sauter NRT407, Руководство пользователя

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NRT407 manual Part III Configuration 31
Presence detection depending on the CO
2
concentration
This function is not active when the controller is configured for Heating/Cooling with VAV-
control.
When the CO
2
concentration exceeds the set value for activation of presence, UO3 will
switch to forced ventilation if the presence operating mode is set to Bypass. It will stay there
until the concentration drops below the set value (FS=800ppm) minus the hysteresis
(FS=160ppm). When the concentration drops below this value, the controller will remain in
presence mode for the duration of the configured occupancy off-delay (FS=10min).
Minimum limit for the heating output
In some applications, it is desirable to set a minimum limit for the heating output in order to
prevent, for instance, downdraughts under windows. In general, this function works in a way
similar to the minimum limit for the cooling output. However, there is a difference between
the minimum limit for the heating and cooling output as the minimum limit for the latter still
remains active after the controller enters heating mode. In addition, the minimum limitation
for the heating output functions in all control modes.
Features for NRT
0…10 V input The 0…10 V input used as a CO
2
input supports a general 0…10 V signal. This input is not
connected to any function but only acts as a read-out for the signal. To configure this option,
parameter 81 is set to option 7, “0…10 V”.
Flow input AI2 may be configured as a flow calculation input. A flow corresponding to 0 V and one
corresponding to 10 V is set, and the flow is then calculated linearly between these two end
points. To configure the flow calculation, Parameter 81 has the additional option 8, “Flow
calculation”.
The calculated flow value may be shown in the display by setting parameter 42 to option 9.