Unit installation

47
Speed from phase 11 (transfer to boiler control unit)
Phase Control thermostat
Fan Ignition setting
100%
Fan Relay Air pressure switch Safety valve
Y1
Ignition/ solenoid valve/ servomotor Flame signal Gas pressure switch Choke valve (optional)
Y2
Safety temperature limiter
Input
Output Output
Input
Output Output Output
Input Input
01 Error
= ON = OFF = ON or OFF
02 03 04 05 06 07 08 09 10 11 12 13 17 18 20 01 19 21
= ON, if speed is min.
Input
Burner control unit flow chart
Burner control unit flow chart
5692 907 GB