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5.3.2
Thermoregulation in heating mode
The thermoregulation of the unit in heating mode depends on parameter "STH9", which identifies the reference probe
for the temperature value in the setpoint (parameter "STH1"), and on parameter "STH11" which determines the type
of temperature control.
In proportional control mode, the controller activates the available resources as the value read by the reference probe
decreases in comparison to the setpoint value.
When "Cascade" control is selected, the controller enables the resources and at the same time monitors the air
temperature in the delivery line.
In PID control mode, the controller activates the available resources as the demand increases. The controller
calculates the demand and checks the value measured by the probe against the setpoint value and according to its
variation over time using the parameters set in the PID.
Proportional temperature control
If parameter "STH11" is set to "0", proportional control is enabled.
The parameters involved are shown in the table.
The values of the parameters are representative. In specific cases, different values can be set.
Parameter
Value
STH1
20.0
STH4
2.0
STH5
0.0
STH6
0.0
A graphical representation is shown below.
In addition to the parameters listed in the table, the abbreviations in the graph are:
- SdR = reference probe;
- % = percentage demand value.
Translation from original instructions
Packaged Rooftop
24
UM
Description
°C
Mechanical heating / Auxiliary heating in winter mode - Temperature setpoint
°C
Mechanical heating - Proportional - Activation differential
°C
Mechanical heating - Proportional - Activation neutral zone
°C
Mechanical heating - Proportional - Offset
STH4
Fig. 6 Graphical representation of stepped heating demand
%
100
0
SdR °C
STH6
STH5
STH1
We reserve the right to make changes without any prior notice.
UATYA
4P645203-1
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