5.1.1 A manual system should become operational
through the opening of not more than one shutoff valve on the discharge
side of the pump. This valve should be referred to as the control
valve and should be located outside the space being protected.
5.1.2 Control valves should be readily accessible
by crew members and operable without special tools or keys.
5.1.3 Control valves should be fitted with remote
actuators that are controlled from the operating compartment or manual
break glass stations, if fitted. Control valves should have local
manual overrides.
5.1.4 Control valves should be capable of being
manually opened within 45 s with a torque not exceeding 45 Nm under
full pump flow conditions. This should be tested at 6 month intervals.
5.1.5 Means should be provided to secure all other
valves capable of impairing system operation in the open or “ready"
position.
5.2 Automatic and other systems
5.2.1 Means should be provided in automatic and
other systems to secure control valves and other valves capable of
impairing system operation in the open position.
5.3.1 All valves should be labelled indicating
their function and normal position. Control valves should also indicate
the areas served.
5.3.2 All valves should be provided with means
to indicate whether they are open or closed.