Bunn ICB/TWIN, ITB/ITCB manual Brew Valve Late Models, Late Model Brew Valve

Page 14

BREW VALVE (LATE MODELS)

FIG. 14-1 LATE MODEL BREW VALVE

Location:

The brew valve is located inside the top cover behind the front face plate.

Test Procedures:

1.Refer to the Programing Section for Service Tools/ Test Outputs/Brew Valve.

2.Be sure brew funnel & server are in place before activating valve.

3.Check the valve for coil action. Turn on the valve with the test mode. Listen carefully in the vicinity of the brew valve for a click as the coil pulls the plunger in.

If no sound is heard as described, proceed to #4.

If the sound is heard as described, there may be a blockage in the valve , hose, tank, or sprayhead. Dis- connect the brewer from the power source. Remove the valve and inspect for blockage, and de-lime all related areas.

4.Connect the voltmeter leads to the coil terminals. Turn on the valve with the test mode.

The indication will be 2-3VAC off, 120VAC on. Set the meter to DC volts. The indication should be 150- 160VDC when off, 0V when on. If the polarity of meter leads are reversed, reading will indicate -150-160VDC. (Double these readings for 240 volt coils)

If voltage is present as described, but no coil action is observed, valve is defective. Replace valve and test again to verify repair.

If voltage is not present as described, refer to Wiring

Diagrams and check the brewer wiring harness. Also check the control board and membrane switch for proper operation.

Removal and Replacement:

1.Disconnect the brewer from the power source.

2.Disconnect wires from the valve.

3.Drain enough water from the tank so the water level is below the outlet.

4.Remove sprayhead and hose from the valve.

5.Remove the nut securing the valve to the sprayhead panel.

6.Install new valve using the nut from step 5.

7.Reinstall sprayhead and hose to the valve and secure in place with clamps.

FIG. 14-2 LATE MODEL BREW VALVE

Due to the internally rectified coil, do not attempt to test this type of coil with an ohmmeter. The reading will be open or very high resistance, depending on the polarity of your meter leads.

14

42461 0911809

 

Page 13 Page 15
Image 14
Page 13 Page 15
Contents ITB/ITCB ICB/TWIN BUNN-O-MATIC Commercial Product Warranty Introduction Troubleshooting Control BoardsProbable Cause TroubleshootingRefill Circuit Problem RemedyHeating Circuit Problem Probable Cause Remedy Brewing Circuit Problem Probable Cause Remedy Troubleshooting Brewing Circuit Problem Probable Cause RemedyDiagnostics Message Probable Cause RemedyComponent Access ICB Component AccessControl Board Membrane Switch Membrane Switch ContinuityEarly Brew Valve Exploded ViewBrew Valve Late Models Late Model Brew ValveDisassembly Refill ValvesRefill Valves Early ICB Early ItcbTank Heaters ICB Twin Tank HeatersLimit Thermostat Limit ThermostatsTemperature Probe Testing Temperature ProbeCalibration Calibrate Temp ProbeVoltage Selector Switch Test ProcedurePower Switch Test Procedure Removal and ReplacementSchematic Wiring Diagram iTCBA, iTCBB Schematic Wiring Diagram With Factory Sweetener Schematic Wiring Diagram ICB-DV Schematic Wiring Diagram ICB Twin Schematic Wiring Diagram iCBA, iCBB Schematic Wiring Diagram ICB Twin 230V Chassis Ground Term Schematic Wiring Diagram ITB
Top Page Image Contents