Bunn AFPO-2 Manual Do Utilizador

21

FIG. 26 VACUUM SWITCHES

Location:

The  vacuum  switches  are  located  inside  autofill

box, mounted on the left side of the solenoid mount-
ing bracket just below the needle valves.

Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect flavor input lines.
3. Disconnect  white/red,  red/black  or  the  brown/

black wires on the vacuum switch.

4. Check for continuity across the switch leads.

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If continuity is not present as described, the vacuum
switch is operating properly.
If continuity is present as described, without a vacuum
generated by an empty product concentrate, replace
the vacuum switch.

Removal and Replacement:
1. Disconnect dispenser from the power source.
2. Removal of the two #8-32 keps nuts securing the

pump/motor  assembly  nearest  the  vacuum
switches is required to access the lower vacuum
switch.

3. Disconnect the input tubes from the vacuum switch

to be replaced.

4. Disconnect the wires on the vacuum switch to be

removed.

5. Remove the two #4-40 screws securing the vacuum

switch to the solenoid bracket. Remove and dis-
card switch.

6. Using two #4-40 screws secure the new vacuum

switch to the solenoid bracket.

7. Refer to Fig. 27 and reconnect the wires.
8. Connect the input tubes to the new vacuum switch.
9. Restore the pump/motor assembly to its normal

mounting position using the two #8-32 keps nuts.

WHI/RED from Refill ON/OFF Switch #3
WHI/RED to Circuit Board J4-2

RED/BLK from Refill ON/OFF Switch #1
RED/BLK to Circuit Board J4-5

BRN/BLK from Refill ON/OFF Switch #2
BRN/BLK to Circuit Board J4-4

FIG. 27 VACUUM SWITCH TERMINALS

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