5
Control methods and system components
5.1
Ventilation and temperature control in air-conditioning systems
In temperature control, various control methods are differentiated between: Supply air tem-
perature control, exhaust air temperature control, exhaust air cascade control, room and
room cascade control.
5.1.1 Supply air temperature control
The sensor input F1 is the control variable input by default. Alternatively, the supply air tem-
perature can also be guided over the analog input AE1 to the controller.
The supply air temperature is controlled by a PID algorithm with an adjustable
Supply air
temperature set point. Depending on the system code number, the temperature control loop
has between 1 and 3 sequence outputs that are adapted to the dynamics of the correspond-
ing system components by means of the
K
P
, T
N
and
T
V
control parameters. Functions such as
return air temperature limit, summer compensation, manual set point correction or condensa-
tion detection can shift the set point. The supply air can be controlled dependent on the out-
door temperature.
Functions
WE
Configuration
Control method
Supply air control (–> page 17)
Sensor F1, supply air temperature
or
Assignment of inputs AE1 to AE4
OFF
Fb1 = ON or
Fb18 = ON,
option
: AE1F1
Parameters
WE
Range of values
Supply air temperature set point
22 °C
0 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
5.1.2 Exhaust air temperature control
The sensor input F2 is the control variable input by default. Alternatively, the exhaust air tem-
perature can also be guided over the analog input AE3 to the controller.
The exhaust air temperature is controlled by a PID algorithm with an adjustable
Exhaust air
temperature set point. Depending on the system code number, the temperature control loop
has between 1 and 3 sequence outputs that are adapted to the dynamics of the correspond-
ing system components by means of the
K
P
, T
N
and
T
V
control parameters.
EB 5477 EN
37
Control methods and system components