1. Manuals
  2. Brands
  3. Bunn Manuals
  4. Coffee Maker
  5. HC-2 HC-3
  6. Operating & service manual

Bunn HC-2 HC-3 Operating & Service Manual

Bunn hc-2 hc-3
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
BUNN
The information in this manual
OPERATING & SERVICE MANUAL
27591.0000 6/00 ©1996 Bunn-O-Matic Corporation
DISCONTINUED VERSION
is no longer current.
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
®
HC-2
HC-3
(SERIAL # HC00025000 - UP)

Advertisement

Table of Contents
loading

Related Manuals for Bunn HC-2 HC-3

Summary of Contents for Bunn HC-2 HC-3

  • Page 1 (SERIAL # HC00025000 - UP) DISCONTINUED VERSION The information in this manual is no longer current. 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...
  • Page 2 SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND. In no event shall Bunn be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.
  • Page 3 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...

  • Page 4: Plumbing Requirements

    It can be purchased direct from Bunn-O-Matic (part number 00326-0000). Bunn-O-Matic does not recommend the use of a saddle valve to install the dispenser. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
  • Page 5 Refer to the decal inside the hopper access door for cleaning recommendations and procedures. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. ADJUSTMENTS The hot or cold beverage solenoid(s) is (are) preset to dispense approximately one ounce per second. This amount can be adjusted: Disconnect the dispenser from the power source.
  • Page 6 Hopper dispense rate with optional 32 tooth gear and auger wire is 6 to 9 grams per second. 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 7 TROUBLESHOOTING (cont.) PROBLEM Product will not dispense PROBABLE CAUSE 1. No water 2. No power or incorrect voltage to the dispenser 3. Dispense switch 4. Dispense solenoid valve (Hot or Cold) 5. Solenoid valve (Inlet) 6. Level control board and probe 7.
  • Page 8 TROUBLESHOOTING (cont.) PROBLEM Product will not dispense (cont.) Water is not hot Spitting or excessive steaming PROBABLE CAUSE 9. Water strainer 10. Lime build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi- tions.
  • Page 9 TROUBLESHOOTING (cont.) PROBLEM Dripping from dispense tip Water flows into tank continuously PROBABLE CAUSE 1. Lime build-up CAUTION - Tank and tank compo- 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.
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Product overflows container Weak product PROBABLE CAUSE 1. Dispense switch 2. Dispense solenoid valve (Hot or Cold) 1. Water temperature 2. Whipper motor 3. Frother 4. Dispense solenoid valve (Hot or Cold) 5. Auger drive 6. Auger spring 7.
  • Page 11 TROUBLESHOOTING (CONT.) PROBLEM Dispenser is making unusual noises Excess dust Display not lit PROBABLE CAUSE 1. Plumbing Lines 2. Water Supply 3. Tank Heater 1. Fan 2. Hopper Delay Board 3. Transformer (240V 2 Wire Models Only) 1. Lamp 2. Lamp Holder 3.

  • Page 12: Table Of Contents

    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.
  • Page 13 SERVICE AUGER DRIVE COMPONENTS (cont.) If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the wir- ing diagrams and check the dispenser wiring harness. With the wires removed from the motor to be tested.

  • Page 14: Auger Motor

    SERVICE (cont.) AUGER DRIVE COMPONENTS (cont.) 14. Install hopper assy (21) in the dispenser by slid- ing hopper assy in the guides on the hopper sup- port plate (20) until the slot in the bottom rear the hopper seats against the shoulder screw (19) in the hopper support plate.

  • Page 15: Ballast

    SERVICE (cont.) BALLAST FIG. 4 BALLAST Location The front door lamp ballast is located on the front center of the base behind the front panel. Test Procedure Disconnect the dispenser from the power source. Disconnect the two terminal plug of the door in- terconnect harness from the connector of the ballast.

