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TF6746_A_NOT_DXA230_REFERENCE
Aereco S.A.
The Heat Recovery Unit : DXA Unit
The DXA has been specifically designed for wall or cupboards installation. Thanks to its wellfitted dimensions, the DXA can be installed in technical
rooms, wallmounte.
2.
DESCRIPTION
2.1. GENERAL INFORMATION
The DX System is a range of smart heat recovery ventilation systems that continually supply pollen-free and dust-free preheated fresh air to living areas,
ensuring a comfortable feel-good climate.
The DXA REFERENCE is a heat recovery unit with constant airflows for vertical installation (on the wall) in the apartment or in the house, from 2 to 6 main
rooms, and from 1 to 5 technical rooms (kitchen, bathroom, others wet rooms). The dwelling has to be limited to 2 floors (1 ground floor and 1 floor
maximum), and has a maximum surface of 210 m². This HRV (Heat Recovery Ventilation) system can also be used in offices, hostels, etc., if the required
airflow is in accordance with the one offered by the system.
General working of the DXA System, REFERENCE Version
The DX A System is comprised of a heat recovery unit (DXA Unit
1
)
connected to exhaust and supply ductworks. The counter-flow heat
exchanger, integrated into the main unit, ensures the recovery and transfer
of most of the energy from the exhaust air to the supply air, thus limiting
the energy required to heat the fresh air.
According to the size of the dwelling and the number of occupants,
supply and exhaust airflows can easily be set from the interface (80 m
3
/h,
140 m
3
/h, 200 m
3
/h or 230 m
3
/h). Outdoor filtered air is supplied
3
in
the bedrooms and in the living room. Stale air is extracted
7
from the
kitchen, bathroom and WC.
At all times, total supply airflows and total exhaust airflows are measured
through pressure sensors placed in the DXA unit. The use of electronic
pressure sensors allows to calculate with a very high accuracy supply and
exhaust airflows without influence of clogging filters or ductwork pressure
drops. So, a dedicated micro-controller drives the two fan motors in such
a way that supply and exhaust massflows are balanced according to the
desired airflow setting point (80 m
3
/h, 140 m
3
/h, 200 m
3
/h or 230 m
3
/h).
The DXA Reference allows 4 specific regulation modes :
-
Absence mode
. This mode runs a 40 m
3
/h airflow ventilation for a
duration the customer may choose within a list of 1, 2, 3, 6, 14 or 30
days.
-
Overventilation mode.
This mode increase ventilation airflows staying
on the bypass rules. The customer may choose the over ventilation
airflows within a list of 140, 200, 230 or 250 m
3
/h for a duration he can
also choose (1, 2, 3, 6, 12 or 24 hours).
-
Free cooling mode or Free warming mode
. This mode is an over
ventilation mode enable only if temperature conditions allow to refresh or
to warm the dwelling.
-
Stop mode
. This mode allows to stop the fan motors. This mode may be
useful, for example not to clog the filters in case of works in the dwelling.
