FAN HEATERS LEO EX

Product catalog summary

General Characteristics
LEO EX fan heaters are designed for use in explosion-risk zones, suitable for environments with gases, liquids, and fumes from IIA and IIB groups. They are ideal for heavy industry halls and welding plants. The heaters have a heating capacity ranging from 1.3 to 57.3 kW and an air flow rate of 1000 to 4000 m³/h. The casing is made of powder-painted steel in grey color (RAL7035).

Construction
The fan heaters can be mounted on walls or ceilings using dedicated brackets. They feature air louvres for directing airflow and a specially shaped nozzle for reduced air flow resistance, resulting in quieter operation. The fans are ATEX certified for use in hazardous areas.

Technical Data
LEO EX heaters operate on a 3x400V/50Hz power supply with a maximum current consumption of 0.51 A and power consumption of 290 W. They have an IP44 insulation class and a maximum acoustic pressure level of 59.5 dB(A). The maximum heating water temperature is 130°C, with an operating pressure of 1.6 MPa.

Ranges
The heaters provide both horizontal isothermal and vertical non-isothermal air streams. The horizontal range can reach up to 21 meters, while the vertical range can extend up to 7.4 meters.

Installation and Mounting
Installation options include wall and ceiling mounting, with specific guidelines for maintaining minimum distances to ensure proper air stream range.

Regulation
Two automation systems are available: EX LITE and EX PLUS, both featuring start-stop rotary switches, motor protection, and optional autotransformer regulators. The systems are designed to be explosion-proof, matching the fan's protection level.

Connection Diagrams
Connection diagrams specify the power supply requirements and wiring configurations for safe and efficient operation.

Heating Capacities
The document provides detailed tables of heating capacities at various air flow rates and water temperatures, allowing for precise selection based on specific requirements.

Catalog excerpts

GENERAL CHARACTERISTICS Fan heaters LEO EX Heating capacity [kW](1) Air flow [m³/h](2) Weight [kg] Casing Colour range of heating power specified with the parameters: min. - 1st speed of the fan, heating medium temperature 40 / 30oC, air temperature at the inlet to the device 20oC; max. - V gear of the fan, heating medium temperature 120 / 90oC, air temperature at the inlet to the device 0oC (2) capacity control using the TR 3x400 5-speed speed controller (1) APPLICATION Fan heaters equipped with anti-explosion fan and may be installed in Z-2 explosion-risk zones, in rooms at risk of explosion...

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CONSTRUCTION FAN LEO EX devices are equipped with an ATEX certified fan, which enables operation in hazardous areas requiring explosion proof fans. NOZZLE The fan is placed in a specially shaped nozzle, with reduced air flow resistance, which results in quieter operation of the device. AIR LOUVRES When installing the heater horizontally under the ceiling, it is possible to direct the air in two directions to spread the warm air over a larger area. INSTALLATION Dedicated mounting brackets enable both wall and ceiling mounting.

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LEO EX For CAD drawings, Revit files and documentation for all avaliable versions of ELiS visit www.flowair.com TECHNICAL DATA Fan heater LEO EX Nominal heat power (70/50/16oC) [kW] IP/Insulation class Max. acoustic pressure level [dB(A)] Max. acoustic power level [dB(A)](4) Horizontal isothermal range [m] Vertical non-isothermal range [m](6) Max. heating water temperature [ C] Weight of unit filled with water [kg] efficiency control using the TR 3x400 5-speed controller range of heat powers specified at the parameters: min. - I fan speed, heating medium temperature 40 / 30oC, air temperature...

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Vertical range of non-isothermal stream at velocity boundary equal to 0,5 m/s. RANGES HORIZONTAL RANGE OF AIR STREAM – isothermal Horizontal range of isothermal stream at velocity boundary equal to 0,5 m/s. VERTICAL RANGE OF AIR STREAM – non-isothermal

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INSTALLATION AND VARIOUS MOUNTING POSSIBILITIES installation under the ceiling wall mounted When device is mounted under the ceiling please note the proper non-isothermal air stream range. EX brackets Brackets enable easy and quick installation Of ceiling or wall mounted devices.

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REGULATION The control is selected individually depending on the degree of explosion hazard in a given facility. The controls shall also be explosion-proof, with a degree of protection at least the same as that of the fan. Fan motor needs special external protection systems, e.g. U-EK 230E or similar. There are 2 versions of automation systems: EX LITE and EX PLUS. START- STOP rotary switch phase asymmetry, sequence, failure protection overcurrent and short - circuit motor protection thermistor motor protection relay (ATEX) optional autotransformer regulator remote start signal via potencial...

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V – air flow PT – heating capacity Tp1 – inlet air temperature Tp2 – outlet air temperature Tw1 – inlet water temperature Tw2 – outlet water temperature Qw – water flow rate in heat exchanger Δpw – water pressure drop in heat exchanger HEAT OUTPUT CALCULATOR In order to select the device with other parameters

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