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SRUA
Installation Manual
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Bunn Coffee Maker SRUA Installation Manual

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BUNN
®
SRUA
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10067.0000F 8/00 ©1981 Bunn-O-Matic Corporation
INTRODUCTION
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.
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.
Page 2
10067 040100
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
#10044.0000
#03408.0000
#03409.0000
#12555.0000
Page 3
#29299.0000
10067 040100
ELECTRICAL REQUIREMENTS
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.
208 OR 240V A.C.
120V A.C.
P1841 P1842
SRU Model requires 3­wire, grounded service rated 120/208 or 120/240 volts ac, 30 amp, single phase, 60 Hz. Proceed as follows:
L2 RED
230V A.C.
L1 BLACK
P1842
SRUA-CE Models require 2­wire, grounded service rated 230 volts ac, 30 amp, single phase, 60 Hz. Proceed as follows:
L2 RED
208 OR 240V A.C.
L1 BLACK
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 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.
"
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.
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10067 040100
ELECTRICAL INSTALLATION INSTRUCTIONS (CONT.)
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).
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
12. The brewer is now properly adjusted to brew coffee.
Adjusting Brew Volumes.
Repeat steps 9 & 10.
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.
Page 5
10067 080200
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 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.)
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 080200
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
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 8
(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 27
Refer to
Service
- Timer for testing
procedures. See page 30 or 32
Refer to
Service
- Pump for testing
procedures. See page 23
Refer to
Service
- Solenoid Valve for
testing procedures. See page 25
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 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 25
Refer to
Service
- Probe for testing
procedures. See page 20
5. Liquid Level Board
Page 9
Refer to
Service
- Liquid Level Board
for testing procedures. See page 20
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.
REMEDY
Brewer must be level and installed on a sturdy structure.
Refer to
Service
- Solenoid Valve for testing procedures. See page 25
Refer to
Service
-Liquid Level Board for testing procedures. See page 20
Refer to
Service
- Probe for test-
ing procedures. See page 20
Refer to
Service
- Limit Thermo­stat for testing procedures. See page 19
2. Control Thermostat
3. Tank Heater(s)
4. Contactor
Refer to
Service
- Control Ther­mostat for testing procedures. See page 17
Refer to
Service
- Tank Heater for
testing procedures. See page 28
Refer to
Service
- Contactor for
testing procedures. See page 15
Page 10
10067 080200
TROUBLESHOOTING (cont.)
PROBLEM
Circuit breaker keeps tripping
Water keeps running from swing spout
PROBABLE CAUSE
1. Circuit Breaker
2. ON/OFF Switch
3. Brew Circuit
4. Refill Circuit
1. Timer
2. Start Switch
REMEDY
Refer to
Service -
Circuit Breaker for testing procedures. See page 14
Refer to
Service
- ON/OFF Switch for testing procedures. See page 22
Refer to
Service -
Pump Assembly for testing procedures. See page 23
Refer to
Service -
Liquid Level Board for testing procedures. See page 20
Refer to
Service -
Timer for testing
procedures. See page 30 or 32
Refer to
Service -
Start Switch for
testing procedures. See page 28
Inconsistent coffee yield
Funnel overflows
1. Timer
2. Solenoid Valve
3. Lime build-up in swing spout and pump tubing.
1. Filters
2. Hole in bottom of funnel obstructed.
Refer to
Service -
Timer for testing
procedures. See page 30 or 32
Refer to
Service -
Solenoid Valve for testing procedures. See page 25
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.
Page 11
10067 080200
TROUBLESHOOTING (cont.)
PROBLEM
Funnel overflows (cont.)
Coffee reservoir overflows
PROBABLE CAUSE
3. Pump - Flow Rate
4. Soft Water
1. Coffee reservoir not completely empty before a brew cycle was started.
2. Timer
3. Pump - Flow Rate
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 test-
ing procedures. See page 30 or 32
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.
Brewer is making unusal noises
1. Solenoid Valve
2. Plumbing lines
3. Water supply
4. Tank Heater(s)
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 (621 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 28
Page 12
10067 080200
SERVICE
This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to
Troubleshooting
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.
