/ Available Options /
■Cell Partition Options
Every Class 160 tower includes plenum partitions and hot water distribution basin partitions between adjacent cells. Plenum partitions keep air from entering an operating cell through an adjacent idle
Specify extra partitions carefully because excess partitions can sometimes discourage routine maintenance and good housekeeping procedures. Two options are available to meet specific design goals:
❑Fill area partitions are available, but usually not necessary.
The solid sheet design of film fill prevents water and air migration between the fill areas of adjacent cells in all operating modes.
❑Complete watertight partitions let you use adjacent cells to serve separate loads having incompatible system temperatures. Watertight partitions consist of exterior grade,
Optional weir gates in wood basin partitions let you mix or segregate the water in the basin to meet your operating needs.
■Cold Water Collection Basins
If you plan to locate your tower above grade, we can supply a treated Douglas fir cold water collection basin, complete with the necessary operating accessories. The basin floor is exterior grade,
Basin sides are also plywood, machined to fit the basin floor, providing a watertight joint after sealing.
The standard wood basin includes at least one or more depressed,
Each basin includes an overflow/cleanout connection consisting of a galvanized full coupling and
A float operated, mechanical makeup valve automatically replenishes water lost from the system. The valve is located in
the plenum chamber between fill banks, just inside the endwall access door to facilitate adjustment and maintenance.
■Fire Safety Options
On specific jobs you may want to weigh the cost of various modifications against the cost (and maintenance) of a sprinkler
❑
❑A ¹⁄₄″ thick
❑A ¹⁄₄″ FRC overlay on the distribution basin covers acts as a fire stop.
❑Barrier walls keep fire from spreading between cells in multicell towers. Specify barrier wall design by containment period, such as a
❑FRP casing having a flame spread rating of 25 or less.
If your insurance carrier insists on a sprinkler system for your tower, consult your Marley sales representative. We can provide a sprinkler system to fit your needs, or work with your people to be sure that the sprinkler system and tower will meet your specification.
■Non-Standard Motors
Although you can buy your Class 160 tower “less motor” at a cost reduction, it is not normally recommended. Motors supplied on Marley towers meet rigorous specifications developed from environmental chamber tests at our Development Center. These specifications represent prudent minimum design requirements.
Unless otherwise specified, motors provided are TEFC,
1.15service factor (appropriate to the applied load), 1800 RPM. Other enclosures (such as Explosion Proof) and motors specially wound for nonstandard voltages are available at extra cost.
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