET

Models CWT-APS, CWT-TS

1.Attach the flare fitting from the short piece of tubing on the flow control (supplied) to the water inlet fitting at the left rear of the brewer.

2.Flush the water line and securely attach it to the flare fitting on the strainer.

3.Turn on the water supply.

BE SURE TO INSTALL THE ABOVE

ASSEMBLY AS SHOWN

10447.0000C 6/93 © 1989 BUNN-O-MATIC CORPORATION

FIRST TYPE MODELS W/FAUCET

FLOW

BE SURE TO INSTALL THE ABOVE

ASSEMBLY AS SHOWN

26225.0000A 4/95 © 1995 BUNN-O-MATIC CORPORATION

SECOND TYPE MODELS W/FAUCET

Models CWTF-APS, CWTF-TS:

1.Attach the flare fitting from the short piece of tubing on the flow control (supplied) to the lower water inlet fitting at the left rear of the brewer.

2.Attach the flare fitting from the short piece of tubing on the needle valve or tee (supplied) to the upper water inlet fitting at the left rear side of the brewer.

3.Flush the water line and securely attach it to the flare fitting on the strainer or tee.

4.Turn on the water supply.

5.Place an empty vessel beneath the faucet and lift the handle until water is dispensed.

Page 5

INITIAL SET-UP

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

1.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. Models CW-APS & CW-TS:

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 CWT-APS, CWTF-APS, CWT-TS, CWTF-TS:

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. Models CW-APS & CW-TS:

Pour one pitcher of tap water into the screened area on top of the brewer. 6B. Models CWT-APS, CWTF-APS, CWT-TS, CWTF-TS:

Place the "ON/OFF" switch in the "ON" upper position, and 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 and proceed as directed:

8A. Models CW-APS & CW-TS:

The brewer is now ready for use in accordance with the coffee brewing instructions on the next page. 8B. Models CWT-APS, CWTF-APS, CWT-TS, CWTF-TS:

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.

9.If not, disconnect the brewer from the power source, remove the front panel, and adjust the brew timer dial up-or-down as required. Replace the front panel, connect the brewer to the power source, and allow the water to reheat, start, and measure another brew cycle.

10.Repeat step 9 until 64 oz water volume is achieved.

11.The brewer is now ready for use in accordance with the coffee brewing instructions on the next page.

Page 6

OPERATING CONTROLS

Models CW-APS & CW-TS:

These models function without operating controls.

Models CWT-APS, CWTF-APS, CWT-TS, CWTF-TS: ON/OFF SWITCH

Placing the "ON/OFF" switch in the "OFF" lower position stops brewing. Stopping a brew cycle after it has been started will not stop the flow of water into the funnel until the tank syphons down to its proper level. Placing the switch in the "ON" upper position supplies power to the brew station warmer and enables the brew circuit.

START SWITCH

Momentarily pressing and releasing the switch starts a brew cycle when the "ON/OFF" switch is in the "ON" upper position.

NOTE – The "ON/OFF" switch must be in the "ON" upper position to initiate and complete a brew cycle.

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 dispenser beneath the funnel.

5.Operate the brewer as directed:

5A. Models CW-APS & CW-TS:

Pour one pitcher of tap water into the screened area on top of the brewer. 5B. Models CWT-APS, CWTF-APS, CWT-TS, CWTF-TS:

Place the "ON/OFF" switch in the "ON" upper position. Momentarily press and release the start 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.

3.With the sprayhead removed, insert the deliming spring (provided) all the way into the sprayhead tube. When inserted properly, no more than two inches of spring should be visible. Saw back and forth five or six times.

NOTE – In hard water areas, this may need to be done daily. It will help prevent liming problems in the brewer and takes less than a minute.

Page 7

TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the application of external voltages may result in board failure.

Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized for more than ten minutes without a supply of water.

The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help to avoid twists and kinks in the tubing.

Make certain that all plumbing connections are sealed and electrical connections tight and isolated.

This brewer is heated at all times. Keep away from combustibles.

WARNING – • Exercise extreme caution when servicing electrical equipment.

