Bunn U3, U3A User Manual

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U3A

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

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

To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and

manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

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

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

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

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

4)Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years or 30,000 pounds of coffee, whichever comes first.

These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or casualty. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under warranty.

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

If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for the equipment.

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

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

BrewWISE, BrewLOGIC, BrewWIZARD, BUNN Gourmet Ice, BUNN Pour-O-Matic, BUNN, Bunn-OMatic, Bunn-O-Matic, BUNNlink, BUNNserve, BUNN Espress, DBC, Dr. Brew, Dual, EasyClear, EasyGard, Easy Pour, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, IMIX, Infusion Series, Quality Beverage Equipment Worldwide, The Mark of Quality in Beverage Equipment Worldwide, My Café, PowerLogic, Safety-Fresh, Scale-Pro, Single, Smart Funnel, Smart Hopper, SmartWAVE, Soft Heat, SplashGard, System III, ThermoFresh, 392, AutoPOD, AXIOM, Beverage Profit Calculator, Beverage Bar Creator, BrewMETER, BUNNSERVE, BUNNsource, Coffee At Its Best, Cool Froth, Digital Brewer Control, Intellisteam, Nothing Brews Like a BUNN, Pouring Profits, Pulse Wave, Signature Series, Silver Series, Smart Heat, Tea At Its Best, The Horizontal Red Line, Titan, Ultra, are either trademarks or registered trademarks of Bunn-O-Matic Corporation.

Page 2	10060	100908

INTRODUCTION

This brewer will brew a three gallon batch of coffee into each reservoir (one at a time). Each reservoir has its own dispensing faucet(s).The brewer also has a hot water faucet(s) for allied beverage use. It is only for indoor use on a sturdy counter where ambient temperature is in the range of 10-30°C (50-85°F). Brewer to be installed at a location where it can be overseen by trained personnel.

USER NOTICES

Carefully read and follow all notices on the brewer and in this manual. They were written for your protection. All notices on the brewer are to 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.

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

#00831.0000

WARNING

Very Hot Water

Use With Care!

#12593.0000

CAUTION

HOT

SURFACES

#12555.0000

This equipment must be installed to comply with the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A., comply with the applicable Plumbing /Sanitation Code.

#00656.0000

#37881.0000

WARNING

REMOVE FUNNEL

SLOWLY

#03408.0000

WARNING

LHI QOU ITD

#03409.0000

ATTENTION: TURN OFF WHEN UNATTENDED

#00878.0000

#00824.0001

Page 3	10060	011708

ELECTRICAL REQUIREMENTS

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

	L2 RED
	WHITE	120V A.C.
	WHITE	208 OR
		208 OR
	NEUTRAL	240V A.C.
	NEUTRAL	120V A.C.
	L1 BLACK	120V A.C.
	L1 BLACK

P1841

U3 & U38 requires 3-wire, grounded service rated 120/208 or 120/240 volts ac, U3-30 amp,U38-40 amp, single phase, 60 Hz. Proceed as follows:

RED

BLUE	208V OR 240V
BLUE	380V OR 440V
L3	208V OR 240V
L3	380V OR 440V
BLACK	208V OR 240V
BLACK	380V OR 440V
L1

GREEN GREEN

P1843

U333 & U3833 requires 3-wire, grounded service rated 240 volt ac, 35 amp or 440 volts ac, 30 amp for U333,three phase, 60 Hz or 380 volts ac, 30 amp for U3833, three phase, 50 Hz. Proceed as follows:

BLACK L1
RED	230V A.C.
RED
L2

GREEN GREEN

P1842

U3A models require 2-wire, grounded service rated 230 volts ac, 30 amp, single phase, 50 Hz. Proceed as follows:

WHITE

(NEUTRAL) N

RED L2

BLUE L3

BLACK L1

GREEN

P1844

L1, L2, L3, are the 3 phases

V1 = Phase to phase voltage, between any 2 phases.

V2 = Phase to neutral voltage, any phase to neutral.

SYSTEM
VOLTAGE	V1	V2
208	208	120
240	240	139
380	380	220
440	440	254

U3833 requires 4-wire, grounded service rated 380 volts ac or 440 volts ac, 30 amp, three phase, 50 Hz. Proceed as follows:

ELECTRICAL INSTALLATION INSTRUCTIONS

NOTE: Electrical source should have a circuit breaker between the brewer and the main supply which breaks all poles with a contact separation of at least 3 mm.

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.Before electrically connecting the brewer, remove the front cupola cover (some models have the thermostat knob on the outside of the cover) and rotate the thermostat knob fully counterclockwise to the "OFF" position. Keep this knob in the "OFF" position until performing the Initial Setup.

4.Electrical service is connected at the upper rear of the single service and scrambler brewers using a junction box. On double service brewers the rear decorative channel must be removed for access to the terminal block.

