43
Service manual
Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
3.9.10 Ventilation control at constant pressure
This function is used to change the fan speed, keeping constant the pressure at the reference point in the air channel, with
respect to the setpoint value.
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 UM
Description
RFA7
30
%
Minimum speed
RFA8
100
%
Maximum speed
RFA33
30.0
Pa
Constant pressure control - Pressure setpoint
RFA34
10.0
Pa
Constant pressure control - Min. pressure setpoint
RFA35
100.0
Pa
Constant pressure control - Max. pressure setpoint
RFA36
2.0
Pa
Constant pressure control - Neutral area
RFA37
5.0
Pa
Constant pressure control - Differential required for decrement
RFA38
5.0
Pa
Constant pressure control - Differential required for increment
RFA39
60
s
Constant pressure control - Max. increment time
RFA40
15
s
Constant pressure control - Min. increment time
RFA41
60
s
Constant pressure control - Max. decrement time
RFA42
15
s
Constant pressure control - Min. decrement time
RFA43
5
%
Constant pressure control - Max. increment amplitude
RFA44
1
%
Constant pressure control - Min. increment amplitude
RFA45
5
%
Constant pressure control - Max. decrement amplitude
RFA46
1
%
Constant pressure control - Min. decrement amplitude
Below is a graphical representation of the parameters involved in ventilation control in order to achieve and keep the pres
-
sure value stored in the setpoint at the measurement point.
RFA36
RFA37
RFA41
RFA42
Tvar s
RFA33
Pdr Pa
RFA36
RFA38
Dec
Inc
RFA40
RFA39
RFA36
RFA37
RFA45
RFA46
Avar %
RFA33
Pdr Pa
RFA36
RFA38
Dec
Inc
RFA44
RFA43
Fig. 18 Images showing the percentage and time variation as pressure changes
3 Software functions
Summary of Contents for UATYA-B
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