Unplug the brewer when servicing, except when electrical tests are specified.

Follow recommended service procedures

Replace all protective shields or safety notices

PROBLEM

PROBABLE CAUSE

REMEDY

Brew cycle will not start (CWT-

1. No water

Water lines and valves to the

APS, CWTF-APS, CWT-TS,

 

brewer must be open.

CWTF-TS)

 

 

2. No power or incorrect voltage to the brewer

3.ON/OFF Switch

4.Start Switch

(A1) Check the terminal block for

120 volts across the black and white terminals on two wire 120 volt brewers.

(A2) Check the terminal block for

120 volts across the red and white terminals and the black and white terminal on three wire 120/ 240 volt brewers.

(B) Check circuit breakers or fuses.

Refer to Service - ON/OFF Switch for testing. See page 17

Refer to Service - Start Switch for testing procedures. See page 19

Page 8

TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Brew cycle will not start (cont.)

5. Timer

Refer to Service - Timer for

(CWT-APS, CWTF-APS, CWT-TS,

 

testing procedures. See page 22

CWTF-TS)

6. Solenoid Valve

Refer to Service - Solenoid Valve

 

 

 

for testing procedures. See page

 

 

18

 

7. Water strainer/flow control

(A) Direction of flow arrow must

 

(.222 GPM)

be pointing towards brewer.

 

 

(B) Remove the strainer/flow

 

 

control and check for obstruc-

 

 

tions. Clear or replace.

Water is not hot

1. Tank Heater Switch

Refer to Service - Tank Heater

 

 

Switch for testing procedures.

 

 

See page 21

2. Limit Thermostat

CAUTION - Do not eliminate or bypass limit thermostat. Use only BOM replacement part #04680.0000

Refer to Service - Limit Thermostat for testing procedures. See page 16

3.

Control Thermostat

Refer to Service - Control

 

 

Thermostat for testing

 

 

procedures. See page 15

4.

Tank Heater

Refer to Service - Tank Heater

 

 

for testing procedures. See page

 

 

19

Page 9

TROUBLESHOOTING (cont.)

PROBLEM

Inconsistent beverage level in dispenser

Consistently low beverage level in the dispenser (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS)

Spitting or excessive steaming

PROBABLE CAUSE

1.Strainer /flow control (.222 GPM) (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS)

2.Syphon System

3.Lime Build-up

CAUTION - Tank and tank components should be delimed regularly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.

4. Water Pressure (CWT-APS,

CWTF-APS, CWT-TS, CWTF-TS)

1.Timer

2.Strainer/flow Control (.222 GPM)

1. Lime Build-up CAUTION - Tank and tank

components should be delimed regularly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.

REMEDY

(A)Direction of flow arrow must be pointing towards the brewer.

(B)Remove the strainer/flow control and check for obstruction. Clear or replace.

The brewer must be level or slightly lower in front to syphon properly.

Inspect the tank assembly for excessive lime deposits. Delime as required.

The water pressure to the brewer must be at least 20 psi.

Timer dial must indicate at least two minutes and fifteen seconds.

(A)Direction of flow arrow must be pointing towards brewer.

(B)Remove the strainer/flow control and check for obstructions. Clear or replace.

Inspect tank assembly for excessive lime deposits. Delime as required.

Page 10

TROUBLESHOOTING (cont.)

PROBLEM

Spitting or excessive steaming (cont.)

Dripping from sprayhead

Water flows into tank continuously (ON/OFF Switch "ON")

Water flows into tank continuously (ON/OFF Switch "OFF")

Beverage overflows dispenser

PROBABLE CAUSE

2. Control Thermostat

1.Syphon System

2.Lime Build-up

CAUTION - Tank and tank components should be delimed regularly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.

3. Solenoid Valve (CWT-APS,

CWTF-APS, CWT-TS, CWTF-TS)

1. Timer (CWT-APS, CWTF-APS,

CWT-TS, CWTF-TS)

1. Solenoid Valve (CWT-APS,

CWTF-APS, CWT-TS, CWTF-TS)

1.Dispenser

2.Timer (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS)

3.Solenoid Valve (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS)

REMEDY

Refer to Service - Control Thermostat for testing procedures. See page 15

The brewer must be level or slightly lower in front to syphon properly.

