Bunn TWF, TW User Manual

1.19 Mb

BUNN® TW

TWF

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

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

10510.0000 11/00 © 1990 Bunn-O-Matic Corporation

CONTENTS

 

Introduction .............................................................

2

Warranty ..................................................................

2

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

3

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

4

Plumbing Requirements ..........................................

4

Initial Set-Up ............................................................

5

Adjusting Brew Controls ..........................................

6

Cleaning ...................................................................

6

Operating Controls...................................................

7

Tea Brewing .............................................................

7

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

8

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

14

Wiring Diagram .....................................................

31

INTRODUCTION

This equipment will brew a half-gallon batch of hot coffee into an airpot server or dispenser and a threegallon batch of fresh tea into a dispenser and dispense at approximately room temperature to conserve ice. The brewer 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 (217) 529-6601 or by writing to Post Office Box 3227, Springfield, Illinois, 62708-3227. 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.

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#00831.0000

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E©ut1i/09Bu©

#00656.0000

ELECTRICAL REQUIREMENTS

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

120V model brewers require 2-wire, grounded service rated 120 volt ac, 15 amp, single phase, 60 Hz.

120/208V model brewers require 3-wire, grounded service rated 120/ 208 volt, 20 amp, single phase, 60 Hz.

L2 RED

 

WHITE

120V.A.C.

208V.A.C.

 

NEUTRAL

120V.A.C.

L1 BLACK

 

Electrical Hook-Up

CAUTION – Improper electrical installation will damage electronic components.

1.An electrician must provide electrical service as specified.

2.Remove the top lid and rotate the control thermostat knob fully counterclockwise to the "OFF" position.

3.a) 120V brewers have an attached cordset. Plug in the brewer and proceed to #6.

b) 120/208V brewers, feed the cord through the strain relief at the rear of the brewer and connect it to the terminal block.

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

5.Connect the brewer to the power source and verify the voltage at the terminal block.

6.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

These brewers must be connected to a cold water system with operating pressure between 20 (128) and 90 psi (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 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.

1.Remove the shipping cap(s) from the bulkhead fitting(s) on the rear of the brewer.

2.Attach the flare fitting from the short piece of tubing on the strainer/flow control (supplied) to the water inlet fitting(s) at the rear of the brewer.

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

4.Turn on the water supply.

5.On brewers with a faucet, place an empty vessel beneath the faucet and lift the handle until water is dispensed.

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).

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PLUMBING REQUIREMENTS (cont.)

BREWERS W/OUT FAUCET

BREWERS W/FAUCET

 

INITIAL SET-UP

CAUTION – The brewer must be unplugged throughout the initial set-up, except when specified in the instructions.

1.Remove the top lid from the brewer.

2.Rotate the control thermostat knob fully counterclockwise to the “OFF” position and replace the top lid.

3.Insert the funnel (empty) into the funnel rails.

4.Place an empty tea dispenser on the brewer base. Be prepared to empty the dispenser a few times.

5.Plug in the brewer, place the TEA/OFF/COFFEE switch in the “COFFEE” position, and momentarily press the start switch. When the flow of water into the tank stops, press the START switch to initiate a second cycle. Wait until the flow of water stops and start a third cycle. During the third cycle, the tank will fill to its capacity and the excess will flow from the funnel into the dispenser. Empty the dispenser when this third cycle stops.

6.Place the TEA/OFF/COFFEE switch in the “TEA” position and begin another brew cycle.

7.Measure the total water volume from the dispenser. It should be approximately (396 ounces.)

8.If not, adjust the Iced Tea Brew Timer (right timer) as required. (See Adjusting Brew Volume)

9.Start, and measure another cycle.

10.Repeat steps 7-9 until the recommended total water volume (396 ounces) is achieved.

11.The concentrate valve is pre-adjusted to deliver the correct ratio of brew water to dilution water.

12.Unplug the brewer, remove the top lid, rotate the control thermostat knob fully clockwise to the “ON” position and replace the top lid.

13.Empty the dispenser.

14.Plug in the brewer and wait for the water in the tank to heat to brewing temperature (approximately 20 minutes). Some water will drip from the funnel during this time; this is due to expansion and should not occur thereafter.

15.Place the TEA/OFF/COFFEE switch in the “COFFEE” position and begin another brew cycle. Empty the reservoir after water has stopped flowing from the funnel.

16.Allow the water in the tank to heat to the proper temperature and begin another brew cycle.

17.Measure the total water volume from the dispenser. It should be approximately 64 ounces.

18.If not, adjust the Coffee Brew Timer (left timer) as required. (See Adjusting Brew Volume)

19.Start, and measure another cycle.

20.Repeat steps 17-19 until the recommended total water volume (64 ounces) is achieved.

21The brewer is now ready to brew approximately one-half gallon of hot coffee or 3-gallons of freshly brewed room temperature tea.

Page 5

INITIAL SET-UP (cont.)

