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INTRODUCTION This equipment will brew a half-gallon batch of coffee into an awaiting decanter and dispense hot water on demand for other purposes. It has two warmers to keep the beverage at the right temperature. The brewer is only for indoor use on a sturdy counter or shelf. CONTENTS Introduction and Warranty ..................................................................... 2 User Notices .......................................................................................... 3 Electric
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ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. The brewer has an attached cordset and requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. PLUMBING REQUIREMENTS This brewer 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 regula
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INITIAL SET-UP CAUTION - The brewer must be unplugged throughout the Initial Set-up, except when specified in the instruc- tions. 1. Remove the top lid from the brewer. 2. Rotate the control thermostat knob fully counterclockwise to the “OFF” position and replace the top lid. 3. Insert an empty funnel into the funnel rails. 4. Place a decanter containing a small amount of water on the left warmer. 5. Plug in the brewer and place the On/Left switch in the upper position. Water will flow int
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ADJUSTING BREW VOLUMES(cont) 2. Setting batch sizes. To set a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. Press and hold the START or BREW switch until three distinct clicks are heard, and then release the switch. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory). View the level of the liquid being dispensed. When the desired level
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TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Services Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service person- nel. • All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the a
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Equipment will not operate 1. No power or incorrect voltage (A) Plug in brewer. (B) Check wall outlet for 120V ac (C) Check circuit breaker/fuse. Brew cycle will not start 1. No water Check plumbing and shut-off valves. 2. Water strainer/Flow Control (A) Direction of flow arrow must be pointing towards brewer. (B) Remove the strainer/Flow con- trol and check for obstructions. Clear or replace. 3. On/Left switch Refer to Service - On/Left swi
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Automatic refill will not operate 2. Liquid level control system Refer to Service - Liquid Level after drawing hot water.(cont.) Control system for testing proce- dures. See page 20. 3. Relay Refer to Service - Relay for test- ing procedures. See Page 23. 4. Solenoid valve Refer to Service - Solenoid valve for testing procedures. See page 25. Water flows into tank continuously 1. Solenoid valve Refer to Service - Solenoid valve (On/left switc
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Decanter warmer is not hot 1. Warmer switches (A) The decanter warmer switch must be in the upper position for the warmer to operate. (B) Refer to Service - On/Left or Right switch for testing proce- dures. See page 22 or 24. 2. Decanter warmers Refer to Service - Decanter Warmer for testing procedures. See page 18. Spitting or unusual steaming from 1. Control thermostat Refer to Service - Control Thermo- sprayhead stat for testing procedures
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in de- 3. Syphon System Water should flow freely from the canter (cont.) sprayhead for approximately twenty seconds after the brew solenoid has shut off and then stop flowing abruptly. The brewer must be level from side-to-side to syphon properly. Consistently high or low beverage 1. Brew timer adjustment Adjust the brew timer as required level in decanter. to achieve the recommended 64 oz. for each brew cycle. Dri
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY ® Weak beverage (cont.) 4. Funnel loading The BUNN paper filter should be centered in the funnel and the bed of ground coffee leveled by gentle shaking. 5. Water temperature Empty a decanter and place it on the left warmer. Insert an empty funnel into the funnel rails. Place the On/left switch in the upper position. Press the Start switch and check the water temperature immediately below the sprayhead with a thermometer. The reading should n
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SERVICE (cont.) BREW TIMER (early models) 6. Disconnect the in-line connectors on the black and white wires from the timer to the wiring harness. 7. With a voltmeter, check the voltage across the black and white wires when the On/Left switch is in the upper position and the Start switch is pressed to the lower position and released. Con- nect the brewer to the power source. The indica- tion must be 120 volts ac for approximately 20 seconds and then return to its previous indica- tion. 8. Disconn
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SERVICE (cont.) BREW TIMER (cont.)(late models) 5. With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the “ON/OFF” switch is in theh “ON” position. Connect the brewer to the power source. The indication must be 0 volts. If voltage is as described, proceed to #6. If voltage is not as described, disconnect the brewer from the power source and replace the timer. 6. With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the “ON/OFF” switch is in the “ON” positi
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SET LOCK SERVICE (cont.) BREW TIMER (cont.)(late models) NOTE: Several ounces of water will continue to sy- 1. Modifying brew volumes. To modify a brew vol- phon from the tank after turning the switch “OFF”. ume, first check that the SET/LOCK switch is in the The brewer remembers this volume and will continue “SET” position on the circuit board. to brew batches of this size until the volume setting procedure is repeated. To increase a brew volume, place the ON/OFF NOTE: When brewing coffee, volu
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SERVICE (cont.) LIQUID LEVEL CONTROL SYSTEM from any metal surface of the brewer. 6. With a voltmeter, check the voltage across termi- nals 1 & 3 when the On/Left switch is in the upper position. Connect the brewer to the power source. The indication must be 120 volts ac after a delay of approximately 5 seconds. 7. Touch the end of the jumper wire to the brewer housing. The indication must be zero. 8. Move the jumper wire away from the brewer hous- ing. The indication must again be 120 volts ac
