CLIVET ELFOFresh2 CPAN-U 70-120 Series - Flow modulation; The new fans in direct current gave saving 60% for the absorbed capacity; The air flow reduction guarantees the comfort during winter operation; Nominal air flow operating: fulfill of the building load in addition of the ventilation

16 ELFOFresh² BT15B012GB-00
Flow modulation
The new fans in direct current gave saving 60% for the absorbed capacity
The energetic consumption for the ventilation represents the main cost for the fresh air units.
In order to reduce the operating costs and obtain the highest energy saving, all units have high-eciency fans with electric control in
direct current: an energy saving 60% than traditional fans is guaranteed.
The electronic control the automatic modulation of the air ow that, according to the requirements, can increase, in case of FREE-COOLING,
or decrease for the dehumidication, extending the functional limits, and limiting the optional use of modular electric heaters from 0,7 or
3 kW (optional) only for exceptional situations.
The unit is congurated for 40 Pa available head; by changing some parameters it is possible to reach up to 120 Pa.
The air ow reduction guarantees the comfort during winter operation
In correspondence to the low temperature values of the fresh air (lower than – 5°C), the intake temperature is xed (I), approximately equal
to the indoor air (20°C) using the air ow reduction (A).
This reduction is performed in order to avoid the intake of fresh air in the rooms that might cause the risk of uncomfortable cold draughts.
In this conditions, the active thermodynamic recovery can completely satisfy the ventilation load.
Nominal air ow operating: fulll of the building load in addition of the ventilation
In the range of fresh air temperature between – 5 °C and + 20 °C,
the fresh air ow rate keeps constant (B): the intake temperature
in the room (II) increases as the fresh air temperature increases;
ELFOFresh
2
, besides compensating the ventilation dispersions, is
able to full, either completely or partially, the building load for
heating of building.
Increase of air ow rate for cooling the rooms in middle season
In the range between + 20 °C and + 25 °C the building might need
being cooled, though without relevant need, it is also possible
to perform the free-cooling, by simply allowing a higher air ow
rate into the rooms and leaving the compressor deactivated (C).
In this case, the eciency is dened as the ratio between the
cooling capacity delivered to the room by the fresh air (directly
proportional to the temperature dierence between outdoor
and indoor, according to the fresh air ow rate) and the absorbed
electric capacity (in such case, only by the fans). Due to the reduced
absorption of the fans, it is possible to reach a very high eciency
in this operating condition. The intake temperature in the room is
exactly equal to the outside one (III).
Reducing the air ow rate to dehumidify
For a more ecient dehumidication of the fresh air, ELFOFresh
2
reduces the ow rate by modulating the fan speed (D); in this way, it is
possible to cool the rooms by using radiant panels with a subsequent ecient dehumidication.