5.Connect the brewer to the power source and verify the voltage at the terminal block before proceeding. Replace all panels.

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 Setup.

NOTE: Schematic wiring diagrams are included in this manual.

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CE REQUIREMENTS

•This appliance must be installed in locations where it can be overseen by trained personnel.

•For proper operation, this appliance must be installed where the temperature is between 5°C to 35°C.

•Appliance shall not be tilted more than 10° for safe operation.

•An electrician must provide electrical service as specified in conformance with all local and national codes.

•This appliance must not be cleaned by water jet.

•This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given instructions concerning use of this appliance by a person responsible for its safety.

•Children should be supervised to ensure they do not play with the appliance.

• If the power cord is ever damaged, it must be replaced by the manufacturer or authorized service personnel with a special cord available from the manufacturer or its authorized service personnel in order to avoid a hazard.

PLUMBING REQUIREMENTS

These brewers must be connected to a cold water system with operating pressure between 20 (138) and 90 psi (620 kPa) 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 (620 kPa) to reduce it to 50 psi (345 kPa). The water inlet fitting is 3/8" flare.

NOTE - Bunn-O-Matic recommends 3/8" copper tubing for installations 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 International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A., you must comply with the applicable Plumbing/Sanitation Code for your area.

INITIAL SETUP

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

IMPORTANT: Brewer must be level and installed on a sturdy structure.

Electrician's and Plumber's Instructions are provided. These instructions should be carefully followed before proceeding with initial setup.

Be sure all electrical and plumbing connections are tight.

1.Open manual fill valve located on the bottom of the brewer. Water should start filling the tank. When water is visible in the hot water gauge glass (center spigot), close valve. Approximate time for filling manually is 3 minutes.

CAUTION: Never leave brewer unattended while manually filling tank.

2. Connect the brewer to the power source. Turn "ON/OFF" switch to the "ON" position. Water should finish filling tank automatically.

NOTE: It is recommended that the "ON/OFF" switch be left in the "OFF" position at the end of the operating day or when unattended for a long period of time.

3.Disconnect the brewer from the power source. Remove front cupola cover for access to thermostat knob and timer. On some brewers the thermostat knob is located on the front of the cupola cover.

4.Turn the thermostat knob clockwise to an approximate 5 o'clock position. Allow 1-1/2 hours for water to heat. Time will vary with incoming water temperature.

5.On initial warm-up, some water may flow thru the overflow spigot due to expansion of the cold water in the tank. This will not recur during the use of the brewer and may be avoided on the initial warm-up by drawing off 1/2 gallon decanters of water each 15 minutes till brewing temperature is reached.

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INITIAL SETUP (cont.)

6.Brewing cycles may be started whenever water temperature is correct. This condition is indicated by the dial thermometer on front of the brewer. Whenever the pointer is in the green, brewer is ready for brewing. The recommended brewing temperature is approximately 200° F (93°C). Water temperature may be increased by turning thermostat knob clockwise, decreased by turning knob counterclockwise.

7.When desired temperature is reached, insert funnel support, funnel and funnel cover in position. Be sure the water swing spout is over the center of the funnel cover, turn "ON/OFF" switch to the "ON" position, push and release "START" and run a brew cycle of hot water only. At the end of this cycle, brewer will be ready for checking timer adjustment.

8.The timer has been preset for a 4 minute cycle. This setting will deliver approximately 3 gallons of water per brewing cycle. To increase or decrease amount of water, adjust the timer as required. See Adjusting Brew

Volumes.

9.Having determined final settings of the thermostat and the timer, replace front cupola cover. Brewer is now ready for brewing coffee.

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 support, funnel and funnel cover 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 you see three breaks in the water stream from the swing arm. Release the switch (Failure to release the switch within two seconds after the third break in the water stream 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 you see three breaks in the water stream from the swing arm. Release the switch. (Failure to release the switch within two seconds after the third break in the water stream 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 you see three breaks in the water stream from the swing arm, and then release the switch. (Failure to release the switch within two seconds after the third break in the water stream 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. NOTE: HALF-BATCH AND FULL BATCH SETTINGS MUST EACH BE SET SEPARATELY.

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.

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COFFEE BREWING

1.Brewing cycles may be started whenever water temperature is correct. This condition is indicated by the dial thermometer on front of the brewer. Whenever the pointer is in the green, brewer is ready for brewing.

2.Insert Bunn® filter in funnel and add desired amount of coffee.

3.Level the bed of coffee and place funnel into the funnel support. Place funnel cover over the funnel and be sure the water swing spout is over the center of the funnel cover.

4.Turn "ON/OFF" switch to the "ON" position.

5.Push and release "START" switch to start the brew cycle.

6.Water swing spout should not be moved as long as water is flowing into the funnel cover. When water stops flowing, it may then be moved for access to brewing funnel.