ADJUSTING BREW VOLUMES

CAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacement or adjustment of any component.

NOTE: Prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place.

1.Modifying batch sizes. To modify a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board.

To increase a batch size. Press and hold the START or BREW switch until three clicks are heard. Release the switch (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory) and press it again one or more times. Each time the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

To decrease a batch size. Press and release the START or BREW switch once for every two-second interval to be removed from the total brew time period; then immediately press and hold down the START or BREW switch until three clicks are heard. Release the switch. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory). Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

2.Setting batch sizes. To set a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. Press and hold the START or BREW switch until three distinct clicks are heard, and then release the switch. (Failure to release the switch within two seconds after the third click causes the volume

setting to be aborted and previous volume setting will remain in memory). View the level of the liquid being dispensed. When the desired level is reached, turn the ON/OFF switch to “OFF” (lower). The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated.

NOTE: When brewing coffee, batch volumes will decrease due to absorption by the coffee grounds.

3.Setting programming disable feature. If it becomes necessary to prevent anyone from changing brew times once programmed, you can set the SET/LOCK switch to the “LOCK” position. This will prevent any programming to be done until switch is once again placed in the “SET” position.

CLEANING

CAUTION – Do not keep brewed tea overnight. Clean and sanitize your iced tea dispenser daily

1.Remove and thoroughly clean the brew funnel. The funnel tip and screen must be free from any tea particles or residue. Reassemble the funnel.

2.Unplug the brewer. Remove and thoroughly rinse the sprayhead. The holes must be open and clear of any mineral deposits. Wipe the sprayhead panel clean with a damp cloth.

3.Insert the deliming spring into the sprayhead fitting until no more than one inch is visible and move it in and out 5 or 6 times. Insert the spring into the airvent hole in the sprayhead panel and move it in and out 5 or 6 times. Reattach the sprayhead.

4.Wash the entire outside surface of the brewer with a clean damp cloth.

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OPERATING CONTROLS

A. TEA/OFF/COFFEE Switch

TEA– Placing the switch in the left position allows the start switch to activate a timed brew cycle delivering .5 gallon of tea concentrate and 2.5 gallons of dilution water into the dispenser.

OFF – Placing the switch in the center position stops the brew cycle. Stopping a brew cycle after it has started will not stop the flow of water into the funnel until the tank syphons down to its level. The switch should always be placed in this position after a brew cycle and whenever the brewer is unattended.

COFFEE– Placing the switch in the right position allows the start switch to activate a timed brew cycle delivering

.5 gallon of hot coffee into an airpot dispenser. B. Start Switch

Starts a brew cycle when the TEA/OFF/COFFEE switch is in either the “TEA” or “COFFEE” position.

BREWING

1.Begin brewing with a clean empty brew funnel and dispenser. (Be sure the server lid doesn't interfere with the flow of dilution water)

2.Insert a BUNN® filter into the funnel.

3.Pour the packet of fresh tea leaves or coffee into the filter. Approximately 4 ounces is recommended for tea.

4.Level the bed of tea leaves or coffee by gently shaking.

5.Slide the funnel into the funnel rails until it stops.

6.Place the TEA/OFF/COFFEE switch in the desired position.

7.Momentarily press the start switch.

CAUTION – The funnel contains hot liquid. Remove funnel slowly.

8.Carefully remove the brew funnel and discard its contents after liquid stops flowing from the funnel.

9.Place the TEA/OFF/COFFEE switch in the “OFF” position to prevent a false start.

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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

Problem

Probable Cause

Remedy

Brew cycle(s) will not start

1. No water

Water lines and valves to the brewer

 

 

 

must be open.

 

2. No power or incorrect voltage to

Check circuit breakers or fuses.

 

the brewer

 

 

3.

External Strainer/ Flow Control

(A) Direction of flow arrow must be

 

(.750 GPM)

pointing towards the brewer.

 

 

 

(B) Remove the strainer/flow con-

 

 

 

trol and check for obstructions.

 

 

 

Clear or replace.

 

4.

TEA/OFF/COFFEE Switch

Refer to Service - TEA/OFF/COFFEE

 

 

 

Switch for testing. See page 26

 

5.

Start Switch

Refer to Service - Start Switch for

 

 

 

testing procedures. See page 27

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TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Brew cycle(s) will not start (cont.)

6. Brew Timer

Refer to Service - Brew Timer (Iced

 

A) Iced Tea

 

 

Tea) for testing procedures. See

 

 

page 20 or 21

 

B) Hot Coffee

Refer to Service - Brew Timer (Hot

 

 

Coffee) for testing procedures. See

 

 

page 17 or 18

 

7. Brew Solenoid Valve

Refer to Service - Brew Solenoid

 

A) Iced Tea

Valve (Iced Tea) for testing proce-

 

 

dures. See page 16

 

B) Hot Coffee

Refer to Service- Brew Solenoid

 

 

Valve (Hot Coffee) for testing pro-

 

 

cedures. See page 15

8. Internal Flow control (.195 GPM) (Hot Coffee Only)

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

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

Brew water is not hot

1. Limit Thermostat

 

Refer to Service - Limit Thermostat

 

CAUTION - Do not eliminate or by-

for testing procedures. See page 25

 

pass limit thermostat. Use only

 

 

BOM

replacement

part

 

#29329.1000

2. Thermal Fuse

CAUTION - Do not eliminate or bypass thermal fuse.

