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2. Free cooling
Under this mode, the ambient air will come into the cabinet through a filter to cool down the cabinet
and the hot air generated by the cabinet's components will forced to outside.
Active parts
The active parts are controlled by the control board. The controller will operate these elements mainly
based on the temperature reading of the return air sensor. This is placed in the return air duct giving a
good representation of the enclosure temperature.
1
D amper
、
2
I nternal DC fan
、
3
C ompressor
、
4
C ondenser fan
、
5
F ilter blockage detection kit (option)
、
6
H umidity detector (option)
、
7
H eater kit (option)
、
Temperatures
The following terms for temperatures are used in the following description:
1
A mbient temperature is the outside air temperature
、
2
、
S upply air temperature is the temperature of the air leaving the unit to cool the electronic equip-
ment.
3
R eturn air temperature is the temperature of the air entering the unit from the electronic equipment.
、
4
、
C ondenser temperature is the temperature of the refrigerant from the condenser.
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