SPX Cooling Technologies 1000 Humidifier User Manual


 
Specifications
Marley
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Sigma 1000/1200 Cooling Tower
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Specifications: Options
27
Specification Value
Oil Level Sight Glass:
5.4 Replace paragraph 5.4 with the fol-
lowing: A galvanized oil gauge and
drain line shall extend from the gear
reducer to the vicinity of the motor,
and shall be equipped with a bronze-
bodied oil level sight glass.
Miscellaneous Options
Wood Cold Water Basin:
10.1 Replace paragraph 10.1 with the fol-
lowing: Include a cold water collection
basin constructed of pressure treated
Douglas Fir plywood. Basin floor shall
be 3/4" thick 5-ply, supported by 6"
deep joists on 2'-0" centers. Basin
sides shall be 1" thick, 7 ply. The basin
floor shall lock into a dado groove in
the sides to form a watertight seal. A
depressed, side outlet sump of either
FRP or hot-dip galvanized steel having
a 1/4" thick faceplate drilled for a stan-
dard class 125 ASME flange connec-
tion will be included. An appropriately
sized (4" diameter or larger) galvanized
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 adja-
cent to the endwall access door.
Redwood Components:
Hot Water Basin Covers:
7.3 Add the following paragraph in
the Hot Water Distribution System
section: The distribution basins shall
include treated Douglas Fir plywood
covers at least 3/4" thick. These covers
shall be designed to withstand 60 psf
live load, and shall be easily removable
for maintenance.
Air Inlet Screens:
6.3 Add the following paragraph to the
Fill, Louvers and Drift Eliminators
Section: The air inlet faces of the
tower shall be covered by 1" mesh
hot-dip galvanized welded wire
screens. Screens shall be mounted in
galvanized steel U-edging and shall be
removable.
The oil level sight glass is a convenience
item that is preferred by many users. The
same purpose is, of course, served by either
the dip stick or the sight glass.
Marley basins are used to permit the installation of towers on
elevated platforms or foundations. The cross section drawing on
page 4 shows the relationship of the optional basin, sump and
overflow to a typical steel I-beam support platform.
Most of the wood components in the tower are available of pres-
sure treated redwood. However, redwood lacks the strength of
Douglas Fir, which may require structural modifications of the
tower. Please discuss the available redwood options with your
Marley sales representative.
These covers are designed to keep leaves and debris out of the
circulating water system. They also serve to suppress algae for-
mation by shielding the incoming hot water from direct sunlight.
In wooded or windy areas, these screens help to keep leaves or
blowing debris out of the cooling tower and circulating water
system.