The control thermostat, limit thermostat, pump, solenoid valve, liquid level probe and tank heater are accessible by removal of the swing spout, front cupola cover, rear cupola cover and the cupola.
for assistance in determining the
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
Selector Switch (Half Batch) ................................ 24
Solenoid .............................................................. 25
Start Switch (Brew) ............................................. 26
Tank Heater ......................................................... 28
Thermal Cut-off .................................................. 29
Timer (Early Models) ........................................... 30
Digital Brew Timer (Late Models) ........................ 32
Wiring Diagrams...................................... 34 thru 36
Disconnect the swing spout nut from the swing spout base fitting. Remove swing spout.
Remove the four #8-32 screws, two on each side, securing the side covers to the cupola.
Slip cupola off of the component bracket.
The on/off switch, selector switch, start switch, timer, contactor and liquid level control board are accessible by removal of the front lower panel.
Remove the four #8-32 screws securing the front access panel to the base.
The circuit breaker, fuse and fuse holder are acces­sible by removal of the rear utility cover.
Remove the six #8-32 screws securing the rear utility cover to the housing.
P2053.25
FIG. 1 COMPONENT ACCESS
Page 13
10067 080200
SERVICE (cont.)
CIRCUIT BREAKER (120/208V and 120/240V Three Wire Models)
P2115.30
FIG. 2 CIRCUIT BREAKER
If continuity is not present as described, press the reset button and repeat step 5, if continuity is not present as described, replace the circuit breaker.
Removal and Replacement:
1. Remove wires from the circuit breaker.
2. Remove the nut securing the circuit breaker to the component bracket.
3. Remove circuit breaker and discard.
4. Install new circuit breaker on component bracket and secure with nut.
5. Refer to Fig. 3 and reconnect the wires.
Location:
The circuit breaker is located on the rear of the urn,
behind the rear utility cover.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the black wire from the main harness from the circuit breaker and the white wire on the pump assembly. With a voltmeter, check the volt­age across the black wire and the white wire. Connect the brewer to the power source. The indication must be 120 volts for 120/208 and 120/ 240 volt, 3-wire with ground, single phase.
3. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the white wire to the pump assembly and proceed to #4. If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
BLK from Main Harness
BLK from ON/ OFF Switch
FIG. 3 CIRCUIT BREAKER TERMINALS
P1723
4. With the black wire removed, remove the other black wire from the circuit breaker.
5. Check for continuity across the terminals on the circuit breaker.
Page 14
10067 040100
SERVICE (cont.) CONTACTOR
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. Check for continuity between the black leads on the contactor coil or the left and right terminals on the contactor coil on 230 volt models.
If continuity is present as described, reconnect the wires and proceed to #7. If continuity is not present as described, replace the contactor.
P2208.40
FIG. 4 CONTACTOR
Location:
The contactor is located inside the front lower
access panel, left of center on the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source. 2A. 120/208V and 120/240V THREE WIRE MODELS
Disconnect the black wire from the contactor coil to the limit thermostat and black wire from the white wire on the main harness.
2B. 208V or 240V TWO WIRE MODELS, 208V and
240V THREE WIRE MODELS Disconnect the black wire from the contactor coil to the limit thermostat and black wire from the red wire on the main harness.
2C. 230V MODELS
Disconnect the red wire from contactor coil to the limit thermostat and the black wire from the main harness.
3. Connect the brewer to the power source.
4. Check the voltage across the limit wire and the wire from the the main harness.The indication must be: a) 120 volts for 120/208 and 120/240 volt, 3-wire with ground, single phase; b) 230 volts for 230 volt, 2-wire with ground, single phase; c) 208 volts for 208 volt, 2-wire with ground, single phase; d) 240 volts for 240 volt, 2-wire with ground, single phase.
7. On all brewers check the voltage across the upper left terminal and the upper right terminal on the contactor with a voltmeter. Connect the brewer to the power source. The indication must be: a) 120 volts for 120/208 and 120/240 volt, 3-wire with ground, single phase; b) 230 volts for 230 volt, 2-wire with ground, single phase; c) 208 volts for 208 volt, 2-wire with ground, single phase; d) 240 volts for 240 volt, 2-wire with ground, single phase.
8. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #9. If voltage is not present as described, refer to the
wiring diagrams and check the brewer wiring harness.
9. Check for continuity across the terminals on the left side of the contactor by manually closing the contacts. Continuity must not be present when the contact is released.
10. Check for continuity across the terminals on the right side of the contactor by manually closing the contacts. Continuity must not be present when the contact is released.
If continuity is present as described, the contactor is operating properly. If continuity is not present as described, replace the
contactor.
