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Functional description of HEX 70/90/120 and parts
Introduction
This section describes how the internal and the external fans of HEX 70/90/120 oper-
ate.
Usage of
HEX 70/90/120
HEX 70/90/120 is designed to control the internal temperature of an outdoor enclosure
with respect to climate, moist and air.
HEX 70/90/120 removes excess heat from electronic equipment and is especially suit-
ed to maintain equipment within defined temperature limits to achieve optimum perfor-
mance and to maximize lifetime of the components in the installation.
Important
Dantherm Air Handling recommends that the cooling system should be running contin-
uously!
Two separate air
flows
The illustration and table below show the airflows of HEX 70/90/120.
The two air flows (internal/external) operate separately. External air is only used to cool
down internal air via the heat exchanger.
The air flows are not mixed
.
Part
Function
External airflow
Internal airflow
Internal fan
External fan
Control board
Internal air flow
Warm, internal air is sucked from the enclosure into the internal fan at the top of
HEX 70/90/120 and let through the heat exchanger, where it is cooled down. After cool-
ing in the heat exchanger, the air is let back into the enclosure.
External air flow
Cold, external air is sucked into the external fan at the bottom of HEX 70/90/120 and let
through the heat exchanger, where it cools down the internal air. After passing through
the heat exchanger, the air is let back to the external environment at the top of the unit.
Continued overleaf
