Sauter flexotron®800
ventilation
Functional description
P100012082
32
In addition to these three, it is possible to connect another anologue output signal to
control an optional sequence, Y4 Extra sequence. "Y4 Extra sequence" is set in the
same way as above. You can also choose if you want the output to be affected by the
enthalpy control and/or the cooling recovery.
0 % at HCOut = 0 %
100 % at HCOut = 0 %
It is also possible to split one of the three analogue outputs heating, heat exchanger or
cooling into two equal parts to give a fourth output sequence for temperature control.
5.1.1
Control modes
1. Supply air control
The supply air temperature is kept at the setpoint value by controlling the output signals
for "Heating Y1", "Exchanger Y2", "Cooling Y3" and "Extra sequence Y4". A single PI
control loop is used.
The setpoint value is set using the front panel or alternatively using an external setpoint
device.
Alarms which are activated when the supply air temperature is too high or too low are
active.
Alarm for control offset of the supply air temperature is active.
2. Outdoor temperature compensated supply air control
The supply air temperature setpoint is outdoor temperature compensated using a
control curve with 6 node points.
The supply air temperature is kept at the setpoint value by controlling the output signals
for "Y1 Heating", "Y2 Heat exchanger", "Y3 Cooling" and "Y4 Extra sequence". A single
PI control loop is used.
Alarms which are activated when the supply air temperature is too high or too low are
active.
Alarm for control offset of the supply air temperature is active.
3. Cascaded room temperature control
Cascade control of room temperature and supply air temperature to achieve a constant,
settable room temperature. The room controller output signal generates the supply air
controller’s setpoint value.
One or two room sensors can be connected. If two sensors are connected the average
of their values will be used. The number of room sensors is detected automatically. The
room temperature is kept at the setpoint value by controlling the output signals for "Y1
54%
50%
32%
30%
0%
0%
Controller
signal
Cooling
Heating
Heat
exch.
Output signal
100%
100%
Heat demand
