Rational SCC Series

9
CM
Edition 10-2008
Water level control Steam Generator
V
AC
S2
M4
Y1
Y2
B2
S2
B5
F3
Center S2 ==> Ground: 2 - 6V AC: water level too low
steam heating must switch OFF
solenoid valve  lling Y1 ON
Center S2 ==> Ground: 0V AC: water level reached
steam heating can switch ON
solenoid valve  lling Y1 switched OFF
Every 2 minutes steam elements will switch off for
water level control
PCB
X12
1 2 3 4