Synesso Espresso Machine, Technical Manual

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Technical Manual 18
Water Inlet Components (cont.):
Drain box:
Water flows into this box prior to going through the drain hose to the floor drain. It is important
to periodically pour small quantities of hot water down this drain box to clear any build up of
coffee oils inside the box.
Drain Hose:
Waste water and some grounds go down this tube to the drain. It’s important to keep this free
of clogs and maintain a steeply vertical path to the floor drain.
Drain tube from brew tanks:
This copper manifold allows water from the brew valves to discharge safely down the drain
after shots are completed. It also is directly connected to the drain system on the left
hand group, allowing the user to drain the left tank easily after depressurizing the system.
Expansion valve:
The brew tanks are completely saturated with water. As the tanks heat, the pressure increases
within the tank.The expansion valve allows this pressurizing water to release safely into the
drain box. The release point is 12 bar and is adjustable by turning the end of the valve with a
wrench clockwise to increase or counter clockwise to decrease.
Heat Exchanger tubes:
In order to maintain extremely stable brewing temperatures, Synesso™ incorporates heat
exchanger tubes which run from the water inlet side through the steam tank and then go to
each separate coffee boiler. The internal diameter of the heat exchangers are precisely
designed to aid in the energy efficiency and thermal stability of the Synesso™.
Cold Water Valve:
Synesso™ has 2 valves which provide water to the Americano (tea) spout: the hot water valve
and the cold water valve. The cold water input allows the user to moderate the temperature at
the spout to make drinks appropriate temperatures for their customers.
Hot Water Valve:
This valve supplies hot water from the steam tank (which is mixed with cold water from the
cold water valve) to the Americano (tea) spout.
Mix Valve Adjuster:
This butterfly valve allows the user to increase or decrease the amount of cold water (from the
cw valve above) going to the Americano (tea) spout. Turning this valve completely clockwise
shuts the cold water off, while turning it counter-clockwise allows more cold water in.
Synesso™ sets machines to have a steady flow of water, at approximately 203° F in bench
test.
Pressure Relief Valve (PRV):
The PRV is a safety release for the steam boiler which opens and releases pressure if the
boiler rises above 3.5 bar (50 psi). The PRV is housed inside the yellow tubing which
would direct any releases to the drain box, minimizing spray on the electronic valves.
HYDRAULIC SYSTEM