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 built with Magnelis® (steel, zinc, aluminium, magnesium) ZM310 type sheet metal panels to ensure maximum surface protection empirically comparable to a galvanized sheet metal with over 1000 g/m2 of zinc. The individual panels, following the cutting and folding phase, are assembled with AISI 304 (A2-70) or on request AISI 316 (A4-80) stainless steel small parts and highly adhesive butyl mastic gasket reinforced with polyester mesh inside to guarantee great shape stability and resistance to temperature variations. No welding is required in the various stages of assembly of the structure (self-supporting). The color of the sheet metal type Magnelis® is RAL 9006.

WATER COLLECTION BASIN

The basin section is built with thick Magnelis® ZM310 sheet metal paneling and is equipped with removable anti-cavitation filter in AISI 304L (to protect the secondary circuit pump) and water make-up valve with brass/stainless steel body and stainless steel or polypropylene floating ball. All machine connections are made of galvanized steel (AISI 304L on request). The water recirculation pump is housed outside the basin structure, with a cast iron body and IP54 motor protection rating.

THERMAL EXCHANGE COIL

The standard heat exchange coil is made of smooth (optionally finned) carbon steel tubes (AISI 304L on request) of suitable diameter and thickness and bent following our proprietary geometry. Everything is hot-dipped galvanized in accordance with the UNI EN ISO 1461:2009 standard to guarantee perfect resistance to corrosion. Subsequently the coil is tested in compliance with the PED-CE regulation.
The machines are supplied with the coil pre-charged with nitrogen at a pressure of 3 bar.

WATER DISTRIBUTION SYSTEM

The water is uniformly distributed by a piping system inside the machine made of PVC with a Magnelis® sheet metal distribution box >. The spray nozzles are of the non-clogging type, of medium and large diameter, in ABS and easily replaceable in case of maintenance.
The pipes that connect the recirculation pump with the internal ramp are made of PVC, easily removable for possible cleaning of the circuit, in accordance with the latest health provisions (anti-legionella).

VENTILATION SYSTEM

(MOTORS + FANS)

The fan unit is placed in the basin section, housed on a sturdy galvanized steel structure fixed to the frame which supports the entire unit. The axial fan is made with high efficiency glass fiber reinforced polypropylene (PPG) blades, aluminum hub, galvanized steel bush and bolts. The fan protection net will be made of galvanized steel. The motor, efficiency class IE3, with tropicalized IP56 mechanical protection, insulation class F, continuous duty S1, form B3 and automatic condensate drain, is keyed directly to the axial fan (direct coupling).
The motors are suitable for being coupled to frequency variators (VSD-Inverters) 30-50Hz.
The engines comply with CE 2019/1781 regulation.
The electrical connection terminals and the connection of any optional extras (anti-condensation heater and PTC thermistor) are enclosed inside the terminal box of the electric motor.

DROP SEPARATOR

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, is subjected to hydraulic testing, to ensure that there are no water leaks in the tank, and electrical to check that the electric motors have an absorption in line with the plate data.