CF-GAS Autonomous gas fired single package air treatment unit ROOF TOP

The unit consists mainly of an isolated cabinet receiving the air flow generated by the ventilator group and where a top-efficiency condensation heat exchanger is installed, thereby providing for heating effect modulation. In the heating phase, the heat exchanger transfers heat energy through direct exchange between flue gas and the air flow to be heated. Namely, the air flow passes onto the heat exchanger’s hot surface and is thereby warmed up to be later supplied to the environment. Also cooling is performed without any intermediate fluid, through the so-called technique of “mechanical compression and direct expansion” of the refrigerating gas – something which can be achieved thanks to two separate refrigerating circuits working independently. The centrifugal fan’s characteristics make this equipment suitable to be installed wherever very high static pressure is required. The unit can perform air mixture, renovation, filtering and discharge, as well as just room ventilation during summertime.

The direct exchange technology employed by this equipment requires lower installation costs but first and foremost allows a tangible reduction of operating cost. As a matter of fact, the most important feature of this system is that heat is directly transferred to the premises to be heated, thereby avoiding inefficient transformation stages. The result is a much higher overall performance of the whole system.

The CF-GAS unit is manufactured with valuable stainless steel materials that allow coupling with burners working at variable heating power mode (both modulating and/or two-phase). It guarantees a safe, long-lasting functioning also at flue gas condensation conditions. This peculiar feature allows to monitor in a continuous and consistent way the equipment’s heating capacity output. Moreover, operating economy is maximized thanks to the functioning mode at condensation conditions. The aforementioned characteristics make this equipment also suitable to fully treat outside air intake for air renovation purposes, whose temperature changes from time to time according to the season.

The refined watertight cabinet is protuberance-free and its thermal well-insulated panels can be washed inside. These features perfectly allow to install the equipment outside with no additional protection needed, even under extreme climatic conditions reaching down to -45°C (provided it is fitted with a specific kit). All functions are managed in a fully automatic way by means of a complete electronic controller on the equipment’s side that can be interfaced with a user-friendly remote control device or yet even more complex appliances. A wide choice of accessories (such as regulation dampers, customized power capacity, remote controls, kit for high static pressure, etc.) come in to complete the product. Product safety is certified by renowned and professional International Authorities.

• Cooling section with hermetic SCROLL compressors placed in a dedicated compartment, working with eco-friendly R407C gas, independent cooling circuits, complete with finned coil heat exchanger of large front surface with subcooling circuit, axial fan.
• Gas heating section with patented high efficiency heat exchanger made of stainless steel, centrifugal fan for forced flue gas extraction, atmospheric burners running with gas, electronic ignition, flame control by ionization and safety thermostats.
• Treatment section consisting of an outdoor/recirculation air mixing chamber, removable filter of G4 class and evaporation coils, condensate tray, double inlet centrifugal fan for air supply with low sound emission, variable belt/pulley trasmission, 400V/3ph+N/50 Hz electric motor mounted on appropriate belt tightner support.
• External casing painted with thermosetting powders, large thick support frame made of painted galvanized steel.
• Electric and electronic board for the control, protection and operational functions of the unit.
• Remote electronic control panel to regulate automatically the stage capacity (CF-GAS 100: N.1 stage in cooling and N.2 stages in heating; all other models: 2 stages in cooling and N.3 stage in heating) with daily-weekly operation programming. This equipment can handle all unit function: differential set-point, partialization, compensation, display alarms (high and low pressure cooling circuit, thermal relay supply fan...) and their reset.

• CF-GAS 100 ÷ 550
• CF-GAS 600 ÷ 700
• M-CF UNITS 100÷500 dimension
• M-CF UNITS 600÷700 dimension

CF-GAS

High static pressure version: the high static pressure variant consists in modifying the fan section (fan motor, transmission and for some models the fan itself) and the electrical board to ensure the maximum static pressure of 450 Pa.

Low temperature version (from -15°C to -25°C): for outside installation with temperature from -15°C to -25°C with air intake directly from the room or mixing the air intake from the room with max 30% of fresh air. The low temperature version consists of: increased thermal insulation of the unit, electrical motors with windings thermally protected from frost and an electrical heater with thermostat placed inside the burner protection box, which prevents to reach critical combustion air temperatures and which allows to keep the temperature of all electrical and electronic equipment controlled.

Low temperature version (from -25°C to -40°C): for outside installation with temperature from -25°C to -40°C with air intake directly from the room or mixing the air intake from the room with max 30% of fresh air. The low temperature version consists of: increased thermal insulation of the unit, electrical motors with windings thermally protected from frost and fan bearings suitable for operation up to -40°C and an electrical heater with thermostat placed inside the burner protection box, which prevents to reach critical combustion air temperatures and which allows to keep the temperature of all electrical and electronic equipment controlled.