Open a hot tap Vikkimc. Your boiler should then go through the ignition sequence.
1/ Diverter valve moves to desired position
2/ Pump starts
3/ This is proved by the flow switch
4/ Fan starts
5/ This is proved by the Air pressure switch
6/ Gas valve opens on low rate
7/ At the same time sparks are generated at the spark electrodes
8/ Ignition is proved by the Flame rectification probe
9/ Gas valve opens to full rate or rate set by PCB
Just follow the sequence-Enjoy
M, December 2008
