Bunn GMB-PS Operating & Service Manual
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Bunn GMB-PS Operating & Service Manual

Bunn GMB-PS Operating & Service Manual

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BUNN
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
27479.0000D 12/00 ©1996 Bunn-O-Matic Corporation
All manuals and user guides at all-guides.com
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PN
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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  • Page 1 IF : O IL IN J TI O R IS A TI IL U : 65 OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 27479.0000D 12/00 ©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 BEFORE USING THIS PRODUCT FAILURE TO COMPLY RISKS INJURY READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT PN: 00658.0000F 6/98 © 1985 BUNN-O-MATIC CORPORATION THIS APPLIANCE IS HEATED WHENEVER #00658.0000 CONNECTED TO A POWER SOURCE 00831.0000F 3/98 ©1988 BUNN-O-MATIC CORPORATION #00831.0000...
  • Page 4 " water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
  • Page 5 All manuals and user guides at all-guides.com PLUMBING REQUIREMENTS (cont.) 1. Attach the flare fitting from the short piece of tubing on the strainer (supplied) to the water inlet fitting at the left rear of the brewer. 2. Flush the water line and securely attach it to the flare fitting on the strainer.
  • Page 6 NOTE – The "ON/OFF" switch must be in the "ON" upper position to initiate and complete a brew cycle. COFFEE BREWING ® 1. Insert a BUNN filter into the funnel. 2. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking.
  • Page 7 All manuals and user guides at all-guides.com 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. •...
  • Page 8 All manuals and user guides at all-guides.com TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) 3. ON/OFF Switch Refer to Service - ON/OFF Switch for testing. See page 16 4. Start Switch Refer to Service - Start Switch for testing procedures.
  • Page 9 All manuals and user guides at all-guides.com TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in dis- 1. Flow control (.175 GPM) (A) Direction of flow arrow must penser be pointing towards the brewer. (B) Remove the flow control and check for obstructions.
  • Page 10 All manuals and user guides at all-guides.com TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Consistently low beverage level in 3. Strainer (A) Direction of flow arrow must the dispenser (cont.) be pointing towards brewer. (B) Remove the strainer and check for obstructions. Clear or replace. Spitting or excessive steaming 1.
  • Page 11 A seven hole stainless steel spray- head must be used for proper ex- traction. ® 4. Funnel Loading The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by gentle shak- ing. 5. Water Temperature Place an empty funnel on an empty dispenser beneath the sprayhead.
  • Page 12 All manuals and user guides at all-guides.com TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dry coffee grounds remain in the 1. Funnel Loading The BUNN ® paper filter must be funnel centered in the funnel and the bed of grounds leveled by gently shak- ing.

  • Page 13: Table Of Contents

    All manuals and user guides at all-guides.com SERVICE This section provides procedures for testing and replacing various major components used in this brewer 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 14: Control Thermostat

    All manuals and user guides at all-guides.com to the power source. The indication must be: SERVICE (cont.) a) 120 volts ac for two wire 120 volt models, three CONTROL THERMOSTAT wire 120/208 and 120/240 volt models. b) 200 to 240 volts ac for two wire 200 volt or 240 volt models.

  • Page 15: Limit Thermostat

    All manuals and user guides at all-guides.com SERVICE (cont.) LIMIT THERMOSTAT Removal and Replacement: 1. Remove all wires from limit thermostat terminals. 2. Carefully slide the limit thermostat out from under the retaining clip and remove limit thermostat. 3. Carefully slide the new limit thermostat into the retaining clip.

  • Page 16: On/Off Switch

    All manuals and user guides at all-guides.com SERVICE (cont.) If continuity is present as described, reconnect the ON/OFF SWITCH black wire to the center terminal and the white/red to the lower terminal. If continuity is not present as described, replace the switch.

  • Page 17: Solenoid (Inlet)

    All manuals and user guides at all-guides.com SERVICE (cont.) white/red and white/green wire from the timer. SOLENOID VALVE If continuity is not present as described, replace the solenoid valve. 6. Check the solenoid valve for coil action. Connect the brewer to the power source. With "ON/OFF" switch in the "ON"...

  • Page 18: Start Switch (Brew)

    All manuals and user guides at all-guides.com SERVICE (cont.) Removal and Replacement: START SWITCH 1. Remove the white/orange wire and white/yellow wire from the start switch. 2. Compress the clips inside the hood and gently push the switch through the opening. 3.

  • Page 19: Tank Heater

    All manuals and user guides at all-guides.com SERVICE (cont.) Removal and Replacement TANK HEATER 1. Shut off water supply to the brewer. 2. Disconnect the water supply tubes on the tank lid for the tank and the faucet coil assembly. 3.

  • Page 20: Timer (Early Models)

    All manuals and user guides at all-guides.com SERVICE (cont.) TIMER (early models) 7. Disconnect white/red and white/green wires to the solenoid. EARLY MODELS 8. With a voltmeter, check the voltage across the white/red and white/green wires when the "ON/ OFF" switch is in the "ON" upper position and the "START"...

  • Page 21: Digital Timer (Late Models)

    All manuals and user guides at all-guides.com SERVICE (cont.) DIGITAL TIMER (Late Models) If voltage is as described, proceed to #7. If voltage is not as described, disconnect the brewer LATE MODELS from the power source and replace the timer. 7.
  • Page 22 All manuals and user guides at all-guides.com SERVICE (cont.) NOTE: When brewing coffee, volume will decrease due DIGITAL TIMER (Late Models)(cont.) to absorption by the coffee grounds. To increase a brew volume, place the ON/OFF switch in the "ON" position, press and hold the START 3.
  • Page 23 All manuals and user guides at all-guides.com Page 23 27479 091596...
  • Page 24 All manuals and user guides at all-guides.com Page 24 27479 091596...

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