Brew Water Calibration; Adjusting Brew Parameters - Bunn trifecta Technical Training Manual

After the initial setup, it is recommended to perform a brew water calibration before making any recipe adjustments
and starting a brew process. The purpose is to ensure that the brew volume or portion dispense is accurate upon
a finished brew. The recipe brew volume is adjustable and is calculated from the flow counts produced from the
flow meter. The default calibration value is 10 ounces during the calibration routine. Once the actual flow amount is
captured, measured and entered into programming, the brewer will automatically adjust the flow count number (flow
meter) to achieve a 10 ounce dispense.
How to Calibrate Water Flow
Step 1: Install the water supply and power to the brewer.
Step 2: Verify that the brew chamber is installed and locked into position.
Step 3: Gain access into programming and scroll to "SERVICE TOOLS" menu.
Step 4: Under "SERVICE TOOLS", scroll through until the display screen reads "CALIBRATE FLOW" and select this
option.
Step 5: Place a graduated measuring cup that can hold at least 10 ounces of water under the coffee outlet.
Step 6: Follow the instruction on the display.
Step 7: Allow the calibrate flow routine to dispense all of the water from the brew chamber into the graduated
measuring cup.
Step 8: Record the ounces of water that dispensed into the graduated measuring cup.
Step 9: Enter the number of ounces recorded into the "ENTER OZ. 10.0" menu using plus and minus switches, then
press done when finished.
Adjusting Brewing Parameters
To set up specific parameters for a particular recipe, verify that the recipe name is currently displayed. Then press
"SELECT" and the display screen will take the user to the first adjustment option. If the specific brewing parameters
need to be adjusted after selecting the coffee name, then you will need to scroll through all of the recipe parameter
menus and adjust them accordingly to your recipe.
remaining water is introduced and the brewing process continues. Range: 1-25 sec.
This screen allows the user to adjust the desired brew volume. Range: 2 -16 oz.
This screen allows the user to adjust the seconds for the pre-wet of ambient water on top
of the coffee grounds. Range: 0 - 1.0 sec.
This screen allows the user to adjust the percentage of overall brew volume during the
pre- infusion stage. Range: OFF/ 1-100%.
This screen allows the user to adjust the timed delay after pre-infusion, when the
This screen allows the user to adjust the seconds of extraction time that starts after the
total brew water is added to the brew chamber. Range: 20-250 sec.
This screen allows the user to adjust how long the turbulence air ON time is.
Range: OFF/ 1-25 sec.
This screen allows the user to adjust how long the turbulence air off time is.
Range: OFF/ 1-20 sec.
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