The units are available for a total of 8 models:- 300 mc/hairflow rates, for horizontal and vertical configuration, with water or air condenser.- 500mc/h airflow rates, for horizontal and vertical configuration, with water or air condenser.
The selectable modes are:
• summer mode or winter mode with high efficiency heat recovery.• dehumidification and summer mode integration with control of fresh air temperature.
• heating and winter mode integration with control of fresh air temperature.
In dehumidification mode is possible to blow supply air in range of temperature "neutral-cooled", thanks to the presence of two expansion valve that modulates the flow of the refrigerant gas, allocating the heat of condensation between the post heat exchanger and the heat sink.
The heat sink, in water condenser configuration, is a plate heat ex- changer supplied by the radiant system.
In the air condenser configuration, the heat sink is a finned coil positioned on the exhaust air flow; this configuration doesn’t need to be supplied by the radiant system, with less energy consumption than the water condenser configuration
The units are in "single-piece" construction, with external structure in single metal sheet, internally insulated.
Both the horizontal and vertical versions of DHRN are equipped with air round duct adaptors, for easy connection during the installation. Especially, the 300mc/h horizontal configuration is distinguished by a compact height (only 275mm), that can be easily installed in a ceiling.