SPX Cooling Technologies FSIG-TS-08A Specifications, Specification Value, Basin Heater

Marley / Sigma F Series CoolingTower / Specifications: Options 20

Specifications

Cold Water Basin Options

Stainless Steel Cold Water Basin:

10.1Replace paragraph 10.1 with the following: Include a cold water col- lection basin constructed of 12 gauge series 304 stainless steel, through- bolted and sealed to prevent leakage. A depressed, side outlet sump of series 304 stainless steel having a 1⁄4" (6.4 mm) thick faceplate drilled for a standard class 125# ASME flange con- nection will be included. A removable stainless steel 1⁄2" mesh debris screen shall cover the top of the sump. An appropriately sized (4" diameter or larg- er) stainless steel standpipe overflow shall be provided. The standpipe shall be removable for flush-out cleaning of the basin. A float-operated, mechanical makeup valve shall also be included, installed adjacent to the endwall access door.

Watertight Partition between Tower Cells with Stainless Steel Cold Water Basin Option:

10.2Replace paragraph 10.2 with the following: Stainless steel watertight partitions shall be provided between cells in the cold water basin. They shall be sealed watertight to the partitions in the fill and plenum areas of the tower. Cold water basin partitions shall have weir openings allowing free flow of water between cells. Weirs shall be equipped with bolt-on, gasketed cover plates to prevent water passage when required.

Basin Heater:

10.3Add the following paragraph in the Cold Water Basin section: Add the following paragraph in the Cold Water Basin section: Provide a system of electric immersion heaters and con- trols to prevent freezing of water in the collection basin during periods of shutdown. The system shall consist of one or more stainless steel electric immersion heaters. A NEMA 4 enclo- sure shall house a magnetic contactor to energize heaters; a transformer to provide 24 volt control circuit power;

Specification Value

■Marley basins are used to permit the installation of towers on elevated platforms or foundations.

This is the simplest of several cold water basin designs available for the Sigma F Series towers. If preferred, a 10 gauge welded stainless steel basin can be installed.

■In addition to the normal partition function of preventing air bypass (page 14), this option allows you to use each partitioned cell of your tower independently. This is valuable where a single multicell tower is serving several separate systems—or where winter operation may require less than full tower capability.

■The basin heater components described at left represent is rec- ommended for a reliable automatic system for the prevention of basin freezing.

The ambient air temperature that you fill in should be the lowest 1% level of winter temperature prevalent at site.