9
Directing the airflow
With direct air discharge, pay particular attention to the direction
in which the air is discharged.
• Air deflectors (ref a)
These deflectors should be directed so that a maximum volume is
given to the envelope of the airstream. Below, the diagram shows
the optimum position required to acheive the best possible airflow
performance.
• Integral diffuser
In the cooling mode, cool air is discharged horizontally just below
the ceiling, ensuring even air distribution in the room due to the
«coanda» effect without causing drafts.
In the heating mode, airflow can be directed so as to prevent stag-
nation at certain places in the room (stratification of hot air).
9 - Front panel installation (cont’d)
Fig. 7
Fig. 6
a
a
a
a
A
Cooling operation (summer)
Coanda effect
Heating operation (winter)
Detail A
Depending on the configuration of the room to be air conditioned,one or two of the deflectors may be left closed.
Summer position
Winter position
YES
YES
NO
Depending on the layout of the conditioned space, 1 or 2 dampers may be closed. This is necessary for air discharge through a
discharge satellite into an adjacent room or when the cassette unit is installed too close to a wall.
Operation in heating mode only : Although the unit has an anti-stratification
function, it may be necessary to offset the return air sensor setpoint, in cases
where ceilings are particularly high for example. This can be done with the two
microswitches on the control board. Setpoint offsetting is only effective in the
heating mode and has no effect on the cooling mode.
Temp.
Switch
difference °C
2
1
0
OFF
OFF
1
OFF
ON
3
ON
OFF
5
ON
ON
1
2
ON
OFF
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