Inspect the tank assembly for excessive lime deposits. Delime as required.

Remove the solenoid valve and clear any obstructions. Rebuild or replace the valve if necessary. See page 18

Refer to Service - Timer for testing procedures. See page 22

Remove the Solenoid Valve and clean any obstruction. Rebuild or replace the valve if necessary. See page 18

The dispenser must be completely empty before starting a brew cycle.

Refer to Service - Timer for testing procedures. See page 22

Remove the Solenoid Valve and clean any obstruction. Rebuild or replace the valve if necessary. See page 18

Page 11

TROUBLESHOOTING (cont.)

 

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Weak beverage

1. Filter Type

BUNN®

 

2.

Coffee Grind

 

 

3.

Sprayhead

 

 

4.

Funnel Loading

 

 

5.

Water Temperature

 

Dry coffee grounds remain in

1.

Funnel Loading

the funnel

 

 

Brewer is making unusal noises

1.

Solenoid

(CWT-APS, CWTF-APS, CWT-

 

 

TS, CWTF-TS)

 

 

 

2.

Plumbing Lines

 

3.

Water Supply

Page 12

TROUBLESHOOTING (cont.)

 

PROBLEM

PROBABLE CAUSE

Brewer is making unusal noises

4. Tank Heater

(cont.)(CWT-APS, CWTF-APS,

 

CWT-TS, CWTF-TS)

 

Brewer is making unusal noises

1. Tank Heater

(CW)

 

REMEDY

Remove and clean lime off the tank heater. See page 19

Remove and clean lime off the tank heater. See page 19

Page 13

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 electrical equipment should be performed only by qualified service personnel. The brewer should be unplugged when servicing, except when electrical tests are required 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 replacement of any component.

All components are accessible by the removal of the top cover and front inspection panel.

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

The front inspection panel is attached with six #6- 32 screws on APS and TS Models

 

Contents

Control Thermostat

............................................. 15

Limit Thermostat ................................................

16

ON/OFF Switch ...................................................

17

Solenoid (Inlet) ...................................................

18

Start Switch (Brew) ............................................

19

Tank Heater ........................................................

19

Tank Heater Switch .............................................

21

Timer ..................................................................

22

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

24

SERIES

CW

 

 

 

AD

Y

RE

 

 

 

NN

 

 

 

 

N

N

BU

 

 

U

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TIO

N

DECANTER

 

 

 

 

AU

 

 

 

!

C

 

DISCARD

 

 

 

 

 

IF:

 

 

 

 

CONTENTS

 

 

INJURY

 

FUNNELARE

RISKS

 

 

TO COMPLY

 

 

 

 

HOT

 

 

 

 

 

 

FAILURE

 

 

 

 

 

 

CW-APS

YLNO

RETAW

INRUOP

 

 

N

N

BUNN

 

U

 

 

B

 

 

 

 

 

 

 

 

 

 

TIO

N

DECANTER

 

 

AU

 

 

C

 

 

 

 

 

DISCARD

 

 

!

 

IF:

 

 

 

CONTENTS

 

 

INJURY

FUNNELARE

RISKS

 

TO COMPLY

 

 

 

HOT

 

 

 

 

FAILURE

 

 

 

 

SERIES

CW

 

 

 

AD

Y

RE

 

CWT-TS

Page 14

 

 

 

LY

 

 

ER

ON

 

 

 

 

 

AT

 

 

IN

W

 

UR

 

 

 

 

 

PO

 

 

 

SERVICE (cont.)

CONTROL THERMOSTAT

 

 

 

 

 

 

 

S

 

 

 

 

 

RIE

 

 

 

 

 

SE

 

 

 

 

 

 

 

CW

 

 

 

 

 

 

 

 

AD

Y

 

 

 

 

 

RE

 

 

 

 

 

 

 

2

 

 

 

 

 

 

1

 

 

 

 

 

 

5.

