Functional Description - Dantherm HEX 30 Service Manual

Functional description

The ventilation system should operate continuously!
Important
It is not advisable to stop ventilation.
The HEX 30 is designed to control the internal temperature of a universal shelter or
Function
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.
The two air flows (internal/external) are to-
Two separate air
tally separated. The external air is only
flows
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:
The warm internal air is sucked from the enclosure into the internal fan at the top of the
Internal air flow
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.
The cold external air is sucked into the external fan at the bottom of the HEX 30 and let
External air flow
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.
The control board controls the fans according to the temperature of air in the top cabi-
Control strategy
net.
The higher temperature the higher fan speed.
Continued overleaf
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