Page 90 - IOM / Rooftop Smart and Linéa™ Range
REGULATION OF SUPPLY AIR
Supplying air regulation should be activated by setting
setpoint 61 to ON.
The main aim of supplying air regulation is to maintain the
temperature of supplied air at a value close to the average
of the neutral zone, if ambient air regulation is not active.
Two power factors, one for cooling (variable 101), and the
other for heating (variable 100), are calculated according to
the difference in temperature between the setpoint and the
reference temperature.
The power factors are periodically recalculated by the
CLIMATIC™. The integration time (setpoint 62) is adjustable
ORDER OF COMPONENTS IN REGULA-
TION
Cooling operation
Setpoint 63 =
Off
Damper
è
Water coil
è
Compressors
Setpoint 63 =
On
Damper
è
Compressors
è
Water coil
Heating operation
Setpoint 64 =
Off
Water coil or electric coil
è
Compressors
è
Gas
Setpoint 64 =
On
Compressors
è
Gas
è
Water coil or electric coil
Setpoint 65 =
Off
Water coil or electric coil
è
Gas
è
Compressors
Setpoint 65 =
On
Water coil or electric coil
è
Compressors
è
Gas
REGULATION IN HUMIDITY
Two power factors, one for dehumidifying (variable 105),
the other for humidifying (variable 104), are calculated
according to the difference in relative humidity between the
setpoint and the reference relative humidity.
The power factors are recalculated periodically by the
CLIMATIC™. The integration time is adjustable (setpoint 67).
SETTING THE FRESH AIR MINIMUM
The minimum value for opening the damper to outside air
can be set by instruction (see configuration of operating
zones). This value is expressed directly as a percentage.
CLIMA
CLIMA
CLIMA
CLIMA
CLIMATIC™ P
TIC™ P
TIC™ P
TIC™ P
TIC™ PAR
AR
AR
AR
ARAMETERS
AMETERS
AMETERS
AMETERS
AMETERS
CO² SENSOR
Where a CO² sensor is connected to the unit, the value of
the fresh air minimum is calculated according to the CO²
ratio.
The value measured by the sensor can be read in variable
17.
2000 ppm
CO2
0 ppm
100%
Figure 80
Setpoint 48 defines the number of ppm up to which the fresh
air minimum is still achieved. Setpoint 49 defines the number
of ppm from which 100% fresh air is used
ENTHALPY FUNCTION
This function is used to control the use of the economiser
register according to air enthalpy. If the outside humidity is
greater than the inside humidity, the respective enthalpy
values are then calculated. According to the result obtained,
input of new air is optimised.
COMPRESSOR-RELATED FUNCTIONS
Anti-short cycle
The CLIMATIC™ provides protection of the compressors
against frequent restarts. This is why the compressors
cannot be started, even if requested to do so by regulation,
unless the time since they were last put into operation is
greater than six minutes.
Defrost function
For heat pump units and air condensation units, cycle
inversion phases are programmed for defrosting the outside
coil.
Defrosting is activated depending on :
- outside temperature (limit set by setpoint 85),
- coil temperature (limit set by setpoint 86),
- with overall weighting by an icing constant (setpoint 87).
Setpoint 48
Setpoint 49
