Description of terms
The following terms are used throughout this manual and other Mavam publications. While not
a full list these are the most used and common terms.
Blind Basket: A cup that is installed in the portafilter without holes. This is used for cleaning the
Group Head. Also called a “Backflush Basket”.
Drain Tray: Removable metal screen below the Group Heads. Water drains through this screen
to the User Interface drain.
Flow (Flowmeter): The volume of water used in brewing is measured using a “flowmeter”.
Water flowing through the flowmeter turns a paddle wheel. Each revolution of this wheel is
counted at one “Pulse”. The volume of water per Pulse will vary depending on the machine,
use, and water pressure.
Flow Rate: The volume of water (Pulses) over time.
Group Display: OLED display mounted in the User Interface base. This displays group
temperature, mode of operation, and brew times for pre-infusion and brew cycles, and menu
functions.
Group Head: Metal receptacle attached to the underside of the top of the Group Tower that
holds the portafilter.
Group Tower: Stand connected to the User Interface counter panel that holds the brew head.
The tower routes the hot water for brewing, power for the group heater, and brew head
temperature sensors.
Hot Water Jet: Metal tube shaped like an upside down “U”. Hot water is piped from the steam
boiler and exits at the Hot Water Diffuser tip.
Operation Controls: Illuminated actuators button(s) that control a function of the machine.
Each actuator may have more than one function depending on the mode selected.
Portafilter: Mates with the Group Head and holds the basket containing ground coffee. A
handle is attached to the portafilter so the barista may insert and remove the portafilter. There
are many styles and configurations of portafilters.
Pulse: One revolution of the flow meter paddle wheel. Used to measure volume.
Pump: AC motor with pump and pressure regulator attached. These are external to the unit.
Rinser Jet: Fitting mounted in the Drip Tray connected to the rinser activation plate. When the
rinser activation plate is pressed down cold water is sprayed from the fitting.
Steam Boiler Unit: Metal enclosure containing the steam boiler, brew tanks, water distribution
manifold, pump interface, BCU (Boiler Control Unit electronics), 24V power supply.
Steam Wands: Metal tubes shaped like an upside down “U”. Steam is piped from the steam
boiler and exits at the Steam Wand tip.
User Interface: This is the entire unit that sits on the countertop. It contains the Group tower,
group head, steam wands, hot water jet, rinser jet, drain tray, operation controls and group
display.
2023 Mavam User Manual V4.53 UC/F Page 7 of 28
