La Marzocco linea pb coffee machine Quick Start Guide
The La Marzocco linea pb is a coffee machine that features an automatic brew ratio (ABR) system. This allows you to program the machine to brew a shot of coffee with your desired ratio of dry coffee weight to beverage weight. The machine also has a built-in scale that allows you to monitor the weight of your beverage as it brews and the machine will terminate the shot once your target weight is reached.
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Key Features
- Automatic Brew Ratio (ABR) system
- Built-in scale
- Programmable brew ratios
- Programmable brew volumes
- Continuous brewing mode
- Mass brewing mode
Frequently Answers and Questions
How do I enter programming mode?
Hold G1B3 for five seconds until "Group Dose Setting" appears.
How do I set the "Stop #.#g early" parameter?
Enter programming and navigate to "Scale Configuration". Then, you can set the "Stop #.#g early" parameter, which is an offset that closes the brew valve before the target beverage mass is reached. This is to allow for the residual liquid in the portafilter to complete the beverage, without going over. You can set this value for each button, both short and long doses. The short doses are used in BREWRATIO mode as well.
A good starting point to decide this value is to brew a shot in mass mode. Set your target beverage weight, for example, 40g. Pull a shot using this program and note your final beverage weight, for example, 43.5g. Then, subtract your beverage weight from your target weight to get your stop-early offset: 43.5g - 40g = 3.5g. You may need to adjust this depending on your flow rate.
How do I calibrate the scales?
Enter technician level programming by holding G1B3 for 10 seconds until prompted for a password. The password is B1, B2, B3, B1, B2, B3. Then, navigate to "Scale Configuration Settings" > "Calibrate G# Scale".
Follow the on-screen instructions. You will need to place a 100g weight on the scale, press enter, and the display will flash values for three variables: Ratio, Trials, and Quality. Record these values and compare them to the chart provided in the manual. If any of these values are outside of the specified range, ensure there is nothing touching or interfering with either the load cell or scale plate. Recalibrate. If any of the values are still out of the specified range, contact Aftersales Solutions.
How do I brew in BREWRATIO mode?
First, you need to enter the portafilter weight by holding G1B2 for 2 seconds until PF ███ is displayed. Then, wait until PF 0.0 is displayed, place the portafilter on the scale tray, making sure the lip of the portafilter sits in the crescent shaped cutout. Once the weight of the portafilter is displayed, as a negative value (ex: -569), place the loaded portafilter on the scale tray, making sure the lip of the portafilter sits in the crescent shaped cutout. The keypad will flash once the dose is recorded.
Then, you need to enter the desired target brew ratio in programming. Engage the portafilter in the group and start the shot using the programmed button. The target weight will be calculated based on the programmed brew ratio and displayed until the tare time. The shot will self-terminate, using the stop-early parameter, so the programmed beverage mass is reached.
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