Bunn ITB/ITCB, ICB/TWIN manual Early Brew Valve, Exploded View

Page 13

BREW VALVE (EARLY MODELS) AND BYPASS VALVE ON ALL ICB's

FIG. 13-1 EARLY 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. Disconnect 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, brew valve is defective. Replace valve and test again to verify repair.

If voltage is not present as described, refer to Wir- ing Diagrams and check the brewer wiring harness. Also check the control board and 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 hoses from the valve.

5.Remove the two #8-32 nuts securing the valve to the sprayhead panel.

6.Install new valve using the two #8-32 nuts.

7.Reconnect hoses to the valve and secure in place with clamps.

FIG. 13-2 EXPLODED VIEW

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

13

42461 0911809

 

Image 13
Contents ITB/ITCB ICB/TWIN BUNN-O-MATIC Commercial Product Warranty Introduction Control Boards TroubleshootingRefill Circuit Problem TroubleshootingProbable Cause RemedyHeating Circuit Problem Probable Cause Remedy Brewing Circuit Problem Probable Cause Remedy Problem Probable Cause Remedy Troubleshooting Brewing CircuitMessage Probable Cause Remedy DiagnosticsICB Component Access Component AccessControl Board Membrane Switch Continuity Membrane SwitchExploded View Early Brew ValveLate Model Brew Valve Brew Valve Late ModelsRefill Valves DisassemblyEarly Itcb Refill Valves Early ICBICB Twin Tank Heaters Tank HeatersLimit Thermostats Limit ThermostatTesting Temperature Probe Temperature ProbeCalibrate Temp Probe CalibrationTest Procedure Voltage Selector SwitchTest Procedure Removal and Replacement Power SwitchSchematic 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