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Bunn SH - page 1
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 B UNN ® CAUTION CAUTION DISCARD DECANTER DISCARD DECANTER IF: IF: . C R A C K E D . CRACKED . S C R A T C H E D . SCRATCHED . B O IL E D D R Y . BOILED DRY . H E A T E D W ...
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Bunn SH - page 2
Page 2 W ARRANTY 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 f ...
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Bunn SH - page 3
Page 3 00656.0000 ! WARNING HOT WATER 00831.0000 00658.0000 20201.5600 USER NOTICES The notices on this brewer should be kept in good condition. Replace unreadable or damaged labels. 32248 100500 INTRODUCTION This brewer utilizes BUNN® DBC™ technology to control most of its functions. The controller is factory set to brew in accordance with acce ...
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Bunn SH - page 4
Page 4 32248 100500 PLUMBING HOOK-UP 1. Flush the water line and securely attach it to the flare fitting located on bottom of brewer. 2. Turn on the water supply. PLUMBING REQUIREMENTS This brewer must be connected to a cold water system with operating pressure between 20 and 90 psi (138 and 620 kPa) from a 1 ⁄ 2 " or larger supply line. A s ...
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Bunn SH - page 5
Page 5 INITIAL SET -UP CAUTION – The brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Insert an empty funnel into the funnel rails of one of the brew stations. 2. Place an empty server under the funnel. 3. Connect the brewer to the power source. Water will begin flowing ...
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Bunn SH - page 6
Page 6 32248 100500 DBC CONTROLLER General This brewer utilizes BUNN® DBC™ technology to control most of its functions. The controller is factor y set to brew in accordance with accepted coffee industr y standards, yet may be customized by the owner to achieve a variety of coffee flavor profiles. All user -accessible features of the controller a ...
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Bunn SH - page 7
Page 7 32248 100500 Setting or adjusting the brewer’ s controls Refer to the function list for the accessible screen numbers and their values. Scroll to the desired function screen and change the value by pressing either the “+” or “–“ keys. The change will not be entered into the programming until you move to another screen by scrollin ...
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Bunn SH - page 8
Page 8 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 ...
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Bunn SH - page 9
Page 9 Brew cycle will not start (cont.) Automatic refill will not operate Beverage level will not adjust (Selector switch in any position) Remedy 4. Start switch 5. Dispense valve 6. Brew selector switch 7. Defective DBC 1. No water 2. Water strainer 3. Solenoid valve 4. Overflow protection switch 5. Defective DBC 1. Brew Selector switch Refer to ...
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Bunn SH - page 10
Page 10 Water flows into tank continuously . Water from tank is not hot 1. Solenoid valve 2. Defective DBC 3. Overflow protection switch 1. Limit thermostat CAUTION - Do not eliminate or by- pass limit thermostat. Use only B.O.M. part #23717.0001 2. Defective DBC 3. Tank heaters 4. Tank not filled with water, dry plug protection Refer to Service - ...
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Bunn SH - page 11
Page 11 TROUBLESHOOTING (cont.) Spitting or unusual steaming from sprayhead or airvents. Inconsistent beverage level in server. Consistently high or low beverage level in server. Dripping from sprayhead. Water overflows server. 1. Lime build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water conditions. Exc ...
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Bunn SH - page 12
Page 12 TROUBLESHOOTING (cont.) Water overflows filter (cont.) Beverage overflows server. Weak beverage 2. Type of paper filters 3. No sprayhead 1. Beverage left in server 2. Volume adjustment needed 3. Dispense valve 1. Type of paper filters 2. Coffee 3. Sprayhead 4. Funnel loading 5. Water temperature BUNN ® paper filters should be used for prop ...
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Bunn SH - page 13
Page 13 TROUBLESHOOTING (cont.) Brewer is making unusual noises. Server will not heat 1. Solenoid valve 2. Plumbing lines 3. Water supply 4. Tank heaters 1. Circuit breaker 2. Receptacle Contacts 3. Transformer 4. Rectifier Remedy Probable Cause Problem The nut on back of the solenoid must be tight or it will vibrate during operation Plumbing lines ...
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Bunn SH - page 14
Page 14 C A U T I O N CAUTION D I S C A R D D E C A N T E R DISCARD DECANTER I F : IF: . C R A C K E D . CRACKED . S C R A T C H E D . SCRATCHED . B O I L E D D R Y . BOILED DRY . H E A T E D W H E N E M P T Y . HEATED WHEN EMPTY . U S E D O N H IG H F L A M E . USED ON HIGH FLAME . O R E X P O S E D E L E C T R IC . OR EXPOSED ELECTRIC E L E M E N ...
