Fan Control - Dantherm DanX 1 User Manual

4. CONTROLS
Temperature level in the pool hall is lower than the set point:
•
The heating coil is running.
•
The outdoor / exhaust air dampers are partly open in day time (Set point Fresh air
amount - Min_Fresh_Air) and will be closed in night time.
Temperature level in the swimming pool hall is higher than the set point:
•
The heating coil will be stopped.
•
The outdoor / exhaust air dampers will open more to get more cooled outdoor air to
the pool hall (overriding the set point Fresh air amount - Min_Fresh_Air). Secondly the
by-pass damper will slowly open to avoided heating the outdoor air in the heat
exchanger.
•
The controller will give a digital signal to an optional cooling unit.

4.7.3 Fan control

Normally the fans are running at the speed set in the Time Program, but if the speed is set to
low speed (Open Pool Low or Closed Pool Low) there can be the following reasons why the
unit is running still on full speed.
•
If the calculated dehumidification demand is >5%, the fans will go to full speed, until
the calculated dehumidification demand is again <5%.
•
If there is a demand for free cooling (Outdoor_Air_Temp < Room_Temperature) the
fans will go over to full speed until the set point temperature has been reached again.
•
If there is a larger difference between the actual hall temperature and the set point
than 2°C the fans will go to high speed, until the difference is lower than 2°C.
•
If the supply air temperature is above the set point (Max_Supply_Temp).
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