Page 15
10067 040100
SERVICE (cont.)
CONTACTOR (cont.)
Removal and Replacement:
1. Disconnect all the wires from the contactor.
2. Remove the two #8-32 screws securing the contactor to the contactor mounting bracket.
3. Install new contactor and secure with two #8-32 screws.
4. Refer to Fig. 5 and reconnect the wires.
BLK to Terminal Block (L1)
BLK to Tank Heater (L1)
RED to Tank Heater (L2)
BLK to Limit Thermostat
RED to Terminal Block(L2)
WHI from Main Harness (120/208V and 120/240V Three Wire Models) RED from Main Harness (208V, 240V Two Wire Models)
BLK to Terminal Block (L2)
BLK Thermal Fuse to Tank Heater
RED to Terminal Block (L2)
BLK to Terminal Block (L1)
RED Thermal Fuse to Tank Heater
RED to Limit Thermostat
230V - CE Models
120/208V, 120/240V, 208V,
240V MODELS
FIG.5 CONTACTOR TERMINALS
P1725.50
10067 040100
Page 16
SERVICE (cont.)
CONTROL THERMOSTAT
FIG. 6 CONTROL THERMOSTAT
P2113.40
Location:
The control thermostat is mounted on the left
front of the top component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Locate the thermostat and the voltage check points.
Model 120/208V & 120/240V - 3­wire w/ground single phase
230V - 2-wire w/ground single phase
Check Voltage Across Black wire on thermo­stat from main harness to white wire in terminal block.
Red wire on thermo­stat from main harness to black wire
Voltage 120V
230V
in terminal block.
208V or 240V ­2-wire w/ground single phase
Black wire on thermo­stat from main harness to red wire in
208V or 240V
the terminal block.
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the
wiring diagrams and check the brewer wiring harness.
If continuity is present as described, the control ther-
mostat is operating properly.
If continuity is not present as described, replace the
control thermostat.
Removal and Replacement:
1. Disconnect the wires from the control thermostat.
2. Remove the thermostat capillary bulb by firmly
pulling up on the capillary at the component bracket. This will disengage the grommet from the compo­nent bracket.
3. Remove the #8-32 screw securing the control
thermostat and mounting bracket to the compo­nent bracket. Remove control thermostat and bracket as an assembly.
4. Remove knob from control thermostat.
5. Remove the two #6-32 screws securing the con-
trol thermostat to the thermostat mounting bracket. Remove and discard thermostat.
6. Install new control thermostat on thermostat
mounting bracket and secure with two #6-32 screw.
7. Install knob on thermostat.
8. Install thermostat and mounting bracket on the
component bracket and secure with one #8-32 screw.
9. Carefully bend the capillary tube so that the tube
and bulb inside the brewer are in the vertical position. The tube should extend an additional
5.5", above the bulb into the brewer.
NOTE: The capillary tube must be clear of any electrical
termination and not kinked.
10. Refer to Fig. 7 and reconnect the wires.
11. Adjust the control thermostat as required.
BLK from Main Harness (All Models Except 230V CE Models RED from Main Harness (230V CE Models)
5. Disconnect the black or red wires from the control thermostat.
6. Check for continuity across the terminals on the control thermostat with the control thermostat in the "ON" position (fully clockwise), continuity must not be present when the thermostat is in the "OFF" position (fully counterclockwise).
Page 17
BLK to Limit Thermostat (All Models Except 230V CE Models RED to Limit Thermostat (230V CE Models)
P1730
FIG. 7 CONTROL THERMOSTAT TERMINALS
10067 040100
SERVICE (cont.) FUSE AND FUSE HOLDER (208V, 240V and 230V
Two Wire Models)
Fuse Holder:
1. Disconnect the wires from the rear of the fuse holder.
2. Remove the nut securing the fuse holder to the component bracket.
3. Push fuse holder through the hole in the compo­nent bracket.
4. Install new fuse holder and fuse through the hole in the component bracket and secure with nut.
5. Refer to Fig. 9 and reconnect the wires.
BLK from ON/OFF Switch (208V and 240V Two Wire Models)
RED from ON/OFF Switch (230V Two Wire Models)
P2122.30
FIG.8 FUSE AND FUSE HOLDER
Location:
The fuse and fuse holder are located on the rear of
the urn behind the rear utility cover.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Remove the cap and fuse from the fuse holder.
