Manuale d’uso / di manutenzione del prodotto DUAL TM (Serial # DUAL010000 - Up) del fabbricante Bunn
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BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www .bunnomatic.com OPERA TING & SER VICE MANU AL C A U T I O N : W A R M E R S A N D S U R F A C E S A R E H O T CAUTION D IS C A R D D E C A N T E R IF : .
Page 2 INTRODUCTION This equipment will brew two half-gallon, gallon, or gallon and a half batches of coffee into awaiting servers at the push of a button. The brewer is also equipped with a hot water faucet for allied beverage use and is designed to interface with a BUNN ® Grinder.
Page 3 Requires 2-wire, grounded service rated 200 to 240 volts ac, 30 amp, single phase 50 or 60 Hz. Requires 3-wire, grounded service rated 120/208 or 120/ 240 volts ac, 30 amp, single phase, 60 Hz. 120V A.C. 120V A.C. 120V A.C. 208 or 240V A.C. L2 RED L2 RED WHITE NEUTRAL L1 BLACK L1 BLACK 200 or 240V A.
Page 4 CAUTION – Improper electrical installation will damage electronic components. 1. An electrician must provide electrical service as specified. 2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.
Page 5 27040 032201 Models with electro/mechanical thermostats: Rotate the control thermostat knob fully clockwise to the “ON” position and replace the front panel. 4. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature.
Page 6 27040 032201 OPERA TING CONTROLS BREW SELECTOR SWITCH (Triple - set timer models only) Placing the switch in the 1 ⁄ 2 Gal, 1 Gal, or 1 1 ⁄ 2 Gal position selects the amount of coffee to be brewed in subsequent brew cycles. Repositioning this switch after a brew cycle has been initiated does not change the brew batch in progress.
Page 7 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.
Page 8 TROUBLESHOOTING (cont.) Problem Brew cycle will not start (cont.) Automatic refill will not operate Remedy Refer to Service - ON/OFF switch for testing procedures. See page 31 Refer to Service - Start switch for testing procedures. See page 36 Refer to Service - Timer for testing procedures.
Page 9 TROUBLESHOOTING (cont.) Problem Beverage level will not adjust (Selector switch in any position) Water flows into tank continuously . Water flows into tank continuously (ON/OFF switch "ON"). Water from tank is not hot Probable Cause 1.
Page 10 TROUBLESHOOTING (cont.) Problem Water from tank is not hot (cont.). Server warmer is not hot. Spitting or unusual steaming from sprayhead or airvents. Inconsistent beverage level in server. Probable Cause 6. Relay (Brewers with Recovery Booster) 1.
Page 11 TROUBLESHOOTING (cont.) Problem Inconsistent beverage level in server (cont.). Consistently high or low beverage level in server. Dripping from sprayhead. Water overflows filter. Beverage overflows server. Weak beverage. Probable Cause 3. Dispense valve 1.
Page 12 TROUBLESHOOTING (cont.) Problem Weak beverage (cont.) Brewer is making unusual noises. Probable Cause 3. Sprayhead 4. Funnel loading 5. Water temperature 1. Solenoid (Inlet) 2. Plumbing lines 3. Water supply 4. Tank Heaters 5. Contactor Remedy B.
Page 13 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary.
Page 14 SERVICE (cont.) BYPASS VALVE Location: The bypass valves are located inside the right front and the center front of the hood. Test Procedures: 1. Disconnect the brewer from the power source and place a server beneath the funnel. 2. Check the water level in the tank to confirm that it is within 1/2" from the top of the tank.
Page 15 SERVICE (cont.) BREW SELECTOR SWITCH Location: The brew selector switches are located in the front left and right side of the hood. Test Procedure: 1. Disconnect the brewer from the power supply. 2. Separate the connector on the selector switch harness from the brew timer circuit board.
Page 16 SERVICE (cont.) P776 27040 032201 To Left or Right Timer TAN GRY PNK WHI/VIO to Left or Right By-Pass Valve WHI/RED to Left or Right Dispense Valve GRY to Left or Right Selector Switch to GRY .
