Thermal Control In The - Biasi RINNOVA ADAPTIVE M300V.2025 SM Service Manual

9 .7 Thermal control in the

circulator on
YES
temperature higher than that
starts ignition discharges
Opens gas valve
beginning of ignition period
NO
NO
Is fan rpm
exact?
safety thermostat or flue
NO
temperature probe lock out?
Figure 9 .12
- 26 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
mode
Switch in the
YES water from the domestic hot
Is primary circuit
selected?
NO
YES
starts fan
checks fan rpm
Is fan rpm
NO
exact?
End of wait
YES
period?
End of ignition
YES
period?
YES
YES
function mode
Taking
water circuit?
Main circuit pressure
YES
switch consense?
lock memorised?
temperature higher than 110°C?
YES
flame presence?
NO
flame presence?
NO
closes gas valve
stops fan
interrupts ignition discharges
memorizes lock
display show lock--- out
reset key
NO
pressed?
flame presence?
YES
circulator off
NO
fan still
YES
NO
stop circulator (3min)
NO
cancels lock
Is flue
YES
beginning of wait period
YES
interrupts ignition discharges
YES
gas valve open
fan runs
YES
NO
NO