3. Remove fuse from the cap.
4. Check for continuity through the fuse.
If continuity is present as described, reinstall the fuse, the fuse is operating properly. If continuity is not present as described replace the fuse.
Removal and Replacement: Fuse:
1. Remove the cap from the fuse holder.
2. Remove fuse from the fuse holder, inspect, if blown discard.
3. Install new 5 amp fuse in the fuse holder.
4. Reinstall fuse holder cap.
BLK from Main Harness (208V and 240V Two Wire Models) RED from Main Harness (230V Two Wire Models)
FIG. 9 FUSE HOLDER TERMINALS
P2112
Page 18
10067 040100
SERVICE (cont.) LIMIT THERMOSTAT
FIG. 10 LIMIT THERMOSTAT
P1732
Location:
The limit thermostat is located on the center rear
of the component bracket behind the tank heater.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the black wires or the red wires from
the limit thermostat.
3. Check for continuity across the limit thermostat
terminals with an ohmmeter.
BLK to Contactor coil (All Models Except 230V CE Models) Red to Contactor Coil (230V CE Models)
BLK to Control Thermostat(All Models Except 230V CE Models) RED to Control Thermostat (230V CE Models)
FIG. 11 LIMIT THERMOSTAT TERMINALS
P1984
If continuity is present as described, the limit thermo­stat is operating properly. If continuity is not present as described, replace the limit thermostat.
Removal and Replacement:
1. Remove the wires from the limit thermostat termi-
nals.
2. Carefully slide the limit thermostat out from under
the retaining clip and remove the limit thermostat.
3. Carefully slide the new limit thermostat into the
retaining clip.
4. Refer to Fig. 11 and reconnect the wires.
Page 19
10067 040100
SERVICE (cont.)
LIQUID LEVEL BOARD AND LEVEL PROBE
FIG.12 LIQUID LEVEL BOARD AND
P2208.40
LEVEL PROBE
Location:
The liquid level board is located behind the lower
front access panel, to the right of center on the component bracket. The level probe is located on the right front of the upper component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the blue wire (T1) and the pink wire (T4).
3. Check the voltage across terminals (T2) and (T3) with the ON/OFF switch in the "ON" position. The indication must be: a) 120 volts for 120/208 and 120/240 volt, 3-wire with ground, single phase; b) 230 volts for 230 volt, 2-wire with ground, single phase; c) 208 volts for 208 volt, 2-wire with ground, single phase; d) 240 volts for 240 volt, 2-wire with ground, single phase.
5. Reconnect the blue wire to T1 on the liquid level board.
6. Carefully connect a piece of insulated jumper wire to T4. Keep the other end of this wire away from any metal surface of the brewer.
7. Touching the free end of the jumper to the brewer's frame simulates a "FULL" condition, preventing jumper from touching the brewer's frame simu­lates "NEED WATER" condition. Connect the brewer to the power source, simulate the conditions in the chart below while measuring the voltage between T1 and T3 0n the liquid level board. Repeat these several times. Keep in mind there is an approxi­mate five second delay for output to stabilize.
Model
120/208V &
Voltage ­Jumper Not Touching Frame
120V
Voltage ­Jumper Touching Frame
0
120/240V - 3­wire w/ground single phase
230V - 2-wire
230V
0
w/ground single phase
208V or 240V ­2-wire w/ground
208V or 240V
0 0
single phase
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5. If voltage is not present as described, refer to wiring diagrams and check the brewer wiring harness.
Page 20
10067 040100
SERVICE (cont.) LIQUID LEVEL BOARD AND LEVEL PROBE (cont.)
8. Disconnect the brewer from the power source and remove the jumper wire from T4.
If voltage is present as described, liquid level board is operating properly, proceed to #9. If voltage is not present as described, replace the liquid level board.
9. Reconnect the pink wire to T4.
10. Remove the two #8-32 screws securing the level probe to the component bracket.
11. Gently pull the probe out of the component bracket and inspect for corrosion. Replace if necessary.
12 Place the probe so that neither end is in contact
with any metal surface of the brewer.
13. Connect the brewer to the power source. Check the voltage across T1 and T3, refer to chart below. Keep in mind there is an approximate delay of five seconds for output to stabilize.
Model
Voltage ­Jumper Not Touching Frame
Voltage ­Jumper Touching Frame
14. Disconnect the brewer from the power source.
If voltage is present as described, reinstall the level probe, the liquid level board and level probe are operating properly. If voltage is not present as described, check the pink wire on the level probe from liquid level board termi­nal.
