Philips Saeco Exprelia Series Service Manual page 21

EXPRELIA
Functional method for the production of milk-based beverages and circuit cleaning
When the solenoid valves open and let air or hot water/steam through, the following situations
occur:
• DC3+DC2
• DC2
• DC4
STEAM
AIR
STEAM
STEAM
Clean
(steam)
Milk-based
beverages DC2
(steam)
hot water /
steam
PRESSURE RELIEF VALVE
Saeco International Group
STEAM + AIR = Frothing and heating of frothed milk
STEAM FROM CENTRAL HOLE = Heating of non-frothed milk
STEAM FROM LOWER HOLE = Cleaning of milk circuits
MILK FROM
CARAFE
MILK FROM
CARAFE
MILK IN
CARAFE
DC4
Air
DC3
DC5
DC1
FROTHED HOT MILK
(CAPPUCCINO)
VENTURI
PIPE
HOT MILK
VENTURI
PIPE
CLEAN / RINSE
VENTURI
PIPE
DC1 = pressure relief valve assembly
DC2 = steam valve
DC3 = air valve
DC4 = clean valve (steam)
DC5 = hot water/steam valve
Rev. 00 / June 2010
04 OPERATING LOGIC
CARAFE ATTACHMENT
Page 03 / 11