Page 17 SERVICE (cont.) CONTACTOR ASSEMBLY Location: The contactor assembly is located inside the hood just to the rear of the right dispense valve. Test Procedures: Mechanical Thermostat (Brewers with or without Recovery Booster) 1. Disconnect the brewer from the power source.
Page 18 SERVICE (cont.) CONTACTOR ASSEMBLY (cont.) P778 27040 032201 Test Procedures : Electronic Control (Brewers w/Recovery Booster) 1. Disconnect the brewer from the power source. 2. Disconnect the gray wire from the black wire on the rear of the contactor coil and white /brown wire from the black wire on the front of the contactor coil.
Page 19 b.) 200 to 240 volts ac for two wire 200 or 240 volt models. 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 brewer wiring harness.
Page 20 P780 SERVICE (cont.) 27040 032201 Removal and Replacement: 1. Remove wires from the control thermostat. 2. Remove the thermostat capillary bulb by firmly pulling up on the capillary tube at the tank lid. This will disengage the grommet from the tank lid.
Page 21 . M I N U T E S B U N N - O- M A T I C P / N 2 6 2 0 - 1 2 0 V A C . M I N U T E S B U N N - O- M A T I C P / N 2 6 2 0 - 1 2 0 V A C.
Page 22 SERVICE (cont.) Location: The electronic control assembly (1) is located inside the lower left front on the component bracket of the brewer. Access will also be needed to the tempera- ture sensor (8), liquid level probe (7) located on the tank lid and to the triac assembly (17) located beneath the tank.
Page 23 SERVICE (cont.) PROBLEM: LIQUID LEVEL CONTROL SYSTEM DOES NOT REFILL PROBLEM: LIQUID LEVEL CONTROL OVERFLOWS RETRY NO YES YES NO YES REPLACE CONTROL ASSEMBLY (1) DRAIN CUP (4) OVERFLOW ? OVERF.
Page 24 YES YES YES YES NO NO NO NO YES NO NO MEASURE VOLTAGE AT TANK HEATER (5) VOLTAGE PRESENT REPLACE TANK HEATER (5) LIMIT THERMOSTAT (6) OK ? REPLACE LIMIT THERMOSTAT (6) REPLACE CONTROL ASSEMBLY.
Page 25 SERVICE (cont.) ELECTRONIC CONTROLS (cont.) PROBLEM: WATER BOILS YES NO NO NO NO REPLACE CONTROL ASSEMBLY (1) REPLACE TRIAC (17) CHECK FOR SPLIT TANK HEATER (5) DRAIN CUP (4) RETRY LED (13)(15) ON WHILE BOILING DISCONNECT BLUE WIRE FROM CONTROL BOARD PIN #7 RETRY STILL BOILING ? REPLACE CONTROL ASSEMBLY (1) assembly (1).
Page 26 SERVICE (cont.) ELECTRONIC CONTROL ASSEMBLY (cont.) O N CAUTION ! F ailu re To Com p ly V o id s W a rra n t y! Ho t W a te r S y s te m s – W a te r T a n k W ill F ill A u to m a tic a lly.
Page 27 P787 SERVICE (cont.) ELECTRONIC CONTROL ASSEMBLY (cont.) 11. Install new triac/heat sink assembly on right tank mounting bracket. 12. Route the wires up around the rear of the brewer. 13. Reinstall the bottom cover, four feet, tank mount- ing brackets and triac/heat sink to the bottom of the tank using four #10-32 keps nuts.
Page 28.
Page 29 SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE (Electro/ mechanical only) (cont.) 15. Move the probe's flat end to the brewer housing. The indication must be 0. 16. Move the probe's flat end away from the brewer housing. The indication should again be: a.
Page 30 SERVICE (cont.) If voltage is present as described, reconnect the black wire to the limit thermostat from the terminal block, the limit thermostat is operating properly. If voltage is not present as described, refer to the Wiring Diagrams and check brewer wiring harness.
Page 31 SERVICE (cont.) Location: The ON/OFF switches are located on the front of the hood just to the left and right of the start switches. Test Procedure: 1. Disconnect the brewer from the power source. 2. Viewing the switch from the back remove the white or red wire from the upper right terminal and the black wire from the center terminal.