 

3

 

 

 

 

 

 

 

 

 

VAC120-2235P/N

MATIC-O-BUNN

MINUTES

5

4

BUNN

 

 

 

 

 

FORONLYWIRECOPPERUSE

CONNECTIONSSUPPLYPOWER

EARLY

MODELS

P1137

 

 

S

RIE

SE

 

 

CW

 

 

 

AD

Y

RE

 

 

 

 

 

 

2

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

5.

 

3

 

 

 

 

 

 

 

 

 

 

N

VAC120-2235P/N

MATIC-O-BUNN

MINUTES

5

4

 

 

N

 

 

 

 

 

B

U

 

 

 

 

 

 

 

 

 

 

CONNECTIONSSUPPLYPOWER

FORONLYWIRECOPPERUSE

LATE

MODELS

P1127

Location:

Early Models: The control thermostat is mounted on a bracket inside the hood on the right side just in front of the tank lid.

Late Models: The control thermostat is located inside the trunk on the left side of the component bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Locate the blue wire on the control thermostat.

3.Check the voltage across the blue wire on the control thermostat and the white insert on two pole 120 volt terminal block or three pole 120/ 240 volt terminal blocks with a voltmeter. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 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 the wiring diagrams and check the brewer wiring harness.

5.Locate the black wire on the control thermostat.

6.Gently remove the capillary bulb and grommet from the tank.

7.Check the voltage across the black wire of the control thermostat and the white insert on the two pole 120 volt or three pole 120/240 volt terminal block with a voltmeter when the control thermostat is turned "ON" (Fully clockwise). Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/240 volt models.

8.Disconnect the brewer from the power source.

If voltage is present as described, reinstall the capillary tube into the tank to the line 4.5" above the bulb, the control thermostat is operating properly.

If voltage is not present as described, replace the thermostat.

Removal and Replacement:

1.Remove wires from control thermostat leads.

2.Remove the thermostat capillary bulb by firmlypulling-up on the capillary at the tank lid. This will disengage the grommet from the tank lid.

Page 15

SERVICE (cont.)

CONTROL THERMOSTAT (cont.)

3.Early Models: Remove the two #8-32 screws securing control thermostat bracket mounted inside the hood.

Late Models: Remove the one #8-32 screw securing the control thermostat to the component bracket in the trunk.

4.Slide the grommet to the line 4.5" above the bulb on the new capillary tube.

5.Insert the capillary bulb through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid.

6.Carefully bend the capillary tube so that the tube and bulb inside the tank are in the vertical position.

NOTE - The capillary tube must be clear of any electrical termination and not kinked.

7.Early Models: Using two #8-32 screws secure the control thermostat inside the hood.

Late Models. Using one #8-32 screw secure the control thermostat to the component bracket inside the trunk.

8.Refer to the illustration below when reconnecting the wires.

9.Adjust the control thermostat as required.

BLU to BLU Lead from

Limit Thermostat

BLK to BLK Lead fromTank Heater (Brewers W/Out Faucet)

BLK toThermal Cut-Off from Tank Heater (Brewers with Faucet)

P1129

LIMIT THERMOSTAT

S

IE

R

E

S

W

C

Y

READ

 

VAC120-2235P/N

MATIC-O-BUNN

MINUTES

5

4

 

 

N

N

 

 

 

 

 

 

B

U

 

 

 

 

 

 

 

 

 

 

 

CONNECTIONSSUPPLYPOWER

FORONLYWIRECOPPERUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1130

Location:

The limit thermostat is located inside the rear of the hood on the tank lid.

Test Procedures:

1.Disconnect the brewer from the power source.

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

3.Check for continuity across the limit thermostat terminals with a ohmmeter.

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

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

Removal and Replacement:

1.Remove all wires from limit thermostat terminals.

2.Carefully slide the limit thermostat out from under the retaining clip and remove limit thermostat.

3.Carefully slide the new limit thermostat into the retaining clip.

4.Refer to the illustration below when reconnecting the wires.