3. Control Thermostat

Refer to Service - Thermal fuse for testing procedures. See page 29

Refer to Service - Control Thermostat for testing procedures. See page 23

 

4.

Tank Heater

Refer to Service - Tank Heater for

 

 

 

testing procedures. See page 28

Dilution (Iced Tea) cycle will not

1.

TEA/OFF/COFFEE Switch

Refer to Service - TEA/OFF/COFFEE

start

 

 

Switch for testing procedures. See

 

 

 

page 26

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TROUBLESHOOTING (cont.)

 

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Dilution (Iced Tea) cycle will not

2. Start Switch

Refer to Service - Start Switch for

start (cont.)

 

 

testing procedures. See page 27

 

3.

Brew Timer (Iced Tea)

Refer to Service- Brew Timer (Iced

 

 

 

Tea) for testing procedures. See

 

 

 

page 20 or 21

 

4.

Brew Solenoid Valve (Iced Tea)

Refer to Service - Brew Solenoid

 

 

 

Valve (Iced Tea) for testing proce-

 

 

 

dures. See page 16

 

5.

Dilution Solenoid Valve

Refer to Service - Dilution Solenoid

 

 

 

Valve for testing procedures. See

 

 

 

page 24

Inconsistent beverage level in dispenser (Hot Coffee)

1. Internal Flow Control (.195 GPM)

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.

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

(B)Remove the 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.

 

4.

Water Pressure

The water pressure to the brewer

 

 

 

must be at least 20 psi (128 kPa).

Consistently high or low beverage

1.

Brew Timer

With the TEA/OFF/COFFEE switch in

level in the dispenser

 

 

the "TEA" position adjust the needle

 

 

 

valve to achieve the recommended

 

 

 

76 oz of concentrate then the timer

to achieve a total of 396 oz for each three-gallon brew cycle.

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TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Consistently high or low beverage

2. External Strainer/Flow Control

(A) Direction of flow arrow must be

level in the dispenser. (cont.)

(.750 GPM)

pointing towards brewer.

 

 

(B) Remove the strainer/flow con-

 

 

trol and check for obstructions.

 

 

Clear or replace.

Spitting or excessive steaming

1. Lime Build-up

 

CAUTION - Tank and tank compo-

 

nents should be delimed regularly

 

depending on local water condi-

 

tions. Excessive mineral build-up

 

on stainless steel surfaces can ini-

 

tiate corrosive reactions resulting

 

in serious leaks.

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

 

2.

Control Thermostat

Refer to Service - Control Thermo-

 

 

 

stat for testing procedures. See

 

 

 

page 23

Drip-out time too long

1.

Funnel Tip

The brew funnel should be cleaned

 

 

 

thoroughly before each brew cycle

 

 

 

to lessen the chance of tea leaf par-

 

 

 

ticles clogging the drip-out tip.

Dripping from sprayhead

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.

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

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

3. Brew Solenoid Valve

Refer to Service - Brew Solenoid

A) Iced Tea

Valve (Iced Tea) for testing proce-

 

dures. See page 16

B) Hot Coffee

Refer to Service- Brew Solenoid

 

Valve (Hot Coffee) for testing pro-

 

cedures. See Page 15

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TROUBLESHOOTING (cont.)

 

PROBLEM

PROBABLE CAUSE

Water flows into tank continuously (TEA/OFF/COFFEE Switch in the "TEA or "COFFEE" position)

Water flows into tank continuously (TEA/OFF/COFFEE Switch in the "OFF" position)

Beverage overflows dispenser

1.Brew Timer

A)Iced Tea

B)Hot Coffee

1.Brew Solenoid Valve

A)Iced Tea

B)Hot Coffee

1.Dispenser

2.Brew Timer

A)Iced Tea

B)Hot Coffee

3.Brew Solenoid Valve

A)Iced Tea

B)Hot Coffee

4.Dilution Solenoid Valve

REMEDY

Refer to Service - Brew Timer (Iced Tea) for testing procedures. See page 20 or 21

Refer to Service- Brew Timer (Hot Coffee) for testing procedures. See page 17 or 18

Refer to Service - Brew Solenoid Valve (Iced Tea) for testing procedures. See page 16

Refer to Service- Brew Solenoid Valve (Hot Coffee) for testing procedures. See page 15

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

Refer to Service - Brew Timer (Iced Tea) for testing procedures. See page 20 or 21

Refer to Service- Brew Timer (Hot Coffee) for testing procedures. See page 17 or 18

Remove the Iced Tea Brew Solenoid Valve and clean any obstruction. Rebuild or replace the valve if necessary. See page 16

Remove the Hot Coffee Brew Solenoid Valve and clean any obstruction. Rebuild or replace the valve if necessary. See page 15

Refer to Service - Dilution Solenoid Valve for testing procedures. See page 24

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TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

Weak beverage

1.

