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Specification Value
Marley
/
Sigma F Series Cooling Tower
/
Specifications: Base
12
1.0 Base:
1.1 Furnish and install an induced-draft,
crossflow-type, field-erected, structural
fiberglass-framed, PVC film-fill, industrial-
duty cooling tower of _____ cell(s), as
shown on Plans. The limiting overall
dimensions of the tower shall be _____
wide, _____ long, and _____ high to the
top of the fan cylinder. Total operating
horsepower of all fans shall not exceed
____ hp, driven by ___ @ _____ hp
motor(s). Pump head, including static lift
above top of cold water basin curb (or
top of supporting steel), shall not exceed
____ feet of water. Tower shall be simi-
lar and equal in all respects to Marley
Sigma F Series, Model _______.
■ Your specification base establishes the type, configuration, base
material, and physical limitations of the cooling tower to be
quoted. During the planning and layout stages of your project,
you will have focused your attention on a cooling tower selection
that fits your space allotment, and whose power usage is accept-
able. Limitations on physical size and total operating horsepower
avoid the introduction of unforeseen operational and site-related
influences. Specifying the number of cells, and the maximum fan
hp/cell will work to your advantage.
Your reason for specifying a crossflow type is that crossflow tow-
ers are noted for the accessibility and maintainability of all oper-
ating components. The spacious interior provides easy access
to fill, drift eliminators, all basin accessories—and is one of two
primary accessways to the fan, Geareducer, and other mechani-
cal components.
At the fan deck level, the hot water distribution basins are easily
inspected and cleaned—while the tower is operating, if neces-
sary. The mechanical equipment can also be readily accessed
from this level.
Except for the cold water basin, no counterflow tower component
requiring routine maintenance is as easily accessed. The confined
areas that typify counterflow designs, particularly of forced draft
configuration can make difficult work for maintenance personnel!