CONSTRUCTION FEATURES

The RAP type machines, evaporative coolers with pressure axial fans, are built and assembled in accordance with our ISO 9001 certified quality system.

STRUCTURE & ASSEMBLY

The standard unit is constructed of sheet metal panels type Magnelis® (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 single panels, after the phase of cutting and folding, are assembled with AISI 304 (A2-70) on request AISI 316 (A4-80) e guarnizione in butyl mastic highly adhesive reinforced with polyester mesh inside to guarantee great shape stability and resistance to temperature variations. During the assembling of the structure, welding operations are not foreseen (self-supporting). The coloring of the sheet metal type Magnelis® is a RAL 9006.

WATER BASIN

Basin section is made with thick panels of Magnelis® ZM310 thick and is equipped with a removable anti-cavitation type filter AISI 304L (a protezione della pompa del circuito secondario) e valvola di reintegro acqua con corpo in ottone/acciaio inossidabile e sfera galleggiante acciaio inox o polipropilene. All the unit connections are in galvanized steel (AISI 304L on request). Water pump is made in cast iron, with a motor protection degree of IP 54, and placed outside basin structure.

HEAT EXCHANGE COIL

Standard heat exchange coil is made of smooth carbon steel (AISI 304L on request) tubes (finned on request) of suitable diameter and thickness, following our proprietary design. Coil is hot-dip galvanized according to UNI EN ISO 1461:2009 to ensure a perfect corrosion protection. After that, coil is tested in accordance to PED-CE rule.
Coil is delivered filled with nitrogen at a pressure of 3 bar.

WATER DISTRIBUTION SYSTEM

Water is evenly distributed by a piping system inside the machine made of PVC with sheet metal distribution box Magnelis®. Spray nozzles are of suitable diameter to prevent any clogging and are made in ABS and easily replaceable in case of maintenance.
Pipes connecting water pump to internal distribution pipework are made in PVC, easily removable during circuit cleaning, as for the most recent sanitary rules (anti- legionella).

VENTILATION SYSTEM

(MOTORS + FANS)

The ventilating unit is located in the basin section, housed on a galvanized steel structure fixed to the frame that supports the entire unit. Axial fans are built with blades in high efficiency glass fiber reinforced polypropylene (PPG), hub in aluminum, compass and bolts in galvanized steel. Protection fans grids are made in galvanized steel. Motors, IE3 efficiency class, with mechanical protection IP56 tropicalized, F insulation class, continue service S1, B3 form and automatic condensate drain are directly spliced to axial fans (direct coupling).
Motors are suitable to use together with frequency inverter (VSD-Inverter) 30-50 Hz.
Electric motors are in accordance with CE 2019/1781 norm.
The terminals for power connection and the connection of any extras optional (anti-condensation heater and ptc thermistor) are inside the terminal box of the electric motor.

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, prior to delivery, undergoes hydraulic testing to ensure that there are no water leaks in the tank, and electrical testing to verify that the electric motors have a power draw in line with the nameplate data.