BLU to BLU Lead from

Control Thermostat

BLK to Tank

Heater Switch

P1130

Page 16

SERVICE (cont.)

If continuity is not present as described, replace the

ON/OFF SWITCH

switch.

 

BUNN

 

 

CAUTIONDISC

NTER

 

 

 

ARD

DECA

 

 

!

IF:

 

 

 

 

 

ENTS

 

NUAL

 

ONT

G MAT

 

 

 

ATIN

D C

 

 

NNERLECHOT

E OPHEIRS PRO

INJURY

FU

A

ENTISRING T

RISKS

 

 

 

THERE UCOMPLY

 

 

 

READBEFO

TO

 

 

 

 

FAILURE

 

 

 

 

P-150

Location:

The ON/OFF switch is located on the left front of the hood.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Viewing the switch from the back remove the white wire from the upper terminal and the black wire from the center terminal.

3.Check the voltage across the white wire and the black wire with a voltmeter. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/240 volt models.

4.Disconnect the brewer from the power source.

If voltage is present as described, reconnect the white and proceed to #5.

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

5.With the black wire removed, remove the white/ red wire from the lower terminal.

6.Check for continuity across the center and lower terminal with the switch in the "ON" position. Continuity must not be present when the switch is in the "OFF" position.

If continuity is present as described, reconnect the black wire to the center terminal and the white/red to the lower terminal.

Removal and Replacement:

1.Remove the wires from the switch terminals.

2.Compress the clips inside the hood and gently push the switch through the opening.

3.Push the new switch into the opening and spread the clips to hold switch in the hood.

4.Refer to the illustration below when reconnecting the wires.

P1131CAN

Page 17

WHI to Terminal Block

SERVICE (cont.)

SOLENOID VALVE

 

 

S

RIE

SE

 

 

CW

 

 

 

AD

Y

RE

 

 

 

 

 

 

2

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

5.

 

3

 

 

 

 

 

 

 

 

 

 

N

VAC120-2235P/N

MATIC-O-BUNN

MINUTES

5

4

 

 

N

 

U

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

CONNECTIONSSUPPLYPOWER

FORONLYWIRECOPPERUSE

P1127

Location:

The solenoid valve is located inside the trunk on the center lower part of the component bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the white and black wires from the solenoid valve. With the "ON/OFF" switch in the "ON" upper position press the start switch.

3.Check the voltage across the white and black wires with a voltmeter. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 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 solenoid valve coil terminals.

If continuity is present as described, reconnect the white and black wire from the timer.

If continuity is not present as described, replace the solenoid valve.

6.Check the solenoid 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 solenoid 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 solenoid valve, there may be a blockage in the water line before the solenoid 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 solenoid valve.

Removal and Replacement:

1.Remove the white and black from the solenoid valve.

2.Turn-off the water supply to the brewer.

3.Disconnect the water lines to and from the solenoid valve.

4.Remove the two #8-32 screws securing the solenoid mounting bracket to the component bracket. Remove solenoid bracket and solenoid valve as an assembly.

5.Remove the two #10-32 screws and lockwashers securing the solenoid valve to the solenoid bracket.

6.Using two #10-32 screws and lockwashers install new solenoid valve on solenoid mounting bracket.

7.Using two #8-32 screws install solenoid valve and bracket to the component bracket.

8.Securely fasten the water lines to and from the solenoid valve.

P1132

Page 18

SERVICE (cont.)

START SWITCH

 

 

 

N

N

 

 

U

 

 

B

 

 

 

 

 

 

 

 

 

CAUTIONCA

ER

 

 

 

 

 

 

RD DECANT

 

!

 

DIS

 

 

 

 

IF:

 

 

 

 

 

 

NUAL

 

 

NTS

G MAT

 

 

 

NTE

ATIN

DUC

RY

EL COHOT

PER PRO

INJU

 

FUNNARE

 

ENTISRIENGOTLYHISRISKS

 

 

THERE UCOMP

 

 

 

READBEFROE TO

 

 

 

FAILU

 

 

 

 

 

P-150

Location:

The start switch is located in the front of the hood just to the right of center.