7.Remove funnel cover. Funnel should not be removed from brewer until drip out of coffee has been completed.

8.To empty funnel, invert it over a waste container to dispose of filter and grounds. An additional flange is provided on the funnel to help make this step easier.

NOTE: Hot water may be drawn from the hot water faucet during a brew cycle. However, if a large amount of hot water is drawn off (over 1 gallon) operator should wait to do so between brewing cycles.

CLEANING

NOTE: Tanks and tank components should be delimed regularly based on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosion reactions resulting in serious leaks.

1.Remove both funnels, funnel lids and supports, under hot water, rinse away all coffee oils. Wipe with a clean damp cloth.

2.Drain both coffee reservoirs by opening coffee faucets. When empty, close faucets.

3.Cycle two or three inches of water into each coffee reservoir and scrub entire reservoir area.

NOTE: The brewer must NOT be rinsed or cleaned by a water jet device.

4.Drain both coffee reservoirs and rinse. Use clean damp cloth to wipe both reservoirs.

5.Install both coffee funnel supports, funnels and funnel lids.

6.Remove the sight gauge cap, insert sight gauge cleaning brush into the sight gauge glass tube and clean.

7.To clean coffee faucets, remove the faucet handle from the faucet and faucet clean out cap. Clean faucet with a faucet cleaning brush and wipe all parts with a damp cloth. Replace faucet seat cups periodically if badly stained or to stop faucet dripping. DO NOT CLEAN THE HOT WATER FAUCET.

8 Reassemble the coffee faucets.

9.Wipe the entire outside surface of the machine with a clean damp cloth. Wipe dry.

FILTER HOLDER

1.A filter holder is supplied with each U3 coffee brewer. Its purpose is to keep the filters in their originally formed shape to properly fit the brewer funnel.

2.It is suggested that only one cluster of filters be placed in the holder at one time for best results.

3.Not using the filter holder may permit the filters to gradually widen out towards a flat shape, especially so if humidity is present. Once a filter has lost its upright side walls, it may tend to collapse inward when placed in the brewing funnel. If this happens the hot water spray may cause one side to fall inwards, letting coffee grounds flow over the edge of filter and into the brewed coffee. Proper use of the holder should prevent this problem.

Page 7	10060	081106

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	1.	No water
	2.	No power or incorrect voltage to
	the brewer

Water lines and valves to the brewer must be open.

(A1) Check the terminal block for

120 volts ac across the red and white terminals and the black and white terminal on three wire 102/208 volt or 120/240 volt models.

(A2) Check the terminal block for 208 volts ac, 230 volts ac or 240 volts ac on "A Series" brewers across the red and black terminals on two wire single phase 208 volt, 230 volt and 240 volt models.

(A3) Check the terminal block for 208 volts ac, 240 volts ac, 380 volts ac across the black and blue terminals, the blue and red and the black and red terminals on three wire three phase 208 volt, 240 volt and 380 volt models.

Page 8	10060	031500

TROUBLESHOOTING (cont.)

PROBLEM

Brew cycle will not start (cont)

PROBABLE CAUSE

REMEDY

2. No power or incorrect voltage to the brewer (cont)

(A4) Check the terminal block for

440 volts ac across the black and blue terminals, black and red terminals and the red and blue terminals on four wire three phase 440 volt models.

(B) Check circuit breakers or fuses.

3. Water level below pump housing. (Water level in the hot water gauge glass should be approximately half full).

Be sure water shut-off valve is open and that the in-line filters or strainers are not blocking water flow. (Do not confuse water shut-off valve with the manual fill and drain valve underneath the brewer).

4.	ON/OFF Switch	Refer to Service - ON/OFF Switch for
		testing. See page 22
5.	Start Switch	Refer to Service - Start Switches for
		testing procedures. See page 29
6.	Relay	Refer to Service - Relay for testing
		procedures. See page 24
7.	Timer	Refer to Service - Timer for testing
		procedures. See page 31 or 33
8.	Pump	Refer to Service - Pump for testing
		procedures. See page 23
9.	Solenoid Valve	Refer to Service - Solenoid Valve for
		testing procedures. See page 27
10. Strainer		(A) Direction of flow arrow must be
		pointing towards brewer.
		(B) Remove the strainer and check
		for obstructions. Clear or replace.
Brew cycle starts with brew lockout 1. Relay		Refer to Service - Relay for testing
relay engaged.		procedures. See page 24

Page 9	10060	080900

TROUBLESHOOTING (cont.)

PROBLEM

Tank not filling

Water running out of the overflow

PROBABLE CAUSE

1.ON/OFF Switch (This switch must be in the "ON" position for the refill circuit to operate.

