Rules for a correct duct network
- Each duct must serve a maximum of 2 fans – DO NOT EXCEED this limit.
-
In case of multiple fans in the same duct, they must belong to the same refrigerant circuit and to the same V coil system – DO NOT
MIX refrigerant circuits or V coil systems in the same duct.
The duct connections on the units must not generate any mechanical stress on the fan supporting structure.
The fan shrouds and the fan protection grilles must always remain in their position inside the ducts.
Use bellows or flexible sleeves for the duct connection.
At the start of each duct, install an access hatch measuring at least 700 x 700 mm to allow maintenance of fan
components (motor replacement, removal of impeller).
Fan motor electrical protection
In case of a locked rotor or an overload, the motors of each circuit are electrically protected by the circuit variable speed drive.
Each drive follows a variable current characteristic, based on the frequency from 10 to 60 Hz and the number of controlled fans.
If a fan stops working, the variable drive will automatically detect the malfunction.
Refer to the control manual for the list of alarms specific to this option.
12.2.11 - TOTAL/PARTIAL FREE COOLING
Reducing operating costs and protecting the environment have become the key concerns, both for air conditioning applications, and
for industrial processes and cooling data centres.
The Free Cooling option allows significant energy savings to be made in all applications that require cooling throughout the year,
particularly when used in colder climates. In these regions, Free Cooling can be used to fulfil a large proportion of the cooling requirements
both economically and in a way that respects the environment.
Operating principle
When the outdoor air temperature is lower than the setpoint temperature, the Free Cooling hydraulic system can be used to cool the
customer loop by allowing fluid to circulate in the micro-channel coils, positioned in parallel with the MCHE condensers. With this type
of operation, it is possible to save energy when outdoor temperatures are low.
Hydraulic Free Cooling is available as 2 options:
-
Total hydraulic Free Cooling: the FC coils are built into each condenser on two refrigerating circuits.
-
Partial hydraulic Free Cooling: the FC coils are built into the condensers on a single refrigerating circuit.
12 - OPTIONS
AQUACIAT
POWER
™ LD/ILD
EN-78