Test Procedure:

1.Disconnect the brewer from the power supply.

2.Disconnect the blue wire from the top switch terminal and the white/red from the bottom switch terminal.

3.Check for continuity across the two terminals on the switch when it is held in the lower position. Continuity must not be present across these terminals in the upper position.

If continuity is present as described, reconnect the blue wire to the top terminal and the white/red to the bottom terminal.

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

Removal and Replacement:

1.Remove the blue wire and white/red from the start switch.

2.Compress the clips inside the hood and gently push the switch through the opening.

3.Push new switch into the opening and spread the clips to hold the start switch in the hood.

4.Refer to the following illustration when reconnecting the wires.

BLU to BLU Lead from Timer P1

WHI/RED to ON/OFF

Switch

P1133

TANK HEATER

VAC120

MATIC

5

CONNECTIONSSUPPLYPOWER

FORONLYWIRECOPPERUSE

P1127

Location:

The tank heater is located inside the tank and secured to the tank lid.

Test Procedures:

1.Disconnect the brewer from the power supply.

2.Check the voltage across the black and white wires on 120 volt models or the black and red wires for 120/240 volt models, with a voltmeter. Connect the brew to the power source. The indication must be:

a)120 volts ac for two wire 120 volt 15 and 20 amp models .

b)240 volts ac for three wire 120/240 volt mod-

els.

Page 19

SERVICE (cont.)

TANK HEATER (Cont.)

If voltage is present as described, proceed to #4

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

4.Disconnect the black wire and the white wire or red wire from the tank heater terminals.

5.Check for continuity across the 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.

11.Install tank lid with limit thermostat, sprayhead tube, tank heater, coil assembly (brewers with faucet) and control thermostat with bracket (early brewers only) using eight #8-32 hex nut.

12.Reconnect the inlet and outlet water lines to the faucet coil assembly.

13.Secure spayhead tube to hood using a hex nut.

14.Install sprayhead.

15.Reconnect the wires to the limit thermostat, tank heater and control thermostat. See limit thermostat and control thermostat sections in this manual when reconnecting wires.

16.Install fill basin, secure with tank inlet fitting and gasket. Insert water supply line through grommet in fill basin.

17.Refer to the illustration below when reconnecting the tank heater wires.

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

Removal and Replacement:

1.Disconnect the water supply tube from the fill basin.

2.Remove the tank inlet fitting securing the fill basin to the tank lid, remove fill basin and tank

inlet gasket. Set all three parts aside for reassem-

WHI to Terminal Block

BLK to Control Thermostat

bly.

(White Insert on 120V

(Brewers W/Out Faucet)

3. On brewers with faucet shut-off water supply to

Two Wire Models)

BLK to Fuse (Brewers W/Faucet)

the brewer and disconnect the inlet and outlet

Red to Terminal Block

 

(Red Insert on 120/240V

 

water lines to the faucet coil assembly.

Three Wire Models)

 

4.Disconnect the black wire on the limit thermostat from the tank heater switch. On late model brewers also disconnect the blue wire from the limit thermostat to the control thermostat.

5.Disconnect the black wire and the white or red wire from the tank heater terminals.

6.Remove sprayhead and the hex nut securing the sprayhead tube to the hood. Set aside for reassembly.

7.Remove the eight #8-32 nuts securing the tank

lid to the tank.

P1134CAN

 

8.Remove the tank lid with limit thermostat, sprayhead tube, tank heater, coil assembly and control thermostat w/bracket (early models only).

9Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets and discard.

10.Install new tank heater with gaskets on the tank lid and secure with two hex nuts.

Page 20

SERVICE (cont.)

TANK HEATER SWITCH

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

5.

 

3

 

 

 

 

 

 

 

 

 

 

 

N

 

VAC120-2235P/N

MATIC-O-BUNN

MINUTES

 

 

 

 

N

 

 

 

 

U

 

 

 

4

B

 

 

 

5

 

 

 

 

 

 

 

 

CONNECTIONSSUPPLYPOWER

FORONLYWIRECOPPERUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1127

Location:

The tank heater switch is located on the rear of the brewer on the upper left side of the trunk.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Disconnect the black wire from the limit thermostat.

