9 The system should be capable of manual release.
10 The system should be capable of fire extinction,
and tested to the satisfaction of the Administration in accordance
with Appendix B to these guidelines.
11 The system should be available for immediate
use and capable of continuously supplying water for at least 30 minutes
in order to prevent re-ignition or fire spread within that period
of time. Systems which operate at a reduced discharge rate after the
initial extinguishing period should have a second full fire-extinguishing
capability available within a 5-minute period of initial activation.
A pressure tank should be provided to meet the functional requirements
stipulated in SOLAS regulation II-2/12.4.1,
provided that the minimum water capacity is based on the design criteria
of paragraph 19 plus the filling
capacity of the piping.
12 The system and its components should be suitably
designed to withstand ambient temperature changes, vibration, humidity,
shock, impact, clogging and corrosion normally encountered in machinery
spaces or cargo pump-rooms in ships. Components within the protected
spaces should be designed to withstand the elevated temperatures which
could occur during a fire.
13 The system and its components should be designed
and installed in accordance with international standards acceptable
to the Organizationfootnote and manufactured
and tested to the satisfaction of the Administration in accordance
with appropriate elements of Appendices
A and B to these guidelines.
14 The nozzle location, type of nozzle and nozzle
characteristics should be within the limits tested to provide fire
extinction as referred to in paragraph
10.
15 The electrical components of the pressure source
for the system should have a minimum rating of IP 54. The system should
be supplied by both main and emergency sources of power and should
be provided with an automatic change-over switch. The emergency power
supply should be provided from outside the protected machinery space.
16 The system should be provided with a redundant
means of pumping or otherwise supplying the water-based extinguishing
medium. The system should be fitted with a permanent sea inlet and
be capable of continuous operation using seawater.
17 The piping system should be sized in accordance
with an hydraulic calculation techniquefootnote.
18 Systems capable of supplying water at the full
discharge rate for 30 minutes may be grouped into separate sections
within a protected space. The sectioning of the system within such
spaces should be approved by the Administration in each case.
19 In all cases the capacity and design of the
system should be based on the complete protection of the space demanding
the greatest volume of water.
20 The system operation controls should be available
at easily accessible positions outside the spaces to be protected
and should not be liable to be cut off by a fire in the protected
spaces
21 Pressure source components of the system should
be located outside the protected spaces.
22 A means for testing the operation of the system
for assuring the required pressure and flow should be provided.
23 Activation of any water distribution valve
should give a visual and audible alarm in the protected space and
at a continuously manned central control station. An alarm in the
central control station should indicate the specific valve activated.
24 Operating instructions for the system should
be displayed at each operating position. The operating instructions
should be in the official language of the flag State. If the language
is neither English nor French, a translation into one of these languages
should be included.
25 Spare parts and operating and maintenance instructions
for the system should be provided as recommended by the manufacturer.