Dispense And Bypass Valves - Bunn TITAN DUAL Service & Repair Manual

COMPONENT ACCESS (cont)
BYPASS VALVES
Dispense Valve
Bypass Valve
FIG 3 BYPASS/DISPENSE VALVES
Location:
The bypass valve(s) (Fig 3) are located inside the
hood under the top cover.
Test Procedures:
1. Refer to the Trouble Shooting Section for Service
Tools/Test Outputs/Bypass 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 bypass 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, or tank. 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. NOTE: Due
to the internally rectified coil, the indication will
be 120VAC all the time. Set the meter to DC volts.
The indication should be 170VDC when activated.
If the polarity of meter leads are reversed, reading
will indicate -170VDC. (Double these readings for
240 volt coils)
RELEASED FOR PRODUCTION
Contactor
DIR Num: 41747.0000
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 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 tube(s) from the valve.
5. Remove the two #8-32 nuts mounting valve to the
bracket.
6. Install new valve using nut(s) removed in step 5.
7. Reconnect tube(s) to the valve and secure in place
with clamp(s).
DISPENSE VALVES
Location:
The dispense valve(s) (Fig 3) are located inside
the hood under the top cover.
Test Procedures:
1. Refer to the Trouble Shooting Section for Service
Tools/Test Outputs/Dispense 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 dispense 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.
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12, December 2018
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