Parameters
WE
Range of values
Room temperature set point
22 °C
0 to 40 °C
Temperature set point of the slave loop
22 °C
0 to 50 °C
K
P
Temperature master loop
1.0
0.1 to 99.9
Supply air temperature minimum limit
18 °C
0 °C up to supply air temp. maximum limit
Supply air temperature maximum limit
26 °C
Supply air temp. minimum limit up to 50 °C
K
P
0.5
0.1 to 99.9
T
N
60 sec 1 to 999 sec
T
V
– – –
– – – to 999 sec
5.2
Humidity control in air-conditioning systems (Anl 6, 8 and 9)
In humidity control, various control methods are differentiated between: Supply air, exhaust
air/room temperature control, exhaust air cascade control and room cascade control.
5.2.1 Supply air humidity control
The sensor input F6 is the control variable input by default. Alternatively, the analog input
AE2 can be used.
The supply air humidity is controlled by a PID control algorithm with an adjustable
Supply air
humidity set point. The humidity control loop can be used for just humidifying or for humidi-
fying and dehumidifying depending on the control method. In humidifying and dehumidify-
ing mode, the cooling coil is controlled in sequence to the humidifier.
The requirements of the humidity control loop for dehumidifying and the temperature control
loop for cooling are converted internally into a common control signal Y3 for the cooling
coil. Each output can be adapted to the dynamics of the corresponding system components
by means of the
K
P
, T
N
and
T
V
control parameters that are adjustable.
A manual set point correction has an unrestricted effect on the control by the shifting the set
point.
Functions
WE
Configuration
Control method
Supply air control (–> page 17)
Sensor F6, supply air humidity
or
assignment of inputs AE1 to AE4
OFF
Fb6 = ON or
Fb18 = ON,
option:
AE2F6
EB 5477 EN
41
Control methods and system components