Bunn Dual TF User Manual

OPERATING & SERVICE MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 529-6601 FAX: (217) 529-66442

Page 10TROUBLESHOOTING (cont.)Inconsistent beverage level in server.(cont.)Consistently high or low beveragelevel in server.Dripping from sprayhead.Wa

Page 11TROUBLESHOOTING (cont.)Weak beverageBrewer is making unusual noises.1. Type of paper filters2. Coffee3. Sprayhead4. Funnel loading5. Water temp

Page 12SERVICEThis section provides procedures for testingand replacing various major components used in thisbrewer should service become necessary.

Page 13SERVICE (cont.)BYPASS VALVELocation:The bypass valves are located inside the rightfront and the center front of the hood.Test Procedures:1. Dis

Page 14SERVICE (cont.)BREW SELECTOR SWITCHLocation:The brew selector switches are located in thefront left and right side of the hood.Test Procedure:T

Page 15SERVICE (cont.)BREW SELECTOR SWITCH (cont.)P991TANGRYPNKTo Left or Right TimerWHI/VIO to Left or RightBy-Pass ValveWHI/RED to Left or RightDisp

Page 16SERVICE (cont.)CONTACTOR ASSEMBLYLocation:The contactor assembly is located inside thehood just to the rear of the right dispense valve.Test Pr

Page 17SERVICE (cont.)CONTACTOR ASSEMBLY (cont.)Test Procedures : Electronic Control (Brewers w/Recovery Booster)1. Disconnect the brewer from the pow

Page 186. Gently remove the capillary bulb and grommetfrom the tank.7. Check the voltage across the black wires of thecontrol thermostat and the white

Page 19SERVICE (cont.)CONTROL THERMOSTAT (cont.)BLU to Left & Right Ready LightsBLU to RED Lead From Liquid Level Switch BLK to BLK Lead of Con

Page 2INTRODUCTIONThis equipment will brew two half-gallon, gallon, or gallon and three forths batches of coffee into awaitingservers at the push of a

Page 20SERVICE (cont.)DISPENSE VALVE (cont.)ELECTRONIC CONTROL ASSEMBLY10. Recovery BoosterRelay11. Contactor Assembly12. Bypass Valve13. Ready Light1

Page 21SERVICE (cont.)PROBLEM:LIQUID LEVEL CONTROL SYSTEM DOES NOT REFILLPROBLEM:LIQUID LEVEL CONTROL OVERFLOWSRETRYNOYESYESNOYESREPLACE CONTROL ASSEM

Page 22YESYESYESYESNONONONOYESNONOMEASURE VOLTAGEAT TANK HEATER (5)VOLTAGE PRESENTREPLACE TANKHEATER (5)LIMIT THERMOSTAT (6)OK?REPLACE LIMITTHERMOSTAT

Page 23SERVICE (cont.)ELECTRONIC CONTROLS (cont.)PROBLEM:WATER BOILSYESNONONONOREPLACE CONTROLASSEMBLY (1)REPLACE TRIAC (17) CHECK FOR SPLITTANK

Page 24SERVICE (cont.)ELECTRONIC CONTROL ASSEMBLY (cont.)ONCAUTION!Failure To Comply Voids Warranty!Hot Water Systems – Water Tank Will FillAutomatica

Page 25Test Procedure:1. Disconnect the brewer from the power source.2. Remove all wires from the switch terminals.3. Place the selector switch in the

Page 26Location:The level control board is located inside thefront of the brewer just left of center on the componentbracketTest Procedure:1. Disconne

Page 27SERVICE (cont.)LEVEL CONTROL BOARD AND LEVEL PROBE(Electro/mechanical only) (cont.)els and three wire 120/240 volt models.b.) 200 to 240 volts

Page 28SERVICE (cont.)Location:The ON/OFF switches are located on the frontof the hood just to the left and right of the startswitches.Test Procedure:

Page 29

Page 3Requires 2-wire, groundedservice rated 200 to 240 voltsac, 30 amp, single phase 50or 60 Hz.Requires 3-wire, grounded ser-vice rated 120/208 or 1

Page 30Location:The overflow protection switch is located in-side the hood on the center of the tank inside thecopper overflow cup.To test the overflo

Page 31Location:Electro/mechanical Controlled BrewersThe relays are located inside the hood, theright relay just to the right of the contactor in fron

