SAUTER flexotron®400 - RDT410
Control modes
P100012103
13
5
Control modes
The RDT410 can be configured to any one of the following control modes.
1. Supply air temperature control.
The supply air temperature is kept at the setpoint value by controlling the output
signals on AO1 and AO2. A single PI control loop is used.
2. Supply air temperature control with outdoor compensation.
The supply air temperature is kept at the setpoint value by controlling the output
signals on AO1 and AO2. A single PI control loop is used.
The setpoint is automatically adjusted according to the outdoor temperature.
3. Cascade connected, room temperature influenced, supply air control.
The room temperature is controlled by means of adjustments in the supply air
temperature, depending on the room temperature. A cascade controller with a
room temperature and supply air temperature sensor is used. The supply air
temperature is minimum and maximum limited.
4. Radiator circuit control with outdoor curve.
The water temperature setpoint is changed according to the outdoor
temperature. A single PI control loop is used. A room temperature sensor can be
added to give corrective action if the room temperature differs from the setpoint
5. Domestic hot water control.
The water temperature is kept constant by controlling the output signal on AO1.
A single PID control loop is used.
5.1 Control modes 1, 2 and 3
These three modes have a lot in common and will therefore be treated in a single
section.
For control mode 1, Supply air temperature control” you need only one
sensor,”Supply air sensor” on AI1.
For control mode 2, “Supply air temperature control with outdoor compensation”
you need two sensors, “Supply air sensor” on AI1 and “Outdoor sensor” on AI2.
