Sabiana ENY-SP-180, Technical Manual

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7
Energy Smart |
All the units are equipped with an automatic
bypass system
that totally disables use of the heat
recovery unit to permit 100%
free-cooling
(or
free-heating
). The system is controlled by logic sub-
ject to the feedback of the integrated temperature sen-
sors.
Also, the units have the following integrated control
logic:
• The mass supply flow defined by the user is kept
constant in all outdoor climatic conditions.
• The extraction flow is kept at a constant balancing
percentage compared to the air supply flow, in order
to preserve the desired overpressure or negative
pressure for all operating conditions.
When installing the units in homes located in regions with particularly harsh climatic conditions
1
,
we recommend installing the units with integrated filament electric heaters (E versions), where
the thermal power is continuously modulated to maintain exhaust air at the desired temperature,
preventing freezing
2
. For all models, it is possible to use an external antifreeze coil, with continuous
modulation.
To prevent excessive efficiency drops due to filter clogging, it is recommended to replace the filters at
the end of the recommended period (usually every 6 months). The increase in filter dirt in fact leads
to increased fan rotation resistance, causing a significant drop in flow rates. With regard to ENY-S units,
the automatic constant flow control system (standard for the ENY-SP units), which prevents any drops
in flow rates due to filter clogging, is available as an accessory. In this case, filter clogging may result in
a significant increase in power consumption of the fans.
If the flows need to be inverted, all vertical units are reversible during installation (except
for versions with electric heater).
For each model, a complete set of Accessories is also available to meet any installation need.
1 Minimum outdoor temperature below -10 °C
2 The ENY-SP units with antifreeze protection systems are Passivhaus certified
GENERAL FEATURES