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DESCRIPTION AND CONFIGURATION OF THE PARAMETERS
The trigger is excluded with a fixed relative differential of
1.5°C (P. 22). The trigger is also excluded if probe B2 is
malfunctioning. The percentage of opening of the damper
is shown on the display via the vertical bars next to the ice
symbol, while the start-up of the compressor is indicated by the
number 1 below the symbol itself. If free-cooling is activated
in ON-OFF (Out3), the bars may be either all on or all off
depending on the status of the damper.
Range: 0÷30°c 0÷54°F Def.: 9
rn Lower supply temperature limit
This parameter represents the minimum limit for the supply
temperature below which the damper of the shelter is closed.
With probe B4 present, the regulation is of the type described
in Fig. 6. The percentage of opening of the damper, see Fig.
6, is reduced proportionally until it is completely closed if the
supply temperature is lower than rn-3°c. This prevents air of
a too low temperature being sent into the room. In the ED and
CW configurations, the actuators turn OFF progressively, when
the supply temperature falls below the m set, the differential
is fixed at 3°C. During dehumidification, no limitation of the
supply temperature is made.
Range: -20÷30°c -4÷86°F Def.: 5
temperature regulation diagrams
Diagrams showing operation with free-cooling
low limit
Page - IOM / @DNOVA-µAC-0907-E
Lt
low limit
Fig. 3 : 1heating element and 1 compressor
If not enabled
Set = r1
Telecom unit with free-cooling
Fig. 3 : Diagram showing operation with free-cooling
ro Reading probe B2
External air temperature. only appears when the probe is
installed.
rP Reading probe B3
Percentage of humidity or pressure value. only when the
probe is
installed.
rr Reading probe B4
Supply air temperature. only appears when the probe is
installed.
rt time band setting
Sets, if the clock option is installed, the time band mode (see
chap. 7)
0= time bands disabled
1= fan on at minimum speed with temperature monitoring
2= ON/OFF
Range: 0÷2 flags Def.: 0
Dumper 100%
Ht
0.5°C
Set-rL
Dumper
Free-cooling control enabled
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