Bunn SRU, Srua User Manual

SRU

SRUA

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.

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10067 100908

INTRODUCTION

WARNING

Very Hot Water Use With Care!

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

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.

SLOWLY

WARNING

REMOVE FUNNEL

WARNING

HOT

LIQUID

CAUTION

SURFACES

HOT

ATTENTION: TURN OFF WHEN UNATTENDED

This brewer will brew a three gallon batch of coffee into the reservoir, which has its own dispensing faucet. The brewer also has a hot water faucet 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.

#00656.0000

#00831.0000

#00878.0000

#12593.0000

#12555.0000

Page 3

#37881.0000

#03408.0000

#03409.0000

#29299.0000

10067 011608

ELECTRICAL REQUIREMENTS

GREEN GREEN

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

L2 RED

WHITE

NEUTRAL

L1 BLACK

120V A.C.

P1841

208 OR 240V A.C.

SRU Model requires 3-wire,

grounded service rated 120/208 or 120/240 volts ac, 30 amp, single phase, 60 Hz. Proceed as follows:

BLACK

RED

230V A.C.

P1842

SRUA-CE Models require 2wire, grounded service rated 230 volts ac, 30 amp, single phase, 60 Hz. Proceed as follows:

BLACK

RED

208 OR 240V A.C.

P1842

SRUA Models require 2-wire, grounded service rated 208 or 240 volts ac, 30 amp, single phase, 60 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 can damage the equipment and injure the installer. The chassis must be properly grounded. Do not assume a plumbing line will provide an adequate ground.

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 side panel from the hood and rotate the control thermostat knob fully clockwise to the "OFF" position. Keep this knob in the "OFF" position until performing the "Initial Setup" Replace the side panel.

4. Remove the lower front panel and connect the proper electrical service to the terminal block.

5. Connect the brewer to the power source and verify the voltage at the terminal block before proceeding. Replace the lower front panel.

6. Disconnect the brewer from the power source. If plumbing has been hooked up, the brewer is ready for the

Initial Setup.

NOTE: Schematic wiring diagrams are included in this manual.

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 specied 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.

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10067 102808

PLUMBING REQUIREMENTS

These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi (138 and 621 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 (621 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. BunnO-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.

Plumbing Hook-up

1. Make certain the 3/8" female ﬂare ﬁtting on the short tube from the outlet of strainer (supplied) is securely

attached to the male ﬁtting at the bottom rear of the brewer.

2. Flush the water line and securely attach it to the 3/8" male ﬂare ﬁtting on the inlet of the strainer.

3. Turn on the water supply.

4. Inspect the connection for leaks.

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.

Page 5

10067 011608

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. Disconnect the brewer from the power source.

2. Remove the left side panel from the hood and rotate the control thermostat knob fully counterclockwise to the "OFF" position. Replace the side panel.

3. Connect the brewer to the power source and place the lighted ON/OFF switch in the "ON" position. Water will ﬂow into the tank and should automatically stop after approximately 15 minutes.

NOTE - The lighted ON/OFF switch must be in the "ON" position to automatically reﬁll the tank. The switch should be in the "OFF" position whenever the brewer is left unattended.

4. Disconnect the brewer from the power source.

5. Remove the left side panel from the hood and rotate the control thermostat knob clockwise to the 5 o'clock position. Replace the side panel.

6. Connect the brewer to the power source and wait for the water in the tank to heat to the proper temperature. This will take approximately 1-2 hours, depending on the incoming water temperature. Some water will ﬂow from the overﬂow tube during this time due to expansion. Draw off a 1/2 gallon of water every 15 minutes during the initial heat-up to lessen the chance of hot water ﬂow from this expansion.

7. Determine the water temperature by checking the water with a thermometer at the hot water faucet (red handle). The best brewing temperature is between 195˚ (91˚C) and 200˚F (93˚C). The temperature may be increased by turning the thermostat knob clockwise and decreased by turning the knob counterclockwise.

8. When the desired temperature is attained, place the funnel support, funnel, and funnel cover on top of the coffee reservoir. Center the discharge of the water swing spout over the opening in the top of the funnel cover.

9. Place the lighted ON/OFF switch in the "ON" position and momentarily press and release the start switch. Water should ﬂow from the swing spout into the funnel assembly.

10. Drain and measure the water from the reservoir when the ﬂow of water from this initial cycle stops. If it is three gallons, proceed to step 12. If it is more or less than three gallons, proceed to step 11.