Filter Type

 

2.

Tea or Coffee

REMEDY

BUNN® paper filters must be used for proper extraction.

A sufficient quantity of fresh tea leaves or coffee should be used for proper extraction.

 

3. Sprayhead

A six-hole (or seven-hole for Mod-

 

 

els with 90 oz concentrate option)

 

 

stainless steel sprayhead must be

 

 

used for proper extraction.

 

4. Funnel Loading

The BUNN® paper filter must be cen-

 

 

tered in the funnel and the bed of tea

 

 

leaves leveled by gentle shaking.

 

5. Water Temperature

Place an empty funnel on an empty

 

 

dispenser beneath the sprayhead. Ini-

 

 

tiate a brew cycle and check the wa-

 

 

ter temperature immediately below

 

 

the sprayhead with a thermometer.

 

 

The reading should not be less than

 

 

200°F(93°C). Adjust the control ther-

 

 

mostat to increase the water tempera-

 

 

ture. Replace if necessary.

Dry tea leaves remain in the funnel

1. Funnel Loading

The BUNN® paper filter must be cen-

 

 

tered in the funnel and the bed of

 

 

grounds leveled by gently shaking.

Brewer is making unusual noises

1. Solenoid(s)

The nut on the solenoid(s) must be

 

 

tight or it will vibrate during opera-

 

 

tion.

 

2. Plumbing Lines

Plumbing lines should not be rest-

 

 

ing on the counter top.

 

3. Water Supply

(A) The brewer must be connected

 

 

to a cold water line.

 

 

(B) Water pressure to the brewer

 

 

must not exceed 90 psi(620 kPa).

 

 

Install a regulator if necessary to

 

 

lower the working pressure to ap-

 

 

proximately 50 psi(345 kPa).

 

4. Tank Heater

Remove and clean lime off the tank

 

 

heater. See page 28

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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 disconnected from the power source 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 rear inspection panel.

The top cover is attached with four #6-32 screws. Removal of the top cover will allow access to TEA/OFF/ COFFEE switch, start switch, brew timers, control thermostat, limit thermostat, thermal fuse and tank heater.

The rear inspection panel is attached with six #8- 32 screws. Remove of the rear panel will allow access to the brew solenoid valves and the dilution solenoid valve .195 GPM flow control and check valve.

Contents

P1959.60

FIG. 1 COMPONENT ACCESS

Brew Solenoid Valve (Hot Coffee) .......................

15

 

 

Brew Solenoid Valve (Iced Tea) ..........................

16

 

 

Brew Timer (Hot CoffeeEarly Models) ..............

17

 

 

Digital Brew Timer (Hot Coffee-Late Models) .....

18

 

 

Brew Timer (Iced Tea - Early Models) .................

20

 

 

Digital Brew Timer (Iced Tea-Late Models) .........

21

 

 

Control Thermostat .............................................

23

 

 

Dilution Solenoid Valve .......................................

24

 

 

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

25

 

 

TEA/OFF/COFFEE Switch .....................................

26

 

 

Start Switch ........................................................

27

 

 

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

28

 

 

Thermal Fuse ......................................................

29

 

 

Half Batch Switch (Optional) ...............................

30

 

 

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

31

 

 

 

Page 14

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SERVICE (cont.)

If continuity is not present as described, replace the

BREW SOLENOID VALVE (HOT COFFEE)

solenoid valve.

 

 

6.

Check the hot coffee solenoid valve for coil ac-

 

 

 

tion. Connect the brewer to the power source. With

 

 

 

TEA/OFF/COFFEE switch in the "COFFEE" position

 

 

 

press the 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 block-

 

 

age 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.

 

P2198.50

Removal and Replacement:

 

FIG. 2 HOT COFFEE BREW SOLENOID VALVE

1.

Remove all wires from solenoid valves.

Location:

2.

Turn off the water supply to the brewer.

 

Viewing the brewer from the, rear the hot coffee

3.

Disconnect the water lines to and from the sole-

brew solenoid valve is mounted on the left side of the

 

noid valves.

mounting bracket.

4.

Remove the two #8-32 keps nuts holding the

 

 

 

mounting bracket to the brewer base.

Test Procedures:

5.

Lift out the bracket.

1. Disconnect the brewer from the power source.

6.

Remove the two #10-32 slotted-head screws hold-

2. Disconnect the white/red and white/green wires

 

ing the hot coffee solenoid valve to the mounting

 

from the hot coffee solenoid valve. With the TEA/

 

bracket.

