Main Boiler Protection
- Both ID fans off - 2 sec
- Both FD fans off.
- Emergency trip from OWS/ PB CCR PB Both
- RH protection 10 sec
- Water wall cir. Not adequate 5 sec DP <10 psi)
- Furnace pr V high. +150 mm WC
- Furnace pr V low. ‐175 mm WC
- Drum level V high. 10 sec + 250mm
- Drum level V low. 15sec ‐ 375mm
- Low air flow <30% < 604T/Hr
- All Boiler Feed pumps tripped. 10 sec
- All SAPHs off.
- Flame failure trip.
- Loss of all fuel trip
- Loss of 220 V DC 2 sec.
- Less than FB &loss of 110 AC at any elevation in service
- Loss of 24V DC
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