11. Adjust the brew timer as required. See Adjusting Brew Volumes. Repeat steps 9 & 10.

12. The brewer is now properly adjusted to brew coffee.

Bunn-O-Matic recommends a bead of silicon sealant be placed around the base on the countertop

after the initial operation instructions are completed. B.O.M. #M2509.1001 sealant is available.

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10067 011608

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” posi-

tion 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 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 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 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 until switch is once again placed in the “SET” position.

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.(This switch must be in the "ON" position to start and complete a

brewing cycle.)

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 urn 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.

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10067 080200

CLEANING

NOTE: Tank 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 funnel, funnel lid and support. Under hot water, rinse away all coffee oils. Wipe with a clean damp cloth.

2. Drain coffee reservoir by opening coffee faucet. When empty, close faucet.

3. Cycle two or three inches of water into the coffee reservoir and scrub entire reservoir area. (Pour a bucket of cracked ice in coffee reservoir to obtain a more desirable cleaning water temperature.)

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

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

5. Install coffee funnel support, funnel and funnel lid.

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

7. To clean coffee faucet, 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 cup periodically if badly stained or to stop faucet dripping. DO NOT CLEAN THE HOT WATER FAUCET.

8 Reassemble the coffee faucet.

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

CAUTION - CLEANING SURFACES ARE HOT!!

FILTER HOLDER

1. A ﬁlter holder is supplied with each SRU 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.

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10067 081506

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 qualied service person-

nel.

• 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 ttings 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 specied.

• Follow recommended service procedures

• Replace all protective shields or safety notices

PROBLEM

Brew cycle will not start

PROBABLE CAUSE

1. No water

2. No power or incorrect voltage to the brewer

REMEDY

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 and 240 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 and 240 volt models.

Page 9

(B) Check circuit breakers or fuses.

10067 040100

TROUBLESHOOTING (cont.)

PROBLEM

Brew cycle will not start (cont)

PROBABLE CAUSE

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

4. ON/OFF Switch

5. Start Switch

6. Timer

7. Pump

8. Solenoid Valve

REMEDY

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).

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

Refer to Service - Start Switches for testing procedures. See page 28

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

Refer to Service - Pump for testing procedures. See page 24

Refer to Service - Solenoid Valve for testing procedures. See page 26

Tank not ﬁlling

9. Strainer

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

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

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

Refer to Service - ON/OFF Switch for testing procedures. See page 23

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 26

Refer to Service - Probe for testing procedures. See page 21

5. Liquid Level Board

Page 10

Refer to Service - Liquid Level Board for testing procedures. See page 21

10067 080200

TROUBLESHOOTING (cont.)

PROBLEM

Water running out of the overﬂow

Water is not hot

PROBABLE CAUSE

1. Brewer not level

2. Solenoid Valve

3. Liquid Level Board

4. Probe

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

2. Control Thermostat

REMEDY

Brewer must be level and installed on a sturdy structure.

Refer to Service - Solenoid Valve for testing procedures. See page 26

Refer to Service -Liquid Level Board for testing procedures. See page 21

Refer to Service - Probe for testing procedures. See page 21

Refer to Service - Limit Thermostat for testing procedures. See page 20

Refer to Service - Control Thermostat for testing procedures. See page 18

3. Tank Heater(s)

4. Contactor

Refer to Service - Tank Heater for testing procedures. See page 29

Refer to Service - Contactor for testing procedures. See page 16

Page 11

10067 080200

TROUBLESHOOTING (cont.)

PROBLEM

Circuit breaker keeps tripping

Water keeps running from swing spout

Inconsistent coffee yield

PROBABLE CAUSE

1. Circuit Breaker

2. ON/OFF Switch

3. Brew Circuit

4. Reﬁll Circuit

1. Timer

2. Start Switch

1. Timer

REMEDY

Refer to Service - Circuit Breaker for testing procedures. See page 15

Refer to Service - ON/OFF Switch for testing procedures. See page 23

Refer to Service - Pump Assembly for testing procedures. See page 24

Refer to Service - Liquid Level Board for testing procedures. See page 21

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

Funnel overﬂows

2. Solenoid Valve

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

1. Filters

2. Hole in bottom of funnel obstructed.

3. Pump - Flow Rate

Refer to Service - Solenoid Valve for testing procedures. See page 26

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

Use Bunn® ﬁlters made for the SRU brewer.

Remove obstruction.

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.

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10067 080200

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