SPX Cooling Technologies SS-NC-08A Thermal Performance and Efficiency, Warranty, Design Loading

Marley / NC Class Stainless CoolingTower / Specifications: Base 5

Specifications Specification Value

2.0Thermal Performance and Efficiency:

2.1	The tower shall be capable of cooling	■ CTI Certification means that the tower
	_____ m3/h of water from ____ °C to	has been tested under operating condi-
	_____ °C at a design entering air wet-	tions and found to perform as rated by
	bulb temperature of _____ C and its	the manufacturer under those circum-
	thermal rating shall be Certified by the	stances. It assures the buyer that the
	Cooling Technology Institute.	tower is not intentionally or inadvertent-
		ly undersized by the manufacturer.

2.2The tower shall be capable of a mini-

	mum _____ m3/h/kilowatt efficiency per	■ The minimum efficiency per ASHRAE
	ASHRAE Standard 90.1.	Standard 90.1 for induced draft open cooling towers applied to comfort
		cooling is 8.68 kW @ 35/29.5/24. There are no efficiency requirements for
2.3	CTI Certification notwithstanding,	non-comfort cooling applications. If you want greater efficiency you can
	the cooling tower manufacturer shall	require it by specifying a higher ASHRAE Standard 90.1 m3/h/kilowatt.
	guarantee that the tower supplied	■ CTI certification alone is not sufficient to assure you that the tower
	will meet the specified performance
	conditions when the tower is installed	will perform satisfactorily in your situation. Certification is established
	according to plan. If, because of a	under relatively controlled conditions, and towers seldom operate
	suspected thermal performance defi-	under such ideal circumstances. They are affected by nearby structures,
	ciency, the owner chooses to conduct	machinery, enclosures, effluent from other towers, etc. Responsible and
	an on-site thermal performance test	knowledgeable bidders will take such site-specific effects into consider-
	under the supervision of a qualified,	ation in selecting the tower—but the specifier must insist by the written
	disinterested third party in accordance	specification that the designer/manufacturer guarantee this “real world”
	with CTI or ASME standards during the	performance. Any reluctance on the part of the bidder should cause you
	first year of operation; and if the tower	some concern.
	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.

3.0Warranty:

3.1The entire tower, including struc- ture, casing, basins, decking, fan(s), motor(s), and all mechanical drive com- ponents (including belts, if used) shall be warranted against failure due to defects in materials and workmanship for a period of five (5) years from the date of shipment to the job. Towers not covered by a warranty of this scope will not be accepted.

4.0	Design Loading:
4.1	The tower structure, anchorage and all	■ It is important to understand the distinction between structure and
	its components shall be designed by	anchorage. Specifying that only the anchorage meet these require-
	licensed structural engineers per the	ments means the tower can become non-functional, even fall down, yet
	International Building Code to with-	remain attached to the foundation. Specifying structure will require the
	stand a wind load of 1.44k/Pa, as well	tower to remain operational.
	as a .3g seismic load. The fan deck	The indicated design values are the minimum allowables under accept-
	and hot water basin covers shall be	ed design standards. They give you assurance that the tower can be
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