• 7 •
020S - 045D
055D - 140D
020S - 045D
055D - 140D
Application Guide • AIRCOOLAIR-AGU-1603-E
OPTIONS
FRESH AIR OPTIONS
Economizer
Free cooling is provided through the use of fresh air when it’s
appropriate rather than cooling the return air. Using an economizer
is the easiest and most effi cient way to modulate fresh volumes
and reduce running costs for air conditioning application, as well
as improving air quality. Fully controlled by the CLIMATIC, it is
also able to ensure that minimum fresh air is provided in line
with Indoor Air Quality Regulations. Economizer operates using
a «sensible» control. It is possible to prevent the economizer
from supplying air below a certain temperature (adjustable set
point, 10°C as default).
On sizes 20S to 45D
, the economizer is factory fi tted on unit
and tested prior to shipment. It includes 2 dampers operating
from a 24V actuator.
On sizes 55D to 140D
, the economizer is delivered as a separate
module that can be installed as monobloc on site. It includes 3
dampers operating from 3x 24V actuators
Exhaust module
The exhaust fans eliminate the air overpressure in the room. It
is driven by the Climatic controller.
On sizes 20S to 45D
, it is delivered as a separate module that
can be connected to the return duct.
On sizes 55D to 140D
, this exhaust fan is in built in the
economizer casing
Return Module
The RETURN FAN module is necessary when the return duct
circuit creates high pressure drops. It offers available static
pressure up to 250-300 Pa.
It includes a separate casing to be connected to the economizer
casing with the ductworks.
The return module drives the opening and closure of the 3
dampers regarding the amount of fresh air introduced.
eDrive: available in Non Standard Request
eDrive, direct transmission on return fan and supply fan :
variable speed fans adjust airfl ow rate to the exact needs
and during unoccupied period. This feature saves up to 30%
annual energy consumption and reduces maintenance costs.
CLIMATIC manages air fl ow rate passing through the unit
following 3 possible strategies.
eDrive control strategies can be changed with each time zone
in occupied or unoccupied mode. Whatever the control stra-
tegy, soft starter is still available to infl ate fl exible ducts and
reduce inrush current during fan starts.
- Standard mode : Constant air fl ow rate
- Dead Zone mode : Reduced air fl ow rate in “dead zone”.
- Part Load mode : Variable air fl ow rate during part load and
dead zone.
Summary of Contents for AIRCOOLAIR ASC 020S
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