 

OFF/COFFEE switch in the "COFFEE" position press

7.

Securely install the new hot coffee solenoid valve

 

the START switch.

 

to the mounting bracket.

3.

With a voltmeter, check the voltage across the

8.

Attach the mounting bracket to the brewer base.

 

white/red and white/green wires. Connect the

9.

Securely fasten the water lines to and from the

 

brewer to the power source. The indication must

 

solenoid valves.

 

be 120 volts ac for two wire 120 volt models and

10.

Refer to Fig. 3 when reconnecting the wires.

 

three wire 120/208 volt models.

 

WHI/GRN to Hot Coffee Timer TL4

4.

Disconnect the brewer from the power source.

 

WHI/RED to Hot Coffee Timer TL1

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 hot coffee sole-

HOT COFFEE

 

 

noid valve coil terminals.

BREW SOLENOID

 

 

ICED TEA BREW

 

 

 

 

 

If continuity is present as described, reconnect the

SOLENOID

 

 

 

DILUTION

 

white/red and white/green wires from the hot coffee

 

 

 

SOLENOID

P1364

brew timer.

FIG.3 SOLENOID VALVE TERMINALS

 

Page 15

10510

081599

 

 

SERVICE (cont.)

If continuity is not present as described, replace the

BREW SOLENOID VALVE (ICED TEA)

solenoid valve.

 

 

 

 

6.

Check the iced tea solenoid valve for coil action.

 

 

 

Connect the brewer to the power source. With TEA/

 

 

 

OFF/COFFEE switch in the "TEA" position press

 

 

 

the START switch and listen carefully in the vicin-

 

 

 

ity 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 block-

 

 

age 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.

 

P2198.50

Removal and Replacement:

 

 

 

 

FIG. 4 ICED TEA BREW SOLENOID VALVE

1.

Remove all wires from solenoid valves.

Location:

2.

Turn off the water supply to the brewer.

 

Viewing the brewer from the rear, the iced tea brew

3.

Disconnect the water lines to and from the sole-

solenoid valve is mounted in the center of the mount-

 

noid valves.

ing bracket.

4.

Remove the two #8-32 keps nuts holding the

 

 

 

mounting bracket to the brewer base.

Test Procedures:

5.

Lift out the bracket.

1. Disconnect the brewer from the power source.

6.

Remove the two #10-32 slotted-head screws hold-

2. Disconnect the white/violet and white/blue wires

 

ing the iced tea brew solenoid valve to the mount-

 

from the iced tea brew solenoid valve. With the

 

ing bracket.

 

TEA/OFF/COFFEE switch in the "TEA" position press

7.

Securely install the new iced tea brew solenoid

 

the START switch.

 

valve to the mounting bracket.

3.

With a voltmeter, check the voltage across the

8.

Attach the mounting bracket to the brewer base.

 

white/violet and white/blue wires. Connect the

9.

Securely fasten the water lines to and from the

 

brewer to the power source. The indication must

 

solenoid valves.

 

be 120 volts ac for two wire 120 volt models and

10.

Refer to Fig. 5 when reconnecting the wires.

 

three wire 120/208 volt models.

 

 

4. Disconnect the brewer from the power source.

 

 

If voltage is present as described, proceed to #5

WHI/BLU to Dilution

Solenoid

If voltage is not present as described, refer to Wiring

WHI/VIO to Dilution

Diagrams and check brewer wiring harness.

Solenoid

 

5. Check for continuity across the iced tea brew so-

HOT COFFEE

lenoid valve coil terminals.

BREW SOLENOID

ICED TEA BREW

 

 

SOLENOID

If continuity is present as described, reconnect the

DILUTION

white/violet and white/blue wires from the iced tea

SOLENOID

brew timer.

FIG.5 SOLENOID VALVE TERMINALS P1364

Page 16

10510 081599

 

Page 17

SERVICE (cont.)

DIGITAL BREW TIMER (HOT COFFEE -Late Models)

P2198.50

FIG. 8 DIGITAL BREW TIMER

Location:

The timer is located inside the hood on the left side.

Test Procedure.

NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board.

1.Disconnect the brewer from the power source and remove the front access panel.

2.Remove the two #8-32 screws securing circuit board to the mounting bracket.

3.Remove circuit board and spacers (as required).

4.With a voltmeter, check the voltage across terminals TL1 and TL2 when the "TEA/OFF/COFFEE" switch is in the "COFFEE" 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 volt models.

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 the brewer wiring harness.

6.With a voltmeter, check the voltage across terminals TL1 and TL4 when the "TEA/OFF/COFFEE" switch is in the "COFFEE" position. Connect the brewer to the power source. The indication must be 0 volts.

If voltage is as described, proceed to #7.

If voltage is not as described, disconnect the brewer from the power source and replace the timer.

7.With a voltmeter, check the voltage across terminals TL1 and TL4 when the "TEA/OFF/COFFEE" switch is in the "COFFEE" position. Connect the brewer to the power source and press the START switch. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/208 volt models.

