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TECHNICIANS manual
2.6.7 LEVER groups
Lever groups us the boiler pressure and water. This
system does not require heat exchangers.
When the lever (1) is lowered, the spring (2) inside
the group is compressed: the piston (3) raises, allowing
water to enter the pre-infusion jacket.
When the lever is released, the piston compresses the
water to 8-10 bar, allowing dispensing of espresso coee.
The non-return ball valve (4) keeps water from owing
back into the boiler (5).
1
45
2
3
PHASE 1
Lowering the
lever
PHASE 2
Pre-infusion for
3-5 seconds
PHASE 3
Release of lever
and dispensing of
the coee
2.6.8 TOGGLE groups
For the toggle group is used a system similar to the
one shown for the Dispensing Group see par. "2.6.9
DISPENSING group" on page 13.
In this case the dispensing is controlled by a spring
system. The opening and closing of the valve for the
water ow is done by pressing a lever on the side of the
group that, in turn, moves a camme within the group,
allowing or not allowing the passage of water:
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