Removal and Replacement:
1. Remove all wires from the liquid level board.
2. Remove the #10-32 screw and flat washer secur­ing the protective shield to the component bracket.
3. Remove the #10-32 screw and internal tooth lockwasher securing the liquid level board to the component bracket.
4. Remove liquid level board and discard.
5. Install new liquid level board on component bracket and secure with a #10-32 screw and internal tooth lockwasher.
6. Install protective shield and secure with #10-32 screw and flat washer.
7. Refer to Fig. 13 and reconnect the wires.
120/208V & 120/240V - 3­wire w/ground single phase
230V - 2-wire w/ground single phase
208V or 240V ­2-wire w/ground single phase
120V
230V
208V or 240V
0
T1 BLU to Solenoid Valve
T2 BLK to ON/OFF Switch (All models except 230V-CE models­RED on CE Models)
T3 WHI to Main Harness
0
(120/208V and120/240V models) T3 RED to Main Harness (208V, 240V single phase
0 0
and three phase models) T3 BLK to Main Harness (230V two wire models)
T4 PIN to Level Probe
P1733
FIG.13 LIQUID LEVEL BOARD TERMINALS
Page 21
10067 040100
SERVICE (cont.) ON/OFF SWITCH
P2053.25
FIG.14 ON/OFF SWITCH
Location:
The ON/OFF switch is located on the left side of the
lower front panel.
Test Procedures:
1. Disconnect the brewer from the power source.
2. a)120/208V, 120/240V, 208V and 240V Models Remove the black wire on the ON/OFF switch from the fuse holder or circuit breaker and the red wire on the switch indicator light. b) 230V - CE Models - Remove the red wire on the ON/OFF switch from the fuse holder and the black wire on the switch indicator light.
3. Connect the brewer to the power source. With a voltmeter, check the voltage across the removed wire. The indication must be: a) 120 volts ac for 120/208 volt and 120/240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2-wire 230 volt models.
4. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the wires and proceed to #5 If voltage is not present as described, refer to the wiring diagrams and check the brewer wiring harness.
6. a) 120/208V, 120/240V, 208V and 240V Models ­Check for continuity across the terminals on the rear of the switch with the switch in the "ON" (upper) position. Continuity must not be present when the switch is in the "OFF" (lower) position. b) 230V - CE Models - Check for continuity across the center terminal (2) and the lower terminal (1) when the switch is in the "ON" (upper) position. Continuity must not present when the switch is in "OFF" (lower) position.
If continuity is present as described, 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 on the back side of the switch mounting bracket and gently push them through the opening.
3. Push the new switch into the opening and spread the clips to hold switch in the mounting bracket.
NOTE: ON 230V - CE models terminal (3) must be on
the top.
4. Refer to Fig. 15 and reconnect the wires.
BLK to On/Off Switch
BLK to On/Off Switch
BLK to Liquid Level Board L2
BLK to Start Switch
Step #6
BLK to Circuit Breaker or Fuse
WHI or RED to Indica­tor Light
120/208V, 120/240V, 208V and 240V MODELS
BLK from Indicator Light
RED to Fuse
Step #6
RED to Start Switch, Brew Timer & Liquid Level Board
5. Disconnect the wires on the ON/OFF switch.
Page 22
230V - CE Models
FIG. 15 ON/OFF SWITCH TERMINALS
P2120.50
10067 040100
SERVICE (cont.)
PUMP ASSEMBLY
FIG.16 PUMP ASSEMBLY
P2113.40
Location:
The pump is located on the right of the component
bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the black wire from the black lead on the pump and the white wire from the black lead on the pump.
3. With a voltmeter, check the voltage across the black wire and the white wire. Connect the brewer to the power source. The indication must be: a) 120 volts ac for 3-wire 120/208 volt and 120/ 240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2-wire 230 volt models.
