ETL 1110-3-484
26 Sep 97
Assure that the equipment is arranged to facilitate maintenance and regular testing. In particular,
assure that AFFF bladder tanks are of the horizontal type and located with sufficient space at one
end to permit removal and replacement of bladders. As much as practicable, arrange components
to be serviceable from the floor. Otherwise, work platforms may be necessary.
6.4 Fire Pump Building or Room. Fire pumping systems for most hangar fire protection
systems can provide water supply to the facility included in the current design project as well as
future hangars. These pumping systems often involve multiple, high-capacity, diesel engine-
driven fire pumps. It is therefore preferred to locate and arrange such pumping systems in a
separate pump house or building adjacent to the water storage tanks from which the pumps take
suction. This pump facility will house the pumps, drivers, controllers, fuel tanks, test headers and
associated equipment. The configuration of the equipment space should consider the need to test,
maintain and even replace major components of the system. If the fire pump installation must be
co-located with the AFFF concentrate tank, proportioning equipment, valve header, and control
panels, assure that adequate space is allocated to facilitate maintenance of all subsystems.
6.5 Drawing Details. Include details of critical system components including valve headers,
nozzles, concentrate tanks, test headers, and etc. Clarify, to the greatest extent possible, the
design intent. A number of standard details can be found in the CADD Details Library distributed
by the Tri-Service CADD/GIS Technology Center. Keep in mind that these details must be
customized for specific applications.
7. ELECTRICAL DRAWINGS.
7.1 Building Fire Alarm System. It is customary to include the building alarm system as part of
the electrical design and to show the system on electrical rather than fire protection drawings.
While this is considered appropriate, it is important that the design of the fire alarm system be
coordinated with the design of the foam system, specifically the foam system control panel. In
some cases, such as where there is a wet-pipe foam-water sprinkler system and no nozzles, there
may be no need for a foam system control panel. In such cases, the building fire alarm panel can
be used to perform all alarm and supervisory functions.
7.1.1 Riser Diagram. Identify and group the various inputs and outputs associated with the fire
alarm control panel, similar to what is done for the foam system control panel. This will include
alarm initiating and supervisory input circuits as well as alarm notification output circuits.
7.2 Fire Protection Equipment Power. On the electrical drawings, clearly indicate power to
fire pumps, fire pump controllers, foam concentrate pumps and controllers, foam system and fire
alarm system control panels. Assure that power supply arrangements to pumps are in compliance
with NFPA 20, Centrifugal Fire Pumps. This applies to centrifugal fire pumps (water) as well as
gear or vane type pumps used for AFFF concentrate. In particular, assure that disconnecting
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