Standard Shelter
Cod. +030221471 – Rel. 2.0 – April 01, 2003
8
3.4 OTHER HUMIDITY FUNCTIONS
The high and low humidity alarms generate a signal with an alarm screen.
The delay can be modified.
4 OUTLET LIMITATION
This function prevents the introduction of air that is too cold. A temperature probe must be installed on the shelter outlet, and both the probe and
the function must be enabled, by setting the following parameters: Outlet limit set point and Outlet differential; these define a limitation zone, as
represented in the following diagrams.
The outlet limitation function acts on the proportional cooling request. The effect on the devices is therefore the same as when the room
temperature decreases, that is, progressively stopping the devices (see the paragraph on “Temperature control”).
NB.: All of the values in the following graphs refer to the default values
Outlet Limit
NO LIMIATION
TOTAL LIMITATION
8°C
12°C
Outlet Differential
Limitation of
request
100%
0%
4°C
If we consider that the room temperature, and therefore the proportional request, remain constant, a graph can be defined that shows the
effective request in the various operating conditions:
Effective
re
uest
Outlet
temperature
8°C 9°C 10°C 11°C
100%
50%
75%
25%
12°C
Outlet
Limit
100%
75%
50%
25%
With constant room
tem
erature
26.5°C
25.7°C
25°C
24.2°C
0%
23.5°C
Outlet differential
As can be seen, if the outlet temperature is between the outlet set point and the outlet differential, the cooling devices are increasingly limited as
the temperature lowers.
The limitation function works differently in dehumidification mode, where the modulation zone is ignored, as illustrated in the following diagram:
Humid. Set
30.0%
Humid. Diff. Dehum. Diff.
Low humidity alarm
10.0%
20.0%
Ambient
humidit
%
10.0%
HUMIDIF.
DEUHMID.
30.0%
80.0%
High humidity alarm
Outlet temp.
°C
OFF
Outlet differential
Outlet limit
8.0
4.0°C
DEHUMID.
POSSIBLE
DEHUMID.
OFF
OUTLET LIMITATION
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