Bunn Crescendo Installation & Operating Manual page 30

Procedure Setting Grinder Adjustment Screw Back to
Factory Setting
The procedure for setting the adjustment screw back to a factory setting
after dismantling and cleaning the burrs.
1. Bean hopper removed or chute closed. Place switch in Program
position. Go to display screen and scroll to "SET ESPRESSO SHOTS"
menu. Enter and scroll to "TEST LG GRIND TIME" menu. Loosen
locknut and use large flat blade screwdriver to rotate adjustment
screw. Press the espresso button to start the grinder motor, while
the motor is running, slowly rotate the adjustment screw inside the
nut clockwise. When a "chirping" sound of the burrs touching is
heard, rotate counter clockwise just until the chirping stops.
2. Reference the adjustment screw slot and mark the burr rotor cap with
0. Then rotate the adjustment screw 11 hashmarks counter clockwise
from 0 to set back to a factory setting. Mark the burr rotor cap to
indicate 11 hashmark setting. Holding the screw with the screwdriver,
tighten the hex nut. Make sure after tightening nut, the setting is still
lined up at the 11 hashmarks from zero.
Grinder Throw Weight Adjustment
1. Open the door, and slide the espresso brew group lock to the left to unlock the brew group.
2. Tip the top of the brew group head towards the front of the machine to disengage from the espresso drive, then
remove brew group from the drive.
3. Place the NORMAL/PROGRAM/RINSE switch in the PROGRAM position.
4. Press the Large Cup button to the SET ESPRESSO SHOTS menu, then press the button under YES.
5. Press the Large Cup button to TEST SM GRINDTM.
6. Place a small container on a scale, and tare container.
7. Hold the container under the grinder chute, and press any beverage dispense button.
8. Grinder will run for the time set for a small (single shot) espresso, then stop.
9. Repeat several times, and average the weight.
10. To change the weight, press the Small Cup button to SM ESP GRIND TIME.
11. Us the buttons below the (-) and (+) button to increase or decrease the grind time.
12. Press the Large Cup button to TEST SM GRIND to test new grind time.
13. Press the Large Cup button to TEST LG GRIND to test the large (double shot) grind weight.
14. Press the Small Cup button to LG ESP GRIND TIME to adjust the grind time for a large (double shot) espresso,
if required.
15. After the grind adjustments have been tested and adjusted, place the NORMAL/PROGRAM/RINSE Switch in the
"RUN" position, and exit program mode.
16. Reinstall the espresso group head back onto the espresso drive.
ADJUSTMENTS
30
Loosen Locking Nut to allow
Adjustment Screw to move