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Application Guide / FLEXAIR-AGU-1505-E
2.4- ELECTRICAL OPTIONS
ENTHALPY CONTROL AND CO2 SENSOR
This option includes combined temperature and humidity
sensors, to ensure that the economizer does not use 100%
fresh air if the outside air has a higher enthalpy than the return
air.
The CO2 sensor A VOC (Volatile Organic Component) detects
the amount of CO2 in the ambient air between 0 and 2000PPM.
(This obviously varies depending upon space occupancy levels).
The VOC sensor sends a proportional signal (0-20mA) to the
controller which will modulate the fresh air.
This option is highly reccomended in commercial installations
like restaurants, shops, etc., where the CO2 level strongly varies
during the day (e.g. depending on the people occupancy). In these
installations in fact the energy savings coming form the correct
air-renewal air-fl ow management (depending on CO2 level) can
defi nitively pay back this sensor cost in a very short time.
ENERGY METER
The FLEXAIR meter option is a device that measures and
displays the following parameters:
• Average, total and maximum current, voltage and frequency
for each phase.
• Active & reactive power.
• Power factor (Cosφ).
• Total active & reactive FLEXAIR consumption in Wh.
Values for FLEXAIR, current and absorbed power can be reset
with password.
Some of these data will be collected by the controller and made
available in the BMS tables for Modbus, BACnet and Trend
protocols (not available for LonWorks).
3 PHASE CONTROL
This phase control device offers the guarantee of the correct
phase connection, together with an overvoltage and under
voltage protection.
FIRE DETECTOR
It is a thermostat that provides a signal to switch off the unit,
close the fresh air damper and open the return damper when
the temperature in the return air stream is above an adjustable
set point (Factory setting: 70°C).
SMOKE DETECTOR
Located downstream of the fi lter, the optical head of the smoke
detector can detect any type of smoke. When this occurs the
unit will stop operating, the return air damper will be fully closed
and the fresh air damper will fully open while sending an alarm
signal to the unit.
In accordance with the European norm, it is also compliant with
the French regulation on public buildings.
2- OPTIONS DESCRIPTION
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