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Bunn SH - page 15
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Bunn SH - page 16
Page 16 SERVICE (cont.) BREW SELECTOR SWITCH Location: The brew selector switches are located in the front left and right side of the hood. Test Procedure: Timer: Left or Right 1. Disconnect the brewer from the power supply. 2. Separate the connector on the selector switch harness from the brew timer circuit board. 3. Carefully slide the plastic co ...
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Bunn SH - page 17
Page 17 P2233 FIG. 5 BREW SELECTOR SWITCH TERMINALS BREW SELECTOR SWITCH (cont.) SERVICE (cont.) Removal and Replacement: 1. Disconnect the connector on the selector switch harness from the DBC controller. 2. Disconnect wires from the selector switch, inter- face socket and dispense valve. 3. Loosen the set screw on the switch knob. 4. Remove the 9 ...
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Bunn SH - page 18
Page 18 CIRCUIT BREAKERS ...
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Bunn SH - page 19
Page 19 SERVICE (cont.) DBC DISPLAY 32248 100500 CAUTION D IS C A R D D E C A N T E R DISCARD DECANTER IF : IF: . CR A CK ED . CRACKED . SC R A TC HED . SCRATCHED . BO ILED DR Y . BOILED DRY . H EA TED WHE N EM PTY . HEATED WHEN EMPTY . USED ON H IG H FLA ME . USED ON HIG H FLAME . O R EXPO SED EL ECT RI C . OR EXPOSED ELECTRIC EL EM ENTS ELEMENTS ...
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Bunn SH - page 20
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Bunn SH - page 21
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Bunn SH - page 22
Page 22 SERVICE (cont.) FUNNEL LOCK SOLENOID 32248 100500 FIG. 14 FUNNEL LOCK SOLENOID P2232 Location: The Funnel Lock Solenoids are located inside the hood and to the front right of each dispense valve. Test Procedures: 1. Disconnect the dispenser from the power source. Removal and Replacement: ...
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Bunn SH - page 23
Page 23 SERVICE (cont.) GRINDER INTERFACE CIRCUIT BOARD 32248 100500 FIG. 16 GRINDER INTERFACE CIRCUIT BOARD P2232 Location: The Grinder Interface Circuit Board is located inside the trunk housing on a bracket just below the Tank Assy. Test Procedures: 1. Disconnect the dispenser from the power source. Removal and Replacement: ...
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Bunn SH - page 24
Page 24 GRINDER SELECTOR SWITCH FIG. 18 GRINDER SELECTOR SWITCH C A U T I O N CAUTION D I S C A R D D E C A N T E R DISCARD DECANTER I F : IF: R A C K E D . CRACKED C H E D . SCRATCHED Y . BOILED DRY M P T Y . HEATED WHEN EMPTY . USED ON HI GH FLAME . OR EXPOSED ELECTRIC ELEMENTS FAILURE TO COMPLY RISKS INJURY PN: 6 58 198 5 BUNN-O-M ATIC CORPORATI ...
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Bunn SH - page 25
Page 25 Location: The limit thermostat is located inside the hood on the tank lid just to the left of the right tank heater. Test Procedure: 1. Disconnect the brewer from the power supply. 2. Disconnect the black wires from the limit thermo- stat. 3. Check continuity across the limit thermostat ter- minals with an ohm meter If continuity is present ...
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Bunn SH - page 26
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Bunn SH - page 27
Page 27 SERVICE (cont.) RECEPTACLE ASSEMBLIES ...
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Bunn SH - page 28
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Bunn SH - page 29
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Bunn SH - page 30
Page 30 SERVICE (cont.) START/STOP SWITCHES Location: The momentary START/STOP switches are lo- cated in front of hood just left and right of center. Test Procedure: 1. Disconnect the brewer from the power source. P2235 CAUTION DISCARD DECANTER DISCARD DECANTER IF: IF: . C R A C K E D . CRACKED . S C R A T C H E D . SCRATCHED . B O IL E D D R Y . B ...
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Bunn SH - page 31
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Bunn SH - page 32
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Bunn SH - page 33
Page 33 FIG. 36 TRANSFORMER TERMINALS ...
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Bunn SH - page 34
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