What 2 firefighting systems will not be operational if electrical power is not available ?
Underwharfs nozzles and foam pumps
If the firefighting systems are to be operated manually, what must be done prior to this operation?
Electrical power must be turned off to the valves and the monitors
What will happen to the Bray actuators if electrical power is restored ?
The valves will automatically close - CAREFUL , this is why the power must be shut off before using manually, as it will not let you open the valve if thee is still power