
Applicatio Manual
Universal Interface 4 DIN/NTC EK- CG2-TP
Revisione 1.0.0 - Aggiornato: 04/09/2017
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MAEKCG2TP_EN
Pag. 67
The
Ventilation
folder, that is unique, configures a main or a auxiliary stage depending on the settings choosed in the
Heating
and
Cooling
folders. Similarly, the display interface will act on manual / automatic and manual forcing of the
only fan-coil.
A particular case occurs when a fan-coil unit works in a season as auxiliary stage and in the other one as main stage. It
is for example the case of:
•
a radiant panels system that works only for heating and has a fan-coil as auxiliary stage; the same fan-
coil works as main stage for cooling;
•
a radiator system that has a fan-coil as auxiliary stage for heating; the same fan coil unit functions as
main stage for cooling.
In these cases with the configuration adopted, the following steps are necessary:
1. Settings Thermostat function = both heating and cooling. This configuration enables both folders (heating and
cooling)
2. Heating Heating type = floor radiant panels or ceiling radiant panels
3. Heating Command communication object = separated (if unique is choosen, the parameter Cooling Cooling
type does not appear)
4. Heating Auxiliary heating = enabled
5. Auxiliary heating Communication object = separated
6. Heating Ventilation for auxiliary heating = enabled
7. Cooling Cooling type = fancoils
Important!
If the fan-coil system has a 2-pipe hydraulic configuration, the objects Auxiliary heating output
command (1 bit) and Cooling out command (1 byte) have to be set in logical OR in the actuator for controlling
the fan-coil which in this case is unique.
An alternative solution that avoids the setting of a logic OR can be realized by configuring a main stage for
heating and cooling with radiant panels through separate valves and an auxiliary stage
for heating and cooling fan coil through combined valves. The offset of the auxialiary stage for cooling is set to
the value 0 (zero); this corresponds to a configuration for main stage. The object Cooling out command (1 byte)
is not connected so that the radiant panel system works only for heating.
i
9.7.5 Remote fan speed modification
The communication objects shown in figure allow to monitor actiual fan speed forced automatically (A) by the
temperature controller or set locally by the user when interacting with the LCD display and the touch buttons of the
room thermostat. The communication objects (from now on: C.O.) also allow to perform the same modifications
remotely, for example from a supervisor software.
The C.O.
52
– Fan manual status
allows to evaluate the actual fan speed; the C.O.
53
– Fan manual active status
contains the information about automatic (=0, not active) or manual (=1, active) operating mode. By modifying the C.O.
52
–
Fan speed status
[5.010
counter]
53
–
Fan manual active status
[1.011
state]
51
–
Fan manual speed
[5.010
counter]