VENTILATION
Fan Section EC Inverter Plug-Fan
The fan section is equipped with EC Inverter Plug-Fan.
• The EC Inverter Plug-Fans are managed by an electronic control adjusting fans rotational speed to adapt air flow and static pressure to the system capacity. They supply a variable air flow according to the requested thermal load, providing important benefits in terms of energy consumption and low noise operation especially when the unit is operating at partial load.
• The EC Inverter Plug-Fans can be set to different working conditions, according to the unit needs, directly on site through the control panel installed on the Electrical Board section.
• Compared to traditional Plug-Fans, thanks to EC Inverter technology the overall efficiency and acoustic behaviour of the fans has been significantly improved. The blade geometry with a diagonal trailing edge has positive effects on the aerodynamic performance and on the running smoothness of the fans. The same is true for the implemented nozzle contour.
• The overall dimension of the section can be kept at minimum thanks to the fan dimension: the EC motor is integrated directly in the impeller. A belt drive between the motor and the fan, which is commonly used otherwise, is not necessary. This reduces the required installation volume and the associated installation effort.
• The EC Plug-Fans significantly exceed the ErP 2015 norm and the requirements of energy efficiency class A+ stated in German manufacturer’s association RLT Directive 01, “General Requirements for Ventilation and Air-conditioning Devices”.
• AHU fan section equipped with EC Inverter Plug-Fans is provided with the Automatic Regulation Control Systems for Constant Air Flow and Constant Available Static Pressure. An electronic device with pressure sensors on the system and control sensors on EC Plug-Fans adjust the flow rate and the available static pressure to keep the air flow constant.
Humidifier
Electrode humidifiers specifically designed for installation inside air handling units.
• The humidifier is constituted by two parts connected together electrically: the hydraulic part and the control unit based on a microprocessor board. The hydraulic part is completely inserted into the AHU, lying on the condensate drain tank immediately downstream of the cooling coil.
• The control is fully integrated in the microprocessor installed aboard the AHU.
• The hydraulic boiler is made up of plastic polypropylene “channel” having a section of 33 cm x 16 cm height, and having a length proportional to the width of the AHU. Inside the boiler are arranged longitudinally the stainless steel electrodes, connected to the power supply phases and easily removable The lid is made of plastic sections with slope, so as to allow any condensation that falls by gravity into the boiler in order to avoid power losses.
• Between the plastic sections is obtained a narrow longitudinal slot which allows the output of the steam produced, that meets the air for the whole length of the AHU section.
• This solution prevents the formation of condensate in the pipes and also prevents any increase in steam pressure in the boiler due to blockages in the pipes conveying steam.
On one side of the kettle (the easiest to access once installed) you have the body of hydraulic management of the system
• Maximum water level sensor
• Draining bloc the draining bloc has been specially designed to empty the tank from water and limestone pieces without having to block and having to be able to work without pressure.
A electronic rotation sensor, rigidly grafted on the pivot motor, communicating with the microprocessor which manage the correct operation and shown in the display any faults that may appear.
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