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	AIR CONDITIONERS This system is recommended when great quantities of heat need being dissipated while ambient temperatures are rather high . The conditioners have an operation limit determined by the outside temperature ranging from +55°C to +20°C. It should also be considered that this kind of cooling equipment needs to be properly used and regularly maintained, cleaning the air filter (if any) and the condensing battery. When buying new equipment, we suggest buying a set of spare filters: using common filters from the trade is not advisable as the filtering cloth is too fine and dramatically limits the airflow. VENTILATION SYSTEM Filters and fans can be used when the outside temperature is lower than the Panel inside one. Minimum maintenance is required, consisting of a periodical filter cleaning and replacement, if the need be. To maximize results, we suggest creating air flows as free as possible from obstacles, and flowing through the whole Panel from the bottom upwards, as hot air tends to rise. ANTICONDENSATE HEATERS They are used to solve the problem of condensate forming due to the very low temperatures reached when the equipment is stopped. The heaters keep the inside temperature within safety limits, so avoiding the problem mentioned above.
CALCULATION OF HEAT EXCHANGE Calculating the heat load to be removed represent the essential step when choosing the cooling system, and four factors should be considered: the heat dissipated by the equipment inside the panel, the temperature in the room where the panel is installed, the temperature one wish to keep inside the panel, control board sizes and set-up conditions. As far as the quantity of heat produced by the inner components is concerned, the data shown on the technical sheets of the components themselves must be checked and evaluated. No need saying that while making this calculation the possibility of various units working simultaneously should be taken into consideration. Also, as already mentioned, the temperature of the room where the electric cabinet is installed must be carefully evaluated. In fact, an exchange takes place between the panel surfaces and the environment. If the outside temperature is lower than the inner one, heat is transferred from inside to outside, and must be subtracted from the heating load produced by the components; if, on the contrary, the outside temperature is higher than the inside one, the opposite will occur, hence the heat absorbed shall be summed to the heat dissipated by the equipment. In s/s surfaces, 5.5 W/m2K are transmitted per each square meter of cabinet surface. The calculation of the over temperature inside the cabinet must meet CEI 17/43 standard, according to the cabinet operating conditions. The relevant calculation sheet in Microsoft® Excel format is available for easier calculation of the thermal exchange in compliance with the above mentioned standard.
The method of a rough calculation
	AIR-COOLED CONDITIONERS This cooling system is particularly recommended when the temperature inside the Panel has to be maintained equal to or lower than the temperature outside it. To maximize its reliability, the conditioner should be carefully sized, to get a model big enough to keep the temperature within acceptable limits even in the worst conditions, while avoiding over-sizing. The ambient temperature must therefore be related to the Panel inside temperature, to obtain the so-called meter factor, i.e. the data necessary to determine the conditioner rated yield.
Air-cooled conditioners
	CONDITIONERS FOR ROOF-MOUNTING - SERIES KT STANDARD FEATURES AND OUTFIT • Roof- mounting (outside) • Suitable for cabinets W. min. 800 D min 500 • Thermostat for inside control, preset at 35°C • Terminal board for inside connection • Anti-freeze thermostat • Casing made of s/s EN 1.4301 - X5 Cr Ni 18/10 (AISI 304) fine satin-finished and protected • Polyurethane air filter • Hoisting eyebolts • Compressor start timer (for models KT30.5 e KT40.5) • Compressor contactor (for models KT30.5 e KT40.5) • Seal IP54 between conditioner and control panels according to standard CEI EN 60529 (CEI 70/1) • Meet CE standards • Use and maintenance manual in 5 languages
Conditioners for roof-mounting
	PELTIER-EFFECT THERMAL MODULES SERIES KP The thermoelectric technology applied to the air conditioning units for electric/electronic panels in industrial-grade applications is based on the principle of the Peltier-effect heat pump. Unlike the conventional compressor-based cooling/conditioning systems, the Peltier effect is electronic with no use of gas like the CFC or others. The main advantages of the thermoelectric system compared to the traditional compressorbased ones are the following: · Reliability: they are electronic-based, have no mechanical moving parts, hence are no subject to wear or charge exhaustion · Limited size and weight: ideal where weight and overall dimensions of the refrigerating dissipating system are determinant for the good working of the finished system. · High protection degree: the thermoelectric system allows a protection degree IP55 to be achieved for the devices inside the board. · Versatility: the thermoelectric units delivered by our company are pre-arranged for the conditioning/heating function, both in automatic (adding a thermostat) and manual mode (adding a push botton) · Easy installation: recessed mounting, 24 Volt D.C. power supply allow the immediate installation in electric/electronic Panels, even small-sized.
