Bunn My Cafe AP Technical Training Manual page 22

Step 6: Perform flow calibration.
□ Install the top cover and rear cover.
□ Reinstall water and connector fitting.
□ Reinstall power.
□ Reinstall pod bin and drip tray.
□ Access programming and go to "CALIBRATE FLOW" menu.
□ Depress YES button.
□ Place a graduated measuring cup (minimum of 10 ounces) under the coffee outlet.
□ Follow the instruction on the display.
□ After the dispense finishes, read the number of ounces collected and enter the amount into the brewer using the
+/- switches, then press DONE. The brewer will automatically recalculate the flow counter to achieve a 10 ounce
dispense.
Step 7: Perform a coffee brew test.
□ Follow "Operation" procedure in the installation and Operating Guide for coffee brewing.
□ Check volume against large and small brew ounce settings located in programming under "Brew OZ. A and Brew
OZ B" menu.
□ If ounces are off, then repeat the calibration procedure in step 6.
Optional Advanced Inspection PM
Removing the mineral deposit buildup from the suggested components can help increase the longevity performance
of the brewer.
Step 1: Inspect the following parts for mineral deposit buildup.
□ Stainless fill tube, temperature and fill sensor: Use a solution called Dezcal™ to help dissolve the scale from the
sensors. Follow the directions outlined by the product manufacture.
Note: Do not submerse the temperature sensor wires or use any abrasive material to help assist the removal of lime
scale from any metal surface.
□ Pump and hot water silicone pickup tubes: The pickup tubes are flexible enough to squeeze and break-up
mineral deposits that may be adhered to the material. Dezcal™ is still an option to use if needed.
Step 2: Replace the brew outlet check valve located in the sprayhead assembly.
Check Valve Installation
□ Connect brewer to power source. Use the "TEST OUTPUTS/TEST INDEX MOTOR" to move it to "DUMP
POSITION").
□ Unplug brewer.
□ Remove top cover. Remove thumbscrew and catch sprayhead. Verify sprayhead seal is also removed.
□ Remove both check valves with hook pick tool. (Fig. 2-1)
□ If check valve pulls apart, remove remaining piece with a hook pick tool.
□ Install new check valves with o-ring end in first.
Note: Never re-use check valve after it has been pulled out and are different from each other.
□ Install seal on sprayhead (FIG 2-2). When reassembling sprayhead, be sure to have seal installed with ridge
facing up (A). Install sprayhead and thumbscrew if equipped.
□ Install covers.
□ Power up brewer and Press "OPEN/CLOSE" button to reset pod holder to home position.
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My Caf é AP Training Manual
Sprayhead
Seal
2-2