3.With the tank heater switch in the "ON" position check the voltage between the black wire removed from the limit thermostat and the white wire or red wire on the tank heater with a voltmeter. Connect the brewer to the power source. The indication must be:

a)120V volts ac on two wire 120 volt models.

b)240 volts ac on three wire 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 the Wiring Diagrams and check the brewer wiring harness.

5.Check for continuity between the black wire removed from the limit thermostat and the black insert on the terminal block with the tank heater switch in the "ON" upper position. Continuity

should not be present in the "OFF" lower position.

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

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

Removal and Replacement:

1.Shut-off and disconnect the incoming water sup-

ply to the brewer.

1.On automatic brewers gently remove the fill tube from back of fill basin.

2.Remove the tank inlet fitting securing fill basin the tank lid. Remove fill basin and gasket. Set all three parts aside for reassembly.

3.On brewers with faucets, disconnect the water supply to coil assembly and remove the tube from the tank to the faucet.

4.Remove sprayhead and hex nut securing sprayhead tube to the hood. Set aside for reassembly.

5.Disconnect the wires on the limit thermostat and the tank heater and the control thermostat (early models).

6.Gently pull the thermostat sensor and grommet from the tank lid.

7.Insert a tube to the bottom of the tank and syphon ALL of the water out. (BUNN-O-MATIC has #12440 syphon assembly available for this purpose.

8.Gently reinstall the thermostat sensor and grommet in the tank lid.

9.Remove the two #8-32 screws securing the tank assembly to the hood.

10.Lift tank and components out as an assembly and set aside for reassembly.

11.Disconnect the two black wires from the tank heater switch.

12.Remove the plastic facenut, hex facenut and the switch indicator/guard bracket that secures tank heater switch to the rear of the brewer. Remove switch and discard.

13.Insert new tank heater switch through the hole in the upper left rear of the trunk and secure with switch indicator/guard bracket, hex facenut and plastic facenut.

14.Reconnect the two black wires the tank heater switch terminals.

Page 21

SERVICE (cont.)

TIMER

TANK HEATER SWITCH (cont.)

15.Set tank assembly inside the hood on mounting brackets and secure with two #8-32 screws.

16.Reconnect the wires to the limit thermostat, tank heater and the control thermostat. Refer to limit thermostat, tank heater and control thermostat sections in this manual when reconnecting wires.

17.Brewers with faucet reinstall the faucet tube and reconnect the water supply tube to the coil assembly.

18.Secure the sprayhead tube to the hood using hex nut.

19.Install sprayhead.

20.Install fill basin, inlet gasket and secure to tank lid with tank inlet fitting.

21.Carefully install water fill tube into the back of the fill basin.

22.Reconnect and turn on the incoming water supply.

23.Refer to the illustration below when reconnecting the wires.

BLK to Limit Thermostat

BLK to Terminal Block (Black Insert)

P1135

3

Page 22

LT12UREADYe

s

t

SERVICE (cont.)

TIMER (cont.)

with a voltmeter when the "ON/OFF" switch is in the "ON" position (upper) and start switch pressed. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/240 volt models.

6.Disconnect the brewer from the power source.

7.Reconnect the three pin connector from main wiring harness to the timer.

If voltage is present as described, proceed to #8

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

8.Disconnect on black and white wires to the solenoid.

9.Check the voltage across the black and white wires with a voltmeter when the "ON/OFF" switch is in the "ON" position (upper) and the "START" switch is pressed to the "START" position (lower) and released. Connect the brewer to the power source. The indication must be 120 volts ac for approximately 20 seconds for two wire 120 volt models and three wire 120/240 volt models.

If voltage is present as described, the brew timer is operating properly. Reset the timer dial as required, to obtain the desired brew volume.

If voltage is not present as described, replace the timer.

Removal and Replacement:

1.Disconnect the timer socket from the brewer wiring harness and the timer leads from the solenoid valve.