2. Loosen the #8-32 screw (2) securing the clamp (3) on the fill tube (1) and slide the clamp (3) up the fill tube (1).
3. Disengage the fill tube (1) from the pump assem­bly (4).
4. Remove the four #8-32 screws (6) securing the pump assembly (4) to the component bracket (7).
5. Remove pump assembly (4).
6. Remove pump gasket (5) and inspect, replace if necessary.
7. Position gasket (5) on component bracket (7).
8. Install new pump assembly (4) on component bracket (7) and secure with four #8-32 screws (6).
9. Install fill tube (1) on pump assembly (4).
10. Slide clamp (3) down into position on the fill tube (1) and tighten screw (2).
11. Refer to Fig. 17 and reconnect the wires.
WHI from Brew Timer BLK from Brew Timer
1
2
3
6
4
5
7
4. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the wires to the pump. Install swing spout and position over the reservoir. Place the ON/OFF in the "ON" (upper) posi­tion and push the start switch and release. If pump does not run, replace the pump. If voltage is not present as described, refer to the wiring diagrams and check the brewer wiring harness.
Removal and Replacement (Refer to Fig. 17):
1. Disconnect the wires from the pump assembly.
Page 23
FIG.17 PUMP INSTALLATION
P1737
10067 040100
SERVICE (cont.) SELECTOR SWITCH (HALF BATCH OPTION)
ALL MODELS EXCEPT 230V CE MODELS
Removal and Replacement:
1. Remove the wires from the switch terminals.
2. Compress the clips on the back side of the switch mounting panel and gently push them through the opening.
3. Push the new switch into the opening and spread the clips to hold switch in the mounting panel.
4. Refer to Fig. 19 and reconnect the wires.
P2053.25
GRY to Brew Timer
PNK to Brew Timer
ALL MODELS EXCEPT 230V - CE MODELS
230V CE MODELS
P2117.25
FIG. 18 SELECTOR SWITCH (HALF BATCH)
Location:
The selector switch is located in the center of the front access panel at the base of the urn on all models except the 230V CE Models. The selector switch is located to the right of the front panel, above the start switch on the 230V CE Models.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the wires from the switch terminals.
3. Check for continuity across the switch terminals
with the switch in the "CLOSED" (bottom - half)
position. Continuity must not be present when the
switch is in the "OPEN" (top - full) position.
GRY to Brew Timer
PNK to Brew Timer
230V - CE MODELS
FIG.19 SELECTOR SWITCH TERMINALS
P2118.60
If continuity is present as described, the switch is operating properly. If continuity is not present as described, replace the switch.
Page 24
10067 040100
SERVICE (cont.)
SOLENOID
Location:
FIG. 20 SOLENOID
P2113.40
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 brewer wiring diagrams and check the wiring harness.
4. Disconnect the blue wire and the white wire, the blue wire and the red wire or blue wire and black wire from the solenoid terminals.
5. Check for continuity across the solenoid valve coil terminals.
If continuity is present as described, reconnect the wires to the solenoid. If continuity is not present as described, replace the solenoid valve.
The solenoid is mounted on the upper left rear of
the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. A) For 120/208 volt and 120/240 volt 3-wire, single phase models, disconnect the black wire from the liquid level board #2 and the white wire on the solenoid. Check the voltage across the black and the white wire with a voltmeter. Connect the brewer to the power source. The indication must be: a) 208 volts ac for 3-wire 120/208 volt models. b) 240 volts ac for 3-wire 120/240 volt models. B) For 208 volt, 240 volt 2-wire single phase models, disconnect the black wire from the liquid level board #2 and the red wire from the solenoid. With a voltmeter check the voltage across the black and red wires. Connect the brewer to the power source. The indication must be: a) 208 volts ac for 208 volt, 2-wire single phase models. b) 240 volts ac for 240 volt, 2-wire single phase models. C) For 230 volt - CE 2-wire single phase models, disconnect the red wire from the liquid level board #2 and the black wire from the solenoid. Check the voltage across the red wire and the black wire with a voltmeter. Connect the brewer to the power source. The indication must be 230 volts ac.
6. Check the solenoid valve for coil action. Connect the dispenser to the power source. Listen carefully in the vicinity of the solenoid valve for a "clicking" sound as the coil magnet attracts.
If the sound is heard as described and water will not pass through the solenoid valve, there may be a blockage in the water line before the solenoid valve or, the solenoid valve may require inspection for wear, and removal of waterborne particles. If the sound is not heard as described, replace the solenoid valve.
Removal and Replacement:
1. Remove the wires from the solenoid valve.
2. Turn off the water supply to the dispenser.
3. Disconnect the water inlet line from the connector on the solenoid valve.
4. Remove the #10-32 screws and the flat washers securing the solenoid to the component bracket.
5. Remove solenoid, connectors, air chamber and tank inlet tube as an assembly.
6. Remove the tank inlet tube grommet and discard.
7. Install new tank inlet tube grommet.
8. Install new solenoid assembly.
9. Install and secure solenoid assembly to the com­ponent bracket with a two #10-32 screws and flat washers.
Page 25
10067 040100
SERVICE (cont.)
