Zephir3 is a unit for primary air handling and purification. It recovers the energy from the exhaust air thanks to the heat pump circuit provided for standard with inverter compressors and modulating hot gas re-heating coil.
Thanks to these features, it can be easily adapted to different plant design and operation logics.
For example, considering a centralized primary air system (air distribution in different and independent areas) or a traditionally designed system, the Constant Supply Control operation is the best solution: in every operating mode (both summer and winter) the unit always works in order to guarantee the desired input conditions, both in temperature and humidity. In particular, in cooling operation, the unit modulates the capacity of the refrigeration circuit in order to meet the humidity level required, then manages the hot gas re-heating to supply air at the required supply temperature.
In heating operation, the capacity of the unit is modulated in order to achieve the desired inlet air temperature, activating the humidifier when provided to increase the specific humidity ratio of the inlet air.
Whereas, considering a system with homogeneous areas (open space or several separate but homogeneous rooms from the loads profile point of view), the Maximum Available Capacity mode is very interesting.
In fact, with this configuration, the operation of the unit is strictly linked to the punctual indoor conditions, adapting its operation to contribute to satisfy the internal loads.
In particular, in cooling mode, humidity control is always a priority, while the supply air temperature (thanks to the modulation of the re-heating coil) is as lower as the return temperature is far from the set point.
Similarly in heating mode, the supply temperature is as hotter as the return temperature is far from the set point.
As a direct consequence, part of the internal load can be satisfied directly by the Zephir unit thus allowing to faster reach achieve the indoor set point and to undersize the main system (eg fan coil, VRF) with a final economic saving on the management of the system.
In addition to these functional advantages, Zephir solution, as a packaged and autonomous product, makes the primary air handling independent from external heating and cooling plants and from the relative auxiliary components usually designed in traditional systems: consequently, the system design and all installation, start-up and maintenance activities are greatly simplified.