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english -
19
R
espresso coffee machine - technician instructions
5.3 EXTRACTABLE EXCHANGER SYSTEM
Heating of the delivery group is provided by direct contact with the boiler. Water used for delivery of coffee is taken from a so-called "extract-
able" exchanger which is immersed in the water of the boiler:
• the activation of the solenoid valve and of the pump allows cold water to enter the exchanger
(1)
.
• from the exchanger
(1)
the boiler water is carried to the group
(2)
for delivery;
• the pump allows the increase of the pressure of the water flow up to 8-9 bar.
The version of the extractable exchanger for the Italian market does not include the intake device
(3)
and the seal
(4)
.
If necessary, the exchanger can be replaced without having to remove the flange: loosen the screws, remove the delivery group from the boiler
and remove the exchanger. These operations should be carried out after the machine has been switched down and has cooled off: always
replace the seals.
5.2 CARTRIDGE EXCHANGER SYSTEM
Heating of the delivery group is provided by direct contact with the boiler. Water used for delivery of coffee is taken from a so-called "cartridge"
exchanger which is immersed in the water of the boiler:
• the activation of the solenoid valve and of the pump allows cold water to enter the exchanger
(1)
;
• from the exchanger
(1)
the boiler water is carried to the group
(2)
for delivery;
• the pump allows the increase of the pressure of the water flow up to 8-9 bar.
If necessary, the exchanger can be replaced by removing the flange and disconnecting the relative pipes of the hydraulic circuit.
These operations should be carried out after the machine has been switched down and has cooled off: always replace the seals.
Water inlet
Coffee delivery
2
1
Water inlet
Coffee delivery
1
Italian market
version
2
3
4