Page 32 Location: The overflow protection switch is located inside the hood on the center of the tank inside the copper overflow cup. To test the overflow protection switch, access will also be needed to the level control board or electronic control assembly and terminal block.
Page 33 ! C A U T I O N H O T W A T E R . M IN U T E S B U N N- O-MAT IC P /N 2 62 0- 12 0 V A C . M IN U T E S B U N N - O-MAT IC P /N 26 20 - 1 20 V A C ST ART O N / W ARM E R S EL EC T O R R E AD Y.
Page 34 RED BLK to BLK Lead on Contactor Coil BLK to BLK Lead on Thermostat WHI/RED to Left Dispense Valve WHI/BRN to Left Dispense Valve WHI/GRN to Right Dispense Valve BLU to BLU Lead from Thermosta.
Page 35 SERVICE (cont.) SOLENOID VALVE (Inlet) ! C A U T I O N H O T W A T E R . M INU T E S B UNN - O-MA TIC P/N 26 20- 12 0 V AC . M IN UT E S B U NN - O-MATIC P /N 26 20- 120 V A C S T A RT RE A DY.
Page 36 START ON / W AR MER SELECTOR READY R EADY ON / W AR ME R START 1 1 ⁄ 2 g a l 1 g a l 1 ⁄ 2 g a l SEL EC TOR 1 1 ⁄ 2 g a l 1 g a l 1 ⁄ 2 g a l P792 START SWITCHES Location: The momentary start switches are located in front of hood just left and right of center.
Page 37 tank heater(s). NOTE - If the tank heater remains unable to heat, remove and inspect the heater for cracks in the sheath. Electronic Models: 1. Disconnect the brewer from the power source. 2. Disconnect wires from heater(s). 3. Check for continuity across the tank heater termi- nals.
Page 38 Location: The timers are located inside the left front of the brewer on the upper part of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the wires from the timer terminals TL3, TL4 and TL5 and rotate the dial(s) fully counterclockwise.
Page 39 . MINUTES B UNN-O-MATIC P/N 2620- 120 VAC . MINUTES BUNN-O-M ATIC P/N 2620- 120 VAC WHI/VIO TL1 to Right ON/OFF Switch WHI/VIO TL1 to Right Warmer Element WHI/RED TL1 to Left ON/OFF Switch WHI.
Page 40 SERVICE (cont.) Timers (Early Models)(cont.) P847 . M I N U T E S B U N N - O - M A T IC P /N 2 6 2 0 - 1 2 0 V A C . M IN U T E S B U N N - O -M A T I C P / N 2 6 2 0 - 1 2 0 V A C WHI/VIO TL.
Page 41 27040 032201 SERVICE (cont.) TIMERS (Late Models) P2194 Location: The timers are located inside the left front of the brewer on the upper part of the component bracket. Test Procedure. NOTE: Do not remove or install wires while timer board is installed.
Page 42 27040 032201 P2037 SERVICE (cont.) TIMERS (Late Models)(cont.) LEFT TIMER RIGHT TIMER YEL WHI/YEL wire to TL5 WHI/BRN WHI/GRN wire to TL4 ORA WHI/ORA wire to TL3 WHI WHI wire to TL2 (120V Two Pole, 120/208V or 120/240V Three Pole Terminal Block) RED RED wire to TL2 (200V or 240V Two Pole Terminal Block) WHI/RED WHI/VOI wire to TL1 1.
Page 43 SERVICE (cont.) WARMER ELEMENTS WHI/VIO to Right Timer TL1 WHI to Terminal Block (White Insert on Three Pole Terminal Blocks or Red Insert on Two Pole Terminal Blocks) WHI or Red to Left Warme.
Page 44 120/208 VOLTS AC OR 120/240 VOLTS AC 3 WIRE R T S E L E C T O R S W VIO PROBE PIN-20 1 4 3 2 LIQUID LEVEL BOARD BLU BLK K1 WHI LIMIT THERMOSTAT SOL WHI WHI OVERFLOW PROTECTION SW RED RED SW. & THERMOSTAT READY INDICATORS OPTIONAL RECOVERY BOOSTER BLK BLU K2 N.
