Combination Of The Limits; Low Dehumidification Temperature Limit; Timed Dehumidification Function - Mitsubishi Electric Evolution+ s-MEXT Technical Manual

8.2.4

Combination of the limits

Combined use of the high and low limits is shown in the graph below:
Dehumidify
ON
Dehumidify
OFF
Dehumidify
ON
Dehumidify
OFF
Figure 8-6: chart showing the temperature limits for dehumidification with heating resources.
8.2.5

Low dehumidification temperature limit

There is another limit above which, irrespective of whether there are any heating/post heating resources, the dehumidification
function is immediately inhibited.
This limit keeps the unit from operating under low evaporation conditions.
The parameter for defining the low temperature limit is under the "Set Point" menu.
The lower set limit of this parameter is defined by the low temperature limit parameter under the "Safety" menu accessible with
the "Factory" password.
For the default values, see the parameters table.
8.2.6

Timed dehumidification function

For direct expansion units, another function is added in order to time the operation of the dehumidification.
Version 38
P50.01
2 * Differential P20.18
Figure 8-5: dehumidification temperature limit graph.
P50.02
P20.19 Differential
2 * Differential P20.18
P50.01
2 * P20.18 Differential
T (°C)
ambient
T (°C)
ambient
149