Siemens System 3 Manual page 25

Section V — Detector Application and Spacing
Areas to be Protected
— ACCOMMODATION SPACES (ION,
PHOTO)
Halls, dining rooms, lounges, and other
areas of this type with permanent walls,
corridors, sanitation facilities, cabins,
offices, infirmaries, and leisure rooms not
containing cooking appliances.
— SERVICE AREAS (ION, PHOTO, TEMP)
Service cabinets, radio rooms,
strongrooms, stores, workshops other
than machinery spaces, and similar
areas, including shafts going to them,
as well as life-vest storage areas.
— SPECIAL AREAS (ION, PHOTO, TEMP)
Closed areas for transport of special
materials.
— SAFETY STATIONS (ION, PHOTO,
TEMP)
Areas housing the radio equipment, major
navigation equipment, standby
generator and central installations.
— MACHINERY SPACES (ION, PHOTO,
TEMP)
Areas housing the propulsion unit,
boilers, liquid-fuel handling units,
stabilization equipment, ventilation and
air conditioning equipment, and similar
areas, including the shafts running to them.
20
Monitoring Machinery Spaces
Because of the irregular shape of most
machinery spaces and the strong air
currents present, the number and type of
detectors used cannot be based on the
area protected, as is in the common
practice on land-based installations and
ship accommodation spaces. The best
design approach is to pick out all potential
fire outbreak areas and place a fire detector
above each of them at deck level. Areas of
potential fire risk include the following:
— Auxiliary boiler front
— Main boiler front
— Fuel oil pressure pumps
— Auxiliary generator sets
— Main diesel engine fuel oil pumps
and injectors
— Fuel oil purifiers
— Lubricating oil purifiers
— Fuel oil transfer pumps
— Workshops
— Electrical switchboards
— Storerooms
Locate additional detectors with fairly wide
spacing to give general cover to areas not
containing special risk.