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®
BUNN
HC-2
HC-3
(SERIAL # HC00025000 - UP)
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
27591.0000 6/00 ©1996 Bunn-O-Matic Corporation
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INTRODUCTION This equipment dispenses hot beverages on demand from powered product. It has two or three hoppers. The two and three hopper models may also dispense cold beverages from powdered product from their left dispense station. It is for indoor use only on a sturdy counter or shelf. WARRANTY 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 y
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USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protection. All notices are to be kept in good condition. Replace any unreadable or damaged labels. 26525.0000 00656.0000 00831.0000 12368.0002 11646.0000 27620.0000 27591 061500 3
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INITIAL SET-UP 1. Locate the drip tray assembly beneath the dispenser nested in the packing material. 2. Remove the drip tray and the drip tray cover and set them aside. 3. Remove the water strainer assembly from the drip tray and set it aside. 4. Remove the four legs from the drip tray, apply non-skid pads to the bottom of the legs and securely install the legs in the dispenser base. ELECTRICAL REQUIREMENTS CAUTION - The dispenser must be disconnected from the power source until specified in
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PLUMBING HOOK-UP 1. Securely attach the short piece of tubing on the water strainer assembly to the inlet fitting on the bottom of the dispenser. 2. Flush the water line and securely attach it to the flare fitting on the water strainer assembly. 3. Turn-on the water supply. INITIAL fill & heat CAUTION - The dispenser must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Turn-on the water supply and connect the dispenser to the pow
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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 #124
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Product will not dispense 1. No water Water lines and valves to the dispenser must be open. 2. No power or incorrect voltage to (A1) Check the terminal block for the dispenser 120 volts across the black and white terminals on two wire 120 volt dispenser. (A2) Check the terminal block for 120 volts across the red and white terminal and the black and white terminal on three wire 120/240 volt dispenser. (A3) Check the terminal block for 240 volt
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Product will not dispense (cont.) 9. Water strainer (A) Direction of flow arrow must be pointing towards dispenser. (B) Remove the flow control and check for obstructions. Clear or replace. 10. Lime build-up Inspect the tank assembly for CAUTION - Tank and tank compo- excessive lime deposits. Delime as nents should be delimed regularly required. depending on local water condi- tions. Excessive mineral build-up on stainless steel surfaces can
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TROUBLESHOOTING (cont.) REMEDY PROBLEM PROBABLE CAUSE Inspect the tank assembly for Dripping from dispense tip 1. Lime build-up excessive lime deposits. Delime as CAUTION - Tank and tank compo- required. nents should be delimed regularly depending on local water condi- tions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions result- ing in serious leaks. Remove the dispense solenoid 2. Dispense solenoid valve valve and clear any obstructions. (Hot or Cold) R
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TROUBLESHOOTING (cont.) PROBLEM REMEDY PROBABLE CAUSE Product overflows container 1. Dispense switch Refer to Service - Dispense Switch for testing procedures. See page 18 2. Dispense solenoid valve Remove the solenoid valve and (Hot or Cold) clear any obstructions. Rebuild or replace the valve if necessary. See page 30 or 31 Weak product 1. Water temperature Place an empty container beneath the dispense tip. Initiate a dispense cycle and check the water tempera- ture immediately below the disp
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TROUBLESHOOTING (CONT.) PROBLEM PROBABLE CAUSE REMEDY Dispenser is making unusual 1. Plumbing Lines Plumbing lines should not be rest- noises ing on the counter top. 2. Water Supply (A) The dispenser must be connected to a cold water line (B) Water pressure to the dispenser must not exceed 90 psi (620 kPa). Install a regulator if necessary to lower the working pressure to ap- proximately 50 psi (345 kPa). 3. Tank Heater Remove and clean lime off the tank heater. See page 33 Excess dust 1. Fan Re
