Preventive Maintenance - Bunn Crescendo Installation & Operating Manual

Bean to cup espresso system

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Programming manual (34 pages)

Table Of Contents

Table of Contents

Bunn-O-Matic

Corporation recommends that preventive maintenance be performed at regular intervals.

Maintenance should be performed by a qualified service technician. For Technical Service, contact

Bunn-O-Matic Corporation at 1-800-286-6070.

NOTE: Replacement parts or service caused by failure to perform required maintenance is not covered by warranty.

Cycle (months)

Adjustable Variables Used to Create A Perfect Shot of Espresso Topped with Crema

The primary 2 variables that you mostly will adjust to achieve your ideal double shot espresso pour time will

be the coffee particle size and the dosage targets.

Variables

1. Coffee Particle Size: Adjustable

2. Espresso & Water Dosage: Adjustable (Target 12 grams espresso, 60 ML water for double shot)

3. Dry Tamp Percentage: Factory Default Setting 60 - Adjustable 60-100

4. Espresso Water Temperature: Factory Default Setting 215° F. Adjustable 190°-218°

Brew/Pour Time Target

• 17-23 Seconds Brew Time for Double Shot Espresso

Once the double shot has been calibrated, the grinder coarseness adjustment is complete. The only

adjustment you will need to perform is setting the espresso & water dosage for a single shot espresso.

Single Shot: 7 grams espresso, 30 ML water

NOTE: The brew/pour time will be what it is once the single shot dosage parameters are set.

Procedure Setting the Coffee Grinder Grind Setting:

Do Not change the grind particle size significantly, change coffee coarseness in 1 hashmark

increments, as it will change the grind rate, thus the amount of coffee ground and brew/pour time.

Step 1: First, ensure espresso beans are in the hopper. Open the door, and slide the espresso brew group

lock to the left to unlock the brew group. 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.

Step 2: Enter program mode and scroll to SET ESPRESSO SHOTS menu. Enter and scroll to TEST LG GRIND

TIME menu. Place cup under grinder chute to catch coffee grounds during grind adjustment. Press the

espresso button to start the grinder dispense timer, adjust the grinder adjustment screw while the grinder is

operating until grind particle size is desired or matches a desired grind sample.

Step 3: After setting the grind particle size, tare (zero) cup on weigh scale, then place cup under grinder

chute and press the espresso button to start the grinder dispense timer. Then, weigh the dispensed grounds.

The target is 12 grams for a double shot espresso. Adjust the grind time and keep repeating the grind throw

test until 12 grams is achieved.