Page 45 R T S E L E C T O R S W VIO PROBE PIN-20 1 4 3 2 LIQUID LEVEL BOARD BLU K1 RED SOL RED RED SW. & THERMOSTAT READY INDICATORS OPTIONAL RECOVERY BOOSTER BLK BLU K2 N.O. K3 N.O. RED SCHEMATIC WIRING DIAGRAM DUAL-A & -B BREWER (W/TWO-GRINDER INTERFACE) GRN/YEL RED-12 K1 N.
Page 46 BLK-12 BLU-12 SCHEMATIC WIRING DIAGRAM DUAL BREWER ECA (W/TWO-GRINDER INTERFACE) R T S E L E C T O R S W WHI WHI/ORA WHI/VIO WHI/GRN WHI/YEL WHI WHI/RED WHI/GRN L1 N TANK HEATERS (TWO) BLK 1 R.
Page 47 SCHEMATIC WIRING DIAGRAM DUAL-A & -B BREWER ECA (W/TWO-GRINDER INTERFACE) R T S E L E C T O R S W RED WHI/ORA WHI/VIO WHI/GRN WHI/YEL RED WHI/RED WHI/GRN L1 GRN/YEL TANK HEATERS (TWO) BLK .
Page 48 120/208 VOLTS AC OR 120/240 VOLTS AC 3 WIRE R T S E L E C T O R S W VIO PROBE PIN-20 1 4 3 2 LIQUID LEVEL BOARD BLU BLK K1 WHI LIMIT THERMOSTAT SOL WHI WHI OVERFLOW PROTECTION SW RED RED SW. & THERMOSTAT READY INDICATORS OPTIONAL RECOVERY BOOSTER BLK BLU K2 N.
Page 49 BLK-12 BLU-12 SCHEMATIC WIRING DIAGRAM DUAL BREWER ECA (W/ONE-GRINDER INTERFACE) R T S E L E C T O R S W WHI WHI/ORA WHI/VIO WHI/GRN WHI/YEL WHI WHI/RED WHI/GRN L1 N TANK HEATERS (TWO) BLK 1 R.
Page 50 R T S E L E C T O R S W VIO PROBE PIN-20 1 4 3 2 LIQUID LEVEL BOARD BLU K1 RED SOL RED RED SW. & THERMOSTAT READY INDICATORS OPTIONAL RECOVERY BOOSTER BLK BLU K2 N.O. K3 N.O. RED SCHEMATIC WIRING DIAGRAM DUAL-A & -B BREWER (W/ONE-GRINDER INTERFACE) GRN/YEL RED-12 K1 N.
Page 51 SCHEMATIC WIRING DIAGRAM DUAL-A & -B BREWER ECA (W/ONE-GRINDER INTERFACE) R T S E L E C T O R S W RED WHI/ORA WHI/VIO WHI/GRN WHI/YEL RED WHI/RED WHI/GRN L1 GRN/YEL TANK HEATERS (TWO) BLK .
Page 52 WHI/GRN WHI/GRN WHI/RED WHI/RED RT START SW BLK BLK LT START SW BLK GRN BLK YEL BLK RED BLK PNK TAN GRY WHI WHI RED RED GRY PNK PNK RED WHI PNK RED ORA YEL VIO BLU WHI/RED WHI/RED WHI WHI WHI BLK TAN BLU WHI/BLU 10864.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Bunn DUAL TM (Serial # DUAL010000 - Up) è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Bunn DUAL TM (Serial # DUAL010000 - Up) - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Bunn DUAL TM (Serial # DUAL010000 - Up) imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Bunn DUAL TM (Serial # DUAL010000 - Up) ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Bunn DUAL TM (Serial # DUAL010000 - Up), ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Bunn DUAL TM (Serial # DUAL010000 - Up).
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Bunn DUAL TM (Serial # DUAL010000 - Up). Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Bunn DUAL TM (Serial # DUAL010000 - Up) insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
