© by N&W GLOBAL VENDING S.p.A. 43 02-2014 4535 00
ESPRESSO UNIT MAINTENANCE
Every 10,000 dispensed items or, however, every 6
months, a small maintenance intervention on the coee
unit is required for optimising its operation.
For performing the maintenance operations it is neces-
sary to remove the unit by following these steps:
- Disconnect the coffee outlet nozzle from the unit by
rotating it by 90° from the rod and pulling it outside.
- Act the unit end stop lever rotating it until the horizontal
position.
- Extract the coffee unit.
seal
In order to disassemble or replace the lter and the up-
per seal, follow these steps:
- Unscrew the key fixing lateral screw of the upper piston.
- Rotate the upper piston upwards.
- Remove and replace the upper seal.
- Unscrew the upper filter so that it can be removed and
replaced.
1
2
3
4
5
6
7
8
Fig. 26
1- Upper piston
2- Coffee outlet nozzle
3- Scraper
4- Rod
5- Lateral screw
6- Key
7- Upper piston seal
8- Espresso unit end stop lever
seal
In order to disassemble or replace the lter and the lower
seal, follow these steps:
- Manually bring the unit to the discharge position with
the lower piston.
- Unscrew the central fixing screw for removing the filter.
- Press on the end of the piston stem guide for obtaining
an extra run of the lower piston.
- Pull with a small screwdriver for sliding the lower piston
out from the piston stem being careful not to damage
the piston or the sealing elements
- Remove and replace the lower seal.
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