SOLENOID
10. Install water inlet tube to connector on the sole­noid.
11. Turn on the water supply to the brewer.
12. Refer to Fig. 21 and reconnect the wires.
BLU from Liquid Level Board #1
230V - CE MODELS
FIG. 21 SOLENOID TERMINALS
WHI from Main Har­ness (120/208V and 120/240V Models)
RED from Main Har­ness (208V and 240V Models)
BLU from Liquid Level Board #1
BLK from Main Harness
P1741.30
Page 26
10067 040100
SERVICE (cont.)
START SWITCH (BREW)
Test Procedures:
1. Disconnect the brewer from the power source.
2. Remove the wires from the start switch terminals.
3. Check for continuity across the switch terminals when the switch is held in the lower position. Continuity must not be present when the switch is 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.
ALL MODELS EXCEPT 230V - CE MODELS
230V - CE MODELS
FIG. 22 START SWITCH (BREW)
Location:
P2053.25
Removal and Replacement:
1. Remove the wires from the switch terminals.
2. Compress the clips on the back side of the switch mounting panel and gently push them through the opening.
3. Push the new switch into the opening and spread the clips to hold switch in the mounting panel.
4. Refer to Fig. 23 and reconnect the wires.
BLU to Brew Timer
BLK from ON/OFF Switch
ALL MODELS EXCEPT 230V - CE MODELS
The brew start switch is located on the lower right side of the front access panel at the base of the urn on all models except 230 volt CE. On 230 volt CE models, the start switch is located on the lower right of the front access panel, beneath the selector switch.
Page 27
BLU to Brew Timer
RED from ON/OFF Switch
230V - CE MODELS
FIG.23 BREW START SWITCH TERMINALS
P2119.65
10067 040100
SERVICE (cont.)
TANK HEATERS
FIG. 24 TANK HEATER
Location:
Removal and Replacement:
1. Remove the wires or thermal fuses from the tank heater.
2. Remove the four #8-32 screws securing the tank heater to the component bracket.
3. Remove tank heater and gasket.
4. Position new tank heater and gasket on the com­ponent bracket and secure with four #8-32 screws.
5. Refer to Fig. 25 and reconnect the wires.
RED to Contactor T2 (120/ 208V, 120/240 Three Wire Single Phase, 208V and 240V Two Wire, Single Phase)
P2113.40
RED (Thermal Fuse) to T2 (230V-CE Models)
The tank heater is located on the front center of the
upper component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the wires from the tank heater.
3. Check for continuity across the tank heater termi­nals.
If continuity is present as described, proceed to #4. If continuity is not present as described, replace the tank heater.
BLK to Contactor T1 (All Models Except 230V-CE Models)
BLK (Thermal Fuse) to T1 (230V-CE Models)
P1746
FIG. 25 TANK HEATER TERMINALS
Page 28
10067 040100
SERVICE (cont.)
THERMAL FUSES (230V-CE MODELS ONLY)
FIG. 26 THERMAL FUSES
P2121.40
Location:
The thermal fuses are mounted on the tank heater
terminals.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the thermal fuse from the tank heater terminal and the contactor lead.
3. Check for continuity across the terminals on the ends of the thermal fuse.
If continuity is present as described, the thermal fuse is operating properly. If continuity is not present as described, replace the thermal fuse.
Removal and Replacement:
1. Disconnect the thermal fuse from the tank heater terminal and the contactor lead and discard.
2. Connect the new thermal fuse to the tank heater terminal and the contactor terminal.
Page 29
10067 040100
SERVICE (cont.)
TIMER (Early Models)
EARLY MODELS
FIG. 27 TIMER
Location:
P2114.40
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the wiring diagrams and check the brewer wiring harness.
5. With a voltmeter check the voltage across the sockets P1 (BLU) and P2 (see chart in #3) of the female connector on the main harness when the "ON/OFF" switch is in the "ON" (upper) position and the start switch pressed. Connect the brewer to the power source. The indication must be: a) 120 volts ac for 3-wire 120/208 volt and 120/ 240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2-wire 230 volt CE models.
