Marley
/
MH
Fluid Cooler
/
Specifications: Base
Specifications
Specification Value
13
ppm as Cl-); a sulfate content (as SO4)
up to 250 ppm; a calcium content (as
CaCO3) up to 500 ppm; silica (as SiO2)
up to 150 ppm; and design operat-
ing ranges up to 50°F (27.8°C). The
circulating water shall contain no oil,
grease, fatty acids, or organic solvents.
6.2
The specifications, as written, are
intended to indicate those materials
that will be capable of withstanding the
above water quality in continuing ser-
vice, as well as the loads described in
paragraph 6.1. They are to be regarded
as minimum requirements. Where
component materials unique to indi-
vidual tower designs are not specified,
the manufacturers shall take the above
water quality and load carrying capabili-
ties into account in the selection of
their materials of manufacture.
7.0
Mechanical Equipment
:
7.1
Fan(s) shall be heavy-duty, axial flow
design. Fan(s) shall be driven through
an industrial grade system of V-belts,
pulleys, and tapered roller bearings.
Bearings shall be rated at an L10 life of
40,000 hours, or greater.
7.2
Motor(s) shall be ____ hp maximum,
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,
60 hertz, ____ volts.
7.3
The fan and fan drive assembly for
each cell shall be supported by a rigid,
galvanized steel structural support that
resists misalignment. The mechanical
equipment assembly shall be war-
ranted against any failure caused by
defects in materials and workmanship
for no less than five (5) years following
the date of tower shipment. This war-
ranty is limited to the fan, fan shaft,
bearings, sheaves and mechanical
equipment support. The motor, motor
components, pumps and belt(s) are
warranted by their manufacturer.
Q
Propeller-type fans require
only half the operating hp
of blower-type fans. The
Marley drive system fea-
tures all-aluminum sheaves,
matched belts, and long-life
bearings for dependable
service.
To reduce cost, some manufacturers may use TEAO motors,
whose only source of cooling is the flow of air produced by the
cooling tower fan. They are sometimes applied at horsepowers
significantly beyond their nameplate rating.
Unless otherwise specified, motor speed will be 1800 RPM, 60
Hertz on standard models. If you prefer the operating flexibility
of two-speed operation, please specify two-speed, single-wind-
ing 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.
MULTICHILL Refrigeration Products
SPX Cooling Technologies - Marley Cooling Towers
Cooke Industries - Phone: +64-9-579 2185 Fax: +64-9-579 2181 Email: [email protected] Web: www.cookeindustries.co.nz
