TAA

CONSTRUCTION FEATURES

TAA-type machines, open-circuit evaporative towers with axial fans, are built and assembled in accordance with our ISO 9001-certified quality system.

MAGNELIS

All our machines as standard are built in Magnelis, an eco-sustainable alloy made up of 93.5% zinc, 3.5% aluminum and 3% magnesium. The percentage of magnesium allows the self-repair process during cutting and punching operations and protect against deformations. Another characteristic of this material is resistance to corrosion, superior even in environments rich in chloride and ammonia. The maximum workability and greater resistance, compared to other processes, allows the use of a smaller amount of metal coating and therefore a greater lightness of the machines.

STRUCTURE & ASSEMBLY

Standard unit is built with alloy steel Magnelis® ZM310 (steel, zinc, aluminum, magnesium) panels to grant the maximum level of surface protection. Comparable empirically to a galvanized sheet with over 1000 g/m2 of zinc. The individual panels, following the cutting and bending stage, are assembled with AISI 304 (A2-70) or upon request AISI 316 (A4-80) stainless steel hardware and highly adhesive butyl mastic gasket reinforced with polyester mesh on the inside to ensure great stability of shape and resistance to temperature variations. During the assembling of the structure, welding operations are not foreseen (self-supporting). Magnelis® sheet metal color is RAL 9006.

LOUVERS

Louvers are in PVC with special dual flow design in order to eliminate the sun light into the water basin, possible residue/leafage or accidental water leakage. Positioned on the four sides of the unit, louvers can be completely removed to allow an easy access to the basin during maintenance.

WATER BASIN

The basin section is constructed with a thick Magnelis® ZM310 sheet metal structure and is equipped with removable AISI 304L anti-cavitation type filter (protecting the primary circuit pump) and water make-up valve with brass/stainless steel body and stainless steel or polypropylene floating ball. Basin configuration permits water volume reduction and a lower weight when operating. Basin surface is sloping to permit complete drainage, emptying during maintenance and preventing then the growth of bacteria. All the unit connections are in galvanized steel (AISI 304L on request).

FILLING

The fill or exchange pack is made of PVC(PP upon request) with proprietary geometry design. The filling standard is type W1300 and on request, depending on the characteristics of the water to be used it can be type W2000 or for particularly dirty water filling W2700 is available. The geometry used is such that the heat exchange surfaces between air and water are maximized.

WATER DISTRIBUTION SYSTEM

Water is uniformly distributed on the coil by pipes made in PVC and distribution system made in Magnelis®. Spray nozzles are of suitable diameter to prevent any clogging and are made in ABS and easily replaceable in case of maintenance.

VENTILATION SYSTEM

(MOTORS + FANS)

Axial fans are built with blades in high efficiency glass fiber reinforced polypropylene (PPG), aluminum hub, compass and bolts in galvanized steel. Protection fans grids are made in galvanized steel. The motors, efficiency class IE3, with tropicalized IP56 mechanical protection, specially designed for operation in humid atmosphere, insulation class F, continuous duty S1, form V6 and automatic condensate drain, are keyed directly to the axial fans (direct coupling).
The electric motors undergo a class C5 painting cycle to ensure maximum protection against corrosion and moisture. Motors are suitable to use together with frequency inverter (VSD-Inverter) 30-50 Hz.
The motors are in accordance with CE 2019/1781.
The connecting cable coming out directly from the electric motor housing is carried outside the structure and wired directly to the terminals in special IP56 junction box.

DRIFT ELIMINATORS

Drift eliminators are made in PVC (PP on request) and divided in various sections to facilitate their removal in case of replacement or inspection of ventilation and water distribution system. The used drift eliminators allow a passage of drops equal to 0.001% of the droplets present at the entrance, removing water loss, potential aerosols drift that might contain Legionella bacteria.

TEST

All components are supplied assembled. Each unit, before
delivery, undergoes hydraulic testing to
make sure there are no water leaks in the tank, and
electrical testing to verify that the electric motors have
absorption in line with nameplate data.