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

If voltage is not present as described, disconnect the brewer from the power source and replace the timer.

Removal and Replacement:

1.Remove the two #8-32 screws securing circuit board to the mounting bracket.

2.Remove circuit board and spacers (as required).

3.Remove all wires from the timer.

4.Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 9 when reconnecting the wires.

5.Install new circuit board with spacers (as required) to the component mounting bracket.

6.Adjust the timer as described below.

Timer Setting:

NOTE: Prior to setting or modifying volumes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place. NOTE: All volume settings must be done with the sprayhead installed.

Page 18

10510

071000

 

 

SERVICE (cont.)

DIGITAL BREW TIMER (HOT COFFEE - Late

Models)(cont.)

1. Modifying brew volumes. To modify a brew volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board.

To increase a brew volume, place the TEA/OFF/ COFFEE switch in the “COFFEE” position, press and hold the START switch until three clicks are heard. Release the switch and press it again one or more times. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory.) Each time the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

To decrease a brew volume, place the TEA/OFF/ COFFEE switch in the “COFFEE” position, press and release the START switch once for every two-second interval to be removed from the total brew time period; then immediately press and hold down the START switch until three clicks are heard. Release the switch. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory). Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

2. Setting brew volumes. To set a brew volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. Place the TEA/OFF/COFFEE switch in the “COFFEE” position, press and hold the START switch until three distinct clicks are heard and then release the switch. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous vol-

ume setting will remain in memory.)

View the level of the liquid being dispensed. When the desired level is reached, turn the TEA/OFF/COFFEE switch to “OFF”.

NOTE: Several ounces of water will continue to syphon from the tank after turning the switch “OFF”. The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated.

NOTE: When brewing coffee, volume will decrease due to absorption by the coffee grounds.

3. Setting programming disable feature. If it becomes necessary to prevent anyone from changing brew time once programmed, you can set the SET/ LOCK switch to the “LOCK” position. This will prevent any further programming until switch is once again put into the “SET” position.

TL1 - WHI/RED to Hot Coffee Solenoid and WHI/RED to TEA/OFF/COFFEE Switch TL2 - WHI to Power Cord (120V Models) or

WHI to Terminal Block (120/208V Models) TL3 - WHI/ORN to START Switch

TL4 - WHI/GRN to Hot Coffee Solenoid TL5 - WHI/YEL to START Switch

P2037

FIG. 9 DIGITAL TIMER WIRING

Page 19

10510

071000

 

 

Page 20

SERVICE (cont.)

DIGITAL BREW TIMER (ICED TEA - Late Models)

P2198.50

FIG. 12 DIGITAL BREW TIMER

Location:

The timer is located inside the hood, on the right side.

Test Procedure.

NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board.

1.Disconnect the brewer from the power source and remove the front access panel.

2.Remove the two #8-32 screws securing circuit board to the hood.

3.Remove circuit board and spacers (as required).

4.With a voltmeter, check the voltage across terminals TL1 and TL2 when the "TEA/OFF/COFFEE" switch is in the "TEA" 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 volt models.

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 the brewer wiring harness.

6.With a voltmeter, check the voltage across terminals TL1 and TL4 when the "TEA/OFF/COFFEE" switch is in the "TEA" position. Connect the brewer to the power source. The indication must be 0 volts.

If voltage is as described, proceed to #7.

If voltage is not as described, disconnect the brewer from the power source and replace the timer.

7.With a voltmeter, check the voltage across terminals TL1 and TL4 when the "TEA/OFF/COFFEE" switch is in the "TEA" position. Connect the brewer to the power source and press the START switch. The indication must be 120 volts ac for two wire 120 volt models and three wire 120/208 volt models.

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

If voltage is not present as described, disconnect the brewer from the power source and replace the timer.

Removal and Replacement:

1.Remove the two #8-32 screws securing circuit board to the mounting bracket.

2.Remove circuit board and spacers (as required).

3.Remove all wires from the timer.

4.Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 13 when reconnecting the wires.

5.Install new circuit board with spacers (as required) to the component mounting bracket.

6.Adjust the timer as described below.

Timer Setting:

NOTE: Prior to setting or modifying volumes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place. NOTE: All volume settings must be done with the sprayhead installed.

Page 21

10510

071000

 

 

SERVICE (cont.)

DIGITAL BREW TIMER (ICED TEA - Late

Models)(cont.)

1. Modifying brew volumes. To modify a brew volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board.

To increase a brew volume, place the TEA/OFF/ COFFEE switch in the “TEA” position, press and hold the START switch until three clicks are heard. Release the switch and press it again one or more times. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory.) Each time the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order to verify that the desired volume has been achieved.

