La Spaziale S1 Vivaldi II Owner's Manual - page 26
S1 Vivaldi II Owner’s Manual
Page 25
Then rinse the remaining detergent from the basket and replace the portafilter with
the backflush disk still installed.
Backflush for 5 more cycles to rinse the remaining residue from the group and 3-
way valve.
Remove the backflush disk, make shot of espresso and throw it out.
Important Tip: To maximize the effectiveness of the cleaning process and minimize
how often a detergent cleaning is required, after every series of shots is pulled, run a
shot with the PF remove. Scrub the screens and around the gasket with a Pallo brush
while the hot water is exiting the group. This will flush most of the grounds and
sediment into the drip tray.
NOTE: The following are advanced maintenance and adjustment
procedures. Do not perform them without the proper tools and
confidence that you can do them properly. When in doubt always
contact your VII dealer first.
8.3 Group Pressure Test and Adjustment
This adjustment and the one covered in the next section require that use of a Portafilter with
the rubber disk or blind filter basket. (The same one used for back flushing.) For clarity the
portafilter is not shown in the photo but it MUST be used.
Removal of the chrome panel behind the portafilter is required. This is the panel through
which protrudes the boiler/group pressure gauge. Use a large Phillips screwdriver to remove
the two screws adjacent to the numbers (5) on the diagram on page 2. Then remove the
panel. Attach the portafilter with rubber disk or blind basket. The adjustment screws are
designated by the letters “A” and “B” in the diagram below. First, loosen the lock nut “A”
(14mm wrench). Press the
Single Cup
(24) or
Double Cup
(25) button and wait for the group
pressure gauge “D” to stabilize. Most users prefer group pressure in the range 8.2-9.0 bar.
Turning the adjuster nut “B” (10mm wrench) counter-clockwise lowers the pressure, turning it
clockwise increases the pressure. When it is set to your preferred pressure, tighten the lock
nut and recheck. Then reattach the front panel. Should your water supply pressure change
significantly, readjustment will be required as the rotary pump supplies an adjustable boost to
the supply pressure. However, if you add an in-line pressure regulator to the water supply line
this should not be required. If your water supply pressure is higher than 30psi, a water
pressure regulator can also reduce or eliminate expansion valve drips.