6. Disconnect the brewer from the power source.
7. Reconnect the three pin connector from the main wiring harness to the connector on the timer.
The timer is located behind the front access panel
on the right side of the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the polarized, three pin connector from the brewer main harness and rotate the brew timer dial fully counterclockwise.
3. With a voltmeter check the voltage across sockets P2 and P3 (white and black wire or red wire) of the female connector on the main wiring harness when the "ON/OFF" switch is in the "ON" (upper) position. See chart below for P2 and P3 wires:
MODEL P2 P3 SRU-CE BLK RED SRUA RED BLK SRU WHI BLK
Connect the brewer to the power source. The indication must be: a) 120 volts ac for 3-wire 120/208 volt and 120/ 240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2- wire 230 volt CE models.
If voltage is present as described, proceed to #8. If voltage is not present as described, refer to the wiring diagrams and check the brewer wiring harness.
8. Disconnect the black and white wires to the pump.
9. With a voltmeter check the voltage across the black and white wires when the "ON/OFF" switch is in the "ON" (upper) position and the start switch pressed to the start position and released. Connect the brewer to the power source. The indication must be: a) 120 volts ac for 3-wire 120/208 volt and 120/ 240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2-wire 230 volt CE models.
If is present as described, the brew timer is operating properly. Reset the timer dial as required, to obtain the desired brew volume. If voltage is not present as described, replace the timer.
Page 30
10067 080200
SERVICE (cont.)
TIMER (Early Models)(cont.)
Removal and Replacement:
1. Separate all connectors between the brewer wir­ing harness and the timer.
2. Disconnect the timer leads from the pump leads.
3. Remove the two #8-32 screws securing the brew timer to the component bracket and remove timer.
4. Install new timer circuit board as described in
Model Timer
section on the following pages.
Late
5. Refer to Fig. 30 to reconnect the wires.
6. Install the Timer Setting Decal, provided with the timer replacement kit, on the back of the front access panel.
7. Adjust the timer as required. Refer to
Timer
section on the following pages.
Late Model
Three Pin Connector from Half/Full Batch Switch
To Three Pin Female Connector on Main Harness
BLK to Pump Lead
WHI to Pump Lead
FIG. 28 TIMER TERMINALS
P1751
Page 31
10067 080200
SERVICE (cont.)
DIGITAL BREW TIMER (Late Models)
LATE MODELS
P2208.40
FIG. 29 DIGITAL BREW TIMER
Location:
The timer is located inside the front of the trunk on
the top of the component bracket.
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 "ON/OFF" switch is in the "ON" position. Connect the brewer to the power source. The indication must be: a) 120 volts ac for 3-wire 120/208 volt and 120/ 240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2- wire 230 volt CE 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 har-
ness.
6. With a voltmeter, check the voltage across termi­nals TL1 and TL4 when the "ON/OFF" switch is in the "ON" 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 "ON/OFF" switch is in the "ON" position. Connect the brewer to the power source and press the "START" switch. The indica­tion must be as follows: a) 120 volts ac for 3-wire 120/208 volt and 120/ 240 volt models. b) 208 volts ac for 2-wire 208 volt models. c) 240 volts ac for 2-wire 240 volt models. d) 230 volts ac for 2- wire 230 volt CE 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. 30 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 32
10067 080200
SERVICE (cont.)
DIGITAL BREW TIMER (Late Models)
1. Modifying brew volumes. To modify a brew vol- ume, first check that the SET/LOCK switch is in the “SET” position on the circuit board.
To increase a brew volume, place the ON/OFF switch in the “ON” position, press and hold the START switch until you see three breaks in the water stream from the swing arm. Release the switch and press it again one or more times. (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.) 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 ON/OFF switch in the “ON” 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 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.
NOTE: 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. NOTE: Half-Batch and full batch settings must each be set separately.
3. Setting programming disable feature. If it be- comes 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.
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 ON/OFF switch in the “ON” position, press and hold the START 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”.
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BLU/BLK wire from TL5 to P1 WHI/GRN wire from TL4 to (BLK) Pump WHI/BLU wire from TL3 to (BLK) Pump WHI wire from TL2 to P2 BLK wire from TL1 to P3
J2 - Three Pin connector from Half/Full Batch Switch P2037
FIG. 30 DIGITAL TIMER TERMINALS
10067 080200
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10067 080200
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10067 080200
G 8
/BLK
WHI/BLU
T5 T3
T1
T4
T2
WHI/GRN
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10067 080200
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