Page 32REDBLK to BLK Lead on Contactor CoilBLK to BLK Lead on ThermostatWHI/RED to Left Dispense Valve WHI/BRN to Left Dispense ValveWHI/GRN to Right

Page 33SERVICE (cont.)SOLENOID VALVE (Inlet)Location:The solenoid valve is located inside the lowerright front of the brewer. Test Procedure:1. Discon

Page 34SERVICE (cont.)SOLENOID VALVE (Inlet) (cont.)P799VIO to Level Control Board T1 (Electro/mechanical)WHI/BLU to Control Assy #1 (Electronic)WHI t

Page 35wires, the tank heaters are operating properly.If continuity is not present as described, replace thetank heater(s).NOTE - If the tank heater r

Page 36Location:The timers are located inside the left front ofthe brewer on the upper part of the component bracket.Test Procedures:1. Disconnect the

Page 37SERVICE (cont.)Timers (Early Models)(cont.)P10702221.5111.52.5MINUTESMINUTESMINUTESP/N 24486-0000 120 VACBUNN-O-MATIC333445566782221.51.511

Page 38SERVICE (cont.)TIMERS (Late Models)P2194Location:The timers are located inside the left front of thebrewer on the upper part of the component b

Page 39J1J2TL3TL5TL4TL2TL1SETLOCKSET LOCKP2037SERVICE (cont.)TIMERS (Late Models)(cont.)LEFT TIMER RIGHT TIMERYEL WHI/YEL wire to TL5WHI/BRN WHI/GRN w

Page 4Electrical Hook-UpCAUTION – Improper electrical installation will damage electronic components.1. An electrician must provide electrical service

Page 4027201.0001B 5/96 © 1996 BUNN-O-MATIC CORPORATION120/208 VOLTS AC OR120/240 VOLTS AC3 WIREVIOPROBEPIN-201432LIQUIDLEVELBOARDBLKWHILIMIT T

Page 4127201.0002B 5/96 © 1996 BUNN-O-MATIC CORPORATION200 OR 240 VOLTS AC2 WIREVIOPROBEPIN-201432LIQUIDLEVELBOARDBLKLIMIT THERMOSTATOVERFLOW P

Page 42GRY27201.0003B 5/96 © 1996 BUNN-O-MATIC CORPORATION120/208 VOLTS AC OR120/240 VOLTS AC3 WIREDUAL -TF BREWER ECA W/SERVER SENSOR& TWO

Page 43GRY27201.0004B 5/96 © 1996 BUNN-O-MATIC CORPORATION200 OR 240 VOLTS AC2 WIREDUAL -ATF BREWER ECA W/SERVER SENSOR& TWO-GRINDER INTERF

Page 4427201.0005B 5/96 © 1996 BUNN-O-MATIC CORPORATION120/208 VOLTS AC OR120/240 VOLTS AC3 WIREVIOPROBEPIN-201432LIQUIDLEVELBOARD

Page 45GRY27201.0006B 5/96 © 1996 BUNN-O-MATIC CORPORATION120/208 VOLTS AC OR120/240 VOLTS AC3 WIREDUAL -TF BREWER ECA W/SERVER SENSOR& ONE

Page 4627201.0007B 5/96 © 1996 BUNN-O-MATIC CORPORATION200 OR 240 VOLTS AC2 WIREVIOPROBEPIN-201432LIQUIDLEVELBOARDBLKLIMIT THERMOSTATOVERFLOW P

Page 47GRY27201.0008B 5/96 © 1996 BUNN-O-MATIC CORPORATION200 OR 240 VOLTS AC2 WIREDUAL -ATF BREWER ECA W/SERVER SENSOR& ONE-GRINDER INTERF

Page 5INITIAL SET-UP (cont.)4. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature.5. Place an empty server

Page 6TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problemsencountered. If the prob

Page 7Remedy(A) Direction of flow arrow must bepointing towards brewer.(B) Remove the strainer/flow con-trol and check for obstructions. Clearor repla

Page 84. Overflow protection switch5. (A) Level control board & levelprobe. (Electro/mechanical con-trolled) (B) Electronic controls1. Brew Sel

Page 9TROUBLESHOOTING (cont.) (B) Control assembly (Electronic)3. Contactor (Brewers with Recov-ery booster)4. Tank heaters5. Triac assembly (Elec