SPX Cooling Technologies Marley MD Marley / MD CoolingTower / Specifications Base, 1.0Base

Marley / MD CoolingTower / Specifications: Base

Specifications Specification Value

1.0Base:

28

1.1	Furnish and install an induced-draft,	■ Your specification base establishes the type, configuration, base materi-
	counterflow-type, factory assembled,	al, and physical limitations of the cooling tower to be quoted. During the
	film fill, industrial duty, cooling tower.	planning and layout stages of your project, you will have focused your
	Unit shall consist of _____ cell(s), as	attention on a cooling tower selection that fits your space allotment, and
	shown on plans. The limiting overall	whose power usage is acceptable. Limitations on physical size and total
	dimensions of the tower shall be _____	operating horsepower avoid the introduction of unforeseen operational
	wide, _____ long, and _____ high. Total	and site-related influences. Specifying the number of cells, and the max-
	operating power of all fans shall not	imum fan hp/cell will work to your advantage.
	exceed _____ kW, consisting of_____	You are specifying a counterflow tower, which is a type noted—and usu-
	@ _____ kW motor(s). Tower shall be	ally specified—for its economical use of plan area on projects where
	Marley Model _____________________.	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.

2.0Thermal Performance:

2.1	The tower shall be capable of cool-	■ CTI Certification means that the cooling
	ing _____ m3/hr of water from ____	tower has been tested under operat-
	°C to _____ °C at a design entering	ing conditions and found to perform as
	air wet-bulb temperature of _____ °C.	rated by the manufacturer under those
	The thermal performance rating shall	circumstances. It assures the buyer that
	be Certified by the Cooling Technology	the tower is not intentionally or inadver-
	Institute. Tower shall comply with all	tently undersized by the manufacturer.
	ASHRAE 90.1 standards.

3.0Performance Warranty:

3.1	CTI Certification notwithstanding, the	■ However, CTI certification alone is not sufficient to assure you that the
	cooling tower manufacturer shall guar-	cooling tower will perform satisfactorily in your situation. Certification
	antee that the cooling tower supplied	is established under relatively controlled conditions, and cooling towers
	will meet the specified performance	seldom operate under such ideal circumstances. They are affected by
	conditions when the tower is installed	nearby structures, machinery, enclosures, effluent from other sources,
	as shown on the plans. If, because of	etc. Responsible and knowledgeable bidders will take such site-specific
	a suspected thermal performance defi-	effects into consideration in selecting the cooling tower—but the speci-
	ciency, the owner chooses to conduct	fier must insist by the written specification that the designer/manufac-
	an on-site thermal performance test	turer guarantee this “real world” performance. Any reluctance on the
	under the supervision of a qualified,	part of the bidder should cause you some concern.
	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.