SPX Cooling Technologies Recold JT Series - Manual (Page 2)

Recold / JT Series Cooling Tower / Construction
2
Recold, the pioneer of Dri-Fan forced draft evaporative coolers, now applies this principal to the cooling of process water.
With the fan in the supply air stream, away from the high humidity air leaving the tower, the fan shaft and bearing are
assured longer life.
SYSTEM
The process water enters the spray tree at the top of the
unit, is sprayed down onto the heat exchanger surface
or “fill”, giving up heat to the counterflowing air before
returning to the system from the sump pan. Moist air does
not enter the fan assembly, resulting in longer life and
fewer service problems.
HYDROSPRAY NOZZLES
Hydrospray nozzles are made of non-ferrous material,
sized and spaced for optimum wetting of fill. The even
distribution of spray across the fill material is extremely
important in evaporative equipment.
ACCESSIBILITY
Recold cooling towers are designed for maximum
accessibility for inspection and cleaning. Recold patented
access doors on both sides of the unit provide ample
access to the spray nozzles, fill, eliminators, bleeds and
sump pan for service and maintenance. Recold access
doors provide a complete air and water tight seal without
gaskets or fasteners, and are “quick opening.”
CONSTRUCTION
Recold cooling towers are constructed of 300 series
stainless steel (basin, fill supports and access doors) and
heavy gauge hot dipped G-235 galvanized steel per ASTM
A-525.
BLOWERS
A single, slow-speed forward curve blower is used for
optimum efficiency and minimum noise. Each blower
is balanced to eliminate unit vibration on Recold’s high
precision electronic balancing equipment. Large blowers
are made from galvanized steel and subject to careful
quality control throughout. Fan shafts are coated to prevent
corrosion. The blower drives are selected at 150% of rated
brake horsepower.
Bearings are self-aligning, ball-bearing type, with external
lubricating fittings and selected for 2000,000 hour average
bearing life. Rugged, OSHA approved, belt guard and
screen are provided for protection. Motor is mounted on an
adjustable base.
INTEGRATED ASSEMBLY
Recold cooling towers are completely assembled at the
factory and shipped as a unit.
FILL
High efficiency is accomplished by using a PVC fill design
that provides the maximum amount of wetted surface
within allowable airside pressure drop. Fill is conveniently
sized for easy removal. The cooling tower fill shall be high
efficiency, self-extinguishing PVC, a minimum of 40 mils
thick. It shall have a flame spread rating of 25 per ASTM
standard E-84 and be impervious to rot, decay, fungus or
biological attack.
DRIFT ELIMINATORS
Eliminators are constructed of PVC assembled in
removable, easy to handle sections. A three-pass design
allows three changes in air flow resulting in decreased drift
rates. The use of durable PVC eliminates the corrosion
problems associated with galvanized eliminators.
TESTING
All Recold cooling towers are tested under the close
supervision of the Quality Control Department before being
released for shipment. Fans are run and spray systems
operated to assure quiet, balanced operation without leaks,
water carryover or vibration. Nozzles are checked for proper
distribution.
Use this data for preliminary layouts only. Obtain
current drawing from your Marley/Recold sales
representative.
The UPDATE web-based selection software—available
at spxcooling.com—provides JT Series model
recommendations based on customer's specific design
requirements.