Ferroli SUN M 50 Instrucciones De Uso página 46

Min. gas pressure switch setting
The purpose of the min. gas pressure switch is to prevent the burner starting or to stop it if operating.
If the gas pressure is not the required minimum, it must be set 40% lower than the gas pressure value
in operation with max. delivery.
Ionisation current check
The minimum value of 1µA must be respected without wide fluctuations.
Supervision of the flame with ionisation is obtained through the effect of conductivity and rectification
of the flame. The flame signal amplifier only responds to the flame signal DC component. A short circuit
between the ionisation probe and earth causes shutdown of the burner.
Key
C Electrolytic capacitor 100...470 µF; DC 10...25 V
ION Ionisation probe
M Microammeter, Ri max. 5000 W
46
fig. 9
Measurement circuit
1
LME...
fig. 10
Cod. 35447687 - Rev. 00 - 12/2012
SUN M50 - M70
M
C
ION
GB