Ignition And Control Sequence - Biasi RIVA PLUS HE 24C ERP Service Manual

10 .14

Ignition and control sequence

NO
end of ignition
NO
YES
Figure 10 .27
ELECTRONIC CONTROL/IGNITION P.C.B.
YES
NO
NO
NO
Air pressure sensor
at work?
NO
YES
period?
NO
YES
NO
Air pressure sensor
at work?
Ignition request
lock memorised?
Air pressure sensor
at rest?
Air pressure sensor
at work?
presence of flame?
YES
starts ignition discharges
opens gas valve
beginning of ignition period
flame presence?
closes gas valve
stops fan
interrupts ignition discharges
memorizes lock
turns on lock--- out light
reset push--- button
pressed?
flame presence?
safety thermostat or flue
temperature probe lock out?
NO
NO
cancels lock
YES
starts fan
YES
beginning of wait period
YES
YES
interrupts ignition discharges
gas valve open
YES
NO
closes gas valve
YES
- 27 -