Figure 2. Operating principle of the Halton Rex Expander chilled beam
In figure
Operating principle of the Halton Rex Expander chilled beam
, the blue arrows show the supply air coming
through the supply slots. The red arrows show the ambient room air going through the front panel and the heat
exchanger.
Halton Air Quality (HAQ) control
Halton Air Quality (HAQ) control is used for adjusting or controlling the rate of the additional supply airflow in a
room space. In normal conditions, fresh supply air is provided through the nozzles. Whenever additional air is
needed (boost/VAV function), the HAQ control opens and provides more air. VAV stands for Variable Air Volume.
The HAQ control can also be used as a Constant Air Volume (CAV) damper, that is, it can be used for adjusting the
k-factor to achieve the correct airflow with a certain pressure level. This removes the need for changing or plugging
the nozzles of the Halton Rex Expander chilled beam.
Figure 3. VAV function: Supply air from nozzles (normal mode)
Halton Rex Expander (RXP) - Installation, commissioning, and maintenance guide
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