2.No water

3.Solenoid Valve

4.Probe

5.Liquid Level Board

1.Brewer not level

2.Solenoid Valve

3.Liquid Level Board

4.Probe

5.Manual fill and drain valve underneath brewer open.

REMEDY

Refer to Service - ON/OFF Switch for testing procedures. See page 22

Be sure water shut-off is open and that in-line filters or strainers are not blocking water flow. (Do not confuse water shut-off valve with the manual fill and drain valve underneath brewer).

Refer to Service - Solenoid Valve for testing procedures. See page 27

Refer to Service - Probe for testing procedures. See page 20

Refer to Service - Liquid Level Board for testing procedures. See page 20

Brewer must be level and installed on a sturdy structure.

Refer to Service - Solenoid Valve for testing procedures. See page 27

Refer to Service -Liquid Level Board for testing procedures. See page 20

Refer to Service - Probe for testing procedures. See page 20

Be sure valve is closed.

Page 10	10060	080900

TROUBLESHOOTING (cont.)

PROBLEM

Water not hot

Circuit breaker keeps tripping

Water keeps running from swing spout

Inconsistent coffee yield

Funnels overflow

PROBABLE CAUSE

1. Limit Thermostat

CAUTION - Do not eliminate or bypass limit thermostat. Use only Bunn-O-Matic replacement part #29329.1000

2.Control Thermostat

3.Tank Heater(s)

4.Contactor

1.Circuit Breaker

2.Tank Heater(s)

1.Timer

2.Start Switch

1.Timer

2.Solenoid Valve

3.Lime build-up in swing spout and pump tubing.

1.Filters

2.Hole in bottom of funnel obstructed.

REMEDY

Refer to Service - Limit Thermostat for testing procedures. See page19

Refer to Service - Control Thermostat for testing procedures. See page 17

Refer to Service - Tank Heater for testing procedures. See page 30

Refer to Service - Contactor for testing procedures. See page 15

Refer to Service - Circuit Breaker for testing procedures. See page 14

Refer to Service - Tank Heater for testing procedures. See page 30

Refer to Service - Timer for testing procedures. See page 31 or 33

Refer to Service - Start Switch for testing procedures. See page 29

Refer to Service - Timer for testing procedures. See page 31 or 33

Refer to Service - Solenoid Valve for testing procedures. See page 27

Remove swing spout and insert deliming rod down into pump tubing as far as possible.

Use Bunn® filters made for the U3 brewer.

Remove obstruction.

Page 11	10060	080900

TROUBLESHOOTING (cont.)
PROBLEM	PROBABLE CAUSE
Funnels overflow (cont.)	3. Pump - Flow Rate

4. Soft Water

Coffee reservoir overflows

1. Coffee reservoir not completely empty befor a brew cycle was started.

2. Timer

3. Pump - Flow Rate

Brewer is making unusal noises

1. Solenoid Valve

2. Plumbing lines

3. Water supply

4. Tank Heater(s)

REMEDY

Check pump flow rate with a watch. Pump flow rate should be approximately 24 ounces in 15 seconds. Be sure pump assembly is free of any obstructions.

When using a water softener, a coarse grind of coffee may be preferred. If required, a bypass system is available as an optional feature.

Be sure coffee reservoir is empty before brew cycle is started.

Refer to Service -Timer for testing procedures. See page 31 or 33

Check pump flow rate with a watch. Pump flow rate should be approximately 24 ounces in 15 seconds. Be sure pump assembly is free of any obstructions.

The nut on the solenoid must be tight or it will vibrate during operation.

Plumbing lines should not be resting on the counter top.

(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 pressure to approximately 50 psi (345 kPa).

Remove and clean lime off the tank heater. See page 30

Page 12	10060	080900

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 swing spout, front cupola cover, rear cupola cover and the cupola.

Disconnect the swing spout nut from the swing spout base fitting. Remove swing spout.

Remove the four #8-32 screws, two on the front and rear, securing front and rear cupola covers to the cupola.

Slip cupola off of the component bracket.

Contents
Circuit Breaker ......................................................	14
Contactor...............................................................	15
Control Thermostat................................................	17
Fuse and Fuse Holder ...........................................	18
Limit Thermostat...................................................	19
Liquid Level Board and Level Probe .....................	20
ON/OFF Switch......................................................	22
Pump.....................................................................	23
Relay ....................................................................	24
Selector Switch (Half Batch)..................................	26
Solenoid ...............................................................	27
Start Switch (Brew)...............................................	29
Tank Heater(s).......................................................	30
Thermal Cut-off ...................................................	31
Timer (Early Models).............................................	31
Digital Timer (Late Models)...................................	33
Transformer...........................................................	35
Master ON/OFF Switch (Late Models)....................	36
Wiring Diagrams.......................................	37 thru 42

FIG. 1 COMPONENT ACCESS	P1317.30

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