2.Remove the one #8-32 screw securing timer to component bracket.

3Install new timer on component bracket securing with one #8-32 screw.

4.Refer to the illustration below when reconnecting the wires.

5.Readjust the timer dial as required.

 

 

 

 

2

 

 

 

 

1

 

 

 

5.

3

 

 

 

 

VAC120-2235P/N

MATIC-O-BUNN

MINUTES

5

4

To Main Wiring Harness

WHI to Solenoid Valve

BLK to Solenoid Valve

P1136

Page 23

 

SCHEMATIC WIRING DIAGRAM FOR CW, CWT, CWTF, CWTF-APS, TS

 

SCHEMATIC WIRING DIAGRAM FOR CW, CWT, CWTF - APS,

L1

TS,TSR

 

 

N

L2

 

 

 

 

 

 

 

READY INDICATOR

GREEN

 

 

 

 

READY INDICATOR

 

 

 

 

 

 

 

 

 

 

 

 

BLU

BLK

(FAUCET

 

 

 

 

 

 

BLU

BLK

 

 

 

HEATER

 

 

SW. &THERMOSTAT

(FAUCETOPTIONOPTIONONLY)

 

 

 

L I M I T

 

THERMAL

 

 

 

HEATERSWITCH

 

 

 

 

SWITCH

LIMITTHERMOSTAT

 

 

 

FUSE

 

 

 

 

 

 

FUSE

 

WHI

15 & 20)

BLK

THERMOSTAT

 

 

BLK

TANK HEATER

BLK

 

 

 

 

WHI (MODELS 15 & 20)

BLK

BLK

BLU

 

 

BLK

BLK

TANK

 

 

 

 

 

RED(MODEL 35)

 

 

 

 

 

 

 

 

RED (MODEL 35)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODEL 15 1320W @ 120V

@ 120V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODELS CW15, CWT15, CWTF15, 1150W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50W

MODELSMODELCW20,20CWT20,1800WCWTF20,@ 120V1450W

@ 120V

 

 

 

 

 

 

 

 

 

 

 

WHI

MODEL 35 3500W @ 240V

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODELS CW35, CWT35, CWTF35, 3500W

@ 240V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODELS CW15-TS, CW20-TS, CW15-APS, CW20-APS,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW. & THERMOSTAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"KEEP WARM" HEATERCWT15-TS, CWT20-TS, CWT15-APS, CWT20-APS,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUXILIARY OUTLET

 

 

 

 

 

 

 

 

 

 

BLK

CWTF15-TS, CWTF20-TS, CWTF15-APS, CWTF20-APS, 1450W @ 120V

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODELS CWT35-TS, CWTF35-TS,

CWT35-APS,

 

CWTF35-APS, 3500W @ 240v

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL AUTOMATIC BREW CIRCUIT

 

 

 

 

 

(200 WATT MAXIMUM)

 

 

 

 

 

 

 

 

 

 

OPTIONAL AUTOMATIC BREW CIRCUIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON/OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON/OFF SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

START

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

WHI/RED

BLU

P1

BLU

 

 

BLK

WHI/RED

BLU

 

 

WHI

 

 

P3

 

BLK

SOL

 

WHI/RED

BLK

BLK

WHI

 

WHI/RED

 

 

 

 

P1, P2, &

PINS OF A

 

 

 

 

 

 

 

P1, P2, & P3 ARE PINS OF A

 

BREW

 

 

 

P2

 

POLARIZEDTHREE-PIN

 

 

 

WHI

P2

WHI

POLARIZED THREE-PIN

 

TIMER

 

 

 

 

 

 

 

 

 

CONNECTOR

 

TIMER

 

 

 

 

 

CONNECTOR.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120/240 VOLTS AC 3 WIRE

 

 

120/240

3 WIRE

 

 

120

2 WIRE

10693.0000C 9/96 © 1993 BUNN-O-MATIC CORPORATION

 

120 VOLTS AC 2 WIRE

SINGLE PHASE

SINGLE PHASE

Page 24