To decrease a brew volume, place the TEA/OFF/

TL1 - WHI/VIO to Iced Tea Solenoid and

WHI/VIO to TEA/OFF/COFEE Switch

TL2 - WHI to Power Cord (120V Models) or

WHI to Terminal Block (120/208V Models)

TL3 - ORN to START Switch

TL4 - WHI/BLU to Iced Tea Solenoid P2037

TL5 - YEL to START Switch

FIG. 13 DIGITAL TIMER WIRING

Page 22

SERVICE (cont.)

8. Disconnect the brewer from the power source.

CONTROL THERMOSTAT

P2198.50

FIG. 14 CONTROL THERMOSTAT

Location:

The control thermostat is located inside hood on the right side to the left of the iced tea brew timer.

Test Procedures:

1.Disconnect the brewer from the power source.

2.With a voltmeter, check the voltage across the blue wire on the control thermostat and the white wire on the tank heater for 120 volt two wire models or red wire on the tank heater for 120/208 volt three wire models. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and 208 volts ac for three wire 120/208 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 the Wiring Diagrams and check the brewer wiring harness.

4.Locate the black wire on the control thermostat.

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

6.With a voltmeter, check the voltage across the black wire of the control thermostat and the white wire on the tank heater for 120 volt two wire models or red wire on the tank heater for 120/208 volt three wire models when the control thermostat is turned fully clockwise. Connect the brewer to the power source. The indication must be 120 volts ac for two wire 120 volt models and 208 volts ac for three wire 120/208 volt models.

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 both wires from the control thermostat terminals.

2.Remove the thermostat capillary bulb by firmly pulling up on the capillary tube at the tank lid. This will disengage the grommet from the tank lid.

3.Remove the #8-32 screw holding the control thermostat to its bracket.

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 a vertical position.

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

7.Fasten the new control thermostat to its bracket.

8.Refer to Fig. 15 when reconnecting the wires.

9.Adjust the control thermostat as required.

I

FF

H

UNNB

O

 

BLK to Tank Heater or

Thermal Fuse on Models

W/Faucet

BLU to Limit Thermostat

P1390

FIG. 15 CONTROL THERMOSTAT TERMINALS

Page 23

10510

081599

 

 

SERVICE (cont.)

5.

Check the solenoid valve for coil action. Connect

DILUTION SOLENOID VALVE

 

the brewer to the power source, place the TEA/

 

OFF/COFFEE switch in the “TEA” position and mo-

 

 

 

 

 

 

mentarily place the START switch in the lower po-

 

 

 

sition and release. Listen carefully in the vicinity

 

 

 

of the solenoid valve for a “clicking” sound as the

 

 

 

coil magnet attracts.

 

 

6.

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 block-

 

 

age in the water line before or after 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.

 

P2198.50

Removal and Replacement:

 

FIG. 16 DILUTION SOLENOID VALVE

1.

Remove all wires from the solenoid valves.

 

2.

Turn off the water supply to the brewer.

 

 

Location:

3.

Disconnect the water lines to and from the sole-

 

Viewing the brewer from the rear the dilution so-

 

noid valves.

lenoid is mounted on the right side of the solenoid

4.

Remove the two #8-32 keps nuts holding the

mounting bracket which is secured to the trunk base.

5.

mounting bracket to the trunk base.

 

 

Lift out the bracket.

Test Procedure:

6.

Remove the two #10-32 slotted-head screws hold-

1. Disconnect the brewer from the power source.

 

ing the solenoid valve to the mounting bracket.

2.

With a voltmeter, check the voltage across the

7.

Securely install the new solenoid valve to the

 

white/blue and white/violet wires on the dilution

 

mounting bracket.

 

solenoid terminals when the TEA/OFF/COFFEE

8.

Attach the mounting bracket to the trunk base.

 

switch is in the “TEA” position and the START

9.

Securely fasten the water lines to and from the

 

switch is momentarily placed in the lower posi-

 

solenoid valves.

 

tion. Connect the brewer to the power source.

10.

Refer to Fig. 17 when reconnecting the wires.

 

The indication must be 120 volts ac for two wire

 

 

 

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

 

 

 

els.

 

 

3. Disconnect the brewer from the power supply.

 

 

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

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

4. Remove both wires from the coil and check for continuity across the coil terminals.

If continuity is present as described, reconnect the

 

 

white/blue and white/violet wires and proceed to #5.

 

 

If continuity is not present as described, replace the

 

P1364

solenoid valve.

 

FIG.17 SOLENOID VALVE TERMINALS

 

 

 

Page 24

 

 

SERVICE (cont.)

LIMIT THERMOSTAT

P2198.50

FIG. 18 LIMIT THERMOSTAT

Location:

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

Test Procedure:

1.Disconnect the brewer from the power source and remove the black wire from the limit thermostat.

2.With a voltmeter, check the voltage across the black wire removed from the limit thermostat and the white or red wire on the tank heater terminal. Connect the brewer to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models.

b)208 volts ac for three wire 120/208 volt models.

3.Disconnect the brewer from the power source.

