Bunn HC-3 Draining the HOT Water Tank, Hopper Dispense Rate of Product, Troubleshooting

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DRAINING THE HOT WATER TANK

CAUTION - The dispenser must be disconnected from the power source throughout these steps.

1.Disconnect the dispenser from the power source.

2.Open front door and place tank heater switch in the “OFF” (upper) position.

3.Shut-off and disconnect the incoming water supply.

4.Remove the top panel.

5.Gently remove one of the grommets from the tank lid.

6.Insert a tube to the bottom of the tank and syphon ALL of the water out. (Bunn-O-Matic has a syphon assembly #12440.0000 available for this purpose.)

NOTE - The dispenser must be refilled using the INITIAL FILL & HEAT steps before reconnecting to the power source.

HOPPER DISPENSE RATE OF PRODUCT

1.Hopper dispense rate with 22 tooth gear and auger wire is approximately 4 to 6 grams per second.

2.Hopper dispense rate with 22 tooth gear and auger wire with optional restrictor is approximately 3 to 5 grams per second.

3.Hopper dispense rate with optional 32 tooth gear and auger wire is 6 to 9 grams per second.

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 or 240 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 unit is heated at all times. Keep away from combustibles.

WARNING – • Exercise extreme caution when servicing electrical equipment.

•Unplug the dispenser when servicing, except when electrical tests are specified.

•Follow recommended service procedures

•Replace all protective shields or safety notices

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Contents Bunn HC-2 Serial # HC00025000 UPWarranty IntroductionUser Notices 12368.000227620.0000 Electrical HOOK-UP Initial SET-UPElectrical Requirements Plumbing RequirementsDispenser USE CleaningAdjustments Cold Beverage SET-UP OptionalTroubleshooting Draining the HOT Water TankHopper Dispense Rate of Product Troubleshooting Problem Probable Cause RemedyProblem On stainless steel surfaces can Problem Probable CauseDripping from dispense tip Lime build-up Ing in serious leaks30 or Weak product Water temperatureTesting procedure. See Tip with a thermometerTroubleshooting Problem Probable Cause RemedyContents ServiceComponent Access Auger Drive ComponentsWasher Auger Motor Locknut Dust Seal Shoulder Screw Auger Drive ComponentsIf voltage is present as described, proceed to #5 Hopper AssyService Right HC-2Test Procedure BallastLocation Location Mechanical Thermostat Remove temperature probe from the tankControl Thermostat Electronic Thermostat OptionalControl Thermostat Thermostat TerminalsDispense Switch Dispense SwitchTest Procedures FANRing Frother and Whipper MotorSteam Collector #6-32 Screw Mixing Chamber Pull the mixing chamber 2 out of the whipper chamberFrother and Whipper Motor Whipper Motor TerminalsHopper Delay Board Reconnect the eight pin connector to the hopper delay boardHOT/COLD Switch Optional Disconnect the wires from the switch termi- nalsLamp Replacement Refer to Fig Lamp HolderDoor Assy Service Level Control Board and Level Probe Level Control Board and ProbeLevel Board Terminals Limit ThermostatOverflow Protection Switch Overflow Protection SwitchRUN/RINSE Switch RUN/RINSE SwitchSolenoid Valve Cold Water Optional Cold Water Solenoid ValveCold Water Solenoid Terminals Solenoid Valves DispenseSolenoid Valves Dispense Disconnect the water line from the solenoid valveSolenoid Valve Inlet Solenoid Valve Inlet Tank HeaterRefer to when reconnecting the wires to the tank heater Tank Heater SwitchTank Heater Tank Heater Switch Tank Heater Switch TerminalsTransformer 240V TWO Wire MODELSONLYcontSchematic Wiring Diagram HC-2, & HC-3 Schematic Wiring Diagram HCA-2, & HCA-3
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