9
Functional description
Important
The ventilation system should operate continuously!
It is not advisable to stop ventilation.
Function
The HEX 30 is designed to control the internal temperature of a universal shelter or
room with respect to climate, moist and airborne.
The HEX 30 removes excess heat from electronic equipment and is especially suited in
applications where the equipment requires to be maintained within defined temperature
limits to achieve optimum performance and to maximize component lifetime.
Two separate air
flows
The two air flows (internal/external) are to-
tally separated. The external air is only
used to cool down the internal air via the
heat exchanger. The air flows are never
mixed.
This illustrates the air flow of the HEX 30:
Internal air flow
The warm internal air is sucked from the enclosure into the internal fan at the top of the
HEX 30 and let through the heat exchanger, where it is cooled down.
After the cooling in the heat exchanger, the air is let back into the enclosure.
External air flow
The cold external air is sucked into the external fan at the bottom of the HEX 30 and let
through the heat exchanger, where it is cooling down the internal air.
After having passed through the heat exchanger, the air is let back to the external envi-
ronment at the top of the unit.
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Control strategy
The control board controls the fans according to the temperature of air in the top cabi-
net.
The higher temperature the higher fan speed.
Continued overleaf