  • Page 16: Control Thermostat

    SERVICE (cont.) CONTROL THERMOSTAT MECHANICAL ELECTRONIC (OPTIONAL) FIG. 6 CONTROL THERMOSTAT Location Mechanical Thermostat The mechanical thermostat is located on the upper right side of the rear panel inside the dispenser. Electronic Thermostat (Optional) The electronic thermostat is located on the right front side of the base just behind the front panel.
  • Page 17 SERVICE (cont.) CONTROL THERMOSTAT (cont.) Removal and Replacement. Mechanical Thermostat Disconnect the wires from the thermostat. Remove the thermostat capillary bulb by firmly pulling-up on the capillary at the tank lid. This will disengage the grommet from the tank lid. Remove the #8-32 screw securing the thermo- stat to the rear panel.

  • Page 18: Dispense Switch

    SERVICE (cont.) DISPENSE SWITCH FIG.8 DISPENSE SWITCH Location: The dispense switches are located on the lower outside of the dispenser door. NOTE: The center dispense switch is for HC-3 Models only. Test Procedure: Disconnect the dispenser from the power source. Open the dispenser door and remove the bottom door cover.

  • Page 19: Fan

    SERVICE (cont.) FIG. 10 FAN Location: The fan is located inside the front panel, mounted on a plate beneath the hopper mounting plate. Test Procedures: Disconnect the dispenser from the power source. Disconnect the black and white wires from the black leads on the fan.

  • Page 20: Frother

    SERVICE (cont.) FROTHER AND WHIPPER MOTOR FIG. 11 FROTHER AND WHIPPER MOTOR Location: The frothers are located behind the dispenser door, mounted on the front of the front panel inside the whipper chamber. The whipper motors are located on the back side of the front section of the front panel.
  • Page 21 SERVICE (cont.) FROTHER AND WHIPPER MOTOR (cont.) 4. Remove dispense tip (3) and twist the whipper chamber (4) clockwise and pull it off the whipper chamber receptacle (8). 5. Pull the frother (6) off the motor shaft. Notice the flat side on the shaft and the matching flat inside the frother.

  • Page 22: Hopper Delay Board

    SERVICE (cont.) HOPPER DELAY BOARD FIG. 13 HOPPER DELAY BOARD Location The hopper delay board is located on the left front side of the dispenser base just behind the front panel. Test Procedures: 1. Disconnect the dispenser from the power source. 2.

  • Page 23: Hot/Cold Switch

    SERVICE (cont.) HOT/COLD SWITCH (Optional) FIG. 14 HOT/COLD SWITCH Location: The hot/cold switch is located on the left side of the front panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the four pin plug from the hot/cold switch and the four pin connector on the main wiring harness.

  • Page 24: Lamp Holder

    SERVICE (cont.) LAMP HOLDER FIG. 16 LAMP HOLDERS Door Assy Upper Cover W/Reflec- Lamp Holders Lamp Lower Cover Starter W/Socket Location: The lamp holders are located on the front of the reflector behind the display panel. Test Procedure: Disconnect the dispenser from the power source. Disconnect the plugs on the door wiring harness from the connectors on the lamp holders.

  • Page 25: Lamp Starter And Socket

    SERVICE (cont.) LAMP STARTER and SOCKET (120V, 120/208V & 120/240V Models Only) Location: The lamp starter (6) is located inside the door assy (1) on the top of the door bottom cover (5). Test Procedures: 1. Disconnect the dispenser from the power source. 2.

  • Page 26: Level Control Board And Level Probe

    SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE FIG. 17 LEVEL CONTROL BOARD AND PROBE Location: The level control board is located on the upper right rear of the front panel just in front of the tank. The Level probe is located on the right center of the tank lid.

  • Page 27: Limit Thermostat

    SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE (cont.) If voltage is present as described, reinstall the probe, the level control board and level probe are operating properly. If voltage is not present as described, check the pink probe wire for continuity. Removal and Replacement: 1.

  • Page 28: Overflow Protection Switch

    SERVICE (cont.) OVERFLOW PROTECTION SWITCH FIG. 21 OVERFLOW PROTECTION SWITCH Location: The overflow protection switch is located in- side the copper overflow cup on the upper front of the tank. Test Procedures: 1. Disconnect the dispenser from the power source. 2.

