Specifications: Base; Base; Thermal Performance; Performance Warranty - SPX Cooling Technologies Cooling Tower Marley MD Engineering Data

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Marley MD
Specifications
1.0

Base:

1.1
Furnish and install an induced-draft,
counterflow-type, factory assembled,
film fill, industrial duty, cooling tower.
Unit shall consist of _____ cell(s), as
shown on plans. The limiting overall
dimensions of the tower shall be _____
wide, _____ long, and _____ high. Total
operating power of all fans shall not
exceed _____ kW, consisting of_____
@ _____ kW motor(s). Tower shall be
Marley Model _____________________.
2.0

Thermal Performance:

2.1 The tower shall be capable of cool-
ing _____ m 3 /hr 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. Tower shall comply with all
ASHRAE 90.1 standards.
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
as shown on the plans. 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, ASME or other applicable
standards during the first year of oper-
ation; 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 appro-
priate and agreeable to the owner to
compensate for the performance defi-
ciency.
Cooling Tower /

Specifications: Base

Specification Value
Your specification base establishes the type, configuration, base materi-
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al, 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 horsepower avoid the introduction of unforeseen operational
and site-related influences. Specifying the number of cells, and the max-
imum fan hp/cell will work to your advantage.
You are specifying a counterflow tower, which is a type noted—and usu-
ally specified—for its economical use of plan area on projects where
the required thermal performance is very difficult. It effectively replaces
most makes of older towers—both forced-draft and induced-draft—with-
out major redesign of the existing site.
CTI Certification means that the cooling
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tower has been tested under operat-
ing conditions and found to perform as
rated by the manufacturer under those
circumstances. It assures the buyer that
the tower is not intentionally or inadver-
tently undersized by the manufacturer.
However, CTI certification alone is not sufficient to assure you that the
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cooling tower will perform satisfactorily in your situation. Certification
is established under relatively controlled conditions, and cooling towers
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 speci-
fier must insist by the written specification that the designer/manufac-
turer guarantee this "real world" performance. Any reluctance on the
part of the bidder should cause you some concern.
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