Bunn ITB/ITCB Manual De Usuario
15
REFILL VALVES
Location:
The refi ll valve is located inside the front of the
brewer.
Test Procedures:
1. Enter programming level 2, scroll to "Service Tools"
then scroll to "Refi ll Valve".
2. Briefl y activate the refi ll valve in the test mode.
With a voltmeter, check the voltage across the coil
wires.
3. The indication must be 120 volts ac for two wire 120
volt models and three wire 120/208 -240 volt models
or 230 volts ac for two wire 230 volt models.
If voltage is present, proceed to # 4.
If voltage is not present, refer to Wiring Dia-
grams and check main wiring harness. If har-
ness checks ok, replace control board.
4. Check the refi ll valve for coil action. Briefl y activate
the refi ll valve in the test mode and listen carefully near
the refi ll valve for a "clicking" sound as the magnetic
coil pulls the plunger in.
If the sound is heard as described and water
will not pass through the refi ll valve, there
may be a blockage in the water line before
the refi ll valve or, the solenoid valve may
require inspection for wear, and removal of
waterborne particles.
If the sound is not heard as described, pro-
ceed to # 5.
5. Disconnect the brewer from the power source. 6.
Check for resistance across the coil terminals (200
1. Enter programming level 2, scroll to "Service Tools"
then scroll to "Refi ll Valve".
2. Briefl y activate the refi ll valve in the test mode.
With a voltmeter, check the voltage across the coil
wires.
3. The indication must be 120 volts ac for two wire 120
volt models and three wire 120/208 -240 volt models
or 230 volts ac for two wire 230 volt models.
If voltage is present, proceed to # 4.
If voltage is not present, refer to Wiring Dia-
grams and check main wiring harness. If har-
ness checks ok, replace control board.
4. Check the refi ll valve for coil action. Briefl y activate
the refi ll valve in the test mode and listen carefully near
the refi ll valve for a "clicking" sound as the magnetic
coil pulls the plunger in.
If the sound is heard as described and water
will not pass through the refi ll valve, there
may be a blockage in the water line before
the refi ll valve or, the solenoid valve may
require inspection for wear, and removal of
waterborne particles.
If the sound is not heard as described, pro-
ceed to # 5.
5. Disconnect the brewer from the power source. 6.
Check for resistance across the coil terminals (200
-2k depending on which coil is being checked).
If resistance is not present as described,
replace the refi ll valve.
If resistance is present as described, check
for debris in the valve.
replace the refi ll valve.
If resistance is present as described, check
for debris in the valve.
Removal and Replacement:
1. Remove both wires from the refi ll valve.
2. Verify that the white shutoff clamp between valve
and tank is squeezed shut.
3. Disconnect both water lines at the valve.
4. Remove the two screws securing the valve to the
component mounting bracket.
5. Using the two screws, install the new valve to the
component mounting bracket.
6. Securely fasten the water lines to the valve.
7. Refer to wiring diagrams when reconnecting the
wires.
8. Install access panels and covers and refer to Initial
Set-up for refi ll and operation.
1. Remove both wires from the refi ll valve.
2. Verify that the white shutoff clamp between valve
and tank is squeezed shut.
3. Disconnect both water lines at the valve.
4. Remove the two screws securing the valve to the
component mounting bracket.
5. Using the two screws, install the new valve to the
component mounting bracket.
6. Securely fasten the water lines to the valve.
7. Refer to wiring diagrams when reconnecting the
wires.
8. Install access panels and covers and refer to Initial
Set-up for refi ll and operation.
Disassembly:
Bunn does not offer repair/rebuild kits for the refi ll
valves, but some disassembly may be accomplished
on the early style valves in the event they may need to
be cleaned out. Disassembly is not recommended on
the newer style, as damage to the valve could occur.
Refer to next page for exploded views.
Bunn does not offer repair/rebuild kits for the refi ll
valves, but some disassembly may be accomplished
on the early style valves in the event they may need to
be cleaned out. Disassembly is not recommended on
the newer style, as damage to the valve could occur.
Refer to next page for exploded views.
FIG. 15-1 REFILL VALVES
42461 0911809