  • Page 29: Rinse/Run Switch

    SERVICE (cont.) RUN/RINSE SWITCH FIG. 23 RUN/RINSE SWITCH Location: The run/rinse switch is located on the right side of the front panel. Test Procedures: Disconnect the dispenser from the power source. Check for continuity between center terminals and the upper terminals with the switch in the “RUN” lower position.

  • Page 30: Solenoid (Cold Drink - Optional)

    SERVICE (cont.) SOLENOID VALVE (COLD WATER - OPTIONAL) FIG. 25 COLD WATER SOLENOID VALVE Location: The cold water solenoid valve is located on the left side of the dispenser base just behind the hop- per delay board. Test Procedures: Disconnect the dispenser from the power source. Disconnect the white and white/yellow wires from the solenoid valve.

  • Page 31: Solenoid (Dispense)

    SERVICE (cont.) SOLENOID VALVE (COLD WATER - OPTIONAL) (cont.) WHI/YEL to Hot/Cold Switch WHI to Terminal Block FIG. 26 COLD WATER SOLENOID TERMINALS SOLENOID VALVES (DISPENSE) FIG. 27 DISPENSE SOLENOID VALVES Location: The dispense solenoids are located on the upper right side of the tank. Test Procedures: Disconnect the dispenser from the power source.

  • Page 32: Solenoid (Inlet)

    3. Drain enough water from the tank so the water level is below the dispense valve mounting hole. NOTE: Bunn-O-Matic has a syphon assembly, #12440.0000. available for this purpose. 4. Disconnect the water line from the solenoid valve. 5. Remove the #10-32 screw securing the solenoid valve to side of the tank.

  • Page 33: Tank Heater

    SERVICE (cont.) SOLENOID VALVE (INLET) (cont.) If continuity is not present as described, replace the solenoid valve. Check the solenoid valve for coil action. Connect the dispenser to the power source. Listen care- fully in the vicinity of the solenoid valve for a "clicking"...

  • Page 34: Tank Heater Switch

    SERVICE (cont.) TANK HEATER (cont.) 5. Check for continuity across the tank heater termi- nals. If continuity is present as described, reconnect the wires, the tank heater is operating properly. If continuity is not present as described, replace the tank heater. NOTE - If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.

  • Page 35: Transformer (240V Models Only)

    SERVICE (cont.) TANK HEATER SWITCH (cont.) Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the black wire and the blue/black wire on electro/mechanical thermostats or the tan wires on electronic thermostats. 3. With the switch in the “ON” lower position check for continuity between the center and the upper terminal.
  • Page 36 SERVICE (cont.) TRANSFORMER (240V TWO WIRE MODELSONLY)(cont.) Removal and Replacement: 1. Disconnect the wires from the transformer. 2. Remove the two #8-32 keps nuts securing the transformer to the dispenser base. 3. Remove and discard the transformer. 4. Install new transformer over the two weld studs on the dispenser base and secure with two #8-32 keps nuts.

  • Page 37: Wiring Diagrams

    120 VOLTS AC - 2 WIRE OR 120/208-240 VOLTS AC - 3 WIRE DISPENSE SWITCH SINGLE PHASE, 60 HZ (LEFT, MODELS HC-2 & HC-3) (ALSO HC-1 SWITCH) 27593.0004B 2/97 © 1996 BUNN-O-MATIC CORPORATION LIMIT RED-16 (3-WIRE MODELS) THERMOSTAT TANK HEATER BLK-16...
  • Page 38 (CENTER, MODEL HC-3 ONLY) 240 VOLTS A C 2 WIRE DISPENSE SWITCH SINGLE PHASE, (LEFT, MODELS HC-2 & HC-3) (ALSO HC-1 SWITCH) 50 HZ 27593.0004B 2/97 © 1996 BUNN-O-MATIC CORPORATION LIMIT THERMOSTAT TANK HEATER BLK-16 BLK-16 LIMIT THERMOSTAT TANK HEATER...

This manual is also suitable for:

Hc-2Hc-3

Table of Contents