3.
Aluminum tube and aluminum fins, coated
4.
Aluminum tube and aluminum fins, uncoated
5.
Copper tube and copper fins, uncoated
6.
Copper tube and aluminum fins, uncoated.
Research the project location atmospheric and water
conditions to determine there effects on cooling
tower materials. The research should include a
survey of existing towers. Base material selection
on life cycle cost analysis. Factory-assembled wood
cooling towers may be a restrictive product (i.e.,
three manufacturers may not exist). Level 1,
Contracting Officer, approval is required if it is
established conclusively that no option other than a
factory-assembled wood cooling tower will serve the
purpose, and less than three manufacturers exist.
Fire Safety: Design cooling towers having wood fill
with heat responsive devices and remote controls to
flood entire normal water distribution system in
case of fire in dry cells of cooling towers.
Indicate heat responsive devices under fan decks,
distribution basins, or in other locations where
necessary for activation. Where heat responsive
devices are inaccessible, provide controls to test
the system. Operation of heat responsive devices
shall activate building fire alarm system, stop
cooling tower fans, and provide both audible and
visual signals on the air conditioning central
control panel. Remote controls to flood normal
water distribution system shall be quick action
type. The design shall conform to the requirements
of NFPA 214 "Water-Cooling Towers."
**************************************************************************
2.7.1
Fire Safety
Towers shall conform to NFPA 214. Fire hazard rating for plastic
impregnated materials shall not exceed 25. Plastics shall not drip or run
during combustion. Determine ratings by ASTM E 84 or NFPA 255.
2.7.2
Enclosures
Enclosures shall meet tower manufacturer's recommendations.
2.7.3
Supporting Members
Where supporting members are indicated, verify their size and locations to
ensure the adequacy of the support systems. Provide modifications to tower
supports, steel members, and vibration isolation units for particular tower
to be furnished.
2.7.4
Factory-Assembled Towers
Cooling towers shall be factory-assembled type, conforming to FS A-A-59223
SECTION 15601N
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