Touch Screen
31
With double set-point function enabled, if the chiller works on the second set-point (radiant panels side), the double set-point icon
appears in the toolbar of the functions in the pages of chillers and fan coils and it remains transparent.
If, however, the chiller switch to thermoregulate on the first set-point (fan coil side), the double set-point icon appears colourful.
With parameters
H129>1
:
FLOOR SIDE FUNCTION
(2° SET-POINT)
FAN COIL SIDE FUNCTION
(1° SET-POINT)
DOUBLE SET-POINT ICON
DEHUMIDIFICATION ICON
if dehumidification is active
Table 6. Double set-point/dehumidification icon
4.10.1
DEW POINT TEMPERATURE
The dew point temperature will be calculated by reading the internal temperature and humidity sensors.
Given the ambient temperature and ambient humidity, the remote control calculates the dew point (Td).
The formula used for the calculation of the dew point is the Magnus-Tetens approximation, this approximation is valid for values of
Td between 0 ° C and 50 ° C, therefore, if the calculation gives a value out of these limits yes takes the limit value as Td (0 ° C and 50
° C respectively.
Meaning of parameters:
•
Tint: ambient temperature dtected by the indoor temperature sensor (°C)
•
Tr: calculated temperature of the dew point (°C)
•
odr: adjustment offset (°C)
•
Hy: adjustment hysteresis (°C)
•
tAr: adjustment time (min.)
•
Activation time relay: 0÷100% of tAr
The temperature that is measured from the sensor inside the controller will be compared with the dew point (evaluated at the last
moment of tAr) added to the parameters odr and Hy:
•
If
Tr <Tint < Tr + odr →
the relay is activated for all next tAr time.
•
If
Tr + odr < Tint < Tr + odr + Hy →
the relay is activated for the percentage value of tAr that is detected on the pump.
•
If
Tint > Tr + odr + Hy →
the relay is activated for all the next tAr time.
The parameters tAr, odr and Hy are set in the factory and can be changed.
Figure 33. Dew point temperature – Humidostat
Summary of Contents for TOUCH SCREEN N
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