Filter
Top Products
Specifications
Specification Value
Marley
/
MCW Cooling Tower
/
Specifications: Base
24
ment.Fan(s)shallbedriventhrough
one-piece, multi-groove, V-belt, pulleys,
and spherical roller bearings. Bearings
shall be rated at an L
10
life of 50,000
hours, or greater. A hinged motor
adjustment plate with threaded ten-
sioning bolts shall be installed to allow
correct belt tensioning.
6.2 Motor(s)shallbe____kWmaximum,
Totally Enclosed, 1.15 service factor,
variable torque, and specially insu-
lated for cooling tower duty. Speed
and electrical characteristics shall be
______ RPM, single-winding, 3 phase,
50 hertz, ____ volts. Motor shall oper-
ate in the shaft-horizontal position and
nameplate kW shall not be exceeded
at design operation
6.3 The complete mechanical equipment
assembly for each cell shall be sup-
ported by a rigid, galvanized steel
structural support that resists misalign-
ment between the motor and sheaves.
The mechanical equipment assembly
shall be warranted against any failure
caused by defects in materials and
workmanshipfornolessthanfive(5)
years following the date of tower ship-
ment. This warranty is limited to the
fan, fan shaft, bearings, sheaves and
mechanical equipment support. The
motor,motorcomponentsandbelt(s)
are warranted by their manufacturer.
7.0 Fill and Drift Eliminators:
7.1 Fill shall be cross-corrugated,
counterflow film type, thermoformed
from .40mm thick PVC. Fill shall be
assembled into modules for ease of
removal and cleaning. Fill shall be sup-
ported on galvanized channel sections
supported from the tower structure.
Drift eliminators shall be PVC, triple
pass and shall limit drift losses to
0.005% or less of the design water
flow rate.
8.0 Hot Water Distribution System:
8.1 A pressured spray system shall distrib-
ute water evenly over the fill. Header
and branch arms shall be PVC with
polypropylene spray nozzles attached
to the branch arms by an integral
screw connection for ease of removal
and cleaning. A flanged connection on
the header shall be provided for attach-
ment to process piping.
Unless otherwise specified, motor speed will be 1500 RPM, 50 Hertz
on standard models. If you prefer the operating flexibility of two-
speed operation, please specify two-speed, single-winding motors
which offer full and half speeds for maximum energy savings.
Incidentally, two speed motors are a far better choice than separate
“pony” motors which simply double the problems indicated above.
The value of a 5 year mechanical equipment warranty speaks for
itself.
■ Fill modules can be removed for inspection and cleaning in accor-
dance with local anti legioinella guidelines.
Drift rate varies with design water loading and air rate, as well as drift
eliminator depth and number of directional changes. A drift rate of
0.001% is readily available in standard configuration without premi-
um cost. If a lower rate is required, please discuss with your Marley
sales representative.
■ The combination of PVC piping and polypropylene nozzles is very
resistant to the build-up of scale and slime.