PACKAGED ROOFTOP UNITS 50EN/EH 415-1200
Energy saving / recovery options
Compressors in tandem - This setting improves the management of stages, and therefore the energy efficiency of the unit (models 415 to 600). Models 650 and 720 in tandem as standard. Electronic EC axial fans in the outdoor circuit - These fans adapt their rotation speed to the installation requirements, thereby reducing electricity consumption, the sound level at partial charge and improving the average seasonal output of the unit. Plug-fan - Electronic plug-fans in outlet and/or return with variable speed and flow sensor. Consult dimensions schemes with optional supply plug-fan. Facilities type of service industries consumption of fans associated with air transportation assumes a high % of the annual consumption of air conditioning. The use of fans of greater efficiency has a direct impact on the reduction of consumption. Plug-fans with variable speed have associated the following advantages: • Elimination of friction loss of the transmission by direct link. • Greater efficiency aeraulics of the rotor (impeller jet with optimized profile), with very high available pressure. • Greater efficiency of the motor, DC motors of permanent magnets powered by electronic switching integrated in the motor. • Variable speed that allows to keep the outlet flow constant regardless of the degree of clogging of filters. • Accurate measurement of flow, a section calibrated in the fan aspiration and a differential pressure sensor allow control handling flow reliably both on VAC as VAV systems. Free-cooling management The operation of the unit in free-cooling allows the outdoor air conditions to be taken advantage of when these are more favourable than those of the return (or ambient) air. As such, this allows the cooling capacity to be reduced under these circumstances. - The percentage of air refreshing will range from 0% to 100%. - There are three options for the free-cooling management: - Thermal, with comparison of temperatures. - Enthalpic, with comparison of enthalpies. - Thermoenthalpic, with comparison of enthalpies and a correction for temperature.
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