If voltage is present as described, reconnect the black wire and proceed to #4.

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

4. Remove the blue wire from the limit thermostat.

5.With a voltmeter, check the voltage across the exposed terminal of the limit thermostat and the white wire from the power cord or the red wire from the terminal block. Connect the brewer to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models.

b)208 volts ac for three wire 120/208 volt models.

6.Disconnect the brewer from the power source.

If voltage is present as described, reconnect the blue wire to the limit thermostat. The limit thermostat is operating properly.

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

Removal and Replacement

1.Remove both wires from the limit thermostat terminals.

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

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

4.Refer to Fig. 19 when reconnecting the wires.

BLU to Control

Thermostat

BLK to Power Cord or Terminal Block

FIG. 19 LIMIT THERMOSTAT TERMINALS P1800

Page 25

10510

081599

 

 

SERVICE (cont.)

TEA/OFF/COFFEE SWITCH

P1959.60

FIG. 20 TEA/OFF/COFFEE SWITCH

Location:

The TEA/OFF/COFFEE switch is located in the front of the hood, above and to the left of the brew funnel.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Remove the black, white/violet and white/red wires from the switch terminals.

3.With a voltmeter, check the voltage across the black wire removed from the TEA/OFF/COFFEE switch and the white wire remaining on the switch terminal.

4.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 volt models,

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 the wiring harness.

6.Check for continuity across the center and left terminals of the top row when switch is in the "TEA" position and the center and right terminals of the top row when the switch is in the "COFFEE” position.

If continuity is present as described, replace the wires, the switch is operating properly.

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

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 the switch captive in the hood.

4.Refer to FIG. 21 when reconnecting the wires.

BLK to Limit Thermostat

WHI/VIO to Tea

Brew Timer TL1 WHI/RED to Coffee Brew Timer TL1

WHI to Tea Brew

Timer TL2

P1367

FIG.21 TEA/OFF/COFFEE SWITCH TERMINALS

Page 26

10510

081599

 

 

SERVICE (cont.)

START SWITCH

FIG. 22 START SWITCH

P1959.60

 

Location:

The start switch is located in the front of the hood, above and to the right of the brew funnel.

Test Procedure:

1.Disconnect the brewer from the power source.

2.Remove the wires from all four terminals.

3.Check for continuity across the two terminals on the right side of 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, proceed to #4. If continuity is not present as described, replace the switch.

4.Check for continuity across the two terminals on the left side of 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 wires, the switch is operating properly.

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

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 the switch captive in the hood.

4.Refer to Fig. 23 when reconnecting the wires.

WHI/ORN to

ORN to Iced Tea

Coffee Brew

Brew Timer TL3

Timer TL3

 

WHI/YEL to

YEL to Iced

Coffee Brew

Tea Brew

Timer TL5

Timer TL5

P1368

FIG. 23 START SWITCH TERMINALS

Page 27

10510

081599

 

 

 

R

 

1.

 

2.

 

3

 

4

 

5.

 

6.

 

7

 

8.

 

9.

 

0

e

2

 

14

 

1

 

10510

Location:T

 

©utR9Bu1dj

02utqNC1.E

Removal and Replacement:

1. Disconnect the thermal fuse from the right tank heater terminal and the black lead from the control thermostat.

2. Remove thermal fuse and discard.

3. Connect new thermal fuse to the right tank heater terminal and the black lead from the control thermostat

4. Refer to Fig. 27 when reconnecting wires.HUYY

P2198.50

Location:

The thermal fuse is located inside the hood connected to the right tank heater terminal.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the thermal fuse from the right tank heater terminal and the black lead from the control thermostat.

3.With an ohmmeter, check for continuity across the thermal fuse terminals.

If continuity is present as described, the thermal fuse is operating properly.

If continuity is not present as described, replace the thermal fuse.

Page 29

FIG. 26 TH

HUYYOLL;;'FIG. O27 THERMAL FUSE THERMINALSP1393BLK Lead fromControl ThermostatThermal Fuse

SERVICE (cont.)

 

HALF BATCH SWITCH (Optional)

 

 

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 the switch captive in the hood.

 

4. Refer to FIG. 29 when reconnecting the wires.

 

GRY to Iced Tea

 

Brew Timer

 

PNK to Iced Tea

 

Brew Timer

 

P1038

P1959.60

FIG.29 HALF BATCH SWITCH TERMINALS

 

FIG. 28 HALF BATCH SWITCH

 

Location:

 

The HALF BATCH switch is located in the front of

 

the hood, above and to the far left of the brew funnel.

 

Test Procedure:

1.Disconnect the brewer from the power source.

2.With an ohmmeter, check for continuity between the two terminals of the switch.

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

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

Page 30

10510

081599

 

 

Page 31

READY INDICATOR

BLU

BLK

10502.0003A 9/00 ©2000 BUNN-O-MATIC CORPORATION

 

Page 32

10510

112000