La Marzocco Strada, Руководство пользователя

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The expansion valve is adjusted by increasing or decreasing pressure on the spring by turning
the brass barrel.
It should begin to drip at 10-11 bar and release fully above 12 bar.
8. SAFETY RELIEF VALVE
The safety relief valve relieves boiler pressure at 1.8 bar thus preventing the steam boiler from
over-pressurizing. It is factory adjusted and sealed. It cannot be adjusted.
9. MOTOR PUMP
The motor pump increases existing water pressure to 135psi or 9 bar.
This is the optimum pressure for brewing espresso.
An adjustment screw is located on the side of the pump inside the cap screw.
Some pumps have accessible screws and some pumps have a cap screw that must be removed
to make an adjustment.
Turning the screw clockwise will increase the pump pressure and counter clockwise will
decrease pressure. Make pump pressure adjustments while simultaneously brewing espresso.
Check that your water supply pressure is stable before making an adjustment.
A fluctuating water supply pressure will affect the final result. If your water pressure does
fluctuate it is required to install a water pressure regulator or floating bypass rotating pump.
10. MAIN POWER SWITCH
Power enters the machine through the power cord, which then enters a large terminal block,
and then to the main power switch.
The main power switch has three positions:
“0” This is the “off” position
“1” This is the “fill” position. It activates all systems except the heating elements.
“2” This is the “run” position. It provides power to all systems. (JUST ON LINEA AND FB/70)
11. THERMOSTAT (ON THE LINEA AND FB/70)
The thermostat controls the temperature of the front boiler.
The thermostat resides in a well that isolates it from the water but allows the temperature of
the water to transfer.
The thermostat contains a bellows filled with a thermal fluid that expands and contracts
depending on the surrounding temperature.
As the water heats in the coffee boiler it causes the fluid in the bellows to expand, which
drives a piston up.
When the piston rises, it eventually activates a switch, which turns off the heating elements.
As the water cools the piston will fall and allow the switch to turn on again and repeat the
heating cycle.