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AUGER DRIVE COMPONENTS SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. The dispenser should be un- plugged when servicing, except when electrical tests are required and the test procedure spec
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SERVICE AUGER DRIVE COMPONENTS (cont.) 4 1 If voltage is present as described, proceed to #5. 2 If voltage is not present as described, refer to the wir- ing diagrams and check the dispenser wiring harness. 3 6 11 5. With the wires removed from the motor to be 5 tested. Check for continuity across the two ter- minals on the bottom of the auger motor. 13 If continuity is present as described, reconnect the wires to the terminals on the bottom of the auger 7 motor, the auger motor is operating pro
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5. Remove auger motor mounting bracket (16), SERVICE (cont.) auger motor (17) and dust seal (18) as an as- AUGER DRIVE COMPONENTS (cont.) sembly. 6. Remove dust seal (18) from auger motor (17). 7. Remove the three #8-32 screws securing the left 14. Install hopper assy (21) in the dispenser by slid- auger motor to the auger motor mounting bracket ing hopper assy in the guides on the hopper sup- or the four #8-32 screws securing the center and port plate (20) until the slot in the bottom rear r
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If voltage is not present as described, replace the SERVICE (cont.) ballast. BALLAST Removal and Replacement 1. Disconnect the wires from the ballast. 2. Remove the two #8-32 keps nuts securing the ballast to the dispenser base. 3. Remove and discard ballast. 4. Install new ballast over the two weld studs on the dispenser base and secure with two #8-32 keps nuts. 5. Refer to the illustration below when reconnect- ing the wires. BLK to Terminal Block WHI to Main Wiring Harness WHI & BLU to Door I
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SERVICE (cont.) Test Procedure Mechanical Thermostat CONTROL THERMOSTAT 1. Disconnect the dispenser from the power source. 2. Disconnect the black wire of the control thermo- stat from the black lead from the limit thermo- stat. 3. Remove bulb from the tank. 4. Check the voltage across black wire on the con- trol thermostat and the white pole on the termi- nal block with the tank heater switch in the “ON” lower position with a voltmeter. Connect the dis- penser to the power source. The indicatio
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9. Carefully bend the capillary tube so that the tube SERVICE (cont.) and bulb inside the tank are in the vertical posi- CONTROL THERMOSTAT (cont.) tion and away from any electrical connections. 10. Refer to the illustration below and reconnect the Removal and Replacement. wires. Mechanical Thermostat NOTE - The capillary tube must be clear of any electri- 1. Disconnect the wires from the thermostat. cal termination and not kinked. 2. Remove the thermostat capillary bulb by firmly Electronic The
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5. Disconnect the dispenser from the power source. SERVICE (cont.) DISPENSE SWITCH If voltage is present as described, proceed to #6. If voltage is not present as described, refer to the wir- ing diagram and check the dispenser wiring harness. 6. Check for continuity across the wires removed from the dispense switch with the switch in the “ON” pressed position. Continuity must not be present when the switch is in the “OFF” released position. If continuity is present as described, reconnect the c
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SERVICE (cont.) Removal and Replacement: 1. Remove hoppers from the dispenser. Refer to Fig. FAN 2 for hopper removal. 2. Remove the four #8-32 screws securing the hop- per mounting plate to the front panel and remove panel. 3. Remove the four screws securing the fan mount- ing plate to the dispenser front panel. 4. Lift fan mounting plate out of the front panel far enough so the fan leads can be disconnected from the main wiring harness. 5. Remove fan mounting plate, fan and exhaust tube as an
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a) 120 volts ac for two wire 120 volt models. SERVICE (cont.) b) 120 volts ac for three wire 120/208 volt or 120/ FROTHER AND WHIPPER MOTOR 240 volt models. c) 240 volts ac for two wire 240 volt models. 4. Disconnect the dispenser from the power source. If voltage is present as described, replace the motor. If voltage is not present as described, refer to the wir- ing diagrams and check the dispenser wiring harness. 1 2 12 P1203.45 FIG. 11 FROTHER AND WHIPPER MOTOR 11 Location: The frothers a
