FILL:
Heat transfer fill media shall be crosscorrugated
20 mil PVC sheets supported by stainless steel tubes
which, in turn, are suspended by stainless steel tension
hangers from concrete support beam members.
DRIFT ELIMINATORS:
Drift eliminators shall be
supplied in a 3 pass cellular arrangement of bonded
17 mil PVC sheets. Drift loss shall not exceed ______%
of circulating water.
HOT WATER DISTRIBUTION SYSTEM:
Hot water
distribution system in each cell shall be supplied with
a single interior inlet terminating 1'-0 below bottom of
the tower filling. Materials will be of inert PVC and RTR
and polypropylene piping supported by the support
beams utilized to carry heat transfer fill media.
FAN CYLINDERS:
Fan cylinders shall have eased inlet
design and be of molded fiber reinforced polyester
with a minimum height of 6' 0.
OPTlONS:
Factory Mutual Approval. The tower
shall include all design and material modifications
necessary to meet the fire rating requirements of
Factory Mutual. The product proposed shall be listed
in the FM Approval Guide, latest edition.
Masonry structure options at owner’s election:
1-Shell structure design shall be by cooling tower
manufacturer.
2-Shell structure and cold water basin design shall be
by cooling tower manufacturer.
3-Shell structure and cold water basin design shall
be by cooling tower manufacturer. Shell structure
construction including materials and labor shall be
by cooling tower manufacturer.
4-Shell structure and cold water basin design shall be
by cooling tower manufacturer. Shell structure and
cold water basin construction including materials and
labor shall be by cooling tower manufacturer.
WARRANTY:
Warranty on all components against
defective materials and workmanship will be
extended for a period of one (1) year following initial
operation but not exceeding eighteen (18) months
from date of shipment. Components that may fail
within warranty period shall be repaired and/or
replaced including freight and installation labor.
Thermal testing of cooling tower will be done
within one (1) year following structural completion
in accordance with Cooling Technology Institute
Acceptance Test Code CTI ATC 105. In the event test
results indicate deficiency, manufacturer shall make
alterations to overcome indicated deficiency and if
such alterations are inadequate manufacturer shall
refund a percentage of contract price proportional to
tower deficiency.
SPECIFICATIONS
COOLING TOWER:
Furnish and install (1) Induced
Draft Counterflow Cooling Tower. Cooling tower
shall be______ft. long x ______ft. wide x ______ ft.
overall height with a maximum operating weight
of______lbs. Cooling tower shall consist of_____fan
cells with a maximum of_____total fan horsepower
and a maximum pump head of______ft.
Other contractor(s) will furnish all external piping,
valves, pumps, electrical equipment other than
cooling tower fan motors, wiring, controls, etc. all in
accordance with general overall dimensions to be
supplied by cooling tower manufacturer. All internal
components of cooling tower as described following
will be furnished and installed by the cooling tower
manufacturer.
CAPACITY:
Cooling tower shall be selected and
guaranteed to cool______GPM of water from
______°F to ______°F at ______°F entering wet bulb
temperature.
MECHANICAL EQUIPMENT:
Mechanical equipment
shall be designed specifically for cooling tower usage
and shall be mounted on a rigid unitized HDG steel
support to assure permanent drivetrain alignment.
Cooling tower manufacturer shall be responsible for
equipment warranty.
FANS:
Fans shall be of a multi-blade propeller
type and blades shall be constructed of solid glass
reinforced polyester, cast aluminum alloy or hollow
glass reinforced epoxy. Hubs shall be HDG steel cast
iron or aluminum plate. Blades shall be individually
adjustable for required pitch angles.
DRIVESHAFTS:
Driveshaft tubes and flanges shall be
manufactured of type 304 stainless steel. Couplings
shall be hot dip galvanized cast iron, joined to
the driveshaft by flexible neoprene bushings and
cadmium plated steel inserts. Connecting hardware
shall be 300 stainless steel. Driveshaft assemblies shall
be dynamically balanced at the factory at full motor
speed.
SPEED REDUCERS:
Speed reducers shall be provided
for right angle fan drive and shall be designed to
AGMA standards for continuous duty operation,
capable of reverse operation. Oil fill and drain lines
are to be extended outside the fan cylinder to an oil
level sight glass.
ELECTRIC MOTORS:
Electric motors shall be_______
speed, single winding, variable torque, _____ hp
maximum, TEFC, and specially insulated for cooling
tower duty. Speed and electrical characteristics shall
be _____ RPM, _____ phase, _____ hertz, _____ volts.
If the load applied to the motor exceeds 90% of the
nameplate rating, then the motor shall have a 1.15
service factor and the service factor beyond 1.0 shall
not be considered available for load.