Electrolux W475 - Page 99

99
1
2a 2b
5 4
K21
K22
6
3
1 2
5
4
3
Y51
3
4
6665A
6666
3
4
Function (machines built for mop washing)
Electricheatingwithoutfusiblecut-outon
element
The three heating elements in the machine are
connected to separate phases and switched on
andoffusingtwoserialheatingcontactors.Hea-
tingcontactorK21iscontrolledbyprogramme
unitA1,output(x36:7).HeatingcontactorK22is
regulated by a standalone mechanical level con-
trol.Inorderforbothcontactorstobeactivated,
the level in the machine must have been appro-
ved by both the level control in programme unit
A1andthemechanicallevelcontrol.
Thewaterlevelinthemachinemustbe90scale
unitsormoreinorderforthemechanicallevel
control to be activated.
Theprogrammeunitreceivesinformationonthe
water temperature in the machine through an
analoguesignalfromthetemperaturesensor
situated in the outer drum. The programme unit
controls the heating contactors to achieve the
setwatertemperatureforthecurrentwashing
programme.
The mechanical level control prevents the ele-
mentfromactivatingiftheprogrammeunitor-
dersheatdespitethefactthatthereisnowater
in the drum.
Steamheating
The steam valve is controlled by the programme
unitA1,output(X336:7).
Heating
 1. Heatingelements
2a. ProgrammeunitA1
2b. Interlocksignal
 3. Supplyvoltage
 4. Temperaturesensor
 5. I/OBoard
 6. Levelcontrol
 1. Steamvalve
 2. ProgrammeunitA1
 3. Rearcontrolunit
 4. Temperaturesensor
5. I/O-card