Description:

Digital Controller for Heat Recovery Ventlation unit. NR9002 is used for regulation of mechanical ventilation units with heat recovery device used to grant a correct air renewal considerably reducing thermal dispersion during winter time and thermal load during summer time with consequent primary energy saving. NR9002 is a digital controller able to manage supply and extraction fans both three fixed speeds and proportional (0-10V), both with manual and automatic logic (on the basis of air quality or humidity); moreover it allows to manage a post-treatment hydronic battery (2 or 4-pipe) with ON/OFF, 3-point or proportional valves, a pre/rehating battery and a recovery device bypass circuit to perform free-cooling or free-heating on the basis of external and room temperature. NR9002 manages up to 4 aeraulic configuration modes depending on the presence and position of the intake, discharge, by-pass and recirculation dampers. NR9002 is endowed with MODBUS (SLAVE) protocol to communicate with the supervisory system and/or other MODBUS (MASTER) devices,so it can be easily integrated in other HVAC system present in the building