Filter
Top Products
Specifications
Specification Value
Marley
/
MCW Cooling Tower
/
Specifications: Base
22
1.0 Base:
1.1 Furnish and install a forced-draft, coun-
terflow-type, factory assembled, film
fill, industrial duty, galvanized steel,
cooling tower. Unit shall consist of
_____cell(s),asshownonplans.The
limiting overall dimensions of the tower
shall be _____ wide, _____ long, and
_____ high. Total operating kW of all
fans shall not exceed
_____ kW, consisting of_____ @ _____
kWmotor(s).Towershallbesimilar
and equal in all respects to Marley
Model _____________________.
2.0 Thermal Performance:
2.1 The tower shall be capable of cool-
ing _____ L/s of water from _____ °C
to _____ °C at a design entering air
wet-bulb temperature of _____ °C.
The thermal performance rating shall
be Certified by the Cooling Technology
Institute.
3.0 Performance Warranty:
3.1 CTI Certification notwithstanding, the
cooling tower manufacturer shall guar-
antee that the cooling tower supplied
will meet the specified performance
conditions when the tower is installed
according to plan. If, because of a
suspected thermal performance defi-
ciency, the owner chooses to conduct
an on-site thermal performance test
under the supervision of a qualified,
disinterested third party in accordance
with CTI or ASME standards during the
first year of operation; and if the tower
fails to perform within the limits of
test tolerance; then the cooling tower
manufacturer will pay for the cost of
the test and will make such corrections
as are appropriate and agreeable to the
owner to compensate for the perfor-
mance deficiency.
■ 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 acceptable. Limitations
on physical size and total operating kW avoid the introduction of
unforeseen operational and site-related influences. Specifying the
number of cells, and the maximum fan kW/cell will work to your
advantage.
The benefit of a forced-draft counterflow cooling tower is that they
are inherently easy to operate, access, and maintain. Forced-draft
counterflow towers have all mechanical equipment located at low
level for easy access, and the water distribution system is accessible
by simply removing the lightweight drift eliminator panels or fill
access doors.
■ CTI Certification means that the cool-
ing tower has been tested under
operating conditions and found to
perform as rated by the manufacturer
under those circumstances. It assures
the buyer that the tower is not inten-
tionally or inadvertently undersized
by the manufacturer.
■ However, CTI certification alone is not sufficient to assure you that the
cooling tower will perform satisfactorily in your situation. Certification
is established under relatively controlled conditions, and cooling tow-
ers seldom operate under such ideal circumstances. They are affected
by nearby structures, machinery, enclosures, effluent from other
sources, etc. Responsible and knowledgeable bidders will take such
site-specific effects into consideration in selecting the cooling tower—
but the specifier must insist by the written specification that the
designer/manufacturer guarantee this “real world” performance. Any
reluctance on the part of the bidder should cause you some concern.