Bunn H10X Operating & Service Manual
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Bunn H10X Operating & Service Manual

Bunn coffee maker h10x operating & service manual
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OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
To ensure you have the latest revision of the manual or to obtain the illustrated parts catalog, please visit the Bunn-O-Matic
website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and manual updates.
Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed
via U.S. Postal Service.
10889.0000E 02/08 ©1995 Bunn-O-Matic Corporation
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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www.bunn.com

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  • Page 1 PHONE: (217) 529-6601 FAX: (217) 529-6644 To ensure you have the latest revision of the manual or to obtain the illustrated parts catalog, please visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and manual updates.
  • Page 2 SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, 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 FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE, OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831.0000F 3/98 ©1998 BUNN-O-MATIC CORPORATION 00831.0000 37881.0000 10889 021408...
  • Page 4 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 NOTE - The dispenser must be refilled using the INITIAL SET-UP steps before reconnecting to the power source. CLEANING 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. 10889 021408...
  • Page 6 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 person- nel.
  • Page 7 TROUBLESHOOTING (cont.) PROBLEM Automatic refill will not operate after drawing hot water. Water flows into the tank continu- ously. (Dispenser disconnected from power source). Water flows into the tank con- tinuously (Dispenser connected to power source). Water is cold. CAUTION - Do not eliminate or bypass limit thermostat. Use only B.O.M. replacement part #23717.0003. PROBABLE CAUSE 1.
  • Page 8 TROUBLESHOOTING (cont.) PROBLEM Water is cold (cont.) Water boils continuously. CAUTION - Tanks and tank components should be delimed regularly depending on local water conditions. Exces- sive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks. Dispenser is making unusual nois- Ready indicator will not light.
  • Page 9 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. Component Access WARNING - Disconnect the dispenser from the power source before the removal of any panel or the replace- ment of any component.
  • Page 10 SERVICE (cont.) Electronic Control Assembly Troubleshooting: Check these items first • Is circuit board popped out of bracket? • Is circuit board wet due to misaligned overflow tube? • Is water in overflow cup activating float switch? • Is overflow cup not making good contact with tank? •...
  • Page 11 SERVICE (cont.) Electronic Controls (cont.) Liquid Level Control Test Procedure 1. Disconnect the dispenser from the power source. 2. Check the voltage across terminals 3 & 4 of the electronic control assembly with a voltmeter. Connect the dispenser to the power source. The indication must be 200 to 240 volts ac for 200 to 240 volt models.
  • Page 12 If voltage was present as described, the temperature control of the system is operating properly. If voltage was not present as described, contact Bunn-O-Matic to order an electronic control assembly temperature sensor, and triac assembly for evaluation and proceed to #9.
  • Page 13 11. Disconnect the dispenser from the power source. If voltage was present as described, return the new triac assembly to Bunn-O-Matic for credit. The temperature control of the system is operating properly. If voltage was not present as described, reinstall your existing...
  • Page 14 NOTE - Each triac installation requires the use of an approved silicone heat sink compound. Bunn-O-Matic recommends the use of Dow Corning 340 compound or equivalent. It can be purchased direct from Bunn- O-Matic (P.N. M2522.1000) 1. Remove the existing triac assembly held in place with a 10-32 hex keps nut.
  • Page 15 SERVICE (cont.) Limit Thermostat Limit Thermostat Location: The limit thermostats are located on the tank lid. To test the limit thermostats, access will also be needed to the terminal block located on the side of the dispenser. FIG. 5 LIMIT THERMOSTAT Test Procedure: 1.
  • Page 16 SERVICE (cont.) Overflow Protection Switch FIG. 7 OVERFLOW PROTECTION SWITCH Location: The overflow protection switch is located within the side of the dispenser inside the copper overflow cup. For testing or removal of the overflow protection switch, access may also be needed by removing the two screws attaching the electronic control assembly to its mounting bracket.
  • Page 17 SERVICE (cont.) Solenoid Valve Location: The solenoid valve is located within the side of the dispenser on the right side near the bottom. To test the solenoid valve, access will also be needed to the electronic control assembly. D IS V IN FIG.
  • Page 18 SERVICE (cont.) Solenoid Valve (cont.) 5. Lift out the solenoid valve. 6. Remove the two 10-32 slotted-head screws holding the solenoid valve to its mounting bracket. 7. Securely install the new solenoid valve to its mount- ing bracket. The direction of flow arrow must be pointing towards the tank lid.
  • Page 19 SERVICE (cont.) Tank Heater Location: The tank heater is located in the tank lid. FIG. 11 TANK HEATER Test Procedure: 1. Disconnect the dispenser from the power source. 2. Check the voltage across the terminals of the tank heater with a voltmeter. Connect the dispenser to the power source.

  • Page 20: Wiring Diagram

    LIMIT THERMOSTAT OVERFLOW PROTECTION SWITCH HEATER REFILL POWER READY 200-240 VOLTS AC 2 WIRE + GND SINGLE PHASE 10888.0000C 01/07 © 1989 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM H10XA TANK HEATER TANK HEATER ELECTRONIC CONTROL ASSY P101 INTERLOCK (DRY PLUG-IN) ASSY...

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