Data sheet
	FILTERS AND VENTILATORS Cooling system recommended when the outside temperature is lower than the inside one. Proper ventilator sizing requires the heat power to be dissipated to be known (see sheet THERMAL CALCULATION), as well as the gap between the inside and outside temperature, while the value of ventilator minimum air rate of flow will be derived from the chart. A grid with ventilator must always be matched with a grid without ventilator, placing the ventilator at the bottom and the grid on top of the opposite side. The grids, all louver type, are available both in the ABS self-extinguishing version and in s/s, while the inner body, is always in ABS. When minimum overall dimensions are a must, and high protection degree is not required, an extra-flat grid is available, with and without ventilator. This cooling system offers several advantages: easy installation (drilling the cabinet according to the template supplied is everything you need to do), limited maintenance and cost rather lower than the other refrigerating systems. Troubles and damages can be avoided by: • Making sure the outside temperature is always lower than the inside one • Cleaning the filters regularly, and replacing them, if the need be (the operation can be done even while the ventilator is running) • Chose a ventilator slightly oversized compared to the theoretical calculations: a flow higher than required will cause no damage while it provides a certain safety margin. On request, grids and ventilators can be supplied pre-assembled on control panels.
Data sheet
	VENTILATION UNITS SERIES KC STANDARD FEATURES AND OUTFIT • Protection degree IP44,54 o 55 • Axial ventilators with conveyor, grid and filter, operating on the inflow side. • Motor set on ball bearings, with 30,0000-hour non-stop running. • Grid inner body made of ABS plastics, self-extinguishing according to UL –94VO code, standing a temperature range from -20°C to +50°C, colour RAL7032 • Outside louver type grids for condensate drainage, if the need be, available both in AISI 304 s/s, fine satin-finished and protected, and in ABS plastic material, self-extinguishing according to UL –94VO, standing a temperature range from -20°C to +50°C, colour RAL 7032. • Filters: they keep powders with granulometry up to 10 micron • The product meets CEI 17-13/1 (IEC439-1), CEI 61-28 (IEC342-1) standards.
Data sheet
	AREATION UNITS STANDARD FEATURES AND OUTFIT • Protection degree IP44,54 o 55 • Grid inner body made of ABS plastics, self-extinguishing according to UL –94VO code, standing a temperature range from -20°C to +50°C, colour RAL7032 • Outside louver type grids for condensate drainage, if the need be, available both in AISI 304 s/s, fine satin-finished and protected, and in ABS plastic material, self-extinguishing according to UL –94VO, standing a temperature range from -20°C to +50°C, colour RAL 7032. • Filters: they keep powders with granulometry up to 10 micron.
Data sheet
	STAINLESS STEEL LABYRINTH CASING SERIES KL EN 1.4301 (AISI 304) S/S casing, with upward air inflow, for application on grids: they will assuring improved splash protection.
Data sheet
	VENTILATING UNITS FOR ROOF - KR20 For use when ventilating the cabinet through the roof is practical and convenient. It works on suction. Easy to apply, its minimum dimensions allow housing it entirely inside the roof ventilation hoods, except for the filter pack. The outside guard is made of EN 1-4301 s/s (AISI 304), finely satin-finished and protected. The fan is axial-centrifugal, single-phase, set on ball bearings in compliance with the basic requirements of Directive 89/392/CE on machinery, and European Standards UNI EN 292 part I, II, UNI EN 294 and CEI 44-5 and 6 (IEC 204-1 and 2). Motor protection degree is IP45 or IP55 (it depends on the filter used), designed for high performances at low noise level.
Data sheet
	ANTICONDENSATE HEATERS SERIES KM Used to prevent condensate forming on control panels, and when the inner temperature has to be kept higher than the outside one. Two series are available, to cope with the above problem in panel of different sizes: • The KMD series includes three models of little and average sizes and capacities, suiting Panel of average dimensions; • The KMX series, formed by two models with ventilating action and high thermal power, suiting average and big-sized panels. To choose the right heater you should know the power dissipated by the cabinet
Data sheet