SPX Cooling Technologies FSIG-TS-08A Specifications, Specification Value, 2.0Thermal Performance

Marley / Sigma F Series CoolingTower / Specifications: Base 13

Specifications Specification Value

2.0Thermal Performance:

2.1	The tower shall be capable of cooling	■Your reason for purchasing a cooling tower is to obtain a con-
	_____ GPM of water from ____ °F to	tinuing flow of cooled water as defined in the first paragraph at
	_____ °F at a design entering air wet-	left. If the tower that you purchase is incapable of performing
	bulb temperature of _____ °F. The cool-	as specified, then you will not have received full value for your
	ing tower manufacturer shall guarantee	money.
	that the tower supplied will meet	Bear in mind that the size—and cost—of a cooling tower var-
	the specified performance conditions
	when the tower is installed according	ies directly with its true thermal capability. This paragraph is
	to plans.	intended to protect you against either intentional or inadvertent
		undersizing of the tower by the manufacturer. Judging the level
2.2	The purchaser will arrange for an	of performance of a cooling tower on critical processes is never
	on-site thermal performance test, to	easy, and the potential risk of a non-performing cooling tower
	be conducted in the presence of the	usually causes the requirement for a mandatory acceptance test
	manufacturer and owner, and under	to be very desirable.
	the supervision of a qualified, disinter-	Your contract with the successful bidder should establish the
	ested third party in accordance with
	CTI (Cooling Technologies Institute)	acceptable remedies for missed performance, which might
	ATC-105 standards during the first	include:
	full year of operation. If the tower	• The addition of one or more cells of tower, as necessary, to
	fails to perform within the limits of
	test tolerance, then the cooling tower	bring the cooling tower to the specified level of performance.
	manufacturer will install additional cells	This is usually limited to the scope of work as defined in the
	and/or make such corrections as are	specs, which means that you (the owner) will have to pay for
	agreeable to the owner and shall pay	the additional basin, wiring, starters, piping, etc.
	for the cost of a retest. If the tower	• The reimbursement of a portion of the total contract price equal
	still fails to perform as specified, then
	the manufacturer shall make such	to the percentage deficiency in performance.
	reimbursements as are appropriate and	Under no circumstances should you allow the manufacturer to
	agreeable to the owner to compensate
	for the performance deficiency.	repitch the fans to increase motor brake horsepower above that
		shown in the proposal. That creates additional operating costs
		that will continue for the life of the tower—and imposes no
		penalty on the manufacturer.

	95°
	90°
	85°
(°F)
TEMP.	80°
							5°F RANGE
WATER
	75°						10°F RANGE
							15°F RANGE
COLD	70°
	65°
	60°
	55°
	50°	55°	60°	65°	70°	75°	80°

WET